| 某变电站母差保护TA不平衡告警分析 |
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| 引用本文： | 张永伍,刘涛,宋文庆. 某变电站母差保护TA不平衡告警分析[J]. 电力系统及其自动化学报, 2011, 23(5): 147-150 |
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| 作者姓名： | 张永伍 刘涛 宋文庆 |
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| 作者单位： | 1. 天津市电力公司高压供电公司,天津,300250
2. 天津市电力公司技术中心,天津,300384 |
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| 摘 要： | 对可能引起某变电站220kVRCS-915AS型母差保护TA不平衡告警的各种原因进行了分析,并判定根本原因为:母联、分段中某个间隔三相接触电阻值大小不平衡,造成A、B、C三相电流在母线环内分配比例不一致,从而在母联、分段间隔中产生较大零序电流。使用RTDS搭建仿真模型对结论进行了验证,最后针对告警原因给出了相应的处理措施。
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| 关 键 词： | 母差保护 TA不平衡告警 RTDS |
TA Unbalance Alarm Analysis on 220 kV Bus-differential Protection of a Substation |
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| ZHANG Yong-wu,LIU Tao,SONG Wen-qing. TA Unbalance Alarm Analysis on 220 kV Bus-differential Protection of a Substation[J]. Proceedings of the CSU-EPSA, 2011, 23(5): 147-150 |
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| Authors: | ZHANG Yong-wu LIU Tao SONG Wen-qing |
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| Affiliation: | ZHANG Yong-wu1,LIU Tao2,SONG Wen-qing1(1.Tianjin Electric Power Corporation High Voltage Power Supply Company,Tianjin 300250,China,2.Tianjin Electric Power Corporation Technical Center,Tianjin 300384,China) |
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| Abstract: | A variety of possible causes which may lead to TA unbalance alarm of 220 kV RCS-915AS bus-differential protection in a substation are analyzed.It is confirmed that the root cause is: three-phase contact resistances of an interval between bus coupling and segment are different,which results in the inconsistent proportion of three phase currents distribution in the bus loop,and then zero-sequence current is generated in bus couple intervals and section intervals.A simulation model is built by RTDS for the ver... |
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| Keywords: | bus-differential protection TA unbalance alarm RTDS |
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