CN201621016U - Wind power generation vane in low wind velocity area - Google Patents

Wind power generation vane in low wind velocity area Download PDF

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Publication number
CN201621016U
CN201621016U CN2010201248232U CN201020124823U CN201621016U CN 201621016 U CN201621016 U CN 201621016U CN 2010201248232 U CN2010201248232 U CN 2010201248232U CN 201020124823 U CN201020124823 U CN 201020124823U CN 201621016 U CN201621016 U CN 201621016U
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CN
China
Prior art keywords
wind
blade
low
power generation
power
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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.)
Expired - Lifetime
Application number
CN2010201248232U
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Chinese (zh)
Inventor
蒯狄正
李群
徐洪
江林
殷明慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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Application filed by Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd filed Critical Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
Priority to CN2010201248232U priority Critical patent/CN201621016U/en
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Publication of CN201621016U publication Critical patent/CN201621016U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The utility model discloses a wind power generation vane applicable to a low wind velocity area. The vane is characterized in that: the root of the vane is wing shape S823, and the tip is wing shape S822 and provided with a sharpened transition section. The wind power generation vane is suitable for use in a low wind velocity area with the annual average wind velocity being 4-6m/s and applicable to a wind driven generator of which the rotor diameter ranges between 10-20m and the rated power for the wind power generator ranges between 10-50kW. By combining the wing shapes S823 and S822, the wind driven generator can be guaranteed to achieve the maximum absorption of wind energy and the best output power in an environment with low wind velocity, and the safety can also be guaranteed in case of accidental heavy wind.

Description

Low wind speed area wind power generation blade
Technical field
The present invention relates to a kind of wind-power generating system blade, especially relate to a kind of low wind speed area wind power generation blade, belong to the wind-power generating system technical field.
Background technique
Land wind energy resource area is an index with the annual mean wind power concentration, can be divided into 4 districts, and promptly the abundant district of wind energy resources, the abundant district of wind energy resources, wind energy resources can utilize district, the poor district of wind energy resources.With China is example, and land wind energy resource partitioning and the percentage that accounts for national area see Table 1.The available zone of wind energy resources, China land accounts for area about 76%.Table 1 is Chinese land wind energy resource partitioning and the percentage that accounts for national area.
Table 1
Sequence number The zone Annual mean wind energy specific power (W/m2) Account for national area percentage
1 Abundant district ≥200 8%
2 Abundant district 200~150 18%
3 Can utilize the district 150~50 50%
4 Poor district ≤50 24%
The wind energy development utilization of scale at present mainly in the abundant high wind speed district of wind energy resources, promptly concentrates on three northern areas of China and southeastern coast, and this part area only accounts for 8% of area; And abundant district of wind energy resources and wind energy resources can utilize the district, belong to average annual wind speed 〉=3.5m/s hour number and be 2000~5000 hours low wind speed district, and wind energy resources is not effectively developed.
For realizing the wind energy resources effective utilization of low wind speed area, suitable low-rated wind speed wind driven generating machine must be arranged.There is following limitation in the application of existing wind generating technology in low wind speed area:
(1) rated wind speed height is generally between 8~12m/s.Low wind speed area, especially wind energy resources can utilize the district, and annual mean wind speed generally is in 3 grades of Pu Shi, and (3.4m/s~5.4m/s) or slightly high, high specified wind speed wind power generator is inapplicable.
(2) in, small-power (50kW and following power) wind-driven generator, generally all adopt the mode of directly driving.Use in low wind speed area, and because of rotation speed of fan lower (80rpm is following), generator is difficult to satisfy the coupling requirement to adopt conventional high rated speed (150rpm and more than), and the low rated speed generator of configuration, exists volume, weight big again, the problem that expense is high.
(3) direct-driving type wind-powered electricity generation machine, excessive when impeller diameter, when surpassing 10 meters, rotating speed is big under the sporadic strong wind, and the potential safety hazard of impeller is excessive.
(4) existing blade of wind-driven generator aerofoil profile, the wind speed section of optimal wind energy utilization factor is generally between 8~12m/s, under the low wind friction velocity, when especially being lower than 6m/s wind speed section, power coefficient is relatively poor, is difficult to satisfy capture the wind energy maximization under the low wind friction velocity.
(5) in the routine, small-power wind-powered electricity generation machine generally adopts magneto alternator, because of the effect of slot effect, generator can produce bigger starting torque, and electromagnetic torque produces pulsation when starting or running.The application of iron core simultaneously makes that generator weight increases, the existence of core loss makes loss increase again.
In sum, conventional high specified wind speed wind power generator is not suitable for the abundant district of wind energy resources and wind energy resources can utilize the district, at low wind speed area, the wind-power generating system of the low rated speed that need to develop is suitable for, efficient, economic and reliable is changed to realize low wind speed environment efficient, reliable wind power down.
As the breach of present Wind Power Utilization and improving and replenishing of Wind Power Utilization limitation, development and popularization low-rated wind speed wind driven generating have economy and social value widely.
Power generation system fan blade for low wind speed area need carry out special design, if rated wind speed is too high, unit rated power operation time number reduces, transmission system and generator cost are higher, improved cost of energy, if rated wind speed is too low, the cost of impeller and support thereof is too high with respect to the wind-powered electricity generation amount.
Summary of the invention
The invention technical solution problem of wanting provides a kind of wind-power generating system blade that is applicable to the economic and reliable in low wind speed area.
For solving the problems of the technologies described above, the utility model provides a kind of low wind speed area wind power generation blade, comprises blade root and blade tip, and it is characterized in that: described blade root place is the S823 aerofoil profile, and the blade tip place is the S822 aerofoil profile, and the blade tip place is provided with the sharpening changeover portion.Blade is 5~8 o'clock at tip speed ratio, Wind Power Utilization the best of blade, and the maximal wind-energy utilization factor is 0.46.
Aforesaid low wind speed area wind power generation blade, it is characterized in that: blade is along the high direction of leaf, and the S823 aerofoil profile equates that with S822 aerofoil profile proportion two kinds of aerofoil profiles of intermediate section adopt the equal proportion transition, the blade intermediate section is toward the blade root place, and the S823 ratio increases gradually, the S822 ratio reduces gradually; Intermediate section is toward the blade tip place, and the S823 ratio reduces gradually, the S822 ratio increases gradually; Be provided with 100mm sharpening changeover portion at the blade tip place
The beneficial effect that the utility model reached:
Wind power generation blade of the present utility model, owing to adopt the Airfoil Design of S823 and S822 combination, suit to use, be applicable to 10~20 meters of rotor diameters, the wind-driven generator of wind-power electricity generation rated power between 10kW~50kW in the low wind speed area of annual mean wind speed 4m/s~6m/s.Blade is 5~8 o'clock at tip speed ratio, Wind Power Utilization the best of blade, and the maximal wind-energy utilization factor is 0.46.Can guarantee that wind-driven generator realizes that under low wind speed environment maximal wind-energy absorbs, output power the best guarantees the safety under the sporadic big wind condition simultaneously.
Description of drawings
Fig. 1 is the wind-power generating system structural representation;
Fig. 2 is the aerofoil profile schematic representation, and wherein (a) is S822 aerofoil profile schematic representation; (b) be S823 aerofoil profile schematic representation;
The blade signal that Fig. 3 designs for the utility model;
The blade tip partial view that Fig. 4 designs for the utility model;
Fig. 5 is the blade root partial enlarged view of the wind wheel of three blades composition;
Fig. 6 is 6 meters blade chord lengths and radius relationship, other blade and 6 meters length of blade direction equal proportions;
Fig. 7 is 6 meters twist angle of blade and radius relationship, other blade and 6 meters length of blade direction equal proportions;
Fig. 8 is blade tip-speed ratio and power coefficient relation.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the wind-power generating system structural representation.Wind-power generating system comprises formations such as fan blade (blade 1 and wheel hub 2), braking mechanism 3, speed increasing mechanism 4, generator 5, Yawing mechanism 6, support structure beam 7, base plate 8, concrete shaft tower 9.Described blade root place is the S823 aerofoil profile, and the blade tip place is S822.Be provided with 100mm sharpening changeover portion at the blade tip place.
The wind-powered electricity generation machine blade of low wind speed environment made up blade optimal design platform for design is applicable to, this platform is made up of four function modules: 1. genetic algorithm numerical optimization module; 2. wind wheel performance calculating module; 3. twist angle of blade and Chord Length Parameterization module; 4. objective function is provided with module.
According to designing requirement, design wind speed is got 6m/s, the wind wheel radius is got 6m, 9m or other length, the wind wheel blade number is 3, design object is a wind wheel output power maximum, use blade optimal design platform, obtain the blade three-dimensional modeling, adopt computer numerical emulation to draw in the wind energy conversion system operating air velocity scope then, wind wheel output power and wind speed round and respective relationships curve are for load (generator and the combination of parallel network reverse power supply) and wind wheel full operating mode coupling under design wind speed and non-design wind speed provide foundation.
For further improving the wind energy conversion system output power and reducing the noise that the blade tip whirlpool produces, increase 100mm sharpening changeover portion at the blade tip place.
Protection domain of the present utility model is not limited to the protection domain in the embodiment, and the distortion that does not need creative work that embodiment is made all belongs to protection domain of the present utility model.

Claims (2)

1. one kind low wind speed area wind power generation blade comprises blade root and blade tip, and it is characterized in that: described blade root place is the S823 aerofoil profile, and the blade tip place is that S822 aerofoil profile blade tip place is provided with the sharpening changeover portion.
2. low wind speed according to claim 1 area wind power generation blade, it is characterized in that: blade is along the high direction of leaf, the S823 aerofoil profile equates with S822 aerofoil profile proportion, two kinds of aerofoil profiles of intermediate section are the equal proportion transition, the blade intermediate section is toward the blade root place, and the S823 ratio increases gradually, the S822 ratio reduces gradually; Intermediate section is toward the blade tip place, and the S823 ratio reduces gradually, the S822 ratio increases gradually; Described sharpening changeover portion at the blade tip place is 100mm.
CN2010201248232U 2010-03-08 2010-03-08 Wind power generation vane in low wind velocity area Expired - Lifetime CN201621016U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2010201248232U CN201621016U (en) 2010-03-08 2010-03-08 Wind power generation vane in low wind velocity area

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033331A (en) * 2014-06-06 2014-09-10 株洲时代新材料科技股份有限公司 Method for designing wind power generation blade family
CN111207039A (en) * 2020-02-24 2020-05-29 沈阳永磁电机制造有限公司 Pure square wave permanent magnet wind-collecting type wind power generation system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033331A (en) * 2014-06-06 2014-09-10 株洲时代新材料科技股份有限公司 Method for designing wind power generation blade family
CN111207039A (en) * 2020-02-24 2020-05-29 沈阳永磁电机制造有限公司 Pure square wave permanent magnet wind-collecting type wind power generation system

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C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: JIANGSU ELECTRIC POWER CO. STATE ELECTRIC NET CROP

Effective date: 20121023

Owner name: THE ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF J

Free format text: FORMER OWNER: JIANGOU PROVINCIAL POWER TEST INST CO., LTD.

Effective date: 20121023

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 210029 NANJING, JIANGSU PROVINCE TO: 210036 NANJING, JIANGSU PROVINCE

TR01 Transfer of patent right

Effective date of registration: 20121023

Address after: 210036 Fenghuang West Street, Jiangsu, Nanjing, China, No. 243

Patentee after: Electric Power Research Institute of Jiangsu Electric Power Company

Patentee after: Jiangsu Electric Power Company

Patentee after: State Grid Corporation of China

Address before: 210029 No. 243 Fenghuang West Street, Jiangsu, Nanjing

Patentee before: Jiangou Provincial Power Test Inst Co., Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20101103