Power system singularly perturbed discontinuous control

The synchronous generators have a natural different time scale dynamics. That is why for modeling and control design in such systems the methods of singular perturbations are widely used. In this paper the possibilities of sliding mode control design for synchronous generators are analyzed. With this aim the concept of singular perturbation is revised in order to use it for relay control system with a discontinuous slow-motion integral manifold. Obtained results are used for variable structure control of synchronous generator.