基于形态学的特高压直流输电线路雷击干扰识别

doi:10.11930/j.issn.1004-9649.2014.10.40.6

中国电力 ›› 2014, Vol. 47 ›› Issue (10): 40-46.DOI: 10.11930/j.issn.1004-9649.2014.10.40.6

• 电网—特高压直流输电专栏 • 上一篇下一篇

基于形态学的特高压直流输电线路雷击干扰识别

陈仕龙, 曹蕊蕊, 毕贵红, 李兴旺, 荣俊香

昆明理工大学电力工程学院,云南昆明 650500

收稿日期:2014-04-15 出版日期:2014-10-18 发布日期:2015-12-10
作者简介:陈仕龙（1973—）,男,四川汉源人,博士,副教授,从事高压直流输电方面的研究。E-mail: chenshilong3@126.com
基金资助:
国家自然科学基金资助项目（51267008）

Identification of UHVDC Transmission Line Lightning Disturbance Based on Morphology

CHEN Shi-long, CAO Rui-rui, BI Gui-hong, LI Xing-wang, RONG Jun-xiang

School of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China

Received:2014-04-15 Online:2014-10-18 Published:2015-12-10
Supported by:
This work is supported by National Natural Science Foundation of China (51267008)

摘要/Abstract

摘要： 研究和识别输电线路雷击干扰的暂态特征对研制基于暂态量的保护及提高其可靠性具有十分重要的意义。数学形态学多尺度形态分解可以将复杂信号分解为具有物理意义的各部分,并且能凸显波形的局部特征。基于此,运用数学形态学对±800 kV特高压直流输电线路的雷击未故障、雷击故障和其他原因接地故障的暂态电流进行多尺度分解,提取高、低频段上的谱能量,并用这2个谱能量的比值构成主判据,实现雷击干扰与故障状态的识别。根据电流首波头的第2尺度和第6尺度分解波形的电流幅值最大值的比,进一步判别是雷击故障还是其他原因接地故障。通过大量的仿真验证了该方法是正确和有效的。

关键词: 特高压直流输电线路, 雷击故障, 数学形态学, 谱能量, 主判据

Abstract: Study on the transient characteristics of the electric signal is significant to the development of transient-based protection and its reliability improvement when the overhead transmission lines are disturbed by the direct lightning stroke. The multi-scale decomposition of mathematical morphology can decompose the complex signal into different sections with physical significance, and highlight the local features of the waveform. The mathematical morphology is used to make a multi-scale decomposition of the transient currents resulted from the non-fault lightning stroke, fault lightning stroke and line short circuit of the ±800 kV UHVDC transmission lines. The spectrum energies from the high and low frequency bands are extracted respectively. According the ratio of the maximum amplitudes of the waveforms in the second scale to the sixth scale of the first head of the current, the fault lightning stroke and the line short circuit can be distinguished. Extensive simulations demonstrate that the approach is correct and effective.

Key words: UHVDC transmission lines, lightning fault, mathematical morphology, spectrum energy, main criterion

中图分类号:

TM721.1

陈仕龙, 曹蕊蕊, 毕贵红, 李兴旺, 荣俊香. 基于形态学的特高压直流输电线路雷击干扰识别[J]. 中国电力, 2014, 47(10): 40-46.

CHEN Shi-long, CAO Rui-rui, BI Gui-hong, LI Xing-wang, RONG Jun-xiang. Identification of UHVDC Transmission Line Lightning Disturbance Based on Morphology[J]. Electric Power, 2014, 47(10): 40-46.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2014.10.40.6

https://www.electricpower.com.cn/CN/Y2014/V47/I10/40

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基于形态学的特高压直流输电线路雷击干扰识别

Identification of UHVDC Transmission Line Lightning Disturbance Based on Morphology

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基于形态学的特高压直流输电线路雷击干扰识别

Identification of UHVDC Transmission Line Lightning Disturbance Based on Morphology

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