Modeling and experimental analysis of arc high resistance grounding fault of distribution network

Abstract

The distribution network environment in forestry and pastoral areas is complex and changeable, which is very easy to cause arc high resistance grounding faults, resulting in large-area electrical fires. However, arc grounding faults are mostly random, and the traditional analysis methods are difficult to describe their development process. Aiming at this problem, the arc high resistance grounding fault model was established and the actual arc fault experiment of distribution network was carried out in this paper. Through the arc fault experiment in wet grassland, dry grassland, trees and other environments, the development process of arc fault in distribution network in forest and pastoral areas was simulated. Through the analysis of experimental data, the influence of contact humidity, fault current, transition resistance and other factors on electrical fire was analyzed. The test results show that the high resistance grounding fault of branches has a development process.