CN112582809A - Novel transformer substation grounding system - Google Patents
Novel transformer substation grounding system Download PDFInfo
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- CN112582809A CN112582809A CN202011239078.0A CN202011239078A CN112582809A CN 112582809 A CN112582809 A CN 112582809A CN 202011239078 A CN202011239078 A CN 202011239078A CN 112582809 A CN112582809 A CN 112582809A
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- grounding
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- blasting
- transformer substation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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Abstract
The invention discloses a novel transformer substation grounding system and a construction method thereof, which solve the problem of corrosivity of the existing transformer substation grounding system and the problem that the existing transformer substation grounding system construction method is small in application range and cannot be applied to regions with littering clusters and complex geological conditions; the technical scheme is as follows: the grounding device comprises a grounding net and a grounding rod or a grounding wire directly connected with the grounding net; the grounding material of the grounding net is a solid-liquid phase change material which has good conductivity and corrosion resistance; the grounding grid adopts a tree root type structure; and the grounding rod or the grounding wire is fixedly connected with the grounding grid at the pouring gate.
Description
Technical Field
The invention relates to the technical field of power transmission and transformation engineering design, in particular to a novel transformer substation grounding system.
Background
The grounding system with stable and good performance must be capable of timely dissipating the huge current or thunder and lightning current generated during the operation fault of the substation into the ground, so that the short-time overvoltage generated by the grounding resistor does not exceed the allowable value of the equipment, and the equipment is prevented from being damaged; meanwhile, the danger of high voltage impact on personnel in a transformer substation site is avoided, so that the serious influence on production and life caused by the huge personal and economic loss caused by accident faults is avoided.
With the increase of the short-circuit capacity of the high-voltage power grid and the reduction of the required value of the grounding resistance, the requirement on a grounding system for ensuring the safety of transformer substation equipment and a human body is higher and higher, and particularly in an area with high soil resistivity and poor grounding performance, the fault current or lightning current of the transformer substation cannot be instantaneously dissipated through the grounding grid, so that the integral or local potential of the transformer substation is increased, an insulating protective layer of the equipment is punctured, and the equipment is burnt out.
At present, the grounding system of a common substation of an electric power system in China generally adopts a composite grounding grid form combining a galvanized flat steel horizontal grounding grid and a galvanized angle steel vertical grounding electrode, and most of the used grounding materials adopt galvanized flat steel and galvanized angle steel. However, the galvanized steel has poor corrosion resistance, and the continuous corrosion of the zinc layer makes the grounding performance unstable, which can only meet the service life of 10 years.
The existing transformer substation grounding system is constructed in a mode of manually excavating and backfilling plain soil to cover after a grounding grid is installed, so that the construction efficiency is low, and a large amount of manpower and material resources are consumed; the existing construction mode is only suitable for plain areas with loose soil, and if the transformer substation is located in the areas with littering and complex geological conditions, the conventional construction mode of the transformer substation grounding system cannot be adopted.
Therefore, the traditional grounding system cannot effectively solve the engineering grounding problem under different geological environments, and cannot meet the new requirements of the grounding system.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a novel transformer substation grounding system, which can thoroughly solve the problem of corrosivity of the conventional grounding grid by applying a conductive phase-change material without welding or performing additional anti-corrosion treatment, and can design different specifications according to different soil resistivity areas, so that the conditions can be met according to the ground, the conductivity of the high-resistivity areas of the soil can be effectively improved, and the fault current or the lightning current of the transformer substation can be timely and instantaneously dissipated through the grounding grid.
The second purpose of the invention is to provide a construction method of a novel substation grounding system, which comprises the steps of setting the drilling depth, the drilling number, the blasting point position and the like of soil according to the soil hardness and the soil resistivity of areas where different substation grounding systems are located, so that the fault current or the lightning current can be instantly dissipated through a grounding grid no matter what resistivity soil environment the substation grounding system is in; and the method adopts a construction mode combining manual drilling and light blasting, can be applied to various regions with littering and complex geological conditions, avoids the process of manual excavation and backfilling, and greatly improves the construction efficiency and the application range of the grounding system of the transformer substation.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a novel substation grounding system, where the substation grounding system includes a grounding grid, and a grounding rod or a grounding wire directly connected to the grounding grid; the grounding material of the grounding net is a solid-liquid phase-change material with good conductivity and corrosion resistance.
As a further implementation, the grounding grid adopts a tree root structure.
As a further implementation manner, the grounding rod or the grounding wire is fixedly connected with the grounding grid at the pouring gate.
In a second aspect, an embodiment of the present invention further provides a method for constructing a novel substation grounding system, where the method for constructing a substation grounding system includes the following steps:
step one, determining the number of drilled holes, the depth of the drilled holes and the angle according to the soil hardness, the soil resistivity and the layering condition of the soil resistivity of the area where the transformer substation grounding grid is located.
And step two, determining the position of a blasting point and the specification and model of a blasting product according to the soil hardness, the soil resistivity and the soil resistivity layering condition of the area where the transformer substation grounding grid is located and the combination of the number, the drilling depth and the drilling angle of drilled holes.
