Model Predictive Control for Load Frequency Regulation in Power Systems Using a Disturbance Observer

AbstractPower systems experience high load frequency changes as a result of increasing renewable energy additions and fluctuating demand levels. Model predictive control (MPC) for automatic generation control (AGC) in power systems is proposed using an observer for nonlinear disturbances (NDO). Load disturbances and un-modeled nonlinearities which adversely affect the output prediction in MPC are considered as a net disturbance, and it is estimated using a NDO. An offset-free MPC control law is obtained by optimizing the receding-horizon stage with the predicted disturbance. Power systems with single-area and three-area distribution are subjected to this proposed approach of frequency regulation, which has been shown to be effective in simulations.KeywordsAGCLoad frequency regulatorModel predictive controlDisturbance observer