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

Method and device for power supply recovery after flexible direct-current distribution line fault

A flexible DC power distribution and line fault technology, applied in the direction of DC network circuit devices, AC and DC network circuit layout, circuit devices, etc., can solve the problem that the fault recovery scheme of flexible DC transmission lines cannot be directly applied to DC power distribution lines, etc. To achieve the effect of improving the reliability of power supply

Inactive Publication Date: 2020-11-03
JIANGSU ELECTRIC POWER CO +2
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different DC line switching devices lead to different fault isolation and recovery methods. The fault recovery scheme for flexible DC transmission lines cannot be directly applied to DC distribution lines. Further research is still needed on fault recovery for flexible DC distribution lines. method

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
  • Method and device for power supply recovery after flexible direct-current distribution line fault
  • Method and device for power supply recovery after flexible direct-current distribution line fault
  • Method and device for power supply recovery after flexible direct-current distribution line fault

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

[0034] figure 1 A flow chart of a power supply recovery method after a fault of a flexible direct current distribution line according to the present invention is shown.

[0035] Such as figure 1 As shown, ...

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 method and device for power supply recovery after a flexible direct-current distribution line fault, and the method comprises the following steps of using a relay protector to carry out fault detection after the flexible direct-current distribution line fault; after fault detection, carrying out fault positioning; after a measuring point detects a DC line fault, enablingthe relay protector to send a blocking instruction to a converter, and enabling the converter to receive the instruction and block an AC system from feeding a fault current to the fault point; after the fault current is attenuated to be smaller than the direct-current load current, switching off the direct-current load switches at the two sides of the fault section; after the fault is isolated, switching on an interconnection switch, inputting the load after the fault point into a standby power supply, and supplying power via the adjacent converter line; removing faults at fixed points according to fault positioning results; and after the fault is removed, carrying out manual switching operation to return to normal. According to the invention, the problem of power supply recovery after theflexible direct-current distribution line fault can be solved, and the power supply reliability of the direct-current distribution line can be improved.

Description

technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a method and device for restoring power supply after a flexible DC power distribution line fails. Background technique [0002] DC technology has been widely used in power systems due to its advantages of large transmission capacity, low line cost, and no need for synchronous operation. With the continuous operation of DC projects, my country has built the world's largest AC-DC hybrid power grid. The DC distribution network is an important part of the AC-DC hybrid grid, which is of great significance to the consumption of distributed energy and the improvement of power quality, and it is also one of the mainstream forms of future distribution network development. After a short-circuit fault occurs in a DC distribution line, the fault develops very quickly, and the tolerance of power electronic devices is limited. It is necessary to quickly and sele...

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): H02J1/00H02J4/00H02J5/00H02J9/06H02H7/26
CPCH02H7/261H02H7/262H02H7/265H02H7/268H02J1/00H02J4/00H02J5/00H02J9/06
Inventor 詹昕谢晓元薛钟兵刘恒门李培培施慎行刘忠徐伟凡董新洲胡浩宇
Owner JIANGSU ELECTRIC POWER CO
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