mobile substation is an effective emergency power supply equipment. It is a small substation that organically integrates and installs the electrical primary and secondary equipment on one or more semitrailers. It has the characteristics of complete functions, small land occupation, flexibility and wide application scenarios. It can provide temporary, phased or emergency power supply.If the substation is upgraded and put into operation instead of the transformed equipment, the power outage time can be greatly shortened; High load seasons or periods, large-scale temporary activities, large-scale project construction, etc. to alleviate the shortage of power supply in local areas; In case of natural disasters, the substation equipment is seriously damaged, and the mobile substation can replace the whole substation and quickly restore the power supply; Areas beyond the pre power construction planning, such as the phased temporary construction power supply of the new industrial park, shall be put into operation as a temporary substation to alleviate the tension of power supply and avoid the tedious change of planning.