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基于改进型比例谐振控制器的三相四线制光伏发电和有源滤波器系统

, PP. 142-148

Keywords: 四桥臂并网逆变器,比例谐振控制,谐波补偿,频率波动

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Abstract:

一种基于改进型PR控制器的PV-AF系统控制策略在静止坐标系下对基波逆变电流以及需要补偿的各次谐波电流进行无静差跟踪,将光伏系统的电能注入电网的同时改善电网电能质量。对比分析了PR控制器与改进的PR控制器特性,根据改进PR控制器各参数对性能指标的影响,对改进的PR控制器进行参数设计。仿真和实验结果表明所提的改进PR控制器可以使电流环控制器更好的跟踪指令电流,对电网频率波动具有较好的适应性,验证了所采用的控制策略的可行性和有效性。

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