CN208401074U - Nuclear power plant's grounding net of transformer substation - Google Patents
Nuclear power plant's grounding net of transformer substation Download PDFInfo
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- CN208401074U CN208401074U CN201821065888.7U CN201821065888U CN208401074U CN 208401074 U CN208401074 U CN 208401074U CN 201821065888 U CN201821065888 U CN 201821065888U CN 208401074 U CN208401074 U CN 208401074U
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- power plant
- nuclear power
- grounded screen
- transformer substation
- grounding net
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Abstract
The utility model discloses a kind of nuclear power plant's grounding net of transformer substation, comprising: the first grounded screen, in the soil below the substation's main part that is laid in, including more copper product earth conductors, the interlaced arrangement of more copper product earth conductors form grid reticular structure；And second grounded screen, it is laid in substation's peripheral region soil, including more Steel material earth conductors, the interlaced arrangement of more Steel material earth conductors forms grid reticular structure；Wherein, pass through at least two earth mat connecting line connections between the first grounded screen and the second grounded screen.Compared with prior art, the grounding net of transformer substation impedance of the utility model nuclear power plant is low, Corrosion Protection is good, low cost, structure are simple, easy for installation.
Description
Technical field
The utility model belongs to nuclear power plant's electric power grounding device technical field, and more specifically, the utility model relates to one
Kind nuclear power plant's grounding net of transformer substation.
Background technique
Nuclear power plant is typically chosen and is built on batholith due to security consideration, and since water consumption is big, mostly hill excavating and offshore filling and
It builds, therefore, the soil resistivity of plant area is higher.It requires to make each local ground net of nuclear power plant meet safety in production, usually adopts
Earthing pole is done with big section copper conductor, while the method for increasing the area of full factory's grounded screen as far as possible reaches reduction grounded screen
The purpose of impedance.But since nuclear power plant project inherently builds scheduling, the part substation in nuclear power plant needs to connect in Quan Chang
Earth mat is completed to build and put into operation before building up, and entire plant area, which only has Substation Design, at this time grounded screen, and to guarantee power transformation
The impedance for grounded screen of standing meets the requirement of safety in production, then needs to take many additional low-impedance measures of drop, these are additional
Drop resistance measure function value after the full factory's grounded screen of nuclear power plant is built up disappear, cause a large amount of manpower and financial resources to waste.
In addition, nuclear power plant grounding net of transformer substation is built long with subsequent full factory's ground mat construction interval time in advance at present, deposit
In the leading corrosion phenomenon of grounding net of transformer substation, entire nuclear power plant's grounded screen service life disunity problem is caused.
In view of this, it is necessory to provide, a kind of impedance is low, Corrosion Protection is good, low cost, structure are simple, easy for installation
Nuclear power plant's grounding net of transformer substation.
Utility model content
The purpose of this utility model is that: overcome the deficiencies of the prior art and provide a kind of impedance is low, Corrosion Protection is good,
Simple, the easy for installation nuclear power plant's grounding net of transformer substation of low cost, structure.
To achieve the goals above, the utility model provides a kind of nuclear power plant's grounding net of transformer substation, comprising:
First grounded screen, in the soil below the substation's main part that is laid in, including more copper product earth conductors, it is more
The interlaced arrangement of root copper product earth conductor forms grid reticular structure；And
Second grounded screen is laid in substation's peripheral region soil, including more Steel material earth conductors, more steel
The interlaced arrangement of material earth conductor forms grid reticular structure；
Wherein, pass through at least two earth mat connecting line connections between the first grounded screen and the second grounded screen.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, first grounded screen is square grid knot
Four edges of structure, square grid formation are circumferentially provided with the first mesh refinement portion.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, four side of square grid formation is also set up
There are the connector portions connecting with nuclear power plant main grounding grid.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, the square grid formation each edge is connect
Head is not less than 4, and the prominent ground of connector portions is arranged, and prominent ground is at least 0.5m.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, four apex angles of the square grid formation
It is provided with the first curved transition sections.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, the arc half of first curved transition sections
Diameter is not less than 5m.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, second grounded screen is square grid knot
Four edges of structure, square grid formation are circumferentially provided with the second mesh refinement portion.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, four apex angles of the square grid formation
It is provided with the second curved transition sections.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, the centre distance of second grounded screen
The center of one grounded screen is no more than 2km, and the resistivity of the soil of second grounded screen region is not more than 200 ohm meters.
As a kind of improvement of the utility model nuclear power plant grounding net of transformer substation, between adjacent two earth mat connecting lines
Laying spacing be not less than 10m.
Compared with the existing technology, the utility model nuclear power plant grounding net of transformer substation has following technical effect that
1) Corrosion Protection is good, late maintenance cost is low, and structure is simple, easy for installation；
2) nuclear power plant's grounding net of transformer substation has reached reduction substation and has connect by using the method for drawing Steel material grounded screen outside
The purpose of earth mat impedance has also achieved the purpose that reduce grounded screen cost, while also acting as under protection substation of the nuclear power plant piece of smooth land
The effect of copper product grounded screen, the promotional value with higher in nuclear power plant's grounded screen engineering.
