Design and Simulation of a Steam Turbine Generator using Observer Based and LQR Controllers

Steam turbine generator is an electromechanical system which converts heat energy to electrical

energy. In this paper, the modelling, design and analysis of a simple steam turbine generator have

done using Matlab/Simulink Toolbox. The open loop system have been analyzed to have an

efficiency of 76.92 %. Observer based & linear quadratic regulator (LQR) controllers have been

designed to improve the generating voltage. Comparison of this two proposed controllers have

been done for increasing the performance improvement to generate a 220 Dc volt. The simulation

result shows that the steam turbine generator with observer based controller has a small percentage

overshoot with minimum settling time than the steam turbine generator with LQR controller and

the open loop system. Finally, the steam turbine generator with observer based controller shows

better improvement in performance than the steam turbine generator with LQR controller.