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Power transmission line grounding construction method

A construction method and transmission line technology, applied in the direction of circuits, line/collector components, connections, etc., can solve problems such as tower grounding resistance not meeting the requirements, lightning shielding, line tripping, etc., to prevent major construction quality accidents and Effects of Quality Management Incidents

Inactive Publication Date: 2016-04-20
STATE GRID CORP OF CHINA +2
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Problems solved by technology

As some towers are located in mountainous areas with poor geological conditions, the grounding resistance of many towers does not meet the requirements, and even the grounding resistance of many towers seriously does not meet the requirements, and the corrosion is serious, resulting in a low level of lightning resistance of the line, and frequent lightning shielding and counterattacks , causing the line to trip, affecting the safe and stable operation of the power grid

Method used

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  • Power transmission line grounding construction method

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Embodiment Construction

[0015] The technical solution of the present invention will be described in more detail below by taking a grounding project of an overhead line pole and tower as an example.

[0016] (1) Project introduction

[0017] (1) The tower section is a stone trough with a soil cover of less than 0.3 meters in rocky areas.

[0018] (2) The base of the tower legs is configured with high and low legs in all directions, and grounding devices should be laid on each base tower.

[0019] (3) Before the laying of the ground net, measure the resistivity of the soil, select the corresponding grounding device according to the measured soil resistivity, and check the drawings to check whether the required ground net material, buried depth, and length meet the requirements of the drawing. The statistics are as follows:

[0020]

[0021] (2) Construction instructions

[0022] (1) The grounding steel used in this bid section is all hot-dip galvanized.

[0023] (2) Earthwork for grounding devic...

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Abstract

The invention relates to a power transmission line grounding construction method, and the method comprises the following steps: S1, digging a grounding groove; S2, laying a grounding device; S3, connecting the grounding device; S4, refilling the grounding groove; S5, measuring grounding resistance. The beneficial effects of the invention are that the method can meet the requirements of excellent standards of national construction inspection rules and quality evaluation standard rules, guarantees the zero-defect hand-over of an electric pole construction project, and avoids severe construction quality accidents and quality management accidents.

Description

technical field [0001] The invention relates to the technical field of transmission line grounding, in particular to a transmission line grounding construction method. Background technique [0002] The grounding of overhead line towers is very important to the safe and stable operation of the power system. Due to the high grounding resistance of towers, there are quite a lot of lightning flashover accidents. Reducing the grounding resistance of the tower is the main measure to improve the line lightning resistance level of the overhead line tower and reduce the lightning tripping rate. As some towers are located in mountainous areas with poor geological conditions, the grounding resistance of many towers does not meet the requirements, and even the grounding resistance of many towers seriously does not meet the requirements, and the corrosion is serious, resulting in a low level of lightning resistance of the line, and frequent lightning shielding and counterattacks , causi...

Claims

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Application Information

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IPC IPC(8): H01R43/00H01R4/66
Inventor 郭光李雪峰李成王飞杜磊吴国松
Owner STATE GRID CORP OF CHINA
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