A robust PI based LFC design using BF-NM algorithm

This paper presents a novel optimization approach using hybrid algorithm, named BF-NM, to determine the optimal values for the proportional-integral (PI) controller parameters in automatic generation control (AGC) of a single-machine-infinite-bus system. A local search algorithm called Nelder-Mead is combined with BF technique to improve optimization procedure for fully exploiting the promising solution region. In the design procedure the nonlinear constraints such as Generation Rate Constraint (GRC) will be also taken into account. Comparative results of the proposed control strategy and other intelligent methods, CRAZYPSO and BF, reveal the effectiveness of this new technique in terms of reducing settling time, overshoot and oscillations.