Comparative analysis of AGC performance in an interconnected power system with HVDC and TCSC considering GRC and deadband non-linearities

Power electronics applications in power system has significantly increased to improve the capacity of the existing system as well as the power quality. This paper discusses a comparative analysis of Thyristor Controlled Series Compensator (TCSC) and High Voltage Direct Current (HVDC) link to improve the performance of Automatic Generation Control (AGC) of two-area interconnected thermal-thermal power system considering non-linearities effects of Generation Rate Constraints and Governor Dead band. A quadratic performance index is minimized to obtain optimal integral gain settings of the control areas. Simulation results clearly validates that, incorporating TCSC and HVDC effectively stabilizes area frequency and tie-line power oscillations after a sudden load perturbation. It is evident that TCSC improves AGC performance better in comparison with HVDC.