CN105649876B - Control method and device of wind generating set - Google Patents
Control method and device of wind generating set Download PDFInfo
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- CN105649876B CN105649876B CN201511032715.6A CN201511032715A CN105649876B CN 105649876 B CN105649876 B CN 105649876B CN 201511032715 A CN201511032715 A CN 201511032715A CN 105649876 B CN105649876 B CN 105649876B
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Classifications
-
- 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
- F03D7/0256—Stall control
-
- 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
- F03D7/0276—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
-
- 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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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The embodiment of the invention provides a control method and device of a wind generating set. The control method comprises the following steps: acquiring a first wind speed at the current moment; if the first wind speed is greater than a wind speed threshold value, acquiring a first average pitch angle within a first preset time length, wherein the end time point of the first preset time length is the current time; and if the first average pitch angle is larger than the pitch angle threshold value, sending a first speed regulating instruction for triggering reduction of the rated rotating speed of the wind generating set to a pitch controller of the wind generating set. By adopting the embodiment of the invention, the problem of overspeed shutdown of the wind generating set under a strong gust wind condition can be solved, and the generating efficiency of the wind generating set is improved.
Description
Technical field
The present invention relates to wind generating technology more particularly to the control methods and device of a kind of wind power generating set.
Background technology
With the continuous development of new energy technology, wind generating technology increasingly has been favored by people, and how to wind
Power generator group carries out control and becomes the focus of people's research problem.
After wind power generating set starts, after wind speed reaches rated wind speed, usually with rated power, rated speed and volume
Determine torque work.When as occurred beyond specified high wind with high wind speed (but not up to wind power generating set cut-out wind speed), wind-force
The wheel speed of generating set can improve moment so that wind power generating set carries out overspeed protection and shuts down, to reduce wind
The generating efficiency of power generator group.
Invention content
It is an object of the present invention to by judging whether current wind regime is strong gusts of wind wind regime, with to wind power generating set
Rotating speed be adjusted so that the rotating speed of wind power generating set fluctuates on the basis of reduced levels, avoid rotating speed be more than threshold value
And wind power generating set is made to break down shutdown, to solve the problems, such as that strong gusts of wind wind regime apparatus for lower wind generating set is overrun shutdown,
Improve the generating efficiency of wind power generating set.
According to an aspect of the present invention, a kind of control method of wind power generating set is provided.The control method includes：
Obtain first wind speed at current time；
If first wind speed is more than wind speed threshold value, the first average propeller pitch angle in the first preset duration is obtained,
In, the end time point of first preset duration is current time；
If the described first average propeller pitch angle is more than propeller pitch angle threshold value, will be used to trigger reduces the wind power generating set
The first speed-regulating instruction of rated speed be sent to the pitch control device of the wind power generating set.
According to another aspect of the present invention, a kind of control device of wind power generating set is provided.The control device includes：
First wind speed acquisition module, the first wind speed for obtaining current time；
First propeller pitch angle acquisition module, if being more than wind speed threshold value for first wind speed, when acquisition first is default
The first average propeller pitch angle in length, wherein the end time point of first preset duration is current time；
First sending module will be used to trigger drop if being more than propeller pitch angle threshold value for the described first average propeller pitch angle
First speed-regulating instruction of the rated speed of the low wind power generating set is sent to the pitch control device of the wind power generating set.
The control method and device of the wind power generating set provided according to embodiments of the present invention, by detecting wind-force hair in real time
Whether motor group instantaneous wind speed and propeller pitch angle are more than respective threshold, and then judge currently whether strong gusts of wind occur, as judged to be more than
Respective threshold, it is determined that strong gusts of wind currently occur, then actively reduce wind power generating set rated speed, so that wind power generating set
Rotating speed is fluctuated in a reduced levels, and the fault threshold of overrunning of wind power generating set remains unchanged, to effectively avoid wind-force
There is machine halt trouble of overrunning in relatively high horizontal fluctuation since strong gusts of wind easily leads to unit in rotary speed of generator group, improves wind-force
The generating efficiency of generating set.
