Research On Fault Diagnosis Expert System Of Hydroelectric Generating Set Vibration Based On Petri Network

This paper introduced the latest research achievements in the field of hydroelectric generating set vibration at home and abroad and the significance of hydroelectric generating set vibration. In order to make the reader to understand that the mechanism of hydroelectric generating set vibration fault, had carried on the simple elaboration to the hydroelectric generating set's structure and the principle of work. The vibration fault of the hydroelectric generating set caused by hydraulic, electromagnetic and mechanical factors that had been classified. Introduced that the common several intelligence fault diagnosis method,at the same time proposed the expert system in the fault diagnosis domain mature application. At last integration of the advantages of the Petri net theory which has a good mathematics description way and the graph turn of expression, established the fault diagnosis expert system inference model,and applied it in the hydroelectric generating set vibration fault diagnosis. Specifically include the following aspects:(1) An overview of the status quo of China's present stage and prospects of hydro power development, discusses the significance of the hydroelectric generating set vibration fault diagnosis at home and abroad, introduced the development trend and the level of vibration fault diagnosis of the status quo.(2) Described the structure and working principle of hydroelectric generating set, and analyzed the causes of the hydroelectric generating set vibration faults.(3) Introduced that the fault diagnosis method and the common intelligence fault diagnosis method in hydroelectric generating set's application, and introduced fault diagnosis method based on expert system.(4) Introduced the Petri net knowledge and the hydroelectric generating set fault diagnosis expert system's Petri net inference model; Carried on the refinement analysis to the Petri network fault diagnosis model inference method, and a example proof had been carried on.(5) Introduced the vibrates fault diagnosis of hydroelectric generating set expert system, and using design simple hydroelectric generating set vibration fault diagnosis expert system.