一起基于特高频法的电缆局部放电带电检测与定位案例分析  

A Case Study of Cable Partial Discharge Live Detection and Location Based on UHF Method

作　　者：吴勇 袁军芳 严波[2] 王斌武 李忠群 

机构地区：[1]马钢股份有限公司能源管控中心,安徽马鞍山243000 [2]国网安徽省电力公司,安徽合肥230061 [3]武汉华威众科电力有限公司,湖北武汉430205

出　　处：《电线电缆》2017年第6期28-31,共4页Wire & Cable

摘　　要：在开展电缆局放测试研究时,将特高频电磁耦合技术应用到XLPE电缆的局部放电检测与定位中,信号采集采用电容式传感器从电缆本体上获取方式。测试中发现762-14线路B相电缆户外终端具有比较明显的局部放电信号,采用短距离时差定位分析法,判定局放信号来源于B相终端,对该相终端进行解体后发现应力锥内外表面和尾部具有明显的放电痕迹,验证了特高频电缆局放检测与定位技术的有效性。特高频技术在电缆局放检测和定位中的开展应用为电缆在线局放检测研究提供了一个新的方向。During the research of cable partial discharge （ PD） detection, ultra high frequency （ UHF） electromag-netic coupling technology is applied to the XLPE cable PD detection and location. Capacitive sensor is used to obtain the PD signal from the cable body. 762-14 line B-phase cable outdoor terminal was found to be more obvious PD sig-nal during the detection. The PD signal was determined from B-phase cable outdoor terminal by short distance time- delay localization analytical method. After the disassembly of the phase terminal, it was found that the inner and outer surfaces and the tail of the stress cone had obvious discharge traces. It is verified that the detection and location tech-nology of UHF cable PD is effective. The development of PD detection and location technology for UHF cables pro-vides a new direction for the research of on-line PD detection of cables.

关 键 词：XLPE电缆 高频 特高频 局放定位 解体分析 

分 类 号：TM247[一般工业技术—材料科学与工程]