LCL滤波的三相并网逆变器电流双环控制策略

被引:6
作者
刘韬
郝翔
杨旭
黄浪
机构
[1] 西安交通大学电气工程学院
关键词
LCL滤波器; 双环控制; 输出导纳; 总谐波失真;
D O I
10.13234/j.issn.2095-2805.2012.4.7
中图分类号
TM464 [逆变器];
学科分类号
摘要
对于LCL滤波的三相并网型逆变器系统,电网电压畸变会增加网侧电流总谐波。针对该问题,分析了传统逆变侧电流单环控制策略无法有效抑制电网电压畸变对网侧电流的影响。为了增加网侧电流对电网电压畸变的抗扰性,提出了电流双环的控制策略。内环通过PI控制器实现对逆变侧电流的控制,外环通过PI+PR的控制方案完成对网侧电流的控制。通过推导系统的输出导纳的频率响应,分析了在提出方案下,网侧电流能够更有效地抑制网侧电压畸变的影响。仿真以及100kW样机的实验结果验证了该控制策略的有效性。
引用
收藏
页码:7 / 12
页数:6
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