CN109209784A - A kind of efficient wind generator system and its control method - Google Patents
A kind of efficient wind generator system and its control method Download PDFInfo
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- CN109209784A CN109209784A CN201811157054.3A CN201811157054A CN109209784A CN 109209784 A CN109209784 A CN 109209784A CN 201811157054 A CN201811157054 A CN 201811157054A CN 109209784 A CN109209784 A CN 109209784A
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000001360 synchronised effect Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000004146 energy storage Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 abstract 1
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- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D15/00—Transmission of mechanical power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0264—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
- F03D7/0268—Parking or storm protection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of efficient wind generator system and its control methods comprising the laser radar anemometer being placed in cabin, mechanical-hydraulic (Secondary Control) hybrid powertrain system being placed in cabin；The mechanical-hydraulic hybrid powertrain system includes impeller, speedup planetary gear, confluence device, synchronous generator, speed-regulating hydraulic system and secondary regulation system；The impeller is connected with the input shaft of the speedup planetary gear train；The confluence device includes secondary first gear, planetary gear and second gear pair；The planetary gear includes planet carrier, sun gear and gear ring；The speed-regulating hydraulic system includes volume adjustable hydraulic pump, constant displacement hydraulic motor and fuel tank；The secondary regulation system includes secondary component and accumulator；The secondary component is coaxially connected with fixed displacement motor.The laser radar anemometer makes wind generator system high-efficient by wind signal processing with mechanical-hydraulic hybrid powertrain system with corresponding control action, and output power is smooth.
Description
Technical field
The invention belongs to new energy resources system fields, and in particular to a kind of efficient wind generator system and its controlling party
Method.
Background technique
World energy consumption amount continues to increase, and keeps the energy crisis in global range more obvious, develops renewable energy
Source has become the important measure of countries in the world energy development with the sustainable development of alleviating energy crisis, the realization energy.Wind energy because
Reserves worldwide are huge, renewable, wide, the free of contamination characteristic of distribution, and wind-power electricity generation is made to become world energy sources hair
The important directions of exhibition.In recent years, the installed capacity of Global Wind Power Industry machine was about increased every year on average with 30% speed.China makees
For the main state of fossil energy consumption, in the case where facing Heavy environmental pollution crisis brought by fossil fuel power, wind energy conduct
A kind of new energy has important Utilization prospects.But the utilization efficiency of wind energy is too low, becomes the bottleneck for restricting its development.Cause
This improve wind energy utilization efficiency it is particularly significant, it is desirable that wind energy related researcher, develop and use new system, using new technology,
New element improves wind energy utilization efficiency.
The method of wind energy utilization efficiency is improved at present mainly include the following types: (1) optimizes structure and the position of wind-driven generator
It sets；(2) intelligence control system is utilized；(3) proper use of blower lubricating oil.
104696170 A of Chinese patent CN discloses a kind of mixed drive wind generator system, utilizes mixed drive skill
Art, the advantage that comprehensive mechanical transmission efficiency is higher, hydraulic drive gear ratio and torque are smooth, can reach so that fluctuating torque by
Hydraulic system transfers, gear parts transmit steady torque, to achieve the effect that reduce gearbox fault rate.Simultaneously because hydraulic
The variable transmission velocity ratio characteristic of system, the frequency converter of traditional wind power system can be omitted.Both the above effect can substantially reduce system
Failure rate reduces diagnosis and the maintenance time of wind power system failure, to improve the total electric energy output of system.But it has been investigated that
This system is due to introducing hydraulic system to make the purer gear drive of system effectiveness have reduction, although while simple hydraulic system
Can control fluctuating torque and do not pass through gear train, but this fluctuation cannot complete self-digestion, be eventually transferred to master section,
System output power has fluctuation.
Summary of the invention
The object of the present invention is to provide one kind using laser radar anemometer as wind measuring system, mechanical-hydraulic Secondary Control
Hybrid powertrain system forms a kind of high-efficient, output work with corresponding control program as main transmission, by data processing
The low wind generator system of counting smooth, system failure rate.
To achieve the above object, present invention employs the following technical solutions:
A kind of efficient wind generator system, including impeller, blade pitch device, synchronous generator, and by speedup planet
The hybrid powertrain system that train, confluence device and speed-regulating hydraulic system are constituted, further includes laser radar anemometer, control device
With secondary regulation hydraulic system；
The impeller is connected with the input shaft of the speedup planetary gear train, and the confluence device includes first gear
Secondary, planetary gear and second gear pair, the first gear pair include the first gear and second gear being meshed, the planet
Gear includes planet carrier, sun gear, planetary gear and gear ring, and the second gear pair includes the third gear and the 4th tooth being meshed
Wheel, the speed-regulating hydraulic system are closed hydraulic loop, including volume adjustable hydraulic pump and constant displacement hydraulic motor, the secondary hydraulic tune
Section system includes Secondary Control element and accumulator；
The first gear is connected with the output shaft of the speedup planetary gear train and planet carrier respectively, second gear with
The volume adjustable hydraulic pump is connected, and third gear is an integral structure with the gear ring and can synchronous rotary, the 4th gear and institute
It states constant displacement hydraulic motor to be connected, the sun gear is connected with the synchronous generator；The Secondary Control element with it is described
Constant displacement hydraulic motor is coaxially connected, and exit portion connects the accumulator, and the control device is electrically connected the laser
Radar sonde, blade pitch device, volume adjustable hydraulic pump and Secondary Control element are obtained for receiving and processing laser radar survey wind number
To smooth wind power curve, and control based on the smooth wind power curve row of the volume adjustable hydraulic pump and Secondary Control element
Amount is to adjust load torque control generator power, and control blade pitch device adjusts impeller and captures power.
Further, the Secondary Control element is hydraulic motor/pump, changes working condition by electrohydraulic servo valve and controls
Its discharge capacity is made, the working condition includes pump condition or motor operating conditions.
Further, the Secondary Control element manipulation recovers energy to system and is stored by accumulator when pump condition；When
When secondary component works in motor operating conditions, the energy of accumulator storage is discharged to system, is improved energy utilization rate and is smoothly exported
Power.
The present invention also provides a kind of efficient wind generator system control methods, include the following steps:
S1, laser radar anemometer acquisition wind data are simultaneously sent to control device progress data processing；
S2, control device give wind energy conversion system control target in conjunction with operating condition according to data processed result；
S3, it is based on system running state ,+the feedback control that feedovers is carried out according to the control target, is specifically included:
When wind speed is below rated wind speed, hybrid powertrain system combination secondary regulation hydraulic system controls wind energy conversion system tracking
Control target given curve；
When wind speed is more than rated wind speed, blade pitch device adjusts impeller capture power and is reduced near rated power, together
When hybrid powertrain system volume adjustable hydraulic pump it is given by rated power, and power smooth is controlled by secondary regulation hydraulic system.
Further, S1 is specifically included:
S11, laser radar anemometer measurement wind speed information at L in front of impeller, are adopted based on what systematic sampling rate determined
The sample time obtains a data with Fixed Time Interval and passes control device back；
S12, M data queue memory is set in control device, each column stores N number of sampled data, and sampled data is pressed
The principle of first in first out enters queue, carries out in next step after data are booked in queue；
S13, according to survey wind error source preliminary treatment sampled data, rolling average carry out once fitting continuously fluctuated
Wind speed curve v1d；
S14, quadratic polynomial fitting is carried out to M*N sampled data in queue, it is bent is fitted to a smooth wind speed
Line, Real-time solution mean wind speed v2d。
Further, S2 is specifically included:
S21, when wind speed be located at incision wind speed below when, wind energy conversion system is failure to actuate, keep original state；
S22, when wind speed is located at incision wind speed between rated wind speed, by quadratic fit wind speed curve, give generator
PowerAnd it is poor based on the generator power between once fitting and quadratic fit wind speed curve
ValueDetermine control of the control target to carry out corresponding energy storage or release energy:
S23, when wind speed is located at rated wind speed or more, generator power is given as the rated power P of systemratedBy variable
Motor is controlled；Pitch control mechanism power given value is quadratic fit curve wind speed v2dWith rated wind speed vratedBetween function
Rate difference DELTA P calculates gained power differenceBased on the difference power
Value Δ P determines that control target to carry out corresponding pitch control, to reduce variable pitch movement, protects blade pitch device；It is based on one simultaneously
Generator power difference between secondary fitting and quadratic fit wind speed curveIt determines
Control of the target to carry out corresponding energy storage or release energy is controlled, thus smooth output power；
S24, when wind speed is located at cut-out wind speed or more, off-grid, feathering.
