CN110332081A - A kind of wind electricity blade lightning protection structure and wind electricity blade - Google Patents
A kind of wind electricity blade lightning protection structure and wind electricity blade Download PDFInfo
- Publication number
- CN110332081A CN110332081A CN201910615102.7A CN201910615102A CN110332081A CN 110332081 A CN110332081 A CN 110332081A CN 201910615102 A CN201910615102 A CN 201910615102A CN 110332081 A CN110332081 A CN 110332081A
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- Prior art keywords
- blade
- wind electricity
- metal
- lightning protection
- protection structure
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- 230000005611 electricity Effects 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 90
- 229910052751 metal Inorganic materials 0.000 claims abstract description 90
- 239000000523 sample Substances 0.000 claims abstract description 61
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 238000005243 fluidization Methods 0.000 abstract description 7
- 230000001939 inductive effect Effects 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- -1 connecting wire Substances 0.000 abstract description 2
- 208000025274 Lightning injury Diseases 0.000 description 14
- 230000005684 electric field Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000035508 accumulation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- 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
-
- 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
- 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)
Abstract
Wind electricity blade lightning protection structure and wind electricity blade provided by the invention, belong to wind power generation unit blade lightning Protection technical field, and wherein wind electricity blade lightning protection structure includes: metal blade tip, and the tip of blade is arranged in, and are electrically connected with the ground lead in blade；Metal probe is spaced apart and arranged on blade with the holding of metal blade tip, and is electrically connected by connecting wire with metal blade tip.Wind electricity blade lightning protection structure of the invention, discharge path is formed by metal probe, connecting wire, metal blade tip, ground lead, in the case where being struck by lightning descending leader forceful electric power field action, closer to the metal probe of thunder and lightning, compared with ground lead can more maximum probability starting upward leader, with descending leader formed discharge path.Fluidization tower electric discharge is formed to significantly reduce the charge inducing around ground lead, is further formed upward leader breakdown blade, it being capable of safety of the effective protection blade under the environment that is struck by lightning.
Description
Technical field
The present invention relates to wind power generation unit blade lightning Protection technical fields, and in particular to a kind of wind electricity blade lightning protection structure and
Wind electricity blade.
Background technique
With the rapid development of economy, demand of the people to electric energy is continuously increased, the capacity and wind-power electricity generation of Wind turbines
Scale also therewith constantly expand.Due to the towering protrusion of the body construction of Wind turbines, it is frequently located in wilderness or mountain area area, thunder
It hits, is one of the principal element for influencing safe operation of wind turbine, wherein blade is to be easiest in entire generating set by thunder
The component hit.Therefore, the lightning Protection of wind power generation unit blade has become the critical issue for restricting Wind turbines reliability service.
Chinese patent literature CN102869882A discloses a kind of wind turbine blade with lightning protection system, packet
Include blade tip, the arrester that blade tip is disposed about, the ground lead inside penetrating blade；When being struck by lightning, thunder-strike current passes through
Arrester, which is transmitted to ground lead and is ultimately conducted to the earth, realizes discharge path.
For above-mentioned blade construction when being struck by lightning, ground lead has one under the induction of lightning stroke descending leader strong electrical field
Determine probability and generate charge inducing around lead, charge collection will form fluidization tower electric discharge.Be gathered in charge on ground lead into
One step forms upward leader, discharge path is formed with lightning stroke descending leader, since ground lead is located at blade interior, to be formed
The discharge path that is formed with lightning stroke descending leader of fluidization tower electric discharge, be easy breakdown blade, a large amount of high temperature lightning stroke electric arcs incorporate breakdown
Position is easy to cause blade lightning damage.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming wind electricity blade in the prior art, when being struck by lightning,
For ground lead under the induction of lightning stroke descending leader electric field, surrounding is easy a large amount of charges of aggregation, and a large amount of charges of aggregation have one
Determine probability and form fluidization tower electric discharge, be further formed upward leader, then punctures blade and lightning stroke descending leader forms discharge path,
The defect for causing blade lightning damage rate high, thus provide it is a kind of can effectively avoid originating upward leader on ground lead, drop
The wind electricity blade lightning protection structure of the lightning damage rate of low blades.
The present invention also provides a kind of wind electricity blades with above-mentioned lightning protection structure.
