CN107288829A - A kind of pneumatic equipment bladess lightning receptor design method - Google Patents
A kind of pneumatic equipment bladess lightning receptor design method Download PDFInfo
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- CN107288829A CN107288829A CN201710663166.5A CN201710663166A CN107288829A CN 107288829 A CN107288829 A CN 107288829A CN 201710663166 A CN201710663166 A CN 201710663166A CN 107288829 A CN107288829 A CN 107288829A
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- arrester
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- lightning
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Classifications
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- 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
Abstract
The invention discloses the design method that a kind of pneumatic equipment bladess thunder and lightning connects sudden strain of a muscle system, the blade arrester system integrated with cylindric arrester by designing metal blade tip, metal trailing edge, it is possible to achieve effectively connects sudden strain of a muscle to blade thunder-strike current.There is provided design method is provided, meet to thunder and lightning effectively connect sudden strain of a muscle effect simultaneously, also ensure connect sudden strain of a muscle system to blade aerodynamic, structural behaviour influence in allowed band.
Description
Technical field
Sudden strain of a muscle is connect the present invention relates to machinery industry technical field of wind power generation, more particularly to a kind of horizontal shaft wind-power blade thunder and lightning
The structural shape and its design method of device system, this method construct one kind and connect sudden strain of a muscle comprising metal blade tip, metal trailing edge and column
The blade arrester system and its design method of device integration, it is possible to achieve sudden strain of a muscle effectively is connect to blade thunder-strike current.
Background technology
Wind electricity blade lightning damage problem is an important content of interest in wind electricity blade design, manufacture, operation.Wind
Group of motors is run in the field environment, and modern wind turbine blade dimensions are increasingly longer, blade pylon also more and more higher.Blade by
The probability destroyed that is struck by lightning is also increasing.Although existing large scale wind unit is all designed with lightning-protection system, blade lightning strike accident
Still happen occasionally.Carry out new effective blade lightning-protection system and part research and design, be accompanied by blade maximization hair
The problem of opening up, and pay close attention to all the time.
For the investigation of existing thunderbolt case, the major reason that lightning damage occurs, is that thunder and lightning exists when being struck by lightning
The lightning strike spot of blade is not hit on arrester, but hits the other positions in blade, so that lightning current is not
Effectively by arrester system introducing underground, but puncture blade construction, cause blade damage.
In addition, installing arrester system on wind electricity blade, inevitably Blade Properties are impacted.Blade
Aeroperformance and structural behaviour can mainly be included, aeroperformance is mainly relevant with blade profile structure, and in terms of structural behaviour then
In terms of considering the strength character under blade ultimate load, the fatigue life under fatigue load and structural modal frequency.
Arrester system and the design method of part are also required to pay attention to these aspects.
The content of the invention
(1) technical problem to be solved
For current pneumatic equipment bladess, exist because when being struck by lightning, thunder and lightning does not hit arrester but hits leaf
The other positions of piece, so as to cause blade injury to destroy this problem.By analyzing thunderbolt under a situation arises, blade surrounding electric field feelings
Condition, and influence research of the blade rotation to surrounding electric field, and analysis is investigated to existing blade thunder and lightning destruction case, explore
When blade thunderbolt occurs, the distribution situation of thunder and lightning drop point on blade, so as to propose the blade arrester structure being adapted therewith
Form so that when thunder and lightning occurs, arrester, which is realized, effectively connects sudden strain of a muscle, and induce current into underground, to reduce to blade and machine
The destruction of group；In addition, the present invention also starts with from electric conductivity with arrester to the influence angle of blade aerodynamic, structural behaviour, carry
Go out the design method of the type arrester.
(2) technical scheme
The present invention be realize technical scheme that its technical purpose used for：
A kind of pneumatic equipment bladess thunder and lightning connects sudden strain of a muscle design method, it is characterised in that methods described at least includes following step
Suddenly：
SS1. according to supporting target blade model and physical dimension, set up thunder and lightning and connect sudden strain of a muscle system initial model, it is described
Thunder and lightning, which connects sudden strain of a muscle system, includes metallic receptor, lower lead and metal connecting piece, wherein, the metallic receptor at least includes gold
Belong to blade tip, metal tail rim segment and several described cylinder arresters, and the metal blade tip, metal tail rim segment and several circles
Post arrester is integrally formed part, and several described cylinder arrester arranged for interval are pacified in the inner side of the metal tail rim segment
Fill in section, when the lightning receptor system is in installment state, the metal blade tip is arranged in the tip of blade, the gold
Category trailing edge section is formed as the blade trailing edge of blade tip part, and the end face of the cylinder arrester is concordant with blade surface and is in
Naked state, the lower lead and metal connecting piece are arranged in the cavity of blade；
SS2. according to electric conductivity demand, each spot size that sudden strain of a muscle system is connect to the thunder and lightning is tentatively estimated；
SS3. each spot size of sudden strain of a muscle system is connect according to the step SS2 thunders and lightnings for tentatively estimating determination, with reference to wanted supporting
Target blade construction parameter, sets up and connects sudden strain of a muscle system and the intact leaf finite element structure mould including blade other structures comprising thunder and lightning
Type；
SS4. the target blade ultimate load provided according to blade manufacturer, the blade finite element set up to step SS3
Structural model is analyzed, calculate thunder and lightning connect each position of sudden strain of a muscle system strength stress distribution, while calculate thunder and lightning connect sudden strain of a muscle system with
The intensity distribution of the other position attachment structures of blade, and calculate due to being mounted with that thunder and lightning connects sudden strain of a muscle system, be affected by it, blade its
The intensity distribution situation at his position；
SS5. the blade finite element structure model set up according to step SS3, calculating is mounted with that the thunder and lightning is connect after sudden strain of a muscle system,
The intrinsic frequency of blade and the response vibration shape；
SS6. the blade finite element structure model set up using step SS3, it is tired according to the blade that blade manufacturer is provided
Labor load, calculates arrester and arrester and is connected with blade other parts the fatigue stress situation at position, and with it is selected
Metal Material Fatigue performance parameter contrast, calculate the fatigue damage situation of arrester and connecting portion, and calculate
Be mounted with after arrester, other positions of blade be affected by it after fatigue stress distribution situation and fatigue damage distribution situation.
SS7. the blade Integral modes according to the intensive analysis to arrester under ultimate load and blade, comprising arrester divide
Analysis, every analysis result such as analysis of fatigue of arrester and blade under fatigue load, inspection is mounted with after arrester, arrester with
Whether blade meets safe design requirement in structural strength, vibration characteristics, fatigue properties, does not meet such as, and arrester structure is joined
Number is adjusted, and repeats above-mentioned work, until meeting.
In parameter tuning process, the requirement that arrester dimensional parameters meet electric conductivity all the time need to be met, i.e., is accorded with all the time
The size requirement gone out given in SS1 should be not less than by closing each part dimension.
The pneumatic equipment bladess lightning receptor systems and its design method of the present invention, its principle and method are：
Wind electricity blade, when running to blade tip vertically upward, is more likely formed thunder in rotating operation between blade and thundercloud
Electric guide occurs, and with the progressively development of lightning leader, the electromagnetic field near blade progressively strengthens, but because blade is in rotation
During, the electromagnetic field situation near blade can also rotate and change with blade, when this results in last thunderbolt generation, thunder
Drop point of the electricity on blade not necessarily can be also on blade tip position, it is more likely that can be fallen in blade close to blade tip certain distance model
On the trailing edge position enclosed.And existing blade is struck by lightning by largely and destroys the investigation of case, also demonstrate this point.
However, in existing blade lightning-protection system, designed blade connects sudden strain of a muscle system, mainly by metal blade tip and in blade
A series of arresters composition that upper distribution is set.When above-mentioned situation occurs, thunder and lightning, which is hit, would be possible to fall a little in metal leaf
On sharp and other arresters.Because blade is not good insulating body in itself, now, outside electric field and blade construction, especially
It is to would be possible to lightning current between the conductive material of blade interior, so as to cause lightning current to penetrate blade, causes leaf
Piece is destroyed.
By design metal blade tip, metal trailing edge, cylinder arrester integration connect sudden strain of a muscle system, it is possible to effectively improve leaf
To the generation for connecing sudden strain of a muscle rate, reducing broken by lightning of thunder and lightning under piece rotation status.
