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Atmospheric pollution , deterioration of water environment in recent years , become increasingly serious depletion of fossil fuels , wind power as alternative energy sources , a new force , the rapid development of the installed capacity of the various countries have substantial growth each year . But on the current situation , the annual utilization of wind farm wind power generation equipment is less than 80% , the actual failure rate of more than 20% , the statistics of several wind farms in China had reached 170 million yuan in losses in 2008 alone , . Therefore, in order to reduce the loss of large wind machine fault diagnosis is necessary and imminent . The subject of large-scale wind turbine structure , statistics of each subsystem failure , the failure of the various subsystems of the generating capacity of the wind farm . Large wind turbines wind turbine installed power of more than 100 kilowatts , mainly used in wind farm use is transmission system failure up to the electrical system , the power generation . The article uses the finite element analysis software dynamic analysis of the key parts of large wind turbines tower and driveline gear , the vibration characteristics of the tower and other related components , based on field data using spectrum analysis , power spectrum analysis and other methods extracting fault symptoms of large wind turbine components . And on this basis, organize , summarize these signs , and thus the formation of large - scale wind turbine fault diagnosis expert system knowledge base . Expert system expert system tools VP - EXPERT , PROLDG , CLIPS, object-oriented languages ??, database software implementations . In this paper, the FTA technology , programming oriented object language the VC and database Access2003 combination of large-scale wind turbine fault diagnosis expert system knowledge base and the inference engine , based on the the fault symptoms - the cause of the failure mode of the large wind turbine fault diagnosis expert system building , improvement of the expert system tool interface unfriendly applications is not easy .
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