Abstract: In the power grid, when a single main transformer substation or substation operates with a single power supply due to maintenance, fault and other reasons, the event of voltage loss of the whole station due to loss of the mainpower supply may occur from time to time. Professional and technical personnel of State Grid Huangshan Power Supply Company, combining the situation of bus voltage loss load transfer at home and abroad, proposed a scheme of automatic feeder load transfer power supply (bus self-healing) for 10 kV bus voltage loss. The practice proves that the scheme is feasible and can be extended to other power supply companies. Significantly improved customers' perception of electricity use.