MULTI-MODEL BASED INTERNAL MODEL CONTROLLER DESIGN FOR LOAD FREQUENCY CONTROL WITH UNCERTAIN COMMUNICATION DELAY

Abstract

Electrical Power System is a vital part of today’s society that distributes electrical energy all around the world. This system powers every sector of society, from medical, educational and business institutes to enormous industries and daily households. Disruptions in this operation is very severe, and in worst cases, fatal in many situations. The vast interconnections of this system are prone to performance depreciation or halt of operation due to sudden changes in loads connected, perturbation of working parameters, effect of environmental phenomenons and numerous other factors. Thus, proper control during the operation of LFC is a crucial task. Modern controller designs and remote controlling units introduces communication delay during operation in the system. In this thesis a Multi-Model based Internal Model Controller for LFC is proposed. This controller design is proposed for load variations and disturbance rejection in LFC system in presence of uncertain communication delay. The controller performance in closed-loop is compared with other controller structures [1]. The performance is evaluated on the parameters of integral square error (ISEr), integral absolute error (IAEr), and integral time absolute error (ITAEr).