[1]夏君山,夏向阳,赵 威,等.基于差值电流分析的高压电缆在线监测研究[J].高压电器,2019,55(07):165-172.[doi:10.13296/j.1001-1609.hva.2019.07.024]
 XIA Junshan,XIA Xiangyang,ZHAO Wei,et al.Research on Online Monitoring for HV Cable Based on Differential Current Analysis[J].High Voltage Apparatus,2019,55(07):165-172.[doi:10.13296/j.1001-1609.hva.2019.07.024]
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基于差值电流分析的高压电缆在线监测研究()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年07期
页码:
165-172
栏目:
研究与分析
出版日期:
2019-07-15

文章信息/Info

Title:
Research on Online Monitoring for HV Cable Based on Differential Current Analysis
作者:
夏君山1 夏向阳2 赵 威2 李明德3 黄 海3 陈善求1
(1. 金杯电工股份有限公司, 长沙 410007; 2. 长沙理工大学电气与信息工程学院, 长沙 410114; 3. 衡阳市产商品质量 监督检验所, 湖南 衡阳 421000)
Author(s):
XIA Junshan1 XIA Xiangyang1 ZHAO Wei2 LI Mingde3 HUANG Hai3 CHEN Shanqiu1
(1. Goldcup Electric Apparatus Co.,Ltd., Changsha 410007, China; 2. College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410114, China; 3. Hengyang City Commodity Quality Supervision and Inspection, Hunan Hengyang 421000, China)
关键词:
高压电缆 接地线电流 比值分析 不平衡度 在线监测
Keywords:
HV cable ground line current ratio analysis unbalance factor online monitoring
DOI:
10.13296/j.1001-1609.hva.2019.07.024
摘要:
针对当前高压电缆故障单一参数监测判断准确度低,多参数监测存在数据融合分析不足等问题,提出一种基于差值电流分析的高压电缆故障在线监测方法。该方法通过测量直接接地箱和交叉互联接地箱处接地线电流,对故障及正常情况下接地线三相电流进行比值分析和不平衡度分析来识别故障,根据模糊控制原理建立了故障判别依据和相关数据库,以此进行故障诊断。分析了故障情况下接地箱电流变化情况并仿真模拟了不同位置的接地箱进水、同轴电缆破损、接头开路、接头短路等故障。最后以此设计出一套高压电缆线路故障在线监测系统。通过实例分析验证了该方法的可行性,能及时预警高压电缆线路故障,防止高压电缆线路发生安全事故。
Abstract:
Since single-parameter monitoring of power cable sheath fault cannot be evaluated fault accurately and multi-parameter fault monitoring is not enough for data fusion analysis, an on-line cable faults method based on differential current analysis is proposed to precautions for early failures of high-voltage cable lines. This method measures grounding current at the direct grounding box and the cross-connected grounding box and calculate the fault and normal conditions of the grounding wire three-phase current for ratio analysis and unbalance to identify the fault. The fault criteria and fault database are established by fuzzy control based on the change of character parameter such as eccentricity, and inclination angle of the locus. The faults such as grounding box water inlet, coaxial cable broken, joint open circuit, joint short circuit in different locations are simulated. A set of cable insulation on-line monitoring system is designed and simulated at laboratory which includes the front-end signal acquisition unit, micro-controller master unit, as well as background data analysis and processing unit. The actual monitoring results show that the cable online monitoring system based on this method can truly reflect the insulation characteristics of the cable.

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备注/Memo

备注/Memo:
夏君山(1967—),男,硕士,教授级高工,主要从事电缆设计与制造工作。 夏向阳(1968—),男,博士,教授,主要研究方向为电力电子技术在电力系统中的应用和电力电缆故障诊断。 赵 威(1995—),男,硕士生,研究方向为电力系统运行与控制(通讯作者)。收稿日期:2018-11-18; 修回日期:2019-01-10 基金项目:国家自然科学基金资助项目(51307009);湖南省自然科学衡阳联合基金(2018JJ4025)。 Project Supported by National Natural Science Foundation of China(51307009),Hunan Natural Science Hengyang Joint Fund(2018JJ4025).
更新日期/Last Update: 2019-07-15