chuyen de role tram 6-2008.doc

Li ni u

Cng ty C Phn Thu in A Vng Chuyn rle trm 220kV

Li ni u

Trong x hi hin i ngun nng lng ng vai tr rt quan trng trong vic pht trin kinh t v nhu cu sinh hot ca con ngi. Cc ngun nng lng thng dng gm: du m, than , in nng..trong ngun nng lng in chim mt t trng ln gi vai tr rt quan trng. Cng vi s pht trin ngy cng tng ca nn kinh t, i hi ngun nng lng phi c pht trin khng ngng v c bit phi i trc mt bc so vi cc ngnh kinh t khc. pht trin ngun nng lng in cn m rng vic xy dng cc ng dy truyn ti in, cc trm bin p t bit l pht trin phn ngun thng qua vic xy dng cc nh my in.

Cc thit b in lm vic trong h thng i hi phi lun c thit b bo v i km. Cc thit b bo v ng vai tr nh ngi canh gc khng ngng mt mi m bo cho thit b c bo v lm vic an ton v kinh t ng thi cng gp phn tng cng n nh ca h thng thng qua vic loi tr nhanh chng im s c ra khi h thng bng cch xut lnh n c cu chp hnh l my ct.

Trc y cc thit b bo v l cc rle c in t, cc rle ny tn ti nhiu nhc im nh kch tht ln lm tng din tch v chi ph lp t, lm vic khng tin cy do qun tnh ln, n nh km v d h hng trong phn mch nh th v t tnh nng khng p ng c hu ht cc nhu cu cn bo v...

Ngy nay cng vi s pht trin ca khoa hc k thut cng ngh cc rle k thut s ra i khc phc c hu ht cc nhc im ca rle c in t. Nhng li ny sinh mt nhc im khc l cng ngh mi cn xa l vi ngi s dng gy kh khn trong vn lp t, vn hnh, bo tr, ci t cho cc thit b bo v. Chuyn rle bo v c bin son nhm mc ch b tr kin thc v rle s cho cc nhn vin lm vic trc tip hoc gin tip vi cc thit b bo v, phc v tch cc trong qu trnh vn hnh, x l s c v ci t cho cc thit b bo v

Bin Son

Hunh Nht Mn

Mai Th Hng Thng

Chng 1

M T H THNG RLE BO V

1.1- Khi qut

S ni in chnh ca nh my Thu in A Vng gm: hai t my pht cng sut 2x105MW, my pht ni b vi my bin p chnh (13.8/220kV cng sut 124MW) qua my ct u cc v dao cch ly 13.8kV. S trm 220kV ca nh my thy in A Vng l s t gic, hai pht tuyn u ra (Thnh M 1, Thnh M 2) ni n trm 220kV Thnh M. in t dng chnh ca mi t my ly t u cc my pht pha trn dao cch ly u cc qua my bin p t dng TD1(2) (13.8/0.4kV cng sut 1.5 MW). Kch t t my cng c ly t u cc my pht pha trn dao cch ly 13.8kV qua my bin p kch t TE1(2) ( 13.8/0.4kV cng sut 0.92MW). bo v cc thit b trong s nh my A Vng s dng rle ca hng SEL do M cung cp. C th:

- My pht s dng rle SEL-300G v SEL-501, SEL-387E.

- My bin p chnh v Thanh ci C21&C24 s dng rle SEL-387, SEL-351 v SEL-501.

- Bo v kt gin thanh ci s dng rle SEL-421.

- Bo v ng dy v Thanh ci C23&C22 s dng SEL-421&SEL-311L.

- Bo v my bin p t dng s dng SEL-501

- My bin p kch t s dng SEL- 501.

Chuyn rle bo v gii hn nghin cu t u ra ca cc hp u ni PT, CT theo cc ng dy cp a tn hiu n cc t bo v v s u dy ca cc PT, CT.

1.2- Chc nng

- Chc nng ca h thng rle bo v l chng c cc dng ngn mch v cc h hng trong ch vn hnh bnh thng ca cc thit b in trong h thng in.

- Cc chc nng khc nh:

+ T ng ng lp li.

+ Xa thi ph ti theo tn s....

1.3- Nhim v

1.3.1-Bo v thanh ci v kt gin

m bo cho thanh ci lm vic an ton v hiu qu khi xy ra cc hin tng khng bnh thng v s c nh ngn mch hoc qu ti ng thi m bo cho cc thit b lin quan vn duy tr trng thi cp in bnh thng bng cch a tn hiu i ct cc my ct lin quan c lp phn s c.

1.3.2- Bo v ng dy Nhm m bo cho ng dy vn hnh an ton, tin cy v hiu qu khi xy ra cc hin tng khng bnh thng v s c nh: st nh trc trc tip vo ng dy, ngn mch trn ng dy, h hng cc thit b u ni vo ng dy..ng thi duy tr trng thi cp in bnh thng cho cc thit b cn li c lin quan bng cch nhanh chng loi tr im s c thng qua vic ct cc my ct lin quan c lp im s c.

1.4- Cu to

1.4.1- Cu trc ca mt rle s in hnh

Hnh 1.4-Cu trc in hnh ca rle s

- Khi u vo gm TI, TU ly tn hiu a n cc Transducer bin i tn hiu u vo thnh cc tn hiu ph hp. Cc tn hiu ny c a qua b ly mu v gi mu S/H, cc mu sau khi ly c a vo b dn knh. u ra b chn knh a vo b bin i tng t s (ADC) bin i tn hiu tng t thnh tn hiu s a vo b vi x l.

- Tn hiu u ra ca b ADC by gi c th bin i tu bi b vi x l. Nhn chung trong mt rle s thng s dng nhiu b vi x l thc hin nhiu chc nng khc nhau, chn hn nh x l thut ton ca rle, thc hin cc php ton logic.... B vi x l c a vo ch lm vic theo chng trnh ci t sn trong b nh ROM, y l b nh khng thay i c v khng b mt d liu khi mt ngun. N so snh thng tin u vo vi cc gi tr t cha trong b nh EEPROM (b nh ch c, lp trnh in v xo c bng xung in). Cc php tnh trung gian c lu tr tm thi trong b nh RAM.

- cp ngun cho qu trnh hot ng ca rle ngi ta s dng mt modul ngun. Modul ngun ny c nhiu mc in p u vo tu thuc vo v tr ca cc Jumper trn bo mch ngun, chi tit v vic jump bo mch ngun xem s tay hng dn vn hnh cc SEL chng 2 phn lp t. Nhim v ca modul ny l bin i ngun mt chiu 48/110/220VDC thnh ngun mt chiu c nhiu cp in p ((15 V, (5 V ,(1 V, 0V) cung cp cho cc chc nng khc nhau ca rle. y l b bin i DC/DC vi u vo c ly t h thng in t dng 220Vdc ca chnh t my.

- Giao din ca rle s: Khng ging nh cc rle in c v cc rle in tnh khc, rle s hu nh khng cn hiu chnh. Vic ci t c tin hnh trn mt trc t rle bo v thng qua cc phm chc nng v mn hnh LCD trc t rle hoc s dng my tnh c nhn v phn mm chuyn dng ACSELERATOR QuickSet SEL-5030 kt ni vi cng RS232 trc mt t tin hnh ci t, xem thng s ci t v gim st tnh trng ca rle.

Hnh 1.4.2-Cng giao tip RS232, cc phm chc nng v mn hnh LCD

- Cu trc ca rle s m t di dng khi

Hnh 1.4.3- Cu trc khi ca rle s

- Trong :

+ Khi x l gm: b ly mu, gi mu b bin i A/D, cc b nh RAM, ROM, EFROM v CPU.

+ Khi ci t hin th gm mn hnh LCD, bn phm gm cc phm s v cc phm chc nng, mch iu khin.

+ Khi u ra gm cc tip im OUTn.

+ C cu chp hnh l my ct.

1.4.2- c im ca rle SEL

- Tiu th cng sut thp: B vi x l v mch ngoi vi ca n s dng IC MOS nn gp phn lm gim vic tiu t cng sut.

- tin cy lm vic cao: Tit kim c chi ph, cng vic bo tr v thay th. Mi chc nng ca rle c xy dng trn mt bo mch in, cc bo mch ny c tnh tng thch cao, cc bo mch ny c t ng kim tra theo nh k v hin th nhng khim khuyt trn mn hnh LCD, iu ny gip c th d dng pht hin khuyt im trn cc bo mch. Gim thiu cc hng hc ca cc phn trong bo mch nh lm gim s tiu th cng sut bng cch s dng IC MOS.

- Tch hp nhiu chc nng khc nh o dng in, in p, cng sut, ngoi ra mt s SEL cn tch hp chc nng gim st my ct (s ln ng ct, hao mn tip im), lu tr cc s kin gip h tr vic iu tra v phn tch s kin...

- H thng rle linh hot: Mi chc nng cha trong mt bo mch in v cu hnh mch ch cho php s dng khi nhp ng m s ca cc bo mch. iu ny to cho cc bo mch c th nhn mt cu hnh mch ph hp cho mi h thng rle. Hn na, vic s dng h thng x l a chc nng cho php x l nhiu chc nng vi hiu sut cao.

1.4.2.1-c im ca rle bo v thanh ci SEL-387 (Ghi ch thanh ci nm trong vng bo v so lch ca my bin p chnh).

- S dng SEL-387E bo v cc MBA lc hai hay ba cun dy, cc thanh ci, l phn ng, cc my pht, cc ng c ln, hay cc thit b cng sut khc. Cc ng dng ba hay bn u ni cho php vic tch kt ni ca cc my bin dng t 2 my ct c ni n cng cun dy MBA, nh thanh ci vng hay cc s mt ri. Cc gi tr ci t ca rle cho php bn s dng cc bin dng ni tam gic vi hu nh bt k loi kt dy no ca MBA.

- Rle SEL-387E c cc phn t so lch dng in c hm v khng hm c lp. Phn t c hm c mt t tnh dc phn trm gm hai ng, dc ca cc ng c th thay i c. Bo v so lch vi t tuyn dc phn trm tng cng nhy v an ton hn so vi bo v so lch truyn thng; c tnh dc kp b s khng i xng cho cc CT , li v t s bin i ca CT, CT bo ha, v nhng li do do s thay i nc. SEL-387E c s dng cc phn t kho sng hi ngn nga vic vn hnh khng mong mun trong sut qu trnh ng xung kch my bin p.

- Rle SEL-387E tng cng nhy pht hin cc s c chm t bn trong my bin p thng qua phn t bo v s c chm t c hm. Cc u vo ba cun dy c s dng cho vic ly dng trung tnh. Dng lm vic c nhn t dng v t c tnh ton cho cun dy c bo v. Mt phn t hng xc nh s c l bn trong hay bn ngoi. Vic ct mch l c gim st bi cc gii hn dng th t khng v gi tr ci t dng hm ca phn t th t thun. Cc phn t so lch chm t c hm REF gip tng cng nhy trong vic bo v cc s c chm t bn trong my bin th.

- Rle SEL-387E cung cp cc phn t 24 pht hin qu t thng. C hai cp tc ng, cp mt c gi tr ci t nh hn cp hai v lm vic vi thi gian di hn, phn t cp 1 phc v cho vic cnh bo hoc trip. Cp hai ca phn t cung cp mt trong 3 chn la t tnh lm vic, t tnh thi gian ph thuc/thi gian xc nh, hay hoc t tnh thi gian hn hp.

- Rle SEL-387E cung cp tm phn t qu/km in p. Cc phn t km /qu in p pha, cc phn t km/qu in p dy, cng nh cc phn t qu in p th t thun, th t nghch v qu in p th t khng. Cc phn t pha v dy tc ng khi bt k pha ring l vt qu gi tr ci t tng ng.

1.4.2.3-c im ca rle bo v ng dy

a- Rle SEL-421

- SEL-421 l mt rle bo v vi ng truyn tc cao c bit trip mt pha v ba pha v ng lp li c kim tra ng b, gim st my ct, bo v hng hc my ct, v logic bo v ng dy c b dc. Rle c tnh nng o lng m rng v ghi nhn d liu bao gm vic bo co v thu thp d liu vi chnh xc cao. - Vic thit k mt phn cng mnh v n gin c bit c hiu qu trong vic x l tn hiu. c im kt hp vi chc nng t kim tra trong phm vi rng nng cao tin cy v sn sng ca rle.

- Rle SEL - 421 bao gm cc c im sau:

+ Bo v u tin: Bo v khong cch pha v chm t vi 4 vng bo v, kt hp vi phn t qu dng c hng.

+ Trip tc cao: Rle SEL-421 s dng phn t HSDPS (chn la pha v nh hng tc cao) v cc phn t khong cch tc cao d tm cc s c trn h thng in.

+ ng lp li: C kh nng ng lp li mt pha v ba pha ca mt v hai my ct kt hp vi vic kim tra ng b khi c nhiu ngun cung cp.

+ Chc nng pht hin h hng my ct c kt hp bo v an ton cho my ct.

+ Kho v trip mt ng b: Chn kho mt ng b ca cc phn t khong cch hoc trip mt ng b khi c dao ng cng sut. Rle SEL-421 bao gm cc phn t bo v nhiu vng v logic d tm trng thi mt ng b.

+ Logic ng ct s c ca rle (SOTF) cho php xc nh cc phn bo v trip nhanh sau khi my ct ng, bo v cho con ngi v thit b, duy tr s lm vic ca cc thit b cn li ca trm.

+ B nh v s c a ra thng tin mt cch chnh xc phc hi nhanh chng xut tuyn c vn .

b- Rle SEL-311L

Rle SEL-311L cha cc phn t so lch dng in ng dy kt hp vi cc giao tip truyn thng tch hp. SEL 311L cng cha tt c cc phn t bo v, gim st v cc tnh nng giao tip nh: Bo v khong cch, qu dng c hng v v hng, bo v tn s v chc nng ng lp li nhiu ln. 1.5-Thng s k thut

SttThng sGi trn v

1Rle SEL-387E

-Tn s li in s dng50/60Hz

in p iu khin

+Gi tr nh mc125/250Vdc or Vac

+Phm vi in p iu khin85264Vac

85350Vdc

-Dng AC u vo1 hoc 5A

-Nhit lm vic-40 - 85C

2Rle SEL-421


-in p iu khin


+in p iu khin85264Vac

85350Vdc



3Rle SEL-311L


-in p iu khin125/250Vdc or Vac



85350Vdc



4Rle ng lp li SEL-279H

Tn s li in s dng50/60Hz

-in p iu khin



85350Vdc


1.6-Nguyn l lm vic1.6.1- Bo v so lch thanh ci C21a- Nhim v

Bo v so lch ng vai tr lm bo v chnh cho my bin p v thanh ci C21& C24 khi xy ra cc s c ngn mch mt pha, hai pha, hai pha chm t hoc ba pha trong vng bo v.

b- Phm vi bo v

- i vi phn t so lch 87T thuc H I, c phm vi bo v l min gii hn gia cc CT ly tn hiu a vo bo v c th l: Bin dng 6C(6000:1), 33C(2500:1)), 12-27C (400/1), v 11-27C (400/1). Phm vi ny bao gm cc thanh dn dng v cc thit b u vo pha h p ca my bin th, my bin th chnh cc thanh dn dng pha cao p ca my bin th v thanh ci C21.

- i vi phn t so lch (87GT) phm vi tc ng c gii hn gia cc bin dng ly tn hiu a vo bo v, c th l bin dng 1C(6000:1), 33C(2500:1)), 12-27C (400/1), v 11-27C (400/1). Phm vi ny bao gm: My pht, my bin th chnh, my bin th kch t, thanh ci C21 v cc thit b khc u ni vo min gii hn trn.

c- i tng tc ng

- Ti t rle bo v *MSPRB1:

+ Led Trip, Led 87 (87-1, 87-2, 87-3), Led A, B, C sng.

+ Tip im u ra OUT107 ng bo dng lnh MTR DIFFERENTIAL (87T)(SYS1).

- a tn hiu n rle kho 86-MT1. Trnh t tc ng ca rle kho 86-MT1 nh sau:

+ a tn hiu n rle kho 86-1 (1).

+ a tn hiu n cun Trip 1 ca my ct 271&273 c lp my bin th chnh ra khi li.

+ Bo dng lnh LOCK OUT RELAY 86-MT(1) OPERATION ti my tnh iu khin gim st.

- Trn bin bo s c Unit No.1 ANNUNCIATOR n MTR DIFFERENTIAL.

d- Nguyn l lm vic ca bo v

- Bo v so lch c c tuyn lm vic kiu dc phn trm kp. Bo v so lch dc phn trm nhy hn, tin cy hn so vi bo v so lch truyn thng. c tuyn dc kp cho php b s khng ng nht ca CT, li t s bin dng in, s bo ho CT v cc li do s thay i nc ca my bin th. Rle ny c chc nng kho sng hi v hm sng hi, hai chc nng ny mang li s lm vic n nh cho bo v trong sut qu trnh ng xung kch my bin th.

- SEL-387E c ba phn t so lch (87R-1, 87R-2, 87R-3). Cc phn t ny lm vic da trn nguyn tt tnh ton dng so lch (IOP) v dng hm (IRT) t tn hiu dng nhn c t cc bin dng. Bo v s tc ng dng lm vic IOP ln hn dng in hm IRT.

Hnh 1.6.1- Cc b lc v b dng in

- Dng in u vo t cc CT s c a qua khi thu thp d liu, sau c a qua cc b lc dng (B lc ly thnh phn c bn, b lc ly thnh phn bc 2, b lc ly thnh phn sng hi bc 4) cc thnh phn dng in c nhn h s b s sai bit do t s bin i ca my bin th, b kt ni nh hnh 1.6.1.

- Cc thnh phn dng sau khi b c s dng tnh ton dng lm vic IOP v dng in hm IRTn nh hnh 1.6.2.

Hnh 1.6.2-S minh ho vic tnh dng hm v so lch ca 87-1

- Phn t so lch khng hm U87n so snh dng so lch IOP vi gi tr ci t U87P. u ra ca khu so snh s c tn hiu tch cc nu dng so lch ln hn gi tr ci t.

- Phn t so lch c hm 87Rn kt hp phn t khng hm (phn t ny c gi tr ci t khc vi phn t U87n) nh s hnh 1.6.3

Hnh 1.6.3- Logic lm vic ca phn t so lch

- Kho bo v so lch theo kiu thng thng hoc c lp

- S dng cc phn t kho thng thng hoc c lp (87BL1, 87BL2, 87BL3) gim st cc phn t so lch c hm. Vic kho theo kiu thng thng v hiu ho tt c cc phn t c hm nu phn t kho tc ng.

Hnh 1.6.4-Logic kho sng hi cho phn t so lch

- Hnh 1.6.4 th hin vic v hiu ho chc nng kho c lp phn t so lch c hm. Nu IHBL c ci t vi N(No) logic hin th trn hnh 1.6.4 phn bn tri. Trong trng hp ny tt c cc phn t 87Rn a vo cng OR v tt c phn t 87BLn c a vo cng OR cn li, tn hiu u ra ca cng OR ny c a qua cng o sau a vo cng AND giao vi tn hiu u ra ca 87Rn. Nu u ra cng OR ca 87Rn xc nhn nhng 87BLn khng xc nhn Relay Word Bit 87R xc nhn v vic trip xy ra.

- Nu IHBL c ci t vi gi tr Y(Yes), logic kho c th hin trn Hnh 1.6.4 hnh bn phi. y cp logic 87R1 v tn hiu o 87BL1, 87R2& tn hiu o 87BL2, cp 87R3& tn hiu o 87BL3. Trong logic ny vic kho a n phn t ch v hiu ho vic trip ca phn t . Khi kiu hm sng hi c chn la, rle ch lm vic vi kiu kho ring tng phn t. Cc Relay Word bits 87R v 87U l cc phn t tc cao, cc phn t ny trip tt c cc my ct thng qua vic khp tip im u ra, cc tip im ny c kt ni vi rle kho 86MT.

- Hnh 1.6.5 th hin s lm vic ca phn t kho 87BL1, nu dng in sng hi bc 2, bc 4, hoc bc 5 trn ngng tc ng ca 2PCT, 4PCT hoc 5PCT. Phn t kho cng s tc ng nu t s dng dc th t thun v ngc vt qua mt ngng nh hnh 1.6.5. Vic kho ny ngn nga s lm vic khng mong mun trong sut qu trnh ng xung kch my bin th hoc khi my bin th b qu kch thch.

Hnh 1.6.5- Logic kho phn t so lch 87BL1

- Kho t s dc: Hnh 1.6.5 th hin logic kho dc cho cun dy qun 1 ca my bin th. Cc phn t DCBL1, DCBL2 v DCBL3 c kt hp hnh thnh DCLB. Tnh nng kho dc c p dng trong trng hp ng xung kch my bin th nhng trong trng hp ny thnh phn sng hi nh v dng dc cao.

Hnh 1.6.6- Logic kho dc (DCBL1)

e- c tnh lm vic

- c tuyn lm vic ca bo v c th hin nh hnh 1.6.7. dc ca cc ng t tuyn c th iu chnh c.

Hnh 1.6.62- c tnh lm vic bo v so lch c hm

- O87P: Gi tr lm vic nh nht ca bo v so lch.

- SLP1: ng dc u tin, n bt u ti im O87P l giao im ca IOP v IRT.

- IRS1: Gii hn vn hnh ca IRT cho ng dc SL1. im cui cng l giao im ca SLP1 v im bt u ca SLP2.

- SLP2: dc th hai

f- Tnh ton ci t

- Do s khng ng nht ca bin dng in, sai s ca bin dng, s bo ho ca CT lm cho dng sai lch c gi tr ln t bit trong trng hp xy ra s c ngn mch ngoi. Vic ci t phi m bo sao cho gi tr lm vic ti thiu ca bo v phi ln ngn nga bo v tc ng nhm trong trng hp trn.

- Ci t dc cho cc t tuyn lm vic:

+ DF1:

+ DF2:

1.6.2- Bo v ng dy 220kV

- bo v ng dy 220kV nh my A Vng s dng rle SEL. Mi ng dy c trang bi hai h thng: H I (SEL-311L), H II (SEL-421). Khi cc phn t thuc h thng I tc ng a tn hiu n rle kho 86LF-1, cc phn t thuc h thng II tc ng a tn hiu n rle kho 86LF-1B. S mch nh th nh Hnh 1.6.2.1.- Trm 220kV ca nh my A Vng c hai pht tuyn Thnh M 1 v Thnh M 2. Trong phn chuyn ny ch gii thiu cho ng dy Thnh M 1.

Hnh 1.6.2.1 - S mch nh th bo v ng dy Thnh M 1

1.6.4.1- Bo v so lch ng dy(87L)a- Nhim v

Bo v ng dy Thnh M 1 v Thanh ci C23 khi xy ra cc dng s c ngn mch mt pha, hai pha, hai pha chm t hoc ba pha nm trong vng bo v.

b- Phm vi bo v

Phm vi bo v l min gii hn gia cc bin dng 11-25C(400:1), 21-25C(400:1) v cc bin dng ly t pha u kia ca ng dy Thnh M 1.

c- i tng tc ng

- Ti t rle bo v LFPRB1:

+ Led Trip, Led 87 trn t rle SEL-311 sng, hin th phn t 87 tc ng.

+ Tip im OUT101 ng bo dng lnh DIFFERENTIAL RELAY (87L) (LF1-SYS1) trn my tnh iu khin v gim st.

- Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n s c LINE DIFFRENTIAL sng.

- a tn hiu n rle kho 86LF-1. Trnh t tc ng ca rle kho nh sau:

+ a tn hiu n cun Trip 1 ca my ct 274&273 ct my ct.

+ Bo dng lnh LINE FEEDER No.1 LOCK OUT 86LF-1 trn my tnh iu khin gim st.

+ Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n s c 86LF-1sng.

- a tn hiu n rle ng lp li 279H-1 ng lp li my ct 273 hoc 274 nu s c ngn mch mt pha.


- Rle SEL-311L bao gm 5 phn t so lch dng ng dy, l phn t so lch dng cc pha, phn t so lch dng th t nghch v phn t so lch dng th t khng nh hnh 1.6.4.2.

Hnh 1.6.4.2- S nguyn l u dy cho phn t so lch

- Rle SEL-311L chuyn i ng b cc mu dng in Ia, Ib v Ic gia cc u ng dy c bo v. Mi rle tnh ton dng in 3I2 v 3I0 ti tt c cc u ng dy. Cc phn t so lch dng in 87LA, 87LB, 87LC, 87L2 v 87LG trong mi rle so snh dng in Ia, Ib, Ic, 3I0 (IG) v 3I2 ti mi u ng dy. Tt c cc rle tin hnh cc tnh ton dng in so lch cng lc hn ch thi gian tr trong vic chuyn i trip.

- Cc phn t so lch pha 87LA, 87LB, 87LC nhn bit mt cch tin cy cc s c 3 pha. Phn t th t nghch 87L2 nhn bit cc s c mt cn bng bn trong v b hm khi tt c in c ba pha ti bt k u ng dy no vt qu 3I.nom.

Hnh 1.6.4.3- Mt phng Alpha th hin t s phc ca cc dng in ti v tr t bo v vi dng in u kia.

- Gi thit dng in i vo ng dy c bo v c gc pha bng 0, dng in chy ra khi ng dy c gc pha bng 1800. Dng in ti c ln 5A chy t u ny n u kia ca ng dy, lc dng in pha A ti rle u ny l 50o , dng in pha A ti rle u kia l 5180o. T s dng in t xa v ti ch l

- Trn mt phng alpha Hnh 1.6.4.3 t s ny c th hin bng mt im nm pha bn tri ca gc to . ng vin bao quanh im 1180o trn mt phng Alpha l vng hm ca bo v nh hnh 1.6.4.5. Rle xut lnh trip khi t s dng in trn mt phng pha di chuyn ra khi vng hm v dng in so lch vt qua ngng ci t.

- Gii thch cc k hiu trn s hnh 1.6.4.4:

+ Ia local: Dng in pha A ti v tr t bo v.

+ Ia Channel X: Dng in pha A u kia ng dy.

+ Align: B iu chnh, chc nng lc dng in.

+ CTR: T s bin i dng in.

+ 87LPP: Gi tr ci t tc ng ca bo v so lch.

+ H: B nh thi gian.

+ Alpha Plane: Mt phng pha, chc nng gim st vng s c.

- Nguyn l lm vic ca phn t so lch pht hin s c ba pha nh sau:

+ Bo v ly tn hiu dng in bng cc bin dng t hai u ng dy c bo v, tn hiu dng u dy kia c bin i thnh tn hiu ph hp truyn theo ng cp quang, tn hiu ny c kt ni n knh X ca rle. Tn hiu dng IAL v IAR c cng vect v sau c ly ln a vo cng (+) ca khu so snh so snh vi gi tr ci t 87LPP. u ra ca khu so snh s c tn hiu tch cc nu ln vect dng so lch ln hn gi tr ci t ca bo v. Dng IAL v IAR cng c a vo khi gim st min lm vic ca bo v, Relay Word Bit R87LA s nhn tn hiu logic mc 0 khi xy ra ngn mch trong vng bo v. Relay Word Bit 87LA nhn mc logic bng 1 (bo v so lch ng dy tc ng) khi dng so lch ln hn gi tr ci t v xy ra ngn mch trong vng bo v.

Hnh 1.6.4.4- S logic ca bo v so lch ng dy

e- c tnh lm vic ca bo v

Hnh 1.6.4.4 - c tuyn lm vic ca bo v so lch ng dy

- Hnh dng ca vng hm c m t bi hai vng ci t, nh m t trn hnh 1.6.4.4. Gi tr ci t ca 87LANG xc nh ng knh bn ngoi ca vng hm. Gi tr ci t 87LR xc nh bi bn knh bn ngoi ca vng hm. Bn knh trong l nghch o ca 87LR. C ba thnh phn (th t thun - th t nghch - th t khng) c gi tr ci t khc nhau tng cng kh nng ct s c ca bo v. V d, ci t gi tr ct ca 87LPP cho cc phn t pht hin s c pha 87LA, 87LB, 87LC.

- Nu t s dng ca pha A vt qua vng hm, v dng pha A vt qu ci t ca 87LPP th thnh phn 87LA tc ng. Gi tr ci t ca phn t so lch pht hin s c chm t 87LGP v mt cn bng pha 87L2P cng gim st tng t nh cc thnh phn pha.

f- Tnh ton ci t cho bo v

- Ci t cc thnh phn pha so lch 87LA, 87LB v 87LC chc chn pht hin c s c ba pha. Ci t thnh phn so lch th t nghch 87L2 chc chc pht hin c s khng cn bng pha (87L2 c khng ch khi tt c dng 3 pha t bt k ng dy no vt qu 15A khi dng nh mc ca rle l 5A hoc 3A khi dng nh mc ca rle l 1A). Thnh phn 87LG c hm khi dng in hai hoc nhiu pha t cc ng dy u ni vo vt qu 3*Inom).

- Cc gi tr ci t c th ( b xung sau).

1.6.4.2-Bo v khong cch (21)a-Nhim v

Bo v cho ng dy Thanh M 1 v thanh ci C23 khi xy ra cc s c ngn mch mt pha, hai pha, hai pha chm t, ba pha nm trong vng bo v.

b- Phm vi tc ng

ng dy Thnh M 1, thanh ci C23, cc thanh ci, ng dy ca trm i din v cc thit b u vo ng dy v thanh ci ny.

c- i tng tc ng

- Ti t rle bo v LFPRB1+ Led Trip, Led 21 trn t rle SEL-421 sng, hin th phn t 21 tc ng.

+ Tip im OUT101 ng bo dng lnh DISTANCE RELAY (21/21N) (LF-SYS2) trn my tnh iu khin v gim st.

- a tn hiu n rle kho 86-LF2, trnh t tc ng ca rle kho nh sau:

+ a tn hiu n cun Trip 2 ca my ct 274&273 ct my ct.

+ Bo dng lnh LINE FEEDER No.1 LOCK OUT 86LF-2 trn my tnh iu khin gim st.

- Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n s c DISTANCE RELAY sng, bo bo v khong cch tc ng.

- a tn hiu n rle ng lp li 279H-1 ng lp li ng dy nu xy ra s c mt pha.


Tham kho bo v khong cch my pht in

e- c tnh lm vic ca bo v

Tham kho bo v khong cch my pht inf- Tnh ton ci t cho bo v

Phn t khong cch pha (21P) v phn t pht hin s c chm t (21MG):

- Phm vi phn t bo v khong cch pha vng 1:

+ Vng 1 c ng dng bo v tc thi cho cc s c mt pha, hai pha, hai pha chm t v s c 3 pha nm trong gii hn 80% chiu di ng dy c bo v. V cc sai s do my bin dng v my bin in p, module truyn ti d liu trn ng dy v sai s do tnh ton d liu nn khng cho php ci t vng 1 n 100% ng dy. Nu ci t n gi tr 100% ng dy vng 1, vic Trip ngoi mun c th xy ra khi c s c thong qua v tr rt xa nh s c phn cui ca ng dy hoc s c trn ng dy k tip iu ny s lm mt tnh chn lc cho bo v.

+ t vng 1 ca bo v khong cch bng 80% tr khng th t thun ca ca ng dy: Z1P = 0.8 Z1L

+ Trong : Z1L l tr khng ng dy

- Phm vi phn t bo v khong cch pha vng 2:

+ Bo v khong cch pha vng 2 phi chn la m bo pht hin tt c cc s c hai pha, hai pha chm t v s c 3 pha trong ton b ng dy v 20% chiu di ng dy k tip.

+ Ci t vng 2 ca bo v khong cch ln n 120% tr khng th t thun ca ng dy truyn ti: Z2P = 1.2 Z1L

+ Trong : Z1L l tr khng ng dy

- H s b dng th t khng:

+ Nh ci t trn, phn t khong cch chm t v pha ging nhau (v d, Z1P = Z1MG), phn t khong cch chm t cng o tr khng s c ca tr khng th t thun. V th i vi bo v khong cch chm t th t khng, rle t ng tnh ton ci t h s b dng th t khng cho vng 1 khi bn t k0M1 Auto.

- Khi bn nhp AUTO nh ci t i vi k0M1, rle tnh ton b dng th t khng nh sau:

- Vng 2 s dng h s b dng th t khng nh i vi vng 1 bi v nhng ng dng ci t l khng sn sng.

- Thi gian tr phn t khong cch:

+ i vi bo v khong cch vng 1; khng cn ci t thi gian v trip tc th.

+ Thi gian tr vng 1(OFF, 0.000-16000 chu k) Z1D:= 0.000.

+ Thi gian ca bo v khong cch vng 2 phi tng ng vi bo v khong cch vng 1 cng vi thi gian vn hnh my ct v h s an ton. Ci t thi gian ca khong cch chm t v pha vng 2 l 20 chu k.

+ Thi gian tr vng 2 (OFF, 0.000-16000 chu k) Z2D:=20.000.

1.6.4.3- Bo v qu dng ng dy (50/51, 50/51N, 67/67N)a-Nhim v

Nhm bo v d phng cho cc thit b nm trong vng bo v.

b- Phm vi tc ng

- Cc phn t qu dng pha v hng:

Phm vi tc ng l ng dy thanh ci, my bin p chnh v t dng. ng dy thanh ci v cc thit b thuc trm i din.

- Cc phn t qu dng pha c hng:

Phm vi tc ng l thanh ci C23, ng dy Thnh M 1 v cc thit b thuc trm i din.

- Cc phn t qu dng chm t v hng:

Phm vi tc ng l thanh ci, ng dy, my bin p chnh, cc thit b khc ..

- Cc phn t qu dng chm t c hng:

Phm vi tc ng l thanh ci C23, ng dy Thnh M 1..c- i tng tc ng

- Ti t rle bo v LFPRB1

+ Led Trip sng, Led 50/51 sng nu phn t qu dng pha tc ng, Led 50/51N sng nu phn t qu dng chm t tc ng, Led 67/67N sng nu phn t qu dng c hng tc ng.

+ Tip im OUT102 ng bo dng lnh DIRECTIONAL OVERCURRENT (67/67N) (LF1-SYS1) trn my tnh iu khin v gim st nu phn t qu dng c hng tc ng.

+ Tip im OUT103 ng bo dng lnh OVERCURRENT PROTECTION (50/51) (LF1-SYS1) trn my tnh iu khin v gim st nu phn t qu dng pha v hng tc ng.

+ Tip im OUT104 ng bo dng lnh NEUTRAL OVERCURRENT (50/51N) (LF1-SYS1) trn my tnh iu khin v gim st, nu phn t qu dng chm t v hng tc ng.

- Bo dng lnh LINE FEEDER No.1 LOCK OUT 86LF-1(2) trn my tnh iu khin gim st.

- Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n s c:

+ OVERCURRENT sng nu phn t qu dng pha tc ng.

+ DIRECTIONAL OVERCURRENT sng nu phn t qu dng pha c hng tc ng.+ NEUTRAL OVERCURRENT sng nu phn t qu dng chm t tc ng.

+ n s c 86 LF-1 sng.d- Nguyn l lm vic ca bo v

Tham kho cc phn t qu dng bo v my bin p chnh trong chuyn rle & cc nhm s c v in.e-t tnh lm vic

Tham kho cc phn t qu dng bo v my bin p chnh trong chuyn rle & cc nhm s c v in.f-Ci t gi tr tc ng

B sung sau

1.6.4.3- Bo v h hng my ct 273

a- Nhim v

Hn ch s c xy ra trn din rng khi xy ra s c m my ct 273 khng ct do h hng bn trong my ct nh (kt c cu truyn ng, p lc kh SF6 gim thp, h hng cun ct hoc mch iu khin).b- i tng tc ng

- Khi phn t bo v h hng my ct thuc khi rle SEL-421 thuc t rle LFPRB1 tc ng:

+ Phn t 50BF Tip im OUT204 ng a tn hiu n cun trip 2 ca my ct 273 ct li my ct 273.

Tip im OUT106 ng bo dng lnh BREAKER FAILURE 273-LF1 (50BF) (LF1-SYS1) ti SYLCU2.

+ Phn t 50BF- Timer

Tip im OUT205 ng a tn hiu n cun trip 1 ca my ct 271 tip tc ct my ct. ng thi a tn hiu n rle kha 86-1 ngng khn cp my 1. a tn hiu n rle SEL-311L thuc t LFPRB1 truyn ct my ct lin quan trm i din.

Tip im OUT212 ng bo dng lnh 273 BREAKER FAILURE TIMER OUTPUT (LF1-SYS2).

- Khi phn t bo v h hng my ct thuc khi rle SEL-421 (1) thuc t rle CFPRB tc ng:

+ Phn t 50BF

Tip im OUT204 ng a tn hiu n cun trip 1 ca my ct 273.

Tip im OUT107 ng bo dng lnh BREAKER FAILURE 273-CF1 (50BF) (CF-SYS1) ti SYLCU2.+ Phn t 50BF- Timer

Tip im OUT205 ng a tn hiu n rle ph 274TP1X tip im tng ng ca rle ph ng a tn hiu n cun Trip 1 ca my ct 274 & 271 ct my ct 274 & 271. a tn hiu n rle kha 86-1 ngng my. a tn hiu n rle SEL-311L ct cc my ct lin quan ca trm i din.

Tip im OUT213 ng bo dng lnh 273 BREAKER FAILURE TIMER OUTPUT (CF-SYS1).

- Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n BREAKER FAILURE sng.

c- Nguyn l lm vic ca bo v

- bo v h hng my ct 273 nh my A Vng s dng hai phn t:

+ Phn t 50BF.

+ Phn t 50BF-Timer

- Cc phn t bo v h hng my ct lm vic nh mt rle to thi gian tr, c kch hot bi cc phn t bo v thuc khi rle SEL-421 ca bo v ng dy hoc bo v kt gin. Thi gian lm vic ca phn t 50BF thng thng c phi hp vi thi gian lm vic ca cc phn t qu dng d phng. Lnh ct ca cc phn t 50BF c hiu lc khi khong thi gian to tr ht v my ct vn ang duy tr trng thi ng.d-Ci t gi tr tc ng (B sung sau)

1.6.4.3- Bo v h hng my ct 271

a- Nhim v

Hn ch s c xy ra trn din rng khi xy ra s c m my ct 271 khng ct do h hng bn trong my ct nh (kt c cu truyn ng, p lc kh SF6 gim thp, h hng cun ct hoc mch iu khin).b- i tng tc ng

- Khi phn t bo v h hng my ct thuc khi rle SEL-421 thuc t rle LFPRB2 tc ng:

+ Phn t 50BF

Tip im OUT202 a tn hiu n cun trip 2 ca my ct 271 ct my ct tng ng.

Tip im OUT106 ng bo dng lnh BREAKER FAILURE 271-LF2 (50BF) (LF2-SYS2) ti SYLCU2.+ Phn t 50BF- Timer

Tip im OUT203 ng a tn hiu n cun trip 1 ca my ct 272 & 273 ct my ct. ng thi a tn hiu n rle kha 86-1 ngng khn cp my 1. a tn hiu n rle SEL-311 thuc t LFPRB2 truyn ct my ct lin quan trm i din.

Tip im OUT212 ng bo dng lnh 271 BREAKER FAILURE TIMER OUTPUT (LF2-SYS2).

- Khi phn t bo v h hng my ct thuc khi rle SEL-421 (1) thuc t rle CFPRB tc ng:

+ Phn t 50BF

Tip im OUT202 ng a tn hiu n cun trip 2 ca my ct 271 ct my ct 271.

Tip im OUT106 ng bo dng lnh BREAKER FAILURE 271-CF1 (50BF) (CF-SYS1) ti SYLCU2.+ Phn t 50BF- Timer

Tip im OUT203 ng a tn hiu n cun trip 1 ca my ct 272&273 ct cc my ct 272&273. a tn hiu n SEL-311L thuc t LFPRB2 truyn ct cc my ct lin quan thuc trm i din. a tn hiu n rle kha 86-1 ngng my 1.

c- Nguyn l lm vic (Tng t nh trn)d- Ci t gi tr tc ng (B sung sau)

1.6.5- Bo v kt gin thanh ci

- bo v kt gin thanh ci nh my A Vng s dng hai b rle SEL-421, cc tnh nng v nguyn l lm vic ca cc phn t tng t nh khi rle SEL-421 bo v ng dy.

- Khi mt trong cc phn t trong khi rle SEL-421 (rle 1) thuc t CFPRB tc ng a tn hiu i ct my ct 271&273. V a tn hiu n rle kha 86-1 ngng khn cp t my.

- i vi khi SEL-421 (1) ca bo v kt gin thanh ci ly tn hiu in p t PT 1-4P (B), ly tn hiu dng t CT 11-26C v 12-26C.

- i vi khi SEL-421 (2) ca bo v kt gin thanh ci ly tn hiu in p t PT 2-4P (B), ly tn hiu dng in t cc CT 21-26C v 22-26C.

- Bo v kt gin thanh ci cng c cc phn t bo v h hng my ct tn hiu tc ng v nguyn l lm vic tham kho phn bo v h hng my ct 271 v 273.

- Phm vi bo v ca khi rle ny l thanh ci C21 my bin p chnh, my pht in v cc thit b u ni vo phm vi trn.1.6.6- Rle ng lp li 279H

a- Nhim v

Khi xy ra s c trn ng dy bo v ng dy s tc ng a tn hiu i ct cc my ct lin quan c lp s c. Qua nghin cu thng k khi xy ra s c vic ng li ng dy khi phc ngun in vi xc sut thnh cng ln, t bit i vi cc s c mt pha xc sut thnh cng c th t t 90 -98%. Trn c s nng cao tin cy cung cp in nh my A Vng s dng rle ng lp li 279H thc hin vic ng lp li cho cc ng dy 220kV. Vy nhim v chnh ca 279H l dng ng lp li ng dy gp phn nng cao tin cy cung cp in.

b- i tng tc ng

- Rle ng lp li SEL-279H thuc t LFPRB1

+ Khi SEL-279H tc ng tip im u ra OUT1(OUT 2) ng a tn hiu i ng lp li my ct 273 hoc 274 ty thuc vo vic ci t ca ngi vn hnh.

+ Tip im OUT3 ng bo dng lnh RECLOSING FOR 273 ti SYLCU2.

+ Tip im OUT4 ng bo dng lnh RECLOSING FOR 274 ti SYLCU2

- Rle ng lp li SEL-279H thuc t LFPRB2

+ Khi SEL-279H tc ng tip im u ra OUT1(OUT 2) ng a tn hiu i ng lp li my ct 271 hoc 272 ty thuc vo vic ci t ca ngi vn hnh.

+ Tip im OUT3 ng bo dng lnh RECLOSING FOR 273 ti SYLCU2.

+ Tip im OUT4 ng bo dng lnh RECLOSING FOR 274 ti SYLCU2.c- Nguyn l lm vic ca bo v

- Rle SEL-279H c thit k vi ba ch ng lp li:+ ng lp li mt pha.

+ ng lp li ba pha.

+ ng lp li mt pha v ba pha.

- Vic chn la ch ng lp li c thc hin bi ngi vn hnh thng qua kha chn la .. b tr ti t LFPRB1 i vi rle ng lp li ng dy Thnh M 1, v ti t LFPRB2 i vi rle ng lp li ng dy Thnh M 2. Kha chn la ny c 4 v tr 1PH, 3PH, 1 + 3 PH v v tr OFF. V tr OFF cho php c lp ch ng lp li ca rle.

- Vic kch hot rle ng lp li lm vic thng thng do cc phn t bo v chnh thc hin. C th i vi ng dy Thnh M 1 v Thnh M 2 rle ng lp li 279H c kch hot do phn t so lch ca SEL-311L hoc phn t khong cch ca SEL-421 ca bo v ng dy.

- Khi xy ra s c cc phn t bo v chnh s a tn hiu i ct cc my ct lin quan loi tr im s c ng thi a tn hiu i kch hot rle ng lp li 279H. Sau khong thi gian tr rle 279H s a tn hiu n cun ng ca my ct c ch nh thc hin vic ng lp li. Thi gian tr ci t phi c tnh ton sao cho m bo dp tt h quang duy tr pht sinh ti im xy ra s c nhm nng cao kh nng thnh cng khi ng lp li nhng ng thi cng tnh ton n n nh ca h thng in.

- Nu s c vn tn ti sau khi ng lp li bo v s thc hin lnh final trip v kha ch ng lp li.Chng 2

QUY NH AN TON

2.1- Bin php an ton trong qu trnh vn hnh

2.1.1- An ton khi vn hnh thit b

Khi vn hnh h thng rle bo v:

- Phi lun a bo v vo lm vic vi y cc chc nng, sn sng bo v tt c cc dng h hng xy ra trong vng bo v.

