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

Determination method for high resistance grounding fault of power distribution line

A high-resistance ground fault and judgment method technology, which is applied in the direction of fault location, measurement of electricity, and measurement of electrical variables, can solve difficult problems such as high-resistance ground fault protection, and achieve the effect of high sensitivity and good discrimination ability

Inactive Publication Date: 2018-12-25
GUIZHOU POWER GRID CO LTD
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not propose the distinguishing characteristics of high-resistance ground faults and normal operating conditions in principle, and it is difficult to fundamentally solve the problem of high-resistance ground fault 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
  • Determination method for high resistance grounding fault of power distribution line
  • Determination method for high resistance grounding fault of power distribution line
  • Determination method for high resistance grounding fault of power distribution line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0042] The method for judging high-resistance grounding faults of distribution lines in the present invention includes a fault intermittent detection and judgment process and a fault direction detection and judgment process. The fault direction detection process collects zero-sequence current traveling waves and zero-sequence voltage traveling waves, based on the The direction of the fault is obtained through judgment based on wave information; the fault intermittent detection and judgment process collects zero-sequence current, and judges based on zero-sequence current amplitude change data to obtain specific judgment results.

[0043] Among them, the fault direction ...

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 determination method for a high resistance grounding fault of a power distribution line, comprising a fault intermittent detection and determination process and a fault direction detection and determination process. The fault direction detection process collects a zero-sequence current traveling wave and a zero-sequence voltage traveling wave, and judges based on the traveling wave information to obtain a direction in which the fault occurs. The fault intermittent detection and determination process collects zero-sequence current, and judges based on the zero-sequencecurrent amplitude change data to obtain a specific judgment result. According to the determination method for the high resistance grounding fault of the power distribution line, due to the adoption of directional components, the method is guaranteed to be selective in principle, and on the basis of this, the flexible adjustment of the threshold of intermittent fault characteristic detection makesthe method highly sensitive.

Description

technical field [0001] The invention belongs to the technical field of power system protection and control, in particular relates to distribution line protection and ground fault detection, in particular to a method for judging high-resistance ground faults of power distribution lines. Background technique [0002] A high-resistance ground fault is a harmful contact between a current-carrying conductor and a non-metallic conductive medium in a power system. The electrical properties of non-metallic conductive media limit the fault current. High-resistance ground faults are intermittent and instantaneous, with a short duration. The steady-state characteristics of high-resistance ground faults are not obvious, and traditional distribution line protection devices, such as overcurrent protection, cannot be detected correctly. [0003] The voltage and current changes caused by high-resistance ground faults are very small, similar to load changes, and even lower than the changes...

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): G01R31/08
CPCG01R31/088Y04S10/52
Inventor 何鑫王永刚王宇恩蒲超廷刘岑俐杨万锦朱勇万春竹白加林赵武智牛静邬小坤赵凌熊学海
Owner GUIZHOU POWER GRID 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