引用本文: | 孙金风,崔琪,郭怀德,等.双回线复故障CSL-162B微机保护动作行为分析及改进建议[J].电力系统保护与控制,2007,35(24):74-75,78.[点击复制] |
SUN Jin-feng, CUI Qi,GUO Huai-de,et al.Analysis and improvement about CSL-162B microprocessor-based protection in combined failure of double-circuit transmission line[J].Power System Protection and Control,2007,35(24):74-75,78[点击复制] |
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摘要: |
微机继电保护装置在电力系统的应用越来越广泛,但实际应用中的部分微机保护在一些运行方式下不能满足现场要求,从城市电网的发展情况看,双回线短线路的接线方式会逐渐增加,在复故障情况下,保护误动的机率随着上升。因此,对X′和R′的取值应由整定计算依据接线情况,反向保护范围、LH和YH传变误差及微机保护在精确工作电压以下的测量误差等多方面原因,进行综合考虑合理选取定值,从而避免电网特殊故障时引起保护不正确动作,造成事故扩大。针对CSL-162B微机保护在双回线复故障情况下的动作行为分析,指出了保护存在的问题,提出了 |
关键词: 微机保护 双回线短线路 复故障 小矩形 |
DOI:10.7667/j.issn.1674-3415.2007.24.018 |
投稿时间:2007-06-11修订日期:2007-08-19 |
基金项目: |
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Analysis and improvement about CSL-162B microprocessor-based protection in combined failure of double-circuit transmission line |
SUN Jin-feng1,CUI Qi1,GUO Huai-de2,BAI Ya-wei2 |
(1.Xi’an Power Supply Bureau, Xi’an 710032,China;2.Xi’an Electric Power College, Xi’an 710032,China) |
Abstract: |
Microprocessor based protection has been widely applied in power system recently. However, part of them can not satisfy the local needs of the power system under some operation modes in practical application. Mode of connection of short double-circuit transmission lines increase gradually along with the development of urban power grids and the probability of protection false action add as well in combined failure. Therefore, in order to avoid protection false action and accident enlargement when electric network special failures happen,the setting value of X’ and R’ must be comprehensively considered based on the zone of protection in the opposite direction ,the transform errors of current transformer and potential transformer, the measurement error under exactitude operating voltage etc and rationally chosen according to the mode of connection. This paper analyzes the action about CSL-162B microprocessor based protection in combined failure of double-circuit transmission line, to indicate the existing problems of this protection, and to submit the improvement measures to prevent the occurrence of same kind faults. |
Key words: microprocessor-based protection short double-circuit transmission line combined failure small rectangle |