• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Electric charge dissipation system for a wind turbine blade, wind turbine blade and related method. The present invention relates to an electric charge dissipation system for a wind turbine blade in compliance with the lightning protection system and/or with the ability to mitigate dirt problems on wind turbine generator blades. A second object of the invention is the wind turbine blade comprising the dissipation system for the electric charge. A third object of the invention is a method of dissipating electrical charges on a wind turbine blade. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2774169A1
    申请号:ES201900007
    申请日:2019-01-16
    公开日:2020-07-17
    发明作者:Nomen Victor March；Solana Vicente Sanz；Rabanal Yolanda Bautista；Pena Adriana Belda；Babiano Almudena Munoz
    申请人:Siemens Gamesa Renewable Energy Innovation and Technology SL；
    IPC主号:
    专利说明:

    [0004] OBJECT OF THE INVENTION
    [0006] The present invention relates to an electrical charge dissipation system for a wind turbine blade. The present invention relates to electrical charge dissipation systems in compliance with the lightning protection system and or with the ability to mitigate fouling problems on wind turbine generator blades.
    [0008] A second object of the invention is the wind turbine blade that comprises the electrical charge dissipation system.
    [0010] A third object of the invention is a method for dissipating electrical charges in a wind turbine blade.
    [0012] BACKGROUND OF THE INVENTION
    [0014] Document US2497924 dealing with the problem of static electricity on an airplane surface is known in the state of the art. This problem arose in the aeronautical industry with the inclusion of electrical equipment in airplanes and the breakdown of these devices when subjected to storm clouds and ice, rain or dust. Also, the plane is isolated from the ground. Therefore, it is not possible to have a ground wire during flight to dissipate static electricity. This system is based on corona discharges arranged on the aircraft wings that connect to the metal surface and discharge static electricity into the air. This reduces the potential rise in the aircraft which protects electrical and electronic devices.
    [0016] Document US3260893 is also known related to the electrostatic discharge system for aircraft that compensates the natural potential to which the aircraft is subjected, through the use of a system based on a generator that can generate high voltages in direct current to bring the aircraft to the same natural potential in the area. It also includes a sensor to measure the reference potential that the generator needs to reach.
    [0018] The present applicant does not know of any electrical charge dissipation system for a wind turbine blade that solves the aforementioned drawbacks.
    [0020] The electrical charge dissipation system for a wind turbine blade and the related method of the present invention solve the aforementioned drawbacks by providing an electrical charge dissipation system for a wind turbine blade that avoids static electricity on the surface of shovel and accumulated static electricity in lightning protection systems without influencing the operation of the lightning protection system itself.
    [0022] DESCRIPTION OF THE INVENTION
    [0024] The present invention relates to an electrical charge dissipation system for a wind turbine blade in which static electricity collects charged particles and these are guided to the root of the blade.
    [0026] Additionally, the electrical charge dissipation system for a wind turbine blade of the present invention solves the previous drawbacks of the state of the art:
    [0027] • Avoid static electricity on the surface of the blade due to:
    [0028] o Static precipitation:
    [0029] ■ the presence of the wind turbine in a storm, and
    [0030] ■ triboelectric (friction) charging caused by neutral snow, rain, sandstorm or,
    [0031] ■ bombardment of dust particles on the front surface of the blade.
    [0032] • Prevents static electricity built up on the lightning protection system without influencing the operation of the lightning protection system itself.
    [0033] • Mitigates dirt build-up by reducing static charge.
    [0034] The electrical charge dissipation system for a wind turbine blade, wherein the wind turbine blade comprises a root, an inner surface, an outer surface, and a first conductive paint arranged at least partially on the outer surface, comprises:
    [0035] • at least one metal receiver assembly arranged at least partially on the outer surface of the blade, and
    [0036] • at least one lead wire connected to at least one metal receiver assembly and,
    [0037] wherein the system further comprises at least one first antistatic element configured to electrically connect the first conductive paint arranged at least partially on the outer surface of the blade with the at least one metallic receiver assembly.
