摘要
三相三桥臂逆变器一般给三相对称负载供电,针对不对称负载和非线性负载,我们一般采用三相四桥臂逆变器.采用对称向量法,将三相输出电压和电感电流分解正序分量,负序分量和零序分量,在正序dq坐标系(零序分量在正序dq坐标系下)和负序dq坐标系进行旋转变换,采用前馈解耦对系统进行解耦,在三个dq坐标系下对正序分量,负序分量和零序分量进行独立控制.在matlab/simulink平台下进行仿真,仿真结果证明上述所提方法的正确性,并且优于传统的单同步旋转双闭环控制策略.
Three-phase three-leg inverters generally supplies power to the three-phase symmetric loads. For asymmetric and nonlinear loads, we generally use three-phase four-leg inverter. A symmetric vector method adopted in this paper decomposes three-phase output voltage and inductor current into positive, negative and zero sequence component. Then it makes rotating change in the d-q coordinate system of positive and negative sequence. （The zero-sequence component is under positive sequence coordinates）. The forward-feed decouple method adopted is to decouple the control system, and independently regulates the positive, negative and zero sequence component in three d-q coordinate system. It is carried out in matlab / simulink platform simulation and the results prove the correctness of the methods mentioned above. This method is superior to the traditional single svnchronous rotation douhle-loon control strategy.
出处
《湖南工程学院学报（自然科学版）》
2014年第3期5-9,共5页
Journal of Hunan Institute of Engineering(Natural Science Edition)
关键词
逆变器
对称分量法
三相四桥
inverter
method of symmetrical components
three-phase three-leg
