Fig. 14From: Impact of communication time delays on combined LFC and AVR of a multi-area hybrid system with IPFC-RFBs coordinated control strategyDynamic responses of test system-3 with and without considering AVR coupling and CTDs under the control of DE-AEFA based PID controller: a Δf1; b ΔPtie12; c Δf2; d V1; e V2Back to article page