A Space-Vector Modulation Method for Common-Mode Voltage Reduction in Current-Source Converters
A Space-Vector Modulation Method for Common-Mode Voltage Reduction in Current-Source Converters
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DOI：
10.1109/tpel.2013.2248025
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发表时间：
2014
影响因子：
6.7
通讯作者：
J. Shang;Y. Li
中科院分区：
文献类型：
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作者：
J. Shang;Y. Li
从转换器系统产生的共模电压（CMV）是许多问题的根源，例如，在电机驱动系统中，CMV可能出现在电机定子绕组相对于地的中性点处，并引起破坏性的轴承电流。在电压源换流器（VSC）和电流源换流器（CSC）系统中，都提出了简化CMV空间矢量调制（RCMV SVM）方法。现有的RCMV支持向量机通过避免使用零状态向量来降低CMV。然而，这将导致一些负面影响，如调制指数范围的缩小，开关频率的增加，双极性线间电压脉冲模式的电压源，电能质量性能恶化。本文提出了一种基于RCMV的支持向量机方法。通过允许使用零状态向量，所提出的RCMV SVM仍然产生低得多的CMV。然而，它的其他性能指标，如开关频率和谐波性能，不受影响，并与传统的支持向量机。仿真和实验结果验证了该方法的有效性。
The common-mode voltage (CMV) produced from a converter system is a source of many problems, e.g., in the motor drive system, CMV might appear at the neutral point of the motor stator windings with respect to the ground and induce destructive bearing current. Reduced CMV space-vector modulation (RCMV SVM) methods have been proposed in both voltage-source converter (VSC) and current-source converter (CSC) systems. The available RCMV SVMs reduce the CMV by avoiding using zero-state vectors. However, this will lead to some negative effects, such as shrink of modulation index range, increase of switching frequencies, bipolar line-to-line voltage pulse patterns in VSCs, and power quality performance deterioration. In this paper, a RCMV SVM method for CSCs is proposed. By allowing the use of zero-state vectors, the proposed RCMV SVM still produces much lower CMV. However, its other performance indices, such as switching frequency and harmonic performance, are unaffected and comparable to the conventional SVMs. The effectiveness of the proposed RCMV SVM for CSCs is verified in the simulations and experiments.