- Khng c php t tch bt k phn t hoc h thng bo v no ra khi vn hnh.

- c php m ca cc t xem xt tnh trng thit b trong t. Thao tc cc nt nhn trn mt trc t xem gi tr o lng, trng thi rle v gii tr tn hiu.

- Cm nhn vin vn hnh ct cc p t mt cp ngun cho cc t rle, thay i gi tr ci t bo v, thay i mt khu, ngt ng tn hiu t rle n mch iu khin m my ct.

Khi vn hnh h thng rle bo v phi tun th theo quy trnh, quy phm sau:

- Quy phm k thut an ton khai thc thit tr in cc nh my in v li in.

- Quy phm k thut vn hnh nh my in v li in.

- Quy trnh k thut an ton in.

2.1.2- An ton khi giao tip vi thit b

Cc thit b in t bn trong t rle, nhy cm vi s np v phng ca in tch tnh. Do vy khi lm vic trn rle cc phn b di di b phn che chn, tip xc cc bo mch c nhn ngi phi c tip t thch hp nu khng s gy nguy him cho thit b.

Vic di chuyn cc phn che chn mt trc ca rle s l cc mch in, cc phn ny c th l nguyn nhn gy git in m kt qu c th gy cht ngi hoc b thng khi chm vo.

Khng c php h mch cc bin dng hoc ngn mch cc bin in p. in p cao khi h mch bin dng, dng in ln khi ngn mch bin in p c th gy nguy him cho ngi v thit b.

1.2.3- An ton trong vic kim tra v ghi chp thng s

Khng ng ca t bo v qu mnh trong qu trnh kim tra thit b v chn ng mnh c th l nguyn nhn lm cho bo v tc ng nhm.

Khng chm vo cc im ni khng c bc cch in v in p cao c th gy nguy him cho ngi v thit b.

2.2- Bin php an ton trong qu trnh a ra sa cha

Ch c php a bo v ra sa cha khi:

- Cc my ct ca h thng bo v ct. Trong trng hp thit b c bo v bi nhiu h thng rle, khi ch c lp mt trong cc h thng th yu cu ny c th b qua.

- Yu cu c lp cc lnh ct t h thng rle bo v ti cc my ct c lin quan.

- Ch cho php thao tc sa cha trn cc phn t c cch ly khi mch in p v dng in.

2.3- Quy nh v an ton trong khi thao tc a vo vn hnh sau khi sa chaSau khi lp rp, sa cha, i tu phi kim tra, th nghim hiu chnh t cc yu cu k thut, c nghim thu bn giao y . Cc bc kim tra a Rle vo vn hnh gm:

- Kim tra c y cc bin bn th nghim v kt lun: rle tiu chun a vo vn hnh.

- Kim tra thc t ti thit b

- kt thc mi cng vic sa cha ti t rle bo v , ti hin trng c thu dn sch s.

- Cc cht th nghim c lp mch dng v mch p phi c di di.

- Cc mch u vo (dng, p) phi ng v tr, ngun cung cp kt ni vi b ngun ca bo v phi m bo ng cc tnh, trc khi ng ngun cho thit b cn kim tra in p nh mc u vo ca b ngun.

- Kim tra cc in tr sy, n chiu sng trong t phi sng khi m ca t pha sau, nu cc phn t ny b c lp th kim tra cc p t mt cp ngun cho cc thit b .

- Cc cu ni a tn hiu t bo v n mch iu khin my ct phi ng v tr.

- Phn xng sa cha kim tra, hiu chnh t yu cu v ng k a vo vn hnh.

2.4- Cc thng tin an ton i km thit b cn ch trong qu trnh vn hnh, sa cha

1- CAUTION: Khng o cc tnh in p mt chiu hoc xoay chiu ti cc im ni Z25 v Z26 ca rle SEL. Vic o cc tnh s gy nguy him cho b ngun cung cp v lm h hng khi rle bo v.

2- CAUTION: Cc tip im u ra tiu chun ca rle SEL c thit k nh mc lm vic v chu c dng qua cun trip, nhng khng chu c dng in khi ngn mch cun trip. Dng in khng c vt qu cc gi tr dng nh mc khi ngn mch tip im, ghi trn bng c im k thut ca rle.

3- CAUTION: Cc thit b in t bn trong t rle, nhy cm vi s np v phng ca in tch tnh. Do vy khi lm vic trn rle cc phn b di di b phn che chn, tip xc cc bo mch c nhn ngi phi c tip t thch hp nu khng s gy nguy him cho thit b.

4- CAUTION: C ting n gy h hng thit b, nu b ngun c thay th khng ph hp. Vic thay th ch ph hp vi RAY-O-Vac( s BR2335 hoc cc thit b tng ng theo yu cu ca nh sn sut.

5- WARNING: Thit b ny c t cc mt khu mt nh. Cc mt khu mt nh s c thay i thnh cc mt khu ring khi lp t. Vic qun cc mt khu ring s gy mt quyn ng nhp vo bo v. SEL s khng chu trch nhim cho bt k cc thit hi no do mt quyn ng nhp.

6- DANGER: Vic di chuyn cc phn che chn mt trc ca rle s l cc mch in, cc phn ny c th l nguyn nhn gy git in m kt qu c th gy cht ngi hoc b thng khi chm vo.

7- DANGER: Khng c php h mch cc bin dng (CT) hoc ngn mch cc bin in p (PT). in p cao khi h mch CT, dng in ln khi ngn mch PT c th gy nguy him cho ngi v thit b2.5- Danh mc cng vic lm theo PTT v PCTSTTTn thit bCng vic thc hinPCTLCT

1Bo v thanh ciKim tra nh k cc thng s ci tX

Sa cha hoc thay b cp ngun iu khin SEL-387EX

Kim tra v bo tr khi SEL-387E t ng kim tra pht hin li X

2Bo v ng dyKim tra nh k cc thng s ci t X

Sa cha hoc thay b cp ngun iu khin SEL-311LX

Kim tra v bo tr khi SEL-311L t ng kim tra pht hin liX

Chng 3

LP T, VN HNH V BO TR

3.1- Lp t

Cc cng vic lp t, th nghim ban u do nh thu thc hin. i vi cc thit b bo v tnh t thanh ci v pha nh my do nh thu chnh nh ci t thng s bo v. Cc bo v t thanh ci tr ra pha ng dy do cp iu c quyn iu khin thit b tnh ton chnh nh.

3.2- Vn hnh thit b

My pht, my bin p chnh, ng dy u c trang b hai h thng bo v lm vic c lp nhau. H I tc ng s a tn hiu n cun Trip 1 ca my ct tng ng c lp s c. H 2 tc ng s a tn hiu n cun Trip 2 ca my ct tng ng.

3.2.1-Trng thi sn sn lm vic ca bo v

3.2.1.1-Trng thi sn sng lm vic ca bo v thanh ci C211- Ti t DC5

- MCCB- cp ngun cho bo v my bin p chnh v my bin th t dng ng.

2- Ti t rle *MSPRB1

- Cc p t mt 8D1, SSM1, SSM2 cp ngun cho SEL-387E, SEL-351 v SEL-501 thuc h thng I ng.

- Cc Test Plug ca khi th nghim phi c di di khi cc Test Terminal:

+ 1- 27C TT, 2-27C TT, 33C TT, 6C TT ca khi SEL-387E thuc h thng I.

3- Ti t rle *MSPRB2

- Cc p t mt 8D2, SSM4, SSM5 cp ngun cho SEL-387E, SEL-351 v SEL-501 thuc h thng II ng.


+ *1-26C TT, *2-26C TT, 34C TT, 1C TT, 3P TT ca khi SEL-387E thuc h thng II.

4- Led EN trn mt trc rle SEL-387E5- Led Trip trn mt trc cc rle tt, cc Led hin th trng thi tc ng ca cc phn t tt. Nu cc Led ny sng phi tin hnh gii tr bng nt nhn TARGET RESET/LAMP TEST.

3.2.1.2 -Trng thi sn sng lm vic ca bo v kt gin thanh ci 1- Ti t DC..

- p t mt .cp ngun cho bo v kt gin thanh ci ng.

2- Ti t rle CFPRB

- p t mt 8D1, 8D2, SS11, SS12, SS21, SS22 cp ngun cho SEL-421 ng.


+ 1- 4P(B), 11-26C TT, 12-26C TT ca khi CF PROT RELAY UNIT-1.

+ 2- 4P(B), 21-26C TT, 22-26C TT ca khi CF PROT RELAY UNIT-2.

3- Led ENABLE trn mt trc t bo v sng (mu xanh).

4- Led Trip trn mt trc SEL-421 tt, cc Led hin th trng thi tc ng ca cc phn t tt. Nu cc Led ny sng phi tin hnh gii tr bng cch truy cp vo menu chnh MAIN MENU chn DISPLAY TEST, chi tit xem hng dn vn hnh SEL-421.

5- Cc cu ni a tn hiu t rle n mch iu khin my ct trn t rle bo v v tr kt ni.

3.2.1.3-Trng thi sn sng lm vic ca bo v ng dy Thnh M 1 v thanh ci C231- Ti t DC-8

- MCCB-09 cp ngun cho rle SEL-311L ng.

- MCCB-12 cp ngun cho SEL-421 ng.

2- Ti t rle bo v LFPRB1

- Cc p t mt 8D1, SS11, SS12 cp ngun cho rle SEL-311L ng.

- Cc p t mt 8D2, SS12, SS22 cp ngun cho rle SEL-421 ng.


+ 11-25C TT, 21-25C TT ca khi SEL-311L.

+ 1-5P(B) TT, 11-28C TT, 21-28C TT ca khi SEL-421.

3- Khi rle SEL-42:

- Led ENABLE trn mt trc rle sng (mu xanh).

+ Led SPT ENABLE sng, nu Led ny tt nhn nt nhn {SPT ENABLE}.+ Led COMM SCHEME ENABLE sng, nu Led ny tt nhn nt nhn {COMM SCHEME ENABLE}.

+ Led RECLOSE ENABLE sng, nu Led ny tt nhn nt nhn {RECLOSE ENABLE}.+ Led Trip trn mt trc SEL-421 tt, cc Led hin th trng thi tc ng ca cc phn t tt. Nu cc Led ny sng phi tin hnh gii tr bng cch truy cp vo menu chnh MAIN MENU chn DISPLAY TEST, chi tit xem hng dn vn hnh SEL-421.

4- Khi rle SEL-311L:

+ Led EN trn mt trc t bo v sng (mu xanh).

+ Led Trip tt, cc Led hin th trng thi lm vic ca cc phn t bo v tt. Nu cc Led ny sng phi tin hnh gii tr bng cch nhn nt nhn TARGET RESET/LAMP TEST .

5- Cc cu ni a tn hiu t rle n mch iu khin my ct trn t rle bo v v tr kt ni.

3.2.1.4- Trng thi sn sng lm vic ca rle ng lp li 279H-21- Ti t DC-08.

- MCCB-09 cp ngun cho SEL-279H-2 ng.

2- Ti t LFPRB1

- p t mt 8D1, SS11, SS12 cp ngun cho SEL-279H-2 ng.

- Cc Test Plug ca khi th nghim phi c di di khi cc Test Terminal 1-4P(B) TT, 2-4P(B) TT, 1-5P(B) TT.

3- Led BK1 hoc BK2 ca mc RECLOSE sng.

3.2.2 -Phng thc vn hnh

a- Phng thc vn hnh bnh thng:

C hai h u c a vo lm vic, khi xy ra mt s c no c hai h cng tc ng. H I s gi tn hiu n rle kho th nht, H II s gi tn hiu n rle kho th 2.

b- Phng thc vn hnh s c

Khi hng hc rle ca h no , cc khi rle ca h s b c lp, h cn li vn lm vic bnh thng. Vn m bo c yu cu bo v cho thit b.

3.2.3- Ch vn hnh

Bo v lun lm vic ch t ng

3.2.4- Ch kim tra, theo di v ghi chp thng s trong qu trnh vn hnh

Kim tra s hin th ca cc n Led trn khi rle. Kim tra trng thi rle thng qua cc m li hin th trn mn hnh LCD hoc trn cc trang s c trn my tnh iu khin gim st.

Kim tra tnh trng lm vic ca cc b sy, n chiu sng trong t.

3.2.5- Danh mc cng vic lm theo PTT v PCT

STTTn thit bCng vic thc hinPCTLCT

1Bo v thanh ciKim tra nh k cc thng s ci tX

Sa cha hoc thay b cp ngun iu khin SEL-387EX

Kim tra v bo tr khi SEL-387E t ng kim tra pht hin li X

2Bo v ng dyKim tra nh k cc thng s ci t X

Sa cha hoc thay b cp ngun iu khin SEL-311LX

Kim tra v bo tr khi SEL-311L t ng kim tra pht hin liX

3.3- Hng dn vn hnh

- Vic vn hnh cc rle SEL c th c thc hin theo hai phng php:

+ Vn hnh trc tip trn cc nt nhn mt trc t rle.

+ Vn hnh thng qua (phn mm + my tnh c nhn) kt ni n cng PORT F trc t rle bo v.

- V chuyn ny ch i su vo lnh vc vn hnh nn phng php vn hnh th hai khng c cp trong chuyn ny. M ch trnh by ngi vn hnh hiu thm v phn mm giao tip v minh ho cc thc kt ni my tnh c nhn vi cc rle bo v.

3.3.1- Vn hnh trc tip trn cc nt nhn trc t

3.3.1.1- Rle SEL-387E (Xem chuyn rle bo v t my)3.3.1.2- SEL-421

Hnh 3.1-Khi rle SEL-421

a- Gii thiu v mt trc t rle SEL-421

- Mt trc t iu khin SEL-421 gm:

+ Mt mn hnh tinh th lng 128x128 pixel, c s dng hin th d liu lm vic ca rle bao gm cc bng tm tt s kin, s liu o lng, cc ci t v thng tin t kim tra ca rle.

+ Su nt nhn iu chnh hng nm gn mn hnh LCD iu khin cc menu ca rle v cc trang thng tin trn mn hnh.

+ {ESC}- Nt nhn thot.

+ {ENT}- Nt nhn Enter.

+ Cc nt nhn iu chnh hng {Mi tn sang tri}, {Mi tn sang phi}, {Mi tn hng ln}, {Mi tn hng xung}.

Hnh 3.2-Mn hnh LCD v cc nt nhn iu chnh hng.

+ Cc n Led hin th nh hnh 3.3. Chc nng c th ca tng Led c gii thch trong bng 1.7.2

Bng 3.1- Cc LED hin th trn mt trc t iu khin.

STTTn LEDChc nng

1ENABLEKhi Led ny mu xanh rle c a vo s dng. Khi LED ny mu rle b v hiu ho.

2TRIPKhi Led ny sng hin th vic Trip xy ra

3INSTKhi Led ny sng hin th cc phn t ct nhanh tc ng.

4TIMEKhi Led ny sng hin th cc phn t Trip c thi gian tc ng.