And step three, selecting blasting articles with slightly smaller than the estimated blasting force to carry out manual blasting so as to ensure the safety of the surrounding environment and personnel.
Step four, detecting a soil gap structure and the whole size formed after blasting, if the detected soil gap is in a multi-branch tree root type structure, and the whole size meets the initial budget specification, namely the detection is qualified, pouring the liquid conductive phase change material from a pouring gate along a pore channel of the artificial drilling hole until the liquid conductive phase change material is fully distributed in the gap of the whole blasting area, so that the soil is in large-area contact with a grounding grid; if the detection is unqualified, repeating the steps from the first step to the third step until the detection is qualified.
And fifthly, after pouring is finished, directly putting the grounding rod or the grounding wire into the grounding grid from the pouring opening, and fixedly connecting the grounding rod or the grounding wire.
And step six, measuring the grounding resistance of the whole grounding grid, and carrying out measurement and acceptance work on the whole project.
The invention has the advantages of
(1) One or more embodiments of the invention can thoroughly improve the corrosivity problem of the existing grounding grid by utilizing the liquid-solid conversion mode of the phase-change material without welding or additional anti-corrosion treatment, and design different specifications according to different soil resistivity areas, so that the ground conditions are met, the conductivity of the soil high resistivity areas is effectively improved, and the fault current or the lightning current of the transformer substation is instantly dissipated through the grounding grid; meanwhile, the general corrosion problem of the existing transformer substation grounding system is perfectly solved, so that the service life of the transformer substation grounding system is prolonged;
(2) according to the soil hardness and the soil resistivity of the regions where the grounding systems of different transformer substations are located, the drilling depth, the drilling number, the number of the explosion points, the positions of the explosion points and the like of the soil are set, so that the grounding system of the transformer substation can instantly dissipate fault current or lightning current through a grounding grid no matter what resistivity soil environment is in; the method adopts a construction mode combining manual drilling and light blasting, can be applied to various regions with littering and complex geological conditions, avoids the process of manual excavation and backfilling, greatly improves the construction efficiency and the application range of the grounding system of the transformer substation, fully utilizes the effective space, does not occupy more areas, and enhances the applicability of the grounding system of the whole transformer substation;
(3) one or more embodiments of the invention can be fixedly connected with any specification and model of grounding rod or grounding wire, so that the fitting cost of the substation grounding system is reduced, and the substation grounding system has wide applicability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a cross-sectional view of one or more embodiments of the present invention;
FIG. 2 is a diagram of a borehole location in accordance with an embodiment of the present invention;
the method comprises the following steps of 1, the ground, 2, a pore passage drilled manually, 3, a blasting point, 4, a grounding grid, 5, a soil resistivity layering indicating line, 6, a grounding rod or a grounding wire, 7 and a pouring gate.
In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
the terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the invention is described in detail below with reference to fig. 1-2, and specifically, the structure is as follows:
the embodiment provides a novel substation grounding system, as shown in fig. 1, the substation grounding system includes a grounding grid, and a grounding rod or a grounding wire directly connected to the grounding grid; the grounding material of the grounding net is a solid-liquid phase-change material with good conductivity and corrosion resistance.
As a further implementation, the grounding grid adopts a tree root structure.
As a further implementation manner, the grounding rod or the grounding wire is fixedly connected with the grounding grid at the pouring gate.
Example two:
the embodiment provides a method for constructing a novel transformer substation grounding system, which comprises the following steps:
step one, determining the number of drilled holes, the depth of the drilled holes and the angle according to the soil hardness, the soil resistivity and the layering condition of the soil resistivity of the area where the transformer substation grounding grid is located.
And step two, determining the position of a blasting point and the specification and model of a blasting product according to the soil hardness, the soil resistivity and the soil resistivity layering condition of the area where the transformer substation grounding grid is located and the combination of the number, the drilling depth and the drilling angle of drilled holes.
And step three, selecting blasting articles with slightly smaller than the estimated blasting force to carry out manual blasting so as to ensure the safety of the surrounding environment and personnel.
Step four, detecting a soil gap structure and the whole size formed after blasting, if the detected soil gap is in a multi-branch tree root type structure, and the whole size meets the initial budget specification, namely the detection is qualified, pouring the liquid conductive phase change material from a pouring gate along a pore channel of the artificial drilling hole until the liquid conductive phase change material is fully distributed in the gap of the whole blasting area, so that the soil is in large-area contact with a grounding grid; if the detection is unqualified, repeating the steps from the first step to the third step until the detection is qualified.
And fifthly, after pouring is finished, directly putting the grounding rod or the grounding wire into the grounding grid from the pouring opening, and fixedly connecting the grounding rod or the grounding wire.
And step six, measuring the grounding resistance of the whole grounding grid, and carrying out measurement and acceptance work on the whole project.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A novel transformer substation grounding system is characterized by comprising a grounding grid and a grounding rod or a grounding wire directly connected with the grounding grid; the grounding material of the grounding net is a solid-liquid phase-change material with good conductivity and corrosion resistance.
