Transmission amp Distribution System輸電與配電系統 HK Electric supplies electricity to Hong Kong Island and Lamma Island Electricity is generated at Lamma Power Station (LPS) and transmitted at very high voltage ndash 275kV and 132kV ndash to various load centres via the transmission system Electricity is then distributed to customers through the distribution network at a lower voltage

The process of transmitting electricity from the power station to the load centres is termed lsquotransmissionrsquo while the process for distributing electricity from the load centres to customer buildings is termed lsquodistributionrsquo

Marsh Road Station Building ndash incorporating transmission and distribution functions all in one集輸配電功能於一身的馬師道電站

港燈為香港島及南丫島提供電力服務電力由南丫

發電廠生產後以極高電壓 mdash 275千伏特及132

千伏特 mdash 經輸電系統輸往不同的負荷中心然後

透過輸送網絡以較低的電壓分配至客戶由發電

廠輸送電力往各負荷中心的過程統稱為「輸電」

而由負荷中心配電至客戶樓宇則稱為「配電」

11

Transmission System

Power generated at LPS is transmitted to the major load centres on Hong Kong Island via the transmission network which comprises mainly 275kV and 132kV underground and submarine cables At present there are only a few 132kV overhead lines remaining in the system In the major load centres where the transmission circuit ends large capacity transformers are used to step down the voltage to 11kV or 22kV before distribution to customer substations

The use of underground cables in the transmission system ensures supply reliability even in inclement weather such as typhoon and is ideal for a densely loaded area like Hong Kong In addition to burying the cables directly underground six dedicated cable tunnels have also been built to house the transmission cables Besides reducing the chances of cable damage under adverse weather the use of underground cables and cable tunnels also eliminates visual intrusion and obstruction to land developments thus helping to preserve the environment

輸電系統 南丫發電廠生產的電力經由輸電網輸往港島各主要

負荷中心並以 275千伏特及 132千伏特地底電纜

及海底電纜輸送現時只有少數 132千伏特架空電

纜仍保留在系統中在主要負荷中心的輸電路末

端則會以大容量的變壓器把電力再降壓至 11千

伏特或 22千伏特然後才分配至客戶變電站

輸電系統使用地底電纜即使在惡劣天氣如颱風

下仍可確保電力供應穩定而且對於負載密度高

如香港的地區非常適用此外港燈除將電纜埋藏

於地底外更特別建造六條電纜隧道用以敷設輸電

纜地底電纜及電纜隧道不但可減低因惡劣天氣

對電纜可能造成的損毀外更不會影響視覺美觀

又能避免防礙土地發展因而有助保護環境

2

275kV Cable System

In HK Electricrsquos transmission system the 275kV network consists of mainly fluid-filled cables while Cross-Linked Polyethylene (XLPE) cables are mainly used inside substations There are several 550MVA circuits connecting the Lamma Power Station with Hong Kong Island These circuits are partly on land and partly under the sea

In the land section single core 275kV Kraft paper fluid-filled cables are used and buried underground In the submarine section the cables which take separate routes across the East Lamma Channel have been installed by jet and cover method to achieve a burial depth of 35 metres in the seabed There are over 60 nos of 275kV cable circuits with a total circuit length of about 170km

Six dedicated cable tunnels have been built to accommodate some of the 275kV fluid-filled cable circuits

HK Electricrsquos Cable Tunnels 港燈的電纜隧道

Connecting Wah Fu and Bowen 連接華富和寶雲

31km公里

Commissioned in 1988於一九八八年啟用

Connecting Nam Fung Road and Mount Parker 連接南風道和柏架山

57km公里

Commissioned in 1993於一九九三年啟用

Connecting Tin Wan and Wah Fu 連接田灣和華富

08km公里

Commissioned in 1999於一九九九年啟用

Connecting Cyberport and Wah Fu Cable Tunnel 連接數碼港和華富

08km公里

Commissioned in 2002於二零零二年啟用

Yung Shue W an榕樹灣

02km公里

Commissioned in 2006於二零零六年啟用

Pak Kok T sui北角嘴

01km公里

Commissioned in 2006於二零零六年啟用

275千伏特電纜系統

港燈輸電系統的最高輸電電壓為 275千伏特電纜

網絡大多採用充液式電纜 275千伏特交聯聚乙烯

電纜也大多應用於變電站內目前有多條 550兆伏

安電路連接南丫發電廠及香港島均敷設於地底

而其中一段則埋於海底

Cross section of 275kV fluid-filled PPLP insulated cable 275千伏充油聚丙烯薄膜夾心牛皮紙絕緣電纜的橫切面

