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Power transmission line tower grounding design method and device

A technology of power transmission lines and grounding devices, applied in the field of power transmission, can solve the problems of reducing grounding impedance and poor economy.

Pending Publication Date: 2020-12-11
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a grounding design method and device for transmission line towers, which solves the problems of blind pursuit of reducing grounding impedance and poor economy in the prior art

Method used

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  • Power transmission line tower grounding design method and device
  • Power transmission line tower grounding design method and device
  • Power transmission line tower grounding design method and device

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Embodiment Construction

[0040] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0041] The method provided in the first embodiment of the present application is described in detail.

[0042] Step S101, determining the control target of the transmission line counter-flashover rate and the grounding impedance limit value of different soil resistivity levels.

[0043] For the entire transmission line, the lightning protection performance of the grounding system is determined by the overall flashover rate of the line. The counterattack flashover rate of the line is not only related to the lightning...

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Abstract

The invention discloses a power transmission line tower grounding design method and device. The method comprises the steps: determining a control target of the counterattack flashover rate of a powertransmission line and grounding impedance limit values of different soil resistivity gears; dividing the power transmission line into a plurality of sections along the power transmission line according to the soil resistivity grades; determining the counterattack flashover rate of each section according to the terrain category and the lightning day parameters in each section along the power transmission line; according to the control target of the counterattack flashover rate of the power transmission line, adjusting the whole line counterattack flashover rate of the power transmission line byadjusting the grounding impedance limit values of different soil resistivity levels; taking the adjusted grounding impedance limit values of different soil resistivity levels as control values of tower grounding impedance of each section of the power transmission line; and according to the control value of the tower grounding impedance, designing the structure and the size of the power transmission line tower grounding device. The problems that in the prior art, the grounding impedance is blindly pursued to be reduced, and economy is poor are solved.

Description

technical field [0001] The present application relates to the technical field of power transmission, in particular to a grounding design method for power transmission line towers and a grounding design device for power transmission line towers. Background technique [0002] With the prosperity and progress of the social economy, the demand for electricity is increasing, the power grid is developing rapidly, and the construction scale and density of high-voltage transmission lines are also increasing. Transmission lines inevitably pass through different areas such as mountains, plains, farmland, and towns, and more and more attention has been paid to the safety and reliability of power transmission. As an important channel for lightning discharge current, the grounding system is a basic measure to maintain the safe and stable operation of the power grid. The grounding impedance of the tower grounding device directly determines the potential of the tower top, thereby affecting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20G06Q50/06
CPCG06F30/17G06F30/20G06Q50/06
Inventor 童雪芳董晓辉范冕谭波王湘汉王磊李晓岚何慧雯
Owner CHINA ELECTRIC POWER RES INST
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