A superconducting current-limiting transformer cooled by liquid nitrogen and fluorocarbon mixed liquid insulating medium

A liquid-insulated, superconducting current-limiting technology, applied in the direction of transformers, fixed transformers or mutual inductance, variable inductance/transformers, etc., can solve the problems that the safety of current-limiting transformers is difficult to guarantee, and achieve improved current-carrying and insulation performance, Strong current-carrying capacity and improved safety

Active Publication Date: 2022-03-08
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +2
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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing current-limiting transformers that use saturated liquid nitrogen or supercooled liquid nitrogen to directly cool the transformer windings, and the sudden increase in the pressure of the low-temperature container during current limiting, which makes it difficult to guarantee the safety of the current-limiting transformer. Superconducting current-limiting transformer cooled with fluorocarbon mixed liquid insulating medium

Method used

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  • A superconducting current-limiting transformer cooled by liquid nitrogen and fluorocarbon mixed liquid insulating medium
  • A superconducting current-limiting transformer cooled by liquid nitrogen and fluorocarbon mixed liquid insulating medium
  • A superconducting current-limiting transformer cooled by liquid nitrogen and fluorocarbon mixed liquid insulating medium

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] figure 1 Shown is the structure of a single-phase three-column superconducting current-limiting transformer directly cooled by a refrigerator in Embodiment 1 of the present invention. The superconducting current-limiting transformer consists of an iron core 1, a high-voltage superconducting winding 2, a low-voltage superconducting winding 3, a glass fiber reinforced plastic Dewar 4 with a vacuum interlayer, a liquid nitrogen and fluorocarbon mixed liquid insulating medium 5, a high-voltage outlet terminal 6, a low-voltage The outlet terminal 7 and the refrigerator 8 constitute. The high-voltage superconducting winding 2 and the low-voltage superconducting winding 3 are located inside the FRP Dewar 4 with vacuum interlayer; the FRP Dewar 4 is filled with liquid nitrogen and fluorocarbon mixed liquid insulating medium 5; the high-voltage ...

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Abstract

A superconducting current-limiting transformer cooled by a mixed medium of liquid nitrogen and fluorocarbon, consisting of an iron core (1), a high-voltage superconducting winding (2), a low-voltage superconducting winding (3), and a fiberglass Dewar with a vacuum interlayer (4) , liquid nitrogen and fluorocarbon mixed liquid insulating medium (5), high-voltage outlet terminal (6), low-voltage outlet terminal (7), refrigerator (8) and cryopump (9); high-voltage superconducting winding (2), low-voltage The superconducting winding (3) is located in the FRP Dewar (4) with vacuum interlayer, and the FRP Dewar (4) is filled with liquid nitrogen and fluorocarbon mixed liquid insulating medium (5); the high-voltage superconducting winding (2) and The low-voltage superconducting winding (3) is cooled and insulated by a liquid insulating medium (5) mixed with liquid nitrogen and fluorocarbon. The liquid insulating medium (5) mixed with liquid nitrogen and fluorocarbon is directly cooled by the refrigerator (8) or the refrigerator (8) plus the cryopump (9) is forced to circulate and cool.

Description

technical field [0001] The invention relates to a superconducting current-limiting transformer. Background technique [0002] The superconducting current-limiting transformer combines the functions and technical advantages of superconducting transformers and superconducting current limiters. The ability can also help to improve the stability of the power grid, and can play a unique role in the fields of large-capacity power transmission, smart urban power grids, and flexible AC transmission systems. The superconducting current-limiting transformer realizes the composite function of superconducting power equipment, and has become one of the hot spots in the research and development of superconducting technology in the world. [0003] Countries such as Germany, Japan, the United States and Russia have successively carried out relevant research on superconducting current-limiting transformers, and developed test prototypes. In China, the Institute of Electrical Engineering of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F36/00H01F6/04H01F6/06H02H9/02
CPCH01F36/00H01F6/04H01F6/06H02H9/023Y02E40/60
Inventor 邱清泉罗朝志李振明张宏杰韦德福郭铁王冠宇周志浩
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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