摘要
金属氧化物避雷器(MOA)缺陷严重影响电网的安全运行。介绍了一种基于无线通讯和GPS授时的便携式MOA检测系统。该系统测量MOA泄漏电流阻性基波分量,应用GPS授时功能实现异地高精度同步采样,并应用基于nRF905的射频通讯,使得检测接线简化。应用了基于Fourier级数的相差算法,据有高精度。该系统具有数据存储功能,使用一个便携设备就可以完成多个站点的测量和数据收集,并可以将数据上传至上位机,进行历史数据分析。该系统已在河南省郑州110 kV牛砦变电站安装,并稳定运行。
Metal oxide surge arrester （MOA） deficiency is severely harmful to the power system＇ s safety. A novel portable MOA detection system based on wireless communication and GPS was introduced to detect the MOA basic component of resistance leakage current, which uses the GPS time giving function to realize the remote high-precision synchronous sampling and radio frequency communication to make the system more simpler in remote measurement. At the same time, the phase difference measurement algorithm based on Fourier progression was used to acquire high precision. Moreover, the system also has the ability to store data, so as to accomplish tasks of measurement and data acquisition at numbers of transformer substations with the portable detection system. Furthermore, measured data can be uploaded to the computer and analyzed with the PC software. The developed detection system has been installed in an 110kV Niuzhai substation in Henan province and has run stably.
出处
《电瓷避雷器》
CAS
北大核心
2009年第5期41-45,共5页
Insulators and Surge Arresters
关键词
MOA
阻性电流基波分量检测
无线通讯GPS授时
MOA
resistance current fundamental components detection
wireless communication
GPS time giving
