A novel transient stability analysis method for multi-machine system

Development of a WAMS based test platform for power system real time transient stability detection and control

“…Based on the OMIB system, three indexes are calculated by Eqs. (17,18,19,20 and 21) including the convexity index in the phase of angle-angle acceleration (K 1 ), the convexity index in the phase of unbalanced powerangle (K 2 ) and the changing rate of the unbalanced electric power (K 3 ). When these three indexes are positive at the same time, the system is considered as transient instable.…”

“…5. Single generator energy function based detection module A transient energy changing rate based transient instability detection method was proposed in reference [17]. It identifies the most severely perturbed generator based on relative kinetic energy of generators and electric power reflecting the change of power system.…”

“…Various generator power angle prediction techniques [11][12][13][14] and different transient instability detection technologies [15][16][17][18] were proposed. Reference [15] proposed an emergency EEAC based transient instability detection technique by using the measured trajectory.…”

“…Reference [16] proposed a transient instability detection criterion based on the geometric feature of phase plane trajectory. Reference [17] proposed a transient instability detection technology by means of the transient unbalance energy variation rate of the most seriously perturbed generator. Reference [18] proposed a transient instability detection criterion based on perturbed voltage trajectory.…”

Real-time transient instability detection based on perturbed voltage trajectories

“…On the basis of the aforementioned studies, Reference investigated the impacts of time‐varying parameters and proposed added criterion of imbalanced power to improve the feasibility of GCPT. As defined by transient energy function in , Reference proposed a multiswing stability assessment method based on the transient energy gradient. This method detected the transient stability of the whole network by analyzing the severely perturbed generators.…”