CN204577627U - A kind of earthing device reducing Wind turbines earth resistance - Google Patents
A kind of earthing device reducing Wind turbines earth resistance Download PDFInfo
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- CN204577627U CN204577627U CN201520321205.XU CN201520321205U CN204577627U CN 204577627 U CN204577627 U CN 204577627U CN 201520321205 U CN201520321205 U CN 201520321205U CN 204577627 U CN204577627 U CN 204577627U
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- ground loop
- wind turbines
- earth resistance
- earthing device
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Abstract
A kind of earthing device reducing Wind turbines earth resistance, comprise ground loop, many electrodes, ground loop and many electrodes are connected in parallel, many electrodes around ground loop with equal angular, outwards distribute radially downwards, connection between many electrodes is for being connected in parallel, and dispersed current of grounding grids is by ground loop, many electrode soil diffusions towards periphery.A kind of earthing device reducing Wind turbines earth resistance of the utility model, by the mode of a ground loop and the parallel connection of Duo Gen electrode, reduce the earth resistance of Wind turbines, there is the features such as structure is simple, cost is low, technique is simple, low-resistance value, high reliability.
Description
Technical field
A kind of earthing device reducing Wind turbines earth resistance of the utility model, belongs to grounding-for-lightning device field.
Background technology
Along with expanding economy, also more and more higher to the requirement of Wind turbines lightning withstand level.For the guarantee normal operation of Wind turbines and the consideration of personal safety, Wind turbines is provided with earthing device.But from the ruuning situation of wind energy turbine set, the Wind turbines that lightning fault occurs is mostly that the earth resistance of Wind turbines is higher.Wind turbines is in order to obtain more windy energy, and mostly build on high mountain or sandy beach, soil resistivity is all higher, usually needs by interconnected for each Wind turbines earthing device to realize falling resistance, thus improves the effect of lightning current of releasing, earth resistance is met the demands.Along with the height of Wind turbines single-machine capacity and tower cylinder constantly increases, in wind energy turbine set, Wind turbines spacing distance is increasing, makes that the earthing device of every typhoon group of motors is connected cost into the net more and more higher.As interconnected in cancelled, for the every typhoon group of motors of every platform arranges completely independently earthing device, affect by high soil resistivity, the earth resistance of traditional earthing device can not meet the demands.Therefore the new type grounding device proposing a kind of applicable Wind turbines is needed, both economical and practical, the earth resistance of Wind turbines can be allowed again to meet the demands.
The Chinese patent earth electrode (CN202523855U) of ground resistance of wind driven generator " reduce " provides a kind of earthing device of steel reinforcement cage, and resistance reducing effect is obvious, but its construction volume is comparatively large and structure is comparatively complicated comparatively speaking.
Chinese patent " welded earthing device for wind power generation tower tube (CN202103173U) " proposes a kind of good contact strengthening earthing device and tower cylinder, and that improves ground connection arrives conductive qualities, but its resistance reducing effect is not clearly.
In order to reduce the earth resistance of Wind turbines, the measure often adopted in Practical Project mainly comprises and adopts natural grounding, expands the ground network area, the size of Down conductor, increase earth electrode, beats the method such as deep-well, employing resistance reducing agent.But said method often also exists the low and problem that cost is higher of complex structure, complex process, reliability in implementation process.
Summary of the invention
For the deficiencies in the prior art, the utility model proposes a kind of earthing device reducing Wind turbines earth resistance, by the mode of a ground loop and the parallel connection of Duo Gen electrode, reduce the earth resistance of Wind turbines, there is the features such as structure is simple, cost is low, technique is simple, low-resistance value, high reliability.
The technical scheme that the utility model is taked is:
A kind of earthing device reducing Wind turbines earth resistance, comprise ground loop, many electrodes, ground loop and many electrodes are connected in parallel, many electrodes around ground loop with equal angular, outwards distribute radially downwards, connection between many electrodes is for being connected in parallel, and dispersed current of grounding grids is by ground loop, many electrode soil diffusions towards periphery.
Angle between ground loop and any electrode is 30 ° ~ 60 °,
The diameter of ground loop is 3 ~ 6 times of electrode length.
The length of many electrodes is all equal.
One end and the ground loop of electrode are welded to connect, and the other end of electrode is free end.
The shape of cross section of ground loop, electrode is consistent.
On the tower cylinder between ground and basis of the installation site of ground loop.
Ground loop is circular or regular polygon, is flat ring structure.
A kind of earthing device reducing Wind turbines earth resistance of the utility model, beneficial effect is as follows:
Utilize many electrodes in parallel as earth electrode, when the earth resistance of an electrode is R1, total earth resistance of many electrodes is R=R1
//R2 ... Rn, therefore make the earth resistance of whole earthing device greatly reduce, and along with the increase of number of electrodes, diffusing passage increases, and strengthens spark effect, reduces impulse earthed resistance.The utility model structure is simple, and floor space is few, and it is convenient to install, and effectively can reduce earth resistance.
