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Constituting method for DC transmission deep well grounding electrode

A DC transmission and grounding electrode technology, which is applied in the direction of connecting contact materials, can solve the problems of short life, difficult operation and maintenance of grounding electrodes, etc.

Inactive Publication Date: 2006-10-18
STATE GRID CORP OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of ground electrode is difficult to operate and maintain, and has a short service life

Method used

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  • Constituting method for DC transmission deep well grounding electrode

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Embodiment Construction

[0007] Aiming at the problems existing in the above two types of grounding electrodes, the present invention proposes a construction method of deep vertical grounding electrodes leaded with coke. First, deep drilling is carried out on the ground surface 4. When a good conductive layer 6 in the deep earth is found, it is buried with coke 5 until it is near the ground surface 4, at a distance of about 0.3-2 meters, and then the ground electrode conductive rod 1 is inserted vertically. One end of it is inserted into the coke 4, and the other end protrudes a certain distance from the ground surface, and finally the deep well is filled to the ground surface with backfill soil 2.

[0008] With this new ground electrode type, the current flows directly from the steel rod into the coke body. Coke is a good conductor, and the current can directly enter the depth of the formation through the coke body, and will not spread on the ground surface, which is conducive to protecting the metal...

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Abstract

A method for preparing an earthing electrode of DC transmission deep well includes drilling deep well on the ground to discover excellent conducting layer at deep layer of ground, using coke to fill deep well till it is near ground surface and inserting contact rod of earthing electrode into coke layer vertical to let one end of said rod be inserted in coke and another end of it be exposed on the ground for certain distance and finally using backfill soil to fill up deep well up to the ground surface.

Description

technical field [0001] The invention relates to a construction method of an improved deep well grounding electrode for direct current transmission, and more specifically relates to a construction method of a deep well vertical grounding pole leaded with coke. Background technique [0002] At present, most of the grounding poles in DC transmission projects are designed in the way of shallow burial on the ground. Generally, conductive steel rods are laid within the depth range of 2-3 meters. In order to prevent the corrosion of the steel rods in the long-term conductive state, the steel rods are usually protected with coke. The surface ground electrode is generally in the form of a ring. However, this type of grounding electrode is sensitive to the conductive properties of geological soil, especially when the current cannot quickly enter the deep part of the earth's crust, and spread on the ground surface. The surface current forms a potential difference in a large range, an...

Claims

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Application Information

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IPC IPC(8): H01R4/66
Inventor 舒印彪刘泽洪袁清云高理迎
Owner STATE GRID CORP OF CHINA