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用于并联型有源电力滤波器的谐振调节器选择性特性比较分析

DOI: 10.13334/j.0258-8013.pcsee.2014.30.008, PP. 5320-5328

Keywords: 有源电力滤波器,谐振调节器,选择性特性,稳定性

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Abstract:

为减小运算量,并联型有源电力滤波器的电流指令可以通过负载电流减去其中的基波成分获得。但该方法生成的指令包含各次谐波成分,为混合谐波指令。此时,为实现选择谐波补偿功能,电流环调节器需具有良好的选择性特性。该文以选择性特性为重要指标,详细比较分析比例谐振调节器和矢量谐振调节器的调节特性。文章从原理推导、电流调节性能、以及对系统稳定性的影响3个方面对两种谐振调节器进行对比研究。通过研究发现,比例谐振调节器未考虑被控对象影响,选择性特性较差,适用于电流指令已精确生成的场合;而矢量谐振调节器充分考虑了被控对象影响,具有良好的选择性特性,适合上述拥有混合谐波指令、又要求实现选择谐波补偿功能的场合。最后,通过一台10kVA实验样机对上述结论进行详细验证。

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