基于护层电流构建新型判据的高压输电电缆在线监测

doi:10.11930/j.issn.1004-9649.202103052

中国电力 ›› 2021, Vol. 54 ›› Issue (9): 45-54,118.DOI: 10.11930/j.issn.1004-9649.202103052

基于护层电流构建新型判据的高压输电电缆在线监测

周欣¹, 夏向阳¹, 夏君山², 陈善求², 张育粱¹, 杨隆凯¹, 罗彦鹏¹, 王瑞琪¹, 刘雄¹

1. 长沙理工大学电气与信息工程学院，湖南长沙 410114;
2. 金杯电工股份有限公司，湖南长沙 410007

收稿日期:2021-03-08 修回日期:2021-05-20 发布日期:2021-09-14
作者简介:周欣(1997-),男,硕士研究生,从事电力设备故障与诊断研究,E-mail:229811549@qq.com;夏向阳(1968-),男,通信作者,教授,博士生导师,从事电力电子技术及其应用研究,E-mail:307351045@qq.com
基金资助:
国家自然科学基金资助项目(柔性直流输电交流侧故障下换流器多桥臂主动应对的能量调控机理及穿越控制研究, 51977014)；长沙市科技计划资助项目(输变电电缆故障在线监测与识别, kq2004074)

On-Line Monitoring of HV Transmission Cables Based on A New Criterion Established with Sheath Current

ZHOU Xin¹, XIA Xiangyang¹, XIA Junshan², CHEN Shanqiu², ZHANG Yuliang¹, YANG Longkai¹, LUO Yanpeng¹, WANG Ruiqi¹, LIU Xiong¹

1. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China;
2. Goldcup Electric Apparatus Co., Ltd., Changsha 410007, China

Received:2021-03-08 Revised:2021-05-20 Published:2021-09-14
Supported by:
This work is supported by National Natural Science Foundation of China (Research on Energy Regulation Mechanism and Fault Ride-Through Control of Multi-Armed Converter of AC Side Fault in MMC-HVDC System, No.51977014), and Changsha Science and Technology Plan Project (No.kq2004074)

摘要/Abstract

摘要： 为及时发现高压电缆交叉互联接地系统中的故障问题，基于电缆金属护层首末两端的接地电流，构造了一种新型判据来实现电缆故障的分类与定位。该方法通过测量电缆交叉互联主段首末两端直接接地箱中金属护层接地电流的幅值与相位，并以同一金属护层回路首末两端接地电流幅值与相位的比值、以不同金属护层回路首末两端接地电流相位差的绝对值构造新的特征量，根据多维特征融合建立故障判据对应的特征量矩阵，以此进行故障诊断。分析了电缆中间接头开路、交叉互联接地箱进水和中间接头短路等常见的电缆故障，并通过仿真验证了新型故障判据的可行性，为高压电缆线路故障的在线监测提供了新的方法。

关键词: 高压电缆, 交叉互联, 金属护层, 接地电流, 故障分类

Abstract: In order to timely discover the faults in the high-voltage cable cross-interconnected grounding system, this paper constructs a new criterion based on the ground currents at both ends of the metal sheath of cable to classify and locate the faults of power cables. Firstly, the amplitude and phase of grounding current of metal sheath in direct-grounding boxes at both ends of the main section of cable cross-interconnection are measured; and then a new characteristic quantity is constructed using the amplitude ratio and phase ratio of grounding current at both ends of the same metal sheath circuit and the absolute value of phase difference of grounding current at both ends of different metal sheath circuits; and finally a characteristic quantity matrix corresponding to fault criteria is established to identify the faults based on multi-dimensional characteristic fusion. The common cable faults, such as the open circuit of the cable intermediate joints, the water infiltration into the cross-interconnection grounding box, and the short circuit of the cable intermediate joints, are analyzed, and the feasibility of the new fault criterion is verified by simulation, which can provide a new method for on-line monitoring of high-voltage cable faults.

Key words: high voltage cable, cross-interconnection, metal sheath, ground current, fault classification

周欣, 夏向阳, 夏君山, 陈善求, 张育粱, 杨隆凯, 罗彦鹏, 王瑞琪, 刘雄. 基于护层电流构建新型判据的高压输电电缆在线监测[J]. 中国电力, 2021, 54(9): 45-54,118.

ZHOU Xin, XIA Xiangyang, XIA Junshan, CHEN Shanqiu, ZHANG Yuliang, YANG Longkai, LUO Yanpeng, WANG Ruiqi, LIU Xiong. On-Line Monitoring of HV Transmission Cables Based on A New Criterion Established with Sheath Current[J]. Electric Power, 2021, 54(9): 45-54,118.

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https://www.electricpower.com.cn/CN/Y2021/V54/I9/45

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基于护层电流构建新型判据的高压输电电缆在线监测

On-Line Monitoring of HV Transmission Cables Based on A New Criterion Established with Sheath Current

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基于护层电流构建新型判据的高压输电电缆在线监测

On-Line Monitoring of HV Transmission Cables Based on A New Criterion Established with Sheath Current

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