不平衡负载情况下基于双序dq坐标系双级矩阵变换器的闭环控制研究  

Study of Closed loop Control based on Double Synchronous Rotating Frame for Two-stage Matrix Converter Under Unbalanced Load

作　　者：邓文浪[1] 杨欣荣[2] 朱建林[1] 

机构地区：[1]湘潭大学信息工程学院,湖南省湘潭市411105 [2]中南大学信息科学与工程学院,湖南省长沙市410083

出　　处：《中国电机工程学报》2006年第19期70-75,共6页Proceedings of the CSEE

摘　　要：不平衡负载会引起双级矩阵变换器(TSMC)输出电压的不对称,三相不对称电压可按照对称分量法分解为3个平衡分量:正序、负序和零序分量,该文基于对各分量分别在正序、负序同步旋转坐标系(dq坐标系)下表达式的推导,分析了基于单向dq坐标系PI闭环控制存在的问题,提出了基于双序dq坐标系的闭环控制方法:采用正序和反序两组PI控制器分别对输出电压的正序分量和负序分量进行闭环反馈控制,所提方法可以控制正序分量跟随正序参考给定且稳态无静差,同时可以对负序分量进行完全控制,能有效快速抑制负载的不平衡扰动,保证了TSMC高性能的输出电压。仿真结果验证了所提方法的合理性和有效性。Unsymmetrical output voltage in two-stage matrix converter （TSMC） is mainly caused by unbalanced load, which can be decomposed into positive-, negative-, and zero-sequence components. In the paper, the representations of output voltage components are deduced both in positive- and in negative synchronous rotating frame （SRF）, the problem of closed-loop control method based on single SRF is analyzed. A novel closed-loop control method based on double SRF is proposed, which used two groups of PI controllers, one in the positive SRF is used to regulate the positive-sequence components ,the other in the negative SRF is used to regulate the negative components, the proposed control method can completely control both positive and negative components without error and restrain unbalanced load disturbances quickly Numerical simulation verified the validity and effectiveness of the proposed control method.

关 键 词：双级矩阵变换器 不平衡负载 正序dq坐标系 负序dq坐标系 PI闭环控制 

分 类 号：TM311[电气工程—电机]