中国电力 ›› 2015, Vol. 48 ›› Issue (3): 88-93.DOI: 10.11930.2015.3.88

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直流接地极线路故障暂态行波传播特性分析

张怿宁1,王彩芝2,陈平3,李京3   

  1. 1. 中国南方电网超高压输电公司检修试验中心,广东 广州 510663;
    2. 国网滨州供电分公司,山东 滨州 256600;
    3. 山东理工大学 智能电网研究中心,山东 淄博 255049
  • 收稿日期:2014-11-29 出版日期:2015-03-25 发布日期:2015-11-27
  • 作者简介:张怿宁(1973—),男,内蒙古赤峰人,高级工程师(教授级),工学博士,从事超高压交直流输电系统自动化、故障测距、继电保护与控制的研究、仿真和检修工作。E-mail: 286285430@qq.com

Analysis of Propagation Characteristics of Transient Traveling Waves in HVDC Grounding Electrode Line Faults

ZHANG Yining1, WANG Caizhi2, CHEN Ping3, LI Jing3   

  1. 1. M&T Center, CSG EHV Power Transmission Company, Guangzhou 510633, China;
    2. Binzhou Power Supply Corporation,Binzhou 256600, China;
    2. Smart Grid Research Center, Shandong University of Technology, Zibo 255049, China
  • Received:2014-11-29 Online:2015-03-25 Published:2015-11-27

摘要: 高压直流输电系统接地极线路由于铺设的特殊性与复杂性,较易出现故障。介绍了接地极线路故障初始行波的产生机理,对接地极线路发生单线接地、两线短路和两线短路接地3种故障时的故障初始行波模量及其在直流中性母线端和接地极处的传播特性进行了详细的分析。以PSCAD/EMTDC为电磁暂态仿真分析平台,建立高压直流输电系统模型,通过高压直流输电系统单极大地回线模式下的接地极线路故障进行了仿真验证,仿真结果表明了分析的正确性。接地极线路故障暂态行波的传播特性分析为利用暂态行波实现接地极线路故障测距奠定理论基础。

关键词: 高压直流输电系统, 接地极线路, 暂态行波, 特性分析, PSCAD/EMTDC

Abstract: HVDC grounding electrode line faults tend to happen due to the specificity and complexity of line laying. In this paper, the mechanism of the traveling wave initiated by the grounding fault is introduced. Then the detailed analysis on the traveling wave modulus and the transmission characteristics in the DC neutral bus and the grounding electrode is conducted in terms of single line to ground fault, line to line fault and double line to ground fault, respectively. Based on the PSCAD/EMTDC electromagnetic transient simulation platform, the HVDC system model is established, in which the grounding fault in the single-pole grounding metal line mode is simulated and verified. The simulation results show the validity of the analysis. The analysis on the grounding fault and the propagation characteristics of the transient traveling wave can provide a theoretical foundation for grounding fault location by adopting transient traveling wave.

Key words: HVDC system, grounding line, transient travelling wave, characteristic analysis, PSCAD/EMTDC

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