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Single-lightening-conductor lightning protection method for erecting power transmission lines on same corridor

A single lightning protection line and transmission line technology, applied in the installation of cables, electrical components, installation of lighting conductors, etc., can solve undiscovered problems, save materials and investment, and improve the effect of lightning protection

Active Publication Date: 2014-08-27
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of erecting transmission lines in the same corridor, considering the shielding effect between adjacent lines, the method of designing a single lightning protection line has not been found in the power field.

Method used

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  • Single-lightening-conductor lightning protection method for erecting power transmission lines on same corridor
  • Single-lightening-conductor lightning protection method for erecting power transmission lines on same corridor
  • Single-lightening-conductor lightning protection method for erecting power transmission lines on same corridor

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] figure 1 It is a schematic diagram of the lightning protection effect of the present invention; figure 2 It is a schematic diagram of lightning strike distance and formed exposure arc to the first single lightning conductor, conductor, and earth on the first iron tower in the present invention;

[0025] Such as figure 1 , figure 2 Shown: a single lightning protection line lightning protection method for erecting transmission lines in the same corridor, including the following steps:

[0026] First, according to the voltage level of the transmission line, the height of the conductor, the cross section, the number of splits and the insulation level of the insulator string, the minimum shielding current of the lightning shielding conductor is calculated; then according to the minimum shielding current, using the EGM electrical geomet...

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Abstract

The invention discloses a single-lightning-conductor lightning protection method for erecting power transmission lines on the same corridor. The method includes the steps that firstly, according to voltage grades, wire heights, sections and split numbers and insulation levels of insulator strings of the power transmission lines, the minimum shielding failure current of shielding failure on wires by thunder and lightning is calculated; furthermore, an EMG electric geometrical model method is used for calculating the distances of striking a single lightning conductor on a first iron tower, the wire and the ground by the thunder and lightning; by the utilization of calculated numerical values and installation position of the single lightning conductor on the first iron tower, first intersection point coordinates of a single-lightning-conductor shielding arc and a wire exposure arc on the first iron tower are calculated through using the EMG electric geometrical model method again; according to the first intersection point coordinates, the position of a second iron tower erected on the same corridor is determined in a symmetrical mode. In the process of erecting the power transmission lines on the same corridor, the lightning protection effect can be improved, two lightning conductors on the inner sides of the two iron towers are omitted, material and investment are greatly saved, and reference bases are provided for designing the power transmission lines.

Description

technical field [0001] The invention relates to a lightning protection method for lines erected by electric power transmission iron towers, in particular to a single lightning protection line lightning protection method for erecting transmission lines in the same corridor, and belongs to the field of electric power transmission. Background technique [0002] The transmission line of the power system has a long distance and a large span, and the probability of being struck by lightning is high, and lightning strikes occur from time to time. The lightning strikes suffered by the transmission line are divided into shielding strikes and counterattacks. The counterattack mainly shows that the lightning strikes the top of the iron tower or the lightning protection line causes the potential of the top of the tower to rise. Induced lightning current. Therefore, for transmission lines of 220kV and above, lightning protection lines should be erected across the board. [0003] For co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G13/00
Inventor 马军王作民吴锁平赵新宇张瑞永陶礼学万之全姚成赵纪倩
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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