摘要
载波移相(CPS)控制策略常用于级联型多电平逆变器,它可自然实现各级联单元输出功率平衡。但是,从输出线电压频谱分布来看,CPS控制没有同相层叠型(PD)控制好。因为将CPS直接应用于级联型多电平逆变器时,各级联单元不能自然实现输出功率均衡。受CPS控制三角载波位置关系的启发,提出一种改进PD控制。将PD的三角载波进行重构,不仅可保留输出线电压波形质量最优,同时还能自然实现各级联单元输出功率均衡。
Carrier phase shifted（CPS） control strategy is conventional for cascaded multi-level inverter,because it can naturally ensure all cascaded cells to output balanced power.However,in point of spectrum of the output line voltage,CPS is sub-optimal to phase disposition（PD） strategy.The reason is that the latter can not naturally ensure power balance.An improved PD strategy is presented which is inspirate from the disposition of CPS strategy triangle carriers.Just reconstructing the triangle carriers of PD strategy,it can not only reserve the waveform quality of the line voltage to be optimal,but also naturally ensure the output power of each cascaded cells to be balanced.
出处
《电力电子技术》
CSCD
北大核心
2014年第10期22-25,共4页
Power Electronics
关键词
逆变器
同相层叠型
载波移相
inverter
phase disposition
carrier phase shifted
