MULTIVARIABLE NONLINEAR CONTROLLER FOR A SYNCHRONOUS GENERATOR

The problem of multivariable controller synthesis for a turbogenerator is considered. Using the feedback linearization approach for multi-in put non-linear systems, the existence of a linearizing state feedback for the improved reduced-order model of a turbogenerator is proved and the simplest form of this feedback is derived. Application of the obt ained non-linear controller to the multivariable control of a turbogen erator provides very good results not only for the reduced-order model but also for the 'exact' (Park's) model of a turbogenerator. Simulati ons of fault and post-fault conditions in the obtained non-linear cont rol system confirm its superiority over a system with a voltage regula tor and power system stabilizer.