Unlock instant, AI-driven research and patent intelligence for your innovation.

Superconducting current limiter

A superconducting current limiter and superconducting technology are applied in the field of superconducting current limiters, which can solve problems such as uneven transmission current, and achieve the effects of ensuring mechanical stability, large transmission current and high electric field strength.

Active Publication Date: 2022-02-08
STATE GRID JIANGSU ECONOMIC RES INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems existing in the prior art, the present invention provides a superconducting current limiter, which is used to replace the smoothing reactor of the conventional flexible DC system, and avoids the problem of uneven transmission current caused by the parallel connection of multiple coils. The technical scheme proposed by the invention is:

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Superconducting current limiter
  • Superconducting current limiter
  • Superconducting current limiter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 , The superconducting current limiter of this embodiment is mainly composed of: a tubular superconducting element 1 , an end conductive element 3 and a shunt solenoid 2 . The tubular superconducting element 1 is mainly composed of: a central cooling tube 11 for transmitting a low-temperature cooling medium, a superconducting cable 12 and an armored tube 13, see figure 2 . The superconducting cables 12 are twisted in parallel on the central cooling pipe 11 and sleeved in the armored pipe 13 . The end of the shunt solenoid 2 is electrically connected to the tubular superconducting element through the end conductive element, and the end conductive element 3 is provided with a cooling medium channel 32 communicating with the central cooling pipe 11 .

[0029] The central cooling pipe 11 of this embodiment adopts a stainless steel metal bellows or a stainless steel metal helical tube. Among them, when the metal bellows structure is used, the cooling medium ...

Embodiment 2

[0035] like image 3 , there are two shunt solenoids in this embodiment (respectively shunt solenoid A 21 and shunt solenoid B22), and the two shunt solenoids are arranged around the tubular superconducting element in different winding directions (different The winding direction can adjust the inductance value), and the two ends of the two shunt solenoids are electrically connected to each other through the end conductive elements. The rest of the technical features of this embodiment are the same as the technical solution of Embodiment 1, and will not be repeated here.

Embodiment 3

[0037] The superconducting current limiter of this embodiment also includes a tubular inductance adjustment unit. The inductance adjustment unit is sleeved on the inner or outer surface of the armored tube 13 of the tubular superconducting element 1, and the inductance adjustment unit is isolated from the end conductive element.

[0038] The inductance adjustment unit in this embodiment is a magnetic ring 4 made of soft magnetic material. The magnetic rings 4 are installed at intervals on the inner or outer surface of the armored tube for adjusting the inductance of the tubular superconducting element 1 . The magnetic field intensity can be locally enhanced by installing magnetic soft material elements on the inner and outer surfaces of the superconducting element. The magnetic ring is installed on the entire length of the tubular superconducting element at certain intervals, which will not reduce the working performance of the current limiter, and does not require special te...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a superconducting current limiter. The superconducting current limiter comprises a tubular superconducting element, an end conductive element and a shunting solenoid; the tubular superconducting element comprises a central cooling pipe used for transmitting a low-temperature cooling medium, superconducting cables and an armored pipe; the superconducting cables are twisted on the central cooling pipe in parallel and sleeved with the armored pipe; and the shunting solenoid is arranged around the periphery of the tubular superconducting element at intervals, the end part of the shunting solenoid ring is electrically connected with the tubular superconducting element through the end conductive element, and the end conductive element is provided with a cooling medium channel communicated with the central cooling pipe. According to the superconducting current limiter, the reliability of the superconducting current limiter is improved, and the size of the current limiter is reduced; and while high electric field intensity is provided, the mechanical stability of the superconducting current limiter under large current impact is ensured.

Description

technical field [0001] The invention belongs to the field of electrical engineering, in particular to a superconducting current limiter. Background technique [0002] When a short circuit occurs in the power transmission system, a large short-circuit current will be generated. If left unchecked, it can be difficult to keep electrical equipment dynamically and thermally stable. In order to meet the requirements of breaking capacity of some circuit breakers, the converter stations of DC transmission are usually equipped with smoothing reactors, which are used to increase the short-circuit impedance, limit the short-circuit current, and prevent the steep wave impact generated by the DC line from entering the valve hall. , so that the converter valve is not damaged by overvoltage. In the flexible DC system, smoothing reactors are connected in series between the DC busbar of the converter station and the DC line, which can suppress the rising rate of the fault current of the DC...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
CPCH02H9/023Y02E40/60
Inventor 何大瑞李妍韩笑王鑫
Owner STATE GRID JIANGSU ECONOMIC RES INST
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement