摘要
基于双傅里叶分析方法研究了应用于多电平逆变器现有的几种SPWM控制策略,比较得出输出线电压谐波最优的控制策略。针对级联多电平逆变器要求各单元均分负载功率,对最优SPWM控制策略进行了改进,改进后的最优SPWM控制策略在不影响输出电压的波形质量的同时保证了功率均衡,仿真分析和实验结果证明了理论分析的正确性。
This paper mainly analyzes several existing SPWM control strategies which have been widely used in the multilevel converter by means of the double Fourier analysis. By comparison, the optimal SPWM control strategy is picked out in yiew of the spectra of the output line voltage. In order to realize the power balance among all the units, this paper improves the optimal SPWM control strategy. The improved strategy not only realizes the power balance of each unit, but also do not influence the quality of the output voltage waveform. Simulation and experimental results verify the theoretical analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第5期92-99,共8页
Transactions of China Electrotechnical Society
