Research on Effect of Modified Semi Conductive Material on the Space Charge Behaviour in XLPE

The semi conductive shield material was prepared by mixing a variety of copolymer and carbon black (CB) with LDPE by melt blending method. In order to study the suppression of semi-conductive shield materials on space charge injection, inorganic nano fillers with different properties were added respectively, and the space charge distribution of double-layer sample which was composed of a semi conductive shield layer and a XPLE insulation layer was measured by using pulse electro-acoustic (PEA) method. The results indicate that when various semiconductive shield materials are used, the space charge distributions of XLPE are different. Moreover, the space charge injection from the surface of XLPE can be suppressed by adding nano-MgO and nano-SiC into semi-conductive shield materials.