NONLINEAR CONTROL METHODS FOR POWER-SYSTEMS - A COMPARISON

The design and performance of two nonlinear controllers for power syst ems is explored in this paper. The designs are based on nonlinear disc rete-time predictive control and feedback linearizing control, conside ring a simplified nonlinear single-machine, infinite bus (SMIB) power system model equipped with a series-capacitor controller. Simulations are presented for nonideal conditions such as bounded control, the unc ertainties in the chosen model parameters, and the presence of inter-a rea-type persistent disturbances, The results indicate that superior p erformance can be obtained using the nonlinear predictive controller w hen compared with the feedback linearizing controller and a standard l inear quadratic regulator.