At 7:14 on December 22, the 7512 circuit breaker of the 750 kV GIS switch station of the Laxiwa Hydropower Station was successfully closed, marking the restoration of power transmission after the earthquake on the 750 kV backbone line of the Northwest Power Grid, and the power station achieving full power transmission capacity. , played an important role in energy security for the emergency and disaster relief work in Gansu and Qinghai provinces after the 6.2-magnitude Jishishan earthquake.
At 23:59 on December 18, a magnitude 6.2 earthquake occurred in Jishishan County, Linxia, Gansu Province, causing the 750 kV 7510 and 7512 circuit breakers of the Laxiwa Hydropower Station to trip, causing a power outage on the official line, forcing the power station to enter single-line operation.
He Weibing, deputy director of the production department of Laxiwa Power Generation Branch of SPIC Upper Yellow River Hydropower Development Co., Ltd., said that after the earthquake, the company immediately launched emergency response and arranged for post-earthquake investigation, data analysis and other work.
"At 9:22 on the 22nd, the 7510 circuit breaker was closed, the line closed the loop and the operation was successful, and the whole plant returned to normal operation." He Weibing said that at 18:18 on the 21st, he received a pre-order from the network adjustment to resume power transmission. , until the 7512 circuit breaker was successfully closed, and then the 7510 circuit breaker was successfully closed, nearly 20 employees of the company stayed at their posts for more than 15 hours.
Laxiwa Hydropower Station has a total of six 700,000-kilowatt generating units installed. It is the hydropower station with the highest dam, largest installed capacity, and largest power generation capacity in the Yellow River Basin. It is an important part of China's "West-to-East Power Transmission" and a 750,000-kilowatt power generator in the Northwest Power Grid. The important supporting power supply of the volt grid.