CN112360703B - Lightning protection system of wind generating set - Google Patents
Lightning protection system of wind generating set Download PDFInfo
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- CN112360703B CN112360703B CN202011321604.8A CN202011321604A CN112360703B CN 112360703 B CN112360703 B CN 112360703B CN 202011321604 A CN202011321604 A CN 202011321604A CN 112360703 B CN112360703 B CN 112360703B
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- fan
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 48
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 239000010425 asbestos Substances 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 208000025274 Lightning injury Diseases 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 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 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a lightning protection system of a wind generating set, which comprises a blade lightning protection device, an environment detection device, a fan controller and a cloud server, wherein the blade lightning protection device is arranged on a blade, the environment detection device is arranged on a cabin shell, the fan controller is arranged in a cabin, and the environment detection device and the cloud server are both connected with the fan controller; the blade lightning protection device comprises a lightning receptor, a shielding body and a grounding conductor; the lightning receptor comprises a first lightning receptor and a second lightning receptor, wherein the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptor is provided with a plurality of lightning receptors and is arranged at the blade surface of the blade; the shielding body comprises a metal net and a flow guide strip, the first lightning receptor is connected with the metal net through the flow guide strip, and the metal net is also connected with the second lightning receptor and the grounding conductor; the lightning protection system can effectively prevent the damage of the blade caused by lightning strike through the cooperation of the metal net and the lightning receptor.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to a lightning protection system of a wind generating set.
Background
Wind turbines are typically installed on open plains or mountaintops, making them more vulnerable to lightning strikes, where the wind turbines include blades and nacelle where the risk of lightning strikes is highest. At present, as the capacity of the wind turbine is continuously increased, the length of the blades of the fan is longer and longer, so that the probability of lightning stroke of the fan is greatly increased; therefore, the reliability of the lightning protection of the blade serving as the component with the highest lightning risk of the wind turbine generator plays a decisive role in whether the wind turbine generator can safely run in the whole life cycle. The related literature shows that in the insurance claim of the American wind turbine generator in 2012, the lightning stroke damage proportion of the blade is up to 41.4%, and the average compensation amount is about 24 ten thousand dollars, so that the improvement of the reliability of the blade lightning protection system is significant.
The existing lightning protection system is mostly realized by only relying on the lightning arrester, but the lightning protection effect is still not ideal, and especially under the condition that the length of the blade is increased, the lightning arrester is only relied on to effectively avoid the damage of the blade caused by lightning strike, the loss caused by the lightning arrester is also huge, and under the condition, the problem that how to more effectively prevent the property loss and the generating capacity loss caused by the lightning strike is a very urgent problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a lightning protection system of a wind generating set, which can better prevent damage to blades caused by lightning strike under the condition that the blades are longer and longer.
The embodiment of the invention is realized by the following technical scheme:
The lightning protection system of the wind generating set comprises a blade lightning protection device, an environment detection device, a fan controller and a cloud server, wherein the blade lightning protection device is arranged on a blade, the environment detection device is arranged on a cabin shell, the fan controller is arranged in a cabin, and the environment detection device and the cloud server are both connected with the fan controller;
the blade lightning protection device comprises a lightning receptor, a shielding body and a grounding conductor;
The lightning receptor comprises a first lightning receptor and a second lightning receptor, wherein the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptor is provided with a plurality of lightning receptors and is arranged at the blade surface of the blade;
The shielding body comprises a metal net and a flow guide strip, the first lightning receptor is connected with the metal net through the flow guide strip, and the metal net is also connected with the second lightning receptor and the grounding conductor.
Further, the metal mesh is arranged between the middle of the section of the blade shell and the surface.
Further, the metal mesh completely wraps the blade shell.
Further, the metal net wraps the combination part of the upper shell and the lower shell of the blade, and the second lightning receptor is connected with the metal net through the flow guide strip.
Further, one end of the metal net is 20-30cm away from the blade tip, and the other end of the metal net is positioned between the root of the blade and the middle section of the blade.
Further, a placing groove is formed in the blade shell, asbestos is wrapped on the guide strip and placed in the placing groove, and the remaining gap of the placing groove is filled with resin materials.
Further, both ends of the metal net are connected with grounding conductors, and the grounding conductors are arranged inside the blade shell.
