一种基于60°坐标系的多电平逆变器控制策略  

A Control Strategy of the Multilevel Inverter Based on 60° Coordinates

作　　者：张旭[1] 宋文祥[1] 曹大鹏[1] 

机构地区：[1]上海大学,机电工程与自动化学院,上海200072

出　　处：《电力电子技术》2010年第12期94-96,共3页Power Electronics

基　　金：上海大学创新基金资助项目~~

摘　　要：多电平变换器在高压大容量工业场合得到了广泛的应用,采用合适的PWM控制策略是多电平变换器应用的关键。详细介绍了基于60°坐标系的空间矢量PWM算法,首先判断参考矢量位于哪个小三角形,其次计算合成基本矢量的作用时间,最后根据控制策略对冗余矢量选择合适的开关状态。所述SVPWM算法能够简化合成矢量作用时间的计算并可避免复杂的三角运算。通过合理利用每个开关矢量,得到多电平逆变器各空间矢量的开关函数,通过五电平逆变器仿真及三电平NPC逆变器实验,证实了所提出算法的有效性和正确性。Multilevel inverter is widely used in high-power high-voltage drive applications where an appropriate PWM control strategy is the key for the applications.A space vector PWM（SVPWM） algorithm based on 60° coordinates is analyzed.Firstly,reference vector is determined in which sector,and then the time of fundamental vectors are comput-ed according to reference vector,finally the selection of redundant switch states achieve a certain redundant vectors control objective.The described SVPWM algorithm has the advantages of simplifying the calculation of synthetic vector time and avoiding the complex triangle operations.The turn-on function of every space vector is presented by using all space vectors.The algorithm＇s effectiveness and accuracy are proved by the simulation and the experimental results.

关 键 词：逆变器 多电平 空间矢量脉宽调制 

分 类 号：TM464[电气工程—电器]