敷設於地底的電纜為 275千伏特單芯牛皮紙充液

式電纜海底電纜以不同路線橫跨東博寮海峽

利用水力噴射覆蓋方法將電纜埋藏於海床下

35公尺港燈現有超過六十條 275千伏特電纜電

路總長度約一百七十公里

為方便敷設部份 275千伏特充液式電纜電路公司

特別建造六條電纜隧道

3

Routine inspection on SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

例行檢查

4

Electricity transmitted at 275kV is stepped down to 132kV by supergrid transformers each rated at 365MVA The 132kV network predominately comprises fluid-filled cables and the total circuit length is about 290km There are over 100 132kV Kraft paper fluid-filled cable circuits which are of single core or three core design with conductor sizes between 194 to 2000mm2 One important feature of the 132kV network is the use of 132kV Ring Main Units (RMU) in the zone substations to allow zone transformers to be teed off along the route of 132kV cable interconnecting circuits

For cable circuits inside substations 132kV Cross-Linked Polyethylene (XLPE) single core cables are extensively used There are also XLPE cable circuits installed with prefabricated joints at 132kV level and 132kV XLPE submarine cablesrsquo circuits installed in the network The total route length for 132kV XLPE cable is about 27km

The Company has not constructed any new transmission overhead line circuits since 1969 At present only a few 132kV overhead line circuits remain in the system with a total route length of about 25km

132kV Cable System

132千伏特 電纜系統

以275千伏特輸送的電力由 365兆伏安超高壓變壓

器降低至 132千伏特港燈的 132千伏特電纜網絡

主要採用充液式電纜線路總長度約為二百九十公

里網絡超過一百條 132千伏特牛皮紙充液式電纜

電路電纜均採用單芯或三芯設計導體面積介乎

一百九十四至二千平方毫米電纜網絡的其中一

項主要特色為分區變電站採用 132千伏特環迴開關

裝置使分區變壓器與 132千伏特電纜網絡互相連

接以分流方式提供電力

變電站內的電纜電路廣泛採用單芯交聯聚乙烯電

纜系統內更敷設使用預製式中間接頭的 132千伏

特的交聯聚乙烯電纜電路和 132千伏特交聯聚乙烯

海底電纜電路在 132千伏特的電纜系統內該種

電纜的總長度約為二十七公里

自一九六九年開始公司已不再興建新的架空輸電

纜現時的輸電系統內只餘下少數 132千伏特架空

電纜總長度約為二十五公里

Zone Substations

5

Most of the electricity on Hong Kong Island is consumed in the narrow strip along the northern shore of the Island with electrical power density in excess of 260MVAkm2 To bridge between transmission and distribution zone transformers which step down the voltage from 275kV or 132kV to 22kV or 11kV have to be installed in zone substations Zone substations with a total installed capacity of about 5100MVA are in service

Before 1989 four zone transformers with maximum continuous rating of 40MVA each were installed in one zone substation Due to the extreme difficulty and long time span in acquiring new substation sites in the urban areas a decision was made in 1987 to increase the zone substation capacity to 4 x 60MVA

Cyberport Station Building數碼港電站

Shaukeiwan Station Building houses the first oil-free zone

substation in our system筲箕灣電站內建有港燈首個完全

不含油的分區變電站

分區變電站 香港島主要耗電地區位於北面沿海之狹長地帶以

每平方公里計算耗電量密度逾 260兆伏安為連

接輸電及配電網絡公司於分區變電站設置變壓

器將電壓由 275千伏特或 132千伏特降低至 22千

伏特或 11千伏特分區變電站的總安裝容量約為

5100兆伏安

一九八九年前公司於每個分區變電站裝設四個最

高連續操作量每個為 40兆伏安的變壓器由於市

區內極難尋找適當的地方加上申請興建變電站耗

時甚久公司於一九八七年遂決定將分區變電站的

負荷量增至 4 x 60 兆伏安

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Transmission System

Power generated at LPS is transmitted to the major load centres on Hong Kong Island via the transmission network which comprises mainly 275kV and 132kV underground and submarine cables At present there are only a few 132kV overhead lines remaining in the system In the major load centres where the transmission circuit ends large capacity transformers are used to step down the voltage to 11kV or 22kV before distribution to customer substations

The use of underground cables in the transmission system ensures supply reliability even in inclement weather such as typhoon and is ideal for a densely loaded area like Hong Kong In addition to burying the cables directly underground six dedicated cable tunnels have also been built to house the transmission cables Besides reducing the chances of cable damage under adverse weather the use of underground cables and cable tunnels also eliminates visual intrusion and obstruction to land developments thus helping to preserve the environment

輸電系統 南丫發電廠生產的電力經由輸電網輸往港島各主要

負荷中心並以 275千伏特及 132千伏特地底電纜

及海底電纜輸送現時只有少數 132千伏特架空電

纜仍保留在系統中在主要負荷中心的輸電路末

端則會以大容量的變壓器把電力再降壓至 11千

伏特或 22千伏特然後才分配至客戶變電站

輸電系統使用地底電纜即使在惡劣天氣如颱風

下仍可確保電力供應穩定而且對於負載密度高

如香港的地區非常適用此外港燈除將電纜埋藏

於地底外更特別建造六條電纜隧道用以敷設輸電

纜地底電纜及電纜隧道不但可減低因惡劣天氣

對電纜可能造成的損毀外更不會影響視覺美觀

又能避免防礙土地發展因而有助保護環境

2

275kV Cable System

In HK Electricrsquos transmission system the 275kV network consists of mainly fluid-filled cables while Cross-Linked Polyethylene (XLPE) cables are mainly used inside substations There are several 550MVA circuits connecting the Lamma Power Station with Hong Kong Island These circuits are partly on land and partly under the sea

