Abstract: Use the composite post insulator to replace the substation frame angle steel lattice, and the electrical insulation path is changed from suspension insulator to horizontal composite post insulator, to reduce the structural height and building area of substation frame. The specific scheme includes butt four composite post insulators with the hanging plate through the flange, and the conductor relates to the substation frame through the hanging plate. Composite post insulator, as a structural load-bearing part and electrical insulation component, reduces the number of steel frame elements compared with the traditional lattice beam. The mechanical analysis of the new frame model is carried out by Workbench. The analysis results show that under the same load cases, the new frame has good mechanical properties, and the composite post insulator has good adaptability in the substation frame. Finally, the feasibility and rationality of the new frame design are verified by mechanical and electrical tests. The research results show that a new substation frame reduces the weight of the substation frame and the height of the conductor hanging point, reduces the substation building area, has obvious promotion benefits and has broad application prospects.

Key words: composite materials, substation frame, structural design, numerical simulation