Fuzzy Adaptive PID Control for PH Value of Wet Flue Gas Desulfurization in Thermal Power Plants
The SO2 emission of thermal power plants has always been the focus of air pollution prevention.The higher the de-sulfurization efficiency of the power plant's desulfurization system,the cleaner the gas emitted.The PH value of the slurry in the de-sulfurization system slurry pool is a key factor affecting the desulfurization process.Aiming at the characteristics of slurry PH value nonlinearity,hysteresis and large inertia,this paper proposes a fuzzy adaptive PID control method for slurry PH value,which dy-namically corrects the PID parameters according to the change of the detection amount,and realizes adaptive adjustment.The PID and fuzzy PID control are modeled and simulated in Matlab/simulink.Through the comparative analysis of the two response curves,the oscillation size and the number of oscillations,overshoot,adjustment time,and system performance of the fuzzy adaptive PID control system can be obtained.The stability is better than traditional PID control,and the overall control performance of the system is significantly improved.
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