In order to solve the above technical problem, the present invention provides wind electricity blade lightning protection structures, comprising:
The tip of blade is arranged in metal blade tip, is electrically connected with the ground lead in the blade；
Metal probe is spaced apart and arranged on the blade with metal blade tip holding, and passes through connecting wire and institute
State the electrical connection of metal blade tip.
Preferably, the metal probe has multiple, and sets gradually along the connecting wire.
Preferably, the metal probe, which is arranged in, is located at 1/10 length of blade close to blade tip on the blade
Position.
Preferably, multiple metal probes are evenly arranged in the connecting wire.
Preferably, the metal probe is structure as a whole with the connecting wire.
Preferably, the connecting wire is adjacent in the outer surface of the blade.
Preferably, the metal probe is vertically arranged on the blade, the close blade of metal probe
One end be electrically connected with the connecting wire.
Wind electricity blade provided by the invention, including lightning protection structure described in any one of above scheme.
Preferably, the wind electricity blade, further includes:
Arrester is electrically connected on the outer surface of the blade, and with the ground lead.
Preferably, the posterior border position of blade is arranged in the metal probe of the lightning protection structure.
Technical solution of the present invention has the advantages that
1. wind electricity blade lightning protection structure provided by the invention, including the metal blade tip of blade tip is arranged in and is arranged in leaf
The metal probe of on piece, wherein metal blade tip is electrically connected with the ground lead in blade, between metal probe and the holding of metal blade tip
Gauge is electrically connected from setting, and by connecting wire with metal blade tip；Metal probe, connecting wire, metal blade tip, ground connection in this way
Lead forms discharge path, under the descending leader forceful electric power field action that is struck by lightning, closer to the metal probe of thunder and lightning, compared with ground lead
The starting upward leader of meeting more maximum probability forms discharge path with descending leader.To significantly reduce around ground lead
Charge inducing formed fluidization tower electric discharge, be further formed upward leader breakdown blade, can effective protection blade lightning stroke environment
Under safety.
2. wind electricity blade lightning protection structure provided by the invention, metal probe has multiple, and sets gradually along connecting wire,
Multiple metal probe collective effects are conducive to the lightning Protection ability for improving blade.
3. wind electricity blade lightning protection structure provided by the invention, metal probe, which is arranged on blade, is located at 1/10 close to blade tip
The position of length of blade can reduce the time of thunder-strike current conduction, be transmitted to it rapidly at metal blade tip.
4. wind electricity blade lightning protection structure provided by the invention, multiple metal probes are evenly arranged in the connecting wire,
Be conducive to thunder-strike current sequence and shunt conduction, accumulation phenomenon is effectively reduced.
5. wind electricity blade lightning protection structure provided by the invention, metal probe are structure as a whole with connecting wire, be conducive to thunder
It hits electric current and is conducted rapidly through connecting conductor.
6. wind electricity blade lightning protection structure provided by the invention, connecting wire is adjacent in the outer surface of the blade, can be made
Metal probe forms bare electrode in blade outer surface.
7. wind electricity blade lightning protection structure provided by the invention, metal probe are vertically set on blade, metal probe is leaned on
One end of nearly blade is electrically connected with the connecting wire, is only had the top of metal probe to receive lightning stroke effect in this way, is avoided being struck by lightning
It is breakdown to eventually lead to blade to avoid influencing the conduction of thunder-strike current for damage of the electric current to metal probe itself.
8. wind electricity blade provided by the invention, as with lightning protection structure described in any one of above scheme, tool
Have the advantages that described in any one of above scheme.
9. wind electricity blade provided by the invention, further includes: the arrester on blade outer surface, and it is electric with ground lead
Metal blade tip is together in series by connection, such ground lead with arrester, forms a complete discharge path, and thunder and lightning occurs
When, lightning stroke attachment point can hit arrester, and a large amount of thunder-strike currents can pass to ground lead by arrester and import the earth.
10. the posterior border position of blade is arranged in the metal probe of wind electricity blade provided by the invention, lightning protection structure, will not break
The aeroperformance of bad blade hits other positions on blade to reduce thunder and lightning by the way that thunder and lightning is gathered blade trailing edge
Wear damage.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is wind electricity blade schematic perspective view of the invention；
Fig. 2 is the enlarged diagram of leaf tip in Fig. 1；
Fig. 3 is the main view of connecting wire and metal probe.
