Some novel techniques for improving power quality in distribution networks

2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies. Proceedings Pub Date : 2004-04-05 DOI:10.1109/DRPT.2004.1338512

Zeng Xiangjun, K. Li, W. L. Chan, Yin Xianggen

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引用次数: 5

Abstract

Power quality is influenced by neutral grounding methods in distribution systems. Optimization for neutral grounding methods is discussed in the paper. Petersen-coil in parallel with high resistance earthed technique has a better performance in safety and power quality than other neutral point grounding techniques. To improve power quality, a novel method for measurement of zero sequence impedance in distribution systems is presented, Petersen-coil inductance is adjusted to compensate the total capacitance, and the resistor which is in parallel with the Petersen-coil is adjusted to control the over-voltage; some other novel techniques for grounding fault feeder protection based on testing the fault resistance or the energy dissipated in the fault point are also presented. The method of Petersen-coil tuning has been developed. Experimental results show that the optimization for neutral grounding methods and the protections proposed can improve the power quality by reducing the over-voltage, the residual current and the grounding fault duration.

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改善配电网电能质量的一些新技术

配电网中性点接地方式对电能质量有重要影响。本文讨论了中性点接地方法的优化问题。彼得森线圈并联高阻接地技术在安全性和电能质量方面优于其他中性点接地技术。为了改善电能质量，提出了一种测量配电系统零序阻抗的新方法，通过调整彼得森线圈的电感来补偿总电容，通过调整与彼得森线圈并联的电阻来控制过电压;本文还介绍了基于故障电阻或故障点能量损耗测试的接地故障馈线保护新技术。提出了彼得森线圈调谐的方法。实验结果表明，中性点接地方法和保护措施的优化可以通过降低过电压、剩余电流和接地故障持续时间来改善电能质量。

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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2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies. Proceedings

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