    [0039] Optionally, the wind turbine blade comprises a metal plate for connecting the blade to a hub of a wind turbine, wherein the at least one lead wire is also connected to the metal plate.
    [0041] Preferably, the at least one first antistatic element is a resistive element comprising a resistance in the range [1 kü, 10 MQ].
    [0043] Thus configured, the electrical charge dissipation system for a wind turbine blade of the present invention allows the discharge of the static charge optionally to the hub through the metal plate, preferably being a ring of a blade bearing, without be affected by no lightning strike since lightning strikes normally remove paint near the metal receiver assembly by interrupting the path between the first conductive paint arranged at least partially on the outer surface of the blade and the conductive cable connected to the at least one metal receiver assembly. In addition, the at least one first antistatic element thus configured ensures the contact between the first conductive paint and the at least one metallic receiver assembly.
    [0045] Optionally, the metallic receiver assembly comprises:
    [0046] • at least one metal receiving bolt arranged on the outer surface of the blade, and
    [0047] • at least one metal receiver block connected to the at least one bolt metal receiver.
    [0049] Optionally, the system further comprises at least one second antistatic element arranged between the at least one conductive cable and the metal plate that prevents the flow of lightning currents through it, acting as an insulator for said currents.
    [0051] Preferably, the at least one second antistatic element is arranged adjacent to the metal plate.
    [0053] Preferably, the at least one second antistatic element is arranged, at least partially, on the inner surface of the blade.
    [0055] Preferably, the at least one second antistatic element is a resistive element comprising a resistance in the range [1 kQ, 10 MQ].
    [0057] Preferably, the at least one second antistatic element comprises a paint mat that minimizes paint on the shovel.
    [0059] Alternatively, the at least one second antistatic element comprises a bar that allows faster mounting of the at least one second antistatic element between the at least one lead wire and the metal plate in a manner similar to a quick plug device.
    [0061] Optionally, the system further comprises a metal band arranged on the outer surface of the blade, which is adjacent to the at least one third antistatic element, wherein between the metallic band and the at least one third antistatic element, and the outer surface of the blade, a second paint or sheet or conductive piece is arranged, in which the metal strip is connected to the at least one conductive cable. This is an additional collection point for static electricity.
    [0063] Preferably, the metal strip, the at least one third antistatic element and the second paint or conductive sheet or piece are arranged at the root of the blade.
    [0064] Preferably, the first conductive paint arranged at least partially on the outer surface of the wind turbine blade comprises a surface resistivity <1012 Q / square, which is two orders of magnitude below the state of the art for conductive paints.
    [0066] Also preferably, the at least one third antistatic element comprises a surface resistivity <1012 Q / square, which is two orders of magnitude below the state of the art for conductive paints.
    [0068] The present invention also relates to a wind turbine blade comprising the electrical charge dissipation system described above.
    [0070] The present invention also relates to a method for dissipating electrical charge in a wind turbine blade, wherein the wind turbine blade comprises:
    [0071] • a root
    [0072] • an internal surface,
    [0073] • an external surface,
    [0074] • a first conductive paint arranged at least partially on the external surface,
    [0075] • at least one metal receiver assembly arranged at least partially on the external surface, and
    [0076] • at least one lead wire connected to at least one metal receiver assembly, and
    [0077] wherein the method comprises a first step of electrically connecting the first conductive paint arranged at least partially on the outer surface of the blade with the at least one metallic receiver assembly by means of at least one first antistatic element.
    [0079] Optionally, the wind turbine blade comprises a metal plate for connecting the blade to a hub of a wind turbine and the method further comprises a second step of electrically connecting the at least one conductive wire to the metal plate.
    [0081] Preferably, the first step of electrically connecting the first conductive paint arranged at least partially on the outer surface of the blade with the at least one metal receiver assembly by means of the at least one first antistatic element is carried out by placing a resistive element comprising a resistance in the range [1 kü, 10 MQ].
