A Method to Improve the Synchronous Machines Equivalent circuits

In this Paper, we present a systematically method based on the transformer coupling effect to establish the d-and q-axes equivalent circuits, which can describe the transient behavior of the synchronous machine. The MATLAB/Simulink Power System Blockset tools (PSB) is used for the simulation of synchronous machines by their equivalent circuits. One used an empirical method, based on the comparison between the practical and numerical results, to elaborate an improved synchronous machine model during dynamic behaviors.