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Simulation Modeling Method of Grounding Resistance

A grounding resistance, simulation modeling technology, applied in design optimization/simulation, electrical digital data processing, instruments, etc., can solve problems such as large voltage difference between conductor and ground wire, counterattack tripping, etc.

Active Publication Date: 2019-02-12
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If there is an abnormal grounding when lightning strikes the tower, the pressure difference between the wire and the ground wire will be too large, resulting in a counter-attack tripping fault

Method used

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  • Simulation Modeling Method of Grounding Resistance
  • Simulation Modeling Method of Grounding Resistance
  • Simulation Modeling Method of Grounding Resistance

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Embodiment Construction

[0025] The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the enumerated embodiments are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0026] A simulation modeling method for grounding resistance, comprising the following steps:

[0027] see figure 1 , when the lightning strikes the lightning protection line, the lightning current propagates from the lightning strike point to both sides, so G0 is selected as the grounding resistance of the tower where the lightning strike point is located, and the grounding resistance of the towers from left to right starting from G0 is GR1, GR2, GR3, GR4, GR5, GR6, GR7, starting from G0, the grounding resistance of the towers from right to left is GL1, GL2, GL3, GL4, GL5, GL6, GL7;

[0028] see figure 2 , the lightning current is selected as a double exponential negative lightning wave with an ampli...

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Abstract

The invention discloses a simulation and modeling method of earthing resistors. The simulation modeling method of the earthing resistors comprises the following steps: selecting G0 as an earthing resistor of a tower in which a lightning strike point is located, taking G0 as a starting point so that the earthing resistors of the tower are successively GR1, GR2, GR3, GR4, GR5, GR6 and GR7 from leftto right, and taking G0 as a starting point so that earthing resistors of the tower are successively GL1, GL2, GL3, GL4, GL5, GL6 and GL7 from right to left; and then carrying out simulation and modeling on the earthing resistors. By influence of change of the earthing resistors to ground charge, abnormality of the earthing resistors can be discovered in time.

Description

technical field [0001] The invention relates to a modeling method, in particular to a simulation modeling method of grounding resistance. Background technique [0002] Lightning strike faults are the most frequent faults on transmission lines, and whether lightning strike faults can be effectively reduced depends to a large extent on the grounding conditions of the towers. If there is an abnormal grounding when lightning strikes the tower, the pressure difference between the wire and the ground wire will be too large, resulting in a counter-attack tripping fault. Early detection of abnormal grounding resistance of line towers can help electric power workers do a good job in lightning protection. Therefore, it is urgent to study methods that can realize online monitoring of grounding resistance and directly reflect impact grounding resistance. This method takes natural lightning as the signal source, and since the lightning itself is an impact signal, the grounding resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 赵海龙王思捷
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST