Modeling of Air-gap Flux Inside of Generator for Fault Location

Abstract

This paper deals with theory construction on a novel fault location method using air-gap flux distributions of a synchronous generator connected to a power system. Air-gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and field current at fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air-gap fluxes. Therefore, air-gap fluxes can be utilized to locate fault. To verify the validity of theoretical formula, we compared to the experiment result of the air-gap flux distributions.