高电压技术2023，Vol.49Issue(12)：4929-4937,9.DOI:10.13336/j.1003-6520.hve.20230231
基于温度测量和气体分析的高压电缆缓冲层烧蚀故障检测技术
Detection Technology of Buffer Layer Ablation Failure in High Voltage Cables Based on Tem-perature Measurement and Gases Analysis
摘要
Abstract
The buffer layer ablation of high voltage cables is frequently reported in recent years,which threatens the safe operation of cable systems.As a result,a method is proposed for detecting the buffer layer ablation failure based on tem-perature measurement and gases analysis.The temperature rise was detected at the cable ablative site in laboratory,which was accompanied by the release of gas products,such as CH4,C2H6,C2H4,C2H2,CO,and CO2.The finite element simu-lation revealed that partial high temperature exceeding the initial decomposition temperature of the buffer layer could be induced by poor electrical contact in cables.Therefore,the ablative gas products were released by the thermal decomposi-tion of buffer layer.Subsequently,the above method was applied on the failure detection of practical cable lines in Beijing area.An abnormal temperature rise was found in a cable outer sheath and the gas components such as CH4,C2H6,C2H4 were detected.The buffer layer ablation failure was observed by cable disassembly,verifying the feasibility of this meth-od.Relevant results show that the technology based on temperature measurement and gases analysis can detect the buffer layer failure of high voltage cables and have prospects of wide application in the practical cable lines.关键词
高压电缆/缓冲层/烧蚀故障/温度测量/气体分析Key words
high voltage cables/buffer layer/ablation failure/temperature measurement/gases analysis引用本文复制引用
张浩然,高建,武康宁,李建英,李华春,任志刚..基于温度测量和气体分析的高压电缆缓冲层烧蚀故障检测技术[J].高电压技术,2023,49(12):4929-4937,9.基金项目
国家电网公司科技项目(5108-202218280A-2-353-XG).Project supported by Science and Technology Project of SGCC(5108-202218280A-2-353-XG). （5108-202218280A-2-353-XG）
