局部放电信号传播特性在电缆局部放电测试中的应用  

Application of Partial Discharge Propagation Characteristics in Partial Discharge Test of Cables

作　　者：陈腾彪 邬韬 詹威鹏 覃延佳 冯晓棕 欧阳建军 

机构地区：[1]深圳供电局有限公司输电部,广东深圳518000 [2]广州友智电气技术有限公司,广东广州510260

出　　处：《广东电力》2012年第7期96-100,共5页Guangdong Electric Power

摘　　要：就深圳供电局某110 kV电缆线路2号中间接头进行局部放电检测时发现的疑似局部放电(partial dis-charge,PD)信号展开跟踪测试和分析。测试采用了脉冲电流的测试方法,首先通过2号中间接头所检测到的疑似PD信号进行频率特征及其发射波(回波)特点的分析,之后对全线路的各个中间接头测试和分析,最终通过分布在全线路各点的同一信号的传播衰减特征,确认疑似PD信号来自EB-A终端架空线电晕放电。该方法可及时发现电力电缆线路潜在缺陷隐患,保障线路安全可靠运行。The tracking test and analysis of apparent partial discharge （PD） signal during PD test of 2nd intermediate terminal of 110 kV cable line of Shenzhen Power Supply Bureau are conducted. Pulse current test method is adopted： apparent PD signal of 2nd intermediate terminal is analyzed in terms of frequency characteristic and transmitted wave （echo signal）, and afterwards all the intermediate terminals in the entire cable are tested and analyzed. Finally, it is determined that the apparent signal results from corona discharge of overhead lines of EB-A terminal in accordance to propagation attenuation of the same signal on each point of the entire cable. This method can effectively help discover potential hazards of power cables so as to assure safe and stable operation of power lines.

关 键 词：电缆线路 中间接头 疑似PD信号 传播衰减 

分 类 号：TM247[一般工业技术—材料科学与工程] TM855[电气工程—电工理论与新技术]