The invention relates to a live-
line switching method for a
bus operation mode of a distributed substation, and belongs to the technical field of power transformation and
distribution system operation. According to the technical scheme, when a switch of a 10kV
bus coupler cabinet of a 110kV
transformer substation is located at a switching-on position, and a 10kV
bus coupler cabinet trolley and a
bus coupler lifting cabinet trolley are both located at operating positions, a first power supply incoming line and a switching-on locking loop of a
bus coupler cabinet and a second power supply incoming line and a
bus coupler cabinet of each distributed
transformer substation are shielded, and three-throw three-
loop closing is achieved; therefore, live-
line switching of the bus operation
modes of the distributed substations is realized. The
system has the advantages that the risk of substation circulation caused by manual misoperation is fundamentally avoided, the stability and accuracy of
signal transmission are effectively guaranteed by adopting a multi-node
signal transmission mode, potential safety hazards caused by
signal problems are reduced, power failure is not needed when operation
modes of all distributed substations are switched, and the
system is safe and reliable. The power failure time and the power failure frequency are reduced, the power supply reliability is improved, and normal power utilization is effectively guaranteed.