110~220kV XLPE power cable has been an important component of the power system. XLPE power cable has many advantages, such as excellent dielectric properties and heat resistance, large transmission capacity, light weight, simple structure of cable terminations, and facilitated installation. With the development of power grid and the needs of urban power network renovation, the proportion of XLPE cable lines is increasing in power system. But its failure would cause huge economic losses and serious social im...