Further, the environment detection device comprises a meteorological information acquisition module and a lightning detector, wherein the meteorological information acquisition module and the lightning detector are both connected with the fan controller;
The weather information acquisition module is used for acquiring weather information through a network and sending the weather information to the fan controller;
the lightning detector is used for acquiring lightning information near the place where the fan is located and sending the lightning information to the fan controller;
And the fan controller is used for sending the information acquired by the environment monitoring device to the cloud server and receiving an instruction of the cloud server to control the direction of the fan.
Further, the cloud server is used for receiving information of the fan controller of the fan in the wind power plant and feeding back an instruction to the fan controller.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
This lightning protection system makes the damage that the blade caused by the lightning stroke through setting up the combination of metal mesh and lightning arrester, and the metal mesh passes through the guide bar with the lightning arrester and is connected, and the guide bar sets up in the recess of casing, and it is fixed in the recess of blade casing by the resin again after the asbestos parcel, and it has not only kept the surface of blade intact, and secondly also makes the lightning arrester when receiving the drainage of lightning stroke by the guide bar, and the guide bar temperature rise damages the blade, based on above, this lightning protection system can effectually avoid the damage that the lightning stroke caused the blade.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a lightning protection system according to the present invention when not mounted on a blade;
FIG. 2 is a schematic view of another embodiment of the lightning protection system of the invention when not mounted on a blade;
in the figure, 1-first lightning receptor, 2-second lightning receptor, 3-flow guiding strip and 4-metal net.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The lightning protection system of the wind generating set comprises a blade lightning protection device, an environment detection device, a fan controller and a cloud server, wherein the blade lightning protection device is arranged on a blade, the environment detection device is arranged on a cabin shell, the fan controller is arranged in a cabin, and the environment detection device and the cloud server are connected with the fan controller; as shown in fig. 1-2, the blade lightning protection device includes a lightning receptor, a shield, and a ground conductor; the lightning receptor comprises a first lightning receptor 1 and a second lightning receptor 2, wherein the first lightning receptor 1 is arranged at the blade tip of the blade, and the second lightning receptor 2 is provided with a plurality of lightning receptors and is arranged at the blade surface of the blade; the shielding body comprises a metal net 4 and a flow guide strip 3, the first lightning receptor 1 is connected with the metal net 4 through the flow guide strip 3, and the metal net 4 is also connected with the second lightning receptor 2 and a grounding conductor.
Wherein the metal mesh 4 is arranged between the middle and the surface of the section of the blade shell; it can be understood that the metal mesh 4 is usually copper or aluminum, and the instantaneous current is very large when lightning strike occurs, so that the metal mesh 4 is easily melted and damaged at high temperature, and therefore, certain requirements are imposed on the cross-sectional area of the metal mesh 4, but the weight of the blade cannot be greatly increased because the weight of the blade has great influence on power generation, and the practice proves that the cross-sectional area of the metal mesh 4 is most suitable when 60-100mm2 in the current common fan blade model; the cross-sectional area of the aluminum wire 4 will be slightly larger than that of the copper wire 4 due to the difference in melting points of aluminum and copper.
In an embodiment, as shown in fig. 1, the metal mesh 4 completely wraps the blade shell, that is, the metal mesh 4 is directly wound around the blade shell for one turn, and the blade is completely wrapped in this manner, so that the blade can be greatly prevented from being damaged by lightning strike, but the metal mesh 4 has a certain defect that the weight of the metal mesh 4 is relatively large.
Thus, in another embodiment, as shown in fig. 2, the metal mesh 4 wraps only the joint of the upper and lower shells of the blade, because the joint of the upper and lower shells belongs to the edge of the blade, and the probability of lightning striking the edge of the blade is large. Therefore, in order to reduce the overall weight of the blade, in this embodiment, only the edge portions where the upper and lower shells of the blade are located are wrapped with the metal mesh 4. Because of the arrangement of the metal mesh 4, the second lightning receptor 2 on the blade needs to be connected with the metal mesh 4 through the flow guide strip 3; the second lightning receptor 2 needs to be connected to the metal mesh 4 by means of the deflector 3 as the first lightning receptor 1.
