Superconductive current limiter with composite insulation structure

A technology of superconducting current limiter and composite insulation, applied in the field of superconducting, can solve problems such as liquid nitrogen vaporization, achieve the effect of preventing bubbles, ensuring insulation effect, and reducing impact

Pending Publication Date: 2019-05-28
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest problem with liquid nitrogen as an insulating medium is that liquid nitrogen at 77K is always in a boiling state, and even if it cools do

Method used

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  • Superconductive current limiter with composite insulation structure

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Embodiment Construction

[0035] The embodiment of the present invention provides a superconducting current limiter with a composite insulating structure, which prevents the generation of air bubbles between electrodes and ensures the insulation effect of the resistive superconducting current limiter.

[0036] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] see figure 1 , the present invention provides an embo...

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Abstract

The invention discloses a superconductive current limiter with a composite insulation structure. The superconductive current limiter comprises a superconductive current limiting unit, an inner composite insulating cylinder, an outer composite insulating cylinder and a low-temperature container, wherein the inner composite insulating cylinder coaxially sleeves the superconductive current limiting unit along the axial direction; the low-temperature container coaxially sleeves the external composite insulating cylinder along the axial direction; the superconductive current limiting unit is fixedly connected with the inner composite insulating cylinder through inner insulating supporting pieces, and the low-temperature container is fixedly connected with the outer composite insulating cylinderthrough outer insulating supporting pieces. Through the outer composite insulating cylinder connected with the low-temperature container, and the inner composite insulating cylinder connected with the superconductive current limiting unit, air bubbles generated by the low-temperature container are blocked between the low-temperature container and the outer composite insulating cylinder; bubbles generated by the superconductive current limiting unit are blocked between the superconductive current limiting unit and the inner composite insulating cylinder, so that a radial diffusion path of thebubbles in a liquid nitrogen space is blocked, generation of the bubbles between electrodes is prevented, and the insulating effect of the resistive superconductive current limiter is ensured.

Description

technical field [0001] The invention relates to the field of superconducting technology, in particular to a superconducting current limiter with a composite insulating structure. Background technique [0002] The resistive superconducting current limiter is a power device used to suppress the magnitude of short-circuit fault current in the power grid, and insulation is the first problem that all high-voltage power devices need to solve. The resistive superconducting current limiter is mainly developed based on the superconducting state-normal state transition characteristics of the superconducting strip. When the steady-state operating current is normally transmitted, it is in a superconducting state, and the resistance is close to "zero"; when a short-circuit fault occurs in the power grid When , the superconducting strip automatically turns into a normal state under the action of current, and the resistance quickly becomes the resistance value of a conventional conductor, ...

Claims

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Application Information

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IPC IPC(8): H02H9/02H01B17/60H01B17/58
CPCH01B17/60H01C1/028H01C7/13H01B17/58
Inventor 宋萌钟连宏赵兵李力罗运松夏亚君程文锋史正军戴少涛王邦柱胡磊马韬张腾
Owner GUANGDONG POWER GRID CO LTD
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