An Enhancement Technique for Transient Stability Analysis of large-scale Power Systems

This paper presents a new technique for enhancement oftransient stability analysis of large-scale power systems through integrated electromechanical equivalent and dynamic load aggregation. Various degrees of power system reduction models are compared through transient stability simulations to evaluate the confidence level in the proposed technique. The proposed power system reduced model can represent effectively the dynamic and steady state states ofthe original power system with dynamic loads represented by induction motor third-order model. The proposed integrated reduction technique is applied to 39-bus, 10 generator NPCC system that feeds, at bus 38, a dynamic load subsystem consists of 5-induction motors interconnected by a network. Transient stability evaluation of the proposed integrated reduction technique shows excellent agreement between the responses of the original system and its proposed reduced model.