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电网技术  2007 

一种实用的串并联混合有源电力滤波器

, PP. 32-36

Keywords: 混合有源电力滤波器,零磁通变流器,谐波抑制,无源电力滤波器

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Abstract:

设计了一种实用的串并联混合有源电力滤波器,分析了其结构、工作原理和滤波性能。在该滤波器中,串联在系统和谐波负载之间的零磁通变流器可自动对基波呈低阻抗、对谐波呈高阻抗,从而实时检测出剩余谐波电流流过变流器时产生的谐波电压降、实现滤波;逆变器可产生一个与检测到的谐波电压成正比的电压。通过将耦合变压器与无源电力滤波器串联后并入电网,减少了流入系统的谐波电流。实验结果验证了该滤波器设计原理的正确性,表明其能有效降低滤波器有源部分的容量,具有良好的滤波性能。

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