摘要
为研究高压交联聚乙烯电缆附件存在缺陷时的局部放电现象,制作了接头与电缆界面存在气隙、本体外屏蔽层存在导电尖端、接头内表面划伤、接头外表面破损、终端应力锥错位及终端内部存在导电微粒6种典型缺陷模型,分别对其进行了高频局部放电带电检测,对比分析了放电起始电压与PRPD(局部放电相位分离)谱图。结果表明,各典型缺陷模型的放电起始电压、放电量特性等均存在明显区别,为局部放电模式识别研究提供参考。
In order for study of partial discharge in the case of high-voltage XLPE cable accessory defect,six typical defect samples were manufactured,such as air gap between joint and cable,external shield tip,internal surface scratch and external surface breakage at joint,stress cone malposition at terminal and conductive particles in terminal.The high-frequency partial discharge tests were performed.The initial discharge voltages and PRPD(phase resolved partial discharge)diagrams were analyzed and compared.The result shows that there are significant differences in initial discharge voltage,discharge quantity characteristic of typical fault models,which provides a reference for partial discharge mode recognition.
作者
李乃一
曹俊平
王少华
杨勇
周路遥
金涌涛
LI Naiyi;CAO Junping;WANG Shaohua;YANG Yong;ZHOU Luyao;JIN Yongtao(State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China)
出处
《浙江电力》
2019年第1期58-63,共6页
Zhejiang Electric Power
基金
国网浙江省电力有限公司科技项目(5211DS15002B)
关键词
电缆附件
缺陷
局部放电
高频电流传感器
cable accessory
defects
partial discharge
high-frequency current transformer
