CN103899481A - Wind turbine yaw system and method - Google Patents
Wind turbine yaw system and method Download PDFInfo
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- CN103899481A CN103899481A CN201410138313.3A CN201410138313A CN103899481A CN 103899481 A CN103899481 A CN 103899481A CN 201410138313 A CN201410138313 A CN 201410138313A CN 103899481 A CN103899481 A CN 103899481A
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- pressure
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- yaw
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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
Abstract
The invention provides a wind turbine yaw system and method. Through a pressure sensor and a data processing unit, according to a difference between side pressures borne by two sides of a wind turbine bearing when a wind turbine is not aligned with the wind direction, an accurate control command is transmitted to a yaw motor, the wind turbine is aligned with the wind direction, and yaw wind alignment with higher precision and higher detection sensitivity is truly achieved accordingly. In addition, a delay unit is used to delay the control command, and yaw misjudgment in accidental conditions such as a gust is prevented according to the difference between the pressures in a delay time.
Description
Technical field
The present invention relates to wind-powered electricity generation set yaw technical field, relate in particular to a kind of fan yaw system and driftage method.
Background technique
Wind energy is constantly to change, along with the variation of wind direction, wind energy conversion system needs yaw system to promote rotation to aim at wind direction, the yaw system of wind energy conversion system is also referred to as to wind apparatus, its role is in the time that the direction of wind vector changes, can quick smoothly aim at wind direction, so that wind wheel obtains maximum wind energy.
The conventional tail vane of little minitype wind power machine is to wind, and it is mainly to utilize the empennage being contained on foot piece parallel with rotor shaft or have a certain degree to realize tail vane to wind.For fear of the impact of wake flow, also empennage can be upwarped, be contained in higher position.
Middle-size and small-size blower fan can be with steering wheel as to wind apparatus, its working principle is roughly as follows: in the time of wind vector, be positioned at two steering wheels (its plane of rotation and wind wheel plane of rotation are perpendicular) rotation after wind wheel, and make wind wheel deflection by set of gears transmission system, when wind wheel is aimed at after wind direction again, steering wheel stops operating, and wind process is finished.
Big-and-middle-sized wind energy conversion system is general to be adopted electronic yaw system to adjust wind wheel and makes it aim at wind direction.Yaw system generally comprises the wind vane, yaw motor, driftage plane table thermoconductivity meter, solid of rotation gearwheel etc. of induction wind direction.Its working principle is as follows:
Wind vane is delivered to the variation of wind direction as sense cell in the processor of control loop of yaw motor with electrical signal, send clockwise or counterclockwise driftage order to yaw motor through processor after relatively, gyrostatic moment while driftage in order to reduce, yaw motor rotating speed is by after slowing down by the coaxial driftage plane table thermoconductivity meter connecting, yawing moment is acted on solid of rotation gearwheel, drive wind wheel to go off course to wind, after wind is completed, wind vane loses electrical signal, motor quits work, and driftage process finishes.
But, at present above-mentioned electronic yaw system, only drive driftage according to the variation of wind direction, if wind-force is very little, when wind vector is little, will certainly there is the problem that cannot accurately go off course.
Therefore, need a kind of new fan yaw system and driftage method, to avoid above-mentioned defect.
Summary of the invention
The object of the present invention is to provide a kind of fan yaw system and driftage method, can improve the precision of driftage to wind.
For addressing the above problem, the present invention proposes a kind of fan yaw system, comprising: blower fan, pressure transducer, data processing unit and yaw motor; Pressure and/or pressure information that described pressure transducer bears for gathering the main shaft bearing both sides of described blower fan, described data processing unit drives described blower fan to go off course to wind according to yaw motor described in described pressure and/or pressure information control.
Further, described pressure transducer is positioned at the wind wheel main shaft bearing both sides of described blower fan, and horizontal symmetrical is arranged.
Further, every side of described wind wheel main shaft bearing is provided with at least one pressure transducer.
Further, described data processing unit comprises:
One for calculating the first computing element of the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
One comparing element comparing for pressure difference that described the first computing element is obtained and/or pressure difference and a setting threshold;
One for calculating the wind wheel axis deviation of directivity value of wind direction and blower fan and determine whether to need the second computing element of driftage adjusted value to wind to wind and driftage according to described deviate according to described pressure difference and/or pressure difference and described setting threshold;
One for the PLC controller to described yaw motor output control command according to the result of calculation of described the second computing element.
Further, described fan yaw system also comprises a delay unit, described data processing unit produces for controlling the control command of described yaw motor after receiving described pressure and/or pressure information, and described control command is sent to described yaw motor place after delay unit time delay.
Further, described fan yaw system also comprise one with the coaxial driftage plane table thermoconductivity meter connecting of described yaw motor, described yaw motor drives wind wheel to go off course to wind by described driftage plane table thermoconductivity meter.
The present invention also provides a kind of fan yaw method, comprises the following steps:
Be provided for gathering pressure that blower fan bears and/or the pressure transducer of pressure information in the main shaft bearing both sides of a blower fan, the data processing unit that is provided for processing described pressure and/or pressure information simultaneously and controls the yaw motor of described blower fan;
Pressure and/or the pressure information of blower fan main shaft bearing both sides described in described pressure transducer Real-time Collection, described data processing unit is processed described pressure and/or pressure information in real time;
In the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference does not exceed a setting threshold, yaw motor is not worked;
In the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference exceedes described setting threshold, described data processing unit to described wind wheel main shaft bearing pressure at both sides poor and/or pressure difference analyze, when one side pressure of described wind wheel main shaft bearing strong time bigger than normal, described data processing unit sends to the instruction of opposite side driftage, described yaw motor drives described blower fan to go off course to opposite side, until described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference again drop to described setting threshold just stop below driftage.
Further, the real-time step of processing described pressure and/or pressure information of described data processing unit comprises:
Calculate the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
Calculate the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
The pressure difference that described the first computing element is obtained and/or pressure difference and a setting threshold compare, to determine whether needing driftage to wind;
Calculate the wind wheel axis deviation of directivity value of wind direction and blower fan according to described pressure difference and/or pressure difference and described setting threshold, to determine the adjusted value of driftage to wind;
Export control command according to described adjusted value to described yaw motor.
Further, the instruction to opposite side driftage that described data processing unit sends is sent to described yaw motor after a delay unit time delay.
Compared with prior art, fan yaw system of the present invention and driftage method, by the pressure transducer and the data processing unit that arrange, the side pressure that while utilizing blower fan not aim at wind direction, bear wind wheel bearing both sides and/or pressure poor, send accurately control command to yaw motor, make blower fan aim at wind direction, thus Star arrived precision higher, detect sensitiveer driftage to wind effect.Further, by delay unit is set, control command is carried out to time delay, prevent the driftage erroneous judgement under the contingencies such as fitful wind in conjunction with the difference of the pressure in delay time section and/or pressure simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fan yaw system of the specific embodiment of the invention;
Fig. 2 is the structural representation of the data processing unit of the specific embodiment of the invention;
Fig. 3 is the fan yaw method flow diagram of the specific embodiment of the invention;
Fig. 4 is the flow chart of the data processing unit processing data of the specific embodiment of the invention.
Embodiment
Core concept of the present invention is open a kind of fan yaw system and driftage method, by the pressure transducer and the data processing unit that arrange, the side pressure that while utilizing blower fan not aim at wind direction, bear wind wheel bearing both sides and/or pressure poor, send accurately control command to yaw motor, make blower fan aim at wind direction, thus Star arrived precision higher, detect sensitiveer driftage to wind effect.Further, by delay unit is set, control command is carried out to time delay, prevent the driftage erroneous judgement under the contingencies such as fitful wind in conjunction with the difference of the pressure in delay time section and/or pressure simultaneously.
For object of the present invention, feature are become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described, but the present invention can realize by different forms, should not think and just be confined to described embodiment.
Please refer to Fig. 1, the present embodiment provides a kind of fan yaw system, comprising: blower fan 1, pressure transducer 12, data processing unit 13 and yaw motor 15; Pressure and/or pressure information that described pressure transducer 12 bears for gathering wind wheel main shaft bearing 11 both sides of described blower fan, described data processing unit 13 drives described blower fan 1 to go off course to wind according to yaw motor 15 described in described pressure and/or pressure information control.
Wherein, described pressure transducer 12 is positioned at wind wheel main shaft bearing 11 both sides of described blower fan 1, horizontal symmetrical layout, and preferred, every side of described wind wheel main shaft bearing 11 is provided with at least one pressure transducer 12.
Please refer to Fig. 2, in the present embodiment, described data processing unit 13 comprises:
One for calculating the first computing element 131 of the pressure difference of described wind wheel main shaft bearing 11 both sides according to the pressure of described wind wheel main shaft bearing 11 both sides and/or pressure information;
One comparing element 132 comparing for pressure difference that described the first computing element 131 is obtained and/or pressure difference and a setting threshold;
One for calculating the wind wheel axis deviation of directivity value of wind direction and blower fan and determine whether to need the second computing element 133 of driftage adjusted value to wind to wind and driftage according to described deviate according to described pressure difference and/or pressure difference and described setting threshold;
One for exporting the PLC controller 134 of control command to described yaw motor 15 according to the result of calculation of described the second computing element 133.
In the present embodiment, described fan yaw system also comprises a delay unit 14, described data processing unit 13 produces for controlling the control command of described yaw motor 15 after receiving described pressure and/or pressure information, described control command is sent to described yaw motor 15 places, the erroneous judgement prevent the contingencies such as fitful wind during with this after delay unit 14 time delays.Particularly, if within this period of time of delay unit 14 time delays, pressure difference or the pressure difference of pressure at both sides sensor 12 turn back to normal value, drop to below described setting threshold, and the driftage instruction of data processing unit 13 is cancelled; If within this period of time of delay unit 14 time delays, the pressure difference of pressure at both sides sensor 12 or pressure difference still exceed setting threshold, delay unit 14 moves control command is sent to yaw motor 15, completes driftage.
Preferably, described fan yaw system also comprise one with the coaxial driftage plane table thermoconductivity meter (not shown) connecting of described yaw motor 15, described yaw motor 15 drives wind wheel to go off course to wind by described driftage plane table thermoconductivity meter smoothly.
Please refer to Fig. 3, the present invention also provides a kind of fan yaw method, comprises the following steps:
S1, is provided for gathering pressure that blower fan bears and/or the pressure transducer of pressure information, the data processing unit that is provided for processing described pressure and/or pressure information simultaneously and controls the yaw motor of described blower fan in the main shaft bearing both sides of a blower fan;
S2, pressure and/or the pressure information of blower fan main shaft bearing both sides described in described pressure transducer Real-time Collection, described data processing unit is processed described pressure and/or pressure information in real time;
S3, in the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference does not exceed a setting threshold, yaw motor is not worked;
S4, in the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference exceedes described setting threshold, described data processing unit drives described fan yaw according to stating yaw motor described in the poor and/or pressure difference control of wind wheel main shaft bearing pressure at both sides, wherein, described data processing unit to described wind wheel main shaft bearing pressure at both sides poor and/or pressure difference analyze, when one side pressure of described wind wheel main shaft bearing strong time bigger than normal, described data processing unit sends to the instruction of opposite side driftage, described yaw motor drives described blower fan to go off course to opposite side, until described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference again drop to described setting threshold just stop below driftage.
Please refer to Fig. 4, in step S2, the process that described data processing unit is processed described pressure and/or pressure information in real time comprises:
S21, calculates the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
S22, the pressure difference that described the first computing element is obtained and/or pressure difference and a setting threshold compare, to determine whether needing driftage to wind;
S23, calculates the wind wheel axis deviation of directivity value of wind direction and blower fan, to determine the adjusted value of driftage to wind according to described pressure difference and/or pressure difference and described setting threshold;
S24, exports control command according to described adjusted value to described yaw motor.
In step S24, the instruction to opposite side driftage that described data processing unit sends is sent to described yaw motor, the erroneous judgement prevent the contingencies such as fitful wind during with this after a delay unit time delay.Particularly, if within this period of time of delay unit time delay, pressure difference or the pressure difference of pressure at both sides sensor turn back to normal value, drop to below described setting threshold, and the driftage instruction of data processing unit is cancelled; If within this period of time of delay unit time delay, the pressure difference of pressure at both sides sensor or pressure difference still exceed setting threshold, control command is sent to yaw motor by delay unit action, completes driftage.
In practical application, pressure transducer can horizontal symmetrical be arranged in wind wheel main shaft bearing both sides, at least one pressure transducer of every side.When blower fan is normally just moving wind, three blade pitchs of wind wheel are synchronously symmetrical, comprise that propeller pitch angle is identical, space symmetr distribution etc., and wind wheel main shaft bearing pressure at both sides is poor does not need driftage in certain scope time.When pressure at both sides is poor while exceeding certain numerical value, the pressure data detecting is sent to data processing unit by pressure at both sides sensor, data processing unit compares both sides pressure data, in the time that left side pressure is bigger than normal, data processing unit sends the instruction of driftage to the right, through the delay unit time delay regular hour, to prevent the contingencies such as fitful wind.If within this period of time, the pressure difference of pressure at both sides sensor turns back to normal value, and data processing unit is cancelled driftage instruction; If within this period of time, the pressure difference of two side sensers still exceedes certain numerical value, delay unit action, and driftage instruction sends to yaw motor, completes driftage; In the time that right side pressure is bigger than normal, data processing unit sends the instruction to left drift, through the delay unit time delay regular hour, to prevent the contingencies such as fitful wind.If within this period of time, the pressure difference of two side sensers turns back to normal value, and data processing unit is cancelled driftage instruction; If within this period of time, the pressure difference of two side sensers still exceedes certain numerical value, delay unit action, and driftage instruction sends to yaw motor, completes driftage.
In sum, fan yaw system of the present invention and driftage method, by the pressure transducer and the data processing unit that arrange, the side pressure that while utilizing blower fan not aim at wind direction, bear wind wheel bearing both sides and/or pressure poor, send accurately control command to yaw motor, make blower fan aim at wind direction, thus Star arrived precision higher, detect sensitiveer driftage to wind effect.Further, by delay unit is set, control command is carried out to time delay, prevent the driftage erroneous judgement under the contingencies such as fitful wind in conjunction with the difference of the pressure in delay time section and/or pressure simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (9)
1. a fan yaw system, is characterized in that, comprising: blower fan, pressure transducer, data processing unit and yaw motor; Pressure and/or pressure information that described pressure transducer bears for gathering the main shaft bearing both sides of described blower fan, described data processing unit drives described blower fan to go off course to wind according to yaw motor described in described pressure and/or pressure information control.
2. fan yaw system as claimed in claim 1, is characterized in that, described pressure transducer is positioned at the wind wheel main shaft bearing both sides of described blower fan, and horizontal symmetrical is arranged.
3. fan yaw system as claimed in claim 2, is characterized in that, every side of described wind wheel main shaft bearing is provided with at least one pressure transducer.
4. fan yaw system as claimed in claim 1, is characterized in that, described data processing unit comprises:
One for calculating the first computing element of the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
One comparing element comparing for pressure difference that described the first computing element is obtained and/or pressure difference and a setting threshold;
One for calculating the wind wheel axis deviation of directivity value of wind direction and blower fan and determine whether to need the second computing element of driftage adjusted value to wind to wind and driftage according to described deviate according to described pressure difference and/or pressure difference and described setting threshold;
One for the PLC controller to described yaw motor output control command according to the result of calculation of described the second computing element.
5. the fan yaw system as described in any one in claim 1 to 4, it is characterized in that, described fan yaw system also comprises a delay unit, described data processing unit produces for controlling the control command of described yaw motor after receiving described pressure and/or pressure information, and described control command is sent to described yaw motor place after delay unit time delay.
6. fan yaw system as claimed in claim 5, it is characterized in that, described fan yaw system also comprise one with the coaxial driftage plane table thermoconductivity meter connecting of described yaw motor, described yaw motor drives wind wheel to go off course to wind by described driftage plane table thermoconductivity meter.
7. a fan yaw method, is characterized in that, comprises the following steps:
Be provided for gathering pressure that blower fan bears and/or the pressure transducer of pressure information in the main shaft bearing both sides of a blower fan, the data processing unit that is provided for processing described pressure and/or pressure information simultaneously and controls the yaw motor of described blower fan;
Pressure and/or the pressure information of blower fan main shaft bearing both sides described in described pressure transducer Real-time Collection, described data processing unit is processed described pressure and/or pressure information in real time;
In the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference does not exceed a setting threshold, yaw motor is not worked;
In the time that described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference exceedes described setting threshold, described data processing unit drives described fan yaw according to stating yaw motor described in the poor and/or pressure difference control of wind wheel main shaft bearing pressure at both sides, until described wind wheel main shaft bearing pressure at both sides is poor and/or pressure difference again drops to described setting threshold and just stops below driftage.
8. fan yaw method as claimed in claim 7, is characterized in that, the step that described data processing unit is processed described pressure and/or pressure information in real time comprises:
Calculate the pressure difference of described wind wheel main shaft bearing both sides according to the pressure of described wind wheel main shaft bearing both sides and/or pressure information;
The pressure difference that described the first computing element is obtained and/or pressure difference and a setting threshold compare, to determine whether needing driftage to wind;
Calculate the wind wheel axis deviation of directivity value of wind direction and blower fan according to described pressure difference and/or pressure difference and described setting threshold, to determine the adjusted value of driftage to wind;
Export control command according to described adjusted value to described yaw motor.
9. fan yaw method as claimed in claim 7 or 8, is characterized in that, the instruction to opposite side driftage that described data processing unit sends is sent to described yaw motor after a delay unit time delay.
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| CN201410138313.3A CN103899481A (en) | 2014-04-08 | 2014-04-08 | Wind turbine yaw system and method |
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| CN201410138313.3A CN103899481A (en) | 2014-04-08 | 2014-04-08 | Wind turbine yaw system and method |
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| US5099686A (en) * | 1989-07-18 | 1992-03-31 | Nord-Micro-Elektronik Feinmechanik Ag | Sensor and method for measuring the relative velocity of an oncoming medium |
| CN101725468A (en) * | 2008-10-28 | 2010-06-09 | 西门子公司 | Wind turbine arrangement and method for aligning a wind turbine with the wind direction |
| CN102562460A (en) * | 2011-12-29 | 2012-07-11 | 燕山大学 | Undamped hydraulic yaw system based on pressure detection and control method of undamped hydraulic yaw system |
| CN102926933A (en) * | 2011-08-13 | 2013-02-13 | 鲁小和 | Suspension type horizontal-axis wind generator with buoyancy force overcoming force of gravity and elastic force |
| US20130272877A1 (en) * | 2012-04-17 | 2013-10-17 | Jimmi Andersen | Wind turbine measurement system |
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2014
- 2014-04-08 CN CN201410138313.3A patent/CN103899481A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099686A (en) * | 1989-07-18 | 1992-03-31 | Nord-Micro-Elektronik Feinmechanik Ag | Sensor and method for measuring the relative velocity of an oncoming medium |
| CN101725468A (en) * | 2008-10-28 | 2010-06-09 | 西门子公司 | Wind turbine arrangement and method for aligning a wind turbine with the wind direction |
| CN102926933A (en) * | 2011-08-13 | 2013-02-13 | 鲁小和 | Suspension type horizontal-axis wind generator with buoyancy force overcoming force of gravity and elastic force |
| CN102562460A (en) * | 2011-12-29 | 2012-07-11 | 燕山大学 | Undamped hydraulic yaw system based on pressure detection and control method of undamped hydraulic yaw system |
| US20130272877A1 (en) * | 2012-04-17 | 2013-10-17 | Jimmi Andersen | Wind turbine measurement system |
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Application publication date: 20140702 |