5COMMKhi Led ny sng hin th vic trip c h tr bi tn hiu thng tin.

6SOFTKhi Led ny sng hin th vic trip do SOFT.

7PHASE AKhi Led ny sng hin th s c lin quan n pha A.

8PHASE BKhi Led ny sng hin th s c lin quan n pha B.

9PHASE CKhi Led ny sng hin th s c lin quan n pha C.

10GROUNDKhi Led ny sng s c chm t xy ra

11ZONE 1Khi Led ny sng hin th bo v khong cch vng 1 tc ng.




1550Khi Led ny sng hin th bo v qu dng ct nhanh tc ng.

1651Khi Led ny sng hin th bo v qu dng c thi gian tc ng.

1779 RESETKhi Led ny sng hin th rle ng lp li ang trng thi reset.

1879LOCKOUTKhi Led ny sng hin th rle ng lp li ang trng thi kho.

Hnh 3.3- Cc LED hin th trn mt trc t iu khin

+ Mt cng ni tip EIA-232 trn mt trc t rle k hiu l Port F dng kt ni vi cng EIA-232 ca my tnh c nhn phc v cho vic ci t v xem thng s.

Hnh 3.4- Cng EIA-232 trc t SEL-421

+ 8 nt nhn i km cc Led hin th nh hnh 3.5. Chc nng c th ca tng Led c th th hin trong Bng 3.2

Bng 3.2- Chc nng ca cc Led i km cc nt nhn

STTLED trn nt nhnChc nng

1SPT ENABLEKhi Led ny sng cho php ct mt pha.

2COMM

SCHEME ENABLEKhi Led ny sng hin th cho php s dng s truyn thng.

3ALT

SETTINGSCon tt gia nhm ci t 1 v 2a khi Led ny sng nhm 1 khng phi l nhm ci dt hot ng.

4RELAY TEST

MODEKhi Led ny sng rle ang trng thi kim tra.

5MANUAL CLOSE

ENABLEKhi Led ny sng cho php s dng vic ng my ct bng tay ti t rle.

6RECLOSE

ENABLEKhi Led ny sng cho php ng lp li.

7BREAKER

ENABLEKhi Led ny sng ng my ct 1(Nt nhn ng).

8BREAKER

OPENKhi Led ny sng my ct 1 m (Nt nhn ct).

Hnh 3.5 - Cc nt nhn trn mt trc t iu khin

b- Hng dn vn hnh ti t rle

Vic vn hnh mt trc t rle SEL-421 c thc hin thng qua mt dy cc menu, nhng menu bn quan st c trn m hnh LCD. MAIN MENU l mt menu m u cho cc menu khc nh hnh 3.6. Kt hp cc menu ny cho php bn truy cp cc gi tr o lng, iu khin v cc ci t cho cu hnh SEL-421 vi cc ng dng cn thit ca bn. S dng menu chnh v cc mn hnh ci t rle, iu khin ti ch v c thng s o lng.

b.1-Cc trang mn hnh h tr Contrast v Password

Mn hnh tng phn (Contrast)

- Rle hin th cc trang mn hnh c bit trn nh ca menu hoc trang mn hnh m bn ang s dng cho vic iu khin rle hoc xem d liu. Cc trang mn hnh ny l mn hnh iu chnh tng phn (Contrast) v m hnh mt khu PASSWORD.

- Bn c th iu chnh tng phn ca mn hnh LCD ph hp vi gc nhn ca bn v cc iu kin sng. thay i tng phn ca mn hnh, nhn nt nhn {ESC} v gi 1 giy. Rle hin th hp iu chnh tng phn ln mn hnh hin th. Nhn nt nhn mi tn sang phi tng tng phn. Nhn nt nhn mi tn sang tri gim tng phn ca mn hnh. Khi kt thc vic iu chnh tng phn mn hnh nhn nt nhn {ENT}.

Hnh 3.6- iu chnh tng phn mn hnh

Mn hnh mt khu (PASSWORD)

- SEL-421 s dng cc mt khu gim st vic truy cp n cc ci t v iu chnh cc menu. Mc truy cp thp nht ti t l mc truy cp 1, mt khu ch c hiu lc khi bn yu cu mt menu chc nng m menu c mc truy cp cao hn mc truy cp hin hnh. Lc o rle s hin th mt mn hnh nhp mt khu nh hnh 3.7. Mn hnh ny c mt vng mt khu cha trng v mt vng cha cc ch ci, con s v cc k t mt khu t bit.

Hnh 3.7- Mn hnh nhp mt khu

- Nhp mt khu bng cch s dng cc nt nhn iu chnh hng di chuyn hp sng n cc ch ci hoc con s cn chn, sau nhn nt nhn {ENT}. Rle nhp vo cc k t chn trong vng mt khu v di chuyn hp con chy mu en v pha phi. Bn c th li li vo bt k thi im no bng cch lm sng k t BACKSPACE v sau nhn {ENT}. Khi kt thc nhp mt khu vo bng cch lm sng k t ACCEPT v sau nhn {ENT}.

- Nu bn nhp vo mt mt khu hp l rle thay th mn hnh mt khu bng mt mn hnh menu.

- Nu bn nhp vo mt mt khu khng hp l rle hin th mn hnh bo li trn hnh 3.8. Nhp vo mt mt khu hp l cho mc truy cp thp hn mc truy cp yu cu rle cng pht ra mt mn hnh bo li. Trong c hai trng hp nhp mt khu khng thnh cng, rle khng thay i mc truy cp. Rle hin th mn hnh PASSWORD INVALID trong 5 giy. Nu bn khng mun ch cho rle g b li nhn, nhn bt k mt trong 6 nt nhn iu chnh hng v gi trong 5 giy xut hin li nhn bo li tr v mn hnh trc, mn hnh m bn ang lm vic.

Hnh 3.8- Mn hnh mt khu khng hp l

b.2- Menu chnh (MAIN MENU)

- Menu chnh gm cc menu con:

+ METER.

+ EVENTS.

+ BREAKER MONITOR.

+ RELAY ELEMENTS.

+ LOCAL CONTROL.

+ SET/SHOW.

+ RELAY STATUS.

+ VIEW CONFIGURATION.

+ DISPLAY TEST.

+ RESET ACCESS LEVEL.

- Khi mn hnh LCD trc t rle ang trng thi hin th mt nh. nhn nt nhn {ENT} hin th MAIN MENU nh hnh 3.9.

Hnh 3.9- Cu trc ca MAIN MENU

Menu METER

- SEL-421 hin th cc trang mn hnh o lng trn mn hnh LCD. Lm ni METER trn mn hnh MAIN MENU chn la menu ny. Menu METER trn hnh 3.10 cho php bn chn la cc mn hnh o lng sau y:

+ RMS METER.

+ FUNDAMENTAL METER.

+ DEMAND METER (nu c s dng).

+ ENERGY METER.

+ MAX/MIN.

+ SYNCHRONISM CHECK (nu c s dng).

Hnh 3.10 - Mn hnh menu METER

- Nu chc nng kim tra ng b v o yu cu khng c s dng mn hnh menu METER nh hnh 1.7.24

Hnh 3.11- Cu trc menu METER

- Cc kt hp ca Global, cc ci t ESS v NUMBK cung cp cho bn d liu o lng ca ng dy, my ct 1 v my ct 2 khi bn xem cc mn hnh o lng RMS METER, FUNDAMENTAL METER v MAX/MIN. Rle hin th METER SUBMENU nh hnh 3.12. Bn c th chn la d liu ng dy hoc my ct m bn mun hin th.

Hnh 3.12- Menu SUBMENU METER

- Rle hin th cc kiu mn hnh o lng c th hin trn mi ct ca Hnh 3.13 v Hnh 3.14. Mt khi bn chn la kiu d liu o lng hin th (RMS METER, FUNDAMENTAL METER, DEMAND METER, ENERGY METER, MAX/MIN, hoc SYNCHRONISM CHECK), bn c th cun t u n cui mt ct cn hin th bng cch nhn nt nhn mi tn hng xung. Tr li mn hnh trc xem trong mi ct bng cch nhn nt nhn mi tn hng ln. Nhn nt nhn {ESC} tr li vi cc trang mn hnh METER SUBMENU v METER MENU.

- Cc mn hnh o lng s hin th cc tu chn reset cho MAX/MIN, ENERGY METER, PEAK DEMAND METER v DEMAND METER ti cui mi ct mn hnh. S dng nt nhn mi tn sang tri v sang phi chn la NO hoc YES v sau nhn nt nhn {ENT} reset.

Hnh 3.13-Cc mn hnh o lng

Hnh 3.14- Cc mn hnh o lng

Hnh 3.15- Mn hnh o lng ENERGY, MAX/MIN v SYNCH CHECK Menu EVENTS

- Bn c th xem cc bo co s kin tm tt t mn hnh hin th trc t iu khin bng cch chn la EVENTS t MAIN MENU. Hnh 3.16 hin th v d cc mn hnh EVENT SUMMARY cho cc s c hai pha v hai pha chm t. S dng nt nhn mi tn sang phi v sang tri xem cc trang mn hnh ny.

- Cc thanh cun ngang hin th rng bn c th xem 10002 cc trang s kin khc. S dng nt nhn mi tn hng ln v hng xung di chuyn gia cc s kin. Nhn nt nhn {ESC} tr li MAIN MENU.

Hnh 3.16 - Cc trang mn hnh EVENT SUMMARY

Menu BREAKER MONITOR

Chn la BREAKER MONITOR t MAIN MENU xem s liu cnh bo vic gim st my ct trn mn hnh LCD trc t iu khin. Hnh 3.17 trnh by v d cc trang mn hnh gim st my ct. Mn hnh BKR n ALARM COUNTER hin th s ln my ct vt qu ngng cnh bo. Nu bn c hai my ct v ci t NUMBK:=2, mn hnh ALARM SUBMENU xut hin u tin. S dng cc nt nhn iu chnh hng chn la mt trong hai my ct 1 hoc my ct 2. Nhn nt {ENT} xem cc thng tin gim st v my ct c chn. Mt v d v mn hnh ALARM COUNTER my ct 1 cho vic trip mt pha c th hin trn hnh 1.7.30 pha bn phi.

Hnh 3.17- Cc trang mn hnh gim st my ct

Menu RELAY ELEMENTS

- Bn c th xem mn hnh RELAY ELEMENTS kim tra tnh trng ca cc Relay Word bit trong SEL-421.

- Hnh 3.18 hin th mt v d ca mn hnh RELAY ELEMENTS. Du (*) trn hnh 3.18 hin th rng v tr Relay Word bit ny d phng cho vic s dng trong tng lai.

Hnh 3.18- Mn hnh RELAY ELEMENTS

- Kiu tm kim cho php bn tm thy mt phn t rle hin th nhanh chng. Hnh 3.19 hin th mn hnh menu khi bn chn tu chn SEARCH ca menu RELAY ELEMENTS ban u. u tin bn vo menu Search, khi con chy nm ti im bt u ca vng tn phn t v hp sng nm trong vng k t ch ci v s bao quanh k t A. S dng cc nt nhn iu chnh hng di chuyn t u n cui cc k t ch ci v s. Lm ni k t c chn sau nhn nt nhn {ENT} nhp k t vo v tr khi con chy trong vng tn phn t. Tip theo, khi con chy t ng di chuyn n k t cha trng v pha phi. li con chy trong vng tn ca phn t, di chuyn hp sng n BACKSPACE v nhn nt nhn {ENT}. Khi bn kt thc vic nhp tn ca mt phn t di chuyn hp sng n ACCEPT v nhn nt nhn {ENT}. Rle s tm kim tn ca phn t nhp vo. Nu vic tm kim khng tho ng mn hnh hin th mt thng ip bo li v tr li mn hnh ELEMENT SEARCH. Nu vic tm kim tho on mn hnh hin th phn t, dng cha phn t. Ti bt k thi im no nhn nt nhn {ESC} tr li mn hnh RELAY ELEMENTS

Hnh 3.19- Mn hnh SEARCH ELEMENT

Menu LOCAL CONTROL

- Bn c th s dng menu LOACL CONTROL thc hin cc chc nng sau y ca rle:

+ Trip v ng cc my ct.

+ Xc nhn, khng xc nhn v xung u ra iu khin rle n cc hot ng iu khin trm.

+ Kim tra cc u ra rle.

- Trong menu LOCAL CONTROL u tin nh hnh 3.9, bn c th chn BREAKER CONTROL, LOCAL BITS CONTROL hoc OUTPUT TESTING. Bn phi lp t jumper cho php iu khin my ct v kim tra u ra. Trnh n ph s khng hin th tu chn BREAKER CONTROL v tu chn OUTPUT TESTING nu jumper my ct khng c lp t. Nu jumper my ct khng c lp t v khng c cc bit ti ch no c s dng, rle s hin th mt thng ip khi bn vo LOCAL CONTROL v mn hnh tr li MAIN MENU sau mt thi gian tr.

- Tn cc bit ti ch m nhng bit ny bn lp trnh, xut hin trong vng cc tn bit ti ch gia BREAKER CONTROL v OUTPUT TESTING. S dng cc nt nhn mi tn hng ln v hng xung lm ni vic iu m bn mun thc hin. Nhn nt nhn {ENT} s a bn n mn hnh LOCAL CONTROL.

Hnh 3.20- Menu LOCAL CONTROL ban u

BREAKER CONTROL

- Vic chn la BREAKER CONTROL lm xut hin mt trnh n ph chn la my ct. Nu NUMBK:=2. S dng cc nt nhn iu chnh hng v nt nhn {ENT} chn my ct m bn mun iu khin.

Hnh 3.21-Cc mn hnh BREAKER CONTROL

- Hnh 3.21 th hin trnh n ph BREAKER CONTROL v cc mn hnh iu khin my ct 1. S dng cc nt nhn mi tn hng ln v hng xung lm ni cng vic iu khin ct hoc ng my ct. Khi bn lm ni tu chn ct my ct v nhn {ENT}, rle hin th thng ip xc nhn vic xut lnh m my ct (OPEN COMMAND ISSUED) v ct my ct 1. Trng thi my ct 1 (BREAKER 1 STATUS) thay i n OPEN.

- Khi bn lm ni tu chn ng v nhn {ENT}, rle hin th thng ip xc nhn ng my ct (CLOSE COMMAND ISSUED) v ng my ct1. Trng thi my ct 1 (BREAKER 1 STATUS) thay i n CLOSED.

Cc bit iu khin ti ch

- SEL-421 c 32 bit iu khin ti ch. Nhng bit ny thay th vic iu khin trm bng tay vi s lm vic ca cc kho chuyn i, chn hn nh kho chuyn i thanh ci. SEL-421 lu cc trng thi ca cc ti ch trong b nh c nh v phc hi trng thi cc bit ny khi rle c cp ngun.

- Bt k bit ti ch no khng c s dng s c mt nh vi trng thi logic 0.

