CN115441215A - Grounding grid system - Google Patents
Grounding grid system Download PDFInfo
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- CN115441215A CN115441215A CN202110624191.9A CN202110624191A CN115441215A CN 115441215 A CN115441215 A CN 115441215A CN 202110624191 A CN202110624191 A CN 202110624191A CN 115441215 A CN115441215 A CN 115441215A
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- grounding grid
- auxiliary
- control device
- current control
- grid
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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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- Prevention Of Electric Corrosion (AREA)
Abstract
The invention provides a grounding grid system, comprising: main grounding net, supplementary grounding net, current control device, auxiliary anode and reference electrode, current control device is used for providing the electric current, wherein: the anode port of the current control device is connected with the auxiliary anode, the cathode port of the current control device is connected with one side of the auxiliary grounding grid, the other side of the auxiliary grounding grid is connected with the main grounding grid, and the reference electrode port of the current control device is connected with the reference electrode; the main grounding grid, the auxiliary anode and the reference electrode are all positioned in an underground soil layer. According to the embodiment of the invention, the mode of providing electrons to the auxiliary grounding grid through the current control device is adopted, so that the metal of the auxiliary grounding grid is reduced to be in an ion state, and the corrosion to the auxiliary grounding grid is reduced.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a grounding grid system.
Background
In a nuclear power plant, a system ground, a lightning protection ground, a protection ground and an electronic ground share a ground net, and the ground net is an important facility for ensuring personal safety, equipment safety and system safety. The grounding grid of the present nuclear power plant is mainly composed of a deep-buried grounding grid, a shallow-buried grounding grid and a connecting conductor between the two grounding grids, wherein the grounding grid and the connecting conductor are 185mm in thickness 2 Bare copper cable of cross-section. In the prior art, although the grounding grid is made of bare copper cables and is not easy to corrode, the site of the nuclear power plant is located by the seaside, so that the saline-alkali degree of soil is high, and the risk of corrosion exists for a long time. And the seaside area resistivity is higher, and in order to reduce ground resistance, the deep-buried grounding net is buried in the groove filled with resistance reducing agent material under the raft foundation, so that the whole cost is higher, and the construction and maintenance are difficult. Because the deep-buried grounding grid is buried under the raft foundation for a long time, the risk of the failure of the resistance reducing agent exists, so that the grounding resistance of the grounding grid is increased and exceeds the design value, and the original function is lost. For example, if a ground fault occurs, the ground potential may rise above a limit value, thereby endangering the safety of equipment and personnel.
It can be seen that there is a problem in the related art that the landing potential may rise beyond the limit.
Disclosure of Invention
The embodiment of the invention provides a grounding grid system, which aims to solve the problem that the ground potential possibly rises and exceeds the limit in the prior art.
To achieve the above object, an embodiment of the present invention provides a ground grid system, including: main grounding net, supplementary grounding net, current control device, auxiliary anode and reference electrode, current control device is used for providing the electric current, wherein:
the anode port of the current control device is connected with the auxiliary anode, the cathode port of the current control device is connected with one side of the auxiliary grounding grid, the other side of the auxiliary grounding grid is connected with the main grounding grid, and the reference electrode port of the current control device is connected with the reference electrode;
the main grounding grid, the auxiliary anode and the reference electrode are all positioned in an underground soil layer.
Optionally, the main grounding grid and the auxiliary grounding grid are located in a fixed range of the depth of the soil.
Optionally, the main grounding grid is of an annular quadrilateral structure, and corners of the main grounding grid are arc-shaped.
Optionally, the center of the main grounding grid and the center of the auxiliary grounding grid are smaller than or equal to a fixed distance.
Optionally, the auxiliary grounding grid comprises a first conductor bar set and a second conductor bar set, the first conductor bar set and the second conductor bar set comprising a fixed number of parallel conductor bars;
the first conductor bar group and the second conductor bar group are connected in a staggered manner;
the main grounding grid is connected with the first conductor rod group, and the negative electrode port of the current control device is connected with the second conductor rod group.
Optionally, the main grounding grid is made of a copper material, and the auxiliary grounding grid is made of a steel material.
Optionally, the reference electrode is less than or equal to a fixed distance from the auxiliary grounding grid.
Optionally, the device further comprises a control computer, and the current control device is connected with the control computer.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, the current control device provides electrons to the auxiliary grounding grid, so that the metal of the auxiliary grounding grid is reduced to be in an ion state, and the effect of reducing the corrosion of the auxiliary grounding grid is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a ground grid system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a ground grid system, which is characterized by including: a main earth grid 10, an auxiliary earth grid 14, a current control device 11, an auxiliary anode 12 and a reference electrode 13, the current control device 11 being configured to provide a current, wherein:
the anode port of the current control device 11 is connected with the auxiliary anode 12, the cathode port of the current control device 11 is connected with one side of the auxiliary grounding grid 14, the other side of the auxiliary grounding grid 14 is connected with the main grounding grid 10, and the reference electrode 13 port of the current control device 11 is connected with the reference electrode 13;
the main grounding grid 10, the auxiliary grounding grid 14, the auxiliary anode 12 and the reference electrode 13 are all located in the underground soil layer.
