analisis kestabilan transien di pt. pusri akibat...
TRANSCRIPT
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ANALISIS KESTABILAN TRANSIEN di PT. PUSRI AKIBAT PENAMBAHAN PEMBANGKIT 35 MW DAN PABRIK P2-B MENGGUNAKAN SISTEM
SYNCHRONIZING BUS 33 KV
Nama : Waskito Aji NRP : 2210100151
Pembimbing 1 Dr. Ir. Margo Pujiantara, MT.
Pembimbing 2 Dr. Eng. Ardyono Priyadi ST,. M.Eng.
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya
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FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya
Adanya Penambahan Pabrik Baru dan Pembangkit STG 35 MW
Adanya Perubahan Konfigurasi
Sistem Kelistrikan PT. PUSRI Belum ada Analisis Kestabilan
Transien
1
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Mendapatkan rekomendasi agar dapat menjaga kestabilan transien
Merancang suatu skema Load shedding
yang handal agar sistem dapat kembali stabil saat terjadi gangguan seperti generator outage, motor starting, inrush trafo dan hubung singkat
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 2
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Perubahan konfigurasi kelistrikan pada PT PUSRI Palembang akibat pengembangan sistem (penambahan pembangkit dan beban)
Menganalisa respon frekuensi, tegangan, serta sudut rotor di PT. PUSRI Palembang saat dilakukan analisis kestabilan transien.
Merancang mekanisme Load Shedding (pelepasan beban) dan generator Shedding yang handal pada PT. PUSRI Palembang.
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 3
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G G G G2006 -J 3006-J 4006-J 5006-J
P- 2 Load P-3 Load P-4 Load P- 1B Load
SG- 41 SG -51SG-31SG - 21
SYN BUS OLD
0.8 Ohm
0.8 Ohm
0.5 Ohm
0.8 Ohm
13.8 kV
G
G
G G GSTG-1
2006 -J 3006-J 4006-J 5006-J
Outgoing for Load P-2 B
Outgoing for Load P- 4
P- 2 Load P- 3 Load P-4 Load P-1BLoad
STG_1
SG-61
BUS_T - STG 1
T- STG140 MVA
-
SG-41 SG -51SG-31SG-21
T- SYNBUS-OLD- NEW40MVA
SYN BUS OLD
0.8 Ohm
0.8 Ohm
0.5 Ohm
0.8 Ohm
33 kV 13.8 kV
35 MW
SYN BUS NEW
SISTEM KELISTRIKAN EKSISTING
SISTEM KELISTRIKAN BARU
7.75 MW 7.55 MW 7.65 MW 11.75 MW
7.75 MW 7.55 MW 7.65 MW 11.75 MW
7 MW
14,76 MW
18350 kW 18350 kW 18350 kW 21803 kW
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 4
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Klasifikasi Kestabilan berdasarkan Paper IEEE definition and classification of power system stability
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 5
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Kestabilan
Penambahan Beban
Motor Starting
Pelepasan Beban
Hubung Singkat
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Kampus ITS Gedung B & C Sukolilo Surabaya 6
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59.5 Hz (99.16%)
60.5 Hz (100.83%)
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Kampus ITS Gedung B & C Sukolilo Surabaya 7
61.8 Hz (103%)
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110 %
90 %
SwellOvervoltage
Sag
Undervoltage
Momentary Temporary Interruption10 %
0. 5 cycle 3 s 1 minTime
Instantaneus
Mag
nitu
de
80 %
120 %
140 %
30 cycle
Normal Operasi
Berdasarkan IEEE 1159-1995 Berdasarkan PLN
- 500 kV + 5%. -5% - 150 kV + 5%, -10% - 70 kV + 5%, -10% - 20 kV + 5%, -10%
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 8
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Pelepasan Beban Secara Manual Pelepasan Beban Otomatis
Frekuensi Status
Menurut standar ANSI/IEEE C37.106-1987
Step Frequency Trip Point (Hz)
% Percent of Load
Shedding (%)
Fixed Time Delay
(Cycles) on Relay
