Design of Robust Fractional Order Lead-Lag controller using a Hybrid Dynamic GA-BF Algorithm for Power System Oscillation Damping

This paper deals with the design and analysis of a fractional-order robust lead-lag compensator based damping controller to enhance the dynamic stability of power system having disturbance uncertainty. First, the fractional order lead-lag controller is optimized as the Power System Stabilizer (PSS) by transforming the design problem to an optimization problem in which, the objective function is the Integral of the Time-Weighted Absolute Error (ITAE), and the constraints are the parameter limits. The parameter optimization is done by using a hybrid met heuristic algorithm. Furthermore, the stability of the closed loop fractional-order power system is discussed, and a sufficient condition for stability analysis is proved. The robustness and stability performance of the proposed controller have been ensured through extensive simulations and evaluating some performance indices on the test system under various disturbance scenario, operating points and system parameter variations.