A SIMULATION STUDY ON BOILER FAULT DIAGNOSIS EXPERT SYSTEM

摘要

The boiler is one of the key parts of power station. Monitoring the operation of the boiler automatically, continuously and accurately is very important. In case of malfunctions, an expert system might be helpful to find the sources of faults, and thereafter will assist the operator to act correctly and to prevent the fault from further development. In this paper, a simulation study of an expert system, which can diagnose the running faults of boiler system, is conducted. Shallow and deep two-layer knowledge base structure is used in this two layers of knowledge base. So, this kind of expert system can overcome the disadvantages of the old types of expert systems, which are only able to deal with experience rules base. A simulator of power boiler is used for the research on fault diagnose expert system. This boiler simulator gives all necessary information for the diagnosis. The knowledge base of expert system is built in hierarchies, so the speed of reasoning may be increased. After the reasoning the system can give proper suggestions to operator and can give also necessary explaination. Simulation results show that the task implementation can run in real time, and the system is correct and practicable.