Description of the drawings
Fig. 1 is the flow chart of the control method for the wind power generating set for showing according to embodiments of the present invention one；
Fig. 2 is the flow chart of the control method for the wind power generating set for showing according to embodiments of the present invention two；
Fig. 3 is a kind of logic diagram of the control device for the wind power generating set for showing according to embodiments of the present invention three；
Fig. 4 is another logic diagram of the control device for the wind power generating set for showing according to embodiments of the present invention three.
Specific implementation mode
The inventive concept of this programme is that first real-time judge may cause the strong gusts of wind wind regime that wind power generating set is overrun,
Unit maximum (top) speed i.e. rated speed is moderately reduced when strong gusts of wind wind regime occurs.When fluctuations in wind speed is very fast, generating unit speed compared with
It is fluctuated on the basis of low-level, it is more than that wind power generating set is caused to be overrun the threshold value of shutdown to avoid rotating speed, avoids wind-power electricity generation
Unit disorderly closedown improves wind power generating set to solve the problems, such as that strong gusts of wind wind regime apparatus for lower wind generating set is overrun shutdown
Generating efficiency.
Detailed description of the present invention exemplary embodiment below in conjunction with the accompanying drawings.
Embodiment one
Fig. 1 is the flow chart of the control method for the wind power generating set for showing according to embodiments of the present invention one.By including
Control device as shown in Figure 3 executes the control method.
Referring to Fig.1, in step S110, first wind speed at current time is obtained.
Specifically, the rated speed of wind power generating set is usually changeless, the wind-power electricity generation when strong gusts of wind occurs
Generating unit speed fluctuation becomes larger, and to be well over fault threshold of overrunning, causes wind power generating set to break down and shuts down, for this purpose,
Extraneous instantaneous wind speed can be measured in real time by the anemobiagraph installed in wind power generating set.When the normal work of wind power generating set
When making, starts the anemobiagraph and detect the instantaneous wind speed (i.e. the first wind speed) in the current time external world.
In step S120, if first wind speed is more than wind speed threshold value, obtain first average in the first preset duration
Propeller pitch angle.
Wherein, the end time point of the first preset duration can be current time.Wind speed threshold value can according to actual conditions into
Row setting, for example, wind speed threshold value can be the wind speed for the rated wind speed 4m/s or more for being higher by wind power generating set.First duration can
It is configured according to actual conditions, such as 3 minutes or 5 minutes etc..
Specifically, instantaneous wind speed can not also uniquely judge to be currently strong gusts of wind state, can be using propeller pitch angle as auxiliary
Rule of judgment is helped, corresponding processing may include：First wind speed is compared with scheduled wind speed threshold value, if the first wind speed is more than
Wind speed threshold value, it is determined that current instantaneous wind speed is higher, at this point it is possible to detect wind power generating set by pitch angle detection component
Propeller pitch angle can calculate the first average pitch in the first duration after reaching the first preset duration by the propeller pitch angle detected
Angle.If the first wind speed is not more than wind speed threshold value, the processing for executing above-mentioned steps S110 is repeated.
In step S130, if the first average propeller pitch angle is more than propeller pitch angle threshold value, will be used to trigger reduces wind-force hair
First speed-regulating instruction of the rated speed of motor group is sent to the pitch control device of the wind power generating set.
Wherein, when propeller pitch angle threshold value can be wind speed threshold value according to wind speed under normal circumstances, the propeller pitch angle of wind power generating set
Approximate range and determine, or can be set according to actual conditions.
Specifically, the obtain first average propeller pitch angle can be compared with propeller pitch angle threshold value, if this first is averaged
Propeller pitch angle is more than propeller pitch angle threshold value, then can determine that current wind speed is larger, propeller pitch angle is not on minimum position, it is believed that when
Preceding is strong gusts of wind state, at this point it is possible to which generating the first speed-regulating instruction is sent to pitch control device.In this way, pitch control device receives
To after the first speed-regulating instruction, the rated speed of wind power generating set can be turned down desired speed, such as turn down K times of volume
Determine rotating speed, wherein K is the constant less than 1, specific such as 0.85.If the first average propeller pitch angle is not more than propeller pitch angle threshold value,
Can determine current wind speed and little, it is believed that be currently non-strong gusts of wind state, at this point, it is repeatable execute above-mentioned steps S110~
The processing of step S130.
It should be noted that if occurred when detecting wind speed, abnormal or wind speed measurement is normal but wind power generating set
Operating status deposit when abnormal, above-mentioned pitch corner condition will appear ungratified situation, at this point, would not allow for wind-driven generator
Group is adjusted its rated speed.
The control method of wind power generating set provided in an embodiment of the present invention, it is instantaneous by detecting wind power generating set in real time
Whether wind speed and propeller pitch angle are more than respective threshold, and then carry out whether logic judgment currently strong gusts of wind occurs, such as judge to be more than phase
Answer threshold value, it is determined that strong gusts of wind currently occur, then actively reduce wind power generating set rated speed, so that wind power generating set turns
Speed is fluctuated in a reduced levels, and the fault threshold of overrunning of wind power generating set remains unchanged, to effectively wind-force be avoided to send out
There is machine halt trouble of overrunning in relatively high horizontal fluctuation since strong gusts of wind easily leads to unit in electric generating unit speed, improves wind-force hair
The generating efficiency of motor group.
Embodiment two
Fig. 2 is the flow chart of the control method for the wind power generating set for showing according to embodiments of the present invention two, the embodiment
It can be considered another concrete implementation scheme of Fig. 1.
With reference to Fig. 2 first wind speed at current time is obtained in step S210.
The step content of step S210 is identical as the step content of step S110 in above-described embodiment one, no longer superfluous herein
It states.
In step S220, if first wind speed is more than wind speed threshold value, obtain first average in the first preset duration
Propeller pitch angle.
The step content of step S220 is identical as the step content of step S120 in above-described embodiment one, no longer superfluous herein
It states.
In addition, the first preset duration can there are many representation, in order to it is sufficient, accurately show to be currently strong gusts of wind
State can set the end time point of the first preset duration to current time, correspondingly, can be using current time as terminating
Time point searches to before current time, obtains multiple propeller pitch angles in the first preset duration, can to multiple propeller pitch angle into
Row mean value calculation obtains the first average propeller pitch angle in the first preset duration.For example, current time is 15:15:00, first
Preset duration is 3 minutes, then can obtain 15:12:00~15:15:The first average propeller pitch angle in 00.
In step S230, if the first average propeller pitch angle is more than propeller pitch angle threshold value, it is knot to obtain with the current time
The first mean wind speed in second preset duration at beam time point.
Wherein, the second preset duration may be set according to actual conditions, such as 10 seconds or 15 seconds specific.
Specifically, in order to improve the accuracy to strong gusts of wind condition adjudgement, in addition to instantaneous wind speed and average propeller pitch angle conduct
Outside critical parameter, the amplitude that wind speed in the short time rises can also be further used to judge whether be currently strong gusts of wind state,
Corresponding processing may include：Can pre-recorded each moment instantaneous wind speed.The average propeller pitch angle and propeller pitch angle that can will be obtained
Threshold value is compared, if the average propeller pitch angle is more than propeller pitch angle threshold value, can determine that current wind speed is larger, and propeller pitch angle is not
On minimum position, at this point it is possible to current time be end time point, to current time before acquisition the second scheduled duration, together
When, the instantaneous wind speed in the second scheduled duration can be obtained, the average value of the instantaneous wind speed is calculated, obtains the first mean wind speed.
It should be noted that the first mean wind speed can also be achieved other ways, such as the first mean wind speed can be
One permanent number, or the output of a Wind speed model calculation formula is as a result, such as function of c=f (v), c are first average
Wind speed, v are the mean wind speed in the short time.The size of mean wind speed in short time decides the difference of c values, in this way, can be with
Adaptability of the wind power generating set under complicated wind regime is improved, Wind speed model calculation formula can be built according to the practical wind regime of wind field
It is vertical.
In step S240, if the first wind speed is more than the first mean wind speed, will be used to trigger reduces wind power generating set
The first speed-regulating instruction of rated speed be sent to the pitch control device of wind power generating set.
Specifically, the first obtained wind speed can be compared with the first mean wind speed, if the first wind speed is more than the
One mean wind speed then can determine that current wind speed is larger, it is believed that be currently strong gusts of wind state, at this point it is possible to generate the first tune
Speed instruction is sent to pitch control device, can be by the volume of wind power generating set after pitch control device receives the first speed-regulating instruction
Determine rotating speed to turn down, so that the rotating speed of wind power generating set fluctuates in reduced levels, avoids the rotating speed of wind power generating set
Wind power generating set is caused to be overrun shutdown more than rated speed.
