| 应用小波检测故障突变特性实现配电网小电流故障选线保护 |
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| 引用本文： | 贾清泉,刘连光,杨以涵,宋家华.应用小波检测故障突变特性实现配电网小电流故障选线保护[J].中国电机工程学报,2001,21(10):78-82. |
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| 作者姓名： | 贾清泉 刘连光 杨以涵 宋家华 |
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| 作者单位： | 1. 华北电力大学电力系,
2. 东北电力学院, |
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| 摘 要： | 提出了一种配电网单相接地小电流故障选线保护新方法。该方法应用小波奇异性检测功能，获取故障引起的电压、电流突变量的极性和大小，达到选线目的。用该方法进行选线不受故障瞬间电压相角以及消弧线圈的影响，通用性强，而且对干扰的容忍能力也有提高，EMTP仿真和现场试验对该方法进行的验证表明，该方法能满足实用要求。
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| 关 键 词： | 配电网 小电流接地 故障 选线保护 小波 检测 故障突变特性 |
| 文章编号： | 0258-8013(2001)10-0078-05 |
| 修稿时间： | 2000年11月3日 |
ABRUPT CHANGE DETECTION WITH WAVELET FOR SMALL CURRENT FAULT RELAYING |
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| JIA Qing-quan ,LIU Lian-guang ,YANG Yi-han ,SONG Jia-hua.ABRUPT CHANGE DETECTION WITH WAVELET FOR SMALL CURRENT FAULT RELAYING[J].Proceedings of the CSEE,2001,21(10):78-82. |
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| Authors: | JIA Qing-quan LIU Lian-guang YANG Yi-han SONG Jia-hua |
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| Affiliation: | JIA Qing-quan 1,LIU Lian-guang 1,YANG Yi-han 1,SONG Jia-hua 2 |
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| Abstract: | A novel method for single-phase-to-ground fault relaying is presented in this paper. In this method, singularity detection with wavelet is employed to obtain the polarities and magnitudes of the abrupt change of voltage and current caused by the fault, and through comparing the polarities and magnitudes the fault circuit can be determined. This method is not only immune from the moment when a fault occurs and the condition whether a Peterson coil exists or not, but also more bearable to interference. EMTP simulations and field tests verified the effectiveness and practice of the proposed method. |
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| Keywords: | small current fault fault circuit selection wavelet singular detection |
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