Mobile substations are dedicated substations within electrical systems. These compact units organically integrate electrical equipment into one or more semi-trailers. They can replace small substations while providing protective monitoring and remote sensing capabilities. Mobile substations serve as efficient emergency power supply solutions, typically composed of vehicle-mounted modules, electrical equipment modules, and other optional modules. They integrate high-voltage HGIS, main transformers, medium-voltage switches, integrated automation systems, transport vehicle bodies, and other functional units. Characterized by high integration, reliable performance, compact size, and rapid deployment, all pre-assembled, pre-commissioned, and pre-tested equipment achieves operational readiness within hours.