CN202117846U - Independent variable-pitch control device for large wind turbines - Google Patents
Independent variable-pitch control device for large wind turbines Download PDFInfo
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- CN202117846U CN202117846U CN2011201892309U CN201120189230U CN202117846U CN 202117846 U CN202117846 U CN 202117846U CN 2011201892309 U CN2011201892309 U CN 2011201892309U CN 201120189230 U CN201120189230 U CN 201120189230U CN 202117846 U CN202117846 U CN 202117846U
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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
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- 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 utility model provides an independent variable-pitch control device for large wind turbines, wherein an independent variable-pitch control for wind turbines is realized by measuring the main shaft load of a fan and the azimuth angle of a wind wheel to obtain the horizontal-axis bending moment and the vertical-axis bending moment of a wheel hub on fixed coordinate system. In the utility model, the measurement for the main shaft load is realized by installing optical fibre strain transducers on the main shaft only, which can reduce the quantity of the optical fibre strain transducers. Moreover, the main shaft has no movement relative to the wheel hub, so that the measurement and signal transmission are relatively simple, as well as are good for enhancing the reliability of the load signal. Therefore, the cost can be decreased due to the few transducers applied by the device provided by the utility model, and the measurement proposal needed by the main shaft fixation is simple and easy to realize; the measurement result is exact, the reliability is high, and the control effect is more ideal because of no long delay.
Description
Technical field
The utility model relates to technical field of wind power generation, particularly a kind of large-scale wind electricity unit independent feathering control device.
Background technique
At present, the large-scale wind electricity unit generally all adopts the collaborative change oar control technique of drive.The collaborative change oar control technique of drive is: control through the collaborative oar that becomes, when blower fan is shut down, aerodynamic brake is provided.When being lower than rated wind speed, controlling each blade clock and be near the best pitch angle, to realize maximum energy capture.When being higher than rated wind speed,, make generated output power keep stable through propeller pitch angle is regulated.Adopt this Collaborative Control to become the oar technology, what three-vaned change oar drive system obtained is the same position signal, and therefore, it also is identical that three-vaned pitch angle changes.
But; In the blower fan actual motion, because the existence of factors such as wind shear, wind turbulent flow, tower shadow effect, driftage deviation, the wind speed profile that can cause wind wheel to sweep in the wind face is inhomogeneous; To such an extent as to cause that the suffered load of impeller is unbalanced; And rotor diameter is big more, and it is just strong more that whole wind wheel is swept the stressed unbalanced degree of wind face, and unbalanced load is also just obvious more on the impeller.Unbalanced load on the impeller causes very big fatigue load can for blower fan critical components such as pitch variable bearings, wheel hub, main shaft, driftage bearing, pylon.And the collaborative change oar control technique that adopts can not reduce the unbalanced load on the impeller.According to theory analysis,, then can reduce the unbalanced load on the impeller if can carry out independent feathering control to each blade according to blower fan stand under load situation.
At present, realize wind-powered electricity generation unit independent feathering control common following two kinds of methods are arranged:
(1) first method is only to pass through to measure the wind wheel azimythal angle, and the propeller pitch angle of each blade is adjusted according to wind wheel azimuth function relation, realizes each blade independent feathering control.
This method for reduce some specific effect factors (tilting) like wind shear, tower shadow effect, wind wheel to cause the unbalanced load on the impeller be effective; But in the actual wind field; The change at random that turbulent flow causes is occupied an leading position, thus be difficult to the effect of realizing ideal through this approach, particularly for large-scale blade; Suitable pitch angle is different with the variation meeting of leaf position, so more excellent control effect is difficult to reach.
(2) second method is through measuring three propeller shank load and wind wheel azimythal angle, realizing independent feathering control.This method can effectively reduce the unbalanced load of wind wheel.
But there is following several respects shortcoming: a) in order to guarantee the reliability of load measurement; Measure propeller shank load and generally all adopt expensive fiber optic strain sensor; And three propeller shanks need to install 24 fiber optic strain sensors (wherein 12 is as the temperature correction sheet) altogether, therefore need to increase more hardware cost; B) the fiber-optic signal collecting device generally is installed in the wheel hub; And blade is when unit operation; Need become the oar action, this just causes great difficulty to optical cable wiring (the signal light transmission cable from sensor to the fiber-optic signal collecting device), also can reduce the reliability of load measurement simultaneously; C) because the fiber optic strain sensor signal adopts serial mode to transmit; Therefore; The signals collecting of 24 fiber optic strain sensors needs the long time with transmission; This load signal that can cause collecting has than large time delay property, and independent feathering control is very high to the real-time requirement, and it is very disadvantageous that load signal lags behind.
