Causé par une rupture accidentelle de l' alimentation en Gaz d'une grosse centrale thermique à Gaz, et par l'absence de marge de génération électrique.
La politique d' abandon du nucléaire remise en question.
https://www.bloomberg.com/news/articles ... g-millionsMishap Triggers Taiwan Blackout as Power Policies Draw Scrutiny
Bloomberg News 16 août 2017
➞ Accidental supply cut shut island’s largest gas-fired plant
➞ Power utility had warned of pressures on electricity supply
A blackout caused by a blunder at Taiwan’s biggest gas-fired plant is the latest challenge to an electricity grid recently pushed to its limit and to President Tsai Ing-wen’s efforts to reshape the island’s power mix.
A combination of unusually hot weather, infrastructure damage from typhoons and Tsai’s drive to abandon nuclear power left Taiwan barely able to supply sufficient electricity to residential and business users in the past week. That balance gave way just before 5 p.m. Tuesday when the Tatan power plant, which accounts for almost 9 percent of the island’s generation capacity, stopped after workers accidentally shut off its natural gas supply.
Tsai publicly apologized for the power outage that hit more than 6 million households and disrupted some semiconductor production. Electricity was restored by 10 p.m., but not before Lee Chih-kung, Tsai’s economy minister, offered his resignation. Both the operator and supplier of the plant, Taiwan Power Co. and CPC Corp., are state-run.
“The outages hurt President Tsai’s creditability,” Jeffrey Bor, economics professor at Chinese Culture University in Taipei, said by phone. “The impact on the economy is comprehensive. It’s like sending a signal to companies to escape fast, because of the risks of electricity supply disruption.”
While Tuesday’s outage was caused by human error, the blackouts heightened scrutiny of Tsai’s policies, including a pledge to rid Taiwan of nuclear and cut its use of coal. The island, which plays a critical role in the world’s electronics supply chain, will rely instead under her plan on natural gas, renewables and distributed generation, which entails multiple, smaller power sources that decrease reliance on single plants and can offer greater grid stability.
The disruption Tuesday occurred when engineers replacing power supply equipment for a control system at Tatan’s metering station didn’t switch the system from automated to manual before starting the work, according to CPC Corp., which provides the plant natural gas. That resulted in two valves being automatically closed, one for about six minutes, shutting off gas supplies.
There had been multiple warnings about Taiwan’s electricity reliability before the blackouts. A week earlier, state-run utility Taiwan Power Co. issued a red alert as the operating reserve margin, the amount of maximum capacity available above peak demand on a particular day, fell to the second-lowest on record. Business associations including the Chinese National Federation of Industries had called for slowing the pace of closing nuclear plants.
.................
Taiwan has mothballed one of its four nuclear power stations, and three of the remaining six reactors are shut down. Wu Tsai-yi, president at Taiwan Research Institute, said the restart of two of the shut reactors has been stalled by lawmakers. Nuclear made up 12 percent of Taiwan’s power mix last year, down from 17 percent in 2013, according to its Bureau of Energy.
....................