Because the shape of the tip part of the blade is inconvenient to wrap by using the metal net 4, a gap of 20-30cm is reserved between one end of the metal net 4 and the tip, and the first lightning receptor 1 is also connected with the metal net 4 by using the guide strip 3; the other end of the metal mesh 4 is located at the root to the middle section of the blade, wherein it is most preferable that the other end of the metal mesh 4 is located at the middle section of the blade, because the probability of hitting the latter half of the blade in a lightning strike exceeds 90%, so that the weight of the blade is prevented from increasing more while the effect of lightning protection is obtained, and it is preferable that the other end of the metal mesh 4 is located at the middle section of the blade; of course, a larger coverage of the wire 4 is also possible, and secondly, to further reduce the weight of the blade, the other end of the wire 4 may also be located in the tip-to-blade intermediate section.
In order to maintain the integrity and aerodynamic performance of the blade, the blade shell is provided with a placement groove, the guide strip 3 is wrapped with asbestos and placed in the placement groove, and the remaining gaps of the placement groove are filled with resin materials, so that the surface of the blade is kept complete and smooth. The purpose of the asbestos is to prevent the high temperature generated by the guide strip 3 during the guide from damaging the fixing resin and the blade, so that the high temperature resistant asbestos is used for protecting the blade.
The both ends of metal mesh 4 all are connected with the earthing conductor, and the earthing conductor sets up inside the blade shell to form the drainage structure of lightning arrester to water conservancy diversion strip 3 to metal mesh 4 to the earthing conductor, this structure can furthest protect the blade, thereby avoid causing structural damage to the blade because of the thunderbolt, lead to stopping production, thereby can furthest's protective apparatus and property not receive the loss.
The environment detection device comprises a meteorological information acquisition module and a lightning detector, wherein the meteorological information acquisition module and the lightning detector are both connected with the fan controller; the weather information acquisition module is used for acquiring weather information through a network and sending the weather information to the fan controller; the lightning detector is used for acquiring lightning information near the place where the fan is located and sending the information to the fan controller; the fan controller is used for sending the information acquired by the environment monitoring device to the cloud server and receiving an instruction of the cloud server to control the direction of the fan.
The most studied at present is the lightning protection of single fan, and this system still provides a mode that many fans are in coordination with the lightning protection, and this kind of mode is applicable to the fan overall arrangement and receives the less region of topography influence, is particularly useful for flat areas such as grassland, and when interval between the fan is 3-6 blade length, this kind of mode of in coordination with the lightning protection is most effective.
The working mode of the method comprises the steps of acquiring weather information such as expected weather information, current real-time lightning and wind direction and wind force by adopting a weather information acquisition module and a lightning detector, wherein each fan of the real-time lightning, wind direction and wind force information has independent measurement data, the data are transmitted to a cloud server, the probability of lightning stroke is judged by the cloud server according to the lightning information, and when the probability of lightning stroke is high, the windward direction suitable for most fans is analyzed through the windward condition of each fan and the acquired wind force and wind direction information, so that the windward directions of adjacent fans are consistent, and the aim of collaborative lightning protection is achieved; when the windward direction of some fans is adjusted to be larger than the original windward direction, the rotating speed of the fans needs to be properly controlled so as to ensure the stress safety of the fans.
