文章摘要
一起距离保护误动事例分析以及解决方案
Analysis of a Case of Distance Protection Mal-operation and Solution
投稿时间:2017-01-18  修订日期:2017-02-10
DOI:
中文关键词: 距离保护,误动,正序电压,极化电压,工作电压,非全相
英文关键词: Distance protection  Mal-operation  Positive voltage  Polarization voltage  Operation voltage  Open pole.
基金项目:
作者单位E-mail
沈军 南京南瑞继保电气有限公司 SHENJ@NREC.COM 
张洪喜 南京南瑞继保电气有限公司  
王忠 南京南瑞继保电气有限公司  
赵青春 南京南瑞继保电气有限公司  
朱晓彤 南京南瑞继保电气有限公司  
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中文摘要:
      简介:作为后备保护,距离保护被广泛作为各电压等级的线路及元件保护,为确保方向性,距离保护一般采用正序电压作为极化电压,但正序极化电压在某些特殊运行工况下会存在不足。本文介绍了一起单侧电源系统距离保护Ⅰ段在反向故障时误动的事例,分析了当前利用正序电压作为距离保护极化电压存在的缺陷,并提出了相应的解决方案,RTDS实验结果验证了本方案的正确性。
英文摘要:
      As a kind of backup protection, distance protection is widely applied to protect lines of different voltage levels. In order to ensure the direction, positive sequence voltage is used as the polarization voltage for distance protection, however there are some defects existed under certain special condition with positive sequence voltage as polarization voltage. This paper analyzes a mal-operation case of distance protection for a reverse fault, introduces the disadvantages based on the use of positive sequence polarization voltage, and proposed the corresponding solution, RTDS experiment results validate the correctness of the scheme.
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