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首页> 外文期刊>Power Electronics, IET >Space-vector-based hybrid PWM for reduced line current ripple and common mode voltage in paralleled interleaved three-phase two-level converter
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Space-vector-based hybrid PWM for reduced line current ripple and common mode voltage in paralleled interleaved three-phase two-level converter

机译：基于空间矢量的混合PWM，用于降低线电流纹波和共模电压在并联交错三相两级转换器中

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摘要

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 degrees 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.
机译：本文提出了混合空间矢量调制（HBSVM）来减少线电流纹波，同时保持最佳共模电压和零序循环电流峰值。该分析显示，通过具有可调节长度的等效基本向量可以减少矢量误差，其由相同矢量角的两个基本载体合成。然后，定义变量k以表示两个基本向量的分布。另外，由于k的实现，提出了一种特殊的矢量定时序列。采用所提出的广义序列，本文研究了开关周期的电流纹波。此外，我们得出了最佳分布因子K（OPT）的地图，以最小化电流纹波。每30度扇区分为三个分段;每个都适用k（opt）以最小化电流纹波。利用所提出的两个变量（P和Q），开发了整个空间矢量平面中的k（opt）选择的简单流程图。所提出的HBSVM根据参考电压的位置使用最佳分布k（选择），实现最小化的线电流纹波。如实验验证的，所提出的HBSVM在保持最佳ZSCC和CMV峰值的同时实现了最佳的线路电流质量。

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