CN102011697A - Wind turbine pitch system - Google Patents
Wind turbine pitch system Download PDFInfo
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- CN102011697A CN102011697A CN2010105817400A CN201010581740A CN102011697A CN 102011697 A CN102011697 A CN 102011697A CN 2010105817400 A CN2010105817400 A CN 2010105817400A CN 201010581740 A CN201010581740 A CN 201010581740A CN 102011697 A CN102011697 A CN 102011697A
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- pitch
- controlled system
- wind power
- oar motor
- rotary transformer
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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 provides a wind turbine pitch system, which comprises at least one blade, pitch motors, pitch drivers and a pitch-motor measuring device, wherein the pitch motors are correspondingly connected with the blades and used for adjusting the angles of corresponding blades; the pitch drivers are correspondingly connected with the pitch motors, and used for controlling the actions of the pitch motors; and the pitch-motor measuring device is used for monitoring the speeds and positions of the pitch motors, and the pitch-motor measuring device is a rotary transformer. The wind turbine pitch system of the invention has the beneficial effects: through taking the rotary transformer as the pitch-motor measuring device, the environment adaptability and reliability of a speed and position measuring device in the pitch system are improved; and through an optimized detection circuit, the accuracy of measurement is improved; and meanwhile, the rotary transformer can replace a tachometer generator and an absolute encoder, or an incremental absolute encoder, thereby reducing the cost.
Description
Technical field
The present invention relates to a kind of wind power pitch-controlled system, relate in particular to the change oar motor measuring device of wind power pitch-controlled system.
Background technique
Along with non-renewable energy resources face exhausted awkward situation at world wide, for satisfying industrialized production and the human lives is required, people are to the concern of solar energy, wind-force, these renewable energy sourcess of waterpower and utilize day by day and promote.Wherein, wind-power electricity generation is a kind of relatively ripe energy development technology that developed, as the emphasis of China's new energy development strategy.
Wind-driven power generation control system requires to have stronger adaptive capacity to environment.Wind power pitch-controlled system is one of core component of wind-power electricity generation, and main effect is the angle that changes the wind power generating set blade according to the size of wind-driven generator output power, guarantees that wind-driven generator output is in rated power.Wind power pitch-controlled system is installed in the wheel hub of wind power generating set, rotates with wheel hub during work.Therefore require pitch-controlled system not only stronger adaptive capacity to environment will be arranged, also require certain shock-resistant and shock resistance.Simultaneously, for guaranteeing the efficient of wind-driven generator, pitch-controlled system is had relatively high expectations to control accuracy, needs to guarantee to become the precision of oar motor speed and position measurement.
The method of measurement of wind power pitch-controlled system medium velocity and position adopts tachometer generator to add absolute value encoder at present mostly, or increment type adds absolute value encoder.What tachometer generator was exported is analog signals, and its adaptive capacity to environment and antijamming capability are stronger, but precision is relatively poor, and has increased the size of motor, and pitch-controlled system requires the size of motor as far as possible little, is restricted more in high-power pitch-controlled system.The employing incremental encoder tests the speed, and its advantage is resolution height, precision height.Its shortcoming is to be subjected to influence of temperature change easily, not shock-resistant and vibrations, and adaptive capacity to environment is relatively poor.
Summary of the invention
At the deficiencies in the prior art, the object of the invention is to provide a kind of change oar precise and stable, the wind power pitch-controlled system that cost is low.
For solving the problems of the technologies described above, technological scheme of the present invention is achieved in that a kind of wind power pitch-controlled system, comprises at least one blade; Be connected one to one with described blade, regulate the change oar motor of corresponding blade angle; Be connected one to one with described change oar motor, control becomes the variable pitch driver of oar motor action; Monitoring becomes the speed of oar motor and the change oar motor measuring device of position, and described change oar motor measuring device is rotary transformer.
Preferably, described rotary transformer is a sine and cosine resolver.
Preferably, also comprise the testing circuit that connects described rotary transformer.
Preferably, described testing circuit comprises analog sampling circuit and comparison circuit.
Preferably, described testing circuit comprises anti-twitter circuit.
Preferably, have the CAN communication interface on described main control unit and the variable pitch driver respectively, the CAN communication interface of described main control unit and the CAN communication interface of variable pitch driver use the CAN bus to be connected.
Preferably, described variable pitch driver comprises that record becomes the storage of this running position of oar motor.
Preferably, described variable pitch driver connects outside power supply, and variable pitch driver also is included in the working power of discharging when described power supply cuts off the power supply.
Preferably, the quantity of described blade is 3.
Compared with prior art, the invention has the beneficial effects as follows:, improved the adaptive capacity to environment and the reliability of pitch-controlled system medium velocity and position-measurement device by adopting rotary transformer as the speed that becomes the oar motor and the measuring device of position.And improved the precision of measuring by the testing circuit of optimizing.Simultaneously, substituted tachometer generator with rotary transformer and added absolute value encoder, or increment type adds absolute value encoder, cost is reduced.
Description of drawings
Fig. 1 is the schematic representation of analog sampling circuit of the present invention.
Fig. 2 is the schematic representation of comparison circuit of the present invention.
Fig. 3 is the schematic representation of anti-twitter circuit of the present invention.
Embodiment
Mode with example describes the specific embodiment of the present invention with reference to the accompanying drawings.
The wind power pitch-controlled system of embodiment comprises blade, becomes oar motor, variable pitch driver and main control unit.
Blade needs 1 at least, is generally 3, change oar motor of regulating this blade angle of the connection of each blade correspondence; Each becomes the variable pitch driver of this change oar motor action of control of connection of oar motor correspondence; Wind power pitch-controlled system also comprises main control unit, and its connection is also controlled each variable pitch driver.
The wind-force pitch-controlled system also comprises change oar motor measuring device, is used to monitor speed and the position that becomes the oar motor, and for the variable pitch driver reference, control becomes oar motor action adjusting blade.Change oar motor measuring device of the present invention is rotary transformer.
Rotary transformer is a kind of accurate angle, position, speed detector, and it is not afraid of jerk, and is high temperature resistant, and adaptive capacity to environment is very strong, and its resolution and measuring accuracy can change by control circuit and software algorithm.Rotary transformer is specially a kind of electromagnetic sensor, and a kind of small-sized Wechselstrommotor of the usefulness that takes measurement of an angle is used for measuring the rotating shaft angular travel and the angular velocity of rotating object, is made up of stator and rotor.Wherein staor winding is as exciting winding.The rotor winding obtains induced voltage as the secondary of transformer by electromagnetic coupling, and the size of its output voltage changes with rotor angular displacement, and the voltage magnitude of output winding becomes the sin cos functions relation with angle of rotor.Because the harmonic component of cosine and sine signal is little, antijamming capability is stronger, so adopts the sine and cosine resolver in the rotary transformer in the present embodiment.
It may be noted that variable pitch driver is connected with the externally fed power supply, and variable pitch driver comprises storage and working power.Rotary transformer can only write down the individual pen position, for this reason, need write down the position of this operation in variable pitch driver, is stored in the aforesaid storage (ROM).And even the power supply sudden power of driver, because the working power of driver is longer discharge time, this moment, variable pitch driver still can write down the position of this operation.So just solved the measurement problem of multi-turn position in the pitch-controlled system.
Rotary transformer also comprises testing circuit, main analog sampling circuit of testing circuit and comparison circuit.Respectively as depicted in figs. 1 and 2.It is noted that the testing circuit of the positive string section that only draws among Fig. 1 and Fig. 2, the testing circuit of cosine part is identical with it, draws no longer separately.
The analog sampling circuit of rotary transformer is concrete as Fig. 1, mainly is the sine and cosine value of sampling rotary transformer output, adopts the high-performance amplifier, and adds the filtering link, selects suitable parameters for use, can improve sampling precision.The output comparison circuit of rotary transformer is concrete as Fig. 2, and it inserts four comparison point by comparator with the sine and cosine output of a circle, and each comparison point can be carried out position and velocity correction, has avoided adding up sampling error.
For further improving precision, the testing circuit of this specific embodiment also comprises an anti-twitter circuit, specifically as shown in Figure 3.When inserting the zero passage comparison point,, can cause shake and skew that comparison point is inserted because can there be error in the SIN and the COS analogue value of rotary transformer output.Utilize the CLK signal of the phase difference (as shown in Figure 2) of SIN+ and SIN-comparison signal generation as d type flip flop, go to beat the B phase signals, at this moment B overturns mutually certainly.In like manner, utilize phase difference that the comparison signal of COS+ and COS-produces CLK signal, go to beat the A phase signals as d type flip flop.So just eliminate the shake of comparison point, reduced the climbing time of insertion point rising edge simultaneously, improved sampling precision.
Although be the example purpose, preferred implementation of the present invention is disclosed, but those of ordinary skill in the art will recognize that under situation about not breaking away from by the disclosed scope and spirit of the present invention of appending claims, various improvement, increase and replacement are possible.
Claims (8)
1. a wind power pitch-controlled system comprises,
At least one blade;
Be connected one to one with described blade, regulate the change oar motor of corresponding blade angle;
Be connected one to one with described change oar motor, control becomes the variable pitch driver of oar motor action;
Monitoring becomes the speed of oar motor and the change oar motor measuring device of position, it is characterized in that:
Described change oar motor measuring device is rotary transformer.
2. according to the wind power pitch-controlled system described in the claim 1, it is characterized in that: described rotary transformer is a sine and cosine resolver.
