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.
出处
《电测与仪表》
北大核心
2015年第7期57-60,90,共5页
Electrical Measurement & Instrumentation
基金
"青蓝工程"资助项目
