10kV电缆局部放电的振荡波电压法检测  

The Partial Discharge Diagnosis of 10kV Cables by Using Oscillating Wave Voltage Method

作　　者：陆国俊 熊俊 

机构地区：[1]广州供电局有限公司电力试验研究院,广州510410

出　　处：《南方电网技术》2013年第4期34-38,共5页Southern Power System Technology

基　　金：中国南方电网有限责任公司科技项目(K-GZM2013-023);广东电网公司科技项目(DK0010GZ0006)~~

摘　　要：介绍了振荡波电压法检测电缆局部放电状态的基本原理、技术参数、主要测试步骤。利用电缆振荡波局部放电测试系统对一段长294 m的10 kV XLPE电缆进行了局部放电测试。测试中发现了电缆中间的接头部位存在局部放电现象,经解体检查发现该接头内部受潮和热缩管收缩不均匀,导致与主绝缘界面存在气隙,估计该接头可能是造成该电缆局部放电的主要原因;在更换该中间接头后,复测结果正常。检测结果验证了该项技术的有效性。Introducing the basic theory, technical parameters amd main test procedures of oscillating wave test system （OWTS）, this paper makes an insulation diagnosis of a 10 kV 294 m cable with one joint by using oscillating wave voltage method, founding that there is partial discharge in the joint, as well as a disintegration of the joint, founding that there is air bubble in the main insulation interface of the joint due to its damping and the uneven shrinking of heat shrink tubing, and thus proposes that the joint may be the main cause of the partial discharge. After replacement of the joint, the result of again diagnosis of the cable is good. It proves that the proposed diagnosis technology is effective.

关 键 词：配电网 电缆 振荡波电压法 局部放电 

分 类 号：TM855.2[电气工程—高电压与绝缘技术]