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

Converter transient stability determination method and device based on critical index

A technology of transient stability and judgment method, which is applied in the direction of measuring devices, instruments, and measurement of electrical variables, etc., can solve the problems that no method for judging the transient stability of converters has been proposed, and achieve the reduction of time cost and algorithm difficulty and scope of application Wide and versatile effect

Active Publication Date: 2021-10-26
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, no better transient stability determination method for virtual synchronous control converters has been proposed so far.

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
  • Converter transient stability determination method and device based on critical index
  • Converter transient stability determination method and device based on critical index
  • Converter transient stability determination method and device based on critical index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0056] like figure 1 Shown is a flow chart of a method for judging transient stability of a converter based on a critical index in an embodiment of the present invention.

[0057] Please refer to figure 1 , the converter transient stability determination method in this embodiment includes the following steps:

[0058] S11: select an index related to the transient stability of the converter, and the index is a function of one or more variables related to the converter;

[0059] S12: Substituting one or more variables in S11 into the function to obtain the current value of the indicator;

[0060] S13: Comparing t...

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 converter transient stability determination method and device based on a critical index, and the method comprises the steps: selecting an index related to the transient stability of a converter, wherein the index is a function of one or more variables related to the converter; substituting one or more variables into the function to obtain a current value of the index; comparing the current value of the index with the critical value of the index; and judging the transient stability of the converter according to a comparison result. The device comprises an index establishment unit, an index current value calculation unit, a comparison unit and a result judgment unit, and is used for realizing the method. The converter transient stability judgment method and device based on the critical index have the advantages of being simple in criterion, high in accuracy, high in universality to different fault types and high in applicability to different converter control modes.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a method and device for judging the transient stability of a converter based on a critical index. Background technique [0002] The proportion of new energy power generation represented by wind and solar power in the power system is increasing year by year, and the three-phase voltage source converter is the interface between these asynchronous machine power sources and the AC grid; on the other hand, with DC transmission and microgrid With the rapid development of this kind of converter, it plays an increasingly important role in the power system. This requires the converter to provide support to the grid as much as possible and reduce the power shortage after the transient state of the grid occurs, instead of going off-grid and blocking as before. [0003] During the transient state, the converter will face two problems, namely, fault ride-through and transient stabi...

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): G01R31/00G01R31/42G01R19/00G01R19/04
CPCG01R31/00G01R31/42G01R19/0053G01R19/04Y02E60/60
Inventor 邱伟蔡旭张宇李岩吕敬赵晓斌
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID 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