Reliability Analysis of Two Protection System Configurations for High Voltage Transmission Lines

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI:10.1109/EEEI.2006.321059

A. Lisnianski, D. Laredo, H. Ben Haim

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引用次数: 3

Abstract

Protection systems play a crucial role in power systems. The increasing demand for electric power leads to the complexity of the network and, therefore, to an increasing search for the improvement of the reliability of the high voltage (161 kV and over) line system protections. In order to achieve the required reliability level, the redundancy technique is often used. Two alternatives of redundancy are usually used. The first one is the use of two distance-protections connected in parallel, named as configuration {z, z}, and the second one is the use of one distance-protection and a differential-protection connected in parallel, named as configuration {z, Delta} . These two configurations are compared, in the paper, based on their calculated reliability. The comparison was made using new developed Markov stochastic models. Based on these models, the CIGRE reliability index for protection systems was computed for each configuration. It was shown that the configuration {z, z} is more reliable than the configuration {z, Delta} . Therefore, for high voltage line protection, where redundancy is required, it is recommended to use the configuration {z, z}.

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高压输电线路两种保护系统配置的可靠性分析

保护系统在电力系统中起着至关重要的作用。日益增长的电力需求导致了电网的复杂性，因此，人们越来越多地寻求提高高压(161千伏及以上)线路系统保护的可靠性。为了达到所要求的可靠性水平，通常采用冗余技术。通常使用两种备选的冗余。第一种是使用两个并联的距离保护，称为配置{z, z};第二种是使用一个距离保护和一个差动保护并联，称为配置{z, Delta}。本文根据计算的可靠性对这两种结构进行了比较。采用新开发的马尔可夫随机模型进行了比较。在此基础上，计算了不同配置下保护系统的CIGRE可靠性指标。结果表明，构型{z, z}比构型{z, Delta}更可靠。因此，对于需要冗余的高压线路保护，建议使用配置{z, z}。

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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来源期刊

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel

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