交叉互联接地电缆系统局放检测的仿真研究  

The Emulation Research of Partial Discharge Detection for the Cross Bonding Cable System

作　　者：章鹿华[1] 王伟[2] 李华春[3] 

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]华北电力大学,北京102206 [3]北京市电力公司,北京100031

出　　处：《电测与仪表》2010年第1期38-42,共5页Electrical Measurement & Instrumentation

摘　　要：高压XLPE电缆系统缺陷大多发生在电缆附件部位,因此电缆的局部放电检测集中在电缆附件上。由于长距离电缆系统通常采用交叉互联的接地方式以减少屏蔽层损耗和降低电缆末端的电压升高,这样三相系统之间就存在放电信号互扰问题,放电相的脉冲信号就可以在其他相被检测到。本文针对此种电缆系统局部放电现场检测情况,设计了应用于电缆中间接头的VHF宽频带电容型传感器,并应用ATP软件对具有交叉互联接地方式的XLPE电缆系统进行仿真研究,通过对各种典型放电情况的仿真结果分析,掌握了此系统的局部放电信号互扰规律,为局部放电检测系统应用于现场在线检测提供了理论依据。The main reason for defects in HV XLPE cable system is the condition of the joints due to improper on-site assembly. Therefore PD measurement has to concentrate on the cable accessories. Long HV cable systems are usually designed as cross bonding systems to minimize shield losses and to limit voltage rise at the cable ends, so there is a cross-talk of all three phases in the cross bonded cable system. A PD pulse is able to leave its fault related phase and can be also verified in the other two phases. According to this situation, we design a kind of capacitive sensor using on the cable joints. We master the rules of PD propagation in the cross bonding XLPE insulated cable system by ATP, which is the basic for the on-site detection in the future.

关 键 词：局部放电 交叉互联 互扰 ATP 仿真 

分 类 号：TM274[一般工业技术—材料科学与工程] TM935.4[电气工程—电工理论与新技术]