LYAPUNOV RULE BASED MODEL REFERENCE ADAPTIVE CONTROLLER DESIGNS FOR STEAM TURBINE SPEED

A steam turbine, heart of all refineries. This work presents the mathematical modelling of the steam turbine unit in isolated operating condition, based on the continuity equation including servomotor for actuation purpose. Steam turbine should run at a constant speed for its safe operation and frequency stability. Adaptation of different controller like Feedback, PI, PID using certain adaptation techniques improves the performance of the system. This paper investigates Model Reference Adaptive Controller for speed control of Tandem compound reheat steam turbine using Lyapunov Rule to improve set point tracking and control over the turbine speed.