Method and device for protecting power facility grounding net

A technology for power facilities and grounding grids, which is applied in the field of protection methods and devices for power facilities grounding grids, which can solve the problems of high equipment replacement costs, large resistance, and short life of grounding grids, and achieve the effects of saving funds, less investment, and prolonging life

Active Publication Date: 2010-12-15
边耀维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method and device for protecting the grounding grid of electric power facilities, the purpose of which is to suppress the occurrence of corrosion of the grounding grid by reducing the potential of the grounding body, provide protection for the grounding grid, and solve the problem of short service life of the grounding grid, high resistance, and high equipment replacement costs The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Chongxin County Huanghua 35kv substation, the substation ground network protection area is 740m 2 , the soil resistivity is 13.58 ohm. The sacrificial anode is made of zinc alloy. Each sacrificial anode block weighs 15 kg. There are 51 sacrificial anode blocks and 1 reference electrode. The grounding grid material is galvanized, and the surface is coated with graphite Powder, zinc powder, and varnish are prepared according to the ratio of 0.5:1:3 and a proper amount of thinner is added to the conductive paste. The thickness of the coating is 1mm. The surrounding of the grounding grid should be backfilled with fillers. The sodium is prepared according to the ratio of 50:45:5, and the thickness of the filler is 30 cm. The sacrificial anode block is placed in the center of the filler bag, and the thickness of the filler around the sacrificial anode block is 15 cm. The filler is made of bentonite, gypsum powder, and anhydrous sodium sulfate in a ratio of 50:45:5. Stir the ...

Embodiment 2

[0016] Weirong 35kv substation in Jingning County, the protection area of ​​the substation's ground network is 730m 2 , the soil resistivity is 13.35 ohm. The sacrificial anode is made of zinc alloy. Each sacrificial anode block weighs 15 kg. There are 50 sacrificial anode blocks and 1 reference electrode. The grounding grid material is galvanized, and the surface is coated with graphite Powder, zinc powder, and varnish are prepared according to the ratio of 0.5:1:3 and a proper amount of thinner is added to the conductive paste. The thickness of the coating is 1mm. The surrounding of the grounding grid should be backfilled with fillers. The sodium is prepared according to the ratio of 50:45:5, and the thickness of the filler is 30 cm. The sacrificial anode block is placed in the center of the filler bag, and the thickness of the filler around the sacrificial anode block is 15 cm. The filler is made of bentonite, gypsum powder, and anhydrous sodium sulfate in a ratio of 50:45:...

example 3

[0018] Zhudian 35kv substation in Zhuanglang County, the protection area of ​​the substation's ground network is 751m 2 , the soil resistivity is 13.36 ohm. The sacrificial anode is made of zinc alloy. Each sacrificial anode block weighs 15 kg. There are 51 sacrificial anode blocks and 1 reference electrode. The grounding grid material is galvanized, and the surface is coated with graphite Powder, zinc powder, and varnish are prepared according to the ratio of 0.5:1:3 and a proper amount of thinner is added to the conductive paste. The thickness of the coating is 1mm. The surrounding of the grounding grid should be backfilled with fillers. The sodium is prepared according to the ratio of 50:45:5, and the thickness of the filler is 30 cm. The sacrificial anode block is placed in the center of the filler bag, and the thickness of the filler around the sacrificial anode block must not be 15 cm. The filler is made of bentonite, gypsum powder, and anhydrous sodium sulfate in a rati...

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Abstract

The invention relates to a corrosion prevention technology for grounding net metal materials, in particular to a method and a device for protecting a power facility grounding net. Focused on an electrochemical corrosion principle, the invention meets the requirement on grounding net protection in different soil environments by reducing the potential of a grounding body for inhibiting grounding net corrosion and by selecting different materials, technologies and methods, including surface treatment of grounding net materials, the material, the weight, the quantity, cladding materials of sacrificial anodes, and connecting and installation mode. By reducing the potential of the grounding body for inhibiting grounding net corrosion, a grounding net is protected and the problems of short service life and large resistance of the grounding net and high equipment replacement cost can be solved. The corrosion prevention technology is simple and practicable, reduces the grounded resistance of the grounding net to below 0.3 ohm averagely after being implemented, needs low investment, can prolong the service life of the grounding net and can achieve very remarkable economic benefits.

Description

technical field [0001] The invention relates to a corrosion protection technology for metal materials of grounding grids, in particular to a method and device for protecting grounding grids of electric power facilities. Background technique [0002] The grounding grid occupies a very important position in power grid power plants, lines, and substations. Its function is to introduce fault currents into the ground and provide reference potentials for the equipment. Most of the grounding grid materials in my country are ordinary carbon steel, which is more susceptible to corrosion in the soil, and the degree of corrosion mainly depends on the protective measures used to protect structures and equipment and the corrosion characteristics of the environment. [0003] At present, in order to prevent corrosion, substations generally use galvanized steel as the grounding grid material. Tests have shown that when hot-dip galvanized steel is electrolytically corroded with leakage curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/06C23F13/16
Inventor 边耀维
Owner 边耀维
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