| 和应涌流对差动保护的影响因素分析及防范措施 |
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| 引用本文： | 郑涛,赵萍.和应涌流对差动保护的影响因素分析及防范措施[J].电力系统自动化,2009,33(3):74-78. |
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| 作者姓名： | 郑涛 赵萍 |
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| 作者单位： | 1.华北电力大学电力系统保护与动态安全监控教育部重点实验室，北京市 102206; 2.台州电业局，浙江省台州市 317000 |
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| 摘 要： | 和应涌流可能引起主设备保护的误动，目前还鲜有针对和应涌流的有效防范措施。分析了和应涌流的产生机理，指出和应涌流本身并不会引起差动保护误动。针对现场运行中较多采用的二次谐波制动原理，研究了该原理在发生和应涌流时，不同电流互感器（TA）传变特性下的适用性，指出由和应涌流引发的TA局部暂态饱和是导致差动保护误动的重要因素之一。最后，提出一种比率制动特性的修正方案以避免由于TA局部暂态饱和引起的差动保护误动。
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| 关 键 词： | 变压器保护 和应涌流 二次谐波制动原理 TA局部暂态饱和 |
| 收稿时间： | 8/29/2008 3:07:20 PM |
| 修稿时间： | 1/15/2009 2:53:10 PM |
Analysis of Influence Factors of Sympathetic Inrush on Differential Protection and Its Solutions |
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| ZHENG Tao,ZHAO Ping.Analysis of Influence Factors of Sympathetic Inrush on Differential Protection and Its Solutions[J].Automation of Electric Power Systems,2009,33(3):74-78. |
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| Authors: | ZHENG Tao ZHAO Ping |
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| Affiliation: | 1.Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Under Ministry of Education;North China Electric Power University;Beijing 102206;China;2.Taizhou Electric Power Company;Taizhou 317000;China |
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| Abstract: | Sympathetic inrush may cause mal-operation of transformer or generator protection.Effective measures to avoid the mal-operation of differential protection caused by sympathetic inrush are still not found.The physical mechanism of emerging sympathetic inrush is analyzed.According to the characteristic of sympathetic inrush,mal-operation of differential protection should not be directly caused by sympathetic inrush.Due to 2nd harmonic restrain theory widely used in practice,its adaptability under different tr... |
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| Keywords: | transformer protection sympathetic inrush 2nd harmonic restrain theory current transformer partial transient saturation |
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