Patent ID: 7102257

Claim:
A submarine cable power feeding system comprising: N (N is an integer greater than or equal to 2) main column submarine cables extending from land in the offshore direction; M (M is an integer greater than or equal to 2) stages of submarine feed branching devices, each of which is connected to an Nth main column submarine cable to receive constant-voltage power from a constant-voltage feed unit or a previous stage submarine feed branching device; and first to Mth rows (M is an integer greater than or equal to 2) of sub submarine cables, each of which connects an Mth-stage submarine feed branching device to other Mth stage submarine feed branching devices through submarine repeaters, wherein each submarine repeater receives power from a constant-current feed unit built into an Mth stage submarine feed branching device, wherein the submarine feed branching devices and the submarine repeaters are arranged in a matrix configuration on a plane.