| 行波故障定位中小波基的选择 |
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| 引用本文： | 黄子俊,陈允平. 行波故障定位中小波基的选择[J]. 电力系统自动化, 2006, 30(3): 61-64,104 |
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| 作者姓名： | 黄子俊 陈允平 |
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| 作者单位： | 1. 空军雷达学院,湖北省武汉市,430010
2. 武汉大学电气工程学院,湖北省武汉市,430072 |
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| 摘 要： | 在分析行渡信号奇异性的性质和小波基特征的基础上，提出了奇异信号检测中小渡基的选择原则，针对行波信号中出现的2种不同类型的奇异信号分别选出合适的小波基。对于突变奇异信号，使用Gaussl小波能取得较好的检测与定位效果；对于缓变奇异信号，则应选择消失矩为2的Mexican Hat小波。EMTP仿真实验结果表明所选择的小波基具有很强的检测能力和检测精度。
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| 关 键 词： | 故障定位 行波 奇异信号 小波基 |
| 收稿时间： | 2005-08-24 |
| 修稿时间： | 2005-08-24 |
Selection of Wavelet Bases for Traveling Wave Fault Location |
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| HUANG Zi-jun,CHEN Yun-ping. Selection of Wavelet Bases for Traveling Wave Fault Location[J]. Automation of Electric Power Systems, 2006, 30(3): 61-64,104 |
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| Authors: | HUANG Zi-jun CHEN Yun-ping |
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| Affiliation: | 1. Air Force Radar Academy, Wuhan 430010, China; 2. Wuhan University, Wuhan 430072, China |
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| Abstract: | This paper proposes the selection principles of wavelet bases for singularity detection on the base of analyzing the singularities of traveling wave signal and the characteristics of wavelet bases. The wavelet bases applied to two sorts of traveling wave signals that have different singularity are selected. Gaussl wavelet is suitable for the detection of an abruptly changing singularity signal. Mexican Hat wavelet, whose vanishing moment is 2, is suitable for the detection of a slowly changing singularity signal. Simulations using EMTP verify the detecting validity and accuracy of the selected wavelet bases. |
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| Keywords: | fault location traveling wave singularity signal wavelet base |
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