Sistem 60 (Hz) Sistem 50 (Hz)
1 59.3 49.41 98.83 10 6
2 58.9 49.08 98.16 15 6
3 58.5 48.75 97.5 As required to arrest
decline before 58.2(97%) Hz
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
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No Kasus Deskripsi
1 Generator Outage mendiskripsikan efek dari generator outage dan
mekanisme load shedding
2 Transformator
Inrush mendiskripsikan efek dari arus inrush
transformator 3 Short circuit mendiskripsikan efek dari short circuit 3 fasa 4 Motor Starting mendiskripsikan efek dari starting motor
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 10
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No ID Daya Mampu
(MW) Normal Operasi
(MW) Case Generator Outage
1 2 4 12 14 23 24 1 5006-J 15 11.8 0 15 15 0 0 15 15 2 2006-J 12 7.8 12 0 12 0 12 0 0 3 3006-J 12 7.6 12 12 12 12 12 0 12 4 4006-J 12 7.7 12 12 12 12 12 12 12 5 STG-1 35 21.8 24 24 0 24 0 24 0
Total 86 57 60 63 51 48 36 51 39
No ID kV Lokasi Setting Rele (s) 1 TO DIST PANEL NPK PLANT 0.4 Pabrik 1 0.3 2 MCC#38 2.4 Pabrik 3 0.3 3 SG-61 13.8 Pabrik Baru 0.3
ID kV Kapasitas
(kW) Tempat Konfigurasi
Mtr-SG-61 13.8 2500 Pabrik baru (P2-B) 2006-J, 3006-J, 4006-J, dan 5006-J on sedangkan
STG-1 off
101-J1 13.8 2200 Pabrik 3 2006-J, 4006-J, 5006-J dan STG-1 on sedangkan
3006-J off
Generator Outage
Short Circuit
Motor Starting
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 11
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-9°
97,89 %
84,79%
87,02 %
-3,02°
NOT SAFE
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Load Shedding : Pelepasan Beban 5,6 MW terletak
pada Pabrik Baru Waktu Clearance (0,3 S)
97,89%
99,26%
99,17%
87,02%
90,85%
SAFE FAKULTAS TEKNOLOGI INDUSTRI
JURUSAN TEKNIK ELEKRO Kampus ITS Gedung B & C Sukolilo Surabaya
13
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Load Shedding Tahap 1: Pelepasan Beban 10 % ( 5,6 MW)
terletak pada Pabrik Baru Frekuensi 98,83 % (49,41 Hz) Waktu Clearance (4,741 S + 0.12 S)
97,89%
99,26%
98,82% 87,02%
90,85% SAFE
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 14
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-0,43°
0,97°
-1,54°
56,319%
84,44% 80.47%
NOT SAFE
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Kampus ITS Gedung B & C Sukolilo Surabaya 15
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Load Shedding Tahap 1: Pelepasan Beban 21,45 MW Waktu Clearance 0,3s
56,319%
99,323%
84,44%
90,11% SAFE
98,881%
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 16
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Load Shedding Tahap 1: Pelepasan Beban 10 % ( 5,6 MW) Frekuensi 98,83 % (49,41 Hz) Waktu Clearance (3,321 S + 0.12 S) Load Shedding Tahap 2 : Pelepasan Beban 15% ( 8,45 MW) Frekuensi 98,16 % (49,08 Hz) Waktu Clearance ( 3,962S + 0.12 S)
Load Shedding Tahap 3 : Pelepasan Beban 7,4 MW Frekuensi 97,5 % (48,75 Hz) Waktu Clearance (5,683 S + 0.12 S)
56,319%
84,44%
65,319%
88,65%
99,323%
90,015%
88,99%
90,11%
SAFE
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 17
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-6,94° -6,71°
-6,11°
99,94%
100%
100,127%
68,92%
SAFE
FAKULTAS TEKNOLOGI INDUSTRI JURUSAN TEKNIK ELEKRO
Kampus ITS Gedung B & C Sukolilo Surabaya 18
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122%
105%
100.53%
128,85% 100,34%
NOT SAFE
177 °
-177 °
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99,5%
95,96% 99,67%
102,67%
Generator Shedding Tahap 1: Setting 81-O 101% (50,5 Hz) Waktu Clearance (2,061s + 0,12s)
SAFE
7,79 °
-6,19 °