The model utility content
The technical problem that the utility model will solve provides a kind of large-scale wind electricity unit independent feathering control device, can effectively reduce the unbalanced load of wind wheel, and cost is low simultaneously, reliability is high.
The utility model provides a kind of large-scale wind electricity unit independent feathering control device, comprising:
Be installed on the fiber optic strain sensor of front-end of spindle, be used to measure the main shaft moment M that the wheel hub rotational coordinates of expression main shaft load is fastened
y, M
z
Be installed on the absolute value encoder on the wind-powered electricity generation unit lower velocity shaft, be used to measure wind wheel azimythal angle
Coordinate converter is used for by said M
y, M
zWith
The horizontal axis moment M that acquisition wheel hub fixed coordinates are fastened '
yWith the vertical shaft moment M '
z
The independent feathering control device is used for by M '
yAnd M '
zObtain the expectation propeller pitch angle β of d axle
dWith the expectation propeller pitch angle β on the q axle
qBy β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3
Be installed on the incremental encoder on the generator, be used to measure the rotating speed of generator;
Rotating speed becomes the oar control ring, is used for obtaining the expectation propeller pitch angle by the rotating speed of said generator;
The propeller pitch angle Coupler is used for by said β '
1, β '
2, β '
3Compensate said expectation propeller pitch angle and obtain three expectation propeller pitch angles after the blade compensation;
Variable blade control system is used for the change oar action by independent respectively each blade of control of the expectation propeller pitch angle after the said compensation.
Preferably, said coordinate converter is used for by said M
y, M
zWith
The horizontal axis moment M that acquisition wheel hub fixed coordinates are fastened '
yWith the vertical shaft moment M '
zSpecifically can realize through following formula:
Preferably, the independent feathering control device is used for by β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3Specifically can realize through following formula:
Preferably, the said fiber optic strain sensor that is installed on front-end of spindle is eight, and four fiber optic strain sensors are as the temperature correction sheet; Other four fiber optic strain sensors are used for measuring the main shaft moment M of main shaft load
y, M
zMeasure M
yTwo fiber optic strain sensors of moment of flexure are installed on the place, two ends of front-end of spindle cross section substantially horizontal respectively, measure M
zTwo fiber optic strain sensors of moment of flexure are installed on the place, two ends of front-end of spindle vertical direction respectively.
Preferably, also comprise low-pass filter and the bandstop filter that is connected between said coordinate converter and the independent feathering control device; Said low-pass filter and bandstop filter are with M '
yAnd M '
zCarry out respectively sending to the independent feathering control device behind lower pass-filter and the bandreject filtering.
Preferably, also comprise fiber-optic signal collecting device and slip ring;
The fiber-optic signal collecting device that is installed in the wheel hub is gathered the main shaft moment M that fiber optic strain sensor is measured
y, M
z, and pass through slip ring with said M
y, M
zPass to coordinate converter.
Compared with prior art, the utlity model has following advantage:
The large-scale wind electricity unit independent feathering control device that the utility model provides is to obtain horizontal axis moment of flexure and the vertical shaft moment of flexure that the wheel hub fixed coordinates are fastened through measuring blower fan main shaft load and wind wheel azimythal angle, realizes wind-powered electricity generation unit independent feathering control.The utility model measurement main shaft load only need be installed fiber optic strain sensor and got final product on main shaft, can reduce the quantity of fiber optic strain sensor like this.Measure propeller shank load unlike four fiber optic strain sensors need be set respectively at the root of three blades in the existing technology, need 12 fiber optic strain sensors, in requisition for 12 temperature compensation sensors.And main shaft is with respect to not motion of wheel hub, therefore measures to transmit with signal all to compare simplyr, also helps improving the reliability of load signal.And measure the method for three blades in the existing technology because blade is constantly to become the oar action, therefore measurement and signal transmit equal more complicated.And sensor is many more, and the delay that signal transmission brings is long more, finally causes to measure inaccurately to reduce effect with load and descend.Therefore, the sensor that the device that the utility model provides is used can reduce cost less, and simple easy realization of the fixing measurement scheme that needs of main shaft, because not delay for a long time, so measurement result is more accurate, and reliability is high, and the control effect is better.
