CN112360703A - Lightning protection system of wind generating set - Google Patents
Lightning protection system of wind generating set Download PDFInfo
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- CN112360703A CN112360703A CN202011321604.8A CN202011321604A CN112360703A CN 112360703 A CN112360703 A CN 112360703A CN 202011321604 A CN202011321604 A CN 202011321604A CN 112360703 A CN112360703 A CN 112360703A
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- blade
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- lightning protection
- protection system
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 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
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims 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 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 208000025274 Lightning injury Diseases 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
- 230000000694 effects Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Elimination Of Static Electricity (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
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, the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptors are multiple and 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; this lightning protection system passes through the cooperation of metal mesh and arrester, can more effectually prevent that the blade from suffering the thunderbolt and damaging.
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 generally installed on open plains or mountaintops, making them more vulnerable to lightning strikes, where the highest risk of lightning strikes in a wind turbine includes the blades and the nacelle. At present, with the capacity of a wind turbine generator set continuously increasing, the length of a blade of a fan is longer and longer, so that the probability of lightning stroke of the fan is greatly increased; therefore, the blade is used as the component with the highest lightning risk of the wind turbine generator, and the reliability of lightning protection plays a decisive role in the safe operation of the wind turbine generator in the whole life cycle. Relevant documents show that in the insurance claim of the American wind power generation unit in 2012, the lightning damage proportion of the blade is as high as 41.4%, and the average compensation amount of each blade is about $ 24 ten thousand, so that the improvement of the reliability of the lightning protection system of the blade is significant.
Most of existing lightning protection systems only rely on lightning receptors to achieve a lightning protection effect, but the effect is still not ideal, especially under the condition that the length of a blade is increased, the blade is still difficult to effectively avoid being damaged by lightning by only relying on the lightning receptors, the loss caused by the lightning is also very huge, and under the condition, the problem that how to effectively prevent property loss and power generation loss caused by lightning strike is very urgent to solve by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a lightning protection system of a wind generating set, which can better prevent lightning from damaging a blade under the condition that the blade is 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, the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptors are multiple and arranged at the blade surface of the blade;
the shielding body includes metal mesh and water conservancy diversion strip, first arrester passes through the water conservancy diversion strip is connected with the metal mesh, the metal mesh still is connected with second arrester, ground conductor.
Further, the metal mesh is arranged between the middle and the surface of the blade shell section.
Further, the metal mesh completely wraps the blade shell.
Further, the metal mesh wraps the joint of the upper shell and the lower shell of the blade, and the second lightning receptor is connected with the metal mesh through the diversion strip.
Furthermore, one end of the metal net is 20-30cm away from the blade tip, and the other end of the metal net is positioned from the root part to the middle section of the blade.
Furthermore, a placing groove is formed in the blade shell, the diversion strips are wrapped with asbestos and placed in the placing groove, and the remaining gaps of the placing groove are filled with resin materials.
Furthermore, both ends of the metal mesh 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 thunder and lightning detector, and the meteorological information acquisition module and the thunder and lightning detector are both connected with the fan controller;
the meteorological information acquisition module is used for acquiring meteorological information through a network and sending the meteorological information to the fan controller;
the lightning detector is used for acquiring lightning information near the location of the fan and sending the 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 at least has the following advantages and beneficial effects:
this lightning protection system makes the damage that the blade can be better to resist the thunderbolt and cause through the combination that sets up metal mesh and arrester, the metal mesh passes through the water conservancy diversion strip with the arrester and is connected, the water conservancy diversion strip sets up in the recess of casing, it is fixed in the recess of blade casing by the resin after asbestos parcel again, it has not only kept the surperficial complete of blade, secondly also make the arrester when receiving the drainage of thunderbolt by the water conservancy diversion strip, the water conservancy diversion strip temperature risees and damages the blade, based on above, this lightning protection system can effectually avoid the damage that the thunderbolt caused to the blade.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a lightning protection system according to the 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-the first lightning receptor, 2-the second lightning receptor, 3-the guiding strip, 4-the metal mesh.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent 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 orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled 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 comprises a lightning receptor, a shield and a ground conductor; the lightning receptor comprises a first lightning receptor 1 and a second lightning receptor 2, 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 includes metal mesh 4 and water conservancy diversion strip 3, and first arrester 1 passes through water conservancy diversion strip 3 to be connected with metal mesh 4, and metal mesh 4 still is connected with second arrester 2, ground 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 made of copper or aluminum, because the instantaneous current is very large when lightning strike occurs, and the metal mesh 4 is easily melted and damaged by high temperature, so that a certain requirement is 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 a large influence on power generation, and the practice shows that the cross-sectional area of the metal mesh 4 is most suitable when the cross-sectional area of the fan blade model commonly used at present is 60-100mm 2; the cross-sectional area of the aluminium wire mesh 4 will be slightly larger than that of the copper wire mesh 4 due to the difference in melting points between aluminium and copper.
