Automatic Generation Control of Hydro-Thermal Power System Using 2DOF Fractional Order PID Controller Optimized with Crow Search Algorithm

Abstract

AbstractThe unceasing efforts to design an optimal controller in automatic generation control (AGC) of electrical power system motivate the design of a Two-Degree-of-Freedom Fractional Order PID (2DOF-FOPID) controller. Two-area interconnected reheat thermal and hydro including boiler dynamics and dead zone nonlinearity in each area is tested using the designed controller. The performance of the proposed controller is studied with the conventional PID controller and classical Two-Degree-of-Freedom PID (2DOF-PID) controller. The elemental intension of designing supplementary controllers aims to diminish the area control error (ACE). A new crow search algorithm (CSA) is chosen to evaluate the suitable values of controller gain parameters in order to curtail the figure of demerit (ITAE). The transient response of the system is investigated pertaining to 0. 01 p.u. load disturbance in area-1. Investigations reveal that the transient response is superior using the 2DOF-FOPID concerning the stability indices, viz. overshoot (Osh), undershoot (Ush) and settling time response of the power system.KeywordsAutomatic generation controlCrow search algorithmFractional order controller2DOF-FOPID controllerFrequency bias tie-line control