A method for improving the lightning resistance performance of AC and DC co-frame lines

An AC/DC, line technology, applied in the configuration of the grounding wire, the spatial arrangement/configuration of the cable, etc., can solve the problems of unfavorable shielding lateral lightning strike, etc., and achieve the effect of small cost impact

Active Publication Date: 2018-10-23
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large vertical distance between the ground wire and the 220kV wire, it is not conducive to shielding the lateral lightning strike

Method used

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  • A method for improving the lightning resistance performance of AC and DC co-frame lines
  • A method for improving the lightning resistance performance of AC and DC co-frame lines
  • A method for improving the lightning resistance performance of AC and DC co-frame lines

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Embodiment Construction

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

[0028] In order to thoroughly understand the embodiments of the present invention, the detailed structure will be set forth in the following description. Obviously, the practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

[0029] Under the condition of not changing the original line pole tower and conductor type, install the bracket 6 on the AC conductor cross-arm of the single-circuit ±800k and double-circuit AC on the same tower and multi-circuit AC-DC co-erected line, and install the bracket 6 on the bracket 6 along the Lightning conductors are added to AC and DC lines. Through sim...

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Abstract

The invention discloses a method for improving lightning protection performance of an altering / direct current joint circuit. The method includes the steps that supports are arranged on altering current wire cross arms of the single-loop + / - 800 kv and double-loop altering current one-tower multi-loop altering / direct current joint circuit; lightning wires are arranged on lightning wire supports along the altering / direct current joint circuit; bypass ground wires are arranged on supports. By means of the technical scheme, the shielding failure trip-out rate of a 500 kv circuit located at the hilly area is reduced to be lower than 0.14 time / (100km.a), the shielding failure trip-out rate of a 220 kv circuit is reduced to be lower than 0.315 time / (100km.a), and the shielding failure trip-out rate of the 500 kv circuit and the shielding failure trip-out rate of the 220 kv circuit are equal to the lightning trip-out rate running value of the 500 kv circuit and the 200 kv circuit.

Description

technical field [0001] The invention relates to the field of lightning protection for super / ultra-high voltage transmission lines, in particular to a method for improving the lightning resistance performance of AC and DC co-framed lines. Background technique [0002] Lightning rods and lightning conductors are the most important means to prevent lightning strikes, and the transmission line is to prevent lightning from directly hitting the wires by erecting lightning conductors. In recent years, some unconventional lightning rods have also appeared. It is expected to enhance the lightning-inducing ability of the lightning rod through special design to achieve a better shielding effect. Taking the UHV double-circuit transmission line on the same tower as an example, the configuration scheme and shielding effect of multiple lightning conductors are calculated by using the established three-dimensional lightning shielding analysis model. The calculation results show that the sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/20H02G7/22
CPCH02G7/20H02G7/22
Inventor 殷禹贺子鸣葛栋时卫东贺恒鑫
Owner STATE GRID CORP OF CHINA
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