The unprecedented power cut in a city that has so far largely avoided the outages that plague much of India was triggered following the tripping of unit 5 at TPC's Trombay station. Distribution companies failed to provide even temporary relief, as they could not import supply from outside because of "overloading of the state transmission network".
"We need to look at a long-term solution. Mumbai will always be constrained on the transmission system," said Sardana. He pointed out that not a single megawatt could be brought into Mumbai on Tuesday because of "congestion in the system". The outage also became protracted because the "cold standby (unit 6 of Trombay station) takes up to 12 hours to restore power".
Alarmed at the widespread blackout, the state government on Wednesday ordered principal secretary (energy) Ajoy Mehta to pinpoints its cause, affix responsibility, and suggest ways to prevent a repeat of the disturbance. Mehta has been given eight days to submit a report.
Meanwhile, chief minister Prithviraj Chavan wrote to Prime Minister Narendra Modi, urging intervention in the power crisis looming over several states, including Maharashtra. "As a result of...disputes, private generators have expressed inability to continue. This has led to large-scale load shedding. Due to the Ganpati festival in Maharashtra, the problem has become more acute....I earnestly request you to call a meeting of chief ministers of the concerned states so that an early solution could be found," reads the letter sent on Tuesday.
Aside from hurried introspection, the Tuesday cuts triggered a clash between utility companies.
BEST general manager Om Prakash Gupta on Wednesday announced that the undertaking's 10.5 lakh consumers in the island city will not pay the "exorbitant costs" for the standby power supplied by Tata Power's unit 6 at Trombay. An oil/gas-based unit, it has been pressed into service after the breakdown of unit 5. Gupta said unit 6 had suffered "economical shutdown" some months ago, on the orders of the power regulator MERC, since power costs were as high as Rs 12-13 per unit. He is planning to move MERC this week to demand an independent inquiry into the causes of the Tuesday blackout.
"It is Tata Power's duty to provide power. Had there been a proper transmission network and a hot standby unit, BEST consumers would not have been inconvenienced," Gupta said. He recommended the enhancement of transmission lines by 1,000 MW capacity to enable the import of power during crises.
Sardana said Mumbai's "islanding" system, which insulates it from disruptions outside, was not fully fool-proof. "While the peak demand has grown to 3,300MW, power generation remains at 2,500. The solution is to increase generation." He said unit 6's conversion from oil/gas to low sulphur, low ash imported coal would bolster generation and keep tariffs low. "If we do not strengthen power generation in Mumbai, we will continue to witness problems," he forewarned.
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