In order to solve the influence of the supercapacitor state of charge limit management on the normal operation of the battery and the fluctuation of the DC bus voltage in the hybrid energy storage system of the microgrid,a control strategy based on the battery current error is proposed.By using the difference between the battery current obtained during the supercapacitor limit management and its actual current,the supercapacitor pulse trigger controller input current signal is controlled to maintain the DC voltage stability during the supercapacitor limit management,and reduce the battery output current fluctuation.The simulation results show that the proposed control strategy can slow down the fluctuation of DC bus voltage during the limit management of supercapacitors,reduce the number of rapid fluctuations of battery output current,and reduce its workload.The research results can provide reference for the stable and economic operation of microgrid.
关键词
混合储能系统/限值管理/电池电流误差/直流母线电压/蓄电池
Key words
hybrid energy storage system/limit management/battery current error/DC bus voltage/battery
维普
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