摘要
传统多电平逆变器存在着不能升压的缺点而使其的应用受到限制。根据Z源网络可实现升降压的功能,提出将Z源网络应用到模块化多电平逆变器(MMC)中。通过对Z源网络和MMC的原理及运行状态的分析,设计出含Z源网络的MMC拓扑结构、升压策略、包含MMC子模块电容电压平衡控制的调制策略,通过控制Z源网络的直通占空比就可以灵活控制输出电压。仿真结果验证了新型拓扑结构和控制策略的正确性和优越性。
Because traditional multi-level inverter can＇t boost the voltage, its application is limited. As the Z-source network can boost and buck voltage,the combination of Z-source and MMC （Modular Multilevel Converter）is put forward. The topology of Z-source based MMC, control of MMC sub-module capacitor voltage boosting voltage strategy and modulation strategy including balance have been designed by analyzing operation principle and running status of Z-source network and MMC, thus the output voltage can be controlled flexibly by controlling direct duty ratio of Z-source network. Finally, the validity and superiority of this topology and control strategy are validated by simulation results.
出处
《电子器件》
CAS
北大核心
2014年第5期978-982,共5页
Chinese Journal of Electron Devices
基金
山西省研究生优秀创新项目(20133112)
太原科技大学校博科技研究启动基金(20122033)
山西省高校教改项目(J2011130)
山西省高校教改项目(J2013064)
关键词
电力电子
模块化多电平逆变器
仿真
Z源网络
电容电压平衡控制
调制策略
直通占空比
power electronics
modular multilevel converter
simulation
Z-source network
capacitor voltage balancecontrol
modulation strategy
direct connection duty ratio
