The virtual synchronous generator(VSG)control is proposed to obtain inertial support in the inverter control design,but it will bring the problems of power oscillation.In order to improve the power regulation and operation status of system,this paper proposes a VSG power oscillation suppression strategy based on adaptive fuzzy sliding mode compensation.Firstly,the mathematical model of VSG is constructed,and the causes of VSG oscillation are analysed.Secondly,an adaptive fuzzy sliding mode compensation is designed by Lyapunov function to make its frequency and power angle converge quickly,so as to suppress the power oscillation,and its stability is proved.Finally,the simulation and experimental results show that the proposed VSG control strategy can significantly suppress the power oscillation during start-up and power sag.The system overshoot is reduced and the response time is faster,so the system operation state is improved.
关键词
虚拟同步发电机/功率振荡/模糊滑模/李雅普诺夫函数
Key words
virtual synchronous generator/power oscillation/fuzzy sliding mode/lyapunov function
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