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

Method for making interconnected network transient stability emergency control strategies based on inter-region tie line measurement

A technology for interconnected power grids and emergency control, applied to AC network circuits, AC network flicker reduction, electrical components, etc., can solve problems such as poor adaptability, achieve less measurement, less calculation, and improve reliability.

Inactive Publication Date: 2015-03-25
CHINA SOUTHERN POWER GRID COMPANY
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of conventional offline simulation-based transient stability control methods based on event identification and poor adaptability

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 for making interconnected network transient stability emergency control strategies based on inter-region tie line measurement
  • Method for making interconnected network transient stability emergency control strategies based on inter-region tie line measurement
  • Method for making interconnected network transient stability emergency control strategies based on inter-region tie line measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] The disturbance of a multi-machine system usually presents a two-machine instability mode, ignoring the Brownian motion within the cluster that has little effect on the system out-of-step, and can be simplified to a two-machine equivalent model, as shown in figure 2 As shown, the equivalent potentials of the two machines are respectively and C is the system oscillation center. according to image 3The derivation of the variable relationship shows that in the non-fault state of the system, the relative power angle of the two groups C (t) has the following functional relationship:

[0043] U C ( t ) E N cos δ ( 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 provides a method for making interconnected network transient stability emergency control strategies based on inter-region tie line measurement. The method comprises the following steps that 1, an off-line control strategy is made, tie lines among important regions are recorded, and the emergency control strategies for all regions of an interconnected network are made by means of fault setting; 2, relative power angles among the regions are calculated, in the actual operation process of the interconnected network, a PMU is used for collecting real-time voltage values of the tie lines of all the regions, and the relative power angle between every two regions is calculated; 3, the region where a unit disturbed most severely is located is judged, and according to real-time information of the relative power angles among the regions, contrastive analysis is carried out to determine the position where the unit disturbed most severely in the interconnected network is located; 4, emergency generator tripping control is implemented, and according to the area where the unit disturbed most severely is located, the specific off-line generator tripping control strategy is executed to prevent transient state stability loss of the system. The method has the advantages that the needed measurement amount is small, the calculation amount is small, and the method is suitable for the large region interconnected network and high in pertinence.

Description

technical field [0001] The invention relates to the technical field of power system stability control, in particular to a method for formulating an emergency control strategy for temporary stability of an interconnected power grid based on interval tie line measurement, which is applicable to power grids with wide area measurement systems (WAMS). Background technique [0002] With the wide application of Wide Area Measurement System (WAMS) in power system, it is possible to realize the transient stability control of power system based on actual measurement. [0003] Document 1 "Power System Safety and Stability Control" (China Electric Power Press, 2000, p. 8) shows that: traditional emergency control of transient stability is mostly based on offline simulation, and realizes online fast matching through established control strategies. The method relies heavily on the accuracy of offline simulations. In order to achieve better control purposes, Document 2 "Online Generation ...

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): H02J3/00
CPCH02J3/00H02J3/001H02J3/002Y02E60/00
Inventor 徐光虎张勇邓晖赵晋权白杨梅勇刘春晓张建新任祖怡
Owner CHINA SOUTHERN POWER GRID COMPANY
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