A view of burnt transformers at Chagino power substation
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Change of Guilty
State Duma’s commission established to spot the reasons of Moscow blackout of May 25 has reached a striking conclusion. The accident resulted not from the failure of Chagino transformers, the deputies said. Also on Wednesday, another commission, the one set up by RAO UES CEO Anatoly Chubais, reported its own preliminary conclusions and asked for more time.
State Duma’s commission headed by the vice speaker Vladimir Pekhtin arrived in the Central Dispatching Department of the Unified Energy System (Russian acronym is TsDU) yesterday, June 15. The purpose was to determine what had actually happened in online control of the system and whether cascade fault could have been prevented.
After two-hour discussion, Pekhtin announced it was not Chagino that had caused the blackout. The accident had resulted from the failure of six power lines running from Ochakovo substation. Dispatchers had acted up to their duties, Pekhtin concluded.
Now the deputies are to spot the reason for short circuit at six lines of Ochakovo substation. To be more exact, only five lines had failed, while the sixth one died from the overload.
The report of Chubais experts was reassuring and technically evasive. “The blackout resulted from the synergy of a number of factors, each of which, if taken separately, wouldn’t have caused the accident of such scale,” said the experts. They asked to extend the term of investigation till June 18, “as the reasons of the galloping load pickup and overload of power lines could have stemmed from the changes in the reactive power flow and additional calculations and examination are needed.”
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