    [0083] Preferably, the second step of electrically connecting the at least one conductive wire to the metal plate is carried out by means of at least one second antistatic element.
    [0085] Preferably, the second step of electrically connecting the at least one conductive cable to the metal plate by means of the at least one second antistatic element is carried out at a location adjacent to the metal plate, preferably at a location located at least partially on the inner surface of the blade.
    [0087] Preferably, the second step of electrically connecting the at least one conductive wire to the metal plate by means of the at least one second antistatic element is carried out by placing a resistive element comprising a resistance in the range [1 kü, 10 MQ] ,
    [0089] Optionally, the method further comprises a further step of electrically connecting a metallic strip arranged on the outer surface of the blade, preferably metallic strip arranged at the root of the blade, to at least one conductive wire.
    [0091] BRIEF DESCRIPTION OF THE DRAWINGS
    [0093] Figure 1 shows an elevation view of the electrical charge dissipation system for a wind turbine blade of the present invention.
    [0095] Figure 2 shows a view of section AA of figure 1, in which the at least one first antistatic element configured to electrically connect the first conductive paint arranged at least partially on the outer surface of the blade with the at least a metal receiver assembly.
    [0097] Figure 3 shows a schematic view of the inside of the blade in the area of the root of the blade in which is represented the at least one second antistatic element comprising a paint mat that is arranged between the at least one conductive wire and the metal plate.
    [0099] Figure 4 shows a schematic view of the inside of the blade in the area of the root of the blade in which the at least one second antistatic element is represented, comprising a bar that is arranged between the at least one conductive cable and the plate metallic.
    [0101] Figure 5 shows a view of the section BB of figure 1, in which the metallic band arranged on the outer surface of the blade that is adjacent to the at least one third antistatic element and the second paint or sheet or piece are shown conductive.
    [0103] PREFERRED EMBODIMENT OF THE INVENTION
    [0105] In a preferred embodiment of the invention, the electrical charge dissipation system for a wind turbine blade (1), in which the wind turbine blade (1) comprises a root (2), an internal surface (3) , an external surface (4) and a first conductive paint (5) arranged at least partially on the external surface (4), comprises:
    [0106] • at least one metallic receiver assembly (7, 8) arranged at least partially on the external surface (4) of the blade (1), which in turn comprises:
    [0107] or at least one metal receiver screw (7) arranged on the external surface (4) of the blade (1), and
    [0108] or at least one metallic receiver block (8) connected to the at least one metallic receiver bolt (7), and
    [0109] • at least one conductor cable (9) connected to the at least one metallic receiver assembly (7, 8),
    [0110] wherein the system further comprises at least one first antistatic element (10) configured to electrically connect the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one set metal receptor (7, 8).
    [0111] Optionally, the wind turbine blade (1) comprises a metal plate (6) to connect the blade (1) to a hub of a wind turbine (not shown), in which the at least one lead wire (9) is connected also to the metal plate (6).
    [0113] The at least one first antistatic element (10) is a resistive element comprising a resistance in the range [1 kQ, 10 MQ], preferably comprising a resistance in the range [10 kQ, 1 MQ].
    [0115] The system further comprises at least one second antistatic element (11), preferably comprising a paint mat, arranged between the at least one conductive wire (9) and the metal plate (6), in which the at least one second element antistatic (11) is arranged adjacent to the metal plate (6) and, at least partially, on the internal surface (3) of the blade (1).
    [0117] The at least one second antistatic element (11) is a resistive element comprising a resistance in the range [1 kQ, 10 MQ], preferably comprising a resistance in the range [10 kQ, 1 MQ].
