Abstract:

When single-phase ground fault occurs in the neutral indirectly grounded system, more than 80%of the associated ground arc fault is introduce. Fault Arc is random, and change with the change of the surroundings. Arc is discussed simply in the theoretical analysis, and focused on the arc simulation model. Arc grounding fault model which the live interference is considered, is built in the EMTP/ATP. The model breaks the traditional ideal model, provides data support for the fault line detection in neutral point non- effectively grounded-system, and lays a solid foundation for the follow-up study.

Key words: Neutral un-effectual grounded system, Arc fault, EMTP/ATP, Simulation model