Nonlinear dual-excited and steam-valving control of synchronous generators via immersion and invariance
Keywords:Dual-excited synchronous generator, steam-valving control, transient stability, Immersion and Invariance methodology
In this paper, with immersion and invariance (I&I) techniques, a nonlinear dual-excited and steam-valving control of synchronous generators is proposed for the transient stability and voltage regulation enhancement of an electrical power system after the occurrence of a large disturbance. The proposed nonlinear controller is used to not only achieve power angle stability, frequency and voltage regulation but also ensure that the closed-loop system is transiently and asymptotically stable. In order to show the effectiveness of the proposed controller design, the simulation results illustrate that the proposed controller can not only keep the system transiently stable but also simultaneously accomplish the system stability improvement and voltage regulation following temporary faults and permanent faults.
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