应用于高速铁路中基于PWM原理的高频共振抑制

OPAL-RT

摘要
在中国，高频共振经常发生，且会严重扰乱正常的高速铁路施工。这篇论文首先介绍了共振机理，它显示在列车的牵引传动系统中多个四象限转换器的复合脉冲电压即是谐波源。接着，文章建议在牵引传动系统中安装谐振消谐PWM以消除系统中的高频共振。文章介绍了最优换向角度和决定出初始换向角度的目标函数，并用Levenberg-Marquardt（LM）法得出了最优换向角度。最后，通过RT-LAB进行了验证试验，并将安装RHEPWM前后的性能做了比较。结果显示，RHWPWM不但可以抑制共振，并且提高了总功率、改善了受电弓电流的失真。
Abstract
High-frequency resonances occur frequently and severely disrupt the normal high-speed railway operation in China. In this paper, the resonance mechanism, which indicates that the composited pulse voltage of the multiple four-quadrant converters in the train’s traction drive system is the harmonic source, was firstly introduced. Then in order to eliminate the resonant harmonics in the source, the resonant harmonic elimination PWM (RHEPWM) was proposed to be applied in the traction drive system. The target function for the optimal commutating angles and the decision of the initial commutating angles were presented, and the optimal commutating angles were resolved by the rolling Levenberg-Marquardt (LM) method. Finally, the experimental verification was implemented with a RT-Lab simulator and the performance before and after the application of the RHEPWM was compared. The results verify that the RHEPWM not only has the capacity to suppress resonances, but also improves the total power factor and mitigates the distortion in the pantograph current.
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