Network loss allocation method and system for power distribution network containing distributed power supplies

The invention discloses a network loss allocation method and system for a power distribution network containing distributed power supplies. Comprising the steps of obtaining a data information linked list according to a power flow result of a node topological graph under all grid-connected distributed power supplies; calculating a power contribution coefficient matrix/or a power drawing coefficient matrix of each pure power supply and/or each pure load to each node in the node topological graph according to the data information linked list; obtaining an occupancy coefficient matrix of each distributed power supply and/or load for each line power according to a proportion sharing principle; and obtaining the total network loss allocation amount of the distributed power supplies and/or loads in the distribution network according to the product of the line active loss in the data information linked list and the occupancy coefficient matrix of each distributed power supply and/or load for each branch. The method