Abstract
The purposed work is the design of a nonlinear voltage and rotor angle controller to improve the stability properties of a system which comprises a synchronous generator connected to an infinite bus and hydraulic turbine. The controller is based on the feedback linearization scheme. The advantage of this systematic nonlinear controller design is that the control system is liberalized in a wider domain. A linear control can then be used to stabilize the linear system. The performances of the linear voltage and rotor angle regulators are compared with those of the standard linear voltage and speed regulators in the presence of short circuits at the generators. The infinite bus and the non- linear regulator improved considerably the stability and the transient dynamic performance of the generator.
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