An ANN-based network equivalent approach for power system on-line voltage security assessment

An artificial neural network (ANN) based external system equivalent approach is proposed for the online voltage security assessment of power systems in this paper. The proposed equivalent model is simple and can meet accuracy, computational and topological requirements. It has the ability of being updated by using ANN and may be used in real-time. Test results demonstrate that the new equivalent model is promising for the contingency analysis of power systems.