This connects the design of sudden strain of a muscle system, be thunder and lightning more than the blade hit probability on a large scale of overriding concern.According to existing thunder
A situation arises for electricity, and current international existing blade lightning protection subregion is to extend blade to 4 regions are divided into, can be receptible
It is expected that intensity of lightning current is larger, and it is 0-5 meters away from blade tip scopes to occur the higher region of lightning strike probability.Therefore this patent metal
The size range of trailing edge, is also configured as since blade tip, to 5 meters away from blade tip positions.
Secondly, what is considered is that thunder and lightning is hit after arrester, if lightning current effectively can be imported into the earth.This side
Face can calculate its physical dimension according to the conductive capability of different metal material, and different metal conductive capability has corresponding specification can
To refer to.
After the arrester system of the increase present invention, the aerodynamic configuration of blade does not change, therefore, to pneumatic
The influence of performance can not considered.
After the arrester system of the increase present invention, to characteristics such as the weight of blade construction, intensity, fatigue, vibrations all
It can have a certain impact, accordingly, it would be desirable to pay attention in the design.
Therefore detailed design to the arrester system, mainly enters in terms of conductometric analysis and Structural Performance Analysis two
OK.
First, conductometric analysis
According to electric conductivity, it can be achieved to estimate the size of the arrester.
Wherein, the profile of metal blade tip and the aerodynamic configuration of blade are consistent.Outside the profile and blade aerodynamic of metal trailing edge
Shape is consistent, according to existing blade lightning protection subregion, and blade is extended to being divided into 4 regions, can receptible expected lightning current it is strong
Degree is larger, and it is 0-5 meters away from blade tip scopes to occur the higher region of lightning strike probability.Therefore the size range of metal trailing edge,
It is designed as since blade tip, to 5 meters away from blade tip positions.
According to conductive capability, arrester physical dimension includes metal tip surface product, the width of metal trailing edge and thickness, circle
The quantity and body diameter of post arrester, the diameter of lower guide line.According to the related specifications of International Electrotechnical Commission, IEC TR
Requirement is provided to minimum dimension of the metal material used in lightning strike protection system in terms of lightning current conduction is ensured in 61400-24.According to
This specification, can be determined to the size at each position of arrester.The arrester system unit size range is can determine that accordingly
Lower limit.
2nd, Structural Performance Analysis：
After electric conductivity design is met, that to be carried out is mainly designed to guarantee arrester system and the structure of blade
Mechanical property, while ensureing leaf weight in rational scope.
Need to be analyzed respectively in terms of Strength co-mputation, mode assessment, fatigue damage respectively.
Complete structural finite element model is initially set up, calculates under blade limit aerodynamic loading and inertial load, connects sudden strain of a muscle
The stressing conditions of device, and metallic receptor and the stressing conditions of blade composite connecting portion.
Using the model, the intrinsic frequency and the vibration shape of blade are calculated, whether judge meets rational
Fatigue load is applied to the model, stress variation situation of the arrester under fatigue load is calculated, according to selected
Metal material Fatigue Property Curve, assess its fatigue behaviour.
Arrester metal blade tip size, metal tail edge thickness, metal trailing edge are connect into sudden strain of a muscle in blade chordwise direction width, cylinder
These parameters of device diameter carry out many wheel iterative analysis, can obtain and meet above-mentioned every mechanical property, while right as variable
Leaf weight influences less structural parameters.
It is preferred that, Strength co-mputation under the ultimate load, including to metal blade tip, metal trailing edge, round metal in arrester
The stress distribution of post is calculated, and blade composite structure is calculated with the stress distribution at arrester connecting portion, in addition, also
The stress distribution that the other positions of blade body need to be calculated is calculated.
It is preferred that, the modal calculation, after referring to that the other positions of blade are connected with arrester, integrally-built mode meter
Calculate.
It is preferred that, fatigue strength and Calculation of Fatigue Life under the fatigue load, including to metal blade tip, gold in arrester
Belong to trailing edge, the fatigue stress distribution of metal column is calculated and Calculation of Fatigue Life, and the other positions of blade and arrester connecting portion
Fatigue stress distribution at position is calculated and Calculation of Fatigue Life, also needs to calculate the fatigue stress distribution meter at the other positions of blade body
Calculate and Calculation of Fatigue Life.
It is preferred that, to arrester and blade strength, mode, fatigue behaviour assessment, be according to carrying out according to following.Connect
The intensity and fatigue behaviour for dodging device are estimated really according to parameters such as working strength, the fatigue lives of selected metal material
Fixed, the intensity of blade (including blade and arrester connecting portion), mode, fatigue behaviour assessment are according to the related industry of blade
The requirement of specification is estimated.
(3) beneficial effect
Compared with existing blade arrester system, blade lightning receptor system of the invention can be more suitable for blade
Under rotation status, effect is drawn to connecing for thunder and lightning, that is, improves blade and the thunder and lightning of unit connects sudden strain of a muscle rate, so as to reduce blade and unit
Thunderbolt destruction, improve the service life of blade and unit.
Brief description of the drawings
Fig. 1 is that thunder and lightning connects sudden strain of a muscle system schematic.
Fig. 2 is that thunder and lightning connects sudden strain of a muscle system lateral schematic diagram.
Fig. 3 is that thunder and lightning connects schematic diagram of the sudden strain of a muscle system after blade.
Fig. 4 is that thunder and lightning connects side schematic view of the sudden strain of a muscle system after blade.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, to this hair
It is bright to be further described.
In the present embodiment, by taking the MW level pneumatic equipment bladess of current main-stream as an example, carry out thunder and lightning using following steps and meet sudden strain of a muscle system
The design of system：
1) according to supporting target blade model and physical dimension, lightning receptor system initial model, thunder and lightning are set up
The initial model of arrester system includes metal blade tip 1, metal tail rim segment 3, multiple cylinder arresters 4, lower lead 5 and metal
Connector 6, as shown in Figure 1, 2.In the present embodiment, wherein metal blade tip 1, metal tail rim segment 3, cylinder arrester 4, lower lead
5th, metal connecting piece 6 uses aluminium.Wherein metal blade tip 1, metal tail rim segment 3, cylinder arrester 4 are integral metal and connect sudden strain of a muscle
Device part.As shown in Figure 3,4, when lightning receptor system is in installment state, the arranged for interval of cylinder arrester 4 is in metal tail
On the inner side construction section of rim segment 3, metal blade tip 1 is arranged in the tip of blade 7, metal by the metal blade tip afterbody 2 of its bottom
Trailing edge section 3 is formed as the blade trailing edge of the tip segment of blade 7, two end faces of cylinder arrester 4 and the flush with outer surface of blade 7
And in naked state, lower lead 5 and metal connecting piece 6 are arranged in the cavity of blade 7.
2) according to electric conductivity demand, the size to the system is tentatively estimated.Wherein, the profile and leaf of metal blade tip
The aerodynamic configuration of piece is consistent.The profile of metal trailing edge is consistent with blade aerodynamic profile, according to existing blade lightning protection subregion, hair
The higher region of raw lightning strike probability is 0-5 meters away from blade tip scopes.Therefore the size range of metal trailing edge, is designed as opening from blade tip
Begin, to 5 meters away from blade tip positions.
Secondly, it is necessary to primarily determine that arrester physical dimension includes metal tip surface product, the width of metal trailing edge, cylinder
The quantity and body diameter of arrester, the diameter of lower guide line.According to the related specifications of International Electrotechnical Commission, IEC TR
Requirement is provided to the minimum dimension of lightning strike protection system material in 61400-24.Specification accordingly, to the size at each position of arrester
Determined.In this example, included according to the size that materials conductive ability is determined, the length dimension of aluminium blade tip ensures metal blade tip table
Area is not less than 900mm2, the minimum sectional area of metal trailing edge is 70mm2, totally 3 pairs of cylinder arrester, each a diameter of 30mm, under
Pin cross section product is 70mm2, metal connecting piece cross section product is 200mm2.According to above procedure, the arrester Account Dept is determined
The lower limit of part size range.
3) each spot size of the arrester according to determined by previous step, with reference to wanted supporting blade construction parameter, sets up
Intact leaf finite element structure model comprising arrester system Yu blade other structures；
4) the blade ultimate load provided according to blade manufacturer, is analyzed above-mentioned model, calculates each portion of arrester
The strength stress distribution of part, while calculating arrester and the intensity distribution of the other position attachment structures of blade.Also need calculate due to
The arrester is mounted with, is affected by it, the intensity distribution situation at other positions of blade.
5) above-mentioned FEM model is still utilized, calculating is contained after the arrester system, the intrinsic frequency and sound of blade
Answer the vibration shape.
6) equally, using above-mentioned model, the blade fatigue load provided according to blade manufacturer calculates arrester and connect
Dodge the fatigue stress situation that device and blade other parts think connecting portion, and with selected Metal Material Fatigue performance parameter phase
Control, calculates the fatigue damage situation of arrester and connecting portion.In addition, also need calculating to be mounted with after arrester, blade
Other positions be affected by it after fatigue stress distribution situation and fatigue damage distribution situation.
7) the blade Integral modes point according to the intensive analysis to arrester under ultimate load and blade, comprising arrester
Analysis, every analysis result such as analysis of fatigue of arrester and blade under fatigue load, inspection is mounted with after arrester, arrester with
Whether blade meets safe design requirement in structural strength, vibration characteristics, fatigue properties.Do not meet such as, arrester structure is joined
Number is adjusted, and repeats above-mentioned work, until meeting safe design requirement.
8) in parameter tuning process, the requirement that arrester dimensional parameters meet electric conductivity all the time need to be met, i.e., all the time
Meet the size requirement for being more than to go out given in 1).
By the implementation of above step, the determination to the blade lightning receptor system design scheme is completed.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright.The specific embodiment that the foregoing is only the present invention is should be understood that, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (7)
1. a kind of pneumatic equipment bladess thunder and lightning connects sudden strain of a muscle design method, it is characterised in that methods described at least comprises the following steps：
SS1. according to supporting target blade model and physical dimension, the initial model that thunder and lightning connects sudden strain of a muscle system, the thunder are set up
The initial model that electricity connects sudden strain of a muscle system includes metallic receptor, lower lead and metal connecting piece, wherein, the metallic receptor is extremely
Less include metal blade tip, metal tail rim segment and several described cylinder arresters, and the metal blade tip, metal tail rim segment and
Several described cylinder arresters are configured to a global facility, and several described cylinder arrester arranged for interval are in the metal tail
On the inner side construction section of rim segment, when the lightning receptor system is in installment state, the metal blade tip is arranged in blade
Tip, the metal tail rim segment is formed as the blade trailing edge of blade tip part, two end faces of the cylinder arrester with
Blade surface is concordant and in naked state, and the lower lead and metal connecting piece are arranged in the cavity of blade；
SS2. according to electric conductivity demand, the size that each position of sudden strain of a muscle system is connect to the thunder and lightning is tentatively estimated；
SS3. the thunder and lightning according to determined by tentatively being estimated step SS2 connects each spot size of sudden strain of a muscle system, with reference to wanted supporting target
Blade construction parameter, sets up the intact leaf finite element structure numerical model that sudden strain of a muscle system and blade other structures are connect comprising thunder and lightning；
SS4. the target blade ultimate load provided according to blade manufacturer, the blade finite element structure set up to step SS3
Model is analyzed, and is calculated the thunder and lightning and is connect the strength stress distribution for dodging various parts, while calculating the metallic receptor
It is affected by it, blade with the intensity distribution of the other position attachment structures of blade, and calculating due to being mounted with the metallic receptor
The intensity distribution situation at other positions；
SS5. the blade finite element structure model set up according to step SS3, calculating is mounted with that the thunder and lightning is connect after sudden strain of a muscle system, blade
Intrinsic frequency with response the vibration shape；
SS6. the blade finite element structure model set up using step SS3, the target blade provided according to blade manufacturer
Fatigue load, calculates the metallic receptor and arrester is connected the fatigue stress situation at position with blade other parts,
And contrasted with selected Metal Material Fatigue performance parameter, calculate the fatigue damage feelings of arrester and connecting portion
Condition, and calculate be mounted with after arrester, other positions of blade be affected by it after fatigue stress distribution situation and fatigue damage
Hinder distribution situation；
SS7. according to the overall mould of the blade that sudden strain of a muscle system is connect to the intensive analysis of arrester under ultimate load and blade, comprising thunder and lightning
Every analysis result such as analysis of fatigue of arrester and blade under state analysis, fatigue load, inspection is mounted with after arrester, connects sudden strain of a muscle
Whether device meets safe design requirement with blade in structural strength, vibration characteristics, fatigue properties, does not meet such as, each to arrester
The structural parameters at position are adjusted, and repeat above-mentioned work, until meeting safe design requirement.
