Research Of The Remote Monitoring System For MOA Based On GPRS

During Gapless Metal Oxide Arrester(MOA) actural operation, interior aging and damping may cause resistive current to increase, ZnO element temperature will rise, MOA may turn to thermal runaway and even explosion when overvoltage appears. In order to ensure MOA run normally, the state of MOA needs to be detected.Now the method of detecting MOA state on the spot is widely used interiorly and overseas, inspectors should examine at certain time. In order to know the state of MOA, measuring result needs to be send to management center. The method of fiber transmission was brought forward, it is a good way for long-distance data transmission , nevertheless, troublesome to lay fiber. To conquer the defect of this transmission method, a new method of monitoring of metal-oxide arresters in long distance was presented.In this paper, the online monitoring system based on GPRS of MOA was developed. The monitoring system consists of on-spot collection module, GPRS transparent transmission module, long-distance monitoring center. The design of hardware and software of AT89C52 microprocessor according to the data collection and processing module was introduced. GPRS transparent transmission module was developed by MC35i module and W77E58 microprocessor. The software of information management system was developed with Visual Basic and SQL Server based on the research of GPRS wireless communication technology. Datareport can be formed in this system. The state of MOA can be inspected conveniently and accurately. Electric power system can run in the reliable state.In the end of the paper, the system was evaluated, further development in MOA monitoring system was described.