Analysis of Switching Overvoltage and Suppression Measures in UHV Transmission Lines

IF 1.7 Q2 Engineering

Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique Pub Date : 2019-08-21 DOI:10.1109/CJECE.2019.2906670

H. Yanan, Han Bin, Xiang Zutao

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引用次数: 3

Abstract

As the ultrahigh-voltage (UHV) projects are rapidly developing, it is necessary to investigate the problems involved in overvoltage and insulation, thereby providing a technical basis for future UHV projects. The switching overvoltage of closing no-load lines was simulated and analyzed here using two kinds of typical UHV network structures: the power plant to the grid system and the grid-to-grid system. Different factors, such as line length, mode of operation on the power plant side, and short-circuit capacity, are considered. It is possible for lines shorter than 60 km to eliminate the closing resistor, determined by calculating the probability of flashover. We analyzed the phase selection closing in depth to inhibit the switching overvoltage and considered the factors such as phase deviation and the length of the line. Finally, the applicability of phase selection closing is put forward for lines of different lengths.

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特高压输电线路操作过电压分析及抑制措施

随着特高压工程的快速发展，有必要对过电压和绝缘问题进行研究，从而为今后的特高压工程提供技术基础。本文采用两种典型的特高压网络结构:电厂对电网系统和电网对电网系统，对合闸空载线路的开关过电压进行了仿真分析。考虑了不同的因素，如线路长度、电厂侧运行方式和短路容量。对于短于60公里的线路，可以通过计算闪络的概率来消除合闸电阻。深入分析了抑制开关过电压的选相合闸，并考虑了相位偏差和线路长度等因素。最后，提出了选相合闸对不同长度线路的适用性。

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

Canadian Journal of Electrical and Computer Engineering-Revue Canadienne De Genie Electrique et Informatique 工程技术-工程：电子与电气

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期刊介绍： The Canadian Journal of Electrical and Computer Engineering (ISSN-0840-8688), issued quarterly, has been publishing high-quality refereed scientific papers in all areas of electrical and computer engineering since 1976