China's largest semi-solid-state lithium battery energy storage project has been successfully connected to the grid.

"The No. 1 and No. 2 main transformers of the Dongxing Energy Storage Power Station have completed five charging cycles and are operating normally!" At 21:59 on November 30th, at the site of the China Green Development Group's 200MW/800MW energy storage power station project in Wuhai, with a clear response, my country's largest semi-solid-state lithium battery grid-side independent new energy storage project was successfully connected to the grid.

The Wuhai Energy Storage Power Station is the first large-scale energy storage project in Inner Mongolia Autonomous Region to adopt semi-solid-state lithium iron phosphate battery technology. Covering an area of ​​approximately 100 acres, it features 160 energy storage battery compartments and 40 integrated converter and booster compartments, essentially providing the Wuhai power grid with a "super power bank." It can store excess energy when the grid load is low and supply power to the grid during peak demand periods, playing a crucial role in new energy consumption, power supply security, and emergency dispatch. It is expected to deliver 189 million kilowatt-hours of clean electricity to the grid annually.

“This ‘power bank’ has a considerable capacity,” said Qin Lei, project manager of the Wuhai energy storage project, providing a set of intuitive data: the power station can discharge equivalently 282 times per year, with a maximum single discharge of 800,000 kilowatt-hours. Based on typical household electricity consumption standards, each maximum discharge can simultaneously meet the electricity needs of approximately 4,000 households for one month. “Next, we will focus on equipment commissioning and three full-charge-discharge tests, conducting comprehensive checks and optimizations to ensure the equipment performs at its optimal state,” Qin Lei explained.

“High safety, long endurance, and high energy density are the project’s three core advantages,” said a representative from China Green Development Group. “The project achieves flexible scheduling of ‘daytime energy storage and nighttime peak shaving,’ which not only significantly improves the stability of the power system but also ensures that local green electricity can be generated, transmitted stably, and used effectively.”

As a crucial hub in the Inner Mongolia West Power Grid, the operational stability of the Wuhai power grid directly impacts the power supply reliability of the surrounding power grids. The integration of energy storage power stations is like installing a "resilient buffer" on the power grid. It will play an important role in peak shaving, valley filling, fluctuation smoothing, and power supply guarantee. It will effectively solve the challenges brought about by the large-scale gathering of new energy in Wuhai and surrounding areas, significantly improve the stability of the power system and the capacity for new energy absorption, and provide key support and demonstration models for building a new type of "integrated power system of source, grid, load and storage".