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

Method and device of pilot protection incomplete phase fault opening of double circuits on same tower

A double-circuit line and longitudinal protection technology, which is applied to emergency protection circuit devices, electrical components, etc., can solve the problem that the directional components cannot be opened, etc.

Active Publication Date: 2016-12-21
XUJI GRP +4
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for non-full-phase grounding fault opening for longitudinal protection of double-circuit lines on the same pole, that is, a method for comparing voltage amplitudes to solve the problem that the directional element cannot be opened due to the problem of voltage sensitivity problems, to ensure the correctness of the non-full-phase longitudinal protection action

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 and device of pilot protection incomplete phase fault opening of double circuits on same tower
  • Method and device of pilot protection incomplete phase fault opening of double circuits on same tower
  • Method and device of pilot protection incomplete phase fault opening of double circuits on same tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Embodiment of non-full-phase grounding fault opening method for longitudinal protection of double-circuit lines on the same pole

[0026] A non-full-phase fault opening method for longitudinal protection of double-circuit lines on the same pole according to the present invention mainly adopts the method of voltage amplitude comparison, and combines the judging conditions of whether the phase selection partition of the current side or the opposite side is the current phase, and When the impedance quadrilateral of the corresponding phase operates, the correct action of the non-full phase distance of the longitudinal protection is realized.

[0027] The following is an example of non-full-phase opening of phase A, such as figure 1 and 2 shown. Among them, the non-full-phase opening logic of B and C phases is the same as that of A phase. Its opening pr...

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 relates to a method and device of the pilot protection incomplete phase fault opening of double circuits on a same tower. For an incomplete phase ground phase, an existing direction component can not act when the voltage is too low to cause a protection misoperation. The invention provides a voltage equation criterion to substitute a present direction component, according to the criterion, positive and negative direction fault protection measurement current and impedance product voltage amplitude characteristic differences are mainly used to propose a criterion |Theta*Zl|>k*Un, and after using a voltage equation criterion, the correctness of incomplete phase fault pilot protection action can be ensured. The technical scheme of the invention has the advantages of clear directivity, no influence by measurement voltage amplitude, and higher sensitivity compared with a traditional direction element.

Description

technical field [0001] The invention relates to a method and device for non-full-phase ground fault opening for longitudinal protection of double-circuit lines on the same pole, and belongs to the technical field of relay protection of electric power systems. Background technique [0002] The double-circuit line on the same pole refers to two lines that run in parallel at a relatively short distance in part or in the whole process. The outgoing line corridor is narrow, the transmission capacity is large, the investment is small, the effect is quick, and the operation and maintenance are simple. [0003] There are many types of cross-line faults on double-circuit lines on the same pole. After a multi-phase cross-line fault occurs, the line jumps one phase and enters a non-full phase. If the fault still exists, the longitudinal protection is required to quickly remove the fault. When the longitudinal protection is not full-phase, the action logic is generally that the distance...

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): H02H7/26
CPCH02H7/267
Inventor 李旭倪传坤樊占峰李宝伟唐艳梅李文正邓茂军陈继瑞郝慧贞孟利平汪花永颜志刚石光韩伟马卫东
Owner XUJI GRP
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