Generator Stator Winding Single-phase Ground Fault Digital Simulation Of Traveling Wave Positioning

With the development of country's economy and the improvement of national living standards, the requirements of the power quality is also rising. The reliability of power system directly affects people's lives and industrial production, the interruption of electricity supply will lead to social losses. With the development of power construction, large generator has become a major part of electricity production, of its reliability and security has an important impact to the safe of power system, and directly related to the production of social and people's lives. So it's very important for large generator to have a reliable protection. However, it still exist some problems in the protection for generator because the characteristics of generators. In a variety of generator failure, the generator stator winding single-phase ground fault is common. For the large generator, the neutral point is usually of non-grounded or high resistance grounded through distribution transformer, so the fault current of generator stator winding single-phase ground fault is not big, the damage to stator is small. However, single-phase ground fault of stator winding will develop into inter-turn short circuit or phase-to phase short of stator winding that has a more dangerous. So it is very important for single-phase ground fault protection of stator winding. This paper use hydrogenerator, reference the thought of multi-loop method and distributed parameter model of stator winding, establish simulation model of stator winding of hydro-generator in EMTDC. Simulation with this model, explore the application of traveling wave in the location to stator winding single-phase ground fault.