Description of drawings
Fig. 1 a is a wheel hub rotating coordinate system schematic representation;
Fig. 1 b is a wheel hub fixed coordinate system schematic representation;
Fig. 2 is independent pitch control method for large wind turbine embodiment one flow chart that the utility model provides;
Fig. 3 is the scheme of installation of fiber optic strain sensor on main shaft that the utility model provides;
Fig. 4 is the working principle block diagram of the independent pitch control method for large wind turbine that provides of the utility model;
Fig. 5 is embodiment's one structural drawing of the large-scale wind electricity unit independent feathering control device that provides of the utility model;
Fig. 6 is embodiment's two structural drawing of the large-scale wind electricity unit independent feathering control device that provides of the utility model.
Embodiment
For above-mentioned purpose, the feature and advantage that make the utility model can be more obviously understandable, the embodiment of the utility model is done detailed explanation below in conjunction with accompanying drawing.
Referring to Fig. 2, this figure is independent pitch control method for large wind turbine embodiment one flow chart that the utility model provides.
The independent pitch control method for large wind turbine that present embodiment provides may further comprise the steps:
S201: the main shaft moment M that the wheel hub rotational coordinates of acquisition expression main shaft load is fastened
y, M
z
Can measure M by the fiber optic strain sensor of installing with front-end of spindle
y, M
z
S202: measure wind wheel azimythal angle
The absolute value encoder measurement
that is installed on the wind-powered electricity generation unit lower velocity shaft can be arranged
S203: by said M
y, M
zWith
By said M
y, M
zWith
Obtain M '
yAnd M '
zSpecifically can realize through following formula (1):
S204: by M '
yAnd M '
zObtain the expectation propeller pitch angle β of d axle
dWith the expectation propeller pitch angle β on the q axle
q
Need to prove, can pass through PID control, linear quadratic side Gauss control (LQG, linear-quadratic-Gaussian optimal control) fuzzy control, optimal control or self adaptive control and obtain β
dAnd β
q
S205: by β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3
By β
dAnd β
qInverse transformation obtains β ' through Park
1, β '
2, β '
3, specifically can realize through following formula (2):
S206: the rotating speed by the generator in the wind-powered electricity generation unit obtains the expectation propeller pitch angle;
Be installed on the rotating speed of the incremental encoder measurement generator on the generator, rotating speed becomes the rotating speed acquisition expectation propeller pitch angle of oar control ring by generator.
S207: by said β '
1, β '
2, β '
3Compensate said expectation propeller pitch angle and obtain three expectation propeller pitch angles after the blade compensation;
S208: by the change oar action of independent respectively each blade of control of the expectation propeller pitch angle after the said compensation.
The independent pitch control method for large wind turbine that the utility model provides obtains horizontal axis moment of flexure and the vertical shaft moment of flexure that the wheel hub fixed coordinates are fastened through measuring blower fan main shaft load and wind wheel azimythal angle.The utility model measurement main shaft load only need be installed fiber optic strain sensor and got final product on main shaft, can reduce the quantity of fiber optic strain sensor like this.Measure propeller shank load unlike four fiber optic strain sensors need be set respectively at the root of three blades in the existing technology, need 12 fiber optic strain sensors, corresponding 12 temperature compensation sensors.And, also help improving the reliability of load signal because main shaft with respect to not motion of wheel hub, is therefore measured to transmit with signal all compares simplyr.And measure the method for three blades in the existing technology because blade is constantly to become the oar action, therefore measurement and signal 0 transmit equal more complicated.And sensor is many more, and the delay that the signal transmission brings is long more, finally causes measurement inaccurate.Therefore, the sensor that the method and apparatus that the utility model provides is used can reduce cost less, and simple easy realization of the fixing measurement scheme that needs of main shaft; Owing to do not postpone for a long time; Therefore measurement result is more accurate, and the control effect is better, and reliability is high.
Referring to Fig. 3, this figure is the scheme of installation of fiber optic strain sensor on main shaft that the utility model provides.
