减小STATCOM直流母线电压失真的影响

Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521) Pub Date : 2004-05-12 DOI:10.1109/MELCON.2004.1348248

B. Blazic, I. Papič

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引用次数: 4

摘要

本文提出了一种减小直流母线畸变电压对PWM控制的STATCOM工作影响的控制技术。直流母线电压纹波是补偿器和网络之间的谐波或不平衡电流交换的结果，并在交流侧引起额外的谐波失真，这是不允许补偿器运行的。所提出的直流纹波缓解技术是基于开关功能的调制，使器件能够在扭曲的直流母线电压下工作，并允许在直流侧使用相对较小的电容器。通过PSCAD/EMTDC程序的数字仿真验证了所推导的控制算法，并对STATCOM在不平衡条件下(不平衡网络电压)工作的情况进行了评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Minimizing the effect of a distorted DC-bus voltage of a STATCOM

This paper proposes a control technique for minimizing the effect of a distorted DC-bus voltage on the operation of a PWM controlled STATCOM. A DC-bus voltage ripple occurs as a consequence of harmonic or unbalanced currents exchange between the compensator and the network and causes additional harmonic distortion on the AC side, which is not permissible for compensator operation. The proposed DC-ripple mitigation technique is based on the modulation of the switching function enabling the device operation with distorted DC-bus voltage and allowing the use of a relatively small capacitor on the DC side. The derived control algorithm is validated by means of digital simulation in the PSCAD/EMTDC program where a case of a STATCOM operating under unbalanced conditions (unbalanced network voltage) was evaluated.

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Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521)

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