CN102946168B - Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set - Google Patents
Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set Download PDFInfo
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- CN102946168B CN102946168B CN201210472307.2A CN201210472307A CN102946168B CN 102946168 B CN102946168 B CN 102946168B CN 201210472307 A CN201210472307 A CN 201210472307A CN 102946168 B CN102946168 B CN 102946168B
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- 238000009413 insulation Methods 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 10
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- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000012634 fragment Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
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- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention provides a lightning protection device for a main bearing of a generator of a permanent magnet direct-drive wind generating set. According to the permanent magnet direct-drive wind generating set, the independent lightning current discharge channel is established without passing through the main bearing of the generator, so that the normal operation of the main bearing of the generator is effectively ensured, the service life of the main bearing of the generator is prolonged, the normal operation of the permanent magnet direct-drive wind generating set is ensured, the fault rate of the permanent magnet direct-drive wind generating set is reduced, and the generating efficiency of the permanent magnet direct-drive wind generating set is improved. In addition, the permanent magnet direct-drive wind generating set establishes an independent lightning current leakage channel, so that the electric conductivity of a lightning current leakage path is obviously improved.
Description
Technical field
The present invention relates to a kind of lightning protection device, more particularly, relate to a kind of base bearing impaired lightning protection device in lightning stroke process that prevents the generator of permanent magnet direct-driving aerogenerator group.
Background technology
Permanent magnet direct-driving aerogenerator group is conventionally arranged on spacious area or thunderstorm compares coastal area more frequently.Because permanent magnet direct-driving aerogenerator group belongs to protruding object, so be easily struck by lightning.The base bearing of the generator of permanent magnet direct-driving aerogenerator group is carrying the weight of impeller and generator, when being struck by lightning, the base bearing of generator is also as the only way which must be passed of lightning current, in this case, if the base bearing of generator is damaged when being struck by lightning, can affect the operation of whole permanent magnet direct-driving aerogenerator group.
Specifically, at present, most of permanent magnet direct-driving aerogenerator group utilizes the metal partss such as wheel hub, generator, base bearing, engine room foundation as lightning current path, but uses above-mentioned metal parts to be as the shortcoming of lightning current path: contact resistance is large, lightning current circulation is not smooth.In addition,, because the metal object moment temperature rise of being hit by lightning current is too high, can cause the fusing of lightning strike spot localized metallic.Conventionally, serious thunderbolt thermal effect there will be and on lightning current path, has relatively high-resistance place, and for example, between the lasso and roller of the base bearing of generator, particularly, in their relative motions, the situation of the damage causing is the most serious.After permanent magnet direct-driving aerogenerator group is struck by lightning, the flow through outer collar of base bearing of generator of lightning current, punctures the gap between outer collar and roller, makes arc discharge, roller is caused to damage, thereby damage base bearing.
In addition, also some permanent magnet direct-driving aerogenerator group gets around the base bearing of generator by the mode that downlead is connected with slip ring with lightning protection at present, thereby at the base bearing that suffers thunderstorm hour protection generator.But, with above-mentioned lightning protection, with the base bearing that the mode that downlead is connected with slip ring gets around generator, there is following shortcoming: this mode can only be arranged on lightning protection the middle part of dead axle with slip ring, because permanent magnet direct-driving aerogenerator group has had class signal slip ring on this position, guarantee electric equipment signal transmission between wheel hub and cabin, so extra slip-ring device is installed, will certainly cause interference to the rotating parts of original slip ring connection.And if a part for employing signal slip ring is as lightning channel, not only can not guarantees releasing completely of thunder energy, and can produce serious electromagnetic interference to ambient signals passage, even also can damage slip ring.
Summary of the invention
In order to solve base bearing impaired problem in lightning stroke process of existing permanent magnet direct-driving aerogenerator group, the present invention proposes a kind of lightning protection device, and described lightning protection device prevents from base bearing to cause damage by setting up independently lightning current leakage path.
Exemplary embodiment of the present invention provides a kind of lightning protection device of base bearing of generator of permanent magnet direct-driving aerogenerator group, and described lightning protection device comprises the circular orbit on the dead axle that is arranged on generator and the lightning protection brush that can slide on circular orbit.
Exemplary embodiment of the present invention, described circular orbit can be arranged on the brake base on the dead axle that is fixed on generator, and described circular orbit and the insulation of described brake base.
Exemplary embodiment of the present invention can arrange circular orbit insulation board on brake base, and described circular orbit is arranged on described circular orbit insulation board, thereby described circular orbit insulate by described circular orbit insulation board and described brake base.
Exemplary embodiment of the present invention, described circular orbit can be made by stainless steel.
Exemplary embodiment of the present invention, described circular orbit insulation board can be made by epoxy resin or nylon.
Exemplary embodiment of the present invention, described permanent magnet direct-driving aerogenerator group can comprise slip ring shift fork, slip ring rocking arm and slip ring, one end of slip ring shift fork is fixed on rotation axis, the other end of slip ring shift fork is connected with slip ring rocking arm, slip ring rocking arm is connected with the body of slip ring, the rotating part of slip ring is rotated with the rotation of generator, described lightning protection device also can comprise the brush carriage being arranged on slip ring shift fork, lightning protection brush is fixed on the end of described brush carriage, and described brush carriage and the insulation of described slip ring shift fork.
Exemplary embodiment of the present invention can arrange brush carriage insulation board on slip ring shift fork, and described brush carriage is arranged on described brush carriage insulation board, thereby described lightning protection brush insulate by described brush carriage insulation board and described slip ring shift fork.
Exemplary embodiment of the present invention, described lightning protection brush can be two, described two lightning protection brushes are separately fixed at the two ends of described brush carriage.
Exemplary embodiment of the present invention, described brush carriage insulation board can be made by epoxy resin or nylon.
Exemplary embodiment of the present invention, described lightning protection brush can comprise that described discharging gap part and circular orbit are spaced a predetermined distance from for making shell fragment and the discharging gap part of lightning protection brush and circular orbit close contact.
Exemplary embodiment of the present invention, the diameter of described circular orbit can be greater than the diameter of described slip ring, and described circular orbit and slip ring are separated.
Exemplary embodiment of the present invention, described lightning protection device also can comprise for collecting the dust-collecting box of the dust that process that lightning protection brush slides on circular orbit produces.
Exemplary embodiment of the present invention, described dust-collecting box can comprise inside and outside dust-collecting box and dust-collecting box lid, the diameter of described inside and outside dust-collecting box is identical with the internal-and external diameter of circular orbit respectively, thereby circular orbit and lightning protection brush are surrounded, described dust-collecting box lid is arranged on the outside of lightning protection brush, the shape of described dust-collecting box lid is corresponding with the shape of described circular orbit, and described dust-collecting box lid slides together with lightning protection brush on circular orbit.
Exemplary embodiment of the present invention can arrange seal between dust-collecting box lid and inside and outside dust-collecting box, with the dust diffusion that prevents that thunder-lightning brush from producing in sliding process.
Permanent magnet direct-driving aerogenerator group according to the present invention is by setting up lightning current leakage path independently and without the base bearing of generator, thereby effectively guarantee the normal operation of the base bearing of generator, extended the useful life of the base bearing of generator, thereby guarantee the normal operation of permanent magnet direct-driving aerogenerator group, reduce the failure rate of permanent magnet direct-driving aerogenerator group, also improved the generating efficiency of permanent magnet direct-driving aerogenerator group simultaneously.In addition, because permanent magnet direct-driving aerogenerator according to the present invention is set up and has been found independently lightning current leakage path, so significantly improved the release electrically conducting of path of lightning current.
Accompanying drawing explanation
By the description of exemplary embodiment being carried out below in conjunction with accompanying drawing, it is clear and easier to understand that these and/or other aspect of the present invention will become, in the accompanying drawings:
Fig. 1 is the front view illustrating according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 2 is the end view illustrating according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 3 is the front view illustrating according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 4 is the vertical view illustrating according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
Embodiment
Below, describe with reference to the accompanying drawings exemplary embodiment of the present invention in detail.Yet the present invention can implement with multiple different form, and should not be construed as be limited to exemplary embodiments set forth herein.In the accompanying drawings, for the sake of clarity, may exaggerate the size of parts, and identical label is indicated identical parts all the time.
Fig. 1 is the front view illustrating according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention, and Fig. 2 is the end view illustrating according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
As shown in Figures 1 and 2, according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention, comprise the circular orbit 2 on the dead axle 1 that is arranged on generator and the lightning protection brush 3 that can slide on circular orbit 2.
