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Intelligent control system and method for grounding resistance of grounding grids of transformer substation in high-altitude high-earth-resistivity area

A technology of intelligent control system and substation grounding grid, which is applied in the direction of control/regulation system, humidity control, non-electric variable control, etc., can solve problems such as difficult to meet grounding resistance requirements, grounding resistance rebound, difficult to cure, etc., to ensure power grid Safety and reliability of power supply, reduction of consumption, effects of avoiding accidents

Pending Publication Date: 2018-10-12
国网西藏电力有限公司拉萨供电公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: due to the combination of resistance reducing agent and water, when the water is dispersed, the grounding resistance will rebound, which has become a common problem of substation grounding grids in high soil areas in China, and it is difficult to cure; I have done many examples of drilling deep wells to reduce the resistance after the grounding resistance of the grounding grid is insufficient, and they all ended up with resistance rebounding after a few years
However, it is still difficult to meet the requirements of grounding resistance by using copper alone as the grounding grid.

Method used

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  • Intelligent control system and method for grounding resistance of grounding grids of transformer substation in high-altitude high-earth-resistivity area
  • Intelligent control system and method for grounding resistance of grounding grids of transformer substation in high-altitude high-earth-resistivity area

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Embodiment 1

[0066] This embodiment relates to a system for intelligently controlling the grounding resistance of substation grounding grids in areas with high altitude and high soil resistivity. The intelligent control system includes humidity control devices, water volume control devices, water injection pipes, water distribution pipes, horizontal grounding copper bars and graphite cloth. ; Among them, the underground distribution of water distribution pipes, horizontal grounding copper bars and graphite cloth is as follows figure 1 shown;

[0067] Described humidity control device comprises humidity sensor, humidity controller (single-chip microcomputer);

[0068] The humidity sensor is placed at the horizontal grounding copper bar for detecting the humidity of the soil environment, obtaining a real-time soil moisture value, and transmitting the soil moisture value to the humidity controller;

[0069] The humidity controller compares the real-time soil moisture value with the set humid...

Embodiment 2

[0077] This embodiment relates to a system for intelligently controlling the grounding resistance of substation grounding grids in areas with high altitude and high soil resistivity. The intelligent control system includes humidity control devices, water volume control devices, water injection pipes, water distribution pipes, horizontal grounding copper bars and graphite cloth. ; Among them, the underground distribution of water distribution pipes, horizontal grounding copper bars and graphite cloth is as follows figure 1 shown;

[0078] Described humidity control device comprises humidity sensor, humidity controller (computer);

[0079] The humidity sensor is placed at the horizontal grounding copper bar for detecting the humidity of the soil environment, obtaining a real-time soil moisture value, and transmitting the soil moisture value to the humidity controller;

[0080] The humidity controller compares the real-time soil moisture value with the set humidity value; when t...

Embodiment 3

[0088] This embodiment relates to a system for intelligently controlling the grounding resistance of substation grounding grids in areas with high altitude and high soil resistivity. The intelligent control system includes humidity control devices, water volume control devices, water injection pipes, water distribution pipes, horizontal grounding copper bars and graphite cloth. ; Among them, the underground distribution of water distribution pipes, horizontal grounding copper bars and graphite cloth is as follows figure 1 shown;

[0089] Described humidity control device comprises humidity sensor, humidity controller (computer);

[0090] The humidity sensor is placed at the horizontal grounding copper bar for detecting the humidity of the soil environment, obtaining a real-time soil moisture value, and transmitting the soil moisture value to the humidity controller;

[0091] The humidity controller compares the real-time soil moisture value with the set humidity value; when t...

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Abstract

The invention provides an intelligent control system and method for grounding resistance of grounding grids of a transformer substation in a high-altitude high-earth-resistivity area and belongs to the technical field of electric power electrical equipment maintenance systems. The intelligent control system includes a humidity control device, a water amount control device, a water injection pipe,a water distribution pipe, a horizontal grounding copper bar and graphite clothes. As the copper bar is arranged as the external grounding grid, the humidity control device conducts real-time monitoring on the soil humidity of the horizontal grounding copper bar of the main grounding grid, and when the soil humidity exceeds a specified value, the grounding resistance is lowered by means of water injection, so that it is ensured that the grounding resistance is maintained below 0.5 ohm for a long time, and the safety of a power grid and the power supply reliability are ensured. The system and method have the advantages of saving the cost, being economical, efficient, environmentally friendly and the like and have a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of electric power equipment maintenance systems, and in particular relates to a system and method for intelligently controlling the grounding resistance of a substation grounding grid in areas with high altitude and high soil resistivity. Background technique [0002] According to relevant data, the area of ​​110kV outdoor substations located in high-altitude and high-soil areas is generally 8,000 square meters. Flat steel is used as the horizontal ground grid, and angle steel or through-clad steel is used as the vertical ground electrode. The geology is dominated by weathered rock. The total grounding resistance is generally about 1.5 ohms, and it is difficult to drop below 0.5 ohms. In 2011, the 110kV indoor substation of the national grid general design A3-3 module was 2039 square meters, but the grounding resistance of the later grounding grid was higher, and some provinces have relaxed it to below 4 ohm...

Claims

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Application Information

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IPC IPC(8): G05D22/02H01R4/66
CPCH01R4/66G05D22/02
Inventor 达娃伦珠潘志远陶魁贡桑陶晓莉叶晓青王振龙
Owner 国网西藏电力有限公司拉萨供电公司
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