CN205539166U - Reserve ground net and bury point discharge device - Google Patents
Reserve ground net and bury point discharge device Download PDFInfo
- Publication number
- CN205539166U CN205539166U CN201520866112.5U CN201520866112U CN205539166U CN 205539166 U CN205539166 U CN 205539166U CN 201520866112 U CN201520866112 U CN 201520866112U CN 205539166 U CN205539166 U CN 205539166U
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- insulation
- band
- discharge device
- ground net
- earth mat
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Abstract
Reserve ground net and bury point discharge device, bury the point discharge device and include: shell, first insulation connecting band, second insulating connecting band, counter and locate the current transformer on the insulating connecting band of second, the first insulation connecting band links to each other with current earth mat, the insulating connecting band of second links to each other with reserve ground net, when the voltage of current earth mat buried discharge device's gap discharge design value with reaching, current earth mat buried discharge device through ground and discharges to reserve ground net. The utility model provides a reserve ground net and bury point discharge device, through newly -built reserve ground net around the present horizontal earth mat that needs protection, the land used buries discharge device and will have the earth mat now and be connected with reserve ground net again, when the voltage of present earth mat surpass that rules require worth safely the time, can bury discharge device through ground and discharge to reserve ground net to reduce the voltage of current earth mat, make its control in the safety value, and then reach the effect of the current earth mat of protection.
Description
Technical field
This utility model relates to electric power grounding grid, wind-driven generator grounded screen, transmission line tower grounding network, high-rise buildings grounding technology field, particularly relates to a kind of service ground net and buried point discharge device.
Background technology
Owing to net capacity increases, Power System Shortcuts electric current strengthens, and voltage is increased to 1000KV by 110KV, 220KV, 330KV, 500KV, and transformer station's short circuit current increases, and the requirement to power plant, grounding net of transformer substation is higher.When electrical equipment building is higher regional of soil resistivity, reduce earth resistance costly to meet regulatory requirements.When soil resistivity is more than 5000 Europe rice, which kind of no matter takes drop resistance measure, is all difficult to meet national standard requirement, therefore, other measure will be used to ensure personal safety when power equipment safety and operation maintenance.Under normal circumstances, when grounded screen produces high voltage threat equipment and personal safety, the protection of power system uses earth resistance or the mode of equalizing voltage of reducing, and such as uses high resistant ground, but high resistant ground is invested huge, and operation and maintenance cost is huge.The Cement Concrete high resistant ground rainy day can reduce；Rubble resistive formation accumulates due to dust, to be periodically carried out after operation；Colophonium resistive formation easily cracks, high resistant ground handling safeguard make us worried.
Power system, device or equipment should be by regulation ground connection, and grounded screen is a kind of mode of electric equipment protection.According to GB50065-2011 " the grounding design specification of alternating-current electric device ", combined type grounded screen:
S=(0.5ρ/R)2
Wherein, S is the grounded screen gross area (m covered on ρ soil resistivity2), R is earth resistance (Ω).As R=0.5 Ω, ρ=1000 Europe rice, S=1000m × 1000m；As R=1 Ω, ρ=1000 Europe rice, S=500m × 500m.As can be seen here, build the cost of the grounded screen of earth resistance 0.5 Ω, be equivalent to build the grounded screen of four grounded resistance 1 Ω, invest huge.Therefore, cost of how reducing investment outlay while protection power system, become difficult point and the emphasis of research.
Summary of the invention
For the problems referred to above, this utility model provides a kind of service ground net and buried point discharge device, by near the protected existing earth mat of needs, and newly-built service ground net, the overvoltage discharge prevention of existing earth mat is realized by buried point discharge device.
For realizing above-mentioned purpose of the present utility model, this utility model provides a kind of buried point discharge device, including: shell, the first insulation connect band, the second insulation connects band, enumerator and are located at the second insulation connects the current transformer on band；Described shell includes the right baffle-plate being provided with corresponding through hole and right baffle plate；One end that described first insulation connects band is positioned at outside right baffle-plate, and the other end, through the through hole of right baffle-plate, is fixed on inside device by the first collets；One end that described second insulation connects band is positioned at outside right baffle plate, and the other end, through the through hole of right baffle plate, is fixed on inside device by the second collets；Described first insulation connection band is connected band with the second insulation and is internally formed gap discharge at device；Described enumerator is located at inside device, and described current transformer and the second insulation connection band, enumerator are electrical connected.
Described through hole is positioned at the center of left and right baffle plate.
It is arc that described first insulation connect band be connected band to be positioned at the discharge end within device with the second insulation.
