CN219492493U - Plasma lightning protection device for wind driven generator blade - Google Patents
Plasma lightning protection device for wind driven generator blade Download PDFInfo
- Publication number
- CN219492493U CN219492493U CN202222913135.XU CN202222913135U CN219492493U CN 219492493 U CN219492493 U CN 219492493U CN 202222913135 U CN202222913135 U CN 202222913135U CN 219492493 U CN219492493 U CN 219492493U
- Authority
- CN
- China
- Prior art keywords
- polar plate
- lightning protection
- wind turbine
- protection device
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Wind Motors (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The utility model relates to a plasma lightning protection device for wind driven generator blades, which comprises an upper polar plate, a lower polar plate and a dielectric body, wherein the upper polar plate and the lower polar plate are sleeved on the surface of a dielectric body at intervals, and the dielectric body is provided with an installation body for connecting the blades of a wind driven generator set; a plurality of flash receiving parts are arranged on the upper polar plate. In the utility model, the installation body is embedded into the tip of the blade, so that the lightning protection device and the blade are integrated into a whole, the whole is still in the original tip shape of the blade, the aerodynamic requirements are more met on the whole, the whole is light in weight, small in wind resistance and convenient to manufacture, and the damage of heavy current generated by direct lightning to the blade and other electrical equipment can be effectively avoided.
Description
Technical Field
The utility model belongs to the technical field of structural improvement of plasma lightning protection units, and particularly relates to a plasma lightning protection device for a wind driven generator blade.
Background
According to European countries such as Germany, denmark, sweden and the like, the frequency of lightning caused faults is 3.9-8 times per hundred units per year. The direct lightning stroke can damage the blades of the wind driven generator; indirect lightning strokes such as lightning electromagnetic pulse (lightning induction overvoltage) can lead the generator to be,TransformerElectric devices such as convertersApparatus and method for controlling the operation of a deviceAnd electronic systems such as control, communications, SCADA, etc. suffer catastrophic damage; there are also very few reports of lightning damage to hubs, gearboxes, hydraulic systems, yaw systems and drive trains, and mechanical brakes.
The blade of the wind driven generator has a complex geometric structure, the length of the blade exceeds 60m, the blade is made of a reinforced fiber composite material with poor electric conduction, the blade is installed on a high tower with the height of more than 100m and is in a vertical rotation state, so that the blade is extremely easy to be exposed to direct lightning when rotating to a high position, the blade is seriously damaged by direct lightning Lei Shi, and the damaged blade is not easy to repair, wherein a unit arranged on the offshore or in a remote area is extremely difficult to transport materials, and the cost of maintenance personnel is extremely high, so that the loss of income of the wind power plant caused by stopping operation is extremely great, and the lightning damage of the blade is most attractive.
Chinese patent CN201710015530.7 discloses a lightning protection device for moving or fixing objects, in which, in the patent application, a positive plate, a dielectric plate, a negative plate and a conductive needle seat are integrated together, a conductive needle at the upper end of the conductive needle seat is used to attract thundercloud charges, and plasma generated by discharging between the positive plate and the negative plate is used to neutralize thundercloud negative charges and ground positive charges respectively, thereby blocking the down-going channel of the thundercloud, and avoiding damage of direct lightning to the blade of the wind driven generator.
In practical use, the structure of the patent application is found to be slightly complex, and the whole optimization can be further carried out.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a plasma lightning protection device for a wind driven generator blade. In the utility model, the upper polar plate and the lower polar plate are respectively sleeved at the upper end and the lower end of the medium body, and then the installation body arranged at the bottom of the medium plate is embedded into the tip end of the blade, so that the blade and the lightning protection device are integrated into a whole, the aerodynamic requirements are more met as a whole, the whole is light in weight, small in wind resistance and convenient to manufacture, and the damage of high current generated by direct lightning to the blade and other electrical equipment can be effectively avoided.
The technical scheme adopted by the utility model is as follows:
a plasma lightning protection device for wind driven generator blades is characterized in that: the wind turbine generator system comprises an upper polar plate, a lower polar plate and a dielectric body, wherein the upper polar plate and the lower polar plate are sleeved on the surface of a dielectric body at intervals, the dielectric body is provided with an installation body for connecting blades of the wind turbine generator system, and the upper polar plate is provided with a flash connection part.
Further: the medium body is in smooth transition with the outer surface of the blade through the outer surface of the lower polar plate after the medium body is connected with the tip of the blade through the mounting body.
