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一种LCLLC滤波器及其参数设计

DOI: 10.13334/j.0258-8013.pcsee.2015.08.022, PP. 2009-2017

Keywords: LLCL滤波器,LCLLC滤波器,滤波器参数设计,高次谐波

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Abstract:

新型高阶LLCL并网逆变器输出滤波器具有一个串联谐振支路,可以旁路开关频率谐波电流,减小电网电流谐波。针对LLCL滤波器二倍及其以上倍开关频率电流谐波衰减速率低的问题,提出一种新的LCLLC型滤波器拓扑;分析所提滤波器的谐振频率特性,并提出滤波器参数的设计方法;通过仿真和实验对LCL、LLCL和LCLLC3种滤波器进行对比,证明所提滤波器不仅能够满足电网对高次谐波的要求,且具有较强的参数鲁棒性。

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