“…Compliance with North American electric reliability council (NERC) control performance standards (CPS) for AGC under deregulated environment, are discussed in [31,41]. Recently various control strategies are reported in the literature for AGC of restructured power systems such as trajectory sensitivities using gradient Newton algorithm [30], eigenstructure assignment technique [31], H 2 /H 1 control [32], neural networks [33], firefly algorithm [34], hybrid neuro fuzzy [35], genetic algorithm [34,37,38], bacteria foraging [41,42], non-integer controller [42], active disturbance rejection [43], fuzzy logic controller [34,44,45], particle swarm optimization [45] and optimal control [31,45,46].…”