In an embodiment, as shown in fig. 1, the metal mesh 4 completely wraps the blade shell, i.e. the metal mesh 4 is directly wound around the blade shell for one turn, which completely wraps the blade, and can greatly avoid the damage of the blade caused by the lightning strike, but it also 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 only wraps 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, which has a high probability of being struck by lightning. Therefore, in order to reduce the overall weight of the blade, in this embodiment, the metal mesh 4 is wrapped only at the edge portions where the upper and lower shells of the blade are located. Due to the arrangement mode of the metal net 4, the second lightning receptor 2 on the blade needs to be connected with the metal net 4 through the diversion strip 3; the second lightning receptor 2 also needs to be connected to the metal mesh 4 by a weather strip 3 as with 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 of the blade, and the first lightning receptor 1 needs to be connected with the metal net 4 by using the diversion strip 3; the other end of the metal net 4 is located from the root to the middle section of the blade, wherein the most preferable one is that the other end of the metal net 4 is located at the middle section of the blade, because the probability of hitting the second half section of the blade in a lightning strike exceeds 90%, so that the weight of the blade is prevented from being increased more while achieving a better lightning protection effect, and preferably the other end of the metal net 4 is located at the middle section of the blade; of course, a larger coverage of the wire mesh 4 is also possible, and secondly, in order to further reduce the weight of the blade, the other end of the wire mesh 4 may also be at the blade tip to the middle section of the blade.
In order to keep the integrality and the aerodynamic performance of blade, seted up the standing groove on the blade casing, water conservancy diversion strip 3 parcel has the asbestos to put into the standing groove to use resin material to fill up the remaining space of standing groove, make the surface of blade keep complete and smooth. The purpose of using asbestos to wrap the guide strip 3 is to prevent high temperature generated during flow guiding from damaging fixed resin and the blade, so that the blade is protected by using high temperature resistant asbestos.
The both ends of metal mesh 4 all are connected with ground conductor, and ground conductor sets up inside the blade casing to form 3 to metal mesh 4 to ground conductor's drainage structure of lightning receptor to water conservancy diversion strip, this structure can furthest's protection blade, thereby avoid causing structural damage to the blade because of thunderbolt, lead to stopping production, thereby protection equipment and property that can furthest do not receive the loss.
The environment detection device comprises a meteorological information acquisition module and a thunder and lightning detector, wherein the meteorological information acquisition module and the thunder and lightning detector are both connected with the fan controller; the meteorological information acquisition module is used for acquiring meteorological information through a network and sending the meteorological information to the fan controller; the lightning detector is used for acquiring lightning information near the location of the fan 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 orientation of the fan.
The most studied at present is the lightning protection of a single fan, and the system also provides a multi-fan cooperative lightning protection mode which is suitable for areas with less influence of the topography on the layout of the fan, particularly for flat areas such as grasslands, and is most effective when the distance between the fans is 3-6 blades.
