Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for measuring ground resistance of double ground network

A technology of grounding resistance and measurement method, which is applied in the field of measurement of grounding resistance of double grounding grids, and can solve the problems of reducing wiring length, wiring difficulties, and difficulty in measuring the distance between the main network and the auxiliary network.

Inactive Publication Date: 2011-01-05
SOUTHWEST JIAOTONG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the practical problem that it is difficult to measure the distance between the main network and the auxiliary network when the grounding network is used to reduce the grounding resistance in areas with high soil resistivity, the purpose of this invention is to provide a method for measuring the grounding resistance of the grounding system with double grounding networks. This method can reduce the length of wiring or solve the problem of difficult wiring when measuring the grounding resistance of double grounding grids

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 for measuring ground resistance of double ground network
  • Method for measuring ground resistance of double ground network
  • Method for measuring ground resistance of double ground network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] specific implementation

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings. Work flow diagram of the present invention is attached figure 1 shown. That is, the present invention comprises the following steps:

[0015] The first step is to add a power supply and an ammeter (as attached figure 2 shown), record the readings U and I of the power supply and ammeter, and then calculate r according to the following formula 0 :

[0016] r 0 = U I

[0017] For example, a 500kV substation in Yunnan, according to the attached figure 2 The method measures that U is 100V and I is 11.4A, from which the mutual resistance r between the main network and the auxiliary network can be calculated 0 into 8.8 ohms.

[0018] The second step is to measure the grounding resistance r of the main network and the auxiliary network 1 and r 2 . ...

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 for measuring the ground resistance of a double ground network when an external ground network is introduced to reduce the ground resistance. The method comprises the following steps: 1, determining the mutual resistance r0 of the double ground network; 2, measuring the ground resistance r1 of a primary network and the ground resistance r2 of a secondary network; and 3, determining the ground resistance R of the double ground network. The method is simple and convenient in computation and obvious in physical significance and solves the problem that it is troublesome to measure the wiring of the double ground network in engineering application.

Description

Technical field: [0001] The invention relates to a method for measuring grounding resistance, in particular to a method for measuring grounding resistance of double grounding grids, which is applicable to the measurement of grounding grounding resistance of double grounding grids when the grounding resistance is reduced by using external grounding grids in the field of electric power engineering construction. Background technique: [0002] Western my country is rich in hydropower resources. In recent years, many large-scale hydropower stations have been built. These power stations supply power to eastern cities through ultra-high voltage or ultra-high voltage AC and DC transmission lines. However, power stations, supporting substations or converter stations, and transmission lines are mainly located in mountainous areas, where the geological structure is complex and diverse, and the soil resistivity in some areas is as high as several thousand ohms, which brings great difficu...

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
Inventor 曹晓斌吴广宁周利军李瑞芳高国强高波朱军马御棠苏杰刘君
Owner SOUTHWEST JIAOTONG UNIV