Thermal power generating unit water vapor chemical fault diagnosis system and thermal power generating unit water vapor chemical fault diagnosis method

Abstract

The invention relates to a thermal power generating unit water vapor chemical fault diagnosis system and a thermal power generating unit water vapor chemical fault diagnosis method. The thermal power generating unit water vapor chemical fault diagnosis system comprises a man-machine interface, which is used to receive input parameters of external users; a water vapor chemical fault knowledge base, which is used to store the diagnosis basis of the water vapor chemical faults; a comprehensive database, which is used to store the identity information of the users, and is used to verify the identities; an inference machine, which is connected with the comprehensive database and the water vapor chemical fault knowledge base, and is used to receive the information input by the users, and is used for inference diagnosis; an explanation machine, which is connected with the man-machine interface, the comprehensive database, and the knowledge base, and is used to organize diagnosis results fed back by the water vapor chemical fault knowledge base in a unified way. The method comprises steps that the fuzzy diagnosis of the water vapor chemical faults of the thermal power generating unit is carried out to acquire fault types; credibility inference diagnosis is carried out according to the fault types, and corresponding fault reasons and corresponding credibility are acquired. Compared with the prior art, the thermal power generating unit water vapor chemical fault diagnosis system and the thermal power generating unit water vapor chemical fault diagnosis method have advantages of systematization, comprehensive diagnosis, and high accuracy.

Description

technical field [0001] The invention relates to the field of fault diagnosis of thermal power generating sets, in particular to a diagnostic system and method for water vapor chemical faults of thermal power generating sets. Background technique [0002] In the thermal system of a thermal power plant, water and steam are used as working media to complete energy transfer and conversion. Water absorbs the chemical energy produced by fuel combustion in the boiler and becomes steam with a certain amount of heat energy; steam works in adiabatic expansion in the steam turbine, converting heat energy into mechanical energy; the high-speed rotation of the steam turbine drives the generator to run, and further converts mechanical energy into electrical energy; The overworked low-temperature and low-pressure steam is condensed into water in the condenser, and re-enters the boiler together with the make-up water. The reciprocating circulation of water vapor in the thermal system is th...

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Problems solved by technology

[0005] In our country, the research on the diagnosis of water vapor chemical faults in thermal power generating units is still not deep enough. At present, the fault diagnosis is still based on the experience of the staff. This method is very easy to cause fault diagnosis errors caused by the staff themselves, and it does not Universal applicability, unable to give convincing diagnostic results for water vapor chemical faults of thermal power generating units comprehensively and completely

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