The Telegraph
Wednesday , August 1 , 2012
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Power situation back to normal; all three affected grids restored

New Delhi, Aug 1 (PTI): The three major electricity grids that had collapsed on Tuesday have been restored, Power Grid said on Wednesday.

The Northern, Eastern and North Eastern Grids -- which together cater to over half of the country's population of 1.2 billion -- were restored by around 0930 hrs Wednesday.

The three grids had collapsed at 1pm on Tuesday, triggering a massive power crisis that brought most parts of the country to a grinding halt.

According to the state-run Power Grid, 100 per cent supplies have been restored in all the three regions.

“System restored to normal state,” Power Grid said in a statement.

Full power supply of 30,081mw has been restored in the northern region, including Delhi.

Eastern region, which caters to 10 states and has the largest infrastructure in the country with at least 25,000mw generation capacity, was the last one to be restored.

”In the Eastern region, 100 per cent or 11,052mw supply has been fully restored,” it said.

Till late Tuesday evening, only half the eastern region had enough electricity supplies.

The North East was the first one to be fully restored, last evening.

Even though the exact reason is yet to be ascertained, officials said that problems started in the Eastern Grid and there could also have been overdrawals by some states.

The power failure happened at 1pm on Tuesday, less than 24 hours after the supply from the Northern Grid was restored following an outage on early Monday morning that affected over 300 million.

For the first time, the three inter-state transmission networks tripped together. While no official reason was given for the failure, sources said the trouble started in the Eastern Grid.

Wednesday’s failure hit the Talcher-Kolar HVDC (High Voltage Direct Current) transmission line, considered Asia's longest, running from Odisha to Karnataka.

The eastern region has the biggest power infrastructure in the country having at least 25,000mw generation capacity. Most of them are thermal plants since the area is abundant in coal resources.

Further, electricity generated from projects in this region caters to at least ten states in the country.