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An analysis of switching overvoltages in the EGAT 500 kV transmission system

机译：EGAT 500 kV输电系统中的开关过电压分析

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摘要

The level of transient overvoltage has a strong effect on power system reliability. It has already been known that switching overvoltages are the most important criteria which the design of insulation of extra high voltage (EHV) systems is based on. The reduction of switching surges is therefore an economic necessity. This paper illustrates switching overvoltages resulted from various switching conditions applied to all the existing 500 kV transmission lines of the Electricity Generating Authority of Thailand (EGAT) system. The study is performed with computer transient simulations using the PSCAD/EMTDC program. Details of the system modeling are outlined. The appropriate representation for the various components such as transmission lines, transformers, equivalent sources, shunt reactors, surge arresters and circuit breakers has been chosen. Switching representing the two most severe causes: line energization and line re-energization due to faults i.e. single phase to ground and three phases to ground are considered. Results are analyzed in this paper.
机译：瞬态过电压的水平对电力系统的可靠性有很大的影响。众所周知，开关过电压是超高压（EHV）系统绝缘设计的最重要标准。因此，减少开关浪涌是经济上的必要。本文说明了由泰国发电局（EGAT）系统的所有现有500 kV输电线路所应用的各种开关条件引起的开关过电压。该研究是使用PSCAD / EMTDC程序通过计算机瞬态仿真进行的。概述了系统建模的详细信息。已为各种组件（例如输电线路，变压器，等效电源，并联电抗器，电涌放电器和断路器）选择了合适的表示形式。开关代表了两个最严重的原因：考虑了由于故障（即单相接地和三相接地）引起的线路通电和线路重新通电。本文对结果进行了分析。

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  • 来源
    《NASCODE V》|1987年|p.149-153|共5页
  • 会议地点 Dublin(IE);Dublin(IE)
  • 作者

    Ngamsanroaj K.; Tayati W.;

  • 作者单位

    Dept. of Electr. Eng., Chiang Mai Univ., Thailand;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 结构、器件;
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