Researcli On Application Of On-Line Monitoring System Of Power System Faults And Characteristics Of Circuit Breaker

High voltage circuit breaker is the electric power system protection and operation of the important electrical equipment, ensure the reliable and stable operation of the circuit breaker is very important, at present in the realization of the preventive maintenance system of circuit breaker blindness, pertinence and effectiveness, maintenance equipment with high try rate, decrease the reliability. Statistics show that the number of failures due to circuit breaker operating mechanism and its drive system mechanical failure accounted for a circuit breaker malfunction, refuse to move the the failure total number of more than40%, so we must to circuit breaker status of on-line monitoring, real-time monitoring the operation state, provide the basis for the equipment maintenance.Analyses the fault wave record the use present situation, put forward based on the existing fault wave record device, keep the fault wave record, distance function, strengthen the protection action records, analysis function, increase the circuit breaker operational property parameters monitoring and analysis function, development of power grid failure and operational property of integrated monitoring system. According to the IEEE suggestions of circuit breaker fault monitoring object selection principle, in the process of circuit breaker points off each time parameters, metal short meet time, total travel, insert stroke, stroke, dynamic contact rate, phase coil current and contacts life and protection movement parameter monitoring, the analysis of the above parameters in detail, put forward the monitoring method and analysis method, the limit after the data processing scheme is put forward.Field test on the prototype, and the monitoring results of similar imported products and test data analysis, to achieve the intended target.