Obtain M through eight fiber optic strain sensors that are installed on front-end of spindle in the present embodiment
yAnd M
zWherein, four fiber optic strain sensors are as the temperature correction sheet; Other four fiber optic strain sensors are used for measuring the main shaft moment M of main shaft load
y, M
zAs shown in Figure 3, the mounting point of measuring four fiber optic strain sensors of main shaft load is specially:
The fiber optic strain sensor at two places, two ends that are installed on front-end of spindle cross section substantially horizontal respectively is used for measuring M shown in 4 among Fig. 3 and 2
yMoment of flexure, the fiber optic strain sensor at two places, two ends that are installed on the front-end of spindle vertical direction respectively is used for measuring M shown in 1 among Fig. 3 and 3
zMoment of flexure.
Need to prove; For the ease of construction and installation; Can be with being attached to measure main shaft load four respectively as four fiber optic strain sensors of temperature correction sheet above the fiber optic strain sensor, two fiber optic strain sensors that stick together look just as a sensor.The all characteristic of two fiber optic strain sensors is just the same.Temperature compensation principle can be utilized full-bridge test philosophy the most frequently used in the measuring technology here.Because temperature compensation principle is used very ripe, do not specify so do not do at this.
The circle on right side is the plan view of A-A direction of the main shaft in left side among Fig. 3.
As can be seen from Figure 3, the utility model has utilized four fiber optic strain sensors just can accurately measure the load of main shaft.And available technology adopting is measured the root load of three blades.Each blade needs four fiber optic strain sensors like this, so just needs 12 fiber optic strain sensors, because the transmission of the signal of sensor is serial, therefore, number of sensors is many more, and the signal transmission delay that causes is long more.Therefore, the application has not only reduced the quantity of sensor, and cost reduces, and signal transmission delay is also short.And blade is constantly to become the oar action, and therefore, measurement and signal transport process are all inconvenient.And the utility model utilizes main shaft with respect to not motion of wheel hub, and the sensor easy mounting is measured like this and signal transmits easy the realization.
Referring to Fig. 4, this figure is the working principle block diagram of the independent pitch control method for large wind turbine that provides of the utility model.
The difference of the controlling method of present embodiment shown in Figure 4 and flow chart shown in Figure 2 is to have increased lower pass-filter step T and bandreject filtering step Z; That is, with M '
yAnd M '
zCarry out respectively sending to controller behind lower pass-filter and the bandreject filtering.
Wherein, the representation of low-pass filter is:
In the formula (3), ω
1Be low-pass filter frequency, ξ
1Be the low-pass filter damping ratio.
Wherein, the representation of bandstop filter is:
In the formula (4), ω
2, ω
3Be bandstop filter frequency, ξ
2, ξ
3Be the bandstop filter damping ratio.
Need to prove, in another embodiment of the utility model, the β that obtains among the S204
dAnd β
qCarry out amplitude limit, with the β behind the amplitude limit
dAnd β
qExport to S205.
Because become the oar execution architecture restriction is arranged, promptly the change oar speed of pitch-controlled system has restriction, and in addition, blower variable-pitch control is at first to realize rotating speed control (or realizing power control), realizes reducing unbalanced load on this basis again.If do not add the amplitude limit link, independent feathering control device output (too big words) can have influence on rotating speed and become oar controller (or power control effect) control effect, realizes rotating speed control (or realizing power control) thereby can not normally accomplish.
Need to prove, after incremental encoder is measured the rotating speed of generator, the rotating speed of measuring is carried out filtering through wave filter.
Based on the controlling method of above-mentioned large-scale wind electricity unit independent pitch, the utility model also provides the control system of large-scale wind electricity unit independent pitch, specifies its constituent element below in conjunction with specific embodiment.
Referring to Fig. 5, this figure is embodiment's one structural drawing of the large-scale wind electricity unit independent feathering control device that provides of the utility model.
The large-scale wind electricity unit independent feathering control device that present embodiment provides comprises:
Be installed on the fiber optic strain sensor 11 of front-end of spindle, be used to measure the main shaft moment M that the wheel hub rotational coordinates of expression main shaft load is fastened
y, M
z
Be installed on the absolute value encoder 13 on the wind-powered electricity generation unit lower velocity shaft, be used to measure the wind wheel azimythal angle
Coordinate converter 14 is used for by said M
y, M
zWith
The horizontal axis moment M that acquisition wheel hub fixed coordinates are fastened '
yWith the vertical shaft moment M '
z
Need to prove, by said M
t, M
zWith
Obtain M '
yAnd M '
zSpecifically can pass through formula (1) realizes.
