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

Current-carrying limiting value estimation method of overhead transmission line

A technology for overhead transmission lines and overhead conductors, which is applied in the field of real-time maximum ampacity assessment of overhead transmission lines, can solve problems such as large changes in conductor temperature along the line, steel core temperature errors, etc., and achieve the effect of safe and efficient power market transactions

Inactive Publication Date: 2014-09-24
GRID POWER PLANNING & RES CENT OF GUANGDONG GRID POWER CO LTD
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the wind speed changes greatly along the wire, the temperature of the wire varies greatly along the wire, and the measured temperature at a certain point of the wire cannot represent the average temperature of the wire; in addition, the temperature measured by the temperature sensor is the surface temperature of the wire, which is different from that of the wire The temperature of the internal steel core will also have a certain error

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
  • Current-carrying limiting value estimation method of overhead transmission line
  • Current-carrying limiting value estimation method of overhead transmission line
  • Current-carrying limiting value estimation method of overhead transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The method for evaluating the current-carrying limit of an overhead transmission line according to the present invention will be further described below based on specific embodiments and accompanying drawings, but this description does not constitute an improper limitation of the present invention.

[0059] figure 1 It shows the positional relationship between the camera and the overhead transmission line in one embodiment of the method for evaluating the current carrying limit of the overhead transmission line according to the present invention; figure 2 The images obtained by the camera of this embodiment at two different positions are shown; image 3 The ranging principle of this embodiment is illustrated.

[0060] like figure 1 As shown, the method of the present embodiment selects a section of conductor 2 in a certain 110kV line as the evaluation object. The height of the two towers 1 at both ends of the conductor 2 is 15m, and the span 1 is 150m. The model of 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 current-carrying limiting value estimation method of an overhead transmission line. The current-carrying limiting value estimation method of the overhead transmission line comprises the steps that (1) a movable camera arranged on the lowest point of an overhead conductor between two towers is used for obtaining the conductor sag; (2) the tensioning force of the conductor is calculated according to the obtained conductor sag; (3) the actual temperature of the conductor is obtained according to the tensioning force of the conductor, the real-time current-carrying amount of the conductor and the environment wind speed; (4) the real-time maximum current-carrying amount of the conductor is estimated according to the actual temperature of the conductor and the obtained environment parameters. According to the current-carrying limiting value estimation method of the overhead transmission line, the actual temperature of the conductor is indirectly obtained by obtaining the conductor sag, the temperature accuracy is far higher than that of a current method that the temperature is directly read by a temperature sensor, and therefore the real-time maximum current-carrying amount of the overhead transmission line can be accurately estimated. The quite important data accuracy of a transmission line dynamic capacity-increasing system serving as an important part of a supporting system of the intelligent transmission line technology in an intelligent power grid is achieved and is greatly significant for safety and efficiency of power transmission and electricity market transactions.

Description

technical field [0001] The invention relates to a method for evaluating the real-time maximum carrying capacity of a transmission line, in particular to a method for evaluating the real-time maximum carrying capacity of an overhead transmission line. Background technique [0002] my country is currently in a period of rapid development of the power system. On the one hand, due to the constraints of capital, land, environmental protection and many other conditions, it is more difficult to acquire land for transmission corridors. Line corridors are increasingly becoming scarce resources, and it is becoming more and more difficult to build new lines. In-depth research is urgently needed to fully utilize the transmission capacity of the power grid; on the other hand, after the emergence of the power market and transshipment, power transmission capacity is not only a technical indicator of the power grid, but also a market signal reflecting the power transmission capacity of the po...

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
IPC IPC(8): G06Q50/06
Inventor 蔡广林林勇郑秀波郇嘉嘉
Owner GRID POWER PLANNING & RES CENT OF GUANGDONG GRID POWER 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