Further, it is contemplated that the stability and generating efficiency of wind power generating set, by the specified of wind power generating set
After rotating speed is turned down, the torque of wind power generating set can suitably be turned up, to ensure the output work of wind power generating set as far as possible
Rate is stablized, therefore, the first speed governing for triggering the rated speed for reducing wind power generating set being referred in above-mentioned steps S240
The processing for enabling the pitch control device for being sent to wind power generating set, may include the following contents：It will be used to trigger wind-power electricity generation
The first speed-regulating instruction that the rated speed of unit is reduced to scheduled rotating speed of target is sent to the pitch control of wind power generating set
Device；It will be for triggering the first tune torque command transmission that the nominal torque of wind power generating set is risen to scheduled target torque
To the torque controller of wind power generating set.
Specifically, it if by the processing of step S240, determines that the first wind speed is more than the first mean wind speed, then can generate
First speed-regulating instruction and first adjusts torque command, in order to reduce the rated speed of wind power generating set as early as possible to avoid wind-power electricity generation
Unit is overrun shutdown, can the first speed-regulating instruction be first sent to pitch control device, by pitch control device by wind-driven generator
The rated speed of group is turned down as rotating speed of target, it is then possible to which the first tune torque command is sent to torque controller, moment of torsion control
The nominal torque of wind power generating set can be turned up to target torque for device, to ensure the wind-driven generator after adjustment as far as possible
Group has higher generating efficiency.
Further, the value of rotating speed of target and target torque meets the item for keeping the rated power of wind power generating set constant
Part.
It should be noted that during adjusting the rated speed and nominal torque of wind power generating set, can pass through
The mode of rated speed regulation coefficient and nominal torque regulation coefficient executes adjustment process, wherein rated speed regulation coefficient and
The relationship of nominal torque regulation coefficient and the power of wind power generating set, can be as follows：
Te=Kopt*Ω2.................................(1)
The π of Ω=2 n/60.................................... (3)
According to formula (1), (2), (3), can derive
P=0.9n*Te/9.553π2...............................(4)
Wherein, TeFor electromagnetic torque, KoptFor optimum gain, Ω is angular speed, and P is power, and n is rotating speed.
Initial nominal power is P before adjustmente, power P after adjustment can derive by formula (4)
P=k1*k2*Pe............................(5)
It can be seen that according to formula (5), as nominal torque regulation coefficient k2=1/k1When, it is ensured that before and after rated speed adjustment
Wind power generating set output power it is constant.
In addition, for rated speed regulation coefficient k1, can be a constant, such as k1=0.97, it can also be pre- by certain
Imputation method determines, if the mean wind speed in the short time is by taking 10 seconds mean wind speeds as an example, rated speed regulation coefficient k1For about change
Measure v10sFunction, k1=f (v10s), v10sFor 10s mean wind speeds.
k1=f (v10s) can be a segmentation and continuous function：
It can determine rated speed regulation coefficient k through the above1With nominal torque regulation coefficient k2。
In addition, in order to ensure the operation stability of wind power generating set, timer can be set, be arranged for strong gusts of wind state
One executes the period (such as 2 minutes), which is provided with output end (i.e. TOF.Q), when output end is 1, it may be determined that when
Preceding wind power generating set is in strong gusts of wind state, at this point, by the rated speed of wind power generating set is reduced to for triggering
First speed-regulating instruction of scheduled rotating speed of target is sent to the pitch control device of wind power generating set, and will be used to trigger wind-force
The nominal torque of generating set rises to the first of the scheduled target torque torsion for adjusting torque command to be sent to wind power generating set
Square controller, so that pitch control device and torque controller execute corresponding operation；When output end is 0, then meter can be determined
When terminate, at this time wind power generating set still with rotating speed of target work be still restored to rated speed work can depend on it is current
Wind regime.
When timer preset execution period (such as 2 minutes) reach, can be judged by current instantaneous wind speed
Whether wind power generating set can be restored to rated speed work, and corresponding processing may include following steps S250 and step
S260。
In step S250, when reaching third preset duration, the second wind speed is obtained.
Wherein, third preset duration can be timer be the strong gusts of wind state preset execution period, such as 2 minutes or
3 minutes etc..
Specifically, after rated speed is reduced to rotating speed of target and nominal torque is risen to target torque, Ke Yitong
Timer timing is crossed, when reaching the execution period preset for strong gusts of wind state, the output end TOF.Q of timer is 0, this
When, current wind speed, i.e. the second wind speed can be obtained by anemobiagraph.
In step S260, if second wind speed is not more than the wind speed threshold value, will be used to trigger wind power generating set
Rotating speed of target rise to the second speed-regulating instruction of rated speed and be sent to the pitch control device of wind power generating set, and will be used for
The second tune torque command that the target torque of wind power generating set is reduced to nominal torque by triggering is sent to wind power generating set
Torque controller.
Specifically, the second wind speed can be compared with wind speed threshold value, if the second wind speed is not more than wind speed threshold value, is given birth to
Torque command is adjusted at the second speed-regulating instruction and second, and the second speed-regulating instruction can be sent to pitch control device, pitch control
The rotating speed of the wind power generating set can be converted to rated speed by device by rotating speed of target, at the same time it can also refer to the second tune torque
Order is sent to torque controller, and torque can be converted to nominal torque by torque controller by target torque.
Rotating speed is adjusted back into rated speed by rotating speed of target except through aforesaid way, torque adjusts back to volume by target torque
Determine outside torque, can also handle otherwise, such as：
Mode one, after rated speed is reduced to rotating speed of target and nominal torque is risen to target torque, Ke Yitong
Timer timing is crossed, when reaching the execution period preset for strong gusts of wind state, the output end TOF.Q of timer is 0, this
When can start timing, when reaching four preset durations, obtain the second average propeller pitch angle in the 4th preset duration, wherein the
Four preset durations can be to obtain the duration of averagely propeller pitch angle, such as 3 minutes.It is then possible to by the second average propeller pitch angle and pitch
Angle threshold comparison will carry the rotating speed of target of unit for triggering if the second average propeller pitch angle is not more than propeller pitch angle threshold value
The third speed-regulating instruction of a height of rated speed is sent to the pitch control device of unit, the rotating speed of target of unit is risen to specified
Rotating speed, and the target torque of unit can will be reduced to the third tune torque command of nominal torque be sent to unit for triggering
The target torque of unit is reduced to nominal torque by torque controller.
Mode two obtains the second average wind in third wind speed and the second preset duration when reaching five preset durations
The rotating speed of target of unit will be risen to rated speed by speed if third wind speed is not more than the second mean wind speed for triggering
The 4th speed-regulating instruction be sent to the pitch control device of unit, and the target torque of unit will be reduced to specified torsion for triggering
4th tune torque command of square is sent to the torque controller of unit.
Wherein, it is the strong gusts of wind state preset execution period that the 5th preset duration, which is timer, such as 2 minutes.
Specifically, after rated speed is reduced to rotating speed of target and nominal torque is risen to target torque, Ke Yitong
Timer timing is crossed, when reaching the execution period preset for strong gusts of wind state, the output end TOF.Q of timer is 0, this
When obtain the second mean wind speed in third wind speed and the second preset duration, it is then possible to by third wind speed and the second average wind
Speed is compared, if third wind speed is not more than the second mean wind speed, will be risen to the rotating speed of target of unit for triggering
4th speed-regulating instruction of rated speed is sent to the pitch control device of unit, and will reduce the target torque of unit for triggering
The torque controller of unit is sent to for the 4th tune torque command of nominal torque, above-mentioned specific processing mode can be found in aforementioned phase
Hold inside the Pass, details are not described herein.
The rotating speed of target of unit will be risen to rated speed by mode three when reaching six preset durations for triggering
The 5th speed-regulating instruction be sent to the pitch control device of unit, and the target torque of unit will be reduced to specified torsion for triggering
5th tune torque command of square is sent to the torque controller of unit.
Wherein, the 6th preset duration can be timer be the strong gusts of wind state preset execution period, such as 2 minutes or
It 3 minutes etc., can also be set according to actual conditions.
Wherein, above-mentioned processing mode can be found in aforementioned related content, and details are not described herein.
Through the above, timer is the preset a cycle executed after the period of strong gusts of wind state, such as fixed
When device be not triggered, wind power generating set is switched to rated speed and nominal torque.Timer is that strong gusts of wind state is preset
Execute the period after a cycle, if timer is triggered again wind power generating set continue with rotating speed of target and target
Torque works.Therefore, timer output end TOF.Q states can be used as the switching condition of two kinds of control models, make wind-driven generator
Group must be run 2 minutes when detecting the presence of strong gusts of wind under strong gusts of wind control model, to cope with instantaneous strong gusts of wind.At this moment
Between in section, such as detect there is no strong gusts of wind, then wind power generating set does not cut out strong gusts of wind control model yet, avoid due to
The PLC scan periods are too short cause wind power generating set control model toggle and can not stabilized (steady-state) speed the problem of.
It should be noted that for step S210 and S220, if first wind speed is not more than wind speed threshold value, can detect
Whether timer output end TOF.Q is 1, if timer output end TOF.Q is 1, is worked with rotating speed of target and target torque,
If timer output end TOF.Q is 0, worked with rated speed and nominal torque.
For step S230, if the first average propeller pitch angle is not more than propeller pitch angle threshold value, timer output can detect
It holds whether TOF.Q is 1, if timer output end TOF.Q is 1, is worked with rotating speed of target and target torque, if timer
Output end TOF.Q is 0, then is worked with rated speed and nominal torque.
For step S240, it is if the first wind speed can detect timer output end TOF.Q no more than the first mean wind speed
No is 1, if timer output end TOF.Q is 1, is worked with rotating speed of target and target torque, if timer output end
TOF.Q is 0, then is worked with rated speed and nominal torque.Specific related content may refer to above-mentioned related content, herein not
It repeats again.
The control method of wind power generating set provided in an embodiment of the present invention, on the one hand, to the first wind speed and wind speed threshold
After value and average propeller pitch angle and the multilevel iudge of propeller pitch angle threshold value, further by carrying out the first wind speed and the first mean wind speed
Multilevel iudge determines whether for strong gusts of wind wind regime, to improve the recognition capability to strong gusts of wind wind regime, improves wind power generating set
Precise control rate；On the other hand, the rotating speed of wind power generating set and torque are restored to rated value by setting preset duration,
Alternatively, by wind speed and wind speed threshold value or the relationship of wind speed and mean wind speed, the rotating speed of wind power generating set and torque is extensive
Rated value is arrived again, to improve the generating efficiency and stability of wind power generating set.
Embodiment three
Based on the same technical idea, Fig. 3 is the control dress for the wind power generating set for showing according to embodiments of the present invention three
The logic diagram set.With reference to Fig. 3, which includes the first wind speed acquisition module 310, the first propeller pitch angle acquisition module 320
With the first sending module 330.
First wind speed acquisition module 310 is used to obtain first wind speed at current time.
If the first propeller pitch angle acquisition module 320 is more than wind speed threshold value for first wind speed, when acquisition first is default
The first average propeller pitch angle in length, wherein the end time point of first preset duration is current time.
If the first sending module 330 is more than propeller pitch angle threshold value for the first average propeller pitch angle, will be used to trigger drop
First speed-regulating instruction of the rated speed of the low wind power generating set is sent to the pitch control device of the wind power generating set.
Further, on the basis of embodiment shown in Fig. 3, the first sending module 330 as shown in Figure 4 includes：First
Mean wind speed acquiring unit 331 obtains if being more than propeller pitch angle threshold value for the first average propeller pitch angle with the current time
For the first mean wind speed in the second preset duration of end time point；First speed-regulating instruction transmission unit 332, if for should
First wind speed is more than first mean wind speed, then by the first speed governing for triggering the rated speed for reducing the wind power generating set
Instruction is sent to the pitch control device of the wind power generating set.
In addition, the first sending module 330 for will be used to trigger the rated speed of the wind power generating set is reduced to it is pre-
First speed-regulating instruction of fixed rotating speed of target is sent to the pitch control device of the wind power generating set；It will be used to trigger the wind-force
The first tune torque command that the nominal torque of generating set rises to scheduled target torque is sent to the wind power generating set
Torque controller.