Independent feathering control device 17 is used for by M '
yAnd M '
zObtain the expectation propeller pitch angle β of d axle
dWith the expectation propeller pitch angle β on the q axle
qBy β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3
Need to prove, by M '
yAnd M '
zObtain the expectation propeller pitch angle β of d axle
dWith the expectation propeller pitch angle β on the q axle
qSpecifically can pass through PID control, linear quadratic side Gauss control (LQG, linear-quadratic-Gaussian optimal control) fuzzy control, optimal control or self adaptive control realizes.
Need to prove, by β
dAnd β
qInverse transformation obtains β ' through Park
1, β '
2, β '
3, specifically can pass through formula (2) and realize.
Be installed on the incremental encoder 5 on the generator, be used to measure the rotating speed of generator;
Rotating speed becomes oar control ring 7, is used for obtaining the expectation propeller pitch angle by the rotating speed of said generator;
Propeller pitch angle Coupler 10 is used for by said β '
1, β '
2, β '
3Compensate said expectation propeller pitch angle and obtain three expectation propeller pitch angles after the blade compensation;
Variable blade control system 9 is used for the change oar action by each blade of the independent respectively control wind-powered electricity generation of the expectation propeller pitch angle after said compensation unit 8.
The large-scale wind electricity unit independent feathering control device that the utility model provides is to obtain horizontal axis moment of flexure and the vertical shaft moment of flexure that the wheel hub fixed coordinates are fastened through measuring blower fan main shaft load and wind wheel azimythal angle, realizes wind-powered electricity generation unit independent feathering control.The utility model measurement main shaft load only need be installed fiber optic strain sensor and got final product on main shaft, can reduce the quantity of fiber optic strain sensor like this.Measure propeller shank load unlike four fiber optic strain sensors need be set respectively at the root of three blades in the existing technology, need 12 fiber optic strain sensors, in requisition for 12 temperature compensation sensors.And main shaft is with respect to not motion of wheel hub, therefore measures to transmit with signal all to compare simplyr, also helps improving the reliability of load signal.And measure the method for three blades in the existing technology because blade is constantly to become the oar action, therefore measurement and signal transmit equal more complicated.And sensor is many more, and the delay that signal transmission brings is long more, finally causes to measure inaccurately to reduce effect with load and descend.Therefore, the sensor that the device that the utility model provides is used can reduce cost less, and measures the simple realization easily of scheme of main shaft load, and owing to do not postpone for a long time, so measurement result is more accurate, and it is better to control effect, and reliability is high.
Referring to Fig. 6, this figure is embodiment's two structural drawing of the large-scale wind electricity unit independent feathering control device that provides of the utility model.
Independent feathering control device that present embodiment provides and difference shown in Figure 5 are:
Between incremental encoder 5 and rotating speed change oar control ring 7, increased wave filter 6, be used for the generator speed that incremental encoder 5 is measured is carried out filtering, filtered generator speed has been sent to rotating speed become oar control ring 7.
Low-pass filter 15 and bandstop filter 16 between coordinate converter 14 and independent feathering control device 17, have been increased successively.
Wherein, low-pass filter 15 is used for the M ' to coordinate converter 14 outputs
yAnd M '
zCarry out lower pass-filter, the M ' behind 16 pairs of lower pass-filters of bandstop filter
yAnd M '
zCarry out bandreject filtering.
Need to prove the representation of low-pass filter such as formula (3), the representation of bandstop filter such as formula (4).
Among another embodiment of the device that the utility model provides, at front-end of spindle eight fiber optic strain sensors are installed and are measured acquisition M
yAnd M
zWherein, four fiber optic strain sensors are as the temperature correction sheet; Other four fiber optic strain sensors are used for measuring the main shaft moment M of main shaft load
y, M
z
Preferably, the mounting point of four fiber optic strain sensors of measurement main shaft load is specially:
Two fiber optic strain sensors that are installed on the place, two ends of front-end of spindle cross section substantially horizontal respectively are used for measuring M
yMoment of flexure; Two fiber optic strain sensors that are installed on the place, two ends of front-end of spindle vertical direction respectively are used for measuring M
zMoment of flexure.
