Evolutionary Computation Based Comparative Study of TCPS and CES Control Applied to Automatic Generation Control

Abstract

This paper presents the comparative analysis of the optimal transient performance of automatic generation control (AGC) of an interconnected two-area power system, having multiple thermal-hydro-diesel mixed generating units. The significant improvement of optimal transient performance is observed with the addition of a thyristor-controlled phase shifter (TCPS) in the tie-line or small capacitive energy storage (CES) units fitted in both the areas. The optimal values of the gain settings are obtained by three different optimization algorithms. Craziness based particle swarm optimization (CRPSO) proves to be moderately fast algorithm and yields true optimal gains and minimum overshoot, minimum undershoot and minimum settling time of the transient response. Comparative study of TCPS and CES reveals that the CES units fitted in both the areas improve the transient performance to a greater extent following small load disturbance(s) in both the areas.