Further: the medium body is in smooth transition with the outer surface of the blade through the outer surface of the medium body after the medium body is connected with the tip of the blade through the mounting body.
Further: the side edges of the two sides of the medium body are gradually arranged in an outward inclined way from top to bottom.
Further: the upper polar plate is a conductive cover which is sleeved at the upper end of the dielectric body, the inner surface of the conductive cover is attached to the outer surface of the upper end of the dielectric body, and the side edges of the two sides of the conductive cover are gradually inclined outwards along with the side edges of the two sides of the dielectric body from top to bottom.
Further: the lower polar plate is a conductive sleeve, the conductive sleeve is sleeved at the lower end of the medium body, the inner surface of the conductive sleeve is attached to the outer surface of the lower end of the medium body, and the side edges of the two sides of the conductive sleeve are gradually inclined outwards along with the side edges of the two sides of the medium body from top to bottom.
Further: the upper polar plate is provided with a plurality of open holes or slots.
Further: the lower electrode plate is provided with a conductive band or wire electrically connected with a terminal provided on the mounting body.
The preferable scheme is as follows: the flash receiving part is a flash receiving needle or a flash receiving bulge.
The preferable scheme is as follows: a plurality of inclined flash receiving rods are arranged on two sides of the upper polar plate;
the preferable scheme is as follows: the top of the upper polar plate is provided with a plurality of approximately vertical flash receiving rods;
the preferable scheme is as follows: the bottom of the upper polar plate is provided with a plurality of convex teeth facing the lower polar plate.
The utility model has the advantages and positive effects that:
in the utility model, an upper polar plate and a lower polar plate are respectively sleeved at the upper end and the lower end of a medium body, the bottom of the medium body is provided with an installation body, and the lower polar plate is electrically connected with a terminal arranged on the installation body through a conductive belt or a conductive wire. During assembly, the installation body is embedded into the tip of the blade, so that the blade and the lightning protection device are integrated, the whole blade is still in the original tip shape of the blade, the aerodynamic requirements are met in the whole, the whole blade is light in weight, small in wind resistance and convenient to manufacture, and the damage of heavy current generated by direct lightning striking to the blade and other electrical equipment can be effectively avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic illustration of FIG. 1 assembled with a blade;
fig. 3 is a schematic view of the lightning receiving portion being convex.
Detailed Description
The utility model will now be further illustrated by reference to the following examples, which are intended to be illustrative, not limiting, and are not intended to limit the scope of the utility model.
As shown in the figure, the plasma lightning protection device for the wind driven generator blade is characterized in that: the wind turbine generator system comprises an upper polar plate 3, a lower polar plate 7 and a medium body 6, wherein the upper polar plate and the lower polar plate are sleeved on the surface of the medium body at intervals, and the medium body is provided with an installation body 8 for connecting blades of the wind turbine generator system. The upper polar plate can be integrally provided with a plurality of flash receiving rods (flash receiving parts) as shown in fig. 1, and the upper polar plate can be integrally provided with a plurality of flash receiving bulges (flash receiving parts) as shown in fig. 3.
The installation body is embedded into the blade tip and is integrated with the blade tip into a whole structure, and the whole body of the medium body and the blade is still in the original tip shape of the blade. The method specifically comprises the following steps: the dielectric body is in smooth transition with the outer surface of the blade through the outer surface of the lower polar plate after the mounting body is connected with the blade tip; or the outer surface of the medium body is in smooth transition with the outer surface of the blade after the medium body is connected with the blade tip through the mounting body. Preferably, the outer surface of the lower polar plate, the outer surface of the upper polar plate and the whole outer surface of the medium between the lower polar plate and the upper polar plate are approximately the shape of the vane designed originally with the outer surface of the vane after the medium body and the vane are assembled.
In order to realize the appearance of the blade in the original design, the side edges of the two sides of the medium body are gradually and outwards inclined from top to bottom and are in smooth transition with the side edges of the blade at the joint.
The upper polar plate is shown in fig. 1 and 2, and is integrally a conductive cover, the conductive cover is sleeved at the upper end of the dielectric body, the inner surface of the conductive cover is adhered to the outer surface of the upper end of the dielectric body, and the side edges of the two sides of the conductive cover are gradually arranged in an outward inclination manner along with the side edges of the two sides of the dielectric body from top to bottom. The lower polar plate is a conductive sleeve, the conductive sleeve is sleeved at the lower end of the medium body, the inner surface of the conductive sleeve is attached to the outer surface of the lower end of the medium body, and the side edges of the two sides of the conductive sleeve are gradually inclined outwards from top to bottom along with the side edges of the two sides of the medium body.
