| 采用形态学峰谷检测的谐振接地系统故障选线方法 |
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| 引用本文： | 束洪春,黄海燕,田鑫萃,董俊,黄然. 采用形态学峰谷检测的谐振接地系统故障选线方法[J]. 电力系统自动化, 2019, 43(1): 228-233 |
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| 作者姓名： | 束洪春 黄海燕 田鑫萃 董俊 黄然 |
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| 作者单位： | 昆明理工大学电力工程学院,云南省昆明市,650500;哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市,150001;云南电网有限责任公司电力科学研究院,云南省昆明市,650217 |
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| 基金项目： | 国家自然科学基金资助项目(51667010) |
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| 摘 要： | 谐振接地系统发生单相接地故障时暂态量十分丰富。文中对各线路发生故障后1/4周期零序电流的短窗数据进行小波变换，剔除工频所在频带，按能量和最大的原则选取特征频带，并对特征频带下重构的小波系数进行形态学峰谷检测。故障线路零序电流首波头峰谷形态与各线路零序电流首波头整体的峰谷形态相反，据此构成故障选线判据。仿真分析和实录数据验证均表明所提方法选线准确、可靠性高。
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| 关 键 词： | 谐振接地系统 故障选线 暂态分量 峰谷检测 数学形态学 特征频带 |
| 收稿时间： | 2018-05-06 |
| 修稿时间： | 2018-11-30 |
Fault Line Selection in Resonant Earthed System Based on Morphological Peak-Valley Detection |
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| SHU Hongchun,HUANG Haiyan,TIAN Xincui,DONG Jun and HUANG Ran. Fault Line Selection in Resonant Earthed System Based on Morphological Peak-Valley Detection[J]. Automation of Electric Power Systems, 2019, 43(1): 228-233 |
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| Authors: | SHU Hongchun HUANG Haiyan TIAN Xincui DONG Jun HUANG Ran |
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| Affiliation: | Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China,Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China,Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China,School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China and Power Science Research Institute of Yunnan Power Grid Co. Ltd., Kunming 650217, China |
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| Abstract: | Transient electrical quantity information is very abundant when single-phase grounding fault occurs in resonant earthed system. The short window data of 1/4 period of zero sequence current fault of each line are transformed by wavelet transform. The frequency band of power frequency is eliminated and the feature frequency band is selected according to the principle of maximum energy sum. The reconstructed wavelet coefficients under the feature frequency band are checked by morphological peak-valley detection. The peak-valley characteristic of the fault feeder is opposite to that of the total feeders, which is used as the fault line selection criterion. The simulation analysis and practical verification demonstrate the feasibility and effectivity of this method. |
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| Keywords: | resonant earthed system fault line selection transient component peak-valley detection mathematical morphology feature band |
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