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三电平SHEPWM与SVPWM混合控制策略及其矢量平滑切换方法的研究

, PP. 342-349

Keywords: 三电平,SHEPWM,SVPWM,平滑切换

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Abstract:

本文提出了一种有源中点箝位(ANPC)三电平变换器的SHEPWM与SVPWM混合控制策略。充分利用两种控制策略的优点,在低频时采用SVPWM控制策略,获得较高的直流电压利用率,减小电流纹波;在中高频时采用SHEPWM控制策略消除特定的低次谐波。同时本文在研究了SHEPWM与SVPWM之间的联系以及对三电平变换器的影响的基础上,提出了一种可以实现在三电平SHEPWM与SVPWM两种控制方法之间,任意时刻平滑切换的方法。最后通过仿真与实验研究,验证了算法的正确性和有效性。

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