Transient Simulation of Synchronous Generators Using Time-Stepping FEM

This paper presents a time-stepping finite element model of a turbo-generator connected to infinite bus via a transformer with delta-star wiring, in which the core saturation, variation of speed and effect of AVR are taken into account. Using this model, various transient process are simulated including short-circuit fault occurrence near the transformer terminal or on the transmission line, clearance of the fault and reclose. The simulation using three generator models, the time-stepping finite element model, linear Park equations and saturation Park equations are compared in the three-phase short circuit fault simulation. The result shows that the power angle stability is increased using the FEM model compared with the other two models