低压多电平功率变换器及其控制策略研究  

Research on Low Voltage Multilevel Converter and Its Control Strategy

作　　者：张艳莉[1] 都小利[1] 费万民[1] 

机构地区：[1]南京师范大学电气与自动化工程学院,江苏南京210042

出　　处：《自动化仪表》2008年第4期5-7,14,共4页Process Automation Instrumentation

基　　金：江苏省教育厅科技计划项目(编号:05KJD470115)

摘　　要：文章提出了开关选择和附加双向开关多电平变换器的主电路拓扑结构并研究了其控制策略。两种新型多电平变换器都具有可控开关数量少、电路简单、输出波形质量高、功率转换性能好的优点。在使用相同数目可控开关的条件下,附加双向开关变换器输出电平数更多、输出波形质量更高,直流电压利用率高,但功率变换效率低于开关选择变换器。采用PSIM 4.0对附加双向开关变换器进行仿真研究,结果证实该电路拓扑有效且实用。The topological structure of the main circuit of multilevel converters with switching selection and appendent bi-directional switches is proposed and the control strategy is researched. Both these converters feature advantages of less controllable switches, simple circuitry, high quality output waveform and good conversion performance. Under condition of adopting same quantity of the controllable switches, the converter with bi-directional switch offers more output levels of voltage, higher quality output waveform and high efficiency of DC voltage,but power conversion efficiency is lower than that of the converter with switching selection. Simulation using PSIM4.0 for converter with appendent bi-directional switches proves the validity and practicability of the topological structure of the circuit.

关 键 词：功率放大器 主电路 多电平 拓扑结构 控制策略 

分 类 号：TM464[电气工程—电器] TM76