Potential and Electric Field Simulation Study of Composite Insulators with Shed Damage Conditions

In order to research the influence of different composite insulator shed damage degrees and locations on electric field and potential distribution, taking insulator type FXBW4-10/70 as research objective, utilizing finite element method to established simulation model, calculates the corresponding electric field and potential along insulator surface and dry arc path. The result shows that the potential distribution of low voltage insulator shows a ladder- shape downward trend; The maximum electric field intensity along the surface occurred on the tip of shed at the high voltage terminal, the field intensity was affected by the sharpness of insulator surface; At the junction between the shed and cylinder, there will be a partial increase of electric field, In the analysis of different damage locations, when the root of shed is damaged the electrical field distortion will be severe, as the maximum electric field of surface is bigger than sophisticated part damage and middle part.