| 线路区外故障引起母差保护误动作分析及对策 |
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| 引用本文： | 黄涛.线路区外故障引起母差保护误动作分析及对策[J].江苏电机工程,2009,28(4):16-18. |
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| 作者姓名： | 黄涛 |
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| 作者单位： | 镇江供电公司,江苏,镇江,212001 |
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| 摘 要： | 分析了某220kV变电站由于某110kV线路重合于永久性故障，引起110kV母差保护误动的情况，即当该线路重合于C相永久性故障时，从该线路间隔观察到A相有一个毛刺电流，从而导致110kV母差保护A相动作。从理论上分析阐述了该事件发生的可能原因，并通过试验加以验证，针对这种情况提出相应的对策避免此类事件再次发生。
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| 关 键 词： | 线路故障 母差保护 TA饱和 误动作 |
Analysis and Measures of Misoperation of Bus Differential Protection Caused By Outside Faults |
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| HUANG Tao.Analysis and Measures of Misoperation of Bus Differential Protection Caused By Outside Faults[J].Jiangsu Electrical Engineering,2009,28(4):16-18. |
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| Authors: | HUANG Tao |
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| Affiliation: | Zhengjiang power supply company;Zhengjiang 212001;China |
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| Abstract: | A 110 kV bus differential protection misoperation is analyzed when a permanent fault is reclosed to the system in a 220 kV substation.When C-phase permanent fault is reclosed,a burr current appears in A-phase which causes the action of A-phase bus differential protection.The reason of misoperation is presented based on theoretical analysis,and is verified through test.Some measures are proposed to avoid the recurrence of similar accidents. |
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| Keywords: | line fault bus differential protection TA saturation misoperation |
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