Research About The On-line Monitoring And Fault Diagnosis System Of High Voltage Circuit Breaker

With the increasing growth of power system capacity, The high voltage breakersplay a more and more important role in power system. The reliability of the breakers,which communicate power with the use, are essential for the safety of the powersystem. The monitoring of breakers usually occur during the blackout combined withmaintenance regular preventive test to Replacement parts and operating mechanism ofmechanical properties examination. Experience shows that frequent operation andexcessive remove the repair will reduce the high voltage circuit breaker actionreliability. Therefore, the implementation of the high voltage circuit breaker statusdiagnosis or real-time on-line monitoring, timely knows its operation condition,grasps its operation characteristic and changing trend are very important forimproving its operation reliabilitythis paper firstly explains the high voltage circuit breaker of the basic structureand working model, and emphatically introduces the breaker switching process andarc model, making prepares for on-line monitoring principle and data analysis theory.The third chapter details the principle of high voltage circuit breaker on-linemonitoring, including a side current, operation coil and vibration signal of the on-linemonitoring, and simply introduces the signal characteristic parameter selected method.Finally, this paper gives a kind of circuit breaker on-line monitoring and faultdiagnosis system design scheme, and gives the examples of fault diagnosis, improvedthe failure analysis evaluation method, and the circuit breaker test confirms thereliability of the method.This paper mainly method of signal characteristic parameter extraction is basedon wavelet theory. The test has proved that wavelet analysis is suitable for analysis offault signal of the breaker. In addition, this paper also puts forward a kind of improvedelectric wear calculation method with high accuracy, and has a certain reference valueto electric life research.