Specifically, can on the brake base 4 being fixed on the dead axle 1 of generator, circular orbit insulation board 5 be set, circular orbit 2 can be arranged on circular orbit insulation board 5.Alternatively, circular orbit 2 can be made by stainless steel; Circular orbit insulation board 5 can be made by epoxy resin, nylon or other suitable insulating material.
Although in this exemplary embodiment, circular orbit 2 is arranged on the brake base 4 on the dead axle 1 that is fixed on generator, and make circular orbit 2 and dead axle 1 insulation by circular orbit insulation board 5, but the invention is not restricted to this, circular orbit 2 can be arranged on dead axle 1 and with dead axle 1 and be insulated by other fixtures.
Alternatively, circular orbit 2 can be provided with the parts with cable termination sub-connection near cabin one side, on described parts, arrange porose, for example, with by securing member (, bolt) the connection wire of circular orbit 2 is fixed, then connect the lead-out wire from engine room inside.
Permanent magnet direct-driving aerogenerator group according to the present invention comprises slip ring shift fork 6, slip ring rocking arm 8 and slip ring 9.One end of slip ring shift fork 6 is fixed on rotation axis 7, and the other end of slip ring shift fork 6 is connected with slip ring rocking arm 8, and slip ring rocking arm 8 is connected with the body of slip ring 9, thereby the rotating part of slip ring 9 is rotated with the rotation of generator.Wherein, slip ring 9 arranges coaxially with dead axle 1.Brush carriage insulation board 10 is set on slip ring shift fork 6, and brush carriage insulation board 10 can be made by epoxy resin, nylon or other suitable insulating material.Fixed brush support 11 on brush carriage insulation board 10, lightning protection brush 3 can be fixed on the end of brush carriage 11, and in the present embodiment, lightning protection brush 3 can be two, is separately fixed at the two ends of brush carriage 11.
Although in this exemplary embodiment, lightning protection brush 3 is arranged on the brush carriage 11 being fixed on slip ring shift fork 6, and make lightning protection brush 3 and rotation axis 7 insulation by brush carriage insulation board 10, but the invention is not restricted to this, lightning protection brush 3 can be arranged on rotation axis 7 and with rotation axis 7 and be insulated by other fixtures.
In the present embodiment, slip ring 9 is arranged on the middle part of brake base 4, according to the size of slip ring 9, circular orbit 2 can not design too smallly, conflicts avoiding, with the body of slip ring 9, the diameter of circular orbit 2 is greater than the diameter of slip ring 9, thereby circular orbit 2 is spaced a predetermined distance from slip ring 9.
Alternatively, on slip ring shift fork 6 and brush carriage 11, arrange porose, to connect the lead-in wire from three blades.For fixing cable of drawing from blade, can on slip ring shift fork 6, increase more than at least 3 places and can be through the hole of binding strap, to guarantee fixing of cable.
When permanent magnet direct-driving aerogenerator group meets with thunderbolt, lightning current can conduct to circular orbit 2 via track lead-out wire 12 along blade downlead, then, by circular orbit 2 and dynamic friction between lightning protection brush 3, contacting the cabin that lightning current is sent to permanent magnet direct-driving aerogenerator group along brush lead-out wire 13 is the lightning protection device in tower cylinder, finally enters the earth again.
Fig. 3 is the front view illustrating according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention, and Fig. 4 is the vertical view illustrating according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
As shown in Figures 3 and 4, lightning protection brush 3 comprises shell fragment 31 and discharging gap part 32.The reason that discharging gap part 32 is set is: in use, lightning protection brush 3 there will be wearing and tearing, make shell fragment 31 lost its bounces of lightning protection brush 3, thereby deficiency is so that there is space with circular orbit 2 close contacts in thunder-lightning brush 3, makes the blocking-up of lightning current path.For fear of this situation, occur, profile of tooth discharging gap part 32 is set on lightning protection brush 3, this profile of tooth discharging gap part 32 does not contact with circular orbit 2 but is spaced a predetermined distance from circular orbit 2.While existing space to make the blocking-up of lightning current path between the lightning protection device of the base bearing of the generator of permanent magnet direct-driving aerogenerator group is due to lightning protection brush 3 and circular orbit 2; this profile of tooth discharging gap part 32 plays redundancy protecting effect, makes described lightning protection device still effective.In addition, the increase of discharging gap part 32 also can increase the discharge channel of lightning current, improves the release ability of lightning current of lightning protection brush 3 integral body.
