Power grid emergency control method and device for dealing with impact of DC faults on weak AC channels

A DC fault and emergency control technology, applied in the direction of power transmission AC network, etc., can solve the problems of insufficient safety control and cutting machine capacity, and disconnection of surplus power lines, etc., to achieve strong operability and practicability, high practical value, good adaptive effect

Pending Publication Date: 2019-05-24
CHINA ELECTRIC POWER RES INST +2
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, only a single DC blocking fault scenario was considered in the design of the DC safety control system. When multiple DC blocking faults occur at the same tim

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
  • Power grid emergency control method and device for dealing with impact of DC faults on weak AC channels
  • Power grid emergency control method and device for dealing with impact of DC faults on weak AC channels
  • Power grid emergency control method and device for dealing with impact of DC faults on weak AC channels

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0058] The present invention will be further described in detail below in conjunction with the drawings. In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0059] figure 1 This is a flow chart of the present invention, a grid emergency control method for dealing with weak AC channels impacted by DC faults, including:

[0060] Determine the total cut-off limit based on the total power loss of...

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 provides a power grid emergency control method and device for dealing with the impact of DC faults on weak AC channels. The method includes the following steps: determining the total cut-off limit according to the total power loss of multiple DC lines after simultaneous locking faults and the total surplus power of weak AC channels; determining the additional cut-off quantity allocation coefficient of each DC line according to the minimum cut-off demand of the DC lines with simultaneous blocking faults; and determining the additional cut-off quantity of each DC line according tothe total cut-off limit and the additional cut-off quantity allocation coefficient of each DC line, and performing cut-off control. The technical scheme provided by the invention can take into accountboth the cut-off demand in case of a blocking fault of a single DC line and the cut-off demand in case of simultaneous blocking faults of multiple DC lines, and has good adaptability to multi-fault scenarios. The technical scheme has the advantages of being simple in principle, stable and reliable, and highly operable and practical, and has high practical value and good market prospects.

Description

technical field [0001] The invention relates to a method in the technical field of electric power system stability control, in particular to a power grid emergency control method and device for dealing with a DC fault impacting a weak AC channel. Background technique [0002] At present, energy resources and load centers present the characteristics of reverse distribution, which objectively determines that the current power grid structure has the characteristics of large power supply, large power grid, large capacity, and long-distance power transmission. Long-distance cross-regional DC transmission technology has the characteristics of large transmission capacity, fast controllability, and effective limitation of short-circuit current, which makes up for the shortcomings of traditional AC transmission and has been widely developed. [0003] With the intensive commissioning of UHVDC power transmission projects, there are the following typical AC-DC power transmission scenari...

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): H02J3/36
CPCY02E60/60
Inventor 王青郝梦竹李轶群江长明宋云亭陈得治罗亚洲马世英高洵贾琳訾鹏谭贝斯赵伟吴丽华
Owner CHINA ELECTRIC POWER RES INST
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