    [0119] The system further comprises a metal band (12) arranged on the external surface of the blade (4), which is adjacent to at least one third antistatic element (13), in which between the metal band (12) and the at least a third antistatic element (13), and the external surface (4) of the blade (1), a second paint or sheet or conductive piece (14) is arranged, in which the metal band (12) is connected to the least one conductive cable (9), preferably by means of a metal device, preferably a screw (15) and nut (16) system, and in which the metal band (12), the at least one third antistatic element (13 ) and the second paint or sheet or conductive piece (14) are arranged at the root (2) of the blade (1),
    [0121] The present invention also relates to a wind turbine blade (1) comprising the electrical charge dissipation system described above.
    [0123] The present invention also relates to a method for dissipating electrical charge in a wind turbine blade (1), in which the wind turbine blade (1) comprises:
    [0124] • a root (2),
    [0125] • an internal surface (3),
    [0126] • an external surface (4),
    [0127] • optionally a metal plate (6) to connect the blade (1) to a hub of a wind turbine,
    [0128] • a first conductive paint (5) arranged at least partially on the external surface (4),
    [0129] • at least one metallic receiver assembly (7, 8) arranged on the external surface, which in turn comprises:
    [0130] or at least one metal receiver screw (7) arranged on the external surface (4) of the blade (1), and
    [0131] or at least one metallic receiver block (8) connected to the at least one metallic receiver bolt (7), and
    [0132] • at least one conductor cable (9) connected to the at least one metallic receiver assembly (7, 8) and to the metallic plate (6), and
    [0133] wherein the method comprises a first step of electrically connecting the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one metallic receiver assembly (7, 8) by means of at least one first antistatic element (10), and optionally a second step of electrically connecting the at least one conductive wire (9) to the metal plate (6).
    [0135] The first step of electrically connecting the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one metallic receiver assembly (7, 8) by means of at least one first Antistatic element (10) is carried out by placing a resistive element comprising a resistance in the range [1 kü, 10 MQ], preferably by placing a resistive element comprising a resistance in the range [10 kü, 1 MQ].
    [0137] The second stage of electrically connecting the at least one conductive cable (9) to the metal plate (6) is carried out by means of at least one second antistatic element (11), the second stage carried out in a place located adjacent to the metal plate (6), preferably in a place located at least partially on the internal surface (3) of the blade.
    [0138] The second step of electrically connecting the at least one conductive cable (9) to the metal plate (6) by means of the at least one second antistatic element (11) is carried out by placing a resistive element comprising a resistance in the range [1 kü, 10 MQ], preferably by placing a resistive element comprising a resistance in the range [10 kü, 1 MQ].
    [0140] Preferably, the method further comprises an additional step of electrically connecting a metallic strip (12) arranged on the external surface (4) at the root (2) of the blade (1), to at least one conductive cable (9).
    [0142] The additional step further comprises a sub-step of electrically connecting the metal strip (12) to at least one third antistatic element (13) adjacent to the metal strip (12), and arranging a second paint or conductive sheet or piece (14) between the metal strip (12) and the at least one third antistatic element (13), and the external surface (4) of the blade (1).
    [0144] Laboratory tests support the fact that lightning currents are not capable of circulating through these antistatic elements (10, 11, 13), and that the insulation level is the same as for any insulator.
    权利要求:
    Claims (25)
    [1]
    1. Electric charge dissipation system for a wind turbine blade (1), in which the wind turbine blade (1) comprises a root (2), an internal surface (3), an external surface (4) and a first conductive paint (5) arranged at least partially on the external surface (4), wherein the system comprises:
    • at least one metal receiver assembly (7, 8) arranged at least partially on the external surface (4) of the blade (1),
    • at least one conductor cable (9) connected to the at least one metallic receiver assembly (7, 8),
    characterized in that the system further comprises at least one first antistatic element (10) configured to electrically connect the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one set metal receptor (7, 8).
    [2]
    2. Electrical charge dissipation system for a wind turbine blade (1) according to claim 1, wherein the wind turbine blade (1) comprises a metal plate (6) for connecting the blade (1 ) to a hub of a wind turbine, characterized in that the at least one conductor cable (9) is also connected to the metal plate (6).
