Development Of The Type ZN65-12Vacuum Circuit Breaker On-line Monitoring System

Mechanical characteristics of vacuum circuit breaker on-line monitoring equipment actual state of repair for basis, to come true by" overhaul" to the" maintenance" change created a condition, to improve power supply reliability, ensure the security of the power system, reduce the cost of maintenance is very important.Huaneng Jining Power Company Limited6kV canal in the power distribution system, vacuum circuit breaker using rate is100%such as#3、4total assembly having50sets of spring operating mechanism in type ZN65-12switch, but has been in use is the traditional conservative" plan to overhaul overhaul", not only a certain lack of pertinence, and blind periodic maintenance has brought a large amount of waste.This paper discusses the circuit breaker mechanical characteristic parameters of monitoring method, combining with the author’s work of Huaneng Jining canal power company limited by the use of the ZN65-12type vacuum circuit breaker’s actual situation, to develop a set of high voltage circuit breaker online monitoring and fault diagnosis system, embedded into the level of equipment state maintenance system.The system calls directly to the Matlab programming language, using Matlab rich data processing method and a mathematical model for high voltage circuit breaker, data acquisition, storage, processing, computing, communications and other functions, the vacuum circuit breaker closed, opening time, average speed, contact travel and other mechanical parameters, test results analysis, when we find a parameter or abnormal wave, namely through the Ethernet to the entire data highway radio, operator stations receiving information through the database and monitoring picture link, will result in the correct form is shown in the corresponding position on the screen.Taking into account our company original6kV distribution system has been running for more than ten years, this paper design of the sensor and the original system isolation, does not affect the normal operation of the vacuum circuit breaker, the mechanical characteristics of vacuum circuit breaker on-line monitoring. At the same time, as a result of monitoring system using multiple sensor combination scheme, overcomes the various sensors for measuring their respective comers, can make the measuring accuracy is improved.