ANNUAL REPORT 2011-12 - State Load Despatch Centre (SLDC)

Annual Report 2011-12
G. Contingency of 400 KV S/C Sugen – Vapi Line Tripping
The 400 KV S/C Sugen – Vapi line is carrying power flow of around 500-600 MW.
Tripping of the said line may cause severe stress on EHV network of South Gujarat
area. The PNA study case results are shown below for reference:
Elements
Normal Loading
in MW
In case of
tripping
400 KV Sugen - Vapi Line 374 0
400 KV Sugen - Pirana 1 119 171
400 KV Sugen - Pirana 2 119 171
400 KV Sugen - Jhanor 155 298
220 KV Kim - Sugen 1 50 -10
220 KV Kim – Sugen 2 61 -10
220 KV Utran - Vav 129 190
220 KV Chikhli - Vapi 244 393
220 KV Vapi - Vapi (PG) 140 347
220 KV KAPP - Vapi 1 112 175
220 KV KAPP - Vapi 2 112 175
220 KV Kim - Vav 100 198
220 KV Vav - Navsari 96 123
220 KV Kawas - Vav 133 143
220 KV Vav - Ichhapore 164 170
220 KV Kawas - Navsari 1 161 188
220 KV Kawas - Navsari 2 161 188
220 KV Navsari - Bhilad 116 220
H. Contingency of 400 KV S/C Hadala – Jetpur Line Tripping:
At 400 KV Hadala S/S, the power injection from APL is around 800 MW and around
300 MW from Essar-Vadinar. The 400 KV S/C Hadala - Jetpur line is carrying power
flow of around 500 MW. Tripping of the said line may cause extreme overloading on
220 KV D/C Hadala – Nyara line, ICTs at Gondal and Nyara which may endanger the
whole Saurashtra network.
State Load Despatch Centre
Gujarat Energy Transmission Corporation Limited
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