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99,89%
97,3
95,73%
99,88%
95,96%
-1,44° -1,86° SAFE
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No ID Daya
Mampu (MW)
Normal Operasi (MW)
Case Generator Outage
1 2 4 12 14 23 24
1 5006-J 15 11.8 0 15 15 0 0 15 15 2 2006-J 12 7.8 12 0 12 0 12 0 0 3 3006-J 12 7.6 12 12 12 12 12 0 12 4 4006-J 12 7.7 12 12 12 12 12 12 12 5 STG-1 35 21.8 24 24 0 24 0 24 0
Total 86 57 60 63 51 48 36 51 39
LOAD Normal Operasi (MW)
Load Shedding (MW) - - S F S F S F S F S F
1 PUSRI 1 11,75 11,75 11,75 11,75 11,75 7.45 10,35 8,15 8,15 11,75 11,75 9.55 9,55
2 PUSRI 2 7,75 7,75 7,75 7,75 7,75 3.75 7,75 5,65 5,65 7,75 7,75 6.75 6,75
3 PUSRI 3 7,55 7,55 7,55 7,55 7,55 7.55 6,05 3,2 3,2 5,05 7,55 3.2 3,2
4 PUSRI 4 7,65 7,65 7,65 7,65 7,65 7.65 7,65 3,05 3,05 5,55 7,65 4.15 3,05
5 PUSRI BARU 21,76 21,76 21,76 16,16 16,16 21.8 16,16 14,96 14,96 21,76 16,16 15 14,96
Total beban 56.46 56,46 56,46 50,86 50,86 48.2 47,96 35,01 35,01 51,86 50,86 38.6 37,51 Load Shedding - - 5,6 5,6 8,3 8,5 21,45 21,45 4,6 5,6 17.9 18,95
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Case Bus Frekuensi Status Tegangan Status Min Stedy Min Stedy 5006-J Off MCC#58 99,2% 99,41% v 92,16 % 93,29% v 2006-J Off MCC#28 99,51% 99,67% v 93,41% 94,32% v STG-1 Off STG_1 Tidak Stabil Tidak Stabil x 84,79% 87,02% x STG-1 Off + LSS STG_1 99,17% 99,26% v 90,45% 90,85% v STG-1 Off + LSF STG_1 98,82% 99,26% v 90,32% 90,85% v 5006-J & 2006-J Off MCC#58 94,04% 94,04% x 89,55% 91,56% v 5006-J & 2006-J Off + LSS MCC#58 98,27% 99,17% v 93,55% 93,83% v 5006-J & 2006-J Off + LSF MCC#58 98,6% 99,27% v 89,5% 92,09% v 5006-J & STG-1 Off STG_1 Tidak Stabil Tidak Stabil x 80,46% 84,44% x 5006-J & STG-1 Off + LSS STG_1 98,99% 99,32% v 80,46% 90,11% v 5006-J & STG-1 Off + LSF STG_1 97,47% 99,32% v 89,27% 90,11% v 2006-J & 3006-J Off U-NB-203A-PIII 97,1% 97,1% x 90,44% 91,48% v
2006-J & 3006-J Off + LSS U-NB-203A-PIII 98,83% 99,23% v 90,44% 93,16% v
2006-J & 3006-J Off + LSF U-NB-203A-PIII 98,75% 99,44% v 90,44% 91,84% v 2006-J & STG-1 Off STG_1 Tidak Stabil Tidak Stabil x 81,4% 85,18% x 2006-J & STG-1 Off + LSS STG_1 99,17% 99,42% v 89,05% 90,49% v 2006-J & STG-1 Off + LSF STG_1 98,07% 99,49% v 89,08% 90,52% v Inrush Trafo SYN bus old 100,12% 100% v 68,92% 99,94% v TO DIST PANEL NPK PLANT SWGR "51A" 100,12% 100,01% v 83,72% 99,98% v MCC#38 SG-31 100,31% 100,1% v 66,03% 100,06% v SG-61 STG_1 122% 100% x 128,85% 100% v SG-61+GS STG_1 102,67% 99,67% v 99,5% 95,96% v Mtr-SG-61 SG-61 99,88% 99,89% v 95,73% 95,95% v 101-J1 2200 99,89% 99,93% v 97,3% 97,44 v
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Kesimpulan • Untuk lepasnya 1 pembangkit terjadi penurunan tegangan dan frekuensi paling besar ketika
pembangkit STG lepas. Sedangkan untuk lepasnya 2 pembangkit terjadi penurunan tegangan dan frekuensi paling besar ketika lepasnya generator STG dan 5006-J. Sehingga membutuhkan load shedding
• Load shedding meggunakan status lebih sedikit beban yang di shedding jika dibandingkan dengan load shedding menggunakan frekuensi.
• Load shedding status digunakan sebagai load shedding utama • Dari 3 kasus hubung singkat didapatkan bahwa kasus short circuit di bus SG-61 belum
memenuhi standar sudut rotor dan terjadi over frekuensi. • Pada kasus motor starting dan inrush trafo tidak perlu ada skema load shedding terlebih
dahulu. Saran • Pemasangan rele 81-O pada bus STG-1 • Pemesangan load shedding status dan frekuensi sesuai dengan hasil studi.
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