Transmission line surge diversion grounding device

A grounding device and transmission line technology, applied in the direction of connecting contact materials, etc., can solve the problems of large construction work volume and easy corrosion of the grounding system, and achieve the effects of reducing the difficulty of excavation, low surface current density, and easy transportation

Active Publication Date: 2019-04-12
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a surge diversion grounding device for transmission lines, which ca

Method used

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  • Transmission line surge diversion grounding device
  • Transmission line surge diversion grounding device
  • Transmission line surge diversion grounding device

Examples

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Example Embodiment

[0025] Such as Figure 1 to Figure 3 As shown, a surge diversion grounding device for a transmission line includes a grounding body and an outer sheath, and the grounding body and the outer sheath can be contacted by a parallel connection mechanism to realize the fixation of the two.

[0026] The grounding body includes an inner core 21, and the inner core may be inorganic fiber or synthetic fiber,

[0027] The scheme is refined, and the inner core 21 can be selected from carbon fiber, polyaniline fiber or anti-oxidation alloy fiber depending on the electrical conductivity requirement.

[0028] An expanded graphite composite layer 22 is provided on the outer side of the inner core, and superconducting carbon black and nano nickel powder are added to the expanded graphite composite layer material as modified additives.

[0029] The scheme is refined, and the expanded graphite composite layer is added with a water emulsion type conductive adhesive.

[0030] The use of the expanded graphi...

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Abstract

The invention discloses a transmission line surge diversion grounding device, and relates to the field of power equipment. The transmission line surge diversion grounding device comprises a groundingbody and an outer sheath, wherein the grounding body is in contact with the outer sheath through a parallel connection mechanism; the grounding body comprises an inner core, and an expanded graphite composite layer is arranged on the outer side of the inner core; the grounding body is connected in the outer sheath in a sleeved mode; and the outer sheath comprises an outer sleeve membrane and an inner sleeve membrane, a plurality of elastic supporting wires are arranged between the outer sleeve membrane and the inner sleeve membrane, and concrete is filled between the outer sleeve membrane andthe inner sleeve membrane. According to the device, the skin effect can be effectively reduced, the surface layer current density is smaller, and the current distribution is more uniform. The inner core waterproof treatment is realized by using the outer sheath, so that the device is convenient to transport; and the grounding body and soil bear the same external force deformation, and the earth-rock excavation is not required to be straight and can be excavated along with the landform, so that the excavation difficulty is greatly lowered.

Description

technical field [0001] The invention relates to the field of power equipment, in particular to a power transmission line surge diversion grounding device. Background technique [0002] With the development of power system, accidents caused by lightning strikes are also increasing. According to incomplete statistics, lightning trips on power grid lines account for more than 70% to 80% of the total trips in the entire power grid, and more than 90% of lightning trips are caused by induction lightning, that is, lightning strikes occur near equipment, lines or cables. Inductive surge current is generated in the line or cable, and the surge current rushes into the power distribution facility along the line or cable, thus affecting the reliability of power supply. Only 10% of lightning accidents are caused by direct lightning strikes, so it is difficult to avoid lightning damage even if the cable is grounded. [0003] A good grounding system should meet the following two main con...

Claims

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Application Information

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IPC IPC(8): H01R4/66
CPCH01R4/66
Inventor 李静尹爱辉王宝勇于光远刘思华秦昌龙
Owner STATE GRID SHANDONG ELECTRIC POWER
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