Towards detection and control of Hopf bifurcation in electric power system

To enhance the computational efficiency of dynamic stability analysis, the Quasi Steady-State (QSS) model was proposed, yet it was later shown that the QSS model might fail to capture instability of the complete dynamic model. To deal with the issue, a hybrid QSS model has been proposed to ensure both the accuracy and efficiency of dynamic stability analysis. In this paper, we show that the failure of the QSS model provides important insights on designing control such that an intuitive yet effective emergency control is designed and integrated into the hybrid QS model to delay the occurrence of Hopf bifurcation and hence make the system oscillation-free.