Based On The Agent's Circuit Breaker Fault Diagnosis System Design

As an important device in high-voltage electrical apparatus, high-voltage circuitbreakers play the dual role of control and protection in the power system. The healthstatus and operating reliability of circuit breakers are directly related to the security andstability of power system. Therefore, the condition monitoring and fault diagnosticsystem was designed in order to reduce the fault rate of high-voltage circuit breakersand effectively improve the reliability of high-voltage circuit breakers. The system wasstudied from the following four aspects.Firstly, to overcome the shortcomings of traditional systems of fault diagnosis, themulti-agent technology was applied to fault diagnosis of circuit breakers in this paper.The paper have made research on the task decomposition, organization structure, themechanism of communication and coordination which are involved in the systems offault diagnosis based on multi-agent.Secondly, the paper have studied the extract method of characteristic parametersabout vibration signals which were used by characteristic-extracting agents. A newmethod of feature extraction was proposed by associating the empirical modedecomposition with the information entropy theory. The results of simulation and testshow that the extracted characteristic parameters can sensitively reflect changes ofhigh-voltage circuit breakers status with this method. It provides a new method for faultdiagnosis of circuit breakers.Thirdly, fault diagnostic strategy of diagnosis agents about high-voltage circuitbreakers was studied. In practical applications, on account of the circuit breakers cannot act frequently, a large numbers of fault samples can not be obtained for training. Thesupport vector machine is a learning machine based on the structural risk minimization,which provides an effective solution for the classification problems of small sample learning. At the same time, introduction and application analysis about fuzzy fusion ofagents’ diagnosis results were performed.Finally, according to the management and operation mode of currently domesticelectrical equipment and the particularity of the condition monitoring and faultdiagnosis of circuit breakers, a condition monitoring and fault diagnosis system ofcircuit breakers based on multi-agent was designed. At the same time, the hardware andmanagement software of computer based on the design were developed. The test resultshows that the system can effectively unite the large-scale database, the experts ofinstitutes, the equipment maintainer and field monitor to realize the effective utilizationof multi-diagnosis resources. Consequently, the accuracy and efficiency of circuitbreakers fault diagnosis were improved.