Title: Frequency modulation control of electric energy storage system based on abundance index

Authors: Bingjie Li; Zesen Li; Guojing Liu

Addresses: Economics and Technological Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing, 210009, Jiangsu, China ' Economics and Technological Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing, 210009, Jiangsu, China ' Economics and Technological Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing, 210009, Jiangsu, China

Abstract: In order to overcome the problems of high time consumption and low accuracy of frequency regulation control in power energy storage systems, this paper proposes a frequency regulation control method for power energy storage systems based on adequacy indicators. Firstly, the control principle of energy storage charging and discharging are analysed, and a frequency characteristic model of the power energy storage system is constructed. Then, considering the adequacy index of power generation capacity, a bundle condition for capacity balance of the power energy storage system is constructed. Finally, the frequency modulation of the power energy storage system is controlled through the equivalent frequency modulation coefficient. The experimental results show that the frequency modulation control takes only 8.2 seconds, and the accuracy of frequency modulation control can reach 99.90%, indicating that the method proposed in this paper can effectively improve the effectiveness of power energy storage systems.

Keywords: electric energy storage system; frequency modulation control; abundance index; equivalent frequency modulation coefficient; capacity balancing.

DOI: 10.1504/IJETP.2024.138548

International Journal of Energy Technology and Policy, 2024 Vol.19 No.1/2, pp.216 - 229

Received: 28 Jul 2023
Accepted: 16 Jan 2024
Published online: 10 May 2024 *

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