宽频带电流传感器在检测交联聚乙烯电缆局部放电中的应用  

Wide band current transducer sensor for partial discharge detection in XLPE cable

作　　者：朱俊栋[1] 杨连殿[1] 贾江波[1] 杨兰均[1] 张乔根[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《绝缘材料》2006年第1期33-36,共4页Insulating Materials

摘　　要：研制出一种基于Rogowski线圈的高频宽带电流传感器用于检测交联聚乙烯(XLPE)电力电缆中的局部放电。通过磁芯材料的选择和主要参数的优化,该传感器可具有较好的高频特性和较宽的频带(230kHz^120MHz),同时具有阶跃响应快、线性度好和延迟小的优点。和IEC_270法相比,对于实验室内XLPE电缆绝缘层一人为缺陷,该传感器置于XLPE电缆接地线上可灵敏的检测到局部放电,其灵敏度要高于IEC-270法。Based on the theory of Rogowski coil, a high frequency （HF） broadband current transducer（CT） is developed to detect partial discharge（PD） in XLPE power cable. By selecting magnetic material and optimizing the main parameters, the CT sensor is constructed to reach the high frequency characteristics with a bandwidth of 230kHz～120MHz. The CT sensor, which has the characteristics of fast step response, good linearity and small changes on delay, was then placed to detect the partial discharge at the grounding part of XLPE cable. The results show that partial discharge in XLPE cable canbe detected sensitively. The sensitivity of the CT sensor was also checked against pulse current technique （IEC-270） by performing PD measurements in an artificial defect in XLPE-insulated cable under the laboratory conditions. The sensitivity of the CT sensor is better than that recommended in the IEC 60270.

关 键 词：交联聚乙烯电缆 局部放电 电流传感器 宽频带 

分 类 号：TM247.4[一般工业技术—材料科学与工程] TM934.3[电气工程—电工理论与新技术]