China's Highest Voltage Energy Storage Station Operational

China Electric Power Construction Corporation (CEPC) has announced the commissioning of the Baotou Weijun 500 kV energy storage station in Baotou, Inner Mongolia. This facility represents the highest voltage level and the largest individual storage scale for such a project in China and is now connected to the power grid.

The Baotou Weijun 500 kV station serves as a crucial hub for a 1.5 million kilowatt / 9 million kilowatt-hour independent energy storage demonstration project. Its primary function is to collect and step up electricity from five 220 kV energy storage power plants before transmitting it to the 500 kV main grid of the Monxi power network.

Leveraging its ultra-high voltage collection capabilities, the station enables centralized aggregation and unified charge-discharge scheduling for distributed energy storage sites. This significantly enhances the absorption of green electricity and improves the stability of power supply. Once fully operational, the station can discharge a maximum of 1.5 million kilowatt-hours per hour, capable of sustained discharge for six hours.