Interfacing Synchronous Machine Model Including Stator Transients With Network for Stability Studies

A detailed multi-time scale model of synchronous machines (SM) with stator transients is necessary to capture the complex interactions in inverter-integrated power systems. The conventional detailed SM model, including stator transients, is incompatible with that of the step-up transformer in the dq domain as both are modeled as current sources in series. This letter proposes an efficient approach for interfacing the detailed SM model with the transformer by reformulating the SM model as a voltage source without accuracy loss. MATLAB/Simulink numerical simulations using New England 39-bus test system validate the computational efficiency of the proposed approach.