In this article, an enhanced five-segment space vector modulation (SVM) approach is proposed for a five-phase current source converter (CSC) to simultaneously reduce its output current harmonics and common-mode voltage (CMV). To realize proper output current harmonics mitigation, the reference current vector is synthesized by adjacent four large vectors and one zero vector in the fundamental plane. At the same time, the dwell times of four adjacent large vectors are calculated to actively control the corresponding current projection in the third sequence plane. In addition, the zero vector is selected according to the ranking of the instantaneous filter capacitor voltage absolute value to reduce the peak CMV. Comparing to voltage source converter (VSC) counterparts where the CMV is not affected by the ac output voltage and current harmonic components, it is interesting to find that the CMV enveloping of the CSC has a strong connection with its third harmonic output current. Then, a sequence arrangement for the five-segment SVM approach is proposed to ensure only one switch action during vector states transition. Finally, a transformerlike loss model is established to evaluate the loss performance of the CSC with a different modulation approach and a vector sequence selection method.

中文翻译：

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五相电流源转换器输出电流谐波和共模电压缓解的 SVM 方法

在本文中，针对五相电流源转换器 (CSC) 提出了一种增强型五段空间矢量调制 (SVM) 方法，以同时降低其输出电流谐波和共模电压 (CMV)。为了实现适当的输出电流谐波抑制，参考电流矢量由相邻的四个大矢量和基波平面中的一个零矢量合成。同时计算相邻四个大向量的驻留时间，主动控制对应的当前在第三序列平面的投影。此外，根据瞬时滤波电容电压绝对值的排序选择零向量，以降低峰值CMV。与 CMV 不受交流输出电压和电流谐波分量影响的电压源转换器 (VSC) 对应物相比，有趣的是发现 CSC 的 CMV 包络与其三次谐波输出电流有很强的联系。然后，提出了五段 SVM 方法的序列安排，以确保在矢量状态转换期间只有一个开关动作。最后，建立了类似变压器的损耗模型，以评估具有不同调制方法和矢量序列选择方法的 CSC 的损耗性能。