The Remote Monitoring System For Zinc Oxide Arrester Based On GPRS

The arrester is over voltage protection device for the power equipment, and its performance has great influence on the safe operation of power equipments. But some of MOA will deteriorate gradually under operating voltage and some of them will be moistened because of structure problems.The two faults can lead to increasing of leakage current of the arresters, MOA may turn to thermal run away and even explosion when overvoltage appears.To solve the above problem, a method of remote monitoring system for MOA is brought out in this paper. Data of on-spot collection is transmited throuhgt GPRS module. A MOA's reasonable online monitoring model is established to eliminating the efect of the two interference sources. The system diagnoses the operating MOA status with the method of harmonic current Analysis.A new method of remote monitoring for MOA based on GPRS was presented. The system diagnoses the operating MOA status with the method of harmonic current analysis. The monitoring system consists of on-spot collection module, GPRS transparent transmission module, romote monitoring center. C8051F020 is on-spot collection module's microprocessor, the resistive first-harmonic current of MOA is spected throght this module The software of information management system was developed with Visual Basic and SQL Server based on the research of GPRS wireless communication technology. Data of on-spot collection is transmited throght GPRS module. Data report based on data of on-spot collection can be formed in this system.The state of MOA can be spected conveniently and accurately, and the historical data can be inquiried and analysised throght romote monitoring center.The actual measuring results indicate that the monitoring system has the high accuracy,and can be used to realize the romote monitoring for MOA.