摘要
针对电气化铁路通信机房接地体的特殊运行环境受到的电磁干扰,设计了一套接地电阻在线监测系统。采用变频法测量接地电阻,将辅助电压极置于接地体与辅助电流极之间距离的0.59处,可以精确地测量接地电阻的大小,减少工作量;应用FIR滤波与FFT插值的抗干扰方案,使得沿线机房接地电阻在不断电的情况下实现精确的在线监测。应用该系统对电气化铁路通信机房接地电阻进行了现场实际测量,结果表明,该系统在电气化铁路强电磁干扰环境下能准确测量,可靠工作。
Aimed at electromagnetic interference occurring at grounding object in communication station of electric railway under specific service conditions, an on-line monitoring system was developed. Using frequency converting technology, the accurate grounding resistance can be easily measured with a auxiliary voltage electrode installed at 0.59 times the distance between the grounding object and the auxiliary current electrode. Using the anti-interference solution with FIR filter and FFT interpolation, accurate on-line monitoring and measuring of grounding resistance of station can be realized. Site measurement of station grounding resistance was conducted, which proved accurate measurement with the developed system under severe EM interference of electric railway.
出处
《电瓷避雷器》
CAS
北大核心
2009年第1期42-46,共5页
Insulators and Surge Arresters
关键词
电气化铁路
接地电阻
在线监测
electric railway
grounding resistance
on-line monitoring
