Pole tower earthing resistance quick testing method without unfastening wire and device

A technology of ground resistance and measurement method, applied in the direction of ground resistance measurement, etc., can solve problems such as low measurement efficiency, high labor intensity, and difficult engineering realization

Active Publication Date: 2006-09-06
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
View PDF0 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the current tower grounding resistance measurement is that it is difficult to realize the project. In the usual situation, when there are two or more grounding down-conductors, it is generally necessary to use an electric welding machine to weld the welded nuts during the measurement. ; or unscrew the nut
A measurement team of 3 to 4 people can only measure 4 to 5...

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
  • Pole tower earthing resistance quick testing method without unfastening wire and device
  • Pole tower earthing resistance quick testing method without unfastening wire and device
  • Pole tower earthing resistance quick testing method without unfastening wire and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] figure 1 It is a schematic diagram of a power transmission line, which is a power transmission tower with lightning protection wires and overhead ground wires. According to the basic idea of ​​the present invention, the following two technical methods are used to measure:

[0038] 1) figure 2 In order to use clamp PT and CT to measure the schematic diagram, use clamp voltage transformers (referred to as clamp PT) and clamp current transformers (referred to as clamp CT) with the same number of grounding down conductors as the tower grounding, and do not untie the tower grounding. For the down-leads, clamp the pliers PT and CT to all the grounding down-leads; or,

[0039] 2) image 3 In order to use strip-shaped PT, CT measurement schematic diagram, use strip-shaped voltage transformer for short (strip-shaped PT) and strip-shaped...

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

Wherein, with embed-meter method, applying split-core current transformer (PT) and split-core current transformer (CT) with same wire number as the tower ground wire to clamp all tower ground wires; or applying strip-shape PT and CT to enclose whole tower; filtering and analyzing the measured data to obtain the real and imaginary parts of fundamental wave component of voltage and current signals; calculating with special voltage-drop algorithm to obtain the target resistance. This invention improves efficiency, and reduces cost.

Description

technical field [0001] The invention belongs to the high-voltage technical field of electric power science, and relates to a method and device for measuring the grounding resistance of transmission poles and towers, in particular to a method and device for quickly measuring the grounding resistance of power transmission poles and towers. Technical aspects of safety maintenance of transmission towers. Background technique [0002] The grounding resistance value of transmission towers is of great significance for reducing the lightning tripping rate of transmission lines. It is particularly important to periodically measure the grounding resistance of transmission towers before they are put into use and during operation. The electric power industry standard DL / T 596-1996 "Preventive Test Procedures for Power Equipment" This has been expressly stipulated. Therefore, accurately, quickly and conveniently measuring the grounding resistance value of transmission towers is an impor...

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): G01R27/20
Inventor 李澍森陈晓燕陈绍英韩芳王亚军
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap