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

Reclosing time on-line capturing method of power transmission line

A transmission line and reclosing technology, which is applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as complex methods, difficult to adapt to large-scale system operation modes and fault modes, and achieve simple calculation and improved transient state. stabilization level effect

Inactive Publication Date: 2012-04-25
NORTHEAST DIANLI UNIVERSITY
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research is still limited to offline tuning analysis, and the method is complicated, and it is difficult to adapt to the changes in the operation mode and failure mode of large-scale systems.

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
  • Reclosing time on-line capturing method of power transmission line
  • Reclosing time on-line capturing method of power transmission line
  • Reclosing time on-line capturing method of power transmission line

Examples

Experimental program
Comparison scheme
Effect test

specific example

[0064] Using the online capture method of reclosing time of transmission lines, the simulation calculation of the optimal reclosing time setting in the case of transient faults in multi-machine power systems is carried out.

[0065] The simulation calculation takes an actual system as an example system, and the local network such as image 3 shown.

[0066] If a three-phase transient fault occurs on line A of the 500kv double-circuit line A and line B between YMC and FTB in the network, the switch action at both ends of line A will remove the fault in 0.1s. The simulation shows that the phase angle difference between the two ends of line B reaches the first time maximum value θ YMC-FTB·max Maxima and minima θ YMC-FTB·min The moments are 0.54s and 1.26s, respectively. If the moment of reclosing t rec When they are set to 0.52s and 1.26s respectively, compare the non-coincidence and t rec At 0.52s and 1.26s respectively, the rocking curve of the generator YMC-HXB and the ch...

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 reclosing time on-line capturing method of a power transmission line. The reclosing time on-line capturing method is characterized by comprising the following steps of: constructing a transient state energy function based on a power system structure keeping model, establishing a branch transient state potential energy function, analyzing transient characteristics of the power transmission line based on branch transient state potential energy, setting reclosing time and the like. According to the reclosing time on-line capturing method of the power transmission line, disclosed by the invention, the optimal reclosing time can be set exactly in real time by fully and effectively utilizing the measured branch information so that the transient state stability of a system is improved; in addition, the invention has the advantages of simple calculation, easiness for implementation, high application value and the like.

Description

technical field [0001] The invention relates to an online capture method for the reclosing time of a power transmission line, which belongs to the technical field of power system stability and control. Background technique [0002] Most of the faults in the power system are transient faults, so the use of automatic reclosing devices in EHV transmission systems is one of the important measures to improve the quality of system transient stability. However, the research on how to optimize the reclosing time based on the minimum intermittent time of the reclosing device to effectively improve the transient stability of the system has always been concerned. The existing research results show that the optimal reclosing time exists, that is, the faster the reclosing, the better it is to suppress the oscillation of the subsequent pendulum of the system after reclosing. Therefore, in recent years, electric power workers have carried out in-depth exploration on how to set the optimal...

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): H02H7/26H02H3/06
Inventor 蔡国伟章昊杨德友
Owner NORTHEAST DIANLI UNIVERSITY
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