A Variable Structure Adaptive Fuzzy Logic Stabilizer for a Two Area Load Frequency Control Problem

摘要

This paper presents a variable structure adaptive fizzy logic control approach for designing a decentralized controller for load frequency control of interconnected power areas.The proposed variable structure adaptive fuzzy logic load frequency controller (AFLFC) is designed to improve the dynamic performance of the frequency and tie line power flow under a sudden load change in the power areas.The AFLFC provides a stabilizing signal to work in conjunction with the original integral controller.The effect of generation rate constraint (GRC) for both areas has been considered in the controller design.Time-domain simulations using is performed to demonstrate the effectiveness of the proposed AFLFC.The simulation results show that the proposed AFLFC provides good damping and reduces the overshoot of the different area frequency deviations and also reduces the interchanged tie power.