The working mode of the method is that a meteorological information acquisition module and a thunder and lightning detector are adopted to acquire predicted meteorological information and current real-time meteorological information such as thunder, lightning, wind direction and wind direction, wherein each fan of the real-time thunder, wind direction and wind direction information has independent measurement data, the data need to be transmitted to a cloud server, the cloud server judges the probability of lightning stroke according to the thunder and lightning information, and when the probability of lightning stroke is high, the wind direction suitable for most fans is analyzed according to the wind condition of each fan and the collected wind direction information, so that the wind directions of adjacent fans are consistent, and the purpose of cooperative lightning protection is achieved; when the wind direction of some of the fans is adjusted to be larger than the original wind direction, the rotating speed of the fans needs to be properly controlled to ensure the stress safety of the fans.
The cloud server is used for receiving information of the fan controllers of the fans in the wind power plant, feeding back corresponding instructions to the fan controllers of the fans after analyzing and processing the information, and the fan controllers are used for adjusting and controlling the fans.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
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 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, the first lightning receptor is arranged at the blade tip of the blade, and the second lightning receptors are multiple and arranged at the blade surface of the blade;
the shielding body includes metal mesh and water conservancy diversion strip, first arrester passes through the water conservancy diversion strip is connected with the metal mesh, the metal mesh still is connected with second arrester, ground conductor.
2. The lightning protection system of claim 1, wherein the metallic mesh is disposed between the middle and the surface of the blade shell profile.
3. The lightning protection system of claim 2, wherein the metallic mesh completely surrounds the blade shell.
4. The lightning protection system of claim 2, wherein the metallic mesh surrounds the junction of the upper and lower shells of the blade, and the second lightning receptor is connected to the metallic mesh by a tie bar.
5. The lightning protection system of claim 3 or 4, wherein one end of the metal mesh is 20-30cm from the blade tip and the other end of the metal mesh is located from the root to the middle section of the blade.
6. The lightning protection system of claim 5, wherein the blade shell is provided with a placement groove, the flow guide strip is wrapped with asbestos and placed in the placement groove, and the remaining gap of the placement groove is filled with a resin material.
7. The lightning protection system of claim 5, wherein both ends of the metallic mesh are connected to ground conductors disposed inside the blade shell.
8. The lightning protection system of claim 1, wherein the environmental detection device comprises a weather information acquisition module and a lightning detection instrument, both connected to the fan controller;
the meteorological information acquisition module is used for acquiring meteorological information through a network and sending the meteorological information to the fan controller;
the lightning detector is used for acquiring lightning information near the location of the fan and sending the 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.
9. The lightning protection system of claim 8, wherein the cloud server is configured to receive information about the wind turbine controller of a wind turbine in the wind farm and to feed back instructions to the wind turbine controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321604.8A CN112360703B (en) | 2020-11-23 | 2020-11-23 | Lightning protection system of wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321604.8A CN112360703B (en) | 2020-11-23 | 2020-11-23 | Lightning protection system of wind generating set |
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| Publication Number | Publication Date |
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| CN112360703A true CN112360703A (en) | 2021-02-12 |
| CN112360703B CN112360703B (en) | 2024-05-17 |
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| CN202011321604.8A Active CN112360703B (en) | 2020-11-23 | 2020-11-23 | Lightning protection system of wind generating set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877360A (en) * | 2022-06-29 | 2023-10-13 | 江苏金风科技有限公司 | Lightning protection device, lightning protection system, wind generating set and method |
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| 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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2020
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| 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 |
| US20140015251A1 (en) * | 2011-02-24 | 2014-01-16 | Vestas Wind Systems A/S | Safety system for a wind turbine |
| US20130336786A1 (en) * | 2012-06-18 | 2013-12-19 | Clipper Windpower, Llc | Automatic Inspection of a Lightning Protection System on a Wind Turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116877360A (en) * | 2022-06-29 | 2023-10-13 | 江苏金风科技有限公司 | Lightning protection device, lightning protection system, wind generating set and method |
| CN116877360B (en) * | 2022-06-29 | 2024-05-28 | 江苏金风科技有限公司 | Lightning protection device, lightning protection system, wind generating set and method |
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| CN112360703B (en) | 2024-05-17 |
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