Further, in S22 and S23, control target is determined based on power difference to carry out corresponding energy storage or release energy
The control of amount specifically includes:
When power difference is that timing carries out energy storage movement, control Secondary Control element is used as pump to use, so that accumulator
Store corresponding energy；When power difference is negative, control Secondary Control element is used as motor, and accumulator is made to pass through secondary tune
It saves element and discharges corresponding energy to system, auxiliary variable pump control is so that output power is smooth.
Control method of the invention, when below rated wind speed, variable pump is flat according to quadratic fit in hybrid powertrain system
Sliding curve controls electricity generation system, and Secondary Control element is stored up according to the difference between once fitting and quadratic fit
It can be with the control that releases energy.When more than rated wind speed, blade pitch device is according to quadratic fit wind speed curve and rated wind speed curve difference
Value is controlled, and control given curve is moved near rated wind speed, is reduced frequent variable pitch movement, is protected pitch-controlled system.Together
When, variable pump is controlled according to rated power, and secondary component carries out accumulator according to once fitting and quadratic fit difference
Corresponding control.The control method is feed-forward and feedback complex controll.
Using the present invention have it is following the utility model has the advantages that
1, laser radar anemometer of the present invention and mechanical-hydraulic hybrid powertrain system can reach to fluctuation wind
Energy makes full use of, and improves generating efficiency.
2, mechanical-hydraulic Secondary Control hybrid powertrain system of the present invention can carry out the mistake that energy storage-releases energy
Journey keeps generated output power smoother.
3, composite control method of the present invention can be reduced frequent variable pitch movement, protect pitch-controlled system, while guaranteeing to generate electricity
System high efficiency even running.
Detailed description of the invention
Fig. 1 is the structure diagram of wind generator system embodiment of the invention.
Fig. 2 is the structure diagram of part flow arrangement 30 in Fig. 1 embodiment.
Fig. 3 is control device data queue memory schematic diagram in wind generator system control method embodiment of the invention.
Fig. 4 is that the continuous fluctuation wind speed that once fitting obtains in wind generator system control method embodiment of the invention is bent
Line.
Fig. 5 is the smooth wind speed curve that quadratic fit obtains in wind generator system control method embodiment of the invention.
Fig. 6 is the following control strategy schematic diagram of rated wind speed in wind generator system control method embodiment of the invention.
Fig. 7 is the above control strategy schematic diagram of rated wind speed in wind generator system control method embodiment of the invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
Referring to attached Fig. 1 and 2, a kind of efficient wind generator system comprising the laser radar being placed in cabin surveys wind
Instrument (not shown), mechanical-hydraulic (Secondary Control) hybrid powertrain system being placed in cabin.The mechanical-hydraulic is (secondary
Adjust) hybrid powertrain system include impeller 1 and blade pitch device, speedup planetary gear train 2, confluence device 30, synchronous generator 4,
Speed-regulating hydraulic system 50 and secondary regulation hydraulic system 60.
