FAULT FUZZY KNOWLEDGE LIBRARY OF A WHOLE-BYPASS U-PIPE HIGH-PRESSURE HEATER SYSTEM AND ITS FAULT DIAGNOSIS WITH FUZZY PATTERN RECOGNITION METHOD

摘要

A whole-bypass U-pipe high-pressure feedwater heater system is taken as the object investigated in this paper because it is widely adopted in a thermal power unit of large capacity. Its typical fault fuzzy knowledge library is generalized completely through detailed fault simulation tests by putting the heater system into the whole thermal system under the advantages of our power station simulation technology. The heater system fault diagnosis is further realized with fuzzy pattern recognition method. Fault diagnosis examples are given which show that good diagnostic results can be acquired with fuzzy pattern recognition method by using the fault knowledge library of the high-pressure heater system established in the paper.