CN109346929A - A kind of secondary total earth plate structure - Google Patents
A kind of secondary total earth plate structure Download PDFInfo
- Publication number
- CN109346929A CN109346929A CN201811416107.9A CN201811416107A CN109346929A CN 109346929 A CN109346929 A CN 109346929A CN 201811416107 A CN201811416107 A CN 201811416107A CN 109346929 A CN109346929 A CN 109346929A
- Authority
- CN
- China
- Prior art keywords
- earth plate
- total earth
- copper bar
- plate structure
- cable duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 33
- 239000010949 copper Substances 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 208000025274 Lightning injury Diseases 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
- H02B5/01—Earthing arrangements, e.g. earthing rods
Abstract
The present invention relates to a kind of secondary total earth plate structures comprising copper bar, twisted wire and total earth plate；In the cable duct below the screen cabinet of secondary device room, it is equipped with the copper bar by the direction of screen cabinet arrangement, and be also equipped with the copper bar in the cable duct of screen cabinet end, the adjacent copper bar joins end to end, and is formed and protects the indoor secondary grounded screen of equipotential；The secondary grounded screen side of equipotential is crimped to total earth plate by the twisted wire, and the reliable single-point for realizing secondary grounded screen to main grounding grid connects.The voltage born on secondary cable can be effectively reduced in the present invention, reduce the electric current flowed through in cable shield；Easy construction, and utilize the grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid.
Description
Technical field
The present invention relates to a kind of substation's technical fields, connect especially with regard to one kind in substation secondary earth mat to main earth mat
Connect secondary total earth plate structure of place's application.
Background technique
In substation, it is equipped with main grounding grid not only to provide for primary equipment with reference to ground, release various electric currents, guarantor
Personal safety is protected, there are also the secondary electrical grounding nets of special protection secondary device safe and reliable operation.The grounded screen is concentrated
The secondary devices such as master control room, switch yard, protective chamber concentration zones are arranged in, and close by cable duct inner copper line and main grounding grid
It is connected.
According to the great anti-accident measures of power grid, should adopt an effective measure the interference for preventing space magnetic field to secondary cable, and root
According to the actual conditions that switch yard and primary equipment are installed, laying and factory, the close-connected electrical grounding net of station owner's grounded screen.Deng
Current potential grounded screen should meet claimed below: 1) should master control room, the protection room laying channel of secondary cable, switch yard with regard to ground terminal
Sub- case and protection filter joint etc. are not less than 100mm using section2Naked copper row laying closely connect with main grounding grid
Electrical grounding net.2) master control room, protect Shi Ping cabinet lower layer cable duct in, by cabinet screen arrangement direction lay 100mm2
Dedicated copper bar, which is connected, is formed and protects indoor electrical grounding net.Protect indoor equipotential
Grounded screen and factory, the main grounding grid stood can only existence anduniquess tie point, tie point position preferably selects at cable shaft.To guarantee
Connection is reliable, and connecting line must be not less than 50mm at least 4 or more, section2Copper cable (row) constitute concurrent ground connection.
Although currently, strict regulations are made for the grounding point quantity of single electrical grounding net, not to " at least 4
It is more than root, section be not less than 50mm2Copper cable (row) constitute concurrent ground connection " practice propose concrete scheme, this be also design, construction
And the ambiguous place of acceptance specification.
Summary of the invention
In view of the above-mentioned problems, lightning stroke can be greatly reduced the object of the present invention is to provide a kind of secondary total earth plate structure
When the closer electrical secondary system of distance fault point on maximum potential difference, the synthesis resistivity for invading and harassing electrical secondary system to voltage increases
Add.And dangerous point can be reduced, the probability that shielded layer is burnt occurs.
To achieve the above object, the present invention takes following technical scheme: a kind of secondary total earth plate structure comprising copper
Row, twisted wire and total earth plate；In the cable duct below the screen cabinet of secondary device room, it is equipped with by the direction of screen cabinet arrangement described
Copper bar, and it is also equipped with the copper bar in the cable duct of screen cabinet end, the adjacent copper bar joins end to end, and forms protection room
The secondary grounded screen of interior equipotential；The secondary grounded screen side of equipotential is crimped to total earth plate by the twisted wire,
The reliable single-point for realizing secondary grounded screen to main grounding grid connects.
Further, total earth plate includes floor body, connector and grounding flat steel；The floor body is using U-shaped
Structure, and the both ends for being located at the U-shaped structure opening are respectively arranged with extension；The extension is solid by the connector
It is scheduled on cable duct bottom；Junction between the extension and the cable duct is additionally provided with the grounding flat steel, leads to
It crosses the grounding flat steel and draws the floor body and be connected to main grounding grid.
Further, the band steel protective cover identical with its shape and structure is provided with outside the floor body, and this is flat
Two extensions of steel protective cover are fixed on the cable duct bottom by the connector.
It further, is 100mm by the copper bar specification that the direction of screen cabinet arrangement is laid with2。
Further, the twisted wire uses 4 specifications for 50mm2Copper stranded conductor constitute.