Keep the rated power of the wind power generating set constant in addition, the value of the rotating speed of target and the target torque meets
Condition.
Further, which further includes：
Second wind speed acquisition module is used for when reaching third preset duration, the second wind speed of acquisition, the second sending module,
If being not more than the wind speed threshold value for second wind speed, the rotating speed of target will be risen into the rated speed for triggering
Second speed-regulating instruction is sent to the pitch control device, and the target torque will be reduced to the second of the nominal torque for triggering
Torque command is adjusted to be sent to the torque controller；
Alternatively, the second propeller pitch angle acquisition module, for when reaching four preset durations, obtaining in the 4th preset duration
The second average propeller pitch angle, third sending module will if being not more than the propeller pitch angle threshold value for the second average propeller pitch angle
It the rotating speed of target is risen to the third speed-regulating instruction of the rated speed is sent to the pitch control device for triggering, and will be used for
The third tune torque command that the target torque is reduced to the nominal torque by triggering is sent to the torque controller；
Alternatively, third wind speed acquisition module, for when reaching five preset durations, obtain third wind speed and this second in advance
If the second mean wind speed in duration, the 4th sending module, if being not more than second mean wind speed for the third wind speed,
The 4th speed-regulating instruction for rising to the rated speed for triggering the rotating speed of target is sent to the pitch control device, and will be used for
The 4th tune torque command that the target torque is reduced to the nominal torque by triggering is sent to the torque controller；
Alternatively, the 5th sending module, improves the rotating speed of target for that when reaching six preset durations, will be used to trigger
It is sent to the pitch control device for the 5th speed-regulating instruction of the rated speed, and will be used to trigger and the target torque is reduced to this
5th tune torque command of nominal torque is sent to the torque controller.
The control device of wind power generating set provided in an embodiment of the present invention, it is instantaneous by detecting wind power generating set in real time
Whether wind speed and propeller pitch angle are more than respective threshold, and then judge currently whether strong gusts of wind occur, such as judge to be more than respective threshold, then
Currently there is strong gusts of wind in determination, then wind power generating set rated speed is actively reduced, so that wind power generating set rotating speed is at one
Reduced levels fluctuate, and the fault threshold of overrunning of wind power generating set remains unchanged, to effectively avoid wind power generating set from turning
There is machine halt trouble of overrunning in relatively high horizontal fluctuation since strong gusts of wind easily leads to unit in speed, improves wind power generating set
Generating efficiency.
Further, in the embodiment of the present invention, on the one hand, to the first wind speed and wind speed threshold value and average propeller pitch angle and paddle
After the multilevel iudge of elongation threshold value, further by the way that the first wind speed is compared judgement with the first mean wind speed, determine current
Whether it is strong gusts of wind wind regime, improves the recognition capability to strong gusts of wind wind regime, improve the precise control rate of wind power generating set；It is another
The rotating speed of wind power generating set and torque are restored to rated value, alternatively, passing through wind speed and wind by aspect by setting preset duration
The rotating speed of wind power generating set and torque are restored to rated value, to carry by the relationship of fast threshold value or wind speed and mean wind speed
The generating efficiency and stability of high wind power generating set.
It may be noted that according to the needs of implementation, each step/component described in this application can be split as more multistep
The part operation of two or more step/components or step/component can be also combined into new step/component by suddenly/component,
To achieve the object of the present invention.
