Electric power fittings are the link between conductors and transmission towers, and it is essential to improve their ability to withstand damage. In order to obtain the actual load of electric power fittings and study the stress of each electric power fitting under the actual load, a transmission line model of catenary-shaped and an integral model of tension insulator string are established in this paper. Then, conductors with uniform thickness of ice coating and ice shedding process are simulated by changing density method. The results show that the maximum dynamic tension of the conductor of isolated span transmission line is greater than the static tension of conductor icing only when the length of ice-shedding section is small. Under any ice-shedding condition, the maximum dynamic tension of the conductor of multi-span transmission line will be close to or greater than the static tension after conductor icing. When the form conductor tension is loaded on the tension insulator string, it can be found that the most dangerous and secondary dangerous fittings in the tension insulator string are found, and the stress analysis is carried out on the key connecting fittings, which provides a reference for the design and optimization of electric power fitting.
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