Improving Differential Relay Performance during Cross-Country Fault Using a Fuzzy Logic-based Control Algorithm

2019 5th Conference on Knowledge Based Engineering and Innovation (KBEI) Pub Date : 2019-02-01 DOI:10.1109/KBEI.2019.8734991

M. Abasi, Ahmad Torabi Farsani, A. Rohani, Mohsen Aghazadeh Shiran

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引用次数: 9

Abstract

This paper presents a fuzzy logic-based algorithm to improve the performance of the differential relay in short transmission line protection for Cross-Country faults. This type of faults leads to the malfunction of current differential relays, while the probability of the relay performance error becomes negligible by using a fuzzy logic system along with the changes in per-unit values and the slope of the differential relay, and consequently choosing the best stability characteristics. In the proposed algorithm, the sensitivity, operation reliability, and performance speed for several types of faults including internal faults and even the high-resistive faults are maintained in the satisfactory levels. The algorithm is also suitable for external faults with the saturation of current transformers (CTs), and it improves the relay performance. The effectiveness of the algorithm is verified in EMTDC/PSCAD software program, and the obtained results are compared with those of conventional methods.

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利用模糊逻辑控制算法提高差动继电器在跨国故障中的性能

提出了一种基于模糊逻辑的差分继电保护算法，以提高差分继电保护短线跨国故障的性能。这种类型的故障导致电流差动继电器的故障，而随着差动继电器的单位值和斜率的变化，采用模糊逻辑系统，继电器性能误差的概率可以忽略不计，从而选择最佳的稳定特性。该算法对包括内部故障甚至高阻故障在内的几种故障的灵敏度、运行可靠性和性能速度都保持在令人满意的水平。该算法也适用于电流互感器饱和的外部故障，提高了继电器的性能。在EMTDC/PSCAD软件中验证了该算法的有效性，并与传统方法的结果进行了比较。

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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2019 5th Conference on Knowledge Based Engineering and Innovation (KBEI)

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