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The Research of Grid-connected Inverter Current Control based on SVPWM
Pages: 419-422
Year: Issue:  5
Journal: Energy Conservation Technology

Keyword:  photovoltaic grid connectedinvertercurrent controlrepetitive controlPI control;
Abstract: 为提高光伏并网发电系统的输出电能质量,在重复控制策略的基础上,提出一种基于SVPWM并网逆变器电流控制的重复PI复合控制方法.该方法通过重复控制策略来抑制由死区等因素引起的周期性扰动,PI控制策略用来提高系统的动态性能,两种控制策略互为补充以提高系统的动态和稳态性能,同时,在并网逆变器直流侧加入电压闭环以稳定直流母线电压.通过Mat-lab/Simulink仿真分析,三相并网逆变器输出电流的总谐波畸变率为1.32%.实验结果验证了该复合控制方法的有效性.
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