基于CO-SFO-PWM级联型多电平逆变器的研究  

The Research of the Multi-level Inverter Circuit Based on CO-SFO-PWM

作　　者：孙玉坤[1] 马萍[1] 刘杰[1] 

机构地区：[1]江苏大学,电气信息工程学院,江苏镇江212013

出　　处：《电力电子技术》2011年第4期70-72,共3页Power Electronics

摘　　要：选取级联型多电平拓扑作为中高压变流器的拓扑结构,对多电平逆变电路及其PWM技术进行了研究,并对级联型9电平逆变器的工作原理进行了分析。采用新型CO-SFO-PWM技术进行级联型9电平逆变器实验,实验结果表明该新型PWM技术不仅在低调制度下可明显改善输出波形,而且在高调制度下同样可获得较低的THD的输出波形,并且提高了直流侧电压利用率。The article selects the cascade multilevel topological as the topological structure of the cascaded medium-high voltage converter,and focuses on the multi-level inverter circuit and pulse width modulation（PWM） technology,analysis the working principle of cascade nine-level inverter.Also,new CO-SFO-PWM technology is used to have a simulation on cascade nine-level inverter.The experimental results show that the new PWM technology can significant-ly improve quality of the output wave at low modulation ratio,and has low THD of the output wave at high modula-tion ratio,moreover,it can increase utilization of DC-side voltage.

关 键 词：逆变器 级联型 多电平 脉宽调制 

分 类 号：TM464[电气工程—电器]