Robust Optimal Frequency Regulation Control Strategy for Pumped Storage in Grid-Connected Wind Power Systems

doi:10.11930/j.issn.1004-9649.202303027

Abstract

Abstract: To solve the primary frequency regulation problems of power system brought about by short-time wind power fluctuation and load fluctuation, a robust optimal frequency regulation control method is proposed for pumped storage units in the power system with integration of wind power. By establishing the overall state space equations of the power system with the pumped storage units as the primary frequency regulation power source, the general robust control problem is converted into an optimal robust control problem with the wind power output fluctuation and load fluctuation as the disturbance variables in the form of weight functions. The mutation harris hawks optimization grey wolf optimizer (MHHOGWO) is applied to select the optimal parameters of the weighting matrix reflecting the fluctuation characteristics of wind power output and load, and to solve the robust controller with the lowest frequency deviation of the system. The simulation results show that the proposed method can effectively reduce the frequency deviation of the whole power system caused by external disturbances, and the regulation response performance of pumped storage units to short-time external power fluctuations is also improved.

Key words: power systems, pumped storage, robust control, hybrid vulture-grey-wolf algorithm

YOU Wenxia, LIU Bin, LI Shichun, LI Wenwu, ZHA Zijian, ZHANG Pengyu. Robust Optimal Frequency Regulation Control Strategy for Pumped Storage in Grid-Connected Wind Power Systems[J]. Electric Power, 2023, 56(5): 32-40.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202303027

https://www.electricpower.com.cn/EN/Y2023/V56/I5/32

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