基于电磁耦合法XLPE电缆局部放电传感器的研制  

Development of Partial Discharge Transducer for XLPE Cables Based on Electromagnetic Coupling

作　　者：麦洪 张伟忠 张一鸣[2] 陈孝信[2] 

机构地区：[1]广东电网佛山供电局,广东佛山528000 [2]上海交通大学电气工程系,上海200240

出　　处：《电气自动化》2015年第4期115-117,共3页Electrical Automation

基　　金：广东电网公司;中压电缆现场验收及运行维护试验和检测方法的研究项目(K-GD2013-047)

摘　　要：局部放电是反映XLPE电力电缆绝缘状况的重要参量。电磁耦合法是目前检测XLPE电缆局部放电最有效的方法,基于电磁耦合法,设计并研制了用于XLPE电缆的局部放电传感器,根据局放信号的特点选择合适的磁芯材料,通过数学模型分析及试验对比,研究了积分电阻及线圈匝数等参数对电流传感器幅频特性的影响,确定了最优的积分电阻及线圈匝数等传感器关键参数。实验室测试及现场安装运行情况显示,研制的高频局放传感器安装方便、工作频带宽、灵敏度高,能满足XLPE电缆局部放电检测的要求。Partial discharge is an important parameter reflecting insulation of XLPE power cables. Based on the electromagnetic coupling method, the most effective means for testing partial discharge of SLPE cables, this paper designs and develops a partial discharge transducer for SLPE cables, selects suitable materials for the magnetic core according to the characteristics of the partial discharge signal, discusses the influence of the integrating resistance and turns of the coil upon the amplitude-frequency characteristics of the current transducer through mathematical model analysis and test comparison, and determines optimal key parameters of the sensor such as integrating resistance and turns of the coil. Laboratory tests and site operation show that the developed high frequency partial discharge sensor is easy to install, has a wide working frequency band and high sensibility, and can meet the requirements on the test of partial discharge of XLPE cables.

关 键 词：XLPE电缆 局部放电 罗戈夫斯基线圈 高频电流传感器 幅频特性 电磁耦合 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]