不平衡负载下三相逆变电源控制方法的研究  

Research on Control Method for Three-phase Inverter with Unbalanced Load

作　　者：张斐[1] 许建平[1] 曹太强[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《机车电传动》2009年第1期29-32,69,共5页Electric Drive for Locomotives

基　　金：国家自然科学基金资助项目(50677056)

摘　　要：基于对称分量法和叠加原理对三相逆变电源在不平衡负载下产生三相输出电压不对称的机理进行了系统的分析,得到了输出电压正序、负序、零序分量不同的补偿特性。设计了一个简单可行的同步正序/负序参考系控制器,有效地补偿了不平衡负载引起的逆变电源输出电压畸变,保证了逆变电源在任意不平衡负载下均能维持三相平衡的输出电压。最后通过Matlab仿真结果验证了理论分析和所提出的控制方法的正确性。The mechanism of asymmetric output voltage of inverter under unbalanced loads has been analyzed based on symmetrical component decomposing and superimpose theory. It is shown that positive, negative and zero sequence components of output voltage have different influence on the performance of compensation. A simple and feasible synchronous positive/negative reference system controller is proposed which can effectively compensate voltage distortion of the inverter under unbalanced loads, thus, symmetric output voltages of three phase inverter under unbalanced load can be ensured. Matlab simulation is performed to verify the theoretical analysis results of the proposed control method.

关 键 词：三相逆变器 不平衡负载 电压对称性 MATLAB 

分 类 号：TM464[电气工程—电器]