An SVM Approach for Five-Phase Current Source Converters Output Current Harmonics and Common-Mode Voltage Mitigation
An SVM Approach for Five-Phase Current Source Converters Output Current Harmonics and Common-Mode Voltage Mitigation
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DOI：
10.1109/tie.2019.2934055
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发表时间：
2020-07
影响因子：
7.7
通讯作者：
Jinwei He;Yuan Lyu;Junfei Han;Chengshan Wang
中科院分区：
文献类型：
--
作者：
Jinwei He;Yuan Lyu;Junfei Han;Chengshan Wang
本文针对五相电流源变换器（CSC）提出了一种增强的五段空间矢量调制（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，参考电流矢量由基面上相邻的4个大矢量和1个零矢量合成。同时，计算四个相邻大向量的停留时间，主动控制对应的电流在第三序列平面上的投影。此外，根据瞬时滤波电容电压绝对值排序选择零向量，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变换器（VSC）相比，有趣的是，CSC的CMV包络与它的三次谐波输出电流有很强的联系。然后，提出了一种五段支持向量机方法的序列安排，以保证向量状态转换过程中只有一次切换动作。最后，建立了类变压器损耗模型，以评估不同调制方式和矢量序列选择方法下CSC的损耗性能。
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.