Wherein, impeller 1 is connected with the input shaft of speedup planetary gear train 2.The impeller 1 captures wind energy, and drives speedup
Planetary gear train 2 rotates, and the output revolving speed of speedup planetary gear train 2 is increased to certain value.Speedup planetary gear train 2 is filled by confluence
It sets 30, speed-regulating hydraulic system 50 and transfers energy to synchronous generator 4, secondary regulation hydraulic system 60 and speed-regulating hydraulic system 50
Co- controlling synchronous generator 4 keeps its power more stable, and synchronous generator 4 exports electric energy to power grid or load.
The confluence device 30 includes first gear pair 31, planetary gear 32 and second gear pair 33, first tooth
Wheel set 31 includes the first gear 311 and second gear 312 that are meshed, the shuntings planetary gear 32 including planet carrier 321, too
Sun wheel 322, planetary gear 323 and gear ring 324, the second gear pair 33 includes the third gear 331 and the 4th gear being meshed
332。
The speed-regulating hydraulic system 50 includes volume adjustable hydraulic pump 51, constant displacement hydraulic motor 52 and other are necessary hydraulic
Constituent system components (not shown), for details, reference can be made to the notes of 104696170 A of patent CN mentioned in background technique
It carries.The speed-regulating hydraulic system 50 is closed hydraulic loop.
The first gear 311 is connected with the output shaft of the speedup planetary gear train 2, planet carrier 321 respectively, and described
Two gears 312 are connected with the volume adjustable hydraulic pump 51.The third gear 331 be an integral structure with the gear ring 324 and
Energy synchronous rotary, the 4th gear 332 are connected with the constant displacement hydraulic motor 52.The sun gear 322 with it is described synchronous
Generator 4 is connected.
The secondary hydraulic control system 60 includes Secondary Control element 61 and accumulator 62, the Secondary Control element 61
Coaxially it is connected with fixed displacement motor, and exit portion connects accumulator 62.Optionally, the Secondary Control element be hydraulic motor/
Pump changes working condition and Displacement Regulation by electrohydraulic servo valve.The working condition includes pump condition or motor operating conditions.It is described
Secondary Control element manipulation recovers energy to system and is stored by accumulator when pump condition；When secondary component works in motor work
When condition, the energy of accumulator storage is discharged to system, improves energy utilization rate and smooth output power.
The wind generator system further includes control device, the control device be electrically connected laser radar anemometer,
Blade pitch device, volume adjustable hydraulic pump and Secondary Control element obtain smooth wind function for receiving and processing laser radar survey wind number
Rate curve, and it is negative to adjust based on the discharge capacity that the smooth wind power curve controls the volume adjustable hydraulic pump and Secondary Control element
Set torque, and control blade pitch device adjust impeller and capture power.
Embodiment 2
A kind of efficient wind generator system control method.
Referring to attached drawing 3, the measurement of laser radar anemometer wind speed, wind direction information at L in front of impeller, with systematic sampling rate
The sampling time of decision obtains a data with set time (such as 1s or lower) and passes controller back.Sampled data is in controller
Middle M data queue memory of setting (the N number of data of each column), data enter queue by the principle of first in first out.Data are arranged in ordered series of numbers
Full rear can be carried out in next step.
Referring to attached drawing 4, preliminary treatment data, according to wind error source, Space weighted mean, azimuthal error is surveyed, measurement is put down
Equal error, white noise etc. carry out preliminary treatment, and rolling average is fitted to obtain continuous fluctuation wind speed curve.
Referring to attached drawing 5, to the M*N air speed data progress quadratic polynomial fitting in queue, be fitted to one it is smooth
Wind speed curve, Real-time solution mean wind speed.
Referring to attached drawing 6, when below rated wind speed, variable pump and Secondary Control element collective effect control generator power；
By quadratic fit wind speed curve v2dGiven generator powerIt is dynamic that control is executed by variable pump
Make.Pass through the difference between once fitting and quadratic fit curveCalculate control
Target carries out the control of corresponding energy storage and release energy.Difference is that timing carries out energy storage movement, and control secondary component is as pump
It uses, so that accumulator stores corresponding energy；When difference is negative, control secondary component is used as motor, keeps accumulator logical
It crosses secondary component and discharges corresponding energy to system, the control of auxiliary variable pump improves generating efficiency so that output power is smooth.
