Cascading failure search comprehensive assessment method based on probability index and severity index

A technology of cascading failures and comprehensive evaluation, applied in the direction of instruments, data processing applications, calculations, etc., can solve problems such as power system cascading failures, system crashes, and failure to comprehensively consider the severity of subsequent developments

Active Publication Date: 2014-10-22
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that after the initial disturbance of the power system, due to factors such as power flow changes, equipment overload, and relay protection actions, cascading failures are caused, resulting in system collapse.
Because there are many possibilities of branches and bifurcations in the development sequence of cascading faults, the existing search algorithms can only obtain individual possible cascading fault chains according to the principle of high probability, and cannot be considered comprehensively in the search process Influence of Probability of Occurrence and Severity of Subsequent Development

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
  • Cascading failure search comprehensive assessment method based on probability index and severity index
  • Cascading failure search comprehensive assessment method based on probability index and severity index
  • Cascading failure search comprehensive assessment method based on probability index and severity index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] The present invention provides a cascading fault search comprehensive evaluation method based on probability index and severity index. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] See figure 1 , figure 1 It is a flow chart of a preferred embodiment of the cascading fault search comprehensive evaluation method based on the probability index and the severity index of the present invention. Such as figure 1 As shown, the comprehensive evaluation method for cascading fault search based on probability index and severity index includes:

[0056] S100. Obtain the failure possibility index of the alternative equipment in each cascading ...

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 cascading failure search comprehensive assessment method based on a probability index and a severity index, by analysis of an operating state of a power grid after each class of failure, a probability index and a severity index of a failure occurring in a next-class alternative line are obtained, and a cascading failure comprehensive risk index of the alternative line is obtained through classified integration. The method is convenient, simple and efficient, and can provide a basis for judging weak links of a system, and making a prevention and control strategy for lowering cascading failure risks.

Description

technical field [0001] The invention relates to the technical field of power system safety protection, in particular to a method for searching and comprehensively evaluating cascading faults based on probability indexes and severity indexes. Background technique [0002] With the continuous expansion of the power system scale, there have been many blackouts in domestic and foreign power systems in recent years, such as the "8.10" blackout in the western United States, the "8.14" blackout in the United States and Canada, the "9.28" blackout in Italy, and the "11.4" blackout in Europe. Blackout etc. The reason is that after the initial disturbance of the power system, due to factors such as power flow changes, equipment overload and relay protection actions, cascading failures are caused, resulting in system collapse. Because there are many possibilities of branches and bifurcations in the development sequence of cascading faults, the existing search algorithms generally can ...

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): G06Q50/06
Inventor 李蓉蓉邸鹏宇周保荣管霖王素云马义松金小明
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