Detailed description of the invention
With reference to the accompanying drawings and detailed description, to the utility model nuclear power plant grounding net of transformer substation and its Advantageous
Effect is described in detail, in which:
Fig. 1 is the structural schematic diagram of the utility model nuclear power plant grounding net of transformer substation.
Appended drawing reference:
The first grounded screen of 10-；The second grounded screen of 20-；30- earth mat connecting line；11- copper product earth conductor；The first net of 12-
Lattice encryption unit；The first curved transition sections of 13-；14- connector portions；21- Steel material earth conductor, the second mesh refinement of 22- portion；23-
Second curved transition sections.
Specific embodiment
In order to be more clear the purpose of this utility model, technical solution and advantageous effects, below in conjunction with attached drawing and
Specific embodiment, the present invention will be further described in detail.It should be understood that described in this specification specific
Embodiment is intended merely to explain the utility model, is not intended to limit the utility model.
Refering to Figure 1, the utility model nuclear power plant grounding net of transformer substation includes:
First grounded screen 10, in the soil below the substation's main part that is laid in, including more copper product earth conductors
11, the interlaced arrangement of more copper product earth conductors 11 forms grid reticular structure；And
Second grounded screen 20 is laid in substation's peripheral region soil, including more Steel material earth conductors 21, and more
The interlaced arrangement of Steel material earth conductor 21 forms grid reticular structure；
Wherein, it is connected between the first grounded screen 10 and the second grounded screen 20 by least two earth mat connecting lines 30.
In the shown embodiment, the first grounded screen 10 is copper product grounded screen, including more copper product earth conductors 11,
And be embedded under substation of the nuclear power plant piece of smooth land, underground is buried deep in not less than 0.8m, can be detoured or is embedded under basis when meeting basis.
Copper product earth conductor 11 is mainly copper stranded conductor, copper bar, copper rod etc., and preferred cross sectional area is 160~200mm2Copper stranded conductor,
In illustrated embodiment, copper product earth conductor 11 is that cross-sectional area is 185mm2Copper stranded conductor, more copper stranded conductors are interlaced
Arrangement forms square grid formula reticular structure, preferably rectangular lattice structure, and the spacing between adjacent copper stranded conductor is according to Practical Project
5m is chosen to 10m value range.
Preferably, the first mesh refinement portion 12, the first encryption unit are circumferentially provided at four edges of rectangular lattice structure
12 be specially along the edge of the first grounded screen 10 thereto heart distance 5m to 7m width annular region, preferably thereto the heart away from
Annular region from 5m width.First encryption unit 12 can reduce the contact electromotive force of the first grounded screen 10, guarantee the first ground connection
Net 10 it is safe and reliable.In 12 region of the first mesh refinement portion, adjacent 11 spacing of copper product earth conductor chooses 5m to 7m range
Value.
Preferably, four apex angles of rectangular lattice structure are provided with the first curved transition sections 13, the first curved transition sections 13
Arc radius be not less than 5m, generally 5m to 7m.
Further, the at a specified future date connector connecting with nuclear power plant main grounding grid is reserved at four edges of rectangular lattice structure
Portion 14, the reserved connector portions in the every side of rectangular lattice structure are not less than 4, and connector portions 14 can be prolonging for copper product earth conductor 11
Long part is also possible in addition be arranged, and the L-shaped structure of connector portions 14, horizontal part is connect with copper product earth conductor 11, vertical portion
Prominent ground is arranged not less than 0.5m, facilitates subsequent welding.
In the shown embodiment, the second grounded screen 20 is Steel material grounded screen, including more Steel material earth conductors 21,
It is embedded under the piece of smooth land, and the center of the first grounded screen of centre distance 10 of the second grounded screen 20 is no more than 2km, buries the second ground connection
The resistivity of the regional soil of net 20 is buried deep in underground not less than 0.8m to be advisable less than 200 ohm meters.Steel material earth conductor
21 can be steel band, round steel, angle steel, steel pipe, preferably (90~110) mm × (3~7) mm steel band, further preferably having a size of
The steel band of 100mm × 5mm, in the shown embodiment, the interlaced arrangement formation of the more steel bands having a size of 100mm × 5mm
Square grid formula reticular structure, preferably rectangular lattice structure, the setting spacing between adjacent steel band choose 5m according to Practical Project
To 10m value range.In the shown embodiment, the spacing between adjacent steel band is 7m.At four edges of rectangular lattice structure
Circumferentially be provided with the second mesh refinement portion 22, the second encryption unit 22 be specially along the edge of the second grounded screen 20 thereto the heart away from
From 5m to the annular region of 7m width, the second encryption unit 22 can reduce the contact electromotive force of the second grounded screen 20, guarantee ground connection
That nets is safe and reliable.In 22 region of the second mesh refinement portion, 21 spacing of adjacent steel band chooses 5m to 7m value range, preferably 5m.
Preferably, four apex angles of rectangular lattice structure are provided with the second curved transition sections 23, the second curved transition sections
23 arc radius is not less than 5m, generally 5m to 7m.
