Optimal Regulator for AGC of Multi-Area Interconnected Power System with AC/DC Link

In this paper Automatic Generation Control of multi- area interconnected power system consisting of reheat type turbines has been studied. As a consequence of continually load fluctuation the frequency deviate over time and these transients are to be minimized to zero in terms of Area Control Error using optimal linear quadratic regulator. An optimal regulator has been designed to ascertain zero steady state frequency deviation deviation under all operating conditions. The performance of the proposed optimal regulator with conventional integral regulator has been compared. The simulation results reveals that better control performance in terms of overshoot and settling time can be obtained by optimal regulator. System is also studied with AC Tie-line only and DC Link parallel with AC Tie-line