In addition, the in the situation that of the long-time running of permanent magnet direct-driving aerogenerator group, the lightning protection brush 3 of the lightning protection device of base bearing can constantly produce dust, and these dust may enter in electrical control cubicles, oil nozzle or base bearing, thereby permanent magnet direct-driving aerogenerator group is broken down.In order to address the above problem, lightning protection brush 3 is carried out to following improvement: the first, the diameter of sliding rail 2 arranges littlely as required, in this case, because the rotating speed of generator is constant, so reduce the linear velocity of lightning protection brush 3, thereby reduce as far as possible the dust that lightning protection brush 3 produces.The second, lightning protection brush 3 is used the material that phosphorus content is lower to make as far as possible, for example, can use copper and carbon alloy to manufacture lightning protection brush 3, because use lightning protection brush 3 copper contents of copper and carbon alloy manufacture more than 80%, resistance to wear is very good, thereby the powder producing is few, and long service life.Three, dust-collecting box 14 (seeing Fig. 2) is set, dust-collecting box 14 is assembled loop configuration, comprises inside and outside dust-collecting box and dust-collecting box lid.The diameter of inside and outside dust-collecting box is identical with the internal-and external diameter of circular orbit 2 respectively, thereby circular orbit 2 and lightning protection brush 3 are surrounded.Dust-collecting box lid is arranged on the outside of lightning protection brush 3, the shape of dust-collecting box lid is corresponding with the shape of circular orbit 2, and dust-collecting box lid rotates together with lightning protection brush 3, between dust-collecting box lid and inside and outside dust-collecting box, seal is set, with the dust indiffusion of guaranteeing that lightning protection brush 3 produces in sliding process.
According to permanent magnet direct-driving aerogenerator group of the present invention; due on all lightning current paths; lightning protection device all with permanent magnet direct-driving aerogenerator group in metal parts (for example; wheel hub, generator, base bearing, engine room foundation etc.) insulation completely; so this lightning protection device gets around the base bearing of the generator of permanent magnet direct-driving aerogenerator group completely, thereby base bearing is carried out to lightning protection thoroughly.
According to permanent magnet direct-driving aerogenerator group of the present invention, new circular orbit and lightning protection brush are set in the outer ring of original slip ring, by the CONTACT WITH FRICTION between circular orbit and lightning protection brush, can guarantee that permanent magnet direct-driving aerogenerator group provides reliable thunder and lightning path when moving.
Permanent magnet direct-driving aerogenerator group according to the present invention is by setting up lightning current leakage path independently and without the base bearing of generator, thereby effectively guarantee the normal operation of the base bearing of generator, extended the useful life of the base bearing of generator, thereby guarantee the normal operation of permanent magnet direct-driving aerogenerator group, reduce the failure rate of permanent magnet direct-driving aerogenerator group, also improved the generating efficiency of permanent magnet direct-driving aerogenerator group simultaneously.In addition, because permanent magnet direct-driving aerogenerator according to the present invention is set up and has been found independently lightning current leakage path, so significantly improved the release electrically conducting of path of lightning current.
Although illustrated by reference to the accompanying drawings and described some exemplary embodiments, but what it should be appreciated by those skilled in the art is, in the situation that do not depart from principle of the present invention and the spirit that is limited its scope by claim and equivalent thereof, can modify and modification to these exemplary embodiments.
Claims (13)
1. a lightning protection device for the base bearing of the generator of permanent magnet direct-driving aerogenerator group, wherein, described lightning protection device comprises the circular orbit on the dead axle that is arranged on generator and the lightning protection brush that can slide on circular orbit,
Wherein, described permanent magnet direct-driving aerogenerator group comprises slip ring shift fork, slip ring rocking arm and slip ring, one end of slip ring shift fork is fixed on rotation axis, the other end of slip ring shift fork is connected with slip ring rocking arm, slip ring rocking arm is connected with the body of slip ring, and the rotating part of slip ring is rotated with the rotation of generator, and described lightning protection device also comprises the brush carriage being arranged on slip ring shift fork, lightning protection brush is fixed on the end of described brush carriage, and described brush carriage and the insulation of described slip ring shift fork.
