Transient Stability Enhancement and Voltage Regulation of Power System Using Input-Output Linearization Feedback Technique

To maintain a high degree of reliability, the effect of major disturbances, such as a large sudden fault, must be considered in power system design. The problem of designing controllers to prevent an electric power system losing synchronism after a large sudden fault is of great importance in power system design. 'Me usual stabilizer designs based on approximate lineariztion models are not adequate for large disturbances. When a large fault occurs, the behavior of the system changes a lot and many cases a linear controller can not maintain adequate stability.In this paper, by using the Input-Output Feedback Linearzation technique and Asymptotic Output Tracking a novel excitation controller is given. We concentrate on improvement of the transient stability and voltage regulation of a single machine-infinite bus power system under the effects of a symmetrical 3-phase short-circuit fault.The simulation results show that the power system can keep transiently stable and achieve ood post fault voltage regulation with nonlinear controller.