Cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and detecting method thereof

A detection circuit and high-temperature superconducting technology, applied in the field of power system, can solve the problems of damage, endanger the safety of power system, stable operation, high transmission power of superconducting cable lines, etc. Effect

Inactive Publication Date: 2013-09-25
STATE GRID CORP OF CHINA +2
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the zero-resistance characteristic of high-temperature superconducting cables can only be obtained under the premise that the cables are operating in a superconducting state. The conductive stri

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
  • Cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and detecting method thereof
  • Cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and detecting method thereof
  • Cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and detecting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] Cold-insulated high-temperature superconducting cables have complex multi-layer structures, such as the attached figure 1 shown. From the inside to the outside, there are copper core coil frame, high-temperature superconducting conductive layer, insulating medium layer, high-temperature superconducting shielding layer, copper stabilization layer, liquid nitrogen, inner low-temperature bisque, heat insulation layer, outer low-temperature wall and cable sheath. During normal operation, the magnitude difference between the current in the shielding layer of the superconducting cable and the current in the conductor layer is very small, and the ratio between the two is usually greater than or equal to 95%. And when a quench fault occurs, the shielding layer of the cable is quenched, and its resistance increases substa...

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 belongs to the technical field of electrical power systems, and discloses a cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit and a detecting method of the cold-insulating high-temperature superconducting cable superconductivity losing detecting circuit. The superconductivity loosing detecting circuit comprises a first current sensor, a second current sensor, a first optical coupling isolation circuit, a second optical coupling isolation circuit, an analog division circuit and a comparison circuit. The first current sensor and the first optical coupling isolation circuit are connected to form a first collecting and isolating circuit. The second current sensor and the second optical coupling isolation circuit are connected to form a second collecting and isolating circuit. The first collecting and isolating circuit and the second collecting and isolating circuit are connected with the analog division circuit and the comparison circuit respectively in sequence. Through the detecting circuit and the detecting method, the superconductivity losing failure of a superconducting cable can be fast detected, and detecting accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a quench detection circuit and a detection method of a cold-insulated high-temperature superconducting cable. Background technique [0002] In 1911, the Dutch scientist H. Kamerlingh Onnes first discovered superconductivity in mercury at 4.2K. Since then, using the zero-resistance characteristic of superconductors to reduce losses has become the dream of electric workers. But until recent years, with the increasing maturity of superconducting application research, high-temperature superconducting cable transmission technology has gradually entered the stage of engineering application. Superconducting cable transmission technology has significant advantages such as large transmission capacity, low loss, small footprint, energy saving and environmental protection, and has gradually become one of the important development directions of current power transmission te...

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
IPC IPC(8): G01R31/00
Inventor 侯经洲魏斌赵勇青丘明
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap