Robust LFC in deregulated environment: Fuzzy PID using HBMO

In this paper, a Honey Bee Mating Optimization based Fuzzy (HBMOF) controller is proposed for solution of the Load Frequency Control (LFC) problem in a restructured power system. In the proposed method, for achieving the desired level of robust performance, exact tuning of the PID parameters is very important. Hence, to reduce the design effort and find a better fuzzy system control, PID parameters are designed automatically by HBMO. Using this algorithm leads to high speed to algorithm's convergence and more flexible controller. The effectiveness of the proposed method is demonstrated on a deregulated power system with possible contracted scenario under large load demand and area disturbance in comparison with the PSO, GA fuzzy controllers through ITAE (Δp), ITAE (Δf) and FD performance indices.