基于能量比值分析的直流输电线路故障判别

doi:10.11930/j.issn.1004-9649.201912142

中国电力 ›› 2020, Vol. 53 ›› Issue (8): 85-90,99.DOI: 10.11930/j.issn.1004-9649.201912142

基于能量比值分析的直流输电线路故障判别

朱鹏¹, 夏向阳¹, 李明德², 雷云飞³, 夏立³, 周正雄¹, 黄海², 尹鹏¹, 罗彦鹏¹, 厉广城¹

1. 长沙理工大学电气与信息工程学院，湖南长沙 410114;
2. 湖南电线电缆产品质量监督检验中心，湖南衡阳 421001;
3. 国网湖南省电力有限公司检修公司，湖南长沙 410000

收稿日期:2019-12-25 修回日期:2020-03-16 发布日期:2020-08-05
作者简介:朱鹏(1996-),男,硕士研究生,从事电力设备故障诊断研究,E-mail:1982331923@qq.com;夏向阳(1968-),男,通信作者,教授,博士生导师,从事高压直流输电系统控制与保护技术等研究,E-mail:307351045@qq.com
基金资助:
国家自然科学基金资助项目(51977014)

Fault Identification of DC Transmission Lines Based on Energy Ratio Analysis

ZHU Peng¹, XIA Xiangyang¹, LI Mingde², LEI Yunfei³, XIA Li³, ZHOU Zhengxiong¹, HUANG Hai², YIN Peng¹, LUO Yanpeng¹, LI Guangcheng¹

1. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China;
2. Hunan Wire and Cable Product Quality Supervision and Inspection Center,Hengyang 421001, China;
3. Maintenance Company of State Grid Hunan Electric Power Co., Ltd., Changsha 410000, China

Received:2019-12-25 Revised:2020-03-16 Published:2020-08-05
Supported by:
This work is supported by the National Natural Science Foundation of China (No.51977014)

摘要/Abstract

摘要： 针对高压直流输电线路跨域广，遭受雷击概率较高，易引起输电线路故障的问题，提出了一种基于能量比值分析的故障识别方法。在考虑发生雷击故障或接地故障时，引起输电线路暂态能量发生改变，且雷击时的故障能量与接地故障时的故障能量不同的特征，通过从能量的角度出发，提出了利用S变换将输电线路各频带的能量进行分离，提取出特定频带的能量进行比值分析。基于EMTP/PSCAD搭建220 kV高压直流输电线路模型，仿真结果表明其方案可以很好地识别雷击故障和接地短路故障。

关键词: 直流输电线路, 雷击故障, 接地故障, S变换, 能量比值

Abstract: HVDC transmission lines, being long in distance and crossing complex natural environments, are prone to lightning and short to ground faults. Aiming at this problem, a novel fault identification method is proposed based on energy ratio. Considering the transient energy variation of transmission lines caused by lightning faults or short to ground faults, and the difference of fault energy characteristics between lightning fault and grounding fault, it is proposed from the perspective of energy to use the S-transformation to separate the energy of each frequency band of the transmission line, and to extract the energy of a specific frequency band for ratio analysis. A 220 kV HVDC transmission line model is constructed using EMTP/PSCAD, and the simulation results show that the proposed method can well identify the lightning faults and short-to-ground faults.

Key words: DC transmission line, lightning fault, grounding fault, S-transform, energy ratio

朱鹏, 夏向阳, 李明德, 雷云飞, 夏立, 周正雄, 黄海, 尹鹏, 罗彦鹏, 厉广城. 基于能量比值分析的直流输电线路故障判别[J]. 中国电力, 2020, 53(8): 85-90,99.

ZHU Peng, XIA Xiangyang, LI Mingde, LEI Yunfei, XIA Li, ZHOU Zhengxiong, HUANG Hai, YIN Peng, LUO Yanpeng, LI Guangcheng. Fault Identification of DC Transmission Lines Based on Energy Ratio Analysis[J]. Electric Power, 2020, 53(8): 85-90,99.

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https://www.electricpower.com.cn/CN/Y2020/V53/I8/85

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基于能量比值分析的直流输电线路故障判别

Fault Identification of DC Transmission Lines Based on Energy Ratio Analysis

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基于能量比值分析的直流输电线路故障判别

Fault Identification of DC Transmission Lines Based on Energy Ratio Analysis

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