The cloud server is used for receiving information of fan controllers of fans in the wind power plant, feeding corresponding instructions back to the fan controllers of the fans after analysis and processing, and the fan controllers are used for achieving adjustment control of the fans.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The lightning protection system of the wind generating set is characterized by comprising a blade lightning protection device, an environment detection device, a fan controller and a cloud server, wherein the blade lightning protection device is arranged on a blade, the environment detection device is arranged on a cabin shell, the fan controller is arranged in a cabin, and the environment detection device and the cloud server are connected with the fan controller;
the blade lightning protection device comprises a lightning receptor, a shielding body and a grounding conductor;
The lightning receptor comprises a first lightning receptor and a second lightning receptor, wherein the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptor is provided with a plurality of lightning receptors and is arranged at the blade surface of the blade;
The shielding body comprises a metal net and a flow guide strip, the first lightning receptor is connected with the metal net through the flow guide strip, the metal net is also connected with the second lightning receptor, and both ends of the metal net are connected with a grounding conductor;
the blade shell is provided with a placing groove, the guide strip is wrapped with asbestos and placed in the placing groove, and the remaining gap of the placing groove is filled with resin materials;
The environment detection device comprises a meteorological information acquisition module and a lightning detector, wherein the meteorological information acquisition module and the lightning detector are both connected with the fan controller; the weather information acquisition module is used for acquiring weather information through a network and sending the weather information to the fan controller; the lightning detector is used for acquiring lightning information near the place where the fan is located and sending the lightning information to the fan controller;
The fan controller is used for sending the information acquired by the environment detection device to the cloud server and receiving an instruction of the cloud server to control the direction of the fan;
the cloud server is used for receiving information of the fan controller of the fan in the wind power plant and feeding back an instruction to the fan controller;
The lightning protection mode of the lightning protection system comprises the following steps: the method comprises the steps that a weather information acquisition module and a lightning detector are adopted to acquire expected weather information and current real-time lightning, wind direction and wind weather information, wherein each fan has independent measurement data, the data are transmitted to a cloud server, the probability of lightning strike is judged by the cloud server according to the lightning information, and when the probability of lightning strike is high, the windward direction suitable for most fans is analyzed through the windward condition of each fan and the collected wind direction information, so that the windward directions of adjacent fans are consistent, and collaborative lightning protection is formed; when the windward direction of part of fans is adjusted to be larger than the original windward direction, the rotating speed of the corresponding fans is properly controlled.
2. The lightning protection system of claim 1, wherein the metallic mesh is disposed between a middle of the blade shell section and the surface.
3. The lightning protection system of claim 2, wherein the metallic mesh completely encases the blade shell.
4. The lightning protection system of claim 2, wherein the metal mesh encloses the junction of the upper and lower shells of the blade, and the second lightning receptor is connected to the metal mesh by a deflector.
5. The lightning protection system according to claim 3 or4 wherein one end of the wire mesh is 20-30cm from the blade tip and the other end of the wire mesh is located from the root to the middle section of the blade.
6. The lightning protection system of claim 5, wherein the metallic mesh has ground conductors connected to both ends, the ground conductors being disposed within the blade shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321604.8A CN112360703B (en) | 2020-11-23 | Lightning protection system of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321604.8A CN112360703B (en) | 2020-11-23 | Lightning protection system of wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360703A CN112360703A (en) | 2021-02-12 |
| CN112360703B true CN112360703B (en) | 2024-05-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989767A (en) * | 2010-10-13 | 2011-03-23 | 中电国科(北京)科技有限公司 | Comprehensive measuring and controlling device of high voltage pole tower |
| EP2889477A1 (en) * | 2013-12-27 | 2015-07-01 | Mitsubishi Heavy Industries, Ltd. | Wind turbine lightning protection system and corresponding wind turbine rotor |
| CN206636708U (en) * | 2017-03-10 | 2017-11-14 | 明阳智慧能源集团股份公司 | A kind of blade lightning protection structures of wind power generating set |
| CN209195603U (en) * | 2018-12-25 | 2019-08-02 | 北京金风科创风电设备有限公司 | Blade lightning-protection system, blade and wind power generating set |
| DE102018109049A1 (en) * | 2018-04-17 | 2019-10-17 | Innogy Se | Testing of lightning conductors for wind turbines |
| CN111005840A (en) * | 2019-12-18 | 2020-04-14 | 合肥阳光新能源科技有限公司 | Fan control method and device and wind power generation system |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989767A (en) * | 2010-10-13 | 2011-03-23 | 中电国科(北京)科技有限公司 | Comprehensive measuring and controlling device of high voltage pole tower |
| EP2889477A1 (en) * | 2013-12-27 | 2015-07-01 | Mitsubishi Heavy Industries, Ltd. | Wind turbine lightning protection system and corresponding wind turbine rotor |
| CN206636708U (en) * | 2017-03-10 | 2017-11-14 | 明阳智慧能源集团股份公司 | A kind of blade lightning protection structures of wind power generating set |
| DE102018109049A1 (en) * | 2018-04-17 | 2019-10-17 | Innogy Se | Testing of lightning conductors for wind turbines |
| CN209195603U (en) * | 2018-12-25 | 2019-08-02 | 北京金风科创风电设备有限公司 | Blade lightning-protection system, blade and wind power generating set |
| CN111005840A (en) * | 2019-12-18 | 2020-04-14 | 合肥阳光新能源科技有限公司 | Fan control method and device and wind power generation system |
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