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首页> 外文期刊>Electric power systems research >Second- and third-zone performance assessment of a symmetrical component based improved fault impedance estimation method
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Second- and third-zone performance assessment of a symmetrical component based improved fault impedance estimation method

机译：基于对称分量的改进的故障阻抗估计方法的第二区和第三区性能评估

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摘要

The performance assessment of a symmetrical component based fault impedance estimation method that has previously been proposed by the authors is discussed in this paper. A brief review of the proposed method is given. The personal computer based Alternative Transient Program was used in these performance assessment studies. Voltage and current signals for various fault conditions were generated by simulating different types of fault on a selected transmission line of a sample power system. These signals were processed, sampled, and used in the proposed method. The apparent impedance of the protected transmission line from the relay location up to the fault point was calculated using the proposed method. These impedance estimates were inserted in R-X plane characteristics to determine the suitability of the proposed method for digital distance protection of the second and third zones. The results of these performance assessment studies are presented and discussed in the paper.
机译：本文讨论了作者先前提出的基于对称分量的故障阻抗估计方法的性能评估。对提出的方法进行了简要回顾。在这些性能评估研究中使用了基于个人计算机的“替代暂态程序”。通过模拟示例电力系统的选定传输线上的不同类型的故障，可以生成各种故障条件的电压和电流信号。这些信号经过处理，采样并在提出的方法中使用。使用所提出的方法，计算了从继电器位置到故障点的受保护传输线的视在阻抗。将这些阻抗估计值插入R-X平面特性中，以确定所提出的方法对第二和第三区域进行数字距离保护的适用性。这些绩效评估研究的结果将在本文中进行介绍和讨论。

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