Action taken to control High Voltage

• Closing of Bus and Line Reactors

• Changing of Transformation Tap Position

• Export to WR/ER Region

• Optimisation of HVDC Set Points

• Var absorption by Generators

• Switching – off of Capacitors

ISSUES OF CONCERN

STILL HIGH VOLTAGES IN SOME

AREAS

HIGH VOLTAGE PROBLEMWESTERN PART OF KARNATAKA

1. ONE CKT OF 400KV TALAGUPPA-NELAMANGALA LINE

OPENED OUT ON REGULAR BASIS TO CONTAIN OVER

VOLTAGE.

2. 400/220 KV TALAGUPPA ICT TAP POSITION AT 9 RESULTING IN

• 400KV BUS VOLTAGE @ TALAGUPPA IS AT 431KV WHILE

220KV BUS VOLTAGE @ SHARAVATHY IS AT 219KV

3. OPENING OF ONE CKT OF 400KV TALAGUPPA-NELAMANGALA

DROPS THE 400KV VOLTAGE BY 7 – 9 KV.

4. CHANGING THE TAP TO 11 WOULD BRING DOWN 400KV

VOLTAGE BY 4 – 6 KV & CORRESPONDINGLY 220KV VOLTAGE

WOULD ALSO RISE.

Map KarGRAPH kAIGA