Referring to attached drawing 7, when more than rated wind speed, blade pitch device controls impeller capture power and variable pump and Secondary Control member
Part controls generator power, and the two acts on stable generator power simultaneously.Generator power is given as the rated power of system
Prated, pitch control mechanism given value is quadratic fit curve wind speed and rated wind speed difference, gained power difference Δ P is calculated,Determine control target to carry out phase based on the power difference Δ P
Answer pitch control.Secondary component is controlled by the difference between once fitting and quadratic fit, and specific control mode is similar
Below aforementioned rated wind speed.Variable pitch movement can be reduced using such mode, protect blade pitch device, smooth output power.
Claims (7)
1. a kind of efficient wind generator system, including impeller (1), blade pitch device, synchronous generator (4), and by speedup
The hybrid powertrain system that planetary gear train (2), confluence device (30) and speed-regulating hydraulic system (50) are constituted, it is characterised in that: also
Including laser radar anemometer, control device and secondary regulation hydraulic system (60)；
The impeller (1) is connected with the input shaft of the speedup planetary gear train (2), and the confluence device (30) includes first
Gear pair (31), planetary gear (32) and second gear are secondary (33), and the first gear secondary (31) includes the first tooth being meshed
It takes turns (311) and second gear (312), the planetary gear (32) includes planet carrier (321), sun gear (322), planetary gear
(323) and gear ring (324), the second gear secondary (33) includes the third gear (331) and the 4th gear (332) being meshed,
The speed-regulating hydraulic system (50) is closed hydraulic loop, including volume adjustable hydraulic pump (51) and constant displacement hydraulic motor (52) are described
Secondary hydraulic control system (60) includes Secondary Control element (61) and accumulator (62)；
The first gear (311) is connected with the output shaft of the speedup planetary gear train (2) and planet carrier (321) respectively,
Second gear (312) is connected with the volume adjustable hydraulic pump (51), and third gear (331) and the gear ring (324) are integral type
Structure and can synchronous rotary, the 4th gear (332) is connected with the constant displacement hydraulic motor (52), the sun gear (322) and
The synchronous generator (4) is connected；The Secondary Control element (61) with the constant displacement hydraulic motor (52) is coaxial is connected, and
Exit portion connects the accumulator (62), the control device be electrically connected the laser radar anemometer, blade pitch device,
Volume adjustable hydraulic pump and Secondary Control element obtain smooth wind power curve for receiving and processing laser radar survey wind number, and
Control the discharge capacity of the volume adjustable hydraulic pump and Secondary Control element based on the smooth wind power curve with adjust load torque from
And generated output is controlled, and control blade pitch device adjusts impeller and captures power.
2. wind generator system as described in claim 1, it is characterised in that: the Secondary Control element is hydraulic motor/pump,
Change working condition by electrohydraulic servo valve and control its discharge capacity, the working condition includes pump condition or motor operating conditions.
3. wind generator system as claimed in claim 2, it is characterised in that: when Secondary Control element manipulation is when pump condition,
It recovers energy to system and is stored by accumulator；When secondary component works in motor operating conditions, the energy of accumulator storage is to system
Release improves energy utilization rate and smooth output power.
4. a kind of efficient wind generator system control method, which comprises the steps of:
S1, laser radar anemometer acquisition wind data are simultaneously sent to control device progress data processing；
S2, control device give wind energy conversion system control target in conjunction with operating condition according to data processed result；
S3, it is based on system running state ,+the feedback control that feedovers is carried out according to the control target, is specifically included:
When wind speed is below rated wind speed, hybrid powertrain system combination secondary regulation hydraulic system controls wind energy conversion system Tracing Control
Target given curve；
When wind speed is more than rated wind speed, blade pitch device adjusts impeller capture power and is reduced near rated power, mixes simultaneously
The volume adjustable hydraulic pump for closing transmission system is given by wind energy conversion system rated power, and controls power smooth by secondary regulation hydraulic system.
