Modified Artificial Bee Colony based on Multi-Stage Fuzzy Load Frequency Control in Deregulated Environment

Abstract

A Modified Artificial Bee Colony is presents this paper to solve the Load Frequency Control (LFC) problem of power systems in deregulated environment, which called Interactive Artificial Bee Colony (IABC). In this paper a new strategy of controller is proposed which is named Multi-stage Fuzzy (MSF) controller based. LFC problem are caused by small load perturbations, which continuously disturb the normal operation of power system. The objectives of LFC are to minimize the transient deviations in these variables (area frequency and tie-line power interchange) and to ensure their steady state errors to be zero. In the proposed controller, the signal is tuned online using the knowledge base and fuzzy inference. Also, to reduce the design effort and optimize the fuzzy control system, membership functions are designed automatically by the proposed IABC method. Obtained results from the proposed controller are compared with the results of several other LFC controllers. These comparisons demonstrate the superiority and robustness of the proposed strategy.