In the land section single core 275kV Kraft paper fluid-filled cables are used and buried underground In the submarine section the cables which take separate routes across the East Lamma Channel have been installed by jet and cover method to achieve a burial depth of 35 metres in the seabed There are over 60 nos of 275kV cable circuits with a total circuit length of about 170km

Six dedicated cable tunnels have been built to accommodate some of the 275kV fluid-filled cable circuits

HK Electricrsquos Cable Tunnels 港燈的電纜隧道

Connecting Wah Fu and Bowen 連接華富和寶雲

31km公里

Commissioned in 1988於一九八八年啟用

Connecting Nam Fung Road and Mount Parker 連接南風道和柏架山

57km公里

Commissioned in 1993於一九九三年啟用

Connecting Tin Wan and Wah Fu 連接田灣和華富

08km公里

Commissioned in 1999於一九九九年啟用

Connecting Cyberport and Wah Fu Cable Tunnel 連接數碼港和華富

08km公里

Commissioned in 2002於二零零二年啟用

Yung Shue W an榕樹灣

02km公里

Commissioned in 2006於二零零六年啟用

Pak Kok T sui北角嘴

01km公里

Commissioned in 2006於二零零六年啟用

275千伏特電纜系統

港燈輸電系統的最高輸電電壓為 275千伏特電纜

網絡大多採用充液式電纜 275千伏特交聯聚乙烯

電纜也大多應用於變電站內目前有多條 550兆伏

安電路連接南丫發電廠及香港島均敷設於地底

而其中一段則埋於海底

Cross section of 275kV fluid-filled PPLP insulated cable 275千伏充油聚丙烯薄膜夾心牛皮紙絕緣電纜的橫切面

敷設於地底的電纜為 275千伏特單芯牛皮紙充液

式電纜海底電纜以不同路線橫跨東博寮海峽

利用水力噴射覆蓋方法將電纜埋藏於海床下

35公尺港燈現有超過六十條 275千伏特電纜電

路總長度約一百七十公里

為方便敷設部份 275千伏特充液式電纜電路公司

特別建造六條電纜隧道

3

Routine inspection on SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

例行檢查

4

Electricity transmitted at 275kV is stepped down to 132kV by supergrid transformers each rated at 365MVA The 132kV network predominately comprises fluid-filled cables and the total circuit length is about 290km There are over 100 132kV Kraft paper fluid-filled cable circuits which are of single core or three core design with conductor sizes between 194 to 2000mm2 One important feature of the 132kV network is the use of 132kV Ring Main Units (RMU) in the zone substations to allow zone transformers to be teed off along the route of 132kV cable interconnecting circuits

For cable circuits inside substations 132kV Cross-Linked Polyethylene (XLPE) single core cables are extensively used There are also XLPE cable circuits installed with prefabricated joints at 132kV level and 132kV XLPE submarine cablesrsquo circuits installed in the network The total route length for 132kV XLPE cable is about 27km

The Company has not constructed any new transmission overhead line circuits since 1969 At present only a few 132kV overhead line circuits remain in the system with a total route length of about 25km

132kV Cable System

132千伏特 電纜系統

以275千伏特輸送的電力由 365兆伏安超高壓變壓

器降低至 132千伏特港燈的 132千伏特電纜網絡

主要採用充液式電纜線路總長度約為二百九十公

里網絡超過一百條 132千伏特牛皮紙充液式電纜

電路電纜均採用單芯或三芯設計導體面積介乎

一百九十四至二千平方毫米電纜網絡的其中一

項主要特色為分區變電站採用 132千伏特環迴開關

裝置使分區變壓器與 132千伏特電纜網絡互相連

接以分流方式提供電力

變電站內的電纜電路廣泛採用單芯交聯聚乙烯電

纜系統內更敷設使用預製式中間接頭的 132千伏

特的交聯聚乙烯電纜電路和 132千伏特交聯聚乙烯

海底電纜電路在 132千伏特的電纜系統內該種

電纜的總長度約為二十七公里

自一九六九年開始公司已不再興建新的架空輸電

纜現時的輸電系統內只餘下少數 132千伏特架空

電纜總長度約為二十五公里

Zone Substations

5

Most of the electricity on Hong Kong Island is consumed in the narrow strip along the northern shore of the Island with electrical power density in excess of 260MVAkm2 To bridge between transmission and distribution zone transformers which step down the voltage from 275kV or 132kV to 22kV or 11kV have to be installed in zone substations Zone substations with a total installed capacity of about 5100MVA are in service

