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

High-voltage transmission line protection starting element based on transition resistance and change rate thereof

A technology of high-voltage transmission lines and transition resistance, applied in the direction of electrical components, emergency protection circuit devices, etc., can solve problems such as failure to start, and achieve the effects of avoiding refusal, improving reliability, and improving sensitivity

Pending Publication Date: 2022-05-13
XIAN UNIV OF TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-voltage transmission line protection starting element based on transition resistance and its rate of change, so as to solve the problem in the prior art that the sudden change starting element and the zero-sequence current starting element cannot start when facing a high-resistance grounding fault of a high-voltage transmission line problems, so that the protection can quickly start and enter the fault handling procedure, thereby improving the sensitivity and reliability of high-voltage transmission line protection

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
  • High-voltage transmission line protection starting element based on transition resistance and change rate thereof
  • High-voltage transmission line protection starting element based on transition resistance and change rate thereof
  • High-voltage transmission line protection starting element based on transition resistance and change rate thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] The schematic diagram of the single-phase high-resistance ground fault line of the applicable high-voltage transmission line is as follows: Figure 5 As shown, when the high-voltage transmission line protection starting element based on the transition resistance and its rate of change of the present invention is used for protection, the time for identifying the transition resistance is determined according to local conditions. When the high-voltage transmission line passes through the plain area, it is set to every T 1 Identify primary transition resistance. When high-voltage transmission lines pass through forested areas or mountainous areas, single-phase high-resistance grounding faults caused by high-voltage transmission lines touching trees and wildfires are prone to occur. Therefore, it is set to identify transition resistance every T. where T 1 >T 2 , in this example T 1 = 100ms, T = 20ms.

[0082] Let the corresponding minimum change rate of transition resista...

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 high-voltage transmission line protection starting element based on a transition resistor and a change rate of the transition resistor. When a high-voltage transmission line discharges to surrounding branches and moso bamboos due to factors such as insulator flashover, lightning stroke and mountain fire or discharges through mountain flame, a single-phase high-resistance grounding fault is caused. By calculating the transition resistance and utilizing the transition resistance to start the protection of the high-voltage transmission line, the defects of the existing starting element are overcome, the sensitivity of the protection starting element is effectively improved, the operation refusal of the protection is avoided, and the reliability of the whole group of protection is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a high-voltage transmission line protection starting element based on transition resistance and its change rate. Background technique [0002] The transmission line is an integral part of the power system. It is responsible for the task of transmitting and distributing electric energy. The main task of the starting element is to activate the protection device or enter the fault calculation program when a short-circuit fault occurs on the transmission line. [0003] Due to the reverse distribution of power supply and load in China, it is necessary to use long-distance transmission lines. Multiple transmission lines need to pass through densely vegetated forest areas and mountainous areas. High-resistance single-phase grounding has been caused many times due to flame grounding, moso bamboo grounding, or treetop grounding. Fault. This kind...

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): H02H7/26
CPCH02H7/26H02H7/263
Inventor 梁振锋孙思洁王晓卫张惠智潘忠美
Owner XIAN UNIV OF TECH
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