35kV电缆终端电压致热型缺陷分析与诊断  

Analysis and Diagnosis of Voltage-induced Thermal Defectsin 35 kV Cable Terminal

作　　者：张苗苗 竺笠 阚永明 吕跃[1] 华健 ZHANG Miaomiao;ZHU Li;KAN Yongming;LV Yue;HUA Jian(State Grid Tianjin Electric Power Cable Company,Tianjin 300000,China)

机构地区：[1]国网天津市电力公司电缆分公司,天津300000

出　　处：《河北电力技术》2023年第1期71-75,共5页Hebei Electric Power

基　　金：国家自然科学基金项目(51707133)。

摘　　要：介绍35 kV三芯电缆单相终端结构及电场情况,结合利用红外检测技术发现的35 kV电缆终端电压致热型缺陷典型案例,分析电缆终端电压致热型缺陷的主要原因以及电缆终端表面相间温差与缺陷严重程度的正相关性,提出电压致热型缺陷检修与防范建议,为超前预防电缆线路隐患、降低非计划停电率提供参考。This paper introduces the single phase terminal structure and electric field of 35 kV three-core cable,analyzes the main causes of the voltage induced thermal defects of the cable terminal and the positive correlation between the phase to-phase temperature difference on the surface of the cable terminal and the severity of the defect,combining with the typical case of the voltage-induced thermal defects of the 35 kV cable terminal discovered by the infrared detection technology,and puts forward the maintenance and prevention suggestions of the voltage thermal defects.It provides reference for preventing the hidden dan-ger of the cable line in advance and reducing unplanned outage rate.

关 键 词：电缆终端 红外热成像 绝缘管 电压致热型缺陷 

分 类 号：TM75[电气工程—电力系统及自动化]