Boiler Control Design Using Fuzzy Logic

Abstract

In this study, a nonlinear dynamic model for large scale fossil fueled boiler turbine power generation units is presented. The challenge in controller design for these plants exists because they are typically nonlinear and multi-variable with multiple control objectives. This thesis presents the application of a fuzzy logic based controller for boiler turbine plant to control the drum pressure, power output and water level. Fuzzy control system have been successfully applied to a wide variety of practical problems. It has been shown that these controllers may perform better than conventional controllers especially when applied to processes difficult to model, with nonlinearities, and when there is heuristic knowledge from human operators. The scopes includes the modelling, designing and simulation of boiler turbine, conventional controller PI and fuzzy controller. The models are carried out using MATLAB/SIMULINK. The simulation results demonstrate that performance of fuzzy logic controller is better.