Main insulation structural device and method of vertical high-temperature superconducting resistance type current limiter

Abstract

The embodiment of the invention provides a main insulation structural device and method of a vertical high-temperature superconducting resistance type current limiter. The device comprises wire-outletunits, a superconducting resistance current-limiting unit, a low-temperature container, a paper insulation and liquid nitrogen, the superconducting resistance current-limiting unit is arranged at thecentral position in the device and connected with the two wire-outlet units to be led out to the outside of the device, the low-temperature container is a cylinder structure, the paper insulation isa cylindrical structure, the external diameter of the paper insulation is the same as the internal diameter of the low-temperature container, the paper insulation is arranged at the inner side of thelow-temperature container, the liquid nitrogen is arranged between the paper insulation and the superconducting resistance current-limiting unit, and a composite insulation structure formed by the liquid nitrogen and the paper insulation bears an operating voltage and an impulse voltage of the high-temperature superconducting resistance type current limiter together. According to the device and method, the withstand voltage requirement of main insulation can be satisfied, the overall appearance and size of the main insulation structural device can be reduced, the requirement of equipment occupation of the superconducting current limiter is reduced, and the effective utilization rate of the liquid nitrogen is increased.

Description

Technical field [0001] The invention relates to the technical field of fault current limiters, in particular to a main insulation structure device and method of a vertical high-temperature superconducting resistance current limiter. Background technique [0002] The resistance type high temperature superconducting current limiter is a new type of fault current limiting equipment that uses the superconducting state of the high temperature superconductor to work quickly. It has fast response speed, low normal operation loss, and integrates detection, triggering, current limiting and The automatic recovery function is integrated, and it is an ideal current-limiting technology and device development plan for the power system. It has broad prospects and huge market demand potential. [0003] The resistive superconducting current limiter uses the second-generation high-temperature superconducting tape wound superconducting resistance current limiter unit that has been commercially produc...

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Problems solved by technology

[0006] The disadvantage of using liquid nitrogen in the above-mentioned prior art for main insulation design is that although this design based on the worst case can meet the insulation requirements, due to the large margin, the resistance of the resistive superconducting current limiter The size of the Dewar is large, and the utilization rate of liquid nitrogen is low

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