Application Of Predictive Control In Nonlinear Excitation Control Of Synchronous Generator

Along with the advancement of society and the development of science, the scale of power system is bigger, several wide range accidents of power system occurred in the past few years. Among most of the measures, the excitation control of power system is one of the effective measure in improving stability of power system. So in this paper, a way which applies the predictive control theory which has an good effect to nonlinear system to the generator control is proposed to improve the effect of excitation control and to enhance the safety and stability of electric power system.Based on the development and actuality of power system excitation control, aiming at the nonlinear characteristics of synchronous generator excitation control system, combined with the predictive control basic principle,on the basis of the Model Algorithmic Control, The paper presented a ecumenical common nonlinear predictive control law, which is based on Taylor progression has acquired. In the further research, aiming at enlarging the volume of information and changing the process way of prediction model, the paper presented the nonlinear predictive control law which is based on ADAMS predictive. Aiming at nonlinear system which is use terminal voltage deviation as output function, and on the condition of single-machine infinite-bus power system. the above-mentioned control law are applied to design the excitation control for torque-synchronous generator.In order to not only improve predictive precision of the terminal voltage of generator, but also effective improve the stability of the generator unit, and coordinate the dynamic and the steady-state performance of various state variables of the system. The paper selects the output function as combination of the multiple state variables, and then deduces the predictive excitation control laws.