Effects Of Aromatic Compounds On The DC Dielectric Properties Of XLPE

Due to high transmission capacity?simple controlling of transmission direction and magnitude?high stability?less investment?the ability to connect asynchronous grids and many other advantages,HVDC transmission are getting more and more attention.With the increasingly maturity of the flexible HVDC technology,the application of XLPE insulated high voltage direct current cables has increased rapidly.Currently only Borealis company has developed HVDC XLPE cable insul-ation material through organic chemistry modification methods and also realized in-dustrialization and large-scale applications.Markets and prices have been basically monopolized by them.There is important academic significance and application va-lue,the research to improve the method and mechanism of the dielectric properties of XLPE DC and to promote the use of cross linkable polyethylene insulating material made of the early realization of HVDC cable.In this paper,as the matrix resin made of low density polyethylene,prepared aromatic compounds modified composite media by melt blending,Suppress sample by use of the plate vulcanizing machine,test DC breakdown characteristics,the conductivity characteristics and distribution of space charge,and study the factor to influence law and mechanism of aromatic derivatives/XLPE dielectric properties.The results show that Aromatic derivatives selected by this paper can improve significantly XLPE DC breakdown strength,and not easy to separate out from the XLPE,has valuable of practical application;the adding of aromatic derivatives have a significant effect on the electrical conductivity of XLPE,greater impact at high temperatures;Adding moderate amount of aromatic compounds can inhibit the inje-ction of space charge in XLPE.