A time domain model for transient simulation of synchronous machines using phase coordinates

This paper presents a synchronous machine model for transient system analysis with trapezoidal and Euler methods. The model uses phase coordinates for stator windings coupled with excitation and damper windings. The phase representation allows the integration of synchronous machines parameters in the power system network Y_BUS matrix. Such matrix allows the simultaneous solution of the machines and the network nodal equations in the time domain. Non linear phenomenon such as saturation effects can also be incorporated and require a few additional iterations. Simulation time can be reduced further for large systems by using decoupled resolution and prediction techniques on the machine current