Control of Hopf bifurcation in multi-area power systems via a secondary voltage regulation scheme

This paper presents and discusses a methodology to include in the power system security assessment and control functions a module to deal with oscillatory phenomena, namely Hopf Bifurcations. The proposed procedure is based on the computation of sensitivities of the distance of an operating point of interest to the Hopf Bifurcation in the parameter space, and considers as control variable the pilot busbar voltage of the eventual Secondary Voltage Regulation scheme. A criterion is presented to deal with the problem in a multi-area scenario. The bifurcation diagrams are obtained directly from the DAE system. Numerical results are presented for the New England test system, demonstrating the potentiality of the proposed methodology on the Hopf Bifurcation control.