高压XLPE电缆中电树枝生长的局部放电检测  

The Partical Discharge Detection of Electric Branch in High Voltage XLPE Caldes

作　　者：孙国繁 陈建杰[1] 张世魁[1] 

机构地区：[1]山西省电力公司运城供电分公司,山西运城044000

出　　处：《电气开关》2011年第4期65-68,共4页Electric Switchgear

摘　　要：通过在线观测XLPE电缆切片中电树枝的生长过程,发现不同电压等级下的电树枝的生长及击穿特性各不相同,二次加压后丛林状电树枝生长速度加快,形状表现出枝状特征。分析电树枝生长过程各时期局部放电数据与电树枝生长程度对比,发现工频周期内的局部放电量之和及放电次数与丛林状电树枝生长长度的发展趋势较为一致,可以较好的反映电压等级较高的电缆中电树枝发展严重程度。By on-line observing growing process of the electric branches in XLPE cable sections,the growing and the breakdown characteristic which the electric branches under different voltage classes have been found are different.After secondary pressurization,the growing speed of the forest electric branches accelerate,the shape being branch characteristic.When we analyze the extent contrast of the partical charging data and the electric branche growing in the electric branch growing process,we find that the partical charging quantity sum and charging frequency are indentical with the forest electric branch growing length,which can better reflect the electric branch development degree in the cable of higher voltage classes.

关 键 词：XLPE电缆 电树枝 二次加压 局部放电 

分 类 号：TM93[电气工程—电力电子与电力传动]