Influence of material volume conductivity on electric field and surface charge of RIP valve-side bushing core under DC electro-thermal coupling stress

Modifying the volume conductivity of resin impregnated paper (RIP) material is a promising way to eliminate the electric field and the surface charge along the RIP valve-side bushing core surface. In this paper, an electro-thermal coupling model is established based on the geometry of a ±200 kV RIP valve-side bushing and the conductivity of RIP material taken from cuts of an actual bushing core. The influence of volume conductivity of RIP...