| 电流互感器饱和对继电保护的影响及解决措施 |
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| 引用本文： | 李志武. 电流互感器饱和对继电保护的影响及解决措施[J]. 电力学报, 2009, 24(2): 137-139 |
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| 作者姓名： | 李志武 |
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| 作者单位： | 山西省电力公司忻州供电分公司,山西忻州,034200 |
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| 摘 要： | 电流互感器TA的特性是影响继电保护装置正确动作的重要因素。通过对TA工作特点和三相短路电流分析的介绍,详细分析了短路电流周期分量和非周期分量对TA饱和特性的影响。结果表明：短路电流中非周期分量对TA特性的影响远大于周期分量;对用于电流差动保护、零序过流保护装置的TA,应进行严格的励磁特性曲线试验,选用饱和倍数较大的电流互感器;还应当采用带制动特性的差动保护和适当提高零序过流保护的整定值,以躲过区外三相短路时由于各互感器励磁特性不一致产生的不平衡电流;并应当在微机差动保护装置中采用能躲过TA饱和的软件技术。
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| 关 键 词： | 特性 饱和 非周期分量 继电保护 |
The Influence and Solution to the Saturated State of the Electric Current Mutual Inductance Machine on Relay Protection |
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| LI Zhi-wu. The Influence and Solution to the Saturated State of the Electric Current Mutual Inductance Machine on Relay Protection[J]. Journal of Electric Power, 2009, 24(2): 137-139 |
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| Authors: | LI Zhi-wu |
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| Affiliation: | Shanxi Power Supply Crop.;Xinzhou Power Supply Branch;Xinzhou 034200;China |
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| Abstract: | The electric current mutual inductance machine TA's specific features is one of the important factors to relay protection correct motion.Through introducing the work features and the three-phase short circuit,the author analyzed the influence on TA's specific features,which is from the periodical branch quantity of the short circuit electric current and its non-periodical branch quantity.The results shows:Firstly,its non-periodical branch quantity influence is much higher than its periodical branch quantity... |
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| Keywords: | special features saturated state non-periodical branch quantity |
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