In the shown embodiment, it connects the first grounded screen 10 and the earth mat connecting line 30 of the second grounded screen 20 is led for copper
Body, both ends pass through welding respectively and are fixedly connected with the first grounded screen 10 and the second grounded screen 20, and earth mat connecting line 30 selects transversal
Face is 220~260mm2Copper stranded conductor, preferred cross sectional area 240mm2Copper stranded conductor, the quantity of earth mat connecting line 30 is not less than 2
Root, the laying spacing between every are not less than 10m, are embedded in 1m under the piece of smooth land.
In the shown embodiment, the second grounded screen 20 is also fixedly connected with earthing pole (not shown go out), earthing pole material
It is preferred that band steel, can be such that the first grounded screen 10 under substation of the nuclear power plant piece of smooth land is built with after in advance in nuclear power plant's grounding net of transformer substation
Xu Quan factory ground mat construction is completed in several years interval from corrosion impact.
Compared with the existing technology, the utility model nuclear power plant grounding net of transformer substation has following technical effect that
1) Corrosion Protection is good, late maintenance cost is low, and structure is simple, easy for installation；
2) nuclear power plant's grounding net of transformer substation has reached reduction substation and has connect by using the method for drawing Steel material grounded screen outside
The purpose of earth mat impedance has also achieved the purpose that reduce grounded screen cost, while also acting as under protection substation of the nuclear power plant piece of smooth land
The effect of copper product grounded screen, the promotional value with higher in nuclear power plant's grounded screen engineering.
According to above-mentioned principle, the utility model can also carry out change and modification appropriate to above-mentioned specific embodiment.
Therefore, the utility model is not limited to specific embodiment disclosed and described above, some modifications to the utility model
It should also be as falling into the protection scope of the claims of the present utility model with change.In addition, although having used one in this specification
A little specific terms, these terms are merely for convenience of description, does not constitute any restrictions to the utility model.
Claims (10)
1. a kind of nuclear power plant's grounding net of transformer substation characterized by comprising
First grounded screen, in the soil below the substation's main part that is laid in, including more copper product earth conductors, more copper
The interlaced arrangement of material earth conductor forms grid reticular structure；And
Second grounded screen is laid in substation's peripheral region soil, including more Steel material earth conductors, and more Steel materials connect
The interlaced arrangement of earthed conductor forms grid reticular structure；
Wherein, pass through at least two earth mat connecting line connections between the first grounded screen and the second grounded screen.
2. nuclear power plant's grounding net of transformer substation according to claim 1, which is characterized in that first grounded screen is rectangular grid
Four edges of lattice structure, square grid formation are circumferentially provided with the first mesh refinement portion.
3. nuclear power plant's grounding net of transformer substation according to claim 2, which is characterized in that four side of square grid formation is also
It is provided with the connector portions connecting with nuclear power plant main grounding grid.
4. nuclear power plant's grounding net of transformer substation according to claim 3, which is characterized in that the square grid formation each edge
Connector portions be not less than 4, the prominent ground setting of connector portions, and prominent ground is at least 0.5m.
5. nuclear power plant's grounding net of transformer substation according to claim 4, which is characterized in that four of the square grid formation
Apex angle is provided with the first curved transition sections.
6. nuclear power plant's grounding net of transformer substation according to claim 5, which is characterized in that the arc of first curved transition sections
Shape radius is not less than 5m.
7. nuclear power plant's grounding net of transformer substation according to claim 1, which is characterized in that second grounded screen is rectangular grid
Four edges of lattice structure, square grid formation are circumferentially provided with the second mesh refinement portion.
8. nuclear power plant's grounding net of transformer substation according to claim 7, which is characterized in that four of the square grid formation
Apex angle is provided with the second curved transition sections.
9. nuclear power plant's grounding net of transformer substation according to claim 1, which is characterized in that the center of second grounded screen away from
Center from the first grounded screen is no more than 2km, and the resistivity of the soil of second grounded screen region is not more than 200 ohm
Rice.
10. nuclear power plant's grounding net of transformer substation according to claim 1, which is characterized in that adjacent two earth mats connection
Laying spacing between line is not less than 10m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821065888.7U CN208401074U (en) | 2018-07-04 | 2018-07-04 | Nuclear power plant's grounding net of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821065888.7U CN208401074U (en) | 2018-07-04 | 2018-07-04 | Nuclear power plant's grounding net of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN208401074U true CN208401074U (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821065888.7U Active CN208401074U (en) | 2018-07-04 | 2018-07-04 | Nuclear power plant's grounding net of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825144A (en) * | 2022-04-06 | 2022-07-29 | 内蒙古能源规划设计研究院有限公司 | Arrangement structure of transformer substation grounding grid |
-
2018
- 2018-07-04 CN CN201821065888.7U patent/CN208401074U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825144A (en) * | 2022-04-06 | 2022-07-29 | 内蒙古能源规划设计研究院有限公司 | Arrangement structure of transformer substation grounding grid |
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