    [3]
    3. Electrical charge dissipation system for a wind turbine blade (1) according to claim 2, characterized in that it further comprises at least one second antistatic element (11) arranged between the at least one conductive cable (9) and the metal plate (6).
    [4]
    4. Electrical charge dissipation system for a wind turbine blade (1) according to claim 3 characterized in that at least one second antistatic element (11) is arranged adjacent to the metal plate (6).
    [5]
    5. Electrical charge dissipation system for a wind turbine blade (1) according to any of claims 3 or 4 characterized in that at least one second antistatic element (11) is arranged, at least partially, on the surface internal (3) of the blade (1).
    [6]
    6. Electrical charge dissipation system for a wind turbine blade (1) according to any of claims 3 to 5, characterized in that the at least one second antistatic element (11) is a resistive element comprising a resistance in the range [1 kü, 10 MQ], preferably comprising a resistance in the range [10 kü, 1 MQ].
    [7]
    7. Electrical charge dissipation system for a wind turbine blade (1) according to any of claims 3 to 6 characterized in that the at least one second antistatic element (11) comprises a paint mat.
    [8]
    8. Electric charge dissipation system for a wind turbine blade (1) according to any of claims 3 to 6 characterized in that the at least one second antistatic element (11) comprises a bar.
    [9]
    9. Electrical charge dissipation system for a wind turbine blade (1) according to any of the preceding claims, characterized in that the at least one metallic receiver assembly (7, 8) arranged at least partially on the external surface ( 4) of the blade (1) comprises:
    or at least one metal receiver screw (7) arranged on the external surface (4) of the blade (1), and
    or at least one metallic receptor block (8) connected to at least one metallic receptor bolt (7).
    [10]
    10. Electric charge dissipation system for a wind turbine blade (1) according to any of the preceding claims, characterized in that the at least one first antistatic element (10) is a resistive element comprising a resistance in the range [1 kü, 10 MQ], preferably comprising a resistance in the range [10 kü, 1 MQ].
    [11]
    11. System for dissipating electrical charge for a wind turbine blade (1) according to any of the preceding claims, characterized in that it also comprises a metal band (12) arranged on the external surface of the blade (4), which is adjacent to at least a third antistatic element (13), in which between the metal band (12) and the at least one third antistatic element (13), and the external surface (4) of the blade (1), is have a second painting or sheet or conductive part (14), in which the metallic strip (12) is connected to the at least one conductive cable (9).
    [12]
    12. Electrical charge dissipation system for a wind turbine blade (1) according to claim 11 characterized in that the metal strip (12) is connected to the at least one conductive cable (9) by means of a device metal, preferably a screw (15) and nut (16) system.
    [13]
    13. Electrical charge dissipation system for a wind turbine blade (1) according to any of claims 11 or 12, characterized in that in which the metal band (12), the at least one third antistatic element (13 ) and the second paint or sheet or conductive piece (14) are arranged at the root (2) of the blade (1).
    [14]
    14. Electrical charge dissipation system for a wind turbine blade (1) according to any of claims 11 to 13 characterized in that the at least one third antistatic element (13) comprises a surface resistivity <1012 Q / square .
    [15]
    15. Wind turbine blade (1) comprising the electrical charge dissipation system of any of the preceding claims.
    [16]
    16. Wind turbine blade (1) according to claim 15 further comprising a root (2), an inner surface (3), an outer surface (4) and a first conductive paint (5) arranged at least partially on the external surface (4), characterized in that the first conductive paint (5) arranged at least partially on the external surface (4) comprises a surface resistivity <1012 Q / square.
