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

A technology of high-temperature superconductivity and superconducting resistance, which is applied in the usage of superconductor elements, emergency protection circuit devices and circuit devices for limiting overcurrent/overvoltage, and can solve the problem of low utilization rate of liquid nitrogen and remaining surplus Problems such as large size and large size of resistive superconducting current limiter Dewar achieve the effect of reducing equipment floor space requirements, reducing external dimensions, and improving effective utilization

Active Publication Date: 2018-03-13
BEIJING JIAOTONG UNIV
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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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  • Main insulation structural device and method of vertical high-temperature superconducting resistance type current limiter
  • Main insulation structural device and method of vertical high-temperature superconducting resistance type current limiter
  • Main insulation structural device and method of vertical high-temperature superconducting resistance type current limiter

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Embodiment 1

[0043] In order to reduce the size of the superconducting current limiter under the premise of meeting the requirements of the main insulation withstand voltage, and reduce the equipment occupation requirement of the superconducting current limiter, the embodiment of the present invention designs a vertical high temperature superconducting resistor Main insulation structure device and method of type current limiter. The insulating structure device proposed in the embodiment of the present invention is a composite structure. The insulating structure in the device includes liquid nitrogen and paper insulating materials. The paper insulating materials are used to form a multilayer concentric structure combined with liquid nitrogen, which can jointly withstand high temperature superconductivity. The working voltage and impulse voltage of the resistance type current limiter, and by increasing the thickness of the paper insulation to reduce the voltage value that the liquid nitrogen m...

Embodiment 2

[0075] This embodiment provides a main insulation structure device of a vertical high temperature superconducting resistance current limiter.

[0076] figure 1 It is a schematic diagram of a main insulation structure device of a vertical high temperature superconducting resistance current limiter provided by an embodiment of the present invention. The superconducting current limiter system applying the composite main insulation structure of the embodiment of the present invention mainly includes: an outlet unit 1, a superconducting resistance current limiting unit 2, a cryogenic container 3, a paper insulation 4, and liquid nitrogen 5. The paper insulation 4 has a cylindrical structure. The outer diameter of the paper insulation 4 is matched with the inner diameter of the low temperature container 3. After the paper insulation 4 is wound on the outside, it is installed inside the low temperature container 3 and is connected to the cylinder of the low temperature container 3. The...

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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...

Claims

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Application Information

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IPC IPC(8): H02H9/02
CPCH02H9/023Y02E40/60
Inventor 王邦柱戴少涛马韬
Owner BEIJING JIAOTONG UNIV
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