Before 1989 four zone transformers with maximum continuous rating of 40MVA each were installed in one zone substation Due to the extreme difficulty and long time span in acquiring new substation sites in the urban areas a decision was made in 1987 to increase the zone substation capacity to 4 x 60MVA

Cyberport Station Building數碼港電站

Shaukeiwan Station Building houses the first oil-free zone

substation in our system筲箕灣電站內建有港燈首個完全

不含油的分區變電站

分區變電站 香港島主要耗電地區位於北面沿海之狹長地帶以

每平方公里計算耗電量密度逾 260兆伏安為連

接輸電及配電網絡公司於分區變電站設置變壓

器將電壓由 275千伏特或 132千伏特降低至 22千

伏特或 11千伏特分區變電站的總安裝容量約為

5100兆伏安

一九八九年前公司於每個分區變電站裝設四個最

高連續操作量每個為 40兆伏安的變壓器由於市

區內極難尋找適當的地方加上申請興建變電站耗

時甚久公司於一九八七年遂決定將分區變電站的

負荷量增至 4 x 60 兆伏安

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

275kV Cable System

In HK Electricrsquos transmission system the 275kV network consists of mainly fluid-filled cables while Cross-Linked Polyethylene (XLPE) cables are mainly used inside substations There are several 550MVA circuits connecting the Lamma Power Station with Hong Kong Island These circuits are partly on land and partly under the sea

In the land section single core 275kV Kraft paper fluid-filled cables are used and buried underground In the submarine section the cables which take separate routes across the East Lamma Channel have been installed by jet and cover method to achieve a burial depth of 35 metres in the seabed There are over 60 nos of 275kV cable circuits with a total circuit length of about 170km

Six dedicated cable tunnels have been built to accommodate some of the 275kV fluid-filled cable circuits

HK Electricrsquos Cable Tunnels 港燈的電纜隧道

Connecting Wah Fu and Bowen 連接華富和寶雲

31km公里

Commissioned in 1988於一九八八年啟用

Connecting Nam Fung Road and Mount Parker 連接南風道和柏架山

57km公里

Commissioned in 1993於一九九三年啟用

Connecting Tin Wan and Wah Fu 連接田灣和華富

08km公里

Commissioned in 1999於一九九九年啟用

Connecting Cyberport and Wah Fu Cable Tunnel 連接數碼港和華富

08km公里

Commissioned in 2002於二零零二年啟用

Yung Shue W an榕樹灣

02km公里

Commissioned in 2006於二零零六年啟用

Pak Kok T sui北角嘴

01km公里

Commissioned in 2006於二零零六年啟用

275千伏特電纜系統

港燈輸電系統的最高輸電電壓為 275千伏特電纜

網絡大多採用充液式電纜 275千伏特交聯聚乙烯

電纜也大多應用於變電站內目前有多條 550兆伏

安電路連接南丫發電廠及香港島均敷設於地底

而其中一段則埋於海底

Cross section of 275kV fluid-filled PPLP insulated cable 275千伏充油聚丙烯薄膜夾心牛皮紙絕緣電纜的橫切面

敷設於地底的電纜為 275千伏特單芯牛皮紙充液

式電纜海底電纜以不同路線橫跨東博寮海峽

利用水力噴射覆蓋方法將電纜埋藏於海床下

35公尺港燈現有超過六十條 275千伏特電纜電

路總長度約一百七十公里

為方便敷設部份 275千伏特充液式電纜電路公司

特別建造六條電纜隧道

3

Routine inspection on SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

例行檢查

4

Electricity transmitted at 275kV is stepped down to 132kV by supergrid transformers each rated at 365MVA The 132kV network predominately comprises fluid-filled cables and the total circuit length is about 290km There are over 100 132kV Kraft paper fluid-filled cable circuits which are of single core or three core design with conductor sizes between 194 to 2000mm2 One important feature of the 132kV network is the use of 132kV Ring Main Units (RMU) in the zone substations to allow zone transformers to be teed off along the route of 132kV cable interconnecting circuits

For cable circuits inside substations 132kV Cross-Linked Polyethylene (XLPE) single core cables are extensively used There are also XLPE cable circuits installed with prefabricated joints at 132kV level and 132kV XLPE submarine cablesrsquo circuits installed in the network The total route length for 132kV XLPE cable is about 27km

The Company has not constructed any new transmission overhead line circuits since 1969 At present only a few 132kV overhead line circuits remain in the system with a total route length of about 25km

