低温环境下不同车载电缆终端结构的局部放电试验研究  

Partial Discharge Test Research on Different Structures of Vehicle Cable Terminal in Low Temperature Environment

作　　者：王伟敏 陈群静 周利军[2] 薛长征 任小龙[3] WANG Weimin;CHEN Qunjing;ZHOU Lijun;XUE Changzheng;REN Xiaolong(Power Maintenance Branch of State Grid Fujian Electric Power Company,Fuzhou 350013,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Guilin Electrical Equipment Scientific Research Institute,Guilin 541004,China)

机构地区：[1]福建省电力有限公司检修分公司,福建福州350013 [2]西南交通大学电气工程学院,四川成都610031 [3]桂林电器科学研究院有限公司,广西桂林541004

出　　处：《绝缘材料》2020年第12期97-102,共6页Insulating Materials

摘　　要：通过建立低温局部放电测试系统,分别在常温与低温下分析了两种不同车载电缆终端结构的局部放电分布情况。结果表明:在低温环境下,含有应力管的电缆终端比含有应力锥的电缆终端更容易产生绝缘空隙,导致应力管不能有效改善电缆终端屏蔽断口处的电场分布,使电缆终端发生放电发热击穿;相比于含有应力锥的电缆终端,低温环境对含有应力管的电缆终端局部放电的影响更加明显。因此,在低温环境下,含有应力锥的电缆终端性能优于含有应力管的电缆终端。A low-temperature partial discharge test system was constructed,and the partial discharge distributions of two different vehicle cable terminal structures were analyzed at room temperature and low temperature,re-spectively.The results show that in low temperature environment,the cable terminal with stress tube is more likely to produce insulating voids than the cable terminal with stress cone,which results in that the stress tube cannot improve the electric field distribution at the shielding fracture of cable terminal effectively,making the cable terminal produce discharge,heat,and breakdown.The effect of low-temperature environment on the partial discharge produced by cable terminal with stress tube is more obvious than that produced by cable terminal with stress cone.Therefore,in low temperature environment,the performance of the cable terminal with stress cone is better than that of the cable terminal with stress tube.

关 键 词：低温 常温 应力管 局部放电 

分 类 号：TM246[一般工业技术—材料科学与工程]