Research On The Health-Diagnosis System Of Vacuum Circuit Breaker

Vacuum circuit breaker is one of the most broadly applied electric devices in power systems. It is used to control and safeguard electric power equipment in electric power system. The status of breakers directly influences the stability and reliability of power system. When it gets out of order, it will cause electric power accident or other indirect accident.In recent years, as a result of the unceasing enhancement of electrical powersystem voltage rank, the request of the reliable leve high of the vacuum circuit-breaker is more and more high. The traditional scheduled maintenance or Time Based Maintenance has some serious defects, such as sub-maintenance, over-maintenance and the faults caused by the maintenance accident. Condition Based Maintenance, being based upon condition monitoring, is the most advanced maintenance program nowadays. So, to carry out on-line working condition monitoring research for Vacuum circuit breaker is of great significance to enhance the maintaining of circuit-breakers and to convert from planning maintenance to condition based maintenance.This thesis aims at the on-line monitoring of the vacuum circuit breaker, in accordance with massive investigation and study, we get a series of parameters which can reflect healthy state of the vacuum circuit breaker, and then analyze the advantages and dis advantages of the existing examination methods of these parameters, finally determine the monitor object as well as the sensors, and unifies the project "automated system of the city electrical network based on Self-healing Control technology" which is cooperated by Nanjing Automation Research Institute and Nanjing ElectricPower Company, and develop the vacuum circuit-breaker on-line monitoring installment.