摘要
高频局放带电检测是预先发现110kV及以上高压电缆线路本体或屏蔽层运行缺陷的有效手段之一。针对高压电缆线路屏蔽层局放检测易受外界环境干扰且信号定位缺乏有效经验问题,采用长2m、截面积为400mm^2的9根110kV电缆搭建一交叉互联接地形式的电缆线路局放检测试验平台,并用信号发生器模拟局放源;利用该试验平台,分别对设置于电缆屏蔽层接地线不同位置的局放信号进行检测,并根据检测到的信号幅值和波形特征判断屏蔽层局放源位置及其传播路径。试验过程及其结果为1条实际在运的110kV电缆线路高频局放检测异常信号的分析提供了参考。
High frequency partial discharge live detection is one of the effective means to detect the running defects of 110 kV and above cable lines in advance.Aiming at the problem of high frequency partial discharge detection for high voltage cable shielding layer was vulnerable to external environment interference and lacking of effective experiences in positioning the defects,110 kV cables of the number of nine which the each length was 2 m and the sectional area was 400 mm^2 were used to build a test platform of cross-connected grounding type cable lines for high frequency partial discharge detecting,and the signal generator was used to simulate the source of partial discharge.The test platform was used to detect partial discharge signals which the source was set at different positions of cable shielding layer grounding lines.The signal’s amplitude and waveform characteristics were analyzed to judge the partial discharge source position of shielding layer and its propagation path.The test process and its results provided a reference for the analysis of abnormal signals detected by high frequency partial discharge detection of a 110 kV cable line in operation.
作者
伍弘
郝金鹏
杨凯
李奇超
WU Hong;HAO Jinpeng;YANG Kai;LI Qichao(Power Research Institute of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750011,China)
出处
《宁夏电力》
2020年第5期39-45,共7页
Ningxia Electric Power
关键词
高压电缆
屏蔽层
高频局放检测
试验平台
信号发生器
high voltage power cable
shielding layer
high frequency partial discharge detection
test platform
signal generator
