Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method of testing geodetic network earthing resistance

A grounding resistance and earth technology, which is used in grounding resistance measurement, resistance/reactance/impedance measurement, and electrical variable measurement. Find problems such as grounding grid corrosion, and achieve the effect of reducing workload

Inactive Publication Date: 2016-03-23
STATE GRID ZHEJIANG ELECTRIC POWER COMPANY TAIZHOU POWER SUPPLY +2
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for testing the grounding resistance of the grounding grid, which overcomes the fact that the corrosion of the grounding grid cannot be effectively found, the breakpoint cannot be effectively found, and the impedance distribution of each point of the grounding grid cannot be clearly seen. , which requires a large area of ​​excavation to find the ground grid corrosion

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 of testing geodetic network earthing resistance
  • Method of testing geodetic network earthing resistance
  • Method of testing geodetic network earthing resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Such as figure 1 As shown, firstly, the grounding network is equivalent to a pure resistance network, and each conductor represents a resistance. The current or voltage is injected into the grounding network through the grounding lead and the corresponding port data is collected, and the port resistance between the two grounding leads can be calculated.

[0027] The specific measuring device includes a measuring instrument 22, a current source 21, a grounding grid 11, a grounding lead 13, and a standard matching resistance R. The terminal resistance of the grounding grid can be better measured by this measuring device.

[0028] Such as figure 2 As shown, the grid current direction is clockwise, the entire grounding network can be divided into n grids, m current sources, and n-m independent equations can be listed, that is, n-m independent grid currents, where the port resistance is R2, and the port side The grid resistance is equivalent to R1, the grid resistance on 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 method of testing geodetic network earthing resistance, comprising the steps of: first, making an earthing network formed by earthing resistance equivalent to a pure resistance network, each segment of conductor representing a resistor; then, injecting current into the earthing network through an underground lead wire, collecting corresponding port data, calculating the port resistance between two earthing lead wires, and obtaining the resistance value of each segment of conductor; and finally, comparing the resistance value with a complete resistance value to obtain the corrosion degree and breakpoint case of an earthing network conductor. The method can accurately calculate the resistance between any two points in earthing resistance grid resistors, so as to accurately determine which segment of resistor breaks down, perform accurate excavation through a calculated resistance distribution case, and not waste manpower and material resources.

Description

technical field [0001] The invention relates to a grounding resistance testing technology, in particular to a method for testing the grounding resistance of a geodetic grid. Background technique [0002] The grounding network is a network that connects multiple grounding bodies with grounding trunk lines. It has the characteristics of reliable grounding and small grounding resistance, and is suitable for the grounding needs of a large number of electrical equipment. At present, it is widely used in substations. [0003] Substation grounding currently evaluates the defects of the grounding grid by measuring the grounding resistance, step voltage, and contact potential, but the corrosion of the grounding grid cannot be effectively found, especially the breakpoint. [0004] At present, the corrosion of the ground grid is generally checked by excavation, and the corrosion of the excavation point is checked, but some local defects cannot be found, and the heavy workload is not co...

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): G01R27/20
CPCG01R27/205
Inventor 吴健王昕曾晓张东波郑德富项弋力奚斌朱亮朱瑾王杰何冰黄镇
Owner STATE GRID ZHEJIANG ELECTRIC POWER COMPANY TAIZHOU POWER SUPPLY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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