The 220kV and below modular intelligent prefabricated cabin substation is a new generation of intelligent substation promoted by the State Grid. It has the advantages of safety, reliability, small footprint, short station construction period, small and exquisite appearance, long service life, no radiation, low noise, and flexible layout. The main transformer adopts the world's advanced products, which are safe, reliable, low-noise, leakage-free, and core-free; there are no exposed conductors or exposed electrical equipment in the entire station, and with good shell protection, the risk of accidental electric shock is eliminated; the entire station has a compact layout, and the footprint and height are reduced by more than 30% compared with civil substations, reducing the occupancy rate of urban space; all equipment in the substation adopts the modular design concept of building blocks, and each module has achieved factory production and prefabricated construction. The on-site civil engineering workload has been reduced by more than 70% compared with conventional civil substations, and the equipment installation workload has been reduced by more than 80%; equipment has been upgraded. There is no need to close the road, and there is no dust and noise pollution during the construction process; the shell can be painted throughout the station, integrating the city theme culture, improving the harmony of urban planning, and integrating with the surrounding environment; the transformer is placed in the prefabricated cabin, and the noise of the substation is reduced to below 40 decibels through firewall technology, sound barrier technology, and electromagnetic shielding technology, meeting the requirements of the city environmental assessment and eliminating noise pollution to the surrounding residential areas; due to the modularization of the substation, it can be flexibly arranged according to the site terrain, fully solving the difficulties of land acquisition, construction, and landing of the substation in the city center, and it is a new model for substation construction. The product can not only be used in the central area of the city to solve the problem of the difficulty of landing of conventional substations, but also widely used in traditional energy industries such as coal and oil, as well as new energy industries such as photovoltaics and wind power. At the same time, with its "building block modular" design, production and transportation assembly mode, it is especially suitable for places such as suburban areas and remote mountainous areas where road transportation is inconvenient.