Model order reduction of two area hydropower system using mixed method

Abstract

The complexity of power system models used for operation and control analysis has been increasing due to their operation in interconnected fashion. This paper presents a novel approach to develop reduced-order models of complex and large interconnected power system models by using mixed method of model order reduction technique. A state-space model of automatic generation control (AGC) system of a two-area interconnected power system model consisting of hydropower plants is developed. It is an original system of 11th order which is approximated to a reduced model of 3rd order. Validation of reduced-order model is done by comparing step response of original model with reduced-order model. The investigations of step responses show that the 3rd-order model is a good approximation of original model as far as its dynamic responses are concerned.