    [17]
    17. A method of dissipating electrical charge in a wind turbine blade (1), wherein the wind turbine blade (1) comprises:
    • a root (2),
    • an internal surface (3),
    • an external surface (4),
    • a first conductive paint (5) arranged at least partially on the external surface (4),
    • at least one metallic receiver assembly (7, 8) arranged on the external surface (4),
    • at least one conductor cable (9) connected to at least one metallic receiver assembly (7, 8), and
    characterized in that the method comprises a first step of electrically connecting the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one metallic receiver assembly (7, 8) by means of at least one first antistatic element (10).
    [18]
    18. Method for dissipating electrical charge in a wind turbine blade (1) according to claim 17, wherein the wind turbine blade comprises a metal plate (6) for connecting the blade (1) to a hub of a wind turbine and the method further comprises a second step of electrically connecting the at least one conductive wire (9) to the metal plate (6).
    [19]
    19. Method for dissipating the electrical charge in a wind turbine blade (1) according to any one of claims 16 to 18 characterized in that the first step of electrically connecting the first conductive paint (5) arranged at least partially on the external surface (4) of the blade (1) with the at least one metal receiver assembly (7, 8) by means of at least one first antistatic element (10) is carried out by placing a resistive element comprising a resistance in the interval [1 kü, 10 MQ], preferably placing a resistive element comprising a resistance in the interval [10 KQ, 1 MQ].
    [20]
    20. Method for dissipating the electrical charge in a wind turbine blade (1) according to claims 18 characterized in that the second step of electrically connecting the at least one conductive wire (9) to the metal plate (6) is carried carried out by means of at least one second antistatic element (11).
    [21]
    21. Method for dissipating the electric charge in a wind turbine blade (1) according to claim 20 characterized in that the second stage is carried out in a place located adjacent to the metal plate (6).
    [22]
    22. Method for dissipating the electric charge in a wind turbine blade (1) of according to claim 21 characterized in that the second stage is carried out in a place located at least partially on the internal surface (3) of the blade.
    [23]
    23. Method for dissipating the electrical charge in a wind turbine blade (1) according to any of claims 18, 20, 21 or 22 characterized in that the second stage is carried out by placing a resistive element comprising a resistance in the interval [1 kü, 10 MQ], preferably by placing a resistive element comprising a resistance in the interval [10 kü, 1 MQ].
    [24]
    24. Method for dissipating the electrical charge in a wind turbine blade (1) according to any of claims 17 to 23 characterized in that it further comprises an additional step of electrically connecting a metal strip (12) arranged on the external surface ( 4) of the blade (1), to at least one conductor cable (9).
    [25]
    25. Method for dissipating the electrical charge in a wind turbine blade (1) according to claim 24 characterized in that the additional step comprises a sub-step of electrically connecting the metal strip (12) to at least one third antistatic element (13 ) adjacent to the metal strip (12), and arrange a second paint or sheet or conductive piece (14) between the metal strip (12) and the at least one third antistatic element (13), and the external surface (4) of the blade (1).
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    同族专利:
    公开号 | 公开日
    WO2020148279A1|2020-07-23|
    CN113272549A|2021-08-17|
    EP3874167A1|2021-09-08|
    ES2774169B2|2021-03-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5716193A|1995-07-21|1998-02-10|Eurocopter France|Installation for affording electrical continuity for rotorcraft rotor|
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201900007A|ES2774169B2|2019-01-16|2019-01-16|Electric charge dissipation system for a wind turbine blade, wind turbine blade and related method|ES201900007A| ES2774169B2|2019-01-16|2019-01-16|Electric charge dissipation system for a wind turbine blade, wind turbine blade and related method|
    CN202080009681.1A| CN113272549A|2019-01-16|2020-01-14|Charge dissipation system for wind turbine blades, and related methods|
    PCT/EP2020/050812| WO2020148279A1|2019-01-16|2020-01-14|Electric charge dissipation system for a wind turbine blade, wind turbine blade and related method|
    EP20702218.7A| EP3874167A1|2019-01-16|2020-01-14|Electric charge dissipation system for a wind turbine blade, wind turbine blade and related method|
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