2. according to the method described in claim 1, it is characterised in that in step SS3, the blade finite element numerical model is three
The FEM model that dimension body Model is combined with two-dimentional shell model, its Leaf arrester structure is three-dimensional body Model, blade its
It partly also carries out transition in the position being connected with arrester using three-dimensional body Model, and other blade-sections are two-dimentional shell mould
Type.
3. the method according to the claims, it is characterised in that in step SS4, Strength co-mputation under the ultimate load,
Including the stress distribution calculating to metal blade tip, metal trailing edge, metal column in arrester, and the other positions of blade and arrester
Stress distribution at connecting portion is calculated, and also needs the stress distribution for calculating the other positions of blade body to calculate.
4. the method according to the claims, it is characterised in that in step SS5, the modal calculation is that blade is other
After position is connected with arrester, integrally-built modal calculation.
5. the method according to the claims, it is characterised in that in step SS6, fatigue strength under the fatigue load
With Calculation of Fatigue Life, including the fatigue stress distribution of metal blade tip in arrester, metal trailing edge, metal column is calculated and fatigue
Life-span is calculated, and the other positions of blade are calculated and Calculation of Fatigue Life with the fatigue stress distribution at arrester connecting portion,
The fatigue stress distribution for calculating the other positions of blade body is also needed to calculate and Calculation of Fatigue Life.
6. the method according to the claims, it is characterised in that in step SS7, to arrester and blade strength, mould
In state, the assessment of fatigue behaviour, arrester intensity and intensity and fatigue life of the fatigue behaviour according to selected metal material
Parameter is estimated determination, and the intensity of blade (including blade and arrester connecting portion), mode, fatigue behaviour are assessed according to leaf
The requirement of the related industry standard of piece is estimated.
7. the method according to the claims, it is characterised in that in step SS7, was adjusted in arrester structural parameters
Cheng Zhong, need to meet the requirement that arrester dimensional parameters meet electric conductivity all the time, and each part dimension is met all the time and is not less than step
The size requirement gone out given in SS1.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956656A (en) * | 2017-12-29 | 2018-04-24 | 中国电力科学研究院有限公司 | A kind of wind power generation unit blade lightning protection connects sudden strain of a muscle system |
| 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 |
| CN108223306A (en) * | 2017-12-29 | 2018-06-29 | 中国电力科学研究院有限公司 | A kind of outer lightning protection for being overlying on wind power generation unit blade surface connects sudden strain of a muscle device |
| CN110230570A (en) * | 2018-09-27 | 2019-09-13 | 熊秀 | The method of flow guide bar is laid out on fan blade |
| CN110332081A (en) * | 2019-07-09 | 2019-10-15 | 中国华电科工集团有限公司 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
| CN110594108A (en) * | 2018-06-13 | 2019-12-20 | 中材科技风电叶片股份有限公司 | Apex lightning protection device, blade lightning protection system, fan blade and aerogenerator |
| CN110594109A (en) * | 2018-06-13 | 2019-12-20 | 中材科技风电叶片股份有限公司 | Apex lightning protection device, blade lightning protection system, fan blade and aerogenerator |
| CN117390368A (en) * | 2023-12-07 | 2024-01-12 | 云南电投绿能科技有限公司 | Lightning probability calculation method, device and equipment for wind turbine and storage medium |
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| CN110332081A (en) * | 2019-07-09 | 2019-10-15 | 中国华电科工集团有限公司 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
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