Described buried point discharge device is obturator, internal full noble gas；Described first insulation connects the through hole insulation airtight connection of band and right baffle-plate, and the second insulation connects the through hole insulation airtight connection of band and right baffle plate.
Described first insulation connects band and is connected the band electric conductor additional insulation protective jacket composition by diameter 10～30mm with the second insulation；Described first insulation connects band and insulate with second and be connected the part that band is placed within device and be not provided with insulation protective jacket.
Described shell can be made up of metal, PVC, plastic or other material.
Described enumerator is used for record current gap discharge number of times and size of current, by GPRS, data is uploaded to outside main system.
This utility model also provides for a kind of service ground net, applies described buried point discharge device, and the first insulation of described buried point discharge device connects band and is connected with existing earth mat, and described second insulation connects band and is connected with service ground net；When the voltage of described existing earth mat reaches the gap discharge design load of buried point discharge device, existing earth mat is discharged to service ground net by buried point discharge device.
The gap discharge design load of described buried point discharge device is 2000V, 3000V, 5000V or any discharge voltage.
Described service ground net can be one or more；Described service ground net can be formed by connecting by some ground connection deep-wells, it is also possible to is formed by connecting by some horizontal earth mats, it is also possible to is formed by connecting by some ground connection hole, it is also possible to be formed by connecting by some ion grounding electrodes；Described ground connection deep-well is at least 1, and described horizontal earth mat is at least 1；The plurality of service ground net may be located at existing earth mat the same side, it is also possible to is positioned at the not homonymy of existing earth mat.
Described service ground net is connected according to multiple ground connection deep-wells, may be arranged at around existing earth mat；According to the standby earth mat of level, several meters or tens of rice should be left as far as possible with existing earth mat.
Compared with prior art the beneficial effects of the utility model.
The service ground net of this utility model offer and buried point discharge device; by newly-built service ground net around existing need horizontal earth mat to be protected; with buried point discharge device, existing earth mat is connected with service ground net again; when the voltage of existing earth mat exceedes the safety value of regulatory requirements; can be discharged to service ground net by buried point discharge device; to reduce the voltage of existing earth mat so that it is control in safety value, and then reach to protect the effect of existing earth mat.
Accompanying drawing explanation
Fig. 1 is the normal cross-section structural representation of this utility model buried point discharge device.
Fig. 2 is the perspective view of this utility model buried point discharge device.
Fig. 3 is the structural representation that the present embodiment 1 applies the service ground net of buried point discharge device.
Fig. 4 is the structural representation of the present embodiment 1 ground connection deep-well.
Detailed description of the invention
This utility model is further described below in conjunction with specific embodiment.
Refer to Fig. 1,2, the present embodiment provides a kind of buried point discharge device, and insulating including: shell 1, first connects band 2, second and insulate to connect band 3, enumerator and be installed on the second insulation and connect with the current transformer 5 on 3；Described shell 1 includes being provided with the right baffle-plate 8 of corresponding through hole 6,7 and right baffle plate 9；One end that described first insulation connects with 2 is positioned at outside right baffle-plate 8, and the other end, through the through hole 6 of right baffle-plate 8, is fixed on inside device by the first collets 10；One end that described second insulation connects with 3 is positioned at outside right baffle plate 9, and the other end, through the through hole 7 of right baffle plate 9, is fixed on inside device by the second collets 11；Described first insulation connection band 2 is connected band 3 with the second insulation and is internally formed gap discharge at device；Described enumerator is located at inside device, and described current transformer 5 is connected band 3 with the second insulation, enumerator is electrical connected.
Described shell 1 is cylindrical, and a length of 255mm, thickness is 10mm；Described right baffle-plate 8 is 140mm with the length of right baffle plate 9, and thickness is 30mm；Described right baffle-plate 8 can be threadeded with shell 1 with right baffle plate 9；A diameter of 20mm of described through hole (6,7)；Described first insulation connection is positioned at a length of 60mm within device with 2, and described second insulation connection is positioned at a length of 125mm within device with 3；Described first insulation connects and is connected the discharging gap with 3 with 2 with the second insulation is 10mm.
Described through hole 6,7 is positioned at the center of right baffle-plate 8 and right baffle plate 9；Described shell 1 is made of plastics.
Described first insulation connects band 2 and insulate to be connected with second and be positioned at the discharge end within device with 3 and be arc, and the radius of arc is 50mm.When not insulating, electric power transmission can be carried out by soil between existing earth mat and service ground net, then the potential difference between existing earth mat and service ground net will be the least, and service ground net does not just have the effect protecting existing earth mat.Therefore, this utility model uses insulation connection band to carry out the connection between existing earth mat and service ground net, effectively prevent both and carried out the situation of electric power transmission by soil, when making the earth potential of existing earth mat raise, service ground net can be discharged effectively.
