CN102003353B - Deicing method for blades of large-scale wind driven generator - Google Patents
Deicing method for blades of large-scale wind driven generator Download PDFInfo
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- CN102003353B CN102003353B CN2010105812553A CN201010581255A CN102003353B CN 102003353 B CN102003353 B CN 102003353B CN 2010105812553 A CN2010105812553 A CN 2010105812553A CN 201010581255 A CN201010581255 A CN 201010581255A CN 102003353 B CN102003353 B CN 102003353B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a deicing method for blades of a large-scale wind driven generator, which comprises the following steps: (1) collecting icing signals by adopting an icing detector, inputting the icing signals into an icing rate solver, inputting rate signals transmitted by the icing rate solver to a controller, starting an air heating system by the controller, and feeding hot air into circulation channels in blades for heat exchange by a fan; and (2) detecting liquid water generated by heat absorption and thawing of an ice layer through a liquid water content detector, inputting signals into a liquid water generation rate solver, inputting rate signals transmitted from the liquid water generation rate solver to a controller, and fluttering blades and shaking off the ice layer under the action of a variable pitch system and a yaw system which are in accelerated motion at first and then in decelerated motion when the generation rate is more than zero and is accelerated ceaselessly. In the invention, the compactness and absorption force of the combinative ice layer and the blades can be reduced in a mode of firstly heating and finally fluttering so as to lower the fluttering amplitude of fluttering deicing, thus achieving the aims of fully deicing, saving energy, and having higher safety and reliability.
Description
Technical field
The present invention relates to a kind of blade de-icing method, relate in particular to a kind of blades of large-scale wind driven generator de-icing method.
Background technique
Along with going from bad to worse of energy shortage and ecotope, wind-driven generator application in the world more and more widely singly is not to use in the relatively more suitable area of weather, and is suitable in the colder area of weather yet.Area in cold; The air dynamic behaviour of blade of wind-driven generator is as easy as rolling off a log to receive icing influence, is prone on the blade of wind-driven generator freeze, along with thickening of ice sheet; Can bear bigger gravity on the aerofoil profile; Make the lift aerofoil be changed, thereby make the aerodynamic performance of blade descend, influence wind-power electricity generation efficient.Therefore, blade is carried out deicing and seem particularly important.
In the existing technology, the most representative de-icing method is the de-icing method that Denmark Vestas Wind Systems AS and GE propose.
The patent of Denmark Vestas Wind Systems AS application; Publication number 101821500A disclosed " being used for method, wind turbine and use thereof " to the blade deicing of wind turbine; Take to shut down the method for rear blade deicing at wind-driven generator; Promptly make blade form to quicken become trembling of slowing down behind the oar, shake off freezing on the blade through the vane propeller-changing motor.The shortcoming of this method is; For large-scale wind driven generator, its root is because the amplitude of vibration is smaller, and the very difficult ice sheet that will be overlying on root of blade is removed; When ice sheet reached certain thickness, the method that is difficult to only tremble through increase was removed ice sheet fully; And this dependence increases the de-icing method of chatter amplitude, not only is difficult to the icing removal with root; And the bigger impulsive load of formation; Whole wind powered generator system is impacted, reduce the working life of related components, thereby reduce the Security and the reliability of wind power generating set.
The patent of GE's application; Publication number 1727673 disclosed " being used to remove the method and apparatus of the ice on aerofoil profile or the rotor blade "; This method is through being contained in the heating equipment heated air on the blade of wind-driven generator; Adopt blower that hot air is transported in the circulation canal in the blade, hot air flows to blade tip from blade root, flows to the blade root heating that circulates from blade tip again.The shortcoming of this method is, for high-power wind-driven generator, blade is long, and when the amount of freezing was bigger, the heat that blade absorbs was difficult to reach the required requirement of ice-melt; And for the blade tip part, hot air can't arrive, and the ice sheet that invests tip segment is difficult to remove.Because the material of blade is generally materials such as cloth, resin, timber, graphite fiber, if improve the temperature of hot air by force through heating equipment, not only power consumption is big, and possibly cause the blade burning, is absolutely unsafe.
The patent of invention content
To the above-mentioned deficiency that exists in the existing technology, the purpose of this invention is to provide a kind of blade of can fully removing and freeze, and Security and reliability are higher, the blades of large-scale wind driven generator de-icing method that can use on a large scale.
Blades of large-scale wind driven generator de-icing method provided by the invention comprises the steps:
(1), icing detector is arranged on blade surface; Adopt icing detector to gather the icing signal on the blade; And with the icing speed solver of signal input, the speed solver that freezes sends the rate signal input controller, and controller starts air heating system; In the circulation canal in the hot air input blade after adopting blower with the air heating system heating, get into air heating system again with the air that flows out circulation canal after the blade heat exchange;
(2), the liquid water content detector that adopts blade surface to be provided with detects the ice sheet heat absorption and melts the liquid water that produces; And signal imported liquid water generating rate solver; Liquid water generating rate solver sends the rate signal input controller; The generating rate of the liquid water that detects at liquid water generating rate solver is greater than zero and when constantly accelerating, and controller sends control signal, starts pitch-controlled system and yaw system; Pitch-controlled system and yaw system are formed quicken earlier the back retarded motion, blade produces flutter and shakes off and begun the ice sheet that melts on the blade.
Compared with prior art, blades of large-scale wind driven generator de-icing method of the present invention has following advantage:
1, with existing technology in single de-icing method compare, the method for using hot air circulate and flutter to combine can more effectively be removed all icing on the blade, the air dynamic behaviour of maintenance blade of wind-driven generator.
2, adopt icing detector and liquid water content detector to gather signal, can detect icing situation on the blade timely and effectively, and testing signal is sent to controller, in time take corresponding deicing response.
3, utilize the method for heating back flutter earlier, can remove the ice sheet that leaf root part is difficult to remove through the flutter method effectively.
4, the method for utilizing hot air circulate to combine with flutter can be removed the ice sheet that the inaccessible position of tip segment hot air is covered effectively through flutter.
5, adopt hot air and blade to carry out heat exchange earlier; Adopt the method deicing of flutter again; Can reduce the needed heat of deicing; Heating power requirement to heating system is lower, reaches the purpose of saving energy, can also avoid the unsafe factor that causes because the interior temperature of blade cavity is too high simultaneously.
6, adopt the hot air circulate heating earlier, adopt the method for flutter again, can reduce the tightness that ice sheet combines with blade, reduce the adsorption force of ice sheet and blade, thereby reduce the flutter amplitude of flutter deicing, the working life of keeping related components.
Description of drawings
Fig. 1 is the structural representation of blades of large-scale wind driven generator deicer;
Fig. 2 is the control flow chart of blades of large-scale wind driven generator de-icing method.
Among the figure, 1-icing detector; 2-blade; 3-the speed solver freezes; 4-controller; 5-air heating system; 6-blower; 7-liquid water content detector; 8-liquid water generating rate solver; 9-pitch-controlled system; 10-yaw system; 11-circulation canal.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done to describe in further detail.
Fig. 1 is the structural representation of blades of large-scale wind driven generator deicer, and is as shown in the figure.
The blades of large-scale wind driven generator de-icing method comprises the steps:
(1), icing detector 1 is arranged on blade 2 surfaces; The icing signal that adopts icing detector 1 to gather on the blade 2; And with the icing speed solver 3 of signal input; The speed solver 3 that freezes sends rate signal input controller 4, and controller 4 starts air heating system 5 (in the present embodiment, air heating system 5 adopts the resistance wire heating); In the circulation canal 11 in the hot air input blade 2 after adopting blower 6 with air heating system 5 heating, get into air heating system again with the air that flows out circulation canal 3 after blade 2 heat exchanges.
(2), the liquid water content detector 7 that adopts blade 2 surfaces to be provided with detects the ice sheet heat absorption and melts the liquid water that produces; And signal imported liquid water generating rate solver 8; Liquid water generating rate solver 8 sends rate signal input controller 4; The generating rate of the liquid water that detects at liquid water generating rate solver 8 is greater than zero and when constantly accelerating, and controller 4 sends control signal, starts pitch-controlled system 9 and yaw system 10; Pitch-controlled system 9 is formed with yaw system 10 quicken the back retarded motion earlier, blade 2 produces flutters and shakes off and begun the ice sheet that melts on the blade 2.
Fig. 2 is the control flow chart of blades of large-scale wind driven generator de-icing method, and is as shown in the figure.When speed solver 3 is frozen in the icing signal input on the icing detector 1 collection blade 2; The signal V1=0 that the speed solver 3 that freezes detects (being not freeze on the blade); Controller 4 does not send control command, and air heating system 5, blower 6, pitch-controlled system 9 and yaw system 10 are failure to actuate.The signal V1 that the speed solver 3 that freezes detects>0 (be have on the blade icing); And the signal V2=0 that liquid water generating rate solver 8 detects (generating rate that is liquid water is zero, and freezing on blade also do not begin to melt), controller 4 sends control signal; Start air heating system; To air heating, the hot air after blower 6 heats air heating system 5 is imported in the circulation canal 11 in the blade 2, and carries out heat exchange with blade; The signal V2 that detects when liquid water generating rate solver 8>0 (generating rate that is liquid water is greater than zero and when constantly accelerating); Controller 4 sends control signal; Start pitch-controlled system 9 and yaw system 10, become oar driven by motor vane propeller-changing, the driftage of yaw motor drive system; Pitch-controlled system 9 is formed with yaw system 10 quicken the back retarded motion earlier, blade 2 produces flutters and shakes off and begun the ice sheet that melts on the blade 2.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of this patent; And not breaking away from the aim and the scope of patent art scheme, it all should be encompassed in the middle of the claim scope of this patent.
Claims (1)
1. a blades of large-scale wind driven generator de-icing method is characterized in that, comprises the steps:
(1), icing detector (1) is arranged on blade (2) surface; Adopt icing detector (1) to gather the icing signal on the blade (2); And with the icing speed solver (3) of signal input; The speed solver (3) that freezes sends rate signal input controller (4); Controller (4) starts air heating system (5), adopts in the circulation canal (11) in the hot air input blade (2) after blower (6) heats air heating system (5), gets into air heating system (5) again with the air that flows out circulation canal (3) after blade (2) heat exchange;
(2), the liquid water content detector (7) that adopts blade (2) surface to be provided with detects the ice sheet heat absorption and melts the liquid water that produces; And testing signal imported liquid water generating rate solver (8); Liquid water generating rate solver (8) sends rate signal input controller (4); The generating rate of the liquid water that detects at liquid water generating rate solver (8) is greater than zero and when constantly accelerating; Controller (4) sends control signal; Start pitch-controlled system (9) and yaw system (10), retarded motion after pitch-controlled system (9) and yaw system (10) being formed quicken earlier, blade (2) generation flutter and shaking off have begun the ice sheet that melts on the blade (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105812553A CN102003353B (en) | 2010-12-10 | 2010-12-10 | Deicing method for blades of large-scale wind driven generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105812553A CN102003353B (en) | 2010-12-10 | 2010-12-10 | Deicing method for blades of large-scale wind driven generator |
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| Publication Number | Publication Date |
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| CN102003353A CN102003353A (en) | 2011-04-06 |
| CN102003353B true CN102003353B (en) | 2012-05-23 |
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| CN2010105812553A Expired - Fee Related CN102003353B (en) | 2010-12-10 | 2010-12-10 | Deicing method for blades of large-scale wind driven generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3165766A1 (en) * | 2015-11-06 | 2017-05-10 | Acciona Windpower, S.A. | Wind turbine and method for ice removal in wind turbines |
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|---|---|---|---|---|
| CN102213191A (en) * | 2011-05-20 | 2011-10-12 | 叶卫 | Device and method for preventing rotor blade of wind driven generator from freezing |
| CN102230454B (en) * | 2011-06-24 | 2013-04-24 | 三一电气有限责任公司 | Wind generating set blade structure and processing method thereof |
| US8434360B2 (en) * | 2011-07-22 | 2013-05-07 | General Electric Company | System and method for detecting ice on a wind turbine rotor blade |
| CN102322405B (en) * | 2011-08-16 | 2013-03-06 | 国电联合动力技术有限公司 | Deicing and freeze resisting system for blade of wind generating set |
| CN102562479A (en) * | 2011-11-23 | 2012-07-11 | 内蒙古航天亿久科技发展有限责任公司 | Large fan blade deicing system and method thereof |
| CN103603776B (en) * | 2013-11-23 | 2016-03-02 | 大连尚能科技发展有限公司 | A kind of prediction algorithm of wind generating set pitch control Security |
| CN103590972B (en) * | 2013-11-23 | 2017-02-08 | 大连尚能科技发展有限公司 | Variable pitch self-protection method for wind turbine generator set |
| CN107100803B (en) * | 2017-05-02 | 2019-03-29 | 湖南拓天节能控制技术股份有限公司 | Based on air heating fan blade is anti-icing, deicing system |
| CN107829888B (en) * | 2017-11-20 | 2023-10-03 | 浙江运达风电股份有限公司 | Partition type hot air blower heating wind generating set blade deicing method and system |
| CN108730133A (en) * | 2018-06-08 | 2018-11-02 | 株洲时代新材料科技股份有限公司 | Wind power generation unit blade integrally anti-icing method and product |
| CN109899249B (en) * | 2019-03-28 | 2023-04-28 | 安徽驭风风电设备有限公司 | Wind power blade deicing device and method |
| CN113137330B (en) * | 2021-05-08 | 2022-02-22 | 中国华能集团清洁能源技术研究院有限公司 | Wind turbine blade with deicing function |
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| CN1707262A (en) * | 2004-06-10 | 2005-12-14 | 通用电气公司 | Methods and apparatus for rotor blade ice detection |
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| CN101821500A (en) * | 2007-10-05 | 2010-09-01 | 维斯塔斯风力系统有限公司 | Method for de-icing blade of wind turbine, wind turbine and use thereof |
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2010
- 2010-12-10 CN CN2010105812553A patent/CN102003353B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| CN1707262A (en) * | 2004-06-10 | 2005-12-14 | 通用电气公司 | Methods and apparatus for rotor blade ice detection |
| CN1727673A (en) * | 2004-07-20 | 2006-02-01 | 通用电气公司 | Methods and apparatus for deicing airfoils or rotor blades |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3165766A1 (en) * | 2015-11-06 | 2017-05-10 | Acciona Windpower, S.A. | Wind turbine and method for ice removal in wind turbines |
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| CN102003353A (en) | 2011-04-06 |
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Granted publication date: 20120523 Termination date: 20131210 |