Design And Implementation Of Subsystem For AHP Fault Diagnosis Based On Fuzzy Control

With the rapid development of the world economy,in recent years,energy crisis,environmental contamination and other issues have become increasingly prominent.The development and application of nuclear power technology can reduce the exploitation of traditional fuels such as coal and oil,but also alleviate the environmental issues such as greenhouse effect,acid rain and haze caused by excessive emissions of carbon dioxide and sulfur dioxide.With the development of nuclear power technology,the proportion of nuclear power generation in the total power of the whole world has gradually increased,and nuclear power reflects its stable and efficient characteristics.Nuclear power plants generally have the characteristics of large installed capacity,high nuclear safety requirements.So it has extremely high standard of malfunction diagnosis,starting conditions,which requires to solve the problems accurate and timely.Based on the correct and timely diagnosis of fault,the failure of nuclear power plants can be repaired properly.However,due to the complexity and particularity of practical problems,there are many problems in nuclear fault diagnosis.It cannot be solved by establishing accurate mathematical model or numerical method.It is difficult to establish accurate simulation model to describe complex problems in fault diagnosis.The power supply heating system of the nuclear power station includes the low pressure heater and the high pressure heater.The function of the system is to use the steam extraction of the high pressure cylinder of the steam turbine,and to feed the water supply of the secondary circuit.At the same time,the system receives the hydrophobic separation of the steam and water to further improve the thermal cycle efficiency of the nuclear power unit.With the development of the nuclear power plant installed capacity to large capacity and high parameter,water heater heating system to bear the water pressure and tank temperature is also gradually increased.Therefore,in addition to ensuring the quality of the water supply system in the design,manufacture and installation,we must be in the unit daily and overhaul during the operation,maintenance and other aspects to take adequate measures to ensure the long-term safe and stable operation of water supply heating system.In this paper,research object is the nuclear power plant water supply heating system(AHP).Based on the fuzzy control principle,I aim to design and implement a fault diagnosis subsystem.The system can accurately identify the fault according to the real-time data of the production site and analyze the cause of the fault.The system can also provide accurate guidance for the subsequent fault handling and post-analysis.At the same time,the subsystem implements two functions of reasoning abnormal phenomena and corresponding processing methods according to the possible equipment failure,so as to determine the cause of the fault in the first time after the abnormality,and provide strong support for the subsequent maintenance work.