- Hnh 3.22 trnh by mt v d iu khin bng cch s dng cc menu LOCAL CONTROL. Mn hnh LCD hin th mt gin m t vic iu khin trm bng tay. Nu cc bit ti ch khng c ci t, v tr kho chuyn i trn hnh 3.22 ng vi s 0. Nu cc bit ti ch ci t tng ng nhn mc logic 1, v tr kho chuyn i trn hnh 3.22 ng vi s 1.

Hnh 3.22- Cc menu v d iu khin ti ch.

- Bn c th lp trnh tn hoc cc k hiu cho cc trng thi bit ti ch b trng v ci t. Tn v cc k hiu xut hin ngay sau logic 0 v logic 1 nh v d mn hnh Bus Tie Interlock trn Hnh 3.22. S dng cc nt nhn mi tn hng ln v hng xung lm ni vic iu khin ci t (tng ng mc logic 1) v b trng tng ng mc logic 0. Lm ni tu chn ci t (hin th trn hnh 3.22 Closed (OK to TIE)) v nhn {ENT} thay i bit ti ch v thc hin yu cu hot ng iu khin. Kho chuyn i chuyn n mc 1 hin th trng thi bit ti ch mi.

Menu SET/SHOW - Bn c th s dng cc menu SET/SHOW xem hoc hiu chnh cc ci t PORT, GLOBAL, ACTIVE GROUP v DATE/TIME.

- Hnh 3.23 th hin cch nhp vo ci t CTRW t mt trc t iu khin. Ti MAIN MENU, chn mc SET/SHOW v nhn {ENT}. Mn hnh LCD hin th trang SET/SHOW nh hnh 3.23. S dng cc nt nhn iu chnh hng chn la cc loi ci t PORT (PORT 1, PORT 2, PORT 3, PORT F v PORT 5), GROUP (t 1 n 6 v M) v GLOBAL hoc thay i nhm ci t hot ng ACTIVE GROUP=n (n t 1 n 6) hoc DATE/TIME.

- Trn mn hnh GROUP di chuyn hp sng n s 3 v nhn {ENT}. Tip tc chn loi ci t. Trnh n GROUP trn hnh 3.23 l mt v d ci t loi Group 3. Mt khi bn lm ni mc ci t, nhn nt nhn {ENT} rle s hin th cc ci t ring trong cc mc . Trang mn hnh LINE CONFIGURATION trn hnh 3.23 th hin cc ci t v cu hnh ng dy.

- hiu chnh hoc xem mt ci t s dng cc nt nhn mi tn hng ln v hng xung lm ni ci t , sau nhn {ENT}. Rle s hin th cc gi tr ci t hin ti (xem ci t CTRW trn hnh 3.23).

- Nu s liu bn nhp vo hp l (nm trong phm vi cc ci t), mn hnh LCD s hin th tr li trang mn hnh cc mc ci t, trang mn hnh ny hin th cc gi tr ci t hin ti. Nu s liu nhp vo khng hp l, rle hin th mt mn hnh vi thng ip bo li, sau tr li vi cc ci t ring v vy bn c th th nhp cc gi tr ci t hp l.

- Khi kt thc vic nhp cc s liu ci t mi, nhn nt nhn {ESC}. Rle nhc bn vi mt trang mn hnh lu cc ci t. S dng cc nt nhn iu chnh hng, tr li YES thc hin vic thay i cc ci t hoc NO b qua cc ci t thay i.

Hnh 3.23- Cc trang mn hnh ci t/xem cc gi tr ci t

- SEL-421 hin th cc ci t khc trn cc trang mn hnh ph thuc vo cc kiu ci t. Cho v d vic ci t CTRW trn Hnh 3.24 rle cn n cc k t ch ci v con s u vo. Cc ci t khc c th c cc yu cu s d liu u vo khc.

Cc ch ci & con s Cc k t hoc dng Cc la chn ci t

k t

Hnh 3.24 - V d cc trang mn hnh u vo ci t

Menu ACTIVE GROUP

- Thc hin cc bc sau y thay i nhm ci t hot ng:

+ Bc 1 chn la tu chn ACTIVE GROUP ca trnh n SET/SHOW trn hnh 3.25 thay i nhm ci t. Rle thc hin vic kim tra s hp l ca mt khu xc nhn rng bn c quyn truy cp mc B hoc mc cao hn.

+ Bc 2 nu vic truy cp c cho php v tt c cc kt qu ca cc phng trnh iu khin SELOGIC SS1 n SS6 khng mc logic 1( c xc nhn), sau rle hin th trang mn hnh EDIT ACTIVE GROUP trn hnh 1.7.38. Rle hin th nhm ci t hot ng v ng gch di nm sau NEW GROUP =.

+ Bc 3 S dng cc nt nhn mi tn hng ln v hng xung tng hoc gim s NEW GROUP.

+ Bc 4 mt khi bn chn la mt nhm ci t hot ng mi, nhn nt nhn {ENT} thay i cc ci t ca rle n mt nhm ci t mi.

Hnh 3.25- Thay i nhm ci t hot ng (ACTIVE GROUP).

Menu DATE/TIME (Ghi ch vn hnh khng truy cp vo menu ny)

- Mt trnh n khc ca trang mn hnh SET/SHOW u tin trn hnh 3.26 l mn hnh DATE/TIME. SEL-421 xut ra thng tin ngy gi v thi gian bn trong rle hoc bn c th s dng cc kiu thi gian bn ngoi c chnh xc cao. Hnh 3.26 l trang mn hnh ngy thng /thi gian ca rle khi mt ngun thi gian c chnh xc cao c s dng. Nu bn s dng ngun thi gian c chnh xc cao, vic hiu chnh b v hiu ho.

Hnh 3.26- Mn hnh DATE/Time

- Khi rle lm vic vi ngun thi gian khng c chnh xc cao, bn c th s dng cc trang mn hnh DATE v TIME ci t ngy thng v thi gian. Hnh 3.27 trnh by mt v d ca cc mn hnh hiu chnh thi gian. S dng cc nt nhn iu chnh hng sang tri v sang phi di chuyn con tr kiu ng gch di; s dng cc nt nhn iu chnh hng ln v xung tng hoc gim con s ngy thng v thi gian ph hp vi ngy thng v thi gian ci t.

Hnh 3.27 -Trang mn hnh hiu chnh ngy thng v thi gian

Menu RELAY STATUS- SEL-421 lin tc thc hin vic t kim tra phn cng v phn mm. Nu c bt k nguy him n h thng trong rle dn n iu kin hng hc, rle xut ra mt trng thi cnh bo. Nu rle pht hin mt h hng, rle s hin th trng thi h hng ngay lp tc ln mn hnh LCD.

- C hai iu kin cnh bo hoc hng hc, rle hin th mt thng ip bo li h thng hoc chc nng. Bn c th truy cp trang mn hnh RELAY STATUS thng qua MAIN MENU. Trang mn hnh RELAY STATUS hin th con s nhn dng chng trnh c s (FID), s th t sn phm, rle c s dng hoc b v hiu ho v bt k cc trng thi cnh bo.

- Hnh 3.28 trnh by v d v mt trang mn hnh RELAY STATUS khi bo v trng thi bnh thng v mt trang mn hnh RELAY STATUS trng thi cnh bo.

Bnh thng

Trng thi cnh bo Trng thi h hng

Hnh 3.28- Cc trang mn hnh trng thi ca rle

Menu VIEW CONFIGURATION

Ti mt trc t iu khin bn c th xem chi tit thng tin v cu hnh ca chng trnh c s v cc b phn phn cng trong SEL-421. Trong menu chnh MAIN MENU, lm ni tu chn VIEW CONFIGURATION bng cch s dng cc nt nhn iu chnh hng. Rle hin th 5 trang mn hnh nh Hnh 3.29. S dng cc nt nhn iu chnh hng cun t u n cui cc trang mn hnh ny. Khi kt thc vic xem cc trang mn hnh ny, nhn nt nhn {ESC} tr li MAIN MENU.

Hnh 3.29- V d cc trang mn hnh VIEW CONFIGURATION

Meu DISPLAY TESTBn c th s dng tu chn DISPLAY TEST ca MAIN MENU xc nhn s lm vic ca tt c cc nh im ca mn hnh LCD. Mn hnh LCD xen k trng thi on/off ca cc im nh hin th mi khi bn nhn nt nhn {ENT}. Hnh 3.30 hin th kt qu kt qu hai trang mn hnh. Tu chn DISPLAY TEST cng lm sng tt c cc LED trn mt trc t iu khin. thot kiu kim tra nhn nt nhn {ESC}.

Hnh 3.30- Cc trang mn hnh DISPLEY TEST

Menu RESET ACCESS LEVEL

- SEL-421 s dng cc mt khu khc nhau gim st vic truy cp n cc chc nng t mt trc t iu khin. Khi bn tin hnh trn cc menu ny, rle pht hin s tn ti mt khu ca mc truy cp v nhc bn nhp mt khu hp l trc khi cho php bn truy cp n mc cao hn mc truy cp 1. Khi bn mun tr mc truy cp thp hn (mc truy cp 1) t mt trc t rle, lm ni mc RESET ACCESS LEVEL trn MAIN MENU. Nhn {ENT} ngay lp tc rle hin th trang mn hnh nh Hnh 3.31 v mc truy cp hin ti l mc truy cp 1.

Hnh 3.31- Trang mn hnh RESET ACCESS LEVEL

c- Vn hnh cc nt nhn trn mt trc t iu khin

- Nt nhn SPT ENABLE

Nhn nt nhn iu khin ny cho php/v hiu ho vic ct mt pha. Khi chc nng ct mt pha c s dng n Led trn nt nhn SPT ENABLED sng.

- Nt nhn COM SCHEME ENABLE

Nhn nt nhn iu khin ny cho php s dng/v hiu ho vic ct c h tr truyn thng. Khi chc nng ny c s dng n Led trn nt nhn COMM SCHEME ENABLED sng.

- Nt nhn ALT ENABLE

Nhn nt nhn iu khin ny trong khong thi gian 3 giy thay i nhm ci t hot ng gia nhm ci t chnh (nhm ci t 1) v nhm ci t thay th (nhm ci t 2). p ng tng ng n Led trn nt nhn ny sng.

- Nt nhn RELAY TEST MODE

Nhn nt nhn ny cho php s dng/v hiu ho vic kim tra ca rle. p ng tng ng n Led trn nt nhn RELAY TEST MODE sng.

- Nt nhn MANUAL CLOSE ENABLE

Nhn nt nhn ny cho php s dng/v hiu ho vic ng my ct ti mt trc t iu khin ti ch. p ng tng ng n Led trn nt nhn MANUAL CLOSE ENABLE sng.

- Nt nhn RECLOSE ENABLE

Nhn nt nhn ny cho php s dng hoc v hiu ho chc nng t ng ng lp li. p ng tng ng n Led trn nt nhn RECLOSE ENABLE sng.

- Nt nhn BREAKER CLOSED

Nhn nt nhn ny ng my ct 1. p ng tng ng n Led trn nt nhn BREAKER CLOSED sng hin th my ct 1 c ng. Chc nng ca nt nhn MANUAL CLOSE ENABLE trn cho php s dng hoc v hiu ho nt nhn BREAKER CLOSED.

- Nt nhn BREAKER OPEN

Nhn nt nhn ny ct my ct 1. p ng tng ng n Led trn nt nhn BREAKER OPEN sng hin th rng my ct 1 c m.

3.3.1.3- SEL-279Ha-Gii thiu v mt trc t rle SEL-279H

- Mt trc t rle SEL-279H c gm:

+ Mt cng ni tip EIA-232, cng ny c s dng kt ni vi cng EIA-232 ca my tnh c nhn phc v cho vic giao tip gia ngi v SEL-279H thng qua my tnh c nhn.

+ Mt nt nhn TARGET RESET/LAMTEST, khi nt ny c nhn 8 n Led trn mt trc t iu khin sng trong thi gian 1 giy kim tra n Led v hin th rng rle ang trng thi sn sng lm vic.

+ 8 n Led hin th, chc nng ca cc Led c trnh by trong bng 3.3.

Bng 3.3- Cc Led hin th trn SEL-279HSTTTn LEDM t

1STATUSBK1Led BK1 sng nu u vo trng thi my ct c ch nh cho my ct 1 v my ct 1 ng.

BK2Led BK1 sng nu u vo trng thi my ct c ch nh cho my ct 2 v my ct 2 ng.

2RECLOSEBK1Led BK1 sng nu vic ng lp li c ch nh cho my ct 1

BK2Led BK2 sng nu vic ng lp li c ch nh cho my ct 2

3RSKhi Led ny sng hin th rle ng lp li ang trng thi reset

3CYKhi Led ny sng hin th rle ng lp li ang trng thi chu k.

5LOKhi Led ny sng hin th rle ng lp li ang trng thi kho.

6MAN/CLSKhi Led ny sng hin th vic ng bng tay my ct 1 hoc 2 thng qua rle SEL-279H.

Hnh 3.33- Mt trc ca SEL-279H

3.3.1.4- Rle SEL-311L

Hnh 3.34-Mt trc ca SEL-311La- Gii thiu v mt trc t rle SEL-311L

- Mt trc t iu khin SEL-311L gm c:

+ 16 n LED hin th nh hnh 3.35. Chc nng ca cc LED c trnh by trong bng 3.4.

Hnh 3.35- Cc LED hin th trn mt trc t iu khin SEL-311L

Bng 3.4- Gii thch cc LED trn mt trc t iu khin

STTTn LEDGii thch

1ENKhi LED ny mu xanh rle c a vo s dng, Khi LED ny mu rle b v hiu ho.

2TRIPKhi LED ny sng hin th vic Trip xy ra do bt k mt phn t bo v hoc iu khin no.

3TIMEKhi Led ny sng hin th vic ct do cc phn t c thi gian tr.

4COMMKhi Led ny sng hin th vic ct do tn hiu truyn thng.

587Khi Led ny sng hin th vic ct do phn t so lch ng dy tc ng.

650/51Khi Led ny sng hin th vic ct do phn t qu dng ct nhanh/c thi gian.

71Khi Led ny sng hin th vic ct do phn t cp 1.



10AKhi Led ny sng hin th s c xy ra trn pha A.

11BKhi Led ny sng hin th s c xy ra trn pha B.

12CKhi Led ny sng hin th s c xy ra trn pha C

13GKhi Led ny sng hin th xy ra s c chm t.

14RSKhi Led ny sng hin th vic ng lp lo trng thi Reset.

15LOKhi Led ny sng hin th vic ng lp lo trng thi kho

1687 CH FAILKhi Led ny sng hin th knh tn hiu ca bo v so lch dng in ng dy b h hng.

+ 8 nt nhn a chc nng, mt mn hnh LCD, mt cng kt ni EIA-232. Chi tit tham kho hng dn vn hnh SEL-387E chuyn rle bo v my bin p chnh.b- Hng dn vn hnh cc nt nhn trn mt trc t rle

- Tham kho hng dn vn hnh SEL-387E chuyn rle bo v my bin p chnh- Ring i vi nt nhn {OTHER} cn c s dng xem s hot ng b m s ln ng ca rle ng lp li v c th s dng kho ch cun mn hnh. C th nh sau:

+ Nhn nt nhn {OTHER} mn hnh sau y xut hin:

+ S dng nt nhn mi tn cun sang phi v chn la chc nng 79 bng nt {SELECT}, mn hnh sau y s xut hin:

hoc

+ Nu chc nng ng lp li b v hiu ho. Mn hnh hin th nh sau:

+ p ng tng ng cc ci t nhn mc l:

79LL = SET RECLOSURES (Nhn ng ln cui b gii hn ti a 14 k t).