It is above-mentioned to be realized in hardware, firmware according to the method for the present invention, or be implemented as being storable in recording medium
Software or computer code in (such as CD ROM, RAM, floppy disk, hard disk or magneto-optic disk), or it is implemented through network download
Original storage in long-range recording medium or nonvolatile machine readable media and the meter that will be stored in local recording medium
Calculation machine code, to which method described here can be stored in using all-purpose computer, application specific processor or may be programmed or special
It is handled with such software in the recording medium of hardware (such as ASIC or FPGA).It is appreciated that computer, processor, micro-
Processor controller or programmable hardware include can store or receive software or computer code storage assembly (for example, RAM,
ROM, flash memory etc.), when the software or computer code are by computer, processor or hardware access and execute, realize herein
The processing method of description.In addition, when all-purpose computer accesses the code for realizing the processing being shown here, the execution of code
All-purpose computer is converted into the special purpose computer for executing the processing being shown here.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
1. a kind of control method of wind power generating set, which is characterized in that the control method includes：
Obtain first wind speed at current time；
If first wind speed is more than wind speed threshold value, the first average propeller pitch angle in the first preset duration is obtained, wherein institute
The end time point for stating the first preset duration is current time；
If the described first average propeller pitch angle is more than propeller pitch angle threshold value, will be for triggering the volume for reducing the wind power generating set
The first speed-regulating instruction for determining rotating speed is sent to the pitch control device of the wind power generating set,
Wherein, if the described first average propeller pitch angle is more than propeller pitch angle threshold value, will be used to trigger reduces the wind-force hair
The processing that first speed-regulating instruction of the rated speed of motor group is sent to the pitch control device of the wind power generating set includes：
If the described first average propeller pitch angle is more than propeller pitch angle threshold value, the using the current time as end time point is obtained
The first mean wind speed in two preset durations；
If first wind speed is more than first mean wind speed, will be for triggering the volume for reducing the wind power generating set
The first speed-regulating instruction for determining rotating speed is sent to the pitch control device of the wind power generating set.
2. control method according to claim 1, which is characterized in that described to be used to trigger the reduction wind-driven generator
The processing of the first speed-regulating instruction pitch control device for being sent to the wind power generating set of the rated speed of group includes：
It will be for triggering the first speed-regulating instruction that the rated speed of the wind power generating set is reduced to scheduled rotating speed of target
It is sent to the pitch control device of the wind power generating set；
By for trigger by the nominal torque of the wind power generating set rise to scheduled target torque first tune torque refer to
Enable the torque controller for being sent to the wind power generating set.
3. control method according to claim 2, which is characterized in that the value of the rotating speed of target and the target torque is full
The condition that foot keeps the rated power of the wind power generating set constant.
4. control method according to claim 3, which is characterized in that the control method further includes：
When reaching third preset duration, the second wind speed is obtained, it, will if second wind speed is not more than the wind speed threshold value
It the rotating speed of target is risen to the second speed-regulating instruction of the rated speed is sent to the pitch control device for triggering, and
By for trigger by the target torque be reduced to the nominal torque second tune torque command be sent to the moment of torsion control
Device；Alternatively,
When reaching four preset durations, the second average propeller pitch angle in the 4th preset duration is obtained, if described second
Average propeller pitch angle is not more than the propeller pitch angle threshold value, then the rotating speed of target will be risen to the rated speed for triggering
Third speed-regulating instruction is sent to the pitch control device, and will be used to trigger and the target torque is reduced to the nominal torque
Third tune torque command be sent to the torque controller；Alternatively,
When reaching five preset durations, the second mean wind speed in third wind speed and second preset duration is obtained, if
The third wind speed is not more than second mean wind speed, then will be used to trigger that the rotating speed of target to be risen to described specified turn
Speed the 4th speed-regulating instruction be sent to the pitch control device, and will be used for trigger the target torque is reduced to it is described specified
4th tune torque command of torque is sent to the torque controller；Alternatively,
It, will be for triggering the 5th speed governing that the rotating speed of target is risen to the rated speed when reaching six preset durations
Instruction is sent to the pitch control device, and will be for triggering the 5th tune that the target torque is reduced to the nominal torque
Torque command is sent to the torque controller.
5. a kind of control device of wind power generating set, which is characterized in that the control device includes：
First wind speed acquisition module, the first wind speed for obtaining current time；
First propeller pitch angle acquisition module obtains if being more than wind speed threshold value for first wind speed in the first preset duration
The first average propeller pitch angle, wherein the end time point of first preset duration is current time；
First sending module, if being more than propeller pitch angle threshold value for the described first average propeller pitch angle, will be used to trigger reduces institute
The first speed-regulating instruction for stating the rated speed of wind power generating set is sent to the pitch control device of the wind power generating set,
Wherein, first sending module includes：
First mean wind speed acquiring unit obtains if being more than propeller pitch angle threshold value for the described first average propeller pitch angle with institute
State the first mean wind speed in the second preset duration that current time is end time point；