Accompanying drawing explanation
Fig. 1 is the utility model apparatus structure schematic diagram;
Fig. 2 is the utility model device scheme of installation.
Embodiment
As shown in Figure 1, a kind of earthing device reducing Wind turbines earth resistance, comprise a ground loop 1, many electrodes 2, ground loop 1 and many electrodes 2 are for being connected in parallel, and in order to ensure that ground loop 1 contacts well with electrode 2, every root electrode 2 adopts the mode of welding to be connected with ground loop 1, and the other end of electrode 2 is free end, and all electrodes 2 all outwards distribute downwards with equal angular radially around ground loop 1.Ground loop 1 can be circular or regular polygon.The material of ground loop is stainless steel, and band steel welding is preferably made a flat ring of circle by the utility model, and the cross section of band steel is 120mm
2, thickness is 4mm, and the size of annulus is determined according to the size of tower of wind generating set cylinder.The diameter of the flat ring of the utility model circular is 10m.The material of electrode 2 is stainless steel, and the length of electrode 2 is determined according to the soil resistivity situation of Practical Project, and the length of the utility model preferred electrode 2 is 1.5m ~ 3m, and electrode 2 is 30 ° ~ about 60 ° with the angle of ground loop 1.Connection due to many electrodes 2 is mode in parallel, and total earth resistance of many electrodes is R=R1//R2 ... Rn, therefore the earth resistance of whole earthing device reduces, and along with the increase of electrode 2 quantity, diffusing passage increases, and strengthens spark effect, reduces impulse earthed resistance.
But consider the condition of construction of Practical Project, the increase of electrode 2 quantity can increase construction volume and cost.The utility model adopts 8 electrodes, and material is band steel, is divided into 8 points as the pad with electrode 2 using equidistant for ground loop 1.As shown in Figure 2, when Practical Project is constructed, earthing device of the present utility model is embedded in underground 1m, is enclosed between ground 5 and basis 6 on tower cylinder 4, fills the space between ground loop and tower cylinder with soil, and suitably reinforce.In the utility model, down conductor 3 adopts vertical welding to be connected with ground loop 1, when lightning current is invaded, by ground loop 1 and electrode 2 soil dissufion current towards periphery, to realize reducing earth resistance.
Claims (8)
1. one kind is reduced the earthing device of Wind turbines earth resistance, comprise ground loop (1), many electrodes (2), it is characterized in that, ground loop (1) and many electrodes (2) are connected in parallel, many electrodes (2) around ground loop (1) with equal angular, outwards distribute radially downwards, connection between many electrodes (2) is for being connected in parallel, and dispersed current of grounding grids is by ground loop (1), many electrode (2) soil diffusions towards periphery.
2. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, it is characterized in that, the angle between ground loop (1) and any electrode (2) is 30 ° ~ 60 °.
3. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, it is characterized in that, the diameter of ground loop (1) is 3 ~ 6 times of electrode (2) length.
4. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, it is characterized in that, the length of many electrodes (2) is all equal.
5. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, it is characterized in that, one end and the ground loop (1) of electrode (2) are welded to connect, and the other end of electrode (2) is free end.
6. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, it is characterized in that, the shape of cross section of ground loop (1), electrode (2) is consistent.
7. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, is characterized in that, on the tower cylinder (4) between ground (5) and basis (6) of the installation site of ground loop (1).
8. a kind of earthing device reducing Wind turbines earth resistance according to claim 1, is characterized in that, ground loop (1) is circular or regular polygon, is flat ring structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321205.XU CN204577627U (en) | 2015-05-19 | 2015-05-19 | A kind of earthing device reducing Wind turbines earth resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321205.XU CN204577627U (en) | 2015-05-19 | 2015-05-19 | A kind of earthing device reducing Wind turbines earth resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204577627U true CN204577627U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520321205.XU Expired - Fee Related CN204577627U (en) | 2015-05-19 | 2015-05-19 | A kind of earthing device reducing Wind turbines earth resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204577627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921206A (en) * | 2019-03-28 | 2019-06-21 | 河南四达电力科技研究院有限公司 | A kind of graphite-based aerial drainage earthing pole |
| CN110265800A (en) * | 2019-05-21 | 2019-09-20 | 中国建筑第八工程局有限公司 | Based on the earthing or grounding means and its construction method under the conditions of plate brad supporting |
-
2015
- 2015-05-19 CN CN201520321205.XU patent/CN204577627U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921206A (en) * | 2019-03-28 | 2019-06-21 | 河南四达电力科技研究院有限公司 | A kind of graphite-based aerial drainage earthing pole |
| CN110265800A (en) * | 2019-05-21 | 2019-09-20 | 中国建筑第八工程局有限公司 | Based on the earthing or grounding means and its construction method under the conditions of plate brad supporting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |