(in lingua inglese)
In this paper, a Differential Evolution (DE) algorithm optimized fuzzy PID controller has been proposed for Automatic Generation Control (AGC) of multi-area multi-units power systems. Initially a multi-area multi-units power system with the considerations of physical constraints such as GRC and time delays is considered and the superiority of DE over GA is demonstrated. A linear incremental model for a TCSC has also been developed which is suitable for AGC applications.