电子器件
電子器件
전자기건
JOURNAL OF ELECTRON DEVICES
2014年
5期
977-981
,共5页
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
電力電子%模塊化多電平逆變器%倣真%Z源網絡%電容電壓平衡控製%調製策略%直通佔空比
전력전자%모괴화다전평역변기%방진%Z원망락%전용전압평형공제%조제책략%직통점공비
power electronics%modular multilevel converter%simulation%Z-source network%capacitor voltage balance control%modulation strategy%direct connection duty ratio
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。
傳統多電平逆變器存在著不能升壓的缺點而使其的應用受到限製。根據Z源網絡可實現升降壓的功能，提齣將Z源網絡應用到模塊化多電平逆變器( MMC )中。通過對Z源網絡和MMC的原理及運行狀態的分析，設計齣含Z源網絡的MMC拓撲結構、升壓策略、包含MMC子模塊電容電壓平衡控製的調製策略，通過控製Z源網絡的直通佔空比就可以靈活控製輸齣電壓。倣真結果驗證瞭新型拓撲結構和控製策略的正確性和優越性。
전통다전평역변기존재착불능승압적결점이사기적응용수도한제。근거Z원망락가실현승강압적공능，제출장Z원망락응용도모괴화다전평역변기( MMC )중。통과대Z원망락화MMC적원리급운행상태적분석，설계출함Z원망락적MMC탁복결구、승압책략、포함MMC자모괴전용전압평형공제적조제책략，통과공제Z원망락적직통점공비취가이령활공제수출전압。방진결과험증료신형탁복결구화공제책략적정학성화우월성。
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,boosting voltage strategy and modulation strategy including balance control of MMC sub-module capacitor voltage 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.
