Nonlinear governor control for hydroturbine generator sets

A new methodology based on nonlinear geometric control theory to obtain a nonlinear governor control strategy of a hydroturbine generator set is presented in this paper. A nonlinear mathematical model is set up. The nonlinear governor control law for a hydroelectric plant is acquired by using the technique of the exact linearization via feedback of an affine nonlinear control system. The validity of the proposed design approach is manifested by digital simulation results. Moreover, the digital controller to implement the control strategy has been made up by utilizing the single chip microprocessor 8098 system. The significant effectiveness of the controller is verified by the results of the physically dynamic simulation. It can be seen that the nonlinear control of the water valving in a hydroturbine generator set is very effective for enhancing the large disturbance stability and especially for enabling the resynchronization of the generators after losing the stability of a power system.<>