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首页> 外文期刊>IEEE Transactions on Power Electronics >A Three-Level Space Vector Modulation Scheme for Paralleled Converters to Reduce Circulating Current and Common-Mode Voltage
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A Three-Level Space Vector Modulation Scheme for Paralleled Converters to Reduce Circulating Current and Common-Mode Voltage

机译：并联转换器的三级空间矢量调制方案，以降低循环电流和共模电压

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For high-power applications, paralleling converters is a popular approach to increase the power capacity of the system. Circulating current has been a major concern for the implementation of paralleled converters. This paper proposes a three-level space vector modulation (SVM) scheme for a system with two paralleled voltage-source converters (VSCs) with common-mode inductor (CMI) or single-phase inductors. The proposed scheme aims to reduce the zero-sequence circulating current (ZSCC) and the magnitude of common-mode voltage (CMV) of the system simultaneously. The ZSCC patterns with respect to modulation schemes are first analyzed to provide a clear understanding of the generation of ZSCC. Based on the analysis, the proposed three-level modulation scheme is introduced. Furthermore, performance regarding the ZSCC peak value, impact on the common-mode current (CMC), CMI scaling analysis, and switching losses are analyzed and compared with the existing methods. The proposed method has been verified in both simulation and experiment.
机译：对于大功率应用，并行转换器是增加系统功率容量的一种流行方法。循环电流一直是并联转换器实现的主要关注点。本文针对具有两个带有共模电感器（CMI）或单相电感器的并行电压源转换器（VSC）的系统提出了一种三级空间矢量调制（SVM）方案。该方案旨在同时降低系统的零序循环电流（ZSCC）和共模电压（CMV）的幅度。首先针对调制方案分析ZSCC模式，以提供对ZSCC生成的清晰理解。在分析的基础上，介绍了所提出的三级调制方案。此外，分析了有关ZSCC峰值的性能，对共模电流（CMC）的影响，CMI缩放分析以及开关损耗，并将其与现有方法进行了比较。仿真和实验均验证了该方法的有效性。

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