摘要
介绍了当前主流高压变频器系统的拓扑结构及原理,重点分析了模块化多电平变换器(modular multilevel converter,MMC)技术原理;在此基础上提出基于MMC技术的高压变频器系统(MMC-HVI)结构,并对比级联型高压变频器分析了新系统功率单元数及电平数的选取;然后以上下桥臂12个功率单元为例,进行仿真,验证了系统拓扑结构及调制算法,并揭示本系统需要面对和解决的难题。
This paper introduces topologies and principles of the current popular high-voltage converter system, analyzes the principles of MMC （Modular Multilevel Converter）. On these foundations, the structure of high-voltage inverter is proposed based on MMC technology, and the selection of unit number and level number of the new system is analyzed through comparing cascaded high-voltage inverters. Taking 12 power units of the bridge ann as an example, the simulation is carried out, the system topology and modulation algorithm are verified, and the problems required to confront and solve are revealed.
出处
《大功率变流技术》
2012年第5期17-22,共6页
HIGH POWER CONVERTER TECHNOLOGY
关键词
高压变频器
MMC技术
移相调制
high-voltage inverter
modular multilevel converter technology
phase-shifting modulation
