AUTOMATIC GENERATION CONTROL OF TWO AREA POWER SYSTEM WITH AND WITHOUT SMES: FROM CONVENTIONAL TO MODERN AND INTELLIGENT CONTROL

This work proposes a Fuzzy Gain Scheduled Proportional-Integral (FGSPI) controller for automatic generation control (AGC) of two-equal area interconnected thermal power system including the Superconducting Magnetic Energy Storage (SMES) unit in both areas. The reheat effect nonlinearity of the steam turbine is also consideredin this study. Simulation results show that the proposed control scheme with SMES is very effective in damping the frequency and tie-line power oscillations due to load perturbations in one of the areas. To further improve the performance of the controller, a new formulation of the area control error (ACE) is also adopted. Theproposed FGSPI controller is compared against conventional PI controller and state feedback LQR controller using settling times, overshoots and undershoots of the power and frequency deviations as performance indices and the performance of the proposed controller is found better than the other two. Simulations have been performed using Matlab .