This paper proposes a hybrid space vector modulation (HBSVM) to reduce line current ripple while maintaining the optimal common mode voltage and zero sequence circulating current peak. The analysis reveals that the vector errors can be reduced by an equivalent basic vector with an adjustable length, which is synthesised by two basic vectors of the same vector angle. Then, a variable k is defined to denote the distribution of the two basic vectors. In addition, due to the implementation of k , a special vectors timing sequence is proposed. With the proposed generalised sequence, this paper investigates the current ripple over the switching period. Furthermore, we derive a map of the optimal distribution factor k _opt to minimise the current ripple. Each 30° sector is divided into three subsectors; each applies k _opt to minimise the current ripple. With the proposed two variables ( p and q ), a simple flowchart for k _opt selection in the whole space vector plane is developed. The proposed HBSVM uses the optimal distribution k _opt according to the position of the reference voltage, achieving the minimised line current ripple. The proposed HBSVM achieves the best line current quality while maintaining the optimal ZSCC and CMV peak, as validated by experiments.

中文翻译：

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基于空间矢量的混合PWM，可减少并联交错式三相两电平转换器中的线路电流纹波和共模电压

本文提出了一种混合空间矢量调制（HBSVM），以减少线路电流纹波，同时保持最佳共模电压和零序循环电流峰值。分析表明，矢量误差可以通过具有可调长度的等效基本矢量来减少，该基本矢量由具有相同矢量角度的两个基本矢量合成。然后，一个变量ķ被定义为表示两个基本向量的分布。另外，由于执行ķ 提出了一种特殊的矢量时序。利用提出的广义序列，本文研究了开关周期内的电流纹波。此外，我们得出了最佳分配因子的图ķ _选择最小化电流纹波。每个30°扇区分为三个子扇区。每个适用ķ _选择最小化电流纹波。提出了两个变量（ p 和 q ），一个简单的流程图 ķ 开发了整个空间矢量平面中的_opt选择。建议的HBSVM使用最佳分配ķ 根据参考电压的位置进行_选择，以实现最小的线路电流纹波。实验证明，提出的HBSVM可以在保持最佳ZSCC和CMV峰值的同时达到最佳的线路电流质量。