The outline of each structure is approximately as follows: the conductive cover is shaped like a higher mountain (the projection of which is approximately a higher trapezoid) as shown in the figure, and the conductive sleeve is shaped like a lower mountain (the projection of which is approximately a lower trapezoid) which is wider as shown in the figure. The height of the short mountain-shaped conductive sleeve is approximately 20-30mm, and the longitudinal thickness of each part of the bottom edge below in the figure is the same as the longitudinal thickness of the position where the blade 12 below in the figure is aligned.
In order to reduce the weight of the upper electrode plate, as shown in fig. 1, a plurality of openings 4 or slots are provided in the conductive cover body of the upper electrode plate. The lower plate may also be provided with openings or slots to reduce overall weight (not shown). A structure without openings or slots as shown in fig. 2 may also be used.
A plurality of top receiving flash bars 2 are arranged on the top edge of the high trapezoid of the conductive cover, two in the figure; a plurality of side flashbars 1 are respectively arranged on two waists of the high trapezoid, and each side is three in the figure. The heights of the top receiving flash rod and the side receiving flash rod are 20-100mm. In addition, as shown in fig. 3, at least one top connection protrusion 16, one in the figure, may be provided on the top side of the high trapezoid of the conductive shield; a plurality of side flash protrusions 15 are respectively provided on the two waists of the high trapezoid, three on each side in the figure.
The gap between the upper polar plate and the lower polar plate is approximately 25-35mm, a plurality of convex teeth 5 facing the lower polar plate are arranged on the bottom surface of the upper polar plate, the tooth heights of the convex teeth are 5-10mm, the tooth pitches are 5-10mm, and gap discharge is formed between the tips of the convex teeth and the lower polar plate.
The upper polar plate, the flash receiving rod and the lower polar plate are made of corrosion-resistant magnesium-aluminum alloy, so that the upper polar plate, the flash receiving rod and the lower polar plate have enough strength and excellent corrosion resistance in weather such as rain, snow, wind and frost. The upper polar plate and the flash receiving rod can also be made of non-metal materials capable of conducting electricity, so long as the lightning cloud charge can be attracted to the convex teeth for discharging. The dielectric body can be made of the same material as the blade, or can be made of corrosion-resistant nylon, carbon fiber and other materials, the mounting body at the lower end of the dielectric body can be integrally made of the same material, and the mounting body is approximately of a trapezoid structure, the upper end of the mounting body is a short side of the trapezoid, the lower end of the mounting body is a long side of the trapezoid, and two ends of the short side and the long side are respectively connected through a slightly arc-shaped side.
The mounting body is assembled as shown in fig. 2, and the using method is as follows: the wind driven generator blade is manufactured by two halves, firstly, the demolding cloth and the glass fiber cloth are respectively covered on two molds, then the epoxy resin is sucked into the glass fiber cloth by utilizing vacuum negative pressure, and then the whole is solidified and formed by a heating process. The two half blades manufactured respectively are processed, then a dielectric body and a mounting body are arranged at the tips of the two half blades, after gluing, the two half blades are assembled, and after reinforcement, solidification and cooling, the two half blades are lifted.
The relation between the installation body and the blade is as follows: at least one of the left side, the right side, the front side and the rear side of the installation body is attached to the inner wall of the blade, glue is filled between the four sides and the inner wall, and the installation body and the inner wall of the blade are tightly attached together after the glue is solidified, so that the medium body is fixed with the blade, the outer surface of the lower polar plate after the medium body is connected with the tip of the blade through the installation body is in smooth transition with the outer surface of the blade, and the approximately trapezoidal shape of the installation body and the solidified glue can ensure the stability of the combination with the blade.
The lower plate is provided with a conductive strip 9 or wire which is electrically connected to a terminal 10 provided in a recess 11 of the mounting body. The terminals can be connected with the original conductive strips or wires 13 arranged in the blade inner part 14, so that the detection module of the wind driven generator can receive the current at the lower polar plate after the charge neutralization.
