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并联型APF对两类非线性负载的谐波补偿特性研究

, PP. 79-85

Keywords: 有源电力滤波器,非线性负载,谐波补偿,谐波放大效应

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Abstract:

采用等效电路分析方法,研究了并联型APF对电压源型和电流源型这两类非线性负载的谐波补偿特性。研究发现这两种补偿情况下非线性负载交流侧电流均会发生不同程度的谐波放大效应,其中并联型APF补偿电压源型非线性负载时谐波放大效应较为严重,影响了谐波补偿效果。理论推导得到了统一描述谐波放大效应的表达式,表明系统的结构参数会对APF的补偿特性造成较大影响,通过适当增大负载侧的等效阻抗可以有效减小谐波放大效应,使并联型APF对两类非线性负载均取得较好的补偿效果。仿真与实验结果验证了理论分析的正确性。

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