79SL = RECLOSE COUNT (Nhn m s ln ng b gii hn ti a 14 k t).

+ Nu c hai 79LL v 79SL khng c ci t nhn, mn hnh sau y s xut hin:

+ Cc nhn mc c ci t bng lnh SET T hoc c xem vi lnh SHO T.

+ Con s dng trn cng trn mn hnh v d trn (SET RECLOSURES = 2) tng ng vi gi tr ng lp li ln cui.

+ Con s dng cui trn mn hnh v d trn (RECLOSE COUNT = 0 hoc RECLOSE COUNT = 2) tng ng vi gi tr ng hin ti. Nu my ct c ng v rle ng lp li c reset (n Led trn mt trc t iu khin sng) RECLOSE COUNT = 0. Nu my ct m v rle ng lp li b kho sau mt trnh t ng lp li (Led LO trn mt trc t rle bo v sng) RECLOSE COUNT = 2.

c- Mt khu truy cp khi vn hnh cc nt nhn ti t Tham kho hng dn vn hnh SEL-387E chuyn rle bo v my bin p chnh3.3.2- Vn hnh thng qua my tnh c nhn

S dng my tnh c nhn IBM c trang b phn mm ACSELERATOR QUICKSet SEL-5030 kt ni cng RS232 ca my tnh c nhn vi cng RS232 ca rle SEL. Vic kt ni phi s dng cp tiu chun ca nh ch to chi tit xem s tay hng dn vn hnh.

Hnh 3.36- minh ho vic kt ni gia SEL- vi my tnh c nhn

Vic giao tip c thc hin thng qua vic s dng cc tp lnh ca SEL chi tit v cc tp lnh xem s tay hng dn vn hnh.

3.4- Phn mm giao tip ACSELERATORQUICKSet SEL-5030

Phn mm ACSELATOR QUICKSET SEL-5030 l mt cng c mnh v d dng s dng h tr cho hu ht cc rle SEL.

S dng phn mm ACSELERATORQUICKSet SEL-5030 bn c th:

- To, kim tra v qun l cc ci t vi giao din Windows:

+ To cc ci t cho mt hoc nhiu rle SEL.

+ Lu tr v phc hi cc ci t vi mt my tnh c nhn tng thch.

+ Ti ln hoc xung cc file ci t n hoc t rle SEL.

- Phn tch cc s kin:

+ S dng cc cng c tch hp phn tch dng sng v sng hi.

- Gim st thi gian thc v d liu v h thng nng lng c lu tr trong SEL.

- iu khin rle:

+ Lm vic vi rle bng cch s dng mi trng giao tip ho.

+ Xc nhn cc lnh rle qua cng ni tip EIA-232.

- Cu hnh cng ni tip v cc mt khu: SEL cung cp phn mm ACSELERATORQUICKSet c cu hnh tin li v rt hiu qu cho vic ci t, o lng v iu khin. Phn mm ny cung cp cho bn nhng tin li trong vic kim tra cc ci t, xy dng cc phng trnh iu khin SEL logic, gim st o lng HMI v phn tch s kin.

3.4.1- Cc yu cu v h thng vi phn mm ACSELERATOR QuickSet

- CPU: Loi Pentium, yu cu tc ti thiu 90MHz.

- H thng vn hnh/RAM:

+ Windows 98/ME/XP vi b nh RAM ti thiu 64MB.

+ Microsoft Windows 2000 vi b nh RAM ti thiu 64MB.

+ Microsoft Windows NT vi b nh RAM ti thiu 32MB.

- a cng: C khong trng t nht 100MB.

- Cng giao tip: S dng cng giao tip EIA-232 hoc mt cng Ethernet.

- Cc a khc: CD-ROM s dng cho vic ci t.

- Mn hnh: SVGA c phn gii 800x600 pixel hoc ln hn.

3.4.2- Ci t

Phn mm ACSELERATOR QuickSet c th c ci t theo hai phng php sau:

- Phng php A: T ng ti phn mm ACSELERATOR QuickSet

+ M my tnh PC v chy chng trnh Windows.

+ ng tt c cc ng dng trn my tnh PC ca bn.

+ Chn a CD cha phn mm ACSELERATOR QuickSet vo a CD-ROM my tnh PC ca bn. Vic ci t phn mm s t ng chy v xut hin License Agreement nh Hnh 3.37:

Hnh 3.37- Hp thoi License Agreement

- Phng php B: Ti phn mm ACSELERATOR QuickSet bng lnh RUN trong chng trnh Windows:

+ Nu chng trnh Setup khng t ng chy, nhp Start>RUN ti ACSELERATOR QuickSet.

+ Kiu lnh th hin Hnh 3.38:

Hnh 3.38- Kiu lnh chy chng trnh

y a D:\ tng ng vi CD-ROM trn my tnh PC ca bn.

+ Xut hin cc License Agreement.

+ c Software License Agreement v sau ti cc ch dn khi cc ch dn ny xut hin trn mn hnh my tnh PC.

Chng trnh ci t s thc hin tt c cc bc cn thit ti phn mm ACSELERATOR QuickSet vo my tnh c nhn ca bn.

Cn thit phi c file comctl32.dll c ci t trn my tnh c nhn ca bn lm xut hin cc nt nhn thah cng c. Nu bn khng nhn thy cc nt nhn thanh cng c chy file 40ComUpd.exe, c ci t trong th mc ci t. File ny s ci t ng cc tp tin cn thit trn h thng Windows.

a- Khi ng phn mm ACSELERATOR QuickSet

Bn c th khi ng phn mm ACSELERATOR QuickSet theo cc cch sau y:

- Phng php 1: Nhp i vo biu tng ACSELERATOR QuickSet nu bn c mt shortcut trn desktop.

- Phng php 2: Chn Programs> SEL Application v chn biu tng phn mm ACSELERATOR QuickSet khi ng chng trnh.

b- Cc tham s giao tip

S dng hp thoi Communication Parameters nh cu hnh cc ci t giao tip vi rle. Chn Communication >Parameters t thanh cng c ACSELERATOR QuickSet m hp thoi ny. Hp thoi Communication Parameters nh Hnh 3.39:

Hnh 3.39- Hp thoi Communication Parametersc- Ci t cng ni tip

Bn c th giao tip vi rle qua PORT1, PORT2, PORT3 v PORT F (mt trc t rle). Hnh 3.39 th hin cc tham s mt nh ca cng ni tip (9600, 8, N,1). Nhp cc mt khu cho rle trong cc hp text Level One v Level Two.

Nu bn chn mt thit b t hp text Device m hp text l mt modem telephone, nhp vo hp text Phone Number s in thoi.

d- Ci t FPT

- Nhp vo hp Use Network truy cp Network Parameters. Hnh 3.40 hin th hp thoi Network Parameters. Cho FPT s dng Telnet Port s 23.

Hnh 3.40- Hp thoi Network Parameters

- Khi bn kt ni vi mt rle s dng FPT, bn phi xc nhn mc truy cp v mt khu.

- Nhp lnh truy cp mc (v d ACC, 2AC) trong hp text User ID v mt khu truy cp mc tng ng trong hp thoi Communication Parameters

- Mt nh Telnet Port Number cho vic truy cp rle l T1PNUM:=23. Mt nh Telnet Port Number cho vic giao tip trc tip vi mt card Ethernet c ci t l T2PNUM:=1024.

Hnh 3.41- Hp thoi Network Parameters

3.4.3-Cc ci t qun l c s d liu v cc aa- Qun l c s d liu

Phn mm ACSELERATOR QuickSet s dng mt c s d liu rle lu tr cc ci t cho rle. Phn mm ny cha cc ci t ca tt c cc file ci t cho mi rle, nhng file ny bn ch nh trong Database Manager.

Chn cc phng php lu gi bn sao d phng thch hp v mt v tr m bo cho vic lu tr cc file c s d liu ca rle bn. S dng menu File>Active Database phc hi mt c s d liu rle t b nh ca my tnh.

b-C s d liu rle

File c s d liu mt nh c nh dng trong phn mm l Relay.rdb. C s d liu ny c th cha cc file v d ci t cho cc sn phm SEL, nhng file bn c th s dng vi phn mm.

Thc hin cc bc sau truy cp v/hoc hiu chnh c s d liu:

- M Database Manager.

- Nhp File>Database Manager trn thanh cng c ca phn mm ACSELERATOR QuickSet. Mt hp thoi tng t nh Hnh 3.42 xut hin:

Hnh 3.42- Hp thoi Database Manager

Nhp vo cc m t c s d liu cho mi rle trong cc hp thoi Database Description v Relay Description.

Kiu hp thoi Relay Description hin th cc k t m nhng k t ny m t cc ci t ca rle. Nhng ci t ny c th bao gm: cc ci t s bo v v cc ci t giao tip.

Thc hin cc bc sau y to mt ci t mi cho rle:

- Lm ni mt trong cc rle c lit k trong mc Relay in Database v nhp Copy. Phn mm gi cho bn t mt tn mi.

- Nhp vo mt m t mi trong Relay Description.

c- Sao chp/di chuyn cc c s d liu gia cc rle

Bn c th to nhiu c s d liu vi Database Manager; nhng c s d liu ny hu dng cho nhm c cc s bo v tng t nhau.

Thc hin cc bc sau y sao chp/di chuyn c s d liu gia cc rle:

- Chn tap Copy/Move Relay Between Database truy cp hp thoi c hin th trn Hnh 3.42

- Nhp Open B m mt c s d liu rle.

- Chn tn file v nhp Open; cho v d Relay2.rdb l c s d liu rle B.

- Lm ni mt rle trong danh mc Database, chn Copy hoc Move v nhp nt nhn > to mt rle mi trong Database B

+ Copy to mt nhn dng rle m rle ny xut hin trong c hai c s d liu.

+ Move di chuyn rle t mt c s d liu v t vo mt c s d liu khc.

- Ngc li vic x l ny sao chp hoc di chuyn cc rle t Database B n Database A.

Hnh 3.43- Hp thoi Database Manager

Thc hin cc bc sau y to v sao chp mt c s d liu sn c ca cc rle thnh mt c s d liu mi:

- Chn File>Database Manager truy cp hp thoi Database Manager.

- Chn Copy/Move Ralays Between Database trong hp thoi Database Manager. Phn mm m cc c s d liu hot ng sau cng v ch nh n l Database A.

- Nhp nt nhn Open B. Phn mm gi bn v v tr file.

- Kiu mt tn c s d liu mi, nhp nt nhn Open v tr li Yes. Chng trnh to ra mt c s d liu mi cn trng.

- Ti cc rle vo c s d liu mi tng t nh vic Copy/Move Relay Between Databases.

d-M cc ci t

Mc menu Open dng m mt rle hin ti t th mc c s d liu hot ng. ACSELERATOR QUICKSET gi bn vi mt th mc cha cc ci t rle ti vo Relay Editor.

Hnh 3.44- Hp thoi Open Relay

e- c cc ci t

Khi bn la chn mc menu Read, ACSELERATOR QUICKSET c cc ci t ca rle t mt rle c kt ni. Khi ACSELERATOR QUICKSET c d liu t rle, mt hp thoi tng t nh hnh di y xut hin.

Hnh 3.45- Hp thoi Transfer Status- S dng hp thoi Relay Edition nhp vo cc ci t rle. Hnh 3.46 minh ho cc tnh nng chnh ca trnh son tho ny. Cc tnh nng ny bao gm s phin bn driver ca cc ci t ACSELERATOR QUICKSET gc tri pha di ca hp thoi Relay Editor.

Hnh 3.46- ACSELERATOR QUICKSET Relay Editor

f-Nhp vo cc ci t

- Nhp vo du + v cc nt nhn trong Settings Tree View m rng v chn la cc loi ci t, v d v hng mc m bn mun thy i.

- S dng hoc nhp vo hp thoi hiu chnh cc ci t.

- Nhp chut phi thc hin hai chc nng c bit khi bn hiu chnh cc ci t: Previous Value v Default Value. phc hi li gi tr trc cho mt ci t, nhp chut phi vo setting v chn Previous Value. Nhp chut phi vo hp thoi ci t v chn Default Value nu bn mun phc hi gi tr ci t mc nh ca nh sn xut.

3.4.4-Phn tch cc s kin

ACSELERATOR QUICKSET tch hp cc cng c phn tch, cc cng c ny h tr bn truy li thng tin v s lm vic ca h thng bo v mt cch nhanh chng v d dng. S dng thng tin s kin ca h thng bo v m SEL lu tr nh gi s lm vic ca h thng bo v.

a- Cc dng sng

SEL-421 ghi tt c cc trng hp ngt s c v cc trng thi vn hnh khc ca h thng in m bn lp trnh trong cc phng trnh iu khin SELogic. Rle ny cung cp hai kiu sao chp s kin: sng dao ng c phn gii cao. S dng ACSELERATOR QUICKSET xem dng sng dao ng vi ng phn gii cao v dng sng s kin, s pha, cc phn tch sng hi v cc ci t.

b- c cc lch s s kin

Bn c th truy li cc tp tin s kin ca rle v chuyn cc tp tin ny n PC ca bn. ti cc file s kin rle, m menu ACSELERATOR QUICKSET nh ca thanh cng c ACSELERATOR QUICKSET v nhp vo View Event History. Hp thoi Event History xut hin.

Hnh 3.47- Hp thoi Event History c- Ly s kin

- Tin hnh cc bc sau xem cc s kin:

+ Bc 1: T sng s kin bn mun xem v nhp vo nt Get Selected Event. thc hin bc ny, chn COMTRADE hp thoi Event Type chn dng sng dao ng vi phn gii cao. Hoc chn CEV 4mu/chu k v CEV 8 mu/chu k, m tng ng vi 4 hoc 8 mu/chu k cc bng ghi s kin ca rle.

+ Bc 2: Khi vic ti hon thnh, ACSELERATOR QUICKSET yu cu bn lu tp tin ny trn my tnh c nhn ca bn.

+ Bc 3: Mt khi tp tin ny c lu, nhn vo nt Close, sau chn menu Analysis v nhp vo View Event Files.+ Bc 4: M file dng sng dao ng bn va lu. Cn thay i la chn ca Files of Type xem cc file COMTRADE bng lit k file.

+ Bc 5. ACSELERATOR QUICKSET hin th hp thoi Event Waveform v biu dao ng ca s kin . Bn c th xem thng tin v mu thi gian vi chnh xc cao trn biu dao ng ca s kin.

Khi xem li biu dao ng ca s kin, s dng cc phm chc nng bn phm o lng thi gian ca biu dao ng hin hnh. Cc phm chc nng ny v cc chc nng lin quan tr gip trong vic phn tch s kin.

