| 基于改进HHT方法的井下单相漏电选择性保护研究 |
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| 引用本文： | 谢子殿,袁延忠.基于改进HHT方法的井下单相漏电选择性保护研究[J].黑龙江电力,2014(1):1-4. |
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| 作者姓名： | 谢子殿 袁延忠 |
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| 作者单位： | 黑龙江科技大学电气与控制工程学院,哈尔滨150022 |
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| 摘 要： | 针对常用中性点不接地单相漏电保护故障选线方法中存在的缺陷,提出一种基于改进HHT法的故障线路选线法.根据信号内部及边界的波形特征,利用原始信号产生子波形,再用相似波型加权匹配法对端点效应进行拓延,使EMD分解得到的包络曲线端点处包含了所有原始信号的信息,消除了端点效应的影响.仿真结果表明,改进的HHT方法不仅有效抑制了端点效应,而且提高了故障支路的判断准确性.
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| 关 键 词： | HHT 经验模态分解 端点效应 相似波形加权匹配 故障支路 |
Research on underground single-phase leakage selective protection based on improved HHT method |
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| XIE Zidian,YUAN Yanzhong.Research on underground single-phase leakage selective protection based on improved HHT method[J].Heilongjiang Electric Power,2014(1):1-4. |
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| Authors: | XIE Zidian YUAN Yanzhong |
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| Affiliation: | (School of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China) |
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| Abstract: | Aiming at the defects of isolated neutral single-phase leakage selective protection, this paper proposes a new fault line selection method based on HHT, a method which extends the end effect by weighted similar waveform matching according to the characteristics of waveform of signal inner and boundary and the minor waveform genera- ted by the original signal, and enables the envelope curve end got by EMD to have all the information of original sig- nal so as to eliminate the influence of end effect. The simulation result shows that the improved HHT method not on- ly restrains end effect but enhance the accuracy of fault branch diagnosis |
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| Keywords: | Hilbert-Huang Transform （HHT） Empirical Mode Decomposition end effect weighted similar wave- form matching fault branch |
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