Apparatus and method for high power DC transmission

摘要

It is a device (1) for DC transmission with a superconducting transmission line (3,3a), wherein the transmission line (3) - a vacuum-insulated sheath (13) for thermal separation of a radially inner portion (9) of the transmission line (3) of a outer environment (15) and - a plurality n superconducting conductor wires (5) which are arranged together within the vacuum-insulated sheath (13), - wherein the device (1) at least a number n of power converters (6a, 6b), wherein each of the superconducting conductor cores (5) or each group of combined conductor cores (5) is assigned at least one power converter (6a, 6b), and wherein the device (1) is configured to carry a plurality of conductor cores (5) guided together within the sheath (13) ) are supplied with a direct current from one another with the same polarity. Furthermore, a method for transmitting direct current is specified with such a device characterized by the step of feeding current of the same polarity into a plurality of conductor wires (5) of the superconducting transmission line (3) guided within the common sheath (13).