132kV Cable System

132千伏特 電纜系統

以275千伏特輸送的電力由 365兆伏安超高壓變壓

器降低至 132千伏特港燈的 132千伏特電纜網絡

主要採用充液式電纜線路總長度約為二百九十公

里網絡超過一百條 132千伏特牛皮紙充液式電纜

電路電纜均採用單芯或三芯設計導體面積介乎

一百九十四至二千平方毫米電纜網絡的其中一

項主要特色為分區變電站採用 132千伏特環迴開關

裝置使分區變壓器與 132千伏特電纜網絡互相連

接以分流方式提供電力

變電站內的電纜電路廣泛採用單芯交聯聚乙烯電

纜系統內更敷設使用預製式中間接頭的 132千伏

特的交聯聚乙烯電纜電路和 132千伏特交聯聚乙烯

海底電纜電路在 132千伏特的電纜系統內該種

電纜的總長度約為二十七公里

自一九六九年開始公司已不再興建新的架空輸電

纜現時的輸電系統內只餘下少數 132千伏特架空

電纜總長度約為二十五公里

Zone Substations

5

Most of the electricity on Hong Kong Island is consumed in the narrow strip along the northern shore of the Island with electrical power density in excess of 260MVAkm2 To bridge between transmission and distribution zone transformers which step down the voltage from 275kV or 132kV to 22kV or 11kV have to be installed in zone substations Zone substations with a total installed capacity of about 5100MVA are in service

Before 1989 four zone transformers with maximum continuous rating of 40MVA each were installed in one zone substation Due to the extreme difficulty and long time span in acquiring new substation sites in the urban areas a decision was made in 1987 to increase the zone substation capacity to 4 x 60MVA

Cyberport Station Building數碼港電站

Shaukeiwan Station Building houses the first oil-free zone

substation in our system筲箕灣電站內建有港燈首個完全

不含油的分區變電站

分區變電站 香港島主要耗電地區位於北面沿海之狹長地帶以

每平方公里計算耗電量密度逾 260兆伏安為連

接輸電及配電網絡公司於分區變電站設置變壓

器將電壓由 275千伏特或 132千伏特降低至 22千

伏特或 11千伏特分區變電站的總安裝容量約為

5100兆伏安

一九八九年前公司於每個分區變電站裝設四個最

高連續操作量每個為 40兆伏安的變壓器由於市

區內極難尋找適當的地方加上申請興建變電站耗

時甚久公司於一九八七年遂決定將分區變電站的

負荷量增至 4 x 60 兆伏安

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Routine inspection on SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

例行檢查

4

Electricity transmitted at 275kV is stepped down to 132kV by supergrid transformers each rated at 365MVA The 132kV network predominately comprises fluid-filled cables and the total circuit length is about 290km There are over 100 132kV Kraft paper fluid-filled cable circuits which are of single core or three core design with conductor sizes between 194 to 2000mm2 One important feature of the 132kV network is the use of 132kV Ring Main Units (RMU) in the zone substations to allow zone transformers to be teed off along the route of 132kV cable interconnecting circuits

For cable circuits inside substations 132kV Cross-Linked Polyethylene (XLPE) single core cables are extensively used There are also XLPE cable circuits installed with prefabricated joints at 132kV level and 132kV XLPE submarine cablesrsquo circuits installed in the network The total route length for 132kV XLPE cable is about 27km

The Company has not constructed any new transmission overhead line circuits since 1969 At present only a few 132kV overhead line circuits remain in the system with a total route length of about 25km

132kV Cable System

132千伏特 電纜系統

以275千伏特輸送的電力由 365兆伏安超高壓變壓

器降低至 132千伏特港燈的 132千伏特電纜網絡

主要採用充液式電纜線路總長度約為二百九十公

里網絡超過一百條 132千伏特牛皮紙充液式電纜

電路電纜均採用單芯或三芯設計導體面積介乎

一百九十四至二千平方毫米電纜網絡的其中一

項主要特色為分區變電站採用 132千伏特環迴開關

裝置使分區變壓器與 132千伏特電纜網絡互相連

接以分流方式提供電力

變電站內的電纜電路廣泛採用單芯交聯聚乙烯電

纜系統內更敷設使用預製式中間接頭的 132千伏

特的交聯聚乙烯電纜電路和 132千伏特交聯聚乙烯

海底電纜電路在 132千伏特的電纜系統內該種

電纜的總長度約為二十七公里

自一九六九年開始公司已不再興建新的架空輸電

纜現時的輸電系統內只餘下少數 132千伏特架空

電纜總長度約為二十五公里

Zone Substations

5

Most of the electricity on Hong Kong Island is consumed in the narrow strip along the northern shore of the Island with electrical power density in excess of 260MVAkm2 To bridge between transmission and distribution zone transformers which step down the voltage from 275kV or 132kV to 22kV or 11kV have to be installed in zone substations Zone substations with a total installed capacity of about 5100MVA are in service

Before 1989 four zone transformers with maximum continuous rating of 40MVA each were installed in one zone substation Due to the extreme difficulty and long time span in acquiring new substation sites in the urban areas a decision was made in 1987 to increase the zone substation capacity to 4 x 60MVA

