There is set forth herein a superconducting lead assembly comprising: a positive superconducting wire; a negative superconducting wire, wherein the positive superconducting wire is configured to conduct inflow current to a cryogenic apparatus and wherein the negative superconducting wire is configured to conduct outflow current away from the cryogenic apparatus; and an electrically insulating separator, wherein the positive superconducting wire and the negative superconducting wire are arranged proximately one another and on opposite sides of the electrically insulating separator for cancellation of electromagnetic forces attributable to current flowing simultaneously in opposite directions within the positive superconducting wire and the negative superconducting wire, and wherein a length of the superconducting lead assembly is flexible. In one embodiment the positive superconducting wire and the negative superconducting wire can include high temperature superconducting (HTS) material.

The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

The invention specifies a termination (1) for a superconducting cable (2) which is arranged in a tubular cryostat, which serves for carrying a coolant, and has at least one electrical conductor. The termination (1) has an inner sheath (3), in which one end of the cable (2) is arranged in a coolant, and an outer sheath (4), wherein the sheaths (3, 4) are composed of electrically insulating material and insulating material is arranged in an existing intermediate space (5) between the inner and the outer sheath. The inner sheath (3) is connected to the cryostat, and the termination (1) is arranged vertically in the assembly position such that a lower part (C) of the inner and the outer sheath (3, 4) is connected to earth and an upper part (A) of the inner and the outer sheath (3, 4) is connected to high-voltage potential in the operating state. At the respective upper end, the inner sheath (3) is closed off by a first bursting disc (3a) and the outer sheath (4) is closed off by a second bursting disc (4a).

An interconnect may have a first end coupled to a superconducting system and a second end coupled to a non-superconducting system. The interconnect may include a superconducting element having a critical temperature. During operation of the superconducting system and the non-superconducting system, a first portion of the interconnect near the first end may have a first temperature equal to or below the critical temperature of the superconducting element, a second portion of the interconnect near the second end may have a second temperature above the critical temperature of the superconducting element, and the interconnect may further be configured to reduce a length of the second portion such that temperature substantially over an entire length of the interconnect is maintained at a temperature equal to or below the critical temperature of the superconducting element.

A combined electrical power and hydrogen energy infrastructure includes a superconducting electrical transmission line. One or more fluid paths are adapted to cool one or more superconductors of the electrical transmission line to a superconducting operating condition and to deliver hydrogen in a liquid state. The combined electrical power and hydrogen energy infrastructure also includes a supply apparatus to pump hydrogen into the one or more paths and to cool and pressurize the hydrogen to maintain the hydrogen in a liquid state. A distribution apparatus is operatively coupled to the one or more fluid paths at a different location along or at an end of the electrical transmission line to draw off the hydrogen for distribution of the hydrogen for use as a hydrogen fuel. An electrical transmission line and a method for supplying a fluid via an electrical transmission line are also described.

A combined electrical power and hydrogen energy infrastructure includes a superconducting electrical transmission line. One or more fluid paths are adapted to cool one or more superconductors of the electrical transmission line to a superconducting operating condition and to deliver hydrogen in a liquid state. The combined electrical power and hydrogen energy infrastructure also includes a supply apparatus to pump hydrogen into the one or more paths and to cool and pressurize the hydrogen to maintain the hydrogen in a liquid state. A distribution apparatus is operatively coupled to the one or more fluid paths at a different location along or at an end of the electrical transmission line to draw off the hydrogen for distribution of the hydrogen for use as a hydrogen fuel. An electrical transmission line and a method for supplying a fluid via an electrical transmission line are also described.

High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an nm array of cable subassemblies. Within a cable assembly, a first cable subassembly of the array of subassemblies is oriented substantially perpendicular to a second cable subassembly with regard to the plurality of tapes. A compound-cable assembly is formed by joining two or more cable assemblies. A high-temperature superconducting magnet is formed of a solenoidal magnet as well as dipole and quadrupole magnets wound of a cable subassembly, a cable assembly, and/or a compound cable assembly.

High-temperature superconducting (HTS) devices and methods are disclosed. An HTS cable subassembly has a rectangular shaped cross section. The subassembly includes a stack of tapes formed of a superconducting material, and a cable subassembly wrapper wrapped around the stack of tapes. The tapes in the stack are slidably arranged in a parallel fashion. A cable assembly is formed of a cable assembly wrapper formed of a second non-superconducting material disposed around an nm array of cable subassemblies. Within a cable assembly, a first cable subassembly of the array of subassemblies is oriented substantially perpendicular to a second cable subassembly with regard to the plurality of tapes. A compound-cable assembly is formed by joining two or more cable assemblies. A high-temperature superconducting magnet is formed of a solenoidal magnet as well as dipole and quadrupole magnets wound of a cable subassembly, a cable assembly, and/or a compound cable assembly.

A method for constructing a superconductive cable system is proposed. Using this method, at least one superconductive cable (2) is mounted in a tubular cryostat (3) serving for guiding a cooling agent by means of which the cryostat (3) equipped with the cable (2) and wherein the cable (2) and the cryostat (3) are transported to the placement location and both ends are connected to units. The cable (2) is mounted in a cryostat (3) which at both axial ends (3b, 3c) protrudes beyond the cable (2). The unit of cable (2) and cryostat (3) is transported to the placement location. The ends (3b, 3c) protruding beyond the cable (2) are cut to a predetermined length. The superconductive cable (2) and the cryostat (3) are subsequently connected to the units.

A method for constructing a superconductive cable system is proposed. Using this method, at least one superconductive cable (2) is mounted in a tubular cryostat (3) serving for guiding a cooling agent by means of which the cryostat (3) equipped with the cable (2) and wherein the cable (2) and the cryostat (3) are transported to the placement location and both ends are connected to units. The cable (2) is mounted in a cryostat (3) which at both axial ends (3b, 3c) protrudes beyond the cable (2). The unit of cable (2) and cryostat (3) is transported to the placement location. The ends (3b, 3c) protruding beyond the cable (2) are cut to a predetermined length. The superconductive cable (2) and the cryostat (3) are subsequently connected to the units.