Development of Distance Relay Based on Wide-Area Protection for Transmission Systems of Provincial Electricity Authority

2020 International Conference on Smart Energy Systems and Technologies (SEST) Pub Date : 2020-09-01 DOI:10.1109/SEST48500.2020.9203406

Chaiwat Maneekorn, S. Premrudeepreechacharn, A. Supannon, Rachawadee Puangsukra

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Abstract

Recently, distance relays are used in conventional protection to protect the transmission system, which consists of primary and back up protections. However, the primary protection used in traditional protection cannot be designed to cover the entire length of the transmission line. Moreover, the rapid increase in distributed generations (DGs) connected to the transmission line may increase fault impedance seen through distance relay. It results in an under-reach and miscoordination problem due to incorrect impedance calculation. In this paper, the development of distance relay based on Wide-Area Protection (WAP) for transmission systems is presented. The proposed method enjoins to instantly collect information of the distance relay and the circuit breaker status in local substations and nearby substations. The simulation is developed by using the DigSILENT PowerFactory program. The results present that the proposed method can improve the stability and reliability of the protection system and overcome such a problem.

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省电力局输电系统广域保护距离继电器的研制

目前，在传统保护中多采用距离继电器对输电系统进行保护，它分为主保护和后备保护两部分。然而，传统保护中使用的初级保护不能设计成覆盖整个传输线的长度。此外，连接到传输线上的分布式代(dg)的快速增加可能会增加通过距离继电器看到的故障阻抗。由于不正确的阻抗计算，导致了欠伸和不协调问题。本文介绍了基于广域保护(WAP)的距离继电器在传输系统中的发展。该方法要求实时采集本站和附近变电站的距离继电器和断路器状态信息。仿真是利用DigSILENT PowerFactory程序开发的。结果表明，该方法可以提高保护系统的稳定性和可靠性，克服了这一问题。

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

2020 International Conference on Smart Energy Systems and Technologies (SEST)

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