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Grounding resistance calculation method and device of tower grounding device and terminal equipment

A grounding device and grounding resistance technology, applied in the direction of grounding resistance measurement, etc., can solve the problem of inaccurate resistance value of grounding resistance

Active Publication Date: 2021-01-29
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a grounding resistance calculation method, device and terminal equipment of a tower grounding device, which are used to solve the existing technical problem that the grounding resistance value of the tower grounding resistance is inaccurately measured by using a three-pole method or a clamp meter method

Method used

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  • Grounding resistance calculation method and device of tower grounding device and terminal equipment
  • Grounding resistance calculation method and device of tower grounding device and terminal equipment
  • Grounding resistance calculation method and device of tower grounding device and terminal equipment

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Embodiment 1

[0077] figure 1 It is a flow chart of the steps of the grounding resistance calculation method of the tower grounding device described in the embodiment of the present invention, figure 2 It is the grounding resistance test equivalent resistance network circuit diagram of the grounding resistance calculation method of the tower grounding device described in the embodiment of the present invention, image 3 It is the first multi-terminal network circuit model diagram of the grounding resistance calculation method of the tower grounding device described in the embodiment of the present invention, Figure 4 It is the second multi-terminal network circuit model diagram of the grounding resistance calculation method of the tower grounding device described in the embodiment of the present invention, Figure 5 It is the third multi-terminal network circuit model diagram of the tower grounding device according to the grounding resistance calculation method of the tower grounding dev...

Embodiment 2

[0163] The embodiment of the present invention also provides a grounding resistance calculation device for a tower grounding device, which is applied to a power transmission tower, and uses a grounding resistance testing device to test the current of the tower grounding device. The tower grounding device includes a tower structure, and the tower structure includes at least four tower feet and the tower body, the grounding resistance calculation device of the tower grounding device includes a measurement wiring unit, a current measurement unit and an analysis calculation unit, and the current measurement unit includes a first measurement subunit, a second measurement subunit and a third measurement subunit;

[0164] The measurement wiring unit is used to select one tower foot of the tower grounding device as the measurement point, the grounding wires of the other three tower feet of the tower grounding device are all disconnected from the tower structure, and the grounding wires ...

Embodiment 3

[0184] The embodiment of the present invention also provides a computer-readable storage medium. The computer storage medium is used to store computer instructions. When the computer is run on the computer, the computer executes the above grounding resistance calculation method of the tower grounding device.

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Abstract

The invention relates to a grounding resistance calculation method and device for a tower grounding device and terminal equipment, which are applied to a power transmission tower. The current of the tower grounding device is measured by adopting a non-contact current measurement unit under three wiring modes and different voltage excitation signals, and three groups of measured current data are obtained and are subjected to analysis calculation to obtain the grounding resistance of the tower grounding device. According to the method for calculating the grounding resistance of the tower grounding device, the influence of mutual resistance in the measurement process is shielded by adopting three wiring modes, so that the obtained grounding resistance value data of the tower grounding deviceis accurate, the problem that the resistance value of the grounding resistor measured by adopting a three-pole method or a clamp meter method for the tower grounding resistor is inaccurate is solved.The grounding resistance testing device does not need on-site wiring in the process of measuring the grounding resistance of the tower grounding device, and the non-contact measurement enables the operation to be simple and is easy to implement on site.

Description

technical field [0001] The invention relates to the technical field of lightning protection and grounding, in particular to a grounding resistance calculation method, device and terminal equipment of a tower grounding device. Background technique [0002] Overhead transmission lines are an important part of the power grid. Due to their long-term exposure to the atmospheric environment, they have become the weakest link in power equipment subjected to lightning strikes. The reliability of their lightning protection operation directly determines the safety of power system operation. In my country, lightning This is especially true in the southern region where the activity is intense, and lightning damage to transmission lines is frequent, making lightning protection the most basic work for the operation of transmission lines. [0003] The effective dredging of the lightning current on the transmission line is the key to the lightning protection work of the transmission line. Th...

Claims

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Application Information

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IPC IPC(8): G01R27/20
CPCG01R27/20
Inventor 李谦胡晓晖魏俊涛
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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