2. The novel substation grounding system of claim 1, wherein the grounding grid is of a tree-root type structure.
3. The novel substation grounding system of claim 1, wherein the grounding rod or grounding wire is fixedly connected with the grounding grid at the pouring gate.
4. A construction method of a novel transformer substation grounding system is characterized by comprising the following steps:
step one, determining the number of drilled holes, the depth of the drilled holes and the angle according to the soil hardness, the soil resistivity and the layering condition of the soil resistivity of the area where the transformer substation grounding grid is located.
And step two, determining the position of a blasting point and the specification and model of a blasting product according to the soil hardness, the soil resistivity and the soil resistivity layering condition of the area where the transformer substation grounding grid is located and the combination of the number, the drilling depth and the drilling angle of drilled holes.
And step three, selecting blasting articles with slightly smaller than the estimated blasting force to carry out manual blasting so as to ensure the safety of the surrounding environment and personnel.
And step four, detecting the soil gap structure and the whole size formed after blasting, if the detected soil gap is in a multi-branch tree root type structure, and the whole size meets the initial budget specification, namely the detection is qualified, pouring the liquid conductive phase change material from the pouring gate along the pore channel of the artificial drilling hole until the gap of the whole blasting area is fully distributed, so that the soil and the grounding grid form large-area contact.
5. The method for constructing the novel substation grounding system according to claim 4, wherein if the detection is not qualified, the steps from the first step to the third step are repeated until the detection is qualified.
6. The construction method of the novel substation grounding system according to claim 4, further comprising a fifth step of directly placing the grounding rod or the grounding wire into the grounding grid from the pouring opening after pouring is completed, so that the grounding rod or the grounding wire is fixedly connected.
7. The construction method of the novel substation grounding system according to claim 4, further comprising a sixth step of measuring the grounding resistance of the whole grounding grid and performing measurement and acceptance work on the whole project.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239078.0A CN112582809A (en) | 2020-11-09 | 2020-11-09 | Novel transformer substation grounding system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011239078.0A CN112582809A (en) | 2020-11-09 | 2020-11-09 | Novel transformer substation grounding system |
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| CN112582809A true CN112582809A (en) | 2021-03-30 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237811A (en) * | 1999-07-09 | 1999-12-08 | 清华大学 | Method for reducing ground-resistance of transmission transformer station in area with high earth resistance |
| CN101752021A (en) * | 2010-02-11 | 2010-06-23 | 昆明宇恬科技工程有限公司 | Long-effective corrosion-prevention physical resistance-reducing agent |
| CN104409874A (en) * | 2014-11-18 | 2015-03-11 | 句容华源电器设备有限公司 | Transformer substation grounding grid resistance reduction method |
| CN105406078A (en) * | 2015-12-16 | 2016-03-16 | 上海航天电源技术有限责任公司 | Lithium ion battery containing high-thermal-conductivity and high-conductivity phase change composite material and conductive agent |
| CN106086534A (en) * | 2016-06-30 | 2016-11-09 | 国网山东省电力公司电力科学研究院 | A kind of aluminum carbon copper alloy earthing material of high-strength corrosion-resisting |
| CN106190038A (en) * | 2016-06-29 | 2016-12-07 | 同济大学 | A kind of preparation method of Graphene cross-linked network phase-change thermal storage/conducing composite material |
| CN107767984A (en) * | 2016-08-18 | 2018-03-06 | 北京海德思特科技有限公司 | Ionic earthing array filler |
-
2020
- 2020-11-09 CN CN202011239078.0A patent/CN112582809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237811A (en) * | 1999-07-09 | 1999-12-08 | 清华大学 | Method for reducing ground-resistance of transmission transformer station in area with high earth resistance |
| CN101752021A (en) * | 2010-02-11 | 2010-06-23 | 昆明宇恬科技工程有限公司 | Long-effective corrosion-prevention physical resistance-reducing agent |
| CN104409874A (en) * | 2014-11-18 | 2015-03-11 | 句容华源电器设备有限公司 | Transformer substation grounding grid resistance reduction method |
| CN105406078A (en) * | 2015-12-16 | 2016-03-16 | 上海航天电源技术有限责任公司 | Lithium ion battery containing high-thermal-conductivity and high-conductivity phase change composite material and conductive agent |
| CN106190038A (en) * | 2016-06-29 | 2016-12-07 | 同济大学 | A kind of preparation method of Graphene cross-linked network phase-change thermal storage/conducing composite material |
| CN106086534A (en) * | 2016-06-30 | 2016-11-09 | 国网山东省电力公司电力科学研究院 | A kind of aluminum carbon copper alloy earthing material of high-strength corrosion-resisting |
| CN107767984A (en) * | 2016-08-18 | 2018-03-06 | 北京海德思特科技有限公司 | Ionic earthing array filler |
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Application publication date: 20210330 |
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