2. lightning protection device as claimed in claim 1, wherein, described circular orbit is arranged on the brake base on the dead axle that is fixed on generator, and described circular orbit and the insulation of described brake base.
3. lightning protection device as claimed in claim 2, wherein, circular orbit insulation board is set on brake base, and described circular orbit is arranged on described circular orbit insulation board, thereby described circular orbit insulate by described circular orbit insulation board and described brake base.
4. lightning protection device as claimed in claim 3, wherein, described circular orbit is made by stainless steel.
5. lightning protection device as claimed in claim 3, wherein, described circular orbit insulation board is made by epoxy resin or nylon.
6. lightning protection device as claimed in claim 1, wherein, brush carriage insulation board is set on slip ring shift fork, and described brush carriage is arranged on described brush carriage insulation board, thereby described lightning protection brush insulate by described brush carriage insulation board and described slip ring shift fork.
7. lightning protection device as claimed in claim 1, wherein, described lightning protection brush is two, described two lightning protection brushes are separately fixed at the two ends of described brush carriage.
8. lightning protection device as claimed in claim 6, wherein, described brush carriage insulation board is made by epoxy resin or nylon.
9. lightning protection device as claimed in claim 1, wherein, described lightning protection brush comprises that described discharging gap part and circular orbit are spaced a predetermined distance from for making shell fragment and the discharging gap part of lightning protection brush and circular orbit close contact.
10. lightning protection device as claimed in claim 1, wherein, the diameter of described circular orbit is greater than the diameter of described slip ring, and described circular orbit and slip ring are separated.
11. lightning protection devices as claimed in claim 1, wherein, described lightning protection device also comprises for collecting the dust-collecting box of the dust that process that lightning protection brush slides on circular orbit produces.
12. lightning protection devices as claimed in claim 11, wherein, described dust-collecting box comprises inside and outside dust-collecting box and dust-collecting box lid, the diameter of described inside and outside dust-collecting box is identical with the internal-and external diameter of circular orbit respectively, thereby circular orbit and lightning protection brush are surrounded, described dust-collecting box lid is arranged on the outside of lightning protection brush, and the shape of described dust-collecting box lid is corresponding with the shape of described circular orbit, and described dust-collecting box lid slides together with lightning protection brush on circular orbit.
13. lightning protection devices as claimed in claim 12 wherein, arrange seal between dust-collecting box lid and inside and outside dust-collecting box, with the dust diffusion that prevents that thunder-lightning brush from producing in sliding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210472307.2A CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210472307.2A CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
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| Publication Number | Publication Date |
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| CN102946168A CN102946168A (en) | 2013-02-27 |
| CN102946168B true CN102946168B (en) | 2014-09-17 |
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| CN201210472307.2A Active CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104495656B (en) * | 2014-12-16 | 2017-12-15 | 太原重工股份有限公司 | A kind of crane and its lightning arrester |
| CN109253057A (en) * | 2018-08-28 | 2019-01-22 | 新疆金风科技股份有限公司 | The installation method of the lightning-protection system of permanent magnet direct-driving aerogenerator group |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005151749A (en) * | 2003-11-18 | 2005-06-09 | Ntn Corp | Lightning protection device of wind turbine generator bearing and bearing of the device |
| KR100934792B1 (en) * | 2007-12-28 | 2009-12-31 | 주식회사 효성 | Grounding device of wind power generator |
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- 2012-11-20 CN CN201210472307.2A patent/CN102946168B/en active Active
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| CN1711418A (en) * | 2002-11-12 | 2005-12-21 | Lm玻璃纤维制品有限公司 | Lightning protection of a pitch-controlled wind turbine blade |
| EP1925820A1 (en) * | 2006-11-23 | 2008-05-28 | Harakosan Co. Ltd. | Wind turbine main bearing |
| CN102395785A (en) * | 2009-04-17 | 2012-03-28 | 泰科电子英国有限公司 | Wind turbine lightning protection and monitoring systems |
| CN102652221A (en) * | 2009-12-09 | 2012-08-29 | 西门子公司 | Lightning protection system for a wind turbine and wind turbine with a lightning protection system |
| CN102767487A (en) * | 2011-05-03 | 2012-11-07 | 西门子公司 | Lightning protection system for a wind turbine and method for protecting components of a wind turbine against lightning strikes |
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