Design of nonlinear generator exciters using differential geometric control theories

The authors present the design of a nonlinear excitation system for synchronous generators which allows the generators to achieve improved damping performance in voltage dynamics. For illustrative purposes, the proposed control is demonstrated on a simple three-bus system. Designs that use differential geometric control theories, namely, exact and partial feedback linearizing techniques, are considered. The intent is to explore the potentiality of nonlinear exciters; these designs are much different from their linear counterpart