5. wind generator system control method as claimed in claim 4, which is characterized in that S1 is specifically included:
S11, laser radar anemometer measurement wind speed information at L in front of impeller, the sampling determined based on system sampling frequency
Time obtains an air speed data with Fixed Time Interval and passes control device back；
S12, M data queue memory is set in control device, each column stores N number of sampled data, and sampled data is by advanced
The principle first gone out enters queue, carries out in next step after data are booked in queue；
S13, according to survey wind error source preliminary treatment sampled data, rolling average carry out once fitting obtain continuously fluctuating wind speed
Curve v1d；
S14, quadratic polynomial fitting is carried out to M*N sampled data in queue, is fitted to a smooth wind speed curve, it is real
When solve mean wind speed v2d。
6. wind generator system control method as claimed in claim 4, which is characterized in that S2 is specifically included:
S21, when wind speed be located at incision wind speed below when, wind energy conversion system is failure to actuate, keep original state；
S22, when wind speed is located at incision wind speed between rated wind speed, by quadratic fit wind speed curve, determine that generator is given
PowerIt is controlled by variable displacement motor, in formula, P2gFor generator power, ρ is that air is close
Degree, R are the radius of impeller, v2dFor quadratic fit mean wind speed, CpFor power coefficient, λ is tip speed ratio, and β is propeller pitch angle,
η is wind energy conversion system transmission efficiency, and based on the generator power difference between once fitting and quadratic fit wind speed curveIn formula, v1dFor mean wind speed after once fitting, determine control target to carry out
Corresponding energy storage or the control to release energy:
S23, when wind speed is located at rated wind speed or more, generator power is given as the rated power P of systemratedBy variable displacement motor
It is controlled；Pitch control mechanism power given value is quadratic fit curve wind speed v2dWith rated wind speed vratedBetween difference power
It is worth Δ P, calculates gained power differenceBased on the power difference Δ
P determines that control target to carry out corresponding pitch control, to reduce variable pitch movement, protects blade pitch device；Simultaneously based on primary quasi-
Close the generator power difference between quadratic fit wind speed curveDetermine control
Control of the target to carry out corresponding energy storage or release energy, thus smooth output power；
S24, when wind speed is located at cut-out wind speed or more, off-grid, feathering.
7. wind generator system control method as claimed in claim 6, which is characterized in that in S22 and S23, be based on difference power
Value determines that control target is specifically included with the control for carrying out corresponding energy storage or releasing energy:
When power difference is that timing carries out energy storage movement, control Secondary Control element, to use, makes accumulator store phase as pump
It should be able to measure；When power difference is negative, control Secondary Control element is used as motor, and accumulator is made to pass through Secondary Control element
Corresponding energy is discharged to system, auxiliary variable pump control is so that output power is smooth.
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| CN201811157054.3A CN109209784B (en) | 2018-09-30 | 2018-09-30 | Control method of wind power generation system |
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| CN201811157054.3A CN109209784B (en) | 2018-09-30 | 2018-09-30 | Control method of wind power generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145376A (en) * | 2020-09-29 | 2020-12-29 | 沈阳航空航天大学 | Method for measuring full-time efficiency of wind turbine |
| CN113530758A (en) * | 2021-07-13 | 2021-10-22 | 华北电力大学 | Laser wind measurement-based resonance crossing method for series connection type double-impeller wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202012102872U1 (en) * | 2011-09-01 | 2012-08-22 | Gerald Hehenberger | Energy recovery plant |
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| CN112145376B (en) * | 2020-09-29 | 2021-06-22 | 沈阳航空航天大学 | Method for measuring full-time efficiency of wind turbine |
| CN113530758A (en) * | 2021-07-13 | 2021-10-22 | 华北电力大学 | Laser wind measurement-based resonance crossing method for series connection type double-impeller wind generating set |
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| CN109209784B (en) | 2020-09-01 |
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