Robust CDA-PIDA Control Scheme for Load Frequency Control of Interconnected Power Systems

Abstract

This paper proposes a robust CDA-PIDA control scheme for load frequency control problem. The proportional integral derivative acceleration (PIDA) controller is a variant of PID and it is used to cope with large overshoot and settling time in higher order systems. The tuning of PIDA controller is based on coefficient diagram algorithm (CDA). The CDA is based on algebraic design approach and it is demonstrated sufficient condition for stability In this paper, CDA-PIDA control scheme is designed for two area interconnected power system. The overall closed loop system stability is guaranteed in case of two area power system because each area CDA-PIDA controller is designed independently. The robustness of the proposed control scheme is demonstrated in presence of parametric uncertainty, load disturbances and physical constraint. The robustness and eminence of CDA-PIDA control scheme is proved through comparison between the CDA-PIDA and recently published control schemes.