| 一种新型变压器差动保护起动元件 |
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| 引用本文： | 谢伟,何人望,宋海燕.一种新型变压器差动保护起动元件[J].华东交通大学学报,2010,27(5):58-62. |
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| 作者姓名： | 谢伟 何人望 宋海燕 |
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| 作者单位： | [1]华东交通大学电气与电子工程学院,江西南昌330013 [2]湖南大学电气与信息工程学院,湖南长沙410082 |
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| 基金项目： | 华东交通大学科研基金资助项目 |
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| 摘 要： | 在电力变压器中,励磁涌流会引起变压器差动保护误动作。针对这一问题,提出一种新型的变压器差动保护起动元件———基于小波变换的行波识别起动元件,并且通过MATLAB中的simulink和wavemenu进行仿真。仿真结果表明,该起动元件可以正确识别励磁涌流与内部故障电流,从而能有效避免差动保护误动作。
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| 关 键 词： | 励磁涌流 差动保护 起动元件 小波变换 |
A New Transformer Differential Protection Starting Component |
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| Xie Wei,He Renwang,Song Haiyan.A New Transformer Differential Protection Starting Component[J].Journal of East China Jiaotong University,2010,27(5):58-62. |
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| Authors: | Xie Wei He Renwang Song Haiyan |
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| Institution: | 1.School of Electrical and Electronic Engineering,East China Jiaotong University,Nanchang 330013,China;2.School of Electrical and Information Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | Excitation inrush currents in a power transformer might result in differential protection misoperations.The paper presents a novel approach to this problem.A new transformer differential protection starting component based on wavelet transform wave identification is proposed,and simulations are performed with simulink and wavemenu of MATLAB.Simulation results show that the starting component can correctly distinguish excitation inrush currents from internal fault currents,and thus the differential protection misoperations can be effectively avoided. |
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| Keywords: | excitation inrush current differential protection starting component wavelet transform |
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