In this embodiment, the auxiliary ground net 14 is connected to the negative electrode port of the current control device 11 to protect the metal material of the auxiliary ground net 14 from corrosion, thereby prolonging the service life of the entire ground net.
The auxiliary grounding grid 14, the current control device 11 and the auxiliary anode 12 form a current loop through the soil, electrons flow out from a negative electrode port of the current control device 11, enter the soil after passing through the auxiliary grounding grid 14, and then reach the position of the auxiliary anode 12, so that the electrons can be supplemented to the auxiliary grounding grid 14 in time, and the metal of the auxiliary grounding grid 14 is prevented from being corroded due to ion change.
In addition, the auxiliary grounding grid 14 is directly added outside the main grounding grid 10, so that the grounding resistance of the whole grounding grid system can be effectively reduced.
Wherein, the electrode potential of the auxiliary grounding grid 14 is lower than that of the main grounding grid 10, and the auxiliary grounding grid 14 is connected with the main grounding grid 10 to cause corrosion on the surface of the auxiliary grounding grid 14, thereby achieving the effect of protecting the main grounding grid 10.
The auxiliary grounding grid 14 is connected with the current control device 11, so that the corrosion of the auxiliary grounding grid 14 can be reduced, the resistance of the auxiliary grounding grid 14 can be maintained within an application range, and the service life of the whole grounding grid system can be prolonged.
The auxiliary ground grid 14 and the main ground grid 10 are usually connected by at least two steel ground bodies, so that the main ground grid and the auxiliary ground grid are not separated when the connecting conductor is broken at any point. Usually, the distance between two steel grounding bodies is not less than 10 m.
The auxiliary anode 12 may be made of a metal oxide titanium material or other alternative metal materials, and the reference electrode 13 may be made of a silver chloride electrode or a calomel electrode.
In addition, the current control device 11 has a constant potential control function, and can maintain the ground grid connected to the negative electrode port in a relatively stable potential condition.
Optionally, the main grounding grid 10 and the auxiliary grounding grid 14 are located at a fixed depth of the soil.
In this embodiment, the embedding depth of the main ground grid 10 and the auxiliary ground grid 14 is controlled to be shallow, so that the cost can be saved and the operation by an installer is facilitated.
The embedding depth of the main grounding grid 10 and the auxiliary grounding grid 14 is 0.8-1.0 meter, and compared with the prior art that the grounding grid needs to be arranged in a trench below a building for the building with the depth of less than 5 meters, the installation operation of operators can be facilitated.
In addition, in the prior art, the deep-buried grounding grid needs to be buried in the trenches of 5 meters or less, and the resistance of the grounding grid needs to be reduced by using a physical resistance reducer. The auxiliary grounding grid 14 is connected with the main grounding grid 10, so that the requirement of the system resistance of the grounding grid can be met under the condition that the buried position of the grounding grid system is shallow, and the use and maintenance cost of the grounding grid system is reduced.
Optionally, the main grounding grid 10 is of an annular quadrilateral structure, and corners of the main grounding grid 10 are arc-shaped.
In the present embodiment, the corners of the main ground net 10 are rounded, so that the mechanical strength of the main ground net 10 can be ensured and the voltage equalization is facilitated.
The current main grounding grid 10 is buried to a depth of 0.8-1.0 m, and needs to be away from the wall or foundation of the nuclear power plant by 1 m, the main grounding grid 10 is designed to be of an annular quadrilateral structure to meet the requirement of the nuclear power plant, and the turning part is designed to be of an arc shape to avoid mechanical damage at the corner as far as possible.
Optionally, the center of the main grounding grid 10 and the center of the auxiliary grounding grid 14 are less than or equal to a fixed distance.
In the present embodiment, the resistance is reduced by reducing the distance between the auxiliary ground grid 14 and the main ground grid 10 as much as possible, so as to satisfy the resistance requirement of the ground grid system. Typically the center of the main earth grid 10 and the center of the auxiliary earth grid 14 are no more than 1.5 km apart.
Wherein the total resistance after the main grounding grid 10 and the auxiliary grounding grid 14 are connected cannot be larger than 1 ohm so as to meet the requirement of the grounding grid system.
Optionally, the auxiliary grounding grid 14 comprises a first conductor bar group 141 and a second conductor bar group 142, the first conductor bar group 141 and the second conductor bar group 142 comprising a fixed number of parallel conductor bars;
the first conductor bar group 141 and the second conductor bar group 142 are connected alternately;
the main earth grid 10 is connected to the first conductor bar group 141, and the negative terminal of the current control device 11 is connected to the second conductor bar group 142.
