Analysis of distance relay trip regions for EHV and UHV transmission lines

2011 International Conference on Power and Energy Systems Pub Date : 2011-12-01 DOI:10.1109/ICPES.2011.6156630

K. Ravishankar, D. Thukaram

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引用次数: 2

Abstract

This paper presents comparative evaluation of the distance relay characteristics for UHV and EHV transmission lines. Distance protection relay characteristics for the EHV and UHV systems are developed using Electromagnetic Transients (EMT) program. The variation of ideal trip boundaries for both the systems are presented. Unlike the conventional distance protection relay which uses a lumped parameter model, this paper uses the distributed parameter model. The effect of larger shunt susceptance on the trip boundaries is highlighted. Performance of distance relay with ideal trip boundaries for EHV and UHV lines have been tested for various fault locations and fault resistances. Electromagnetic Transients (EMT) program has been developed considering distributed parameter line model for simulating the test systems. The voltage and current phasors are computed from the signals using an improved full cycle DFT algorithm taking 20 samples per cycle. Two practical transmission systems of Indian power grid, namely 765 kV UHV transmission line and SREB 24-bus 400kV EHV system are used to test the performance of the proposed approach.

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超高压、特高压输电线路距离继电器跳闸区分析

本文对特高压和超高压输电线路的距离继电器特性进行了比较评价。利用电磁瞬变(EMT)程序研究了超高压和特高压系统的距离保护继电特性。给出了两种系统的理想行程边界的变化情况。与传统距离保护采用集总参数模型不同，本文采用了分布参数模型。文中强调了较大的并联电纳对跳闸边界的影响。对超高压和特高压线路中具有理想跳闸边界的距离继电器的性能进行了各种故障位置和故障电阻的测试。考虑分布参数线模型，开发了用于测试系统仿真的电磁瞬变(EMT)程序。电压和电流相量的计算采用改进的全周期DFT算法，每周期取20个样本。利用印度电网765 kV特高压输电线路和SREB 24母线400kV特高压输电系统两个实际输电系统，对所提方法的性能进行了测试。

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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2011 International Conference on Power and Energy Systems

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