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Annular parallel gap lightning protection device for overhead circuit insulator string

A technology of insulator strings and overhead lines, applied in the field of lightning protection devices, to achieve the effect of standardization of design, uniform end electric field, and improvement of electric field distribution

Inactive Publication Date: 2012-10-03
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a ring-shaped parallel gap lightning protection device for overhead line insulator strings in view of the shortcomings of the existing overhead line insulator series-parallel gap lightning protection device

Method used

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  • Annular parallel gap lightning protection device for overhead circuit insulator string
  • Annular parallel gap lightning protection device for overhead circuit insulator string
  • Annular parallel gap lightning protection device for overhead circuit insulator string

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as Figure 1~3 As shown, a ring-shaped parallel gap lightning protection device for 110kV overhead line insulator strings is to connect a pair of metal electrodes in parallel at both ends of the insulator string 1 of the overhead line. It is characterized in that: one metal electrode in the pair of metal electrodes is mainly composed of a ring electrode 2, a rod-shaped electrode 3, an "L"-shaped connecting rod 5 and a metal clamp 4 and the like.

[0032] The ring electrode 2, the rod-shaped electrode 3 and the "L"-shaped connecting rod 5 are all carbon steel metal rods with a diameter of 15mm.

[0033] The ring electrode 2 is an open ring of a metal rod with an inner diameter of 300mm. Weld one of the "L"-shaped connecting rods 5 on one end face of the opening of the ring electrode 2 opening, so that the ring-shaped parallel electrode is fixedly connected to the end of the metal piece at one end of the overhead line insulator string The ring electrode 2 with an o...

Embodiment 2

[0038] A ring-shaped parallel gap lightning protection device for 220kV overhead line insulator strings, same as embodiment 1, wherein:

[0039] The ring electrode 2, the rod electrode 3 and the connecting rod 5 are all carbon steel metal rods with a diameter of 18 mm. The ring electrode 2 is a metal rod with an inner diameter of 350 mm. The length of the electrode 3 is 300mm, the spherical diameter of the rod-shaped electrode 3 is 45mm, the vertical rod length of the "L"-shaped connecting rod 5 is 30mm, and the horizontal rod length is 350mm.

[0040] The distance between the spherical ends of the rod-shaped electrodes 3 in the parallel gap is 1744mm.

Embodiment 3

[0042] A ring-shaped parallel gap lightning protection device for 220kV overhead line insulator strings, same as embodiment 1, wherein:

[0043] The ring electrode 2, the rod electrode 3 and the connecting rod 5 are all carbon steel metal rods with a diameter of 20 mm. The ring electrode 2 is a metal rod with an inner diameter of 400 mm. The length of the electrode 3 is 400mm, the spherical diameter of the rod-shaped electrode 3 is 50mm, the vertical rod length of the "L"-shaped connecting rod 5 is 50mm, and the horizontal rod length is 400mm.

[0044] The distance between the spherical ends of the rod-shaped electrodes 3 in the parallel gap is 3780mm.

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Abstract

The invention discloses an annular parallel gap lightning protection device for an overhead line insulator string, which belongs to the technical field of lightning protection devices for overhead lines. The device comprises a pair of metal electrodes connected in parallel with two ends of the overhead line insulator string, and each metal electrode mainly consists of an annular electrode, a bar-shaped electrode, an L-shaped connecting rod and a metal clamp. The protection device has dual functions of a parallel gap and a piezometer ring, light weight, component standardization, strong universality, convenience in installation and convenience in regulating space between the parallel gaps, can be used for the lightning protection of the overhead lines at different voltage levels, and has strong practicality and a wide application range. The invention can be widely used for the overhead line lightning protection of different voltage levels in the electrical power system.

Description

technical field [0001] The invention belongs to the technical field of lightning protection devices for electric power overhead lines, and in particular relates to a supplementary lightning protection device for lightning protection of overhead lines. Background technique [0002] The lightning tripping fault of overhead lines is a difficult problem affecting the safe power supply of power grids all over the world. Today's lightning accidents still account for a large proportion of all tripping accidents on the line, especially in the southern region. According to the lightning protection operation data of Guangdong power grid lines, there were 650 lightning trips on 110kV and above lines in 2008, accounting for 62.3% of the total line trips; more than 50% of power system accidents in Japan were caused by lightning strikes on transmission lines. Lightning faults often cause line insulation damage, cause blackout accidents, cause direct economic losses to the power sector, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T4/10H01T4/08H01T4/02
Inventor 杨庆司马文霞廖永利袁涛罗兵叶轩谭威李锐海
Owner CHONGQING UNIV
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