Antifouling Flash Monitoring System

Contamination flashover occurs when insulators contamination and humidity state reaches a certain degree. The variety of insulators leakage current has close relation with insulators contamination and humidity state and generally reflects the course of contamination flashover. Contamination flashover monitoring system predominates the insulators insulation degree by measuring leakage current, environment temperature and humidity and then processing, analyzing the data. The method of passive general fixed cleaning will be substituted by the method of active part random cleaning to extremely prevent the contamination flashover.Firstly the mechanism of contamination flashover is researched in the paper. On the basis of studying the parameters that manifest the insulators contamination degree the system monitoring parameters are confirmed. In order to fulfill the different monitoring request and acquire the different data On-line Analysis Monitoring System and On-line Monitoring Off-line Analysis System are respectively realized.In the On-line Analysis Monitoring System MSP430 single chip serves as field device's CPU to complete the task of sampling and processing early data. The backstage computer in the room communicates with each field device by wireless communication on time. The computer receives and processes data in order to predict alarm or give an alarm on the insulators contamination and humidity state. The system can make out the leaky current wave graph of any insulator if necessary and complete such functions as database management, report forms and printing.On-line Monitoring Off-line Analysis System adopts the way of on-line monitoring and off-line analyzing. MSP430 single chip also serves as field device's CPU to complete the task of sampling, processing data and keeping history data in memory. Then the data can be collected with the handy terminal and transmitted to the backstage computer through normative RS-232 COM on the handy terminal byserial data transfer. Finally the data is processed and analyzed on the computer to get the decision- making of insulators insulation degree on the high voltage network.