Stress Simulation Study on a Novel Combination String of Transmission Line Insulators

The insulator string mainly plays a role of fixing wire and preventing the current from returning to the ground in the power transmission and transformation project. In order to compress the corridor width of the transmission line and make it convenient for breaking line, we proposed a novel structure in which the V-type fittings and the tensile insulator string are optimally combined. In this paper, the mathematical model of mechanical analysis for the structure is established. According to the equilibrium conditions of space force system, the factors affecting the stress of the structure are analysed. In addition, a simulation model is built in the finite element analysis software. The stress distributions of the new structure by setting two installation angles are calculated and the special parts with weak mechanical properties in the new structure are explored based on the generated stress cloud diagram. We compare the maximum value of the von Mises equivalent stress in the two arrangements. A conclusion of better than 45° at a mounting arrangement angle of 50° was obtained. The research results provide a theoretical reference for further optimization design and installation of the combined structure in the future. (paper)