Abstract: Aiming at the problem of large construction quantity and uneven construction quality of the existing prefabricated substation, the equipment integration, structure layout, prefabricated cable and alignment of the prefabricated substation was studied; the comparison of prefabricated building materials polyurethane composite board and ALC was analyzed, the assembling method of polyurethane composite board was listed, the prefabricated substation was proposed, which based on modular base integrated with primary and secondary equipment and prefabricated cable, modular polyurethane composite board as enclosure structure. The design scheme and construction technology of foundation and building of prefabricated substation were given. The scheme was verified in the practical engineering application. The results indicate that this prefabricated substation can achieve the integration of switching equipment, reduce the scene and cabinet, wiring and other processes, increase by 42% in construction speed compared with conventional prefabricated substation, and avoid onsite wet operations, improve the construction quality. It can be used for reference application of prefabricated substation in the future.

Key words: prefabricated substation; modular base; polyurethane composite board