基于 tev 法的电缆终端局部放电状态监测装置的研制 development of cable termination pd condition monitoring device based on tev method.pdfVIP

第 41 卷 第 12 期 电力系统保护与控制 Vol.41 No.12 2013 年 6 月 16 日 Power System Protection and Control Jun.16, 2013 基于 TEV法的电缆终端局部放电状态监测装置的研制 1 1 1 1 2 李旭涛 ，周 凯 ，万 利 ，赵 威 ，罗安栋 (1.四川大学电气信息学院，智能电网四川省重点实验室，四川 成都 610065； 2.川开电气股份有限公司，四川 成都 610213) 摘要：研制了一种基于 TEV (暂态对地电压)法的电缆终端局部放电（PD）状态监测装置。基于 TEV 法原理建立了电缆终端 PD传播的波阻抗模型；在此基础上研制了一种用于PD检测的新型贴片式传感器，对其设计方法和响应特性进行了分析，并 且提出了一种电缆终端远程无线监测方案并试制了一套装置样机，装置采用PRPD（局部放电相位分析）技术完成PD的统计 分析与识别。通过现场实测数据表明，该装置的设计原理和检测效果能够满足电缆终端状态监测的需要。 关键词：电缆终端；局部放电；暂态对地电压；状态监测；PRPD Development of cable termination PD condition monitoring device based on TEV method 1 1 1 1 2 LI Xu-tao , ZHOU Kai , WAN Li , ZHAO Wei , LUO An-dong (1. School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China; 2. Chuan Kai Electric Co., Chengdu 610213, China) Abstract: A kind of cable termination PD (partial discharge) condition monitoring device based on the TEV method is developed. In order to discuss the response characteristic of PD pulses, the wave impedance model of the PD propagation is built. Furthermore, a new kind of sensor for the PD detecting of the cable termination is designed and manufactured based on the wave impedance model. Moreover, a wireless PD monitoring scheme based on this kind of sensor is presented and a prototype of the monitoring device for the cable termination is developed. By using PRPD (phase resolved partial discharge) technique, the detecting reliability of the monitoring device is guaranteed. Finally, the testing data show that the design principle and monitoring results of the devic