Extended noniterative algorithm using the two-axis generator models for transient stability analysis

The conventional time-domain simulation of transient stability requires iterative calculation procedures to consider the saliency of generator. A noniterative algorithm has been successfully developed to take into account the generator saliency exactly with the use of E_q ´-model. This study proposes an extended noniterative algorithm by adopting the two-axis generator model. Given internal voltages and rotor angles of the generators, network voltages and generator currents can be directly calculated by solving a linear algebraic equation, which enables us to reduce the computation time remarkably