Abstract：In view of the difficulty in selecting the type of substation post porcelain insulators in the area of frequent seismic activity, the models of post porcelain insulators with variable-diameter and tower-type are established in this paper. The effects of horizontal seismic force, natural wind load and bending strength on the mechanical properties of post porcelain insulators are analyzed. The total bending moment and the corresponding safety factor of the post porcelain insulator are calculated accurately. The results show that although the wind force has some influence on the structural strength, it is far less than the horizontal seismic force and bending strength. Compared with variable-diameter post porcelain insulators, tower-type post porcelain insulators exhibit higher seismic stability because their center of gravity is closer to the bottom. The results can provide theoretical guidance for the selection of post porcelain insulators in the construction of substations in seismically active areas, thus ensuring the safe and stable operation of power facilities under extreme natural conditions.
2024, Vol. 25 
