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Wan Dai,Qi Fei,Zhou Quan,Zhou Hengyi,Zhao Miao,Duan Xujin 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
This article presents the eff ect of thermal aging on threshold fi eld strength and relative permittivity of cross-linked polyethylene (XLPE) with diff erent cross-linking agent contents. Here, low-density polyethylene (LDPE) and dicumyl peroxide (DCP) are used as basic experimental material and cross-linking agent, respectively. Eventually, experimental results indicate that thermal aging can gradually make threshold fi eld strength and relative permittivity of XLPE with diff erent DCP contents increase and decrease, respectively. Besides, threshold fi eld strength of XLPE with diff erent DCP contents increases fi rst and then decreases as the increase of DCP content, while relative permittivity of XLPE with diff erent DCP contents decreases fi rst and then increases as DCP content increases at diff erent thermal aging time, etc. These studies in this article are the basis of the research on space charge accumulation and dissipation inside XLPE materials, which are of great signifi cance to the normal operation of XLPE cables.