Load frequency control with fuzzy-PID controller under restructured environment

This paper presents the simulation of multi area multi source restructured power system for Load Frequency Control (LFC). Initially, a more practical multi area diverse source power system with the consideration of non-linearities such as Time Delay (TD) and Generation Rate Constraint (GRC) are considered. PID controller with derivative filter (PIDF) is evaluated to solve the LFC problem. Each generating source is provided with different controller which gives better control action and hence better dynamic performance of the system. The gains of the PIDF controller are optimized using an Integral of Time multiplied by Absolute value of Error (ITAE) criterion employing of Differential Evolution (DE) algorithm. Finally, Fuzzy-PID controller with derivative filter coefficient (Fuzzy PIDF) is proposed and better dynamic performance is obtained compared to PIDF controller.