The invention relates to structural modules (10) for the layout of modular power stations (US) of the type used to supply energy in various fields, such as isolated rural communities, mining regions,oil drilling platforms, hospitals, industries, etc.. These structural modules (10) comprise a substation module (20) and a power house module (30) which are essentially formed by platforms (20A) and (30A) provided with spars (20b) / (30b) and crossbeams (20c) / (30c) designed for mounting containment plates (20d) / (30d). Both the platform (20) and the platform (30) comprise interconnection means (MT) formed by zones (40) and tabs (41) provided with perforations (42) for mechanically mounting fastening screws (50), nuts (51) or other suitable elements for interconnecting the platforms (20) / (30) andmounting columns (60), crossbeams (70) and hoisting frame (80), so as to compose a structural framework (AR) that can receive the canopies (CP), hinged doors (PT1) and tilting doors (PT2) and other mechanical structures forming areas (AR) designed for mounting various devices, such as power generator groups, fuel tanks and liquid containment tanks, engines, busbars, etc.. The substation module (20) forms a support base carrying the control panel (PC), the spars (20b) and crossbeams (20c) of which are covered by plates (20d) which, in turn, are attached by welding.