Further, the floor body is made of the copper plate of about 0.8 meter of length, 40 × 4.
Further, the band steel protective cover uses length to be made of 0.8 meter of zinc-coated flat steel sheet.
Further, the connector uses the expansion bolt of M10 × 110.
Further, two extensions of the floor body are fixed on by the connector away from the 300mm of cable duct bottom.
The invention adopts the above technical scheme, which has the following advantages: 1, total earth plate of the invention is the equal of
The busbar connector of one secondary electrical grounding net.Total ground connection is added in the secondary electrical grounding net cable duct of protective chamber
Plate, maximum potential difference when lightning stroke can be greatly reduced in the closer electrical secondary system of distance fault point, invades electrical secondary system to voltage
The synthesis resistivity disturbed increases；Simultaneously when power frequency and lightning stroke occur, adding total fishplate bar can make electric current is more uniform to flow through
The cable shield of entire electrical secondary system reduces dangerous point and the probability that shielded layer is burnt occurs.2, the present invention is in small indoor setting U
The secondary total earth plate of type is not less than 50mm compared to using 4 or more, section2Copper cable lead to the mode of main grounding grid, be convenient for
Grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid, and construction is simple, in large-scale substation
Certain copper consumption can be also saved in the more engineering of protective chamber.
Detailed description of the invention
Fig. 1 is the secondary earth mat plan view in secondary device room；
Fig. 2 is secondary total earth plate structural schematic diagram；
Fig. 3 is the top view of Fig. 2.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term " on ", "lower" "inner", "outside"
Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is interpreted as limitation of the present invention.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of secondary total earth plate structure, which is used for master control room and protective chamber two
Secondary equipotential grounded screen is to main grounding grid junction comprising copper bar 1, twisted wire 2 and total earth plate 3.Positioned at secondary device room screen
In cable duct below cabinet, it is equipped with copper bar 1 by the direction of screen cabinet arrangement, and be also equipped with copper in the cable duct of screen cabinet end
Row 1, and adjacent copper bar 1 joins end to end, and is formed and protects indoor equipotential secondary grounded screen.The secondary grounded screen side of equipotential
It is crimped to total earth plate 3 by twisted wire 2, the reliable single-point for realizing secondary grounded screen to main grounding grid connects, and can be effectively reduced
The voltage born on secondary cable reduces the electric current flowed through in cable shield.
In a preferred embodiment, as shown in Figure 2 and Figure 3, total earth plate 3 includes floor body 4, connector 5 and connects
Ground band steel 6.Floor body 4 uses U-shaped structure, convenient for the crimping of twisted wire 2 and routine testing ground resistance；And it is opened positioned at U-shaped structure
Both ends at mouthful are respectively arranged with extension.The extension of floor body 4 is fixed on cable duct bottom by connector 5；It is located at
Junction between extension and cable duct is additionally provided with grounding flat steel 6, draws floor body 4 by grounding flat steel 6 and is connected to master
Grounded screen.
In above-described embodiment, band steel protective cover 7 identical with its shape and structure is provided with outside floor body 4, and
Two extensions of the band steel protective cover 7 are fixed on cable duct bottom also by connector 5.
It is 100mm by 1 specification of copper bar that the direction of screen cabinet arrangement is laid in the various embodiments described above2, i.e. copper core in copper bar 1
Cross-sectional area be 100mm2。
In the various embodiments described above, twisted wire 2 uses 4 specifications for 50mm2Copper stranded conductor constitute.
In the various embodiments described above, floor body 4 is made of the copper plate of about 0.8 meter of length, 40 × 4；Band steel protective cover 7
Length is used to be made of 0.8 meter of zinc-coated flat steel sheet.
In the various embodiments described above, connector 5 uses the expansion bolt of M10 × 110.
In the various embodiments described above, two extensions of floor body 4 are fixed on by connector 5 away from the 300mm of cable duct bottom.
To sum up, master control room, protective chamber are mounted on secondary grounded screen in substation, secondary grounded screen and main grounding grid
It connects significant safely to secondary device.The present invention adds total earth plate in secondary grounded screen, so that the two of each cell
Secondary equipotential grounded screen is that single-point is connect with grounded screen, can be effectively reduced the voltage born on secondary cable, reduces cable
The electric current flowed through in shielded layer.
The both ends of total earth plate are external to main grounding grid using grounding flat steel 6 and realize the reliable of secondary earth mat and main grounding grid
A little connect.Easy construction, and utilize the grounding point ground resistance of the secondary earth mat of operations staff's periodic detection to main grounding grid.
The various embodiments described above are merely to illustrate the present invention, and structure and size, setting position and the shape of each component are all can be with
It is varied, based on the technical solution of the present invention, the improvement and wait that all principles according to the present invention carry out individual part
With transformation, should not exclude except protection scope of the present invention.
Claims (9)
1. a kind of secondary total earth plate structure, it is characterised in that: including copper bar, twisted wire and total earth plate；Positioned at secondary device room
Shield in the cable duct below cabinet, is equipped with the copper bar by the direction of screen cabinet arrangement, and also spread in the cable duct of screen cabinet end
Equipped with the copper bar, the adjacent copper bar joins end to end, and is formed and protects the indoor secondary grounded screen of equipotential；The equipotential
Secondary grounded screen side is crimped to total earth plate by the twisted wire, realizes the reliable list of secondary grounded screen to main grounding grid
Point connection.
2. a kind of secondary total earth plate structure as described in claim 1, it is characterised in that: total earth plate includes floor sheet
Body, connector and grounding flat steel；The floor body uses U-shaped structure, and the both ends for being located at the U-shaped structure opening are distinguished
It is provided with extension；The extension is fixed on cable duct bottom by the connector；Positioned at the extension and the electricity
Junction between cable ditch is additionally provided with the grounding flat steel, draws the floor body by the grounding flat steel and is connected to main connect
Earth mat.
3. a kind of secondary total earth plate structure as claimed in claim 2, it is characterised in that: be provided with outside the floor body
The band steel protective cover identical with its shape and structure, and two extensions of the band steel protective cover are fixed on by the connector
The cable duct bottom.
4. the secondary total earth plate structure of one kind as described in any one of claims 1 to 3, it is characterised in that: press the screen cabinet cloth
The copper bar specification that the direction set is laid with is 100mm2。
5. the secondary total earth plate structure of one kind as described in any one of claims 1 to 3, it is characterised in that: the twisted wire uses 4
Root specification is 50mm2Copper stranded conductor constitute.
6. the secondary total earth plate structure of one kind as described in any one of claims 1 to 3, it is characterised in that: the floor body
It is made of the copper plate of about 0.8 meter of length, 40 × 4.
7. a kind of secondary total earth plate structure as claimed in claim 2 or claim 3, it is characterised in that: the band steel protective cover uses
Length is made of 0.8 meter of zinc-coated flat steel sheet.
8. the secondary total earth plate structure of one kind as described in any one of claims 1 to 3, it is characterised in that: the connector is adopted
With the expansion bolt of M10 × 110.
9. the secondary total earth plate structure of one kind as described in any one of claims 1 to 3, it is characterised in that: the floor body
Two extensions be fixed on by the connector away from the 300mm of cable duct bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416107.9A CN109346929A (en) | 2018-11-26 | 2018-11-26 | A kind of secondary total earth plate structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416107.9A CN109346929A (en) | 2018-11-26 | 2018-11-26 | A kind of secondary total earth plate structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109346929A true CN109346929A (en) | 2019-02-15 |
Family
ID=65317794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811416107.9A Pending CN109346929A (en) | 2018-11-26 | 2018-11-26 | A kind of secondary total earth plate structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109346929A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203521645U (en) * | 2013-10-08 | 2014-04-02 | 中国神华能源股份有限公司 | Earthing device of secondary electrical equipment and earthing system |
| CN203589374U (en) * | 2013-07-01 | 2014-05-07 | 中铝国际(天津)建设有限公司 | A TN-S system which is used for a steel structure workshop cable and which can be without a protective ground wire |
| CN203951074U (en) * | 2014-07-03 | 2014-11-19 | 福建永福工程顾问有限公司 | Novel secondary ground network laying structure |
| CN105429034A (en) * | 2015-12-08 | 2016-03-23 | 上海电力设计院有限公司 | Grounding device of transformer substation containing inlet and outlet cables and mounting method thereof |
| CN205857840U (en) * | 2016-08-12 | 2017-01-04 | 上海电力设计院有限公司 | The building structure of underground substation |
| CN108493634A (en) * | 2018-05-21 | 2018-09-04 | 中国电力科学研究院有限公司 | A kind of earthing or grounding means inhibiting electromagnetic disturbance |
| CN209169641U (en) * | 2018-11-26 | 2019-07-26 | 国家电网有限公司 | Secondary total earth plate structure |
-
2018
- 2018-11-26 CN CN201811416107.9A patent/CN109346929A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203589374U (en) * | 2013-07-01 | 2014-05-07 | 中铝国际(天津)建设有限公司 | A TN-S system which is used for a steel structure workshop cable and which can be without a protective ground wire |
| CN203521645U (en) * | 2013-10-08 | 2014-04-02 | 中国神华能源股份有限公司 | Earthing device of secondary electrical equipment and earthing system |
| CN203951074U (en) * | 2014-07-03 | 2014-11-19 | 福建永福工程顾问有限公司 | Novel secondary ground network laying structure |
| CN105429034A (en) * | 2015-12-08 | 2016-03-23 | 上海电力设计院有限公司 | Grounding device of transformer substation containing inlet and outlet cables and mounting method thereof |
| CN205857840U (en) * | 2016-08-12 | 2017-01-04 | 上海电力设计院有限公司 | The building structure of underground substation |
| CN108493634A (en) * | 2018-05-21 | 2018-09-04 | 中国电力科学研究院有限公司 | A kind of earthing or grounding means inhibiting electromagnetic disturbance |
| CN209169641U (en) * | 2018-11-26 | 2019-07-26 | 国家电网有限公司 | Secondary total earth plate structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |