一起串联补偿线路跳闸故障的分析

doi:10.11930/j.issn.1004-9649.2014.7.81.4

中国电力 ›› 2014, Vol. 47 ›› Issue (7): 81-85.DOI: 10.11930/j.issn.1004-9649.2014.7.81.4

一起串联补偿线路跳闸故障的分析

李振动¹, 李代君¹, 臧斌¹, 尚东慧¹, 石鑫²

1. 国网冀北电力有限公司检修分公司,北京 102488;
2. 国网咸宁供电公司,湖北咸宁 437100

收稿日期:2014-03-13 出版日期:2014-07-18 发布日期:2015-12-10
作者简介:李振动（1984—）,男,北京人,硕士,工程师,从事变电检修工作。E-mail: vibrateli@163.com

Analysis for a Trip Fault in a Series Compensation Circuit

LI Zhen-dong¹, LI Dai-jun¹, ZANG Bin¹, SHANG Dong-hui¹, SHI Xin²

1. State Grid Jibei Electricity Power Maintenance Company, Beijing 102488, China;
2. State Grid Xianning Power Company, Xianning 437100, China

Received:2014-03-13 Online:2014-07-18 Published:2015-12-10

摘要/Abstract

摘要： 针对某超高压500 kV串补输电线路因选区偏转而引起的三相跳闸事故,探讨了故障时串补保护和线路保护的动作行为。搭建与实际一致的仿真模型,代入现状运行方式下的具体参数,通过RTDS对模型进行数字模拟实验,分析发现,其保护动作行为符合设计原理和录波数据,当系统仅发生单相经过渡电阻故障,且串补仅B相MOV暂态导通时,选区确实会发生偏转,造成2套线路保护选相不一致,扩大事故范围。结合实例,深入研究串补是否投入情况下单、双回运行线路的单相接地故障,得出零、负序电流选区出现误选的条件,并给出可行的解决方案。

关键词: 串联补偿, 选区偏转, 过渡电阻, 电流反向

Abstract: A three-phase trip fault in a series compensation circuit of 500 kV caused by the selected-area deflection was analyzed, which took into account of the behaviors of the series compensation relay and line relay. Based on the real circuit, a simulation model was established and the simulation with the parameters corresponding to the operation condition was conducted by using RTDS. It was found that the behaviors of relays were in accordance with the principles of design and recorded data. When a single phase fault through the transition resistance and transient conduction in phase B of series compensation’s MOV occur, the selected-area deflection will take place and the two-line relays will select different phases, which will amplify the fault area. Based on case analyses, the phase-to-ground faults at single or double circuits, when the series compensation works or not, were researched, respectively. The error conditions of zero and negative current areas were obtained. Moreover, some feasible solutions in the actual situation were proposed as well.

Key words: series compensation, selected-area deflection, transition resistance, current reverse

中图分类号:

TM773

李振动, 李代君, 臧斌, 尚东慧, 石鑫. 一起串联补偿线路跳闸故障的分析[J]. 中国电力, 2014, 47(7): 81-85.

LI Zhen-dong, LI Dai-jun, ZANG Bin, SHANG Dong-hui, SHI Xin. Analysis for a Trip Fault in a Series Compensation Circuit[J]. Electric Power, 2014, 47(7): 81-85.

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https://www.electricpower.com.cn/CN/Y2014/V47/I7/81

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一起串联补偿线路跳闸故障的分析

Analysis for a Trip Fault in a Series Compensation Circuit

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一起串联补偿线路跳闸故障的分析

Analysis for a Trip Fault in a Series Compensation Circuit

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