| 电流互感器饱和引起的保护误动分析及试验方法 |
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| 引用本文： | 王奕. 电流互感器饱和引起的保护误动分析及试验方法[J]. 广东电力, 2005, 18(1): 16-18 |
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| 作者姓名： | 王奕 |
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| 作者单位： | 广东省电力试验研究所,广东,广州,510600 |
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| 摘 要： | 近年来．广东省内多个发电厂出现过高压厂用变压器或起动一备用变压器在区外故障时或厂用大容量电动机起动时差动保护误动作的情况。为此．介绍了通过电流互感器伏安特性试验确定其饱和特性的方法．并用试验验证了这种方法的可行性。最后提出了关于避免差动保护因电流互感器饱和而误动的措施。
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| 关 键 词： | 电流互感器 饱和 差动保护 误动作 伏安特性试验 |
| 文章编号： | 1007-290X(2005)01-0016-03 |
| 修稿时间： | 2004-05-18 |
Analyses and tests on relay misoperation caused by saturation of current transformers |
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| WANG Yi. Analyses and tests on relay misoperation caused by saturation of current transformers[J]. Guangdong Electric Power, 2005, 18(1): 16-18 |
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| Authors: | WANG Yi |
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| Abstract: | In recent years,the HV auxiliary transformers or starting/standby transformers in multiple power plants in Guangdong experienced differential relay misoperation during external faults or the start-up of auxiliary large-capacity motors.Therefore,this paper describes the method of determining current transformer(CT)saturability by volt-ampere characteristic tests.The feasibility of this method is validated by experiments,and suggestions on avoiding differential relay misoperation caused by CT saturation are presented as well. |
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| Keywords: | current transformer saturation differential protection misoperation volt-ampere characteristic test |
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