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A Fuzzy Logic Based Power Plant Conveyor Coal Fired Boiler System

R.Senthil Kumar

Main essence for the thermal power plants that may be either coal or natural gas power plants to be in command of the temperature and pressure controllers (PI.PD, PID) is generally employed. The raw material, coal is nosh in to the boiler using conveyer system and it is a time shifting one. This coordinated boiler turbine system, multivariable complex process, nonlinear and also slowly time variant plant with hefty settling time. This is due to the unpredictable demand in the load side Also it makes the PI.PD, PID controllers to have very a reduced amount of efficiency. To make it as a high efficient one, the FUZZY LOGIC is used to control and it is a self and auto tuning process. The control of boiler temperature and pressure is done by FUZZY logic controller without the human intervension. Sensor materials like Temperature sensor (LM235) and pressure sensor (POTENTIOMETRIC TYPE) are used to sense the temperature and pressure. When the normal level of temperature and pressure value exceeds, it will give the signal to FUZZY controller. Then fuzzy logic controller that is used to control is worn the boiler system by given value to it by using its membership functions values. Since FUZZY logic controller is used, controlling sped is possible at any time Multivariable, nonlinearity and time varying and time varying of the unadventurous coal conveyor system can be easily eliminated. Unremitting controlling is applied by relay unit. Effectiveness is high compare with existing technology. Low temperature and pressure values can be set up in this strategy of FUZZY logic controller comparing with the conventional controller approach.