Recently, in Hainan Prefecture, Qinghai Province, an area with an altitude of up to 3000 meters, a world-renowned energy project - Huaneng Hainan Prefecture 150 MW/600 MWh high-voltage direct mounted energy storage system, has been successfully connected to the grid and achieved full load operation. This system not only ranks first in the world with its impressive altitude, but also leads the way in scale, marking a major breakthrough and leading position for China in the field of high-voltage direct hanging energy storage technology.

This project is invested and developed by Huaneng Qinghai Branch, and developed and constructed by Huaneng Qingneng Institute. The total installed capacity is 150 MW/600 MWh. It is a shared energy storage project on the grid side of three new energy projects newly built by Huaneng Qinghai Branch.

The overall project adopts the 35 kV high-voltage direct hanging energy storage technology led by Qingneng Institute, with a single unit capacity of 25 MW/100 MWh. It can store 600000 kWh of electricity on a single charge and can independently accept grid regulation. It has the characteristics of high voltage level, large single unit capacity, few AC/DC parallel connections, and few communication levels. It does not require a power frequency transformer. On the basis of improving battery capacity utilization and reducing battery parallel safety risks, the system efficiency is improved by 4% to 6%, and it can achieve fast response within 10 milliseconds. In addition, to adapt to the special environment of Qinghai, the project has focused on correcting insulation and electrical clearances at high altitudes to ensure safe, stable, and efficient operation under high-altitude conditions. Keywords: engineering construction, engineering news, engineering construction information.

With the operation of this project, it will significantly enhance its ability to regulate the fluctuation and intermittency of output power of new energy power plants, providing comprehensive power auxiliary services including peak shaving and frequency regulation for the power grid system. These services will directly promote the optimization of the quality of power grid operation and significantly enhance the safety and stability of the power grid, providing strong guarantees for the reliability and sustainability of power supply. (This article is from the official website of Jian Dao: www.seetao.com. Reproduction without permission is prohibited, otherwise it will be prosecuted. Please indicate Jian Dao website+original link when reprinting.) Jian Dao website mechanical column editor/Zhou Yingwen