The utility model discloses an it concentrates power supply system to exchange frequency conversion rig batch production operation, including a plurality of generating set, every generating set exchanges female arranging through a generator control cabinet with 600V separately and is connected, exchanging female arranging, 600V still be connected with a plurality of rectification cabinets, a plurality of interchange 600V power supply cabinet and a plurality of 600V400V transformer on, all rectification cabinets are common to be connected with female the arranging of 810V direct current, and the 810V direct current is female to be arranged and be connected with a plurality of direct current 810V cabinet of supplying power, and the electronic mechanism that every direct current 810V supplied power cabinet and a rig is connected, every electronic mechanism that exchanges 600V power supply cabinet and a rig is connected, all 600V400V transformers exchange female arranging with 400V jointly to be connected, and 400V exchanges female arranging and is connected with a plurality of interchange 400V power supply cabinet, and every exchanges 400V power supply cabinet and is connected with the stand -by motor of a rig. The utility model has the advantages of simple structure, the reliable operation.