Spare-power automatic switching implementation method of lines under wiring and operating modes of self-adaptive 330kV substation

The invention discloses a spare-power automatic switching implementation method of lines under wiring and operating modes of a self-adaptive 330kV substation and belongs to the technical field of power systems and automation. The spare-power automatic switching implementation method disclosed by the invention has the advantages that before the line spare-power automatic switching implementation is switched on, a switch at the mediate-low-voltage side of a transformer is firstly inter-tripped, and after the spare-power automatic switching charges for a main transformer successfully, the switch at the medium-low-voltage side is switched in a step-by-step manner and a time-delay manner, so that the influence of direct-switching spare supply lines on protection to the main transformer and stress damage to a transformer body is reduced; the ratio between the cross-section power of main supply lines and the heat stability power of the spare supply lines before breakdown is utilized to intelligently ...