Description of symbols:
1, blade；2, connecting wire；3, metal probe；4, metal blade tip；5, arrester；6, ground lead.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
As shown in Figure 1 and Figure 2, the present embodiment provides a kind of wind electricity blades, have lightning protection structure, and the lightning protection structure includes
The metal blade tip 4 of blade tip is set and connects the connecting wire 2 and metal probe 3 of metal blade tip.The metal blade tip 4
The tip of blade 1 is set, and is electrically connected with the ground lead 6 inside blade 1, thunder-strike current is allow to pass through metal blade tip 4
It is transmitted to ground lead 6, to be transmitted to the earth.
On the covering for the outer surface that the connecting wire 2 is tightly attached to blade 1 close to leaf tip, and it is electrically connected with metal blade tip 4
It connects, the connecting wire 2 extends from the direction for being positioned against root of blade of metal blade tip 4.
The setting of metal probe 3 is electrically connected in connecting wire 2, and with connecting wire 2, and metal probe 3 has more,
It is uniformly distributed in connecting wire 2, and perpendicular to the outer surface of blade 1.Metal probe is arranged vertically, and free end is exposed
Electrode can make the contacting with thunder and lightning earlier of metal probe 3, thus conduct thunder and lightning towards metal blade tip 4 by metal probe 3,
Make under the induction of lightning stroke descending leader electric field, a large amount of accumulations are near metal probe 3, to substantially reduce upward leader
When circuit pass through blade, reduce the lightning damage rate of blade.
Connecting wire 2 is structure as a whole with metal probe 3, and the position of connecting wire 2 and metal probe 3 is located at close to blade tip
1/10 length of blade at, and be located at blade posterior border position, to will not influence the aeroperformance of blade.By the way that thunder and lightning is gathered
Collect blade trailing edge, thunder and lightning can be reduced, the breakdown at other positions on blade is damaged.
The metal probe 3, connecting wire 2, metal blade tip 4 and ground lead 6 of the present embodiment are sequentially communicated the electric discharge of composition
Circuit, when thunder and lightning and metal probe 3 contact, thunder and lightning is rapidly transferred to metal blade tip 4 by connecting wire 2 by metal probe 3,
Under the induction of lightning stroke descending leader strong electrical field, 3 surrounding of metal probe can have charge inducing, and charge collection will form fluidization tower and put
Electricity further will form upward leader, so that thunder and lightning be made at most only to have damaged metal probe 3；Make charge collection by connecing in this way
It has been transferred to around ground lead 6 around metal probe 3, the upward leader loop breakdown blade for avoiding charge collection from generating.
As shown in figure 3, metal probe 3 is evenly arranged in connecting wire 2, the size of metal probe can be set as: diameter
4mm is highly 50mm, spacing 500mm；The size of connecting wire 2 can be set as: diameter 4mm, and length is the 1/ of blade radius
10.In addition, metal probe and 2 form of connecting wire and size can also be that other conventionally forms and size, other sizes exist
In the protection scope of this patent.
As shown in Figure 1 and Figure 2, the lightning protection structure of the present embodiment wind electricity blade, can also include: arrester 5, and arrester 5 is set
Another electric discharge on the outer surface of the blade 1 at metal blade tip 4, with the composition of ground lead 6 inside wind electricity blade
Access；When thunder and lightning occurs, after thunder and lightning hits arrester, a large amount of thunder-strike currents can pass to ground lead importing by arrester
Greatly.The lightning protection structure of wind electricity blade provided in this embodiment, due to not conflicting with other facilities of existing installation blade, because
This can carry out lightning stroke transformation for existing installation wind electricity blade, and installation is simple and convenient.
Working principle:
Metal probe 3, connecting wire 2, metal blade tip 4 and ground lead 6 form a discharge path, and process is: in thunder
When electricity occurs, lightning stroke attachment point can hit metal probe 3 first, be transmitted to thunder-strike current through connecting wire 2 by metal probe 3
On metal blade tip 4, then by metal blade tip 4 by the grounded lead 6 of thunder-strike current be transmitted to the earth, formed discharge path.It is thunder above
An ideal circuit of current discharge is hit, actual conditions are that metal probe 3- is under the induction of lightning stroke descending leader strong electrical field, gold
Charge inducing can be had by belonging to 3 surrounding of probe, and charge collection will form fluidization tower electric discharge, further will form upward leader, thus thunder
Electricity at most only damages metal probe；Make charge collection by being transferred to around metal probe 3 around ground lead 6 in this way,
Reduce the probability for the upward leader loop breakdown blade that charge collection generates.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. wind electricity blade lightning protection structure characterized by comprising
Metal blade tip (4) is arranged in the tip of blade (1), is electrically connected with the ground lead (6) in the blade (1)；
Metal probe (3) keeps being spaced apart and arranged on the blade (1), and passes through connecting wire with the metal blade tip (4)
(2) it is electrically connected with the metal blade tip (4).
