ML-FEM coupled model based transient simulation of stator ground fault generators

It has been widely recognized that stator ground fault occurs in generators with a relatively high probability. Hence it is of great significance to investigate the simulation model, and moreover, to predict the transient behavior of this type of fault, as would provide the fundamental guidelines for the corresponding effective protection scheme. This paper puts forward the ML-FEM coupled model for analyzing the transient behavior of stator ground fault in generators, which possesses the distinguished capability to accurately take account of not only the distributed capacitances of the stator windings to the ground, but a variety of generator nonlinearities. The numerical simulation of stator ground fault in generators, along with the related experiments, has been completed. The simulation and experiment results explicitly demonstrate that the ML-FEM coupled model is superior to the ML model presented previously, and more preferable for transient analysis of stator ground fault in generators. As paves the way to develop and improve the relay protection scheme against this type of fault