A detection method for the effective length of the grounding pole impact of a transmission line tower

A technology of transmission line and effective length, applied in the direction of grounding resistance measurement, measuring device, measuring electric variable, etc.

Active Publication Date: 2021-11-09
SOUTHWEST JIAOTONG UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as lightning protection is concerned, the impact characteristics of the grounding device and its power frequency characteristics are quite different

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
  • A detection method for the effective length of the grounding pole impact of a transmission line tower
  • A detection method for the effective length of the grounding pole impact of a transmission line tower
  • A detection method for the effective length of the grounding pole impact of a transmission line tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The schematic diagram of the shock dissipation process of the horizontal grounding body of the transmission line tower is attached figure 1 As shown, point 1 is the position where the impulse current is injected into the grounding body, and the shaded area in the figure indicates the diffused area. Figure 1 It can be seen that from the moment of impulse current injection, the current density of the horizontal grounding body is the highest at the current injection point, and the area where the flow flows to the ground due to the inductance of the conductor is mainly concentrated near the current injection point. With the longitudinal propagation of the impulse current, the part of the grounding body that participates in the flow to the soil continues to increase, until the entire conductor participates in the flow to...

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 detection method for the impact effective length of the ground electrode of a transmission line pole tower. By testing the impact ground resistance of the ground electrode and judging the effective length of the ground electrode according to the obtained impulse voltage response, the transient impedance of the ground body is calculated and its wave is judged. The relationship between the tail impedance and the impact grounding resistance determines whether the grounding electrode has reached the effective length. The method of the present invention is simple to calculate and has clear physical meaning. It can not only detect the effective length of the grounding body, but also analyze its impact characteristics through the impedance relationship of the grounding body, which is beneficial to the evaluation of the safety performance of the grounding device and provides a basis for the transformation and optimization of its structure. .

Description

technical field [0001] The invention belongs to the field of electric power system overvoltage, and in particular relates to a detection method for the impact effective length of a ground pole of a power transmission line tower. Background technique [0002] With the gradual increase of the voltage level of transmission lines, accidents caused by lightning strikes on transmission lines are also increasing. When the lightning wave hits the tower or the lightning conductor, most of the lightning current will flow into the earth through the grounding device. If the grounding resistance is too high, the lightning current will generate a very high overvoltage on the top of the tower, causing the insulator to flash over and causing the line to jump. Therefore, the lightning protection performance of the transmission line is related to the impact grounding resistance of the grounding device. Single or multiple horizontal long conductors are the main form of tower grounding. In ar...

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 Patents(China)
IPC IPC(8): G01R27/20G01R27/08
CPCG01R27/08G01R27/205
Inventor 曹晓斌魏铭李瑞芳王满想王海鳗陈思奇刘家材
Owner SOUTHWEST JIAOTONG UNIV
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