基于时频域行波全景波形的配电网故障选线方法

doi:10.19595/j.cnki.1000-6753.tces.200649

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Abstract In order to improve the accuracy and reliability of single-phase grounding fault feeder selection in distribution network, a fault line selection method based on traveling wave panoramic waveform in time-frequency domain is proposed. First, the S-transform is used to extract the time-frequency traveling wave panoramic waveform of each line, which can display truly the characteristics of the fault traveling. The difference of amplitude, frequency and polarity of traveling wave between faulty line and healthy line is analyzed in detail. Then, based on the principle of waveform similarity, the traveling wave panoramic waveform of faulty line and healthy lines are analyzed quantitatively, and a similarity degree coefficient matrix is constructed for each line. By calculating the sum of the correlation coefficients of each line, the difference of the panoramic waveform is amplified, and the accurate distribution network line selection is realized. The proposed faulty line selection method does not need to set the threshold manually. A large number of simulation results show that the method has high algorithm adaptability. Under 3kΩ high-resistance ground fault, it can still achieve sensitively faulty feeder selection in distribution network.

Key words： Distribution network Distribution network fault feeder selection fault feeder selection single phase to ground fault single phase to ground fault traveling wave panoramic waveform traveling wave panoramic waveform principle of similarity degree principle of similarity degree

Received: 12 June 2020

PACS:

TM862

Fund:国家自然科学基金（52077008,51977013,51877012）、湖南省自然科学基金青年项目（2019JJ50660）、湖南省教育厅优秀青年项目（18B134）和长沙理工大学专业硕士研究生“实践创新与创业能力提升计划”（SJCX201949）资助

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	Articles by authors
	Mei Longjun
	Deng Feng
	Tang Xin
	Mei Longjun
	Xu Fan
	Tang Xin
	Zeng Xiangjun
	Xu Fan
	Zeng Xiangjun

Cite this article:

Mei Longjun,Deng Feng,Tang Xin等. Faulty Line Selection Method of Distribution Network Based on Time-Frequency Traveling Wave Panoramic Waveform[J]. Transactions of China Electrotechnical Society, 2021, 36(13): 2861-2870.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200649 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I13/2861

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