When the thundercloud is close to the wind driven generator, the lightning receiving rod rapidly attracts the thundercloud charges and accumulates at the upper polar plate, as the charge quantity is continuously increased, the lower polar plate attracts the ground opposite charges to the lower polar plate through the original conductive belt or conductive wire, as a gap is formed between the upper polar plate and the lower polar plate, the cloud charges form a potential difference at the position, when the voltage value between the gaps reaches a set threshold value, pulse discharge is started, high-concentration plasmas are generated while the charges are consumed, excited state plasmas generated at the periphery act on an atmospheric electric field when the fan operates or stops, and the voltage of the local cloud-to-ground electric field is reduced by the plasmas, so that the local electric field potential is weakened.
The specific charge neutralization principle can be referred to Chinese patent CN201720024082.2 (a lightning protection device for moving or fixed objects), and CN201721413001.4 (equivalent ion resistor Lei Shanyuan, lightning-proof leakage voltage detection device and comprehensive lightning protection system).
Examples
Lightning stroke tests are carried out in a laboratory of a certain wind farm in northwest.
The high-voltage polar plate is pressurized to 45 kilovolts, the length of each blade is 2 meters, three blades are provided, and each blade tip is provided with the structure of the utility model. The blades are in a rotating state.
The current at the conductive line 13 was detected to be at most 10 microamps and the voltage at most 8.7 volts. The blade surface is free from damage and burning problems.
In the utility model, an upper polar plate and a lower polar plate are respectively sleeved at the upper end and the lower end of a dielectric plate, the bottom of a dielectric body is provided with an installation body, and the lower polar plate is electrically connected with a terminal arranged on the installation body through a conductive belt or a conductive wire. During assembly, the installation body is embedded into the tip of the blade, so that the blade and the lightning protection device are integrated, the whole blade is still in the original tip shape of the blade, the aerodynamic requirements are met in the whole, the whole blade is light in weight, small in wind resistance and convenient to manufacture, and the damage of heavy current generated by direct lightning striking to the blade and other electrical equipment can be effectively avoided.
Claims (13)
1. A plasma lightning protection device for wind driven generator blades is characterized in that: the wind turbine generator system comprises an upper polar plate, a lower polar plate and a dielectric body, wherein the upper polar plate and the lower polar plate are sleeved on the surface of a dielectric body at intervals, the dielectric body is provided with an installation body for connecting blades of the wind turbine generator system, and the upper polar plate is provided with a flash connection part.
2. The plasma lightning protection device for a wind turbine blade according to claim 1, wherein: the medium body is in smooth transition with the outer surface of the blade through the outer surface of the lower polar plate after the medium body is connected with the tip of the blade through the mounting body.
3. The plasma lightning protection device for a wind turbine blade according to claim 1, wherein: the medium body is in smooth transition with the outer surface of the blade through the outer surface of the medium body after the medium body is connected with the tip of the blade through the mounting body.
4. A plasma lightning protection device for a wind turbine blade according to claim 1, 2 or 3, wherein: the side edges of the two sides of the medium body are gradually arranged in an outward inclined way from top to bottom.
5. A plasma lightning protection device for a wind turbine blade according to claim 1, 2 or 3, wherein: the upper polar plate is a conductive cover which is sleeved at the upper end of the dielectric body, the inner surface of the conductive cover is attached to the outer surface of the upper end of the dielectric body, and the side edges of the two sides of the conductive cover are gradually inclined outwards along with the side edges of the two sides of the dielectric body from top to bottom.
6. The plasma lightning protection device for a wind turbine blade according to claim 4, wherein: the upper polar plate is a conductive cover which is sleeved at the upper end of the dielectric body, the inner surface of the conductive cover is attached to the outer surface of the upper end of the dielectric body, and the side edges of the two sides of the conductive cover are gradually inclined outwards along with the side edges of the two sides of the dielectric body from top to bottom.
7. The plasma lightning protection device for a wind turbine blade according to claim 5, wherein: the lower polar plate is a conductive sleeve, the conductive sleeve is sleeved at the lower end of the medium body, the inner surface of the conductive sleeve is attached to the outer surface of the lower end of the medium body, and the side edges of the two sides of the conductive sleeve are gradually inclined outwards along with the side edges of the two sides of the medium body from top to bottom.