: Tin n bng bo

: Con tr 1

: Con tr 2

Mn hnh hin th s khc nhau v thi gian gia con tr v .

+ Bc 6. Nhp vo nt Pref bn di ca biu dao ng v chn Time (di Time Units, Starting/Ending Row).

+ Bc 7. Nhp OK.

+ Bc 8. Nhp vo bt k im no trn gin quan st Event Time microgiy ca d liu bn di ca gin dao ng.

Hnh 3.48- Ca s dng sng ca s kin ACSELERATOR QUICKSET

Hnh 3.49- Mu gin dao ng ca s kin

+ Bc 9. T hp thoi Event Waveform, chn menu View.

+ Bc 10. Nhp vo Phasors nh Hnh 3.50 xem mt mu hin th cc gi tr pha. Mt hin th pha tng t nh Hnh 3.51

Hnh 3.50- Truy li cc dng sng ca bng ghi s kin

Hnh 3.51 -Mn hnh gin pha

- ACSELERATOR QUICKSET cng cho mt phn tch sng hi ca d liu h thng in di dng ho COMTRADE. Tin hnh theo cc bc sau y:

+ Bc 1. T menu Event Waveform View, nhp vo Harmonic Analysis. Mt ca s tng t Hnh 3.52 xut hin.

Hnh 3.52- Mn hnh hin th cc phn tch sng hi ca s kin

+ Bc 2. bn tri ca mn hnh Harmonic Analysis chn knh in p v dng in ca rle gim st ton b sng hi.Bn c th xem c gin phn tch quang ph v th thanh phn tch sng hi.

+ Bc 3. Nhp vo cc hng ca hp thoi Data Scroll hoc #Cycles thay i phm vi phn tch d liu.

+ Bc 4. Nhp vo menu Summary Data on the Event Waveform View xem thng tin tm tt s kin.

Hnh 3.53- Mn hnh ca bn tm tt s kin

+ Bc 5. Nhp vo Settings menu Event Waveform View xem cc ci t ca rle m c kch hot cng lc vi s kin .

Hnh 3.54 - Mn hnh Settings ca dng sng s kin

Chng 4

NHNG HIN TNG BT THNG, S C V BIN PHP X L

4.1- Bo v my bin p chnh v t dng

a- H hng b cp ngun iu khin SEL-387E

1- Hin tng

- Ti t rle 1MSPRB1 (2)

+ Tt c cc Led hin th v mn hnh LCD ca khi rle tng ng tt.

- Ti my tnh iu khin v gim st

+ Trn bin bo s c UNIT NO.1 ANNUNCIATOR (1/3) n PROTECTION RELAY POWER SUPPLY FAULT sng.

+ Bo dng lnh 1MSPROB1(2) DC POWER FAILURE ti my tnh iu khin v st trn trang Event List Dislay.

- Bo ci.

2- Nguyn nhn

Do chm chp phn dy dn u ni vi u vo ca cc module ngun hoc h hng cc thit b bn trong cc b cp ngun ca SEL-387 thuc h thng I (II) gy chm chp lm in p mt chiu cp ngun iu khin cho rle gim thp.

3- Bin php x l

- Ct p t mt SSM1 cp ngun cho khi rle SEL-387 ti t rle 1MSPRB1. - Gii tr tn hiu bo ng bng nt BZ STOP, gii tr nhp nhy n bng nt ACK trn my tnh iu khin gim st. Gii tr n bo hiu bng nt Reset trang s c- Bo co lnh o cp trn c bin php x l kp thib- Bt p t mt 8D1 cp ngun cho khi SEL-387E1- Hin tng

- Ti t rle bo v 1MSPRB1 (2)

+ Tt c cc Led hin th v mn hnh LCD tt.

- Ti my tnh iu khin v gim st.

+ Trn trn trang s c Unit No.1 Annunciator (1/3) n PROTECTION RELAY POWER SUPPLY FAULT sng v nhp nhy.

+ Bo dng lnh 1MSPRB1(2) DC POWER FAILURE v 1MSPRB1 8D1 OFF OR TRIP ti my tnh iu khin v gim st trn trang Event List Dislay.

- Bo ci.

2- Nguyn nhn

- Do thao tc sai ca nhn vin vn hnh.

- Do chm chp gy qu dng in.

3- Bin php x l

- Nu do thao tc sai ca nhn vin vn hnh, ng li p t mt 8D1 trn t 1MSPRB1 cp ngun cho khi SEL-387E thuc H Thng I (II).

- Gii tr tn hiu bo ng bng nt BZ STOP, gii tr nhp nhy n bng nt ACK trn my tnh iu khin gim st. Gii tr n bo hiu bng nt Reset trang s c.

- Nu do nguyn nhn th hai bo co lnh o cp trn c bin php x l kp thi. Lc ny my bin p c bo v bi cc rle thuc H Thng II.

c- Khi rle SEL-387E pht hin li trong qu trnh t ng kim tra

1- Hin tng

- Ti t rle bo v 1MSPRB1(2)

+ Led EN trn SEL-387E sng mu .

+ Trn mn hnh LCD hin th cc m li (lin h phn hng dn vn hnh xem cc li).

- Ti my tnh iu khin gim st

+ Trn bin bo s c UNIT No.1 ANNUNCIATOR (1/3) n PROTECTION RELAY FAULT sng v nhp nhy.

+ Bo dng lnh MTR PROTECTION RELAY (387E) ALARM ti my tnh iu khin v gim st trn trang Event List Dislay.

- Bo ci.

2- Nguyn nhn

- Do mt tn hiu u vo in p.

- Do li knh Analog.

- Do pht sinh nhit bn trong bo v vt qu gi tr cho php.

- Do li RAM.

- Li b bin i A/D.

3- Bin php x l

- Nu cc li trn c t ng gii tr, bo v vn lm vic bnh thng.


- Nu qu trnh t ng gii tr khng thnh cng, bo v t ng b c lp. Xc nh nguyn nhn bo co cp trn c bin php x l kp thi.

d-S c n chiu sng bn trong t rle 1MSPRB1(2).

1- Hin tng

- n khng sng khi m ca t 1MSPRB1(2).

2- Nguyn nhn

- Do bt p t mt 8A ti t 1MSPRB2.

- Do chy n chiu sng bn trong t.

- Do tip im trn ca t khng ng khi m ca t.

3- Bin php x l

- Nu do nguyn nhn 1 ng li p t mt 8A ti t 1MSPRB2.

- Nu do nguyn nhn 2 tin hnh thay n.

- Nu do nguyn nhn 3 kim tra tip im ca, nu khng khc phc c bo co cp trn x l.

4.2- Bo v kt gin thanh ci

a- H hng b cp ngun iu khin SEL-421 ca bo v kt gin thanh ci thanh ci

1- Hin tng

- Ti t rle bo v CFPRB+ Led ENABLED v mn hnh LCD tt.


+ Trn bin bo s c SWITCHYARD ANNUNCIATOR (3/3) n PROTECTION RELAY POWER SUPPLY FAULT sng.

+ Bo dng lnh CFPRB DC POWER FAILURE trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn

- Do chm chp phn dy dn u ni vi u vo ca cc module ngun hoc h hng cc thit b bn trong cc b cp ngun ca SEL-421 gy chm chp lm in p mt chiu cp ngun iu khin cho rle gim thp.

- Do h hng cc thit b bn trong ca b cp ngun.

3- Bin php x l

- Ct ngun iu khin bng cch:

+ Ct p t mt SS11 cp ngun cho khi rle SEL-421 s 1 nu s c lin quan n khi rle ny.

+ Ct p t mt SS21 cp ngun cho khi rle SEL-421 s 2 nu s c lin quan n khi rle ny.


- Xc nh nguyn nhn bo co cp trn c bin php x l kp thi.b- Bt p t mt 8D1/8D2 cp ngun cho khi SEL-421 ca bo v kt gin

1- Hin tng

- Ti t rle bo v CFPRB+ Cc Led hin th v mn hnh LCD trn SEL-421 tt.



+ Bo dng lnh CFPRB DC POWER FAILURE v CFPRB 8D1/8D2 OFF OR TRIP trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn

- Do chm chp phn dy dn u ni vi u vo ca cc module ngun hoc h hng cc thit b bn trong cc b cp ngun ca SEL-421 gy chm chp lm in p mt chiu cp ngun iu khin cho rle gim thp.


3- Bin php x l

- Nu do thao tc sai ca nhn vin vn hnh, ng li p t mt 8D1/8D2 ti t CFPRB.


- Nu do nguyn nhn th hai bo co lnh o cp trn c bin php x l kp thi.

c- Khi SEL-421 ca bo v kt gin thanh ci pht hin li trong qu trnh t ng kim tra

1- Hin tng

- Ti t rle bo v

+ Led ENABLED chuyn sang mu .

+ Trn mn hnh LCD hin th cc m li (lin h phn hng dn vn hnh xem cc li) hoc tt.


+ Trn bin bo s c SWITCHYARD ANNUNCIATOR (3/3) n PROTECTION RELAY FAULT sng v nhp nhy.

+ Bo dng lnh COUPLING FEEDER PROT. RELAY (1) ALARM hoc COUPLING FEEDER PROT. RELAY (2) ALARM trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn


- Do li knh Analog.


- Do li RAM.

- Li b bin i A/D.

- in p u ra ca b ngun cung cp vt ngng cnh bo.

3- Bin php x l




d- S c n chiu sng bn trong t rle CFPRB.

1- Hin tng

- n khng sng khi m ca t CFPRB.

2- Nguyn nhn

- Do bt p t mt 8A ti t LFPRB1.



3- Bin php x l

- Nu do nguyn nhn th nht ng li p t mt 8A ti t LFPRB1.

- Nu do nguyn nhn th hai tin hnh thay n.

- Nu do nguyn nhn th ba kim tra tip im ca, nu khng khc phc c bo co cp trn x l.

4.3- Bo v ng dy

a- H hng b cp ngun iu khin SEL-311L thuc H Thng I , SEL-421 thuc H Thng II ca bo v ng dy

1- Hin tng

- Ti t rle bo v LFPRB1+ Led EN (ENABLED) v mn hnh LCD tt.



+ Bo dng lnh LFPRB1 DC POWER FAILURE trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn

- Do chm chp phn dy dn u ni vi u vo ca cc module ngun hoc h hng cc thit b bn trong cc b cp ngun ca SEL-311L hoc SEL-421 gy chm chp lm in p mt chiu cp ngun iu khin cho rle gim thp.


3- Bin php x l

- Ct ngun iu khin bng cch:

+ Ct p t mt SS11 ti t LFPRB1 cp ngun cho khi rle SEL-311L nu s c lin quan n khi rle ny.

+ Ct p t mt SS21 cp ngun cho khi rle SEL-421 ti t LFPRB1 cp ngun cho rle SEL-421 nu s c lin quan n khi rle ny.


- Xc nh nguyn nhn bo co cp trn c bin php x l kp thi.b- Bt p t mt 8D1 hoc 8D2 cp ngun cho khi SEL-311L hoc SEL-421 ca bo v ng dy

1- Hin tng

- Ti t rle bo v LFPRB1+ Cc Led hin th v mn hnh LCD trn SEL-311L hoc SEL-421 tt.



+ Bo dng lnh LFPRB1 DC POWER FAILURE v LFPRB1 8D1/8D2 OFF OR TRIP trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn

- Do chm chp phn dy dn u ni vi u vo ca cc module ngun hoc h hng cc thit b bn trong cc b cp ngun ca SEL-421 gy chm chp lm in p mt chiu cp ngun iu khin cho rle gim thp.- Do h hng cc thit b bn trong ca b cp ngun.

3- Bin php x l

- Nu do thao tc sai ca nhn vin vn hnh, ng li p t mt 8D1 /8D2 ti t LFPRB1. - Gii tr tn hiu bo ng bng nt BZ STOP, gii tr nhp nhy n bng nt ACK trn my tnh iu khin gim st. Gii tr n bo hiu bng nt Reset trang s c.

- Nu do nguyn nhn th hai bo co lnh o cp trn c bin php x l kp thi.

c- Khi SEL-311L hoc SEL-421 ca bo v ng dy pht hin li trong qu trnh t ng kim tra

1- Hin tng

- Ti t rle bo v

+ Led EN (ENABLED) chuyn sang mu .

+ Trn mn hnh LCD hin th cc m li (lin h phn hng dn vn hnh xem cc li) hoc tt.


+ Trn bin bo s c SWITCHYARD ANNUNCIATOR (1/3) n PROTECTION RELAY FAULT sng v nhp nhy.

+ Bo dng lnh LINE FEEDER No.1 PROTECTION RELAY (1) ALARM hoc LINE FEEDER No.2 PROTECTION RELAY (2) ALARM trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn


- Do li knh Analog.


- Do li RAM.

- Li b bin i A/D.

- in p u ra ca b ngun cung cp vt ngng cnh bo.

3- Bin php x l




d- Cc hin tng bt thng khc ti t LFPRB1

1- Hin tng

- Led 87CH FAIL trn khi rle SEL-311L thuc H Thng I ca bo v ng dy sng.

- Led COMM SCHEME ENABLED trn khi rle SEL-421 thuc H Thng II ca bo v ng dy khng sng.

2- Nguyn nhn

- Hin tng th nht nguyn nhn do h hng knh truyn tn hiu ca bo v so lch ng dy.

- Hin tng th hai nguyn nhn do bo v theo tn hiu thng tin b c lp.

3- Bin php x l

- Nu do nguyn nhn th nht, kim tra li cc u cp kt ni nu khng khc phc c bo co cp trn c bin php x l kp thi.

- Nu do nguyn nhn th hai, nhn nt nhn COMM SCHEME ENABLED trn SEL-421 a bo v theo tn hiu thng tin vo lm vic.

e- S c n chiu sng bn trong t rle LFPRB1.

1- Hin tng

- n khng sng khi m ca t LFPRB1.

2- Nguyn nhn

- Do bt p t mt 8A ti t LFPRB1.



3- Bin php x l

- Nu do nguyn nhn th nht ng li p t mt 8A ti t LFPRB1.

- Nu do nguyn nhn th hai tin hnh thay n.

- Nu do nguyn nhn th ba kim tra tip im ca, nu khng khc phc c bo co cp trn x l.

f- Khi rle ng lp li SEL-279H-2 pht hin li trong qu trnh t ng kim tra

1- Hin tng

- Ti t rle bo v LFPRB1

+ Led BK1 hoc BK2 tt.


+ Bo dng lnh LINE FEEDER No.1 RECLOSING RELAY ALARM ti my tnh iu khin v gim st trn trang Event List Dislay.

+ Bo ci.

2- Nguyn nhn


- Do li knh Analog.


- Do li RAM

- Li b bin i A/D.

3- Bin php x l

- Nu cc li trn c t ng gii tr, SEL-279H vn lm vic bnh thng.

- Gii tr tn hiu bo ng bng nt BZ STOP, gii tr nhp nhy n bng nt ACK trn my tnh iu khin gim

chuyen de role tram 6-2008.doc

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