Fig. 10From: Comparative performance analysis of hybrid differential evolution and pattern search technique for frequency control of the electric power systemSystem response for test system-II\(\left( {\Delta P_{{D1}} = 0.1p.u.MW\& \Delta P_{{D2}} = 0} \right) \). a ΔF1 b ΔF2 c ΔPtieBack to article page