Cyberport Station Building數碼港電站

Shaukeiwan Station Building houses the first oil-free zone

substation in our system筲箕灣電站內建有港燈首個完全

不含油的分區變電站

分區變電站 香港島主要耗電地區位於北面沿海之狹長地帶以

每平方公里計算耗電量密度逾 260兆伏安為連

接輸電及配電網絡公司於分區變電站設置變壓

器將電壓由 275千伏特或 132千伏特降低至 22千

伏特或 11千伏特分區變電站的總安裝容量約為

5100兆伏安

一九八九年前公司於每個分區變電站裝設四個最

高連續操作量每個為 40兆伏安的變壓器由於市

區內極難尋找適當的地方加上申請興建變電站耗

時甚久公司於一九八七年遂決定將分區變電站的

負荷量增至 4 x 60 兆伏安

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Zone Substations

5

Most of the electricity on Hong Kong Island is consumed in the narrow strip along the northern shore of the Island with electrical power density in excess of 260MVAkm2 To bridge between transmission and distribution zone transformers which step down the voltage from 275kV or 132kV to 22kV or 11kV have to be installed in zone substations Zone substations with a total installed capacity of about 5100MVA are in service

Before 1989 four zone transformers with maximum continuous rating of 40MVA each were installed in one zone substation Due to the extreme difficulty and long time span in acquiring new substation sites in the urban areas a decision was made in 1987 to increase the zone substation capacity to 4 x 60MVA

Cyberport Station Building數碼港電站

Shaukeiwan Station Building houses the first oil-free zone

substation in our system筲箕灣電站內建有港燈首個完全

不含油的分區變電站

分區變電站 香港島主要耗電地區位於北面沿海之狹長地帶以

每平方公里計算耗電量密度逾 260兆伏安為連

接輸電及配電網絡公司於分區變電站設置變壓

器將電壓由 275千伏特或 132千伏特降低至 22千

伏特或 11千伏特分區變電站的總安裝容量約為

5100兆伏安

一九八九年前公司於每個分區變電站裝設四個最

高連續操作量每個為 40兆伏安的變壓器由於市

區內極難尋找適當的地方加上申請興建變電站耗

時甚久公司於一九八七年遂決定將分區變電站的

負荷量增至 4 x 60 兆伏安

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Envi-

ronm

ental

ly

Frien

dly 高效率

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點Low Noise

低噪音55

dBA

分貝

環保

Mini

mal

Main

tance

只須少量

維修

HighlyEfficient

SF6 Gas Insulated Zone Transformers

The first 13211kV 60MVA SF6 gas insulated zone transformer was commissioned in November 1991 ten years after the first SF6 gas insulated distribution transformer was commissioned in the network With the favourable performance of the earlier units the Company has decided to switch over to gas insulated zone transformer for new projects and for replacement There are now over 75 nos of gas insulated zone transformers of rating 30 40 50 and 60MVA in the system

The gas zone transformers are filled with SF6

gas at 14kgcm2 G at 20ordmC The HV cable box and on-load tap changer are also SF6 gas insulated Polyphenylene Sulphide Film (PPS

Film) is used as conductor insulation material of coil in these transformers PPS Film has a better performance because of its higher thermal withstand capability of about 165-170ordmC

Force circulation of SF6 gas by gas blower is required when the transformer top gas temperature reaches above 55ordmC Four gas blowers each rated at 37kW are required for each 60MVA gas transformer

With the introduction of gas transformer SF6

and vacuum circuit breaker and XLPE cable totally oil-free zone substation is possible and first realised in Shaukeiwan Zone Substation in 1992