In the present embodiment, the first conductor bar group 141 and the second conductor bar group 142 are connected in an alternating manner, so that the resistance of the auxiliary ground grid 14 can be reduced and controlled within a predetermined range, and the resistance requirement of the ground grid system can be satisfied.
However, since the resistance of the entire ground net system needs to be reduced, the resistance of the auxiliary ground net 14 can be reduced to the maximum extent by providing two conductor bar groups in which the auxiliary ground net 14 is connected in a staggered manner. In addition, other connection methods may be used as well that can reduce the resistance of the auxiliary ground grid 14.
Optionally, the main grounding grid 10 is made of a copper material, and the auxiliary grounding grid 14 is made of a steel material.
In this embodiment, the main ground net 10 is made of a copper material, and the auxiliary ground net 14 is made of a steel material, so that the cost of the entire ground net system is reduced.
Wherein, the electrode potential of the steel is lower than that of the copper, and the protection effect on the material with higher electrode potential can be realized by connecting the steel and the copper. The corrosion which possibly occurs under actual conditions can occur on the surface of steel instead of copper, and the connection mode of the auxiliary grounding grid 14 can reduce the influence of the corrosion on the resistance to the greatest extent, so that the overall corrosion resistance of the grounding grid system is improved.
Optionally, the reference electrode 13 is less than or equal to a fixed distance from the auxiliary grounding grid 14.
In this embodiment, the potential of the reference electrode 13 is to avoid the influence of the environment as much as possible, and the potential is as close as possible to the auxiliary ground grid 14, so that the resistance of the auxiliary ground grid 14 can be more clearly reflected, and the judgment by the maintenance personnel is facilitated.
Optionally, the grounding grid system further includes a control computer 15, and the current control device 11 is connected to the control computer 15.
In the embodiment, the whole grounding grid system can be remotely controlled by controlling the calculator, so that the manpower is reduced, and the using effect of the grounding grid is improved.
The current control device 11 is provided with a signal acquisition module, and can collect potential data and relevant parameters of the auxiliary grounding grid 14 and send the potential data and the relevant parameters to the control computer 15. The maintenance personnel can monitor the use of the grounded network system by means of the control computer 15 and make the most sensible treatment.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A grounded screen system, comprising: main grounding net, supplementary grounding net, current control device, auxiliary anode and reference electrode, current control device is used for providing the electric current, wherein:
the anode port of the current control device is connected with the auxiliary anode, the cathode port of the current control device is connected with one side of the auxiliary grounding grid, the other side of the auxiliary grounding grid is connected with the main grounding grid, and the reference electrode port of the current control device is connected with the reference electrode;
the main grounding grid, the auxiliary anode and the reference electrode are all positioned in an underground soil layer.
2. The grounding grid system of claim 1, wherein the main grounding grid and the auxiliary grounding grid are located within a fixed range of depths of the soil.
3. The grounding grid system of claim 1, wherein the main grounding grid is of an annular quadrilateral configuration, and corners of the main grounding grid are rounded.
4. The grounding grid system of claim 1, wherein a center of the main grounding grid and a center of the auxiliary grounding grid are less than or equal to a fixed distance.
5. The grounding grid system of claim 1, wherein the auxiliary grounding grid comprises a first conductor bar set and a second conductor bar set, the first conductor bar set and the second conductor bar set comprising a fixed number of parallel conductor bars;
the first conductor bar group and the second conductor bar group are connected in an interleaved manner;
the main grounding grid is connected with the first conductor rod group, and the negative electrode port of the current control device is connected with the second conductor rod group.
6. The grounding grid system of claim 1, wherein the material of the primary grounding grid is a copper material and the material of the secondary grounding grid is a steel material.
7. The grounding grid system of claim 1, wherein the reference electrode is a fixed distance less than or equal to the auxiliary grounding grid.
8. The grounding grid system as in claim 7, further comprising a control computer, the current control device being connected to the control computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624191.9A CN115441215A (en) | 2021-06-04 | 2021-06-04 | Grounding grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624191.9A CN115441215A (en) | 2021-06-04 | 2021-06-04 | Grounding grid system |
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| Publication Number | Publication Date |
|---|---|
| CN115441215A true CN115441215A (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110624191.9A Pending CN115441215A (en) | 2021-06-04 | 2021-06-04 | Grounding grid system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117096629A (en) * | 2023-08-25 | 2023-11-21 | 江苏安全技术职业学院 | Electric power safety earthing device |
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2021
- 2021-06-04 CN CN202110624191.9A patent/CN115441215A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117096629A (en) * | 2023-08-25 | 2023-11-21 | 江苏安全技术职业学院 | Electric power safety earthing device |
| CN117096629B (en) * | 2023-08-25 | 2024-04-19 | 江苏安全技术职业学院 | Electric power safety earthing device |
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