Laying method of copper bar streamline for preventing electromagnetic interference of secondary cable of transformer substation

An anti-electromagnetic interference, secondary cable technology, applied in distribution substations, cable installation, cable installation in underground pipelines, etc., can solve the problems such as the laying method and laying standard of the copper drainage line are not given

Pending Publication Date: 2021-08-24
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, studies have found that copper drain wires play an important role in the EMI protection of secondary cables, but no specific laying methods and laying standards for copper drain wires have been given, so further research and application in this area is needed

Method used

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  • Laying method of copper bar streamline for preventing electromagnetic interference of secondary cable of transformer substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The invention provides a method for laying copper drainage wires for substation secondary cables to prevent electromagnetic interference. The laying method includes the following steps,

[0040] (1) Lay a cable with a length of 10m and a cross-sectional area of ​​40×4mm parallel to the secondary cable in the cable trench 2 The copper drain line, the surface of 10m×4mm is in the upper and lower positions;

[0041] The copper drain wire is located below the secondary cables.

[0042] (2) An L-shaped corner copper bar for connecting the two is arranged at intervals between the copper bar flow line and the grounding grid flat steel bar; the shape of the L-shaped corner copper bar is L-shaped.

[0043] Use 40×4mm every 7~8m from the end of the copper drain line and the flat steel of the grounding grid 2 The L-shaped corner copper bars are respectively connected with the copper bar streamlines and the grounding grid flat steel, and the L-shaped corner copper bars are arrang...

Embodiment 2

[0047] The invention provides a method for laying copper drainage wires for substation secondary cables to prevent electromagnetic interference. The laying method includes the following steps,

[0048] (1) Lay a cable with a length of 10m and a cross-sectional area of ​​40×4mm parallel to the secondary cable in the cable trench 2 The copper drain line, the surface of 10m×4mm is in the upper and lower positions;

[0049] The copper drain wire is located below the secondary cables.

[0050] (2) An L-shaped corner copper bar for connecting the two is arranged at intervals between the copper bar flow line and the grounding grid flat steel bar; the shape of the L-shaped corner copper bar is L-shaped.

[0051] Use 40×4mm every 7~8m from the end of the copper drain line and the flat steel of the grounding grid 2 The L-shaped corner copper bars are respectively connected with the copper bar streamline and the flat steel of the grounding grid, and the L-shaped corner copper bars are ...

Embodiment 3

[0058] The invention provides a method for laying copper drainage wires for substation secondary cables to prevent electromagnetic interference. The laying method includes the following steps,

[0059] (1) Lay a cable with a length of 10m and a cross-sectional area of ​​40×4mm parallel to the secondary cable in the cable trench 2 The copper drain line, the surface of 10m×4mm is in the upper and lower positions;

[0060] The copper drain wire is located below the secondary cables.

[0061] (3) An L-shaped corner copper bar for connecting the two is arranged at intervals between the copper bar streamline and the grounding grid flat steel; the shape of the L-shaped corner copper bar is L-shaped.

[0062] The upper end of the L-shaped corner copper bar is connected with the copper bar streamline by bolts;

[0063] The lower end of the L-shaped corner copper bar is connected with the flat steel of the grounding grid through bolts.

[0064] Several flange bolt holes are set on th...

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PUM

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Abstract

The invention relates to a laying method of a copper bar streamline for preventing electromagnetic interference of a secondary cable of a transformer substation, and the laying method comprises the following steps: (1) laying a copper bar streamline in a cable trench; (2) L-shaped corner copper bars used for connecting the copper bar streamline and the grounding grid flat steel being arranged between the copper bar streamline and the grounding grid flat steel at intervals; and (3) the secondary cable being electrically connected with the copper bar streamline. According to the laying method, the operation safety of the secondary cable and the relay protection equipment can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of anti-electromagnetic interference for cables, and in particular relates to a method for laying copper drainage streamlines for secondary cables in substations for anti-electromagnetic interference. Background technique [0002] The core wire of the secondary cable of the substation is used to connect the primary equipment and the relay protection equipment, and the sheath of the secondary cable of the substation is connected to the main grounding grid. When the power frequency short-circuit current or lightning current is injected into the main grounding network, the secondary cable will generate a core-skin potential difference, which may cause damage to the secondary cable or secondary equipment; at the same time, the secondary cable shielding layer will flow through some current, which may cause the secondary cable to burn. Therefore, it is of great significance to protect the secondary cables from el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/20H02B1/16H02G9/06H02B7/06H01R4/02H01R4/30
CPCH02B1/20H02B1/16H02G9/06H02B7/06H01R4/30H01R4/029
Inventor 刘胜军殷彦增龚乐乐沈辰佟智勇郭猛刘钊齐红斌
Owner STATE GRID CORP OF CHINA
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