3. according to the wind power pitch-controlled system described in the claim 1, it is characterized in that: also comprise the testing circuit that connects described rotary transformer.
4. according to the wind power pitch-controlled system described in the claim 3, it is characterized in that: described testing circuit comprises analog sampling circuit and comparison circuit.
5. according to the wind power pitch-controlled system described in the claim 3, it is characterized in that: described testing circuit comprises anti-twitter circuit.
6. according to the wind power pitch-controlled system described in the claim 1, it is characterized in that: described variable pitch driver comprises that record becomes the storage of this running position of oar motor.
7. according to the wind power pitch-controlled system described in the claim 1, it is characterized in that: described variable pitch driver connects outside power supply, and variable pitch driver also is included in the working power of discharging when described power supply cuts off the power supply.
8. according to the wind power pitch-controlled system described in the claim 1, it is characterized in that: the quantity of described blade is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105817400A CN102011697A (en) | 2010-12-10 | 2010-12-10 | Wind turbine pitch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105817400A CN102011697A (en) | 2010-12-10 | 2010-12-10 | Wind turbine pitch system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102011697A true CN102011697A (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105817400A Pending CN102011697A (en) | 2010-12-10 | 2010-12-10 | Wind turbine pitch system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251924A (en) * | 2011-06-17 | 2011-11-23 | 大连尚能科技发展有限公司 | System for confirming propeller blade position of wind turbine and system for controlling variable propeller pitch |
| CN103166609A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Comparison circuit of rotary transformer |
| CN103161665A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Anti-shake circuit of variable pitch motor |
| CN103166608A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Analog sampling circuit of wind power variable propeller motor measurement device |
| CN106050562A (en) * | 2016-07-21 | 2016-10-26 | 江阴弘远新能源科技有限公司 | Wind power generation pitch-regulating control system |
| CN110428691A (en) * | 2019-09-17 | 2019-11-08 | 固安华电天仁控制设备有限公司 | A kind of blower variable-pitch teaching simulating device |
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| CN1825054A (en) * | 2006-02-20 | 2006-08-30 | 连云港杰瑞电子有限公司 | Double speed angle-digital converter |
| CN101725834A (en) * | 2008-10-24 | 2010-06-09 | 中国石油天然气管道局 | Magnetic sensor for pipeline crawling device |
| JP2010187491A (en) * | 2009-02-13 | 2010-08-26 | Mitsuba Corp | Brushless motor |
| CN101908810A (en) * | 2009-06-05 | 2010-12-08 | 苏州能健电气有限公司 | Direct current brushless motor for variable pitch propeller of wind-driven generator and driving system thereof |
| CN201925092U (en) * | 2010-12-10 | 2011-08-10 | 苏州能健电气有限公司 | Wind turbine pitch control system |
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2010
- 2010-12-10 CN CN2010105817400A patent/CN102011697A/en active Pending
Patent Citations (5)
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| CN1825054A (en) * | 2006-02-20 | 2006-08-30 | 连云港杰瑞电子有限公司 | Double speed angle-digital converter |
| CN101725834A (en) * | 2008-10-24 | 2010-06-09 | 中国石油天然气管道局 | Magnetic sensor for pipeline crawling device |
| JP2010187491A (en) * | 2009-02-13 | 2010-08-26 | Mitsuba Corp | Brushless motor |
| CN101908810A (en) * | 2009-06-05 | 2010-12-08 | 苏州能健电气有限公司 | Direct current brushless motor for variable pitch propeller of wind-driven generator and driving system thereof |
| CN201925092U (en) * | 2010-12-10 | 2011-08-10 | 苏州能健电气有限公司 | Wind turbine pitch control system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251924A (en) * | 2011-06-17 | 2011-11-23 | 大连尚能科技发展有限公司 | System for confirming propeller blade position of wind turbine and system for controlling variable propeller pitch |
| CN102251924B (en) * | 2011-06-17 | 2013-04-24 | 大连尚能科技发展有限公司 | System for confirming propeller blade position of wind turbine and system for controlling variable propeller pitch |
| CN103166609A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Comparison circuit of rotary transformer |
| CN103161665A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Anti-shake circuit of variable pitch motor |
| CN103166608A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Analog sampling circuit of wind power variable propeller motor measurement device |
| CN106050562A (en) * | 2016-07-21 | 2016-10-26 | 江阴弘远新能源科技有限公司 | Wind power generation pitch-regulating control system |
| CN106050562B (en) * | 2016-07-21 | 2019-09-10 | 江阴弘远新能源科技有限公司 | A kind of wind generating variable-propeller control system |
| CN110428691A (en) * | 2019-09-17 | 2019-11-08 | 固安华电天仁控制设备有限公司 | A kind of blower variable-pitch teaching simulating device |
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Application publication date: 20110413 |