Source: Xinhua Daily
According to State Grid, due to the ongoing high temperatures, as of July 7, Jiangsu’s power grid load has broken historical records for the third time this year, reaching 152 million kilowatts. On July 6, under the unified command of the Power Dispatch and Control Center of State Grid Jiangsu Electric Power Co., Ltd., a total of 93 new-type energy storage stations across the province discharged electricity to the grid during the evening peak, with a maximum discharge power of 7.14 million kilowatts, achieving the largest centralized dispatch of new-type energy storage in China.
New-type energy storage is known as a “super power bank,” capable of discharging power during peak demand periods for peak regulation, and charging during off-peak periods to aid the consumption of new energy.
On the evening of the 6th, to support the evening peak of grid electricity usage, a total of 64 grid-side and 29 power-side energy storage stations participated in the centralized discharge. The total participating capacity reached 7.248 million kilowatts, and the actual maximum dispatch scale was 7.14 million kilowatts. This set a new record in centralized dispatch scale, marking a 56.9% year-on-year increase compared to the centralized dispatch of 4.55 million kilowatts of new-type energy storage last summer.
In this centralized dispatch of new-type energy storage, State Grid Jiangsu Electric Power issued discharge instructions to more than 7 million kilowatts of new-type energy storage through its next-generation dispatch support system during peak demand, with a maximum capacity sufficient to meet the one-hour electricity needs of approximately 48 million households.
While it may appear simple, the timing of charging and discharging must be carefully chosen. Discharging, while considering urban electricity demand, must also strive to enable energy storage projects to generate revenue. “Spatially, most of Jiangsu’s energy storage projects are located in northern Jiangsu, while electricity demand is concentrated in southern Jiangsu. The electricity peak in southern Jiangsu occurs during the day, while in northern Jiangsu it occurs at night. Therefore, energy storage can act as a ‘spatiotemporal regulator,’” explained Qiu Chenguang, Director of Dispatch Operation at the Dispatch and Control Center of State Grid Jiangsu Electric Power. Jiangsu’s current installed capacity of new-type energy storage is 7.616 million kilowatts, ranking fourth nationwide, and includes various forms such as electrochemical energy storage and salt cavern compressed air energy storage. (Ni Min)