A new method for generation shedding and load shedding in power system emergency control

摘要

A new method for seeking the scheme of generation shedding (GS) and load shedding (LS) in the emergency control of power system is proposed in this paper. The method is based on the topological and dynamic characterization of stability boundary of nonlinear dynamic system. The validity of control strategies is determined by the projection of the displacement of equilibrium points on the direction of the vertical vector of stability boundary. Furthermore, basing on a power system model considering angle stability and frequency variability, the relation between GS/LS strategies and parameters can be established. Finally, the linearization techniques are used in searching for GS/LS scheme to reduce the calculating burden. The simulation results prove that the method has practicable feasibility for the online construction of emergency control strategies.