Need to prove; For the ease of construction and installation; Can be with being attached to measure main shaft load four respectively as four fiber optic strain sensors of temperature correction sheet above the fiber optic strain sensor, two fiber optic strain sensors that stick together look just as a sensor.The all characteristic of two fiber optic strain sensors is just the same.Temperature compensation principle can be utilized full-bridge test philosophy the most frequently used in the measuring technology here.Because temperature compensation principle is used very ripe, do not specify so do not do at this.
The utility model has utilized four fiber optic strain sensors just can accurately measure the load of main shaft.And available technology adopting is measured the root load of three blades.Each blade needs four fiber optic strain sensors like this, so just needs 12 fiber optic strain sensors, because the transmission of the signal of sensor is serial, therefore, number of sensors is many more, and the signal transmission delay that causes is long more.Therefore, the application has not only reduced the quantity of sensor, and cost reduces, and signal transmission delay is also short.And blade is constantly to become the oar action, and therefore, measurement and signal transport process are all inconvenient.And the utility model to utilize the relative wheel hub of main shaft be fixed, measure like this with signal and transmit realization easily.
Among another embodiment of independent feathering control device that the utility model provides, also comprise fiber-optic signal collecting device and slip ring;
The fiber-optic signal collecting device that is installed in the wheel hub is gathered the main shaft moment M that fiber optic strain sensor is measured
y, M
z, and pass through slip ring with said M
y, M
zPass to coordinate converter.
The above only is the preferred embodiment of the utility model, is not the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art; Do not breaking away under the utility model technological scheme scope situation; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to the utility model technological scheme, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from the utility model technological scheme, all still belongs in the scope of the utility model technological scheme protection any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.
Claims (6)
1. a large-scale wind electricity unit independent feathering control device is characterized in that, comprising:
Be installed on the fiber optic strain sensor of front-end of spindle, be used to measure the main shaft moment M that the wheel hub rotational coordinates of expression main shaft load is fastened
y, M
z
Be installed on the absolute value encoder on the wind-powered electricity generation unit lower velocity shaft, be used to measure wind wheel azimythal angle
Coordinate converter is used for by said M
y, M
zWith
The horizontal axis moment M that acquisition wheel hub fixed coordinates are fastened '
yWith the vertical shaft moment M '
z
The independent feathering control device is used for by M '
yAnd M '
zObtain the expectation propeller pitch angle β of d axle
dWith the expectation propeller pitch angle β on the q axle
qBy β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3
Be installed on the incremental encoder on the generator, be used to measure the rotating speed of generator;
Rotating speed becomes the oar control ring, is used for obtaining the expectation propeller pitch angle by the rotating speed of said generator;
The propeller pitch angle Coupler is used for by said β '
1, β '
2, β '
3Compensate said expectation propeller pitch angle and obtain three expectation propeller pitch angles after the blade compensation;
Variable blade control system is used for the change oar action by independent respectively each blade of control of the expectation propeller pitch angle after the said compensation.
2. large-scale wind electricity unit independent feathering control device according to claim 1 is characterized in that said coordinate converter is used for by said M
y, M
zWith
The horizontal axis moment M that acquisition wheel hub fixed coordinates are fastened '
yWith the vertical shaft moment M '
zSpecifically can realize through following formula:
3. large-scale wind electricity unit independent feathering control device according to claim 1 is characterized in that the independent feathering control device is used for by β
dAnd β
qInverse transformation obtains the propeller pitch angle offset β ' of three blades through Park
1, β '
2, β '
3Specifically can realize through following formula:
4. large-scale wind electricity unit independent feathering control device according to claim 1 is characterized in that the said fiber optic strain sensor that is installed on front-end of spindle is eight, and four fiber optic strain sensors are as the temperature correction sheet; Other four fiber optic strain sensors are used for measuring the main shaft moment M of main shaft load
y, M
zMeasure M
yTwo fiber optic strain sensors of moment of flexure are installed on the place, two ends of front-end of spindle cross section substantially horizontal respectively, measure M
zTwo fiber optic strain sensors of moment of flexure are installed on the place, two ends of front-end of spindle vertical direction respectively.
5. large-scale wind electricity unit independent feathering control device according to claim 1 is characterized in that, also comprises the low-pass filter and the bandstop filter that are connected between said coordinate converter and the independent feathering control device; Said low-pass filter and bandstop filter are with M '
yAnd M '
zCarry out respectively sending to the independent feathering control device behind lower pass-filter and the bandreject filtering.
