The partial discharge intensified and cracking caused by the bending deformation of dry cable terminal in Bo-shaped cable down-lead layout have been reported

but the quantitative calculation and correlation analysis of bending deformation

stress and electric-field intensity haven’t been systematically studied. In this paper

according to the characteristics of Bo-shaped cable down-lead layout

the bending angle was defined and the mathematical models for calculating the bending deformation and stress of the cable terminal were derived. Furthermore

the mathematical model for calculating the electric-field both inside and outside the cable terminal was set up along its bended path. And the simulation analysis was carried out with the YJLW03

-Z64/110 kV 1×400 mm

2

dry cable terminal. The research results show that

with the increase of the cable bending angle

the maximum shape is variable and the maximum internal stress of the cable terminal increases. The maximum stress of each dielectric material at the maximum deformation increases significantly. Besides

the electric fields inside the cable terminal and at the tip of the umbrella skirt also increase

especially

the increment at the tip of the umbrella skirt is remarkable. Through the conjoint analysis of mechanical and electrical characteristics

the limit value of bending angle of dry cable terminal in Bo-shaped cable down-lead layout is suggested as 5°.