Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Differential protection circuit and power supply system

A technology of differential protection and power supply system, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as secondary side parameter mismatch

Inactive Publication Date: 2022-04-26
SGIS SONGSHAN CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a differential protection circuit and a power supply system to solve the problem of mismatching parameters of the secondary side output by different current transformers in the target equipment

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
  • Differential protection circuit and power supply system
  • Differential protection circuit and power supply system
  • Differential protection circuit and power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that the terms "first", "second", and "target" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequentially. It is to be understood that the data so used are interchangeable u...

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 discloses a differential protection circuit and a power supply system. The differential protection circuit is applied to a power supply system. The differential protection circuit comprises two current transformers, the current transformers are arranged between two adjacent target devices, and the parameters of the two current transformers are different; the current converter is connected with the output end of the current transformer, and the current converter is used for converting current signals output by the output end of the current transformer into the same parameters; and the differential protection device is respectively connected with the output end of the current converter and the current transformer, and the differential protection device is used for performing differential protection according to the electric signal output by the output end of the current converter and the electric signal output by the current transformer. According to the technical scheme provided by the embodiment of the invention, the parameters output by the current transformers between the target devices are matched, so that the setting requirement of the differential protection device is met.

Description

technical field [0001] The invention relates to the technical field of power supply and utilization, in particular to a differential protection circuit and a power supply system. Background technique [0002] The existing substation line transformation will have the problem of inconsistency in the parameters of the current transformers between adjacent substations. For example, the predecessor of the 110kV Jiefang A Line was called the 110kV Masteel A Line, the power supply side is the Maba station, the 110kV circuit breaker is an SF6 circuit breaker, and the secondary side of the current transformer is 5A; the load side is the steelmaking station, and the 110kV circuit breaker is GIS equipment circuit breaker, the secondary side of the current transformer is 5A. There is no differential protection for the line, only phase-to-phase distance protection, grounding distance protection, and zero-sequence protection. [0003] Due to the demand for power supply, the power point ...

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): H02H7/26
CPCH02H7/26
Inventor 陶瑞基孟辉王鹏吴慧颖刘钦伟刘贵安孙健钟韶吴东文赵小平谢忠忠
Owner SGIS SONGSHAN CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com