SriLanka, Oct. 25 -- All three generating units at the Norochcholai coal-fired power plant have been restored and are operating at full capacity, National System Operator (NSO) Chairman Dr. B. L. Pradeep Priyadarshana Perera told the Sunday Observer yesterday.

"The power supply is stable," he said. Dr. Perera said a thorough investigation was under way to uncover how the power plant's shutdown had triggered the collapse of the national grid resulting in an island wide blackout on October 17. "We are carrying out a thorough investigation to determine how the shutdown occurred," he said.

Dr. Perera said routine maintenance was being carried out on Norochcholai's Unit 1 when the unit tripped, responding to questions about whether the work ...