【摘要】 分析了氧化锌避雷器 (MOA)在线监测的现状与存在的问题 ,在基波法基础上采取小电流取样、参考信号选取、信号分时处理及自校准等方式研制了新在线监测系统 ,可在近测、遥测、自动化测量三种方式间灵活选择 ,数据可在局域网上共享 ,实现了在线监测全盘自动化。对 5 0 0 k V避雷器在线监测表明 ,该系统在信号采集、处理和抗电磁干扰等方面具有很好的特性。更多还原

【Abstract】 In this paper, the existing problems of the on-line monitoring of ZnO surge arresters are discussed. On the basis of the measuring method of resistive basic harmonic current, some improvement is introduced, including the study of small signal sensor, selection of reference signal, time sharing and self calibration technique. The on-line monitoring of 500 kV ZnO surge arresters shows that the performance of this instrument is perfect at the collection, processing of the signal and preventing electromagnetic disturbances. Furthermore, it can be used freely among the 3 modes of local test, remote test and automatic test to realize the goal of full automation.更多还原