6. large-scale wind electricity unit independent feathering control device according to claim 1 is characterized in that, also comprises fiber-optic signal collecting device and slip ring;
The fiber-optic signal collecting device that is installed in the wheel hub is gathered the main shaft moment M that fiber optic strain sensor is measured
y, M
z, and pass through slip ring with said M
y, M
zPass to coordinate converter.
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|---|---|---|---|
| CN2011201892309U CN202117846U (en) | 2011-06-07 | 2011-06-07 | Independent variable-pitch control device for large wind turbines |
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|---|---|---|---|
| CN2011201892309U CN202117846U (en) | 2011-06-07 | 2011-06-07 | Independent variable-pitch control device for large wind turbines |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182633A (en) * | 2011-06-07 | 2011-09-14 | 浙江运达风电股份有限公司 | Independent paddle change control method and device of large-scale wind generator system |
| CN102809422A (en) * | 2012-08-24 | 2012-12-05 | 国电联合动力技术有限公司 | Wind turbine driving system torsional vibration measurement method and device |
| CN103375335A (en) * | 2012-04-12 | 2013-10-30 | 株式会社安川电机 | Power generator and power generating system |
| CN105332856A (en) * | 2015-11-02 | 2016-02-17 | 浙江运达风电股份有限公司 | Wind turbine generator individual variable pitch control method based on measurement of main shaft loads of fixed coordinate system |
| CN105673323A (en) * | 2016-03-08 | 2016-06-15 | 太原重工股份有限公司 | Method, device and system for calibrating variable propeller angle of wind generating unit |
| CN105971822A (en) * | 2016-06-02 | 2016-09-28 | 三重型能源装备有限公司 | Pneumatic balance regulating method, pneumatic balance regulating system and wind driven generator |
| CN108443065A (en) * | 2018-03-06 | 2018-08-24 | 浙江运达风电股份有限公司 | A kind of Large-scale Wind Turbines independent feathering control optimization method |
| CN109139372A (en) * | 2018-08-06 | 2019-01-04 | 大连理工大学 | A kind of Wind turbines control and braking method based on independent pitch |
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2011
- 2011-06-07 CN CN2011201892309U patent/CN202117846U/en not_active Expired - Lifetime
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| CN102182633A (en) * | 2011-06-07 | 2011-09-14 | 浙江运达风电股份有限公司 | Independent paddle change control method and device of large-scale wind generator system |
| CN102182633B (en) * | 2011-06-07 | 2013-07-24 | 浙江运达风电股份有限公司 | Independent paddle change control method and device of large-scale wind generator system |
| CN103375335A (en) * | 2012-04-12 | 2013-10-30 | 株式会社安川电机 | Power generator and power generating system |
| CN102809422A (en) * | 2012-08-24 | 2012-12-05 | 国电联合动力技术有限公司 | Wind turbine driving system torsional vibration measurement method and device |
| CN102809422B (en) * | 2012-08-24 | 2014-04-02 | 国电联合动力技术有限公司 | Wind turbine driving system torsional vibration measurement method and device |
| CN105332856A (en) * | 2015-11-02 | 2016-02-17 | 浙江运达风电股份有限公司 | Wind turbine generator individual variable pitch control method based on measurement of main shaft loads of fixed coordinate system |
| CN105673323A (en) * | 2016-03-08 | 2016-06-15 | 太原重工股份有限公司 | Method, device and system for calibrating variable propeller angle of wind generating unit |
| CN105673323B (en) * | 2016-03-08 | 2018-03-13 | 太原重工股份有限公司 | A kind of wind generating set pitch control angle calibration method, apparatus and system |
| CN105971822A (en) * | 2016-06-02 | 2016-09-28 | 三重型能源装备有限公司 | Pneumatic balance regulating method, pneumatic balance regulating system and wind driven generator |
| CN105971822B (en) * | 2016-06-02 | 2018-08-17 | 三一重型能源装备有限公司 | Air-balance adjusting method, air-balance regulating system and wind-driven generator |
| CN108443065A (en) * | 2018-03-06 | 2018-08-24 | 浙江运达风电股份有限公司 | A kind of Large-scale Wind Turbines independent feathering control optimization method |
| CN109139372A (en) * | 2018-08-06 | 2019-01-04 | 大连理工大学 | A kind of Wind turbines control and braking method based on independent pitch |
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