摘要
针对由多个三相电流源型桥式整流器并联组成的电流型多电平整流器(MCSR),采用传统的空间矢量脉宽调制(SVPWM)算法涉及大量三角函数运算,影响控制器的运算效率。该文研究一种基于三相电流型五电平整流器(5L-CSR)的60°坐标系SVPWM算法,该方法有效地简化了基本矢量及其作用时间的计算过程。并且针对均流电感存在的电流平衡问题,提出合理分配冗余开关组合作用时间和作用顺序的方法,使得单个调制周期内均流电感承受平均电压为零,进而解决了均流电感电流不平衡问题,实现了直流侧自均流。最后,搭建三相5L-CSR的仿真模型以及实验样机进行验证。
The multilevel current source rectifier(MCSR)consists of multiple paralleled three-phase current source bridge rectifiers.If the traditional space vector pulse width modulation(SVPWM)method is used,it involves a lot of trigonometric functions,which affects the data processing efficiency of the controller.Therefore,a space vector pulse width modulation method based on three-phase MCSR in 60°coordinate system is proposed,and the calculation process of basic vector and action time is simplified effectively.At the same time,a method for reasonably distributing the switching time and sequence of the redundant switch is proposed to balance dc current.Thus,the current balance inductance at each switching period withstands a zero average voltage,thereby solving the current imbalance problem of the balance inductance and realizing the automatic average of DC current.Finally,the simulation and experiment of three-phase 5L-CSR were carried out to verify the proposed method.
作者
张强
吴延飞
张保顺
张玉川
Zhang Qiang;Wu Yanfei;Zhang Baoshun;Zhang Yuchuan(School of Artificial Intelligence Hebei University of Technology,Tianjin 300131 China;Tianjin Z.T Architecture Design,Tianjin 300110 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第24期5134-5141,共8页
Transactions of China Electrotechnical Society
关键词
多电平
空间矢量脉宽调制
电流型整流器
均流电感电流平衡
Multilevel
space vector pulse width modulation
current source rectifier
average inductor current balancing
