Policy Analysis and Operational Benefit Evaluation of China's Hundred Megawatt-scale Electrochemical Energy Storage Stations in Power Auxiliary Service Market

In China, hundred megawatt-scale electrochemical energy storage power stations are mainly distributed in UHV DC near area, new energy high permeability area and load center area. It can meet needs of peak shaving, frequency regulation, system standby and other applications in the regional power grid. Compared with energy storage projects in the supply side and user side, comprehensive benefits of grid side energy storage projects are often difficult to identify and quantitatively analyze. This paper analyzes current status of hundred megawatt-scale electrochemical energy storage stations in China’s power auxiliary service market. Taking Jiangsu Province as an example, multi-value models for peak shaving, frequency modulation, system standby and new energy consumption are established. After Life cycle operational benefits evaluation, operational recommendations are proposed to recycle investment through the China’s auxiliary service market.