Construction of a Novel Insulation State Evaluation System for XLPE Cable

The continuous rapid growth of national economy keeps improving the requirement of our electric power infrastructure. The cross-linked polyethylene (XLPE) cable with good insulation and transmission performance has become the mainstream configuration of urban electric power equipment. Based on the existing research on the causes of cable insulation aging, this paper determines the evaluation parameters reflecting the influence factors of aging, aiming at establishing a novel XLPE cable insulation evaluation model system. According to the linear regression equation, the factors that have little influence on the cable insulation are excluded, the weight vector of the main influencing factors is determined based on the entropy weight method, the weight is tested by the principal component analysis method, and the weight of the parameters affecting the insulation state of XLPE cable is calculated by the TOPSIS method. Finally, the evaluation system is formulated and the suggestions for cable stability maintenance are given.