基于PSO算法的三电平优化PWM方法  

A three-level optimal PWM method based on PSO algorithm

作　　者：刘盛烺[1] 宋奇吼[1] 陈莉[1] 杨飏[1] 

机构地区：[1]南京铁道职业技术学院,南京210031

出　　处：《电测与仪表》2015年第7期57-60,90,共5页Electrical Measurement & Instrumentation

基　　金："青蓝工程"资助项目

摘　　要：受大功率开关器件开关频率的限制,牵引逆变器输出波形中含有大量的谐波,所以有必要采用优化的脉宽调制(PWM)方法来减少牵引逆变器输出波形的谐波。首先,建立了最小电流总谐波畸变率(THD)谐波优化模型,并采用粒子群优化(PSO)算法对模型进行求解。其次,在分段同步调制的不同分频段上对PSO-PWM和传统正弦脉宽调制(SPWM)进行了比较,得到PSO-PWM具有良好谐波优化效果的结论。最后,用仿真和半实物实验结果验证了理论分析的正确性。Due to the switching frequency limitation of high power switch devices, traction inverter output waveforms contain a lot of harmonics. So it is necessary to use the optimal pulse width modulation （PWM） technique to reduce the harmonics of traction inverter output waveforms. Firstly, this paper develops the current total harmonic distortion （THD） minimization optimization model, and applies particle swarm optimization （PS0） algorithm to the solution of this model. Secondly, this paper gets the conclusion that optimal PWM has good harmonic optimization effect through the comparison of conventional SPWM method and optimal PWM method under different subsections of subsection syn- chronous modulation. Finally, the simulation and hardware-in-the-loop （HIL） experiment results verify the accuracy of theoretical analysis.

关 键 词：牵引逆变器 优化PWM 粒子群优化算法 总谐波畸变率 

分 类 号：TM921.2[电气工程—电力电子与电力传动]