CN102269126B - Electric variable pitch control system - Google Patents
Electric variable pitch control system Download PDFInfo
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- CN102269126B CN102269126B CN2011101967189A CN201110196718A CN102269126B CN 102269126 B CN102269126 B CN 102269126B CN 2011101967189 A CN2011101967189 A CN 2011101967189A CN 201110196718 A CN201110196718 A CN 201110196718A CN 102269126 B CN102269126 B CN 102269126B
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- 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
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Abstract
The invention relates to an electric variable pitch control system. The system is provided with a fan controller, a variable pitch controller, a blade drive controller, a blade and a nut, wherein the variable pitch controller is used for receiving a blade angle signal and a blade speed signal which are transmitted by the fan controller and combining the signals into a single speed signal; the nutis positioned on the blade; a pressure sensor for acquiring a pressure signal is arranged on the nut; and the blade drive controller is used for controlling the blade to change pitch through the blade speed signal which is combined by the single speed signal and the pressure signal. By the electric variable pitch control system, the stability and the reliability of a unit electric signal are enhanced, and the service life of a unit standby power supply is prolonged.
Description
Technical field
The present invention relates to a kind of electric variable pitch of unit electric signal stability and reliability that can strengthen apart from control system.
Background technique
In the horizontal axis Large-scale Wind Turbines, generally adopt extreme span pitch regulator, this pitch regulator is mainly finished blade pitch and is regulated, control blade pitch angle, under rated wind speed, keep maximal wind-energy capture efficient, when wind speed during in the above change at random of rating value, by adjusting blade pitch blade is rotated along its vertical axle center, change air-flow to blade merit angle, thereby change the aerodynamic torque that the wind-powered electricity generation unit obtains, wind speed round can be stabilized near the rating value preferably, to guarantee stable output power and unit safety.When needs carried out aerodynamic brake, the pitch regulator made the maximum propeller pitch angle of blade rotation to 90 °, this moment entire blade was put away the oars and became a damping plate, utilize the effect of resistance of air that wind wheel is stopped operating.
The pitch regulator comprises control system and actuator's two-part, and the difference according to the driving mode of actuator can be divided into motor driving and hydraulic driving again.At present, the above Large-scale Wind Turbines of MW class adopts motor-driven electrodynamic type pitch regulator mostly.
Current electric variable pitch is to accept angle commands or speed command from controller of fan by communication modes apart from the method for control, and variable blade control system converts single rate signal to according to the angle commands of this controller of fan or rate signal and is transferred to the vane drive part.When in a single day the safety chain signal disappearance was taken place by controller of fan, blade was just put away the oars by standby power supply.But because factors such as the gravity of effects such as wind shear, turbulent flow, blade and centrifugal force, irregular variation takes place in blade loading, and unit is subjected to instantaneous mechanical shock easily.When in case theft-resistant link chain lacks when blower fan normally moves, blade just adopts not controlled putting away the oars, this not controlled mode of putting away the oars can cause blade and the structural member that is associated and drive unit to produce fatigue damage, the degree of the more big this fatigue damage of rotor diameter is also more obvious, and its consequence is to reduce the working life of pitch-controlled system and Security and the reliability of wind power generating set.
Chinese patent, the patent No. are CN 102011694, and patent name is " variable blade control system ", disclose the method that a kind of backup power source voltage is put away the oars when not enough, by the technology of Switching power, realize putting away the oars of blade.This patent has had been found that the harm that variable blade control system frequently uses standby power supply to put away the oars, and has adopted the technology of Switching power to avoid this situation.But do not tackle the problem at its root.How to reduce the frequency of usage of standby power supply; Wind generator set blade and unit itself are received violent mechanical shock when using standby power supply to put away the oars.
Chinese patent, the patent No. is CN 101476541, patent name is " independent feathering control system and the controlling method that are used for wind power generating set ", a kind of given method of oar control rate that becomes is disclosed, this method is by gathering the power of fan signal, the hub rotation speed signal, the impeller location signal, the blade oscillating signal is handled the change oar offset that forms blade through transient impact load compensation controller, at the change vane angle degree with power of fan controller sound field, periodically the output of uneven load compensating controller is coupled into a correct change oar control setting value.This process complexity is installed in the vibration transducer cost height of root of blade, and mounting technique has been proposed higher requirement; While method also is only applicable to the variable blade control system with the frequency variator driving.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the problem that proposes in the above-mentioned background technology, the invention provides a kind of stability and reliability that can strengthen the unit electric signal, the electric variable pitch in the working life of prolongation unit standby power supply is apart from control system.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electric variable pitch is apart from control system, have controller of fan, be used for to receive blade angle signal that controller of fan sends and velocity of blade signal and it is synthesized change oar controller, vane drive controller, the blade of single rate signal and be positioned at nut on the blade, the pressure transducer of gathering pressure signal is installed on the described nut, and the vane drive controller is by changing the slurry distance by single rate signal and the synthetic velocity of blade SC sigmal control blade of pressure signal.
Further: when becoming the safety chain signal disappearance of oar controller, the safety chain signal disappearance information that becomes the oar controller just is input in the vane drive controller, vane drive controller drive vane is put away the oars, when blade is put away the oars near the position of switch, switch sends a switching signal, after the vane drive controller receives switching signal, with reducing the speed of putting away the oars of blade, finally allow blade be in feather position; When the safety signal of vane drive controller lacked, system directly started standby power supply blade is put away the oars.
Further: the safety chain signal transmitter of external hub is connected wire signal connection simultaneously with change slurry controller wireless signal.
Beneficial effect of the present invention: electric variable pitch of the present invention is equipped with the pressure transducer of gathering pressure signal on the blade nut of control system, utilized the mechanical load information correction of blade to become the synthetic single rate signal of oar controller and formed velocity of blade SC sigmal control blade and change pitch, greatly reduce since wind speed rapidly shear cause the mechanical load concussion that blade and unit are subjected to; Becoming the oar controller is the upper level control system of vane drive controller, the safety signal of the two is separately independently, when becoming the safety chain signal disappearance of oar controller, can adopt the vane drive controller to put away the oars, when the vane drive controller signals lacks, directly start standby power supply and put away the oars, this greatly reduces the put away the oars generation of situation of standby power supply, strengthen the working life of standby power supply greatly, also reduced the mechanical shock that blade and unit are subjected to; The safety chain signal transmitter of external hub is connected simultaneously with change slurry controller wireless signal, and wire signal connects.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is electric signal schematic representation of the present invention;
Fig. 2 is the electric signal schematic representation when becoming the safety chain signal disappearance of oar controller.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic representation of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
A kind of electric variable pitch as shown in Figure 1 is apart from control system, have controller of fan, be used for to receive blade angle signal that controller of fan sends and velocity of blade signal and it is synthesized change oar controller, vane drive controller, the blade of single rate signal and be positioned at nut on the blade, the pressure transducer of gathering pressure signal is installed on the described nut, and the vane drive controller is by changing the slurry distance by single rate signal and the synthetic velocity of blade SC sigmal control blade of pressure signal.Since the pressure signal correction single rate signal, so greatly reduce since wind speed rapidly shear cause that the mechanical load that blade and unit be subjected to shakes.The safety chain signal transmitter of external hub is connected wire signal connection simultaneously with change slurry controller wireless signal, and no limited signal and wire signal all are input to and become in the oar controller.
As shown in Figure 2, when becoming the safety chain signal disappearance of oar controller, the safety chain signal disappearance information that becomes the oar controller just is transferred to the vane drive controller, the vane drive controller is determined speed according to the starting characteristic of blower fan, the speed driving blade that is generally 4～8 °/s is put away the oars, and puts away the oars near the position of switch when blade, and switch sends a switching signal, after the vane drive controller receives switching signal, will be according to 20～40mm/s
2Acceleration reduce the speed of putting away the oars of blade, finally allow blade stop at feather position; When the safety signal of vane drive controller lacks, will directly start standby power supply during this signal deletion blade will be put away the oars.Owing to adopted the measure of multilevel security chain, only when the safety signal of vane drive controller lacks, just directly starting standby power supply puts away the oars, this greatly reduces the situation generation that standby power supply is put away the oars, strengthen the life-span of standby power supply greatly, also reduced the mechanical shock that blade and unit are subjected to.
Be enlightenment with above-mentioned foundation desirable embodiment of the present invention, by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (2)
1. an electric variable pitch is apart from control system, has controller of fan, be used for to receive blade angle signal that controller of fan sends and velocity of blade signal and it is synthesized the change oar controller of single rate signal, the vane drive controller, blade and be positioned at nut on the blade, it is characterized in that: the pressure transducer of gathering pressure signal is installed on the described nut, the vane drive controller is by changing pitch by single rate signal and the synthetic velocity of blade SC sigmal control blade of pressure signal, when the safety chain signal of described change oar controller lacks, the safety chain signal disappearance information that becomes the oar controller just is input in the vane drive controller, vane drive controller drive vane is put away the oars, when blade is put away the oars near the position of switch, switch sends a switching signal, after the vane drive controller receives switching signal, with reducing the speed of putting away the oars of blade, finally allow blade be in feather position; When the safety signal of vane drive controller lacked, system directly started standby power supply blade is put away the oars.
2. a kind of electric variable pitch according to claim 1 is characterized in that apart from control system: the safety chain signal transmitter of external hub is connected wire signal connection simultaneously with change oar controller wireless signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101967189A CN102269126B (en) | 2011-07-14 | 2011-07-14 | Electric variable pitch control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101967189A CN102269126B (en) | 2011-07-14 | 2011-07-14 | Electric variable pitch control system |
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| Publication Number | Publication Date |
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| CN102269126A CN102269126A (en) | 2011-12-07 |
| CN102269126B true CN102269126B (en) | 2013-07-03 |
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| CN2011101967189A Active CN102269126B (en) | 2011-07-14 | 2011-07-14 | Electric variable pitch control system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603770B (en) * | 2013-11-23 | 2017-05-10 | 大连尚能科技发展有限公司 | fan variable pitch control system |
| CN104747372A (en) * | 2015-04-20 | 2015-07-01 | 常州易驱动电气科技有限公司 | Electric flexible pitch control system |
| CN106014856B (en) * | 2016-07-25 | 2018-12-18 | 张占兵 | A kind of efficient wind wheel apparatus |
| CN107762727B (en) * | 2016-08-19 | 2019-05-21 | 北京金风科创风电设备有限公司 | Control method and control system for wind turbine generator set emergency feathering |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2228121T3 (en) * | 1999-11-03 | 2005-04-01 | Vestas Wind Systems A/S | PROCEDURE FOR CONTROLLING THE OPERATION OF AN ELECTRIC TURBINE AND ELECTRIC TURBINE FOR USE IN THIS PROCEDURE. |
| ES2337645B1 (en) * | 2007-09-14 | 2011-03-11 | GAMESA INNOVATION & TECHNOLOGY, S.L. | SENSORIZED SHOVEL UNION. |
| US8262354B2 (en) * | 2008-08-27 | 2012-09-11 | General Electric Company | Method and apparatus for load measurement in a wind turbine |
| CN201730740U (en) * | 2010-06-26 | 2011-02-02 | 董海鹰 | Full-digital electric variable-propeller driver |
| CN202175187U (en) * | 2011-07-14 | 2012-03-28 | 江苏新誉重工科技有限公司 | Electric pitch-changing control system |
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| CN102269126A (en) | 2011-12-07 |
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