Described buried point discharge device is obturator, internal full noble gas；Described first insulation connects through hole 6 with 2 Yu right baffle-plate 8 and insulate airtight connection, and second connection through hole 7 with 3 Yu right baffle plate 9 that insulate insulate airtight connection.
Described first insulation connection band 2 is connected band 3 diameters with the second insulation and is 20mm, is formed by reinforcing bar or the additional insulation protective jacket of zinc-plated rod iron 12 13；Described first insulation connects band 2 and insulate to be connected with second and be placed in the part within device with 3 and be not provided with insulation protective jacket 13.
Described enumerator is used for record current gap discharge number of times and size of current, by GPRS, data is uploaded to outside main system.Described enumerator can be powered by the battery installed；Described current transformer 5 can be powered by the battery installed, it is possible to for rechargeable battery, by storing the electric energy that gap discharge produces, powers for current transformer 5.
Referring to Fig. 3, the present embodiment also provides for a kind of service ground net applying buried point discharge device, and the first insulation of described buried point discharge device 16 connects band 2 and is connected with existing earth mat 14, and described second insulation connects band 3 and is connected with service ground net 15；When the voltage of described existing earth mat 14 reaches the gap discharge design load of buried point discharge device 16, existing earth mat 14 is discharged to service ground net 15 by buried point discharge device 16.
The gap discharge design load of described buried point discharge device 16 is 2000V, the magnitude of voltage of the most existing earth mat 14 is more than 2000V, will be discharged to service ground net 15 by buried point discharge device 16, to reduce the voltage of existing earth mat 14, existing earth mat 14 is made to remain in the safety value of regulatory requirements.
If existing earth mat 14 is 50m × 50m, then the distance between newly-built service ground net 15 and existing earth mat 14 can be 30m.
The material of described existing earth mat 14 can be copper 40mm(width) × 4mm(is thick), steel (outside is zinc-plated) 68mm(width) × 6mm(is thick).
For verifying the beneficial effects of the utility model further, it is provided that tests below case.
Test example 1: be applied to 500KV transformer station.
Referring to Fig. 3, existing earth mat is 150m × 150m, installs 10 mouthfuls of ground connection deep-wells, described ground connection deep-well diameter 100mm, deep 30m outside the enclosure wall of existing earth mat；Spacing between described deep-well is 20m.By 60mm(width between described 10 mouthfuls of deep-wells) × 6mm(is thick) zinc-coated flat steel sheet be connected with each other (welding), form a complete service ground net.Then by three buried point discharge devices, existing earth mat is connected with service ground net.Described three buried point discharge devices are distributed between 10 mouthfuls of ground connection deep-wells.The benefit using vertical ground connection deep-well is: vertical ground connection deep-well is the least with existing level earth mat electric coupling.
Referring to Fig. 4, described ground connection deep-well is: drill straight hole 17 on rock geology, expands boring, forms some cavitys 18, put into grout pipe 19 until bottom in straight hole 17 on described straight hole 17；Described cavity 18 region corresponding with grout pipe 19 is provided with explosion-proof sleeve pipe 20, and explosion-proof sleeve pipe 20 is fixed on the outer wall bottom grout pipe 19 by baffle plate 21；Described grout pipe 19 top is provided with external screw thread, and bottom is provided with the grout hole of random distribution；Described explosion-proof sleeve pipe 20 is distributed the collar aperture 22 corresponding with grout hole.Explosive or static(al) explosion extender 23 in cavity 18.Make straight hole 17 surrounding produce rock fracture after cavity 18 explosion, seal petrosal foramen, with forcing press by resistance-lowering material, in press-in straight hole 17, cavity 18 and rock fracture.Described cavity 18 at least 1.
Test example 2: be applied to wind-driven generator.
Existing earth mat is 50m × 40m, installs 3 mouthfuls of ground connection deep-wells, described ground connection deep-well diameter 100mm, deep 30m outside the enclosure wall of existing earth mat；By 60mm(width between described 3 mouthfuls of deep-wells) × 6mm(is thick) zinc-coated flat steel sheet be connected with each other (welding), form a complete service ground net.Then by two buried point discharge devices, existing earth mat is connected with service ground net.
Test example 3: be applied to power transmission sequence.
