Radial direct-current power grid stability judgment method and system

A DC power grid and stability technology, applied in the field of radial DC grid stability judgment, can solve problems such as massive modeling and calculation of DC power grids, heavy power grid modeling workload, and complex systems

Active Publication Date: 2015-12-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous access of DC power sources and loads, the system will become more and more complex, and the workload of modeling the entire power grid will increase. The analysis of the stability of the DC power grid requires a large number of modeling calculations

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
  • Radial direct-current power grid stability judgment method and system
  • Radial direct-current power grid stability judgment method and system
  • Radial direct-current power grid stability judgment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more re...

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 relates to a radial direct-current power grid stability judgment method and system. The method includes the following steps of: obtaining the type of an AC/AC converter; modeling the AC/AC converter according to the type of the AC/AC converter so as to obtain the output voltage of the AC/AC converter; judging the stability of the output voltage according to Nyquist stability criterion; and judging the stability of a radial direct-current power grid according to the judgment result of the stability of the output voltage. According to the radial direct-current power grid stability judgment method and system of the invention, the AC/AC converter is modeled, so that the output voltage of the AC/AC converter can be obtained; the stability of the output voltage is judged according to Nyquist stability criterion; and the stability of the radial direct-current power grid can be judged according to the judgment result of the stability of the output voltage. Modeling for the whole power grid is not required, and therefore, the judgment method of the stability of the radial direct-current power grid can be effectively simplified.

Description

Technical field [0001] The invention relates to the field of power system stability analysis, in particular to a method and system for judging the stability of a radial DC power grid. Background technique [0002] With the rapid development of distributed renewable energy such as photovoltaics and wind power and the large number of DC loads such as electric vehicles and LEDs, in order to improve transmission, distribution, power efficiency, power supply reliability and power quality, and alleviate the shortage of power transmission and distribution corridors, etc. The problem is that the demand for using flexible DC technology to build a power grid is becoming increasingly urgent. However, due to the widespread use of power electronic converters in the DC grid, there are interactions between different converters, which may even cause the DC grid to fail to operate stably in severe cases. [0003] figure 1 It is a schematic diagram of a DC grid with a radial structure. The radial ...

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): H02J1/10
Inventor 李巍巍黎小林许树楷
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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