摘要
对基于不对称规则采样法的级联H桥型多电平变流器的CPS-SPWM输出电压的谐波特性进行了分析研究。通过理论分析、仿真和实验验证,得出以下结论:在三角载波频率ωc远大于调制波频率时,N级联变流器的CPS-SPWM输出电压的基波分量在相位上滞后正弦调制波1/4个载波周期;谐波主要分布在偶数倍的Nωc附近,且呈奇数次分布。
Based on the irregular sampling method,the harmonic characteristics of the CPS-SPWM output voltage of cascaded H-bridge multilevel converters are analyzed in this paper.Simulation and experimental results show that,on condition that the carrier wave frequency defined as ？c is much larger than the sinusoidal modulation wave frequency,the fundamental component of the CPS-SPWM output voltage will lag the modulation wave a quarter of carrier wave period.Additionally,the odd harmonic components mainly distribute near the even times the number of N？c,while the even harmonic components are eliminated.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第6期121-128,共8页
Transactions of China Electrotechnical Society
基金
国家"十一五"科技支撑计划重点项目(2007BAA12B03)
江苏省科技支撑项目(BE2008072
BE2008123)资助