8. The plasma lightning protection device for a wind turbine blade according to claim 6, wherein: the lower polar plate is a conductive sleeve, the conductive sleeve is sleeved at the lower end of the medium body, the inner surface of the conductive sleeve is attached to the outer surface of the lower end of the medium body, and the side edges of the two sides of the conductive sleeve are gradually inclined outwards along with the side edges of the two sides of the medium body from top to bottom.
9. A plasma lightning protection device for a wind turbine blade according to claim 7 or 8, wherein: the upper polar plate is provided with a plurality of open holes or slots.
10. A plasma lightning protection apparatus for wind turbine blades according to claim 1 or 2 or 3 or 6 or 7 or 8, characterized in that: the lower electrode plate is provided with a conductive band or wire electrically connected with a terminal provided on the mounting body.
11. A plasma lightning protection apparatus for wind turbine blades according to claim 1 or 2 or 3 or 6 or 7 or 8, characterized in that: the flash receiving part is a flash receiving rod or a flash receiving bulge.
12. A plasma lightning protection apparatus for wind turbine blades according to claim 1 or 2 or 3 or 6 or 7 or 8, characterized in that: a plurality of inclined flash receiving rods are arranged on two sides of the upper polar plate; the top of the upper polar plate is provided with a plurality of approximately vertical flash receiving rods.
13. A plasma lightning protection apparatus for wind turbine blades according to claim 1 or 2 or 3 or 6 or 7 or 8, characterized in that: the bottom of the upper polar plate is provided with a plurality of convex teeth facing the lower polar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222913135.XU CN219492493U (en) | 2022-11-03 | 2022-11-03 | Plasma lightning protection device for wind driven generator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222913135.XU CN219492493U (en) | 2022-11-03 | 2022-11-03 | Plasma lightning protection device for wind driven generator blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219492493U true CN219492493U (en) | 2023-08-08 |
Family
ID=87483520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222913135.XU Active CN219492493U (en) | 2022-11-03 | 2022-11-03 | Plasma lightning protection device for wind driven generator blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219492493U (en) |
-
2022
- 2022-11-03 CN CN202222913135.XU patent/CN219492493U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2377485C (en) | Wind turbine blade with a system for deicing and lightning protection | |
| EP2944809B1 (en) | Method of manufacturing a wind turbine blade | |
| US8834117B2 (en) | Integrated lightning receptor system and trailing edge noise reducer for a wind turbine rotor blade | |
| US20090246025A1 (en) | Wind turbine protection | |
| EP2019204A1 (en) | Wind turbine protection | |
| US20130272892A1 (en) | Noise reducer for rotor blade in wind turbine | |
| CN102661240A (en) | Wind wheel vane anti-lightning device for wind generating set and mounting method thereof | |
| US4494009A (en) | Method and apparatus for capturing an electrical potential generated by a moving air mass | |
| WO2018095660A1 (en) | Lightning receptor for a rotor blade of a wind turbine | |
| CN106321372A (en) | Composite carbon fiber heating element for wind-driven generator blade ice preventing or ice melting | |
| CN219492493U (en) | Plasma lightning protection device for wind driven generator blade | |
| JP4199020B2 (en) | Wind turbine blade | |
| CN206429354U (en) | A kind of blade lightning protection device of wind-driven generator | |
| WO2021180389A1 (en) | Wind turbine blade assembly and method for manufacturing | |
| CN214533388U (en) | Lightning current restraining device for wind driven generator blade and mounting structure thereof | |
| CN219492494U (en) | Wind-powered electricity generation blade lightning protection device mounting structure | |
| CN209818222U (en) | Wind generating set's anti-thunder type blade that prevents frostbite | |
| CN111734578B (en) | Megawatt wind turbine blade, assembling method and manufacturing method thereof, and manufacturing method of blade tip | |
| CN219513768U (en) | Push rod type assembly structure of lightning protection device at tip of blade of wind driven generator | |
| CN209788283U (en) | Bird damage prevention insulator | |
| CN202914253U (en) | Wind power blade with lightning-current-limiting function | |
| DE102008002961A1 (en) | Lightning protection system for a rotor blade of a wind power station comprises a conducting lightning receptor for mounting on the rotor blade surface so that part of the lightning receptor protrudes beyond the flow edge of the rotor blade | |
| CN220168082U (en) | Sectional lightning protection structure for wind power blade | |
| CN219795461U (en) | Wind-powered electricity generation is lightning protection deicing subassembly for blade | |
| CN112628093A (en) | Lightning current restraining device for wind driven generator blade and mounting structure thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |