SYSTEM FOR ONLINE MONITORING OF ZINC OXIDE ARRESTER AND METHOD THEREOF

摘要

A system for online monitoring of a zinc oxide arrester comprises an arrester online monitoring master control unit, arrester leakage current online monitoring units (1, 2, 3) and a busbar voltage online monitoring unit (4). The arrester leakage current online monitoring units (1, 2, 3) consist of an arrester current acquisition assembly and a first data processing and analyzing assembly; and the busbar voltage online monitoring unit (4) consists of a busbar voltage acquisition assembly and a second data processing and analyzing assembly. The system realizes a real-time monitoring of the total leakage current, resistive current, capacitive current and the number and time of lightning strokes of the arrester, and can automatically adjust the amplification factor according to the magnitude of a measured current to realize a highly precise measurement and analyze and process the monitored data on the basis of field working conditions; the system is free from the influence of environmental temperature and humidity, and is capable of timely pinpointing such problems in the arrester like the leakage current of an insulator or an insulating rod increases due to dirtiness or dampening inside the arrester, so that accidents are effectively prevented from occurring.