2. wind electricity blade lightning protection structure according to claim 1, which is characterized in that the metal probe (3) have it is multiple,
And it is set gradually along the connecting wire (2).
3. wind electricity blade lightning protection structure according to claim 2, which is characterized in that the metal probe (3) is arranged in institute
State the position for being located at 1/10 length of blade close to blade tip on blade (1).
4. wind electricity blade lightning protection structure according to claim 2, which is characterized in that multiple metal probes (3) are in institute
It states and is evenly arranged on connecting wire (2).
5. wind electricity blade lightning protection structure according to claim 4, which is characterized in that the metal probe (3) and the company
Conducting wire (2) is connect to be structure as a whole.
6. wind electricity blade lightning protection structure according to any one of claims 1 to 5, which is characterized in that the connecting wire
(2) it is adjacent to the outer surface in the blade (1).
7. wind electricity blade lightning protection structure according to claim 6, which is characterized in that the metal probe (3) is in the leaf
Piece is vertically arranged on (1), and one end close to the blade (1) of metal probe (3) is electrically connected with the connecting wire (2).
8. wind electricity blade, which is characterized in that have lightning protection structure according to any one of claims 1 to 7.
9. wind electricity blade according to claim 8, which is characterized in that further include:
Arrester (5) is set on the outer surface of the blade (1), and is electrically connected with the ground lead (6).
10. wind electricity blade according to claim 8, which is characterized in that metal probe (3) setting of the lightning protection structure exists
The posterior border position of the blade (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615102.7A CN110332081A (en) | 2019-07-09 | 2019-07-09 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615102.7A CN110332081A (en) | 2019-07-09 | 2019-07-09 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110332081A true CN110332081A (en) | 2019-10-15 |
Family
ID=68144838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910615102.7A Pending CN110332081A (en) | 2019-07-09 | 2019-07-09 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN110332081A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526191A (en) * | 2022-03-07 | 2022-05-24 | 华能河南清洁能源有限公司 | Surface protection method and protection structure of wind power blade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206458568U (en) * | 2017-01-16 | 2017-09-01 | 张瑞佳 | Fan blade lightning protection device with metal blade tip |
| CN107288829A (en) * | 2017-08-05 | 2017-10-24 | 中国科学院工程热物理研究所 | A kind of pneumatic equipment bladess lightning receptor design method |
| CN108150365A (en) * | 2018-01-02 | 2018-06-12 | 中国电力科学研究院有限公司 | Lightning protection connects sudden strain of a muscle device |
| WO2018206158A1 (en) * | 2017-05-09 | 2018-11-15 | Siemens Wind Power A/S | Lightning protection system for a wind turbine blade |
| CN210317620U (en) * | 2019-07-09 | 2020-04-14 | 中国华电科工集团有限公司 | Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade |
-
2019
- 2019-07-09 CN CN201910615102.7A patent/CN110332081A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206458568U (en) * | 2017-01-16 | 2017-09-01 | 张瑞佳 | Fan blade lightning protection device with metal blade tip |
| WO2018206158A1 (en) * | 2017-05-09 | 2018-11-15 | Siemens Wind Power A/S | Lightning protection system for a wind turbine blade |
| CN107288829A (en) * | 2017-08-05 | 2017-10-24 | 中国科学院工程热物理研究所 | A kind of pneumatic equipment bladess lightning receptor design method |
| CN108150365A (en) * | 2018-01-02 | 2018-06-12 | 中国电力科学研究院有限公司 | Lightning protection connects sudden strain of a muscle device |
| CN210317620U (en) * | 2019-07-09 | 2020-04-14 | 中国华电科工集团有限公司 | Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526191A (en) * | 2022-03-07 | 2022-05-24 | 华能河南清洁能源有限公司 | Surface protection method and protection structure of wind power blade |
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