10 kV交联聚乙烯电缆振荡波局部放电检测技术等效性研究

Study on Equivalence of Oscillating Wave Voltage Partial Discharge Detection of 10 kV XLPECable

为了探究振荡波局部放电检测方法的有效性和等效性问题,在实验室设计了针板放电模型、沿面放电模型、气隙放电模型、悬浮放电模型4种模型,并分别进行了振荡波电压下和工频交流电压下的局部放电试验,最后对河北沧州10 kV狮场Ⅰ线、Ⅱ线2条电缆线路进行了振荡波局部放电的现场检测试验。试验结果表明,振荡波局部放电检测技术有良好的局部放电检测能力,与工频下局部放电检测有良好的等效性,可用于替代电力电缆的工频局放试验。

In order to explore the validity and equivalence of the oscillating wave voltage test method,four different discharge model were designed in the laboratory,which is needle plate discharge model,surface discharge model,air gap discharge model and suspended discharge model. Partial discharge tests were carried out by oscillating wave voltage and AC voltage,respectively. In the end,the field test of the partial discharge of the oscillating wave was carried out on the 10 kV XLPE cabels of Ⅰ line and Ⅱ line in Cangzhou Hebei. The experimental results show that the partial discharge detection technology has a good partial discharge detection ability,and the partial discharge detection has a good equivalent,can be used to replace the power cable power cable. At the same time,the OWTS partial discharge detection system has the advantages of small size,light weight,convenient portability,compression time is short,the advantages of cable two damage is small,can be widely used in power cable insulation condition detection.