Benefits of SF6 Gas Insulated Zone Transformers六氟化硫氣體絕緣分區變電站變壓器的優點

Minimal Maintenance只需少量維修

Low Noise低噪音

55dBA分貝

Highly Efficient高效率

SF6 gas insulated switchgear六氟化硫氣體絕緣開關裝置

Routine inspection on zone transformer分區變電站變壓器例行檢查

六氟化硫氣體絕緣分區變電站變壓器

港燈繼一九八一年採用首部六氟化硫氣體絕緣配電

變壓器後首個 13211千伏特的 60兆伏安六氟

化硫氣體絕緣分區變電站變壓器於一九九一年十一

月投入服務由於此等變壓器表現理想公司已決

定在新的發展工程或更換舊有變壓器時改用六氟

化硫氣體絕緣變壓器至今超過七十五個分別為

304050及60兆伏安氣體絕緣分區變電站變壓

器已先後投入服務

分區變電站的氣體絕緣變壓器注有六氟化硫氣體

其壓力於溫度攝氏 20度時為每平方公分 14公斤

高壓電纜箱及調壓分接亦以六氟化硫氣體絕緣

由於聚苯硫醚薄膜的耐熱能力可高達攝氏 165度

至170度變壓器均以聚苯硫醚薄膜為導體絕緣

物料

當變壓器的頂部氣體溫度達攝氏 55度以上必須

利用吹風機將變壓器內之六氟化硫氣體作循環運

行每部 60兆伏安氣體絕緣變壓器都具有四個 37

千瓦的吹風機

公司更率先採用氣體絕緣變壓器六氟化硫及真空

斷路器和交聯聚乙烯電纜於一九九二年在筲箕灣

建成首個完全不含油的分區變電站

6

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

7

Distribution System

Electricity is distributed at 11kV and 22kV to over 3700 distribution substations on Hong Kong Island and Lamma Island Voltage is further stepped down to 380V 3-phase or 220V single-phase and supplied via the low voltage underground cable system to customers Distribution substations are equipped with remote control and monitoring facilities so that operation of switchgear and auxiliary equipment can be activated remotely from the System Control Centre located at Apleichau The condition of distribution substations is also continuously monitored at

the control centre For faults on the 22kV 11kV distribution cable network restoration of supply is achieved remotely from the control centre and is normally carried out within a few minutes of a supply interruption

For electricity supply which cannot be remotely restored at the control centre emergency repair teams are despatched to the scene from the Operations Department which is manned round-the-clock to respond to customersrsquo calls on power interruptions On average the response time in urban areas is less than 28 minutes

System Control Centre系統控制中心

配電系統 電力是以 11千伏特及 22千伏特電壓輸送至港島及

南丫島合共超過三千七百個配電變電站在此階段

將電壓再降至 380伏特三相或 220伏特單相經由

地底電纜系統以低電壓供電予客戶配電變電站內

安裝遠動系統及監察設備以便能夠由鴨脷洲的系

統控制中心靈活遙控變電站內開關及輔助設備的操

作同時配電變電站的情況亦由控制中心加以監

察當 22千伏特 11千伏特配電網出現故障時

可由控制中心遙控恢復供電通常可在停電數分鐘

內完成

若電力系統未能透過控制中心遙控恢復供電時

營運部便會派出緊急搶修組人員到達現場搶修營

運部人員二十四小時當值處理客戶因電力中斷的

緊急召喚市區內平均到達現場的時間少於二十八

分鐘

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

22kV 11kV Distribution Network

HK Electricrsquos 22kV 11kV network comprises cables buried directly underground The total length of cables is over 3500km The Company has adopted the use of XLPE insulation for all its cables since 1980 As a standard all cables use 240mm2 300mm2

copper conductor with corrugated aluminium metal sheathsteel wire armour and PVC MDPE outer-jacket

Electricity supply network at 22kV 11kV level is in the form of a closed or an open ring Any 22kV 11kV substation is normally fed from one source zone substation Alternative route is always available from another source substation in case of fault or cable taken out of service

The total length of underground cables in the distribution network is over 配電網絡內地底電纜的總長度超過

3500km公里

132kV Ring Main Units 132千伏特環迴開關裝置

High a cables高壓電纜

22千伏特11千伏特配電網絡

港燈 11千伏特及 22千伏特配電網絡的電纜均埋藏

於地底網絡內地底電纜的總長度超過三千五百

公里自一九八零年開始所有電纜均採用交聯

聚乙烯為絕緣物料電纜皆具有同一標準採用

240平方毫米 300平方毫米的銅導體配以波紋

形鋁金屬外殼鋼絲護甲和聚氯乙烯中密度聚

乙烯護套

22千伏特 11千伏特配電網絡以閉合或開放環形

方式供電正常情況下一個 22千伏特 11千伏

特變電站的電力由一個分區變電站供電遇有電纜

停用或其他故障電力會隨即由另一分區變電站

供應

8

9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

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9

Distribution Automation

HK Electricrsquos distribution automation can be dated back to 1979 when the first 120 distribution substations were equipped with Remote Terminal Units (RTUs) Through RTUs supervisory control and data acquisition of the distribution substation has been made possible from the centralised computer installed in the System Control Centre All permanent substations in the 22kV 11kV network are installed with RTUs and

communication with the distribution computer is through dedicated in-house communication channels Through the distribution computer the operation of 11kV and 22kV switchgear can be initiated remotely The RTU also monitors the loading voltage and temperature of transformers inside the substation continuously Monitoring is actually extended down to the loading of all low voltage cables

Routine inspection例行檢查

配電自動化 港燈採用配電自動化操作可追溯至一九七九年當

時在首批一百二十個配電變電站裝置遠動終端機

透過遠動終端機系統控制中心的中央電腦可以

監察控制及索取配電變電站的資料所有 11千伏

特及 22千伏特系統內的固定配電變電站均裝設有

遠動終端機利用特設的通訊線路連接負責配電

的電腦系統使用遠動終端機不單可以遙控啟動

11千伏特及 22千伏特變電站的高壓開關掣更可

以不停監察變電站內變壓器的負荷電壓和溫度

事實上監察的範圍已伸延至所有低壓電纜的負

荷數據

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Oil-Free Distribution Substations

Completely oil-free distribution substations have been introduced since the early 1980s By the end of 1995 all oil insulated switchgear inside permanent substations have been replaced At present over 90 of our substations in the system are oil-free distribution substations It was made possible by the large scale application of SF6 gas insulated distribution transformers air and SF6 gas insulated ring main units and the use of XLPE cables

Completely oil-free distribution substations greatly reduce potential fire hazards associated with electrical apparatus As a result substations can be installed on upper floors of a building The highest distribution substation on Hong Kong Island is located at International Finance Centre Two (IFC2) at a height of 293 metres above ground

Routine

inspection on SF6 gas system

六氟化硫氣體系統例行檢查

The highest distribution substation on Hong Kong Island is located at IFC2最高的港燈配電變電站位於國際金融中心二期

10

不含油配電 變電站

由於公司大規模採用六氟化硫氣體絕緣配電變壓

器空氣六氟化硫氣體絕緣環迴開關裝置和交聯

聚乙烯電纜所以公司於一九八零年代初期已開

始使用完全不含油的配電變電站於一九九五年

年底所有永久性配電變電站內的充油式絕緣開

關已完全替換現時超過百分之九十為不含油的變

電站

完全不含油的配電變電站大大減低因電力裝置故障

而可能引起火警的風險因此變電站能設置於樓

宇內高層目前全港島最高的配電變電站位於國際

金融中心二期離地面二百九十三公尺

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Monitoring the System

To ensure maximum security of supply to customers HK Electricrsquos transmission and distribution network is monitored and maintained by a team of well-trained and experienced engineers who are tasked to look after emergency repairs maintenance and the developments of all networks

The System Control Centre through an on-line system computer maintains a 24-hour surveillance and exercises remote control over the transmission and distribution system ensuring a reliable and efficient supply of electricity to our customers

Communication System

To maintain an effective and efficient operation of the transmission and distribution network HK Electric has installed a comprehensive state-of-the-art communication system The communication system includes a digital microwave radio and optical fibrepilot cable network for supervisory control and remote

data acquisition system of all the transmission and distribution substations terrestrial trunked radio communication for site activities digital PAX exchanges for internal and external communication In addition there is a computer telephone integration system for efficient handling of customersrsquo enquiries

Routine inspection例行檢查

Mobile generator流動發電機車

Our team of well-trained and experienced engineers

港燈擁有精良及具豐富經驗的工程師團隊

監察系統 為確保電力供應維持高度穩定港燈的輸電及配電

系統由一隊訓練精良及具豐富經驗的工程師負責監

察與保養工作包括搶修維修及發展所有網絡

同時公司的系統控制中心亦透過在線系統電腦作

二十四小時監察以及遙控整個輸電及配電系統的

操作從而確保電力在高度穩定及高效率下輸送予

客戶

通訊系統 為維持有效率及高效能的輸配電網絡運作以保

障客戶利益港燈安裝一套設備周全的先進通訊

系統通訊系統包括數碼微波無線電及光導纖維

網絡導線電纜以監察控制及遙控獲取所有輸配

電分站的數據資料還有供在工地使用的數碼幹線

無線電通訊系統及供對內及對外通訊用的數碼電話

交換系統此外公司亦裝設電腦電話綜合系統

為客戶提供更快捷的查詢服務

11

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14

Green Features

HK Electric has implemented various environmental initiatives in our substations The Marsh Road Station Building was designed with the concept of promoting sustainable development Commissioned in 2008 the building features a number of green features including a rooftop garden to lower room temperatures thereby reducing the need for air-conditioning One micro wind turbines and 30 solar photovoltaic panels were also installed to generate green electricity for the premises To conserve water resources a rainwater collection tank was built for watering plants in the garden

Noise level at our substations is also kept to the minimum through extensive use of low noise equipment such as transformers and substation ventilation fans For all major projects noise assessment studies are carried out to limit the noise levels during the construction and operation

Rooftop garden at Marsh Road Station Building馬師道電站天台上的空中花園

Micro wind turbines小型風力發電機組

Solar photovoltaic panels太陽能光伏板

環保設施 為保護環境港燈在變電站內加入了不少環保設

施馬師道電站便是首個以「全方位可持續發展」

概念設計的電站於二零零八年正式啟用站內加

入了不少環保及節能設施例如天台的空中花園有

助降低室溫節省空調的耗電量另外天台亦安

裝了一台小型風力發電機組和三十塊太陽能光伏

板為電站提供零排放的綠色電力而在節省用水

方面天台亦設有水缸收集雨水用以灌溉站內的

樹木和草地

為確保輸配電系統內的音量水平減至最低港燈電

站均廣泛使用低噪音的裝置如變壓器及電站內的抽

氣扇而所有大型工程均會作出噪音評估以限制工

程在興建階段及完成運作時的音量水平

wwwhkelectriccom 1212

01

20

14