At the former earth lead of steel tower, bore two mouthfuls of ground connection deep-wells, described ground connection deep-well diameter 100mm, deep 20m；By 60mm(width between described two mouthfuls of deep-wells) × 6mm(is thick) zinc-coated flat steel sheet be connected with each other (welding), form a complete service ground net.Then by two buried point discharge devices, existing earth mat is connected with service ground net.
Claims (10)
- The most buried point discharge device, it is characterised in that including: shell (1), the first insulation connect band (2), the second insulation connects band (3), enumerator and are located at the second insulation connects the current transformer (5) on band (3)；Described shell (1) includes the right baffle-plate (8) being provided with corresponding through hole (6,7) and right baffle plate (9)；One end that described first insulation connects band (2) is positioned at right baffle-plate (8) outside, and the other end, through the through hole (6) of right baffle-plate (8), is fixed on inside device by the first collets (10)；One end that described second insulation connects band (3) is positioned at right baffle plate (9) outside, and the other end, through the through hole (7) of right baffle plate (9), is fixed on inside device by the second collets (11)；Described first insulation connection band (2) is connected band (3) with the second insulation and is internally formed gap discharge at device；Described enumerator is located at inside device, and described current transformer (5) is connected band (3) with the second insulation, enumerator is electrical connected.
- Buried point discharge device the most as claimed in claim 1, it is characterised in that described through hole (6,7) is positioned at the center of left and right baffle plate (8,9).
- Buried point discharge device the most as claimed in claim 1, it is characterised in that described first insulation connects band (2) and insulate with second and be connected the discharge end that band (3) is positioned within device and be arc.
- Buried point discharge device the most as claimed in claim 1, it is characterised in that described buried point discharge device is obturator, internal full noble gas；Described first insulation connects through hole (6) the insulation airtight connection of band (2) and right baffle-plate (8), and the second insulation connects through hole (7) the insulation airtight connection of band (3) and right baffle plate (9).
- Buried point discharge device the most as claimed in claim 1, it is characterised in that described first insulation connects band (2) and is connected the band (3) electric conductor (12) additional insulation protective jacket (13) composition by diameter 10～30mm with the second insulation；Described first insulation connects band (2) and insulate with second and be connected band (3) and be placed in the part within device and be not provided with insulation protective jacket (13).
- 6. service ground net, buried point discharge device described in described service ground net application claim 1, it is characterized in that, first insulation of described buried point discharge device (16) connects band (2) and is connected with existing earth mat (14), and described second insulation connects band (3) and is connected with service ground net (15)；When the voltage of described existing earth mat (14) reaches the gap discharge design load of buried point discharge device (16), existing earth mat (14) is discharged to service ground net (15) by buried point discharge device (16).
- 7. service ground net as claimed in claim 6, it is characterised in that the gap discharge design load of described buried point discharge device (16) is 2000V.
- 8. service ground net as claimed in claim 6, it is characterised in that described service ground net (15) can be one or more；Described service ground net (15) is formed by connecting by some ground connection deep-wells, or is formed by connecting by some horizontal earth mats, or is formed by connecting by some ground connection hole, or is formed by connecting by some ion grounding electrodes；Described ground connection deep-well is at least 1, and described horizontal earth mat is at least 1；The plurality of service ground net (15) is positioned at existing earth mat (14) the same side, or is positioned at the not homonymy of existing earth mat (14).
- 9. service ground net as claimed in claim 6, it is characterised in that described service ground net (15) uses multiple ground connection deep-well to be connected, is arranged in existing earth mat (14) around.
- 10. service ground net as claimed in claim 6, it is characterised in that described service ground net (15) uses the standby earth mat of level, should leave several meters or tens of rice with existing earth mat (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520866112.5U CN205539166U (en) | 2015-11-03 | 2015-11-03 | Reserve ground net and bury point discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520866112.5U CN205539166U (en) | 2015-11-03 | 2015-11-03 | Reserve ground net and bury point discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539166U true CN205539166U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520866112.5U Withdrawn - After Issue CN205539166U (en) | 2015-11-03 | 2015-11-03 | Reserve ground net and bury point discharge device |
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| CN (1) | CN205539166U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322442A (en) * | 2015-11-03 | 2016-02-10 | 海南中海电力工程有限公司 | Underground discharging apparatus and standby earth screen applying same |
-
2015
- 2015-11-03 CN CN201520866112.5U patent/CN205539166U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322442A (en) * | 2015-11-03 | 2016-02-10 | 海南中海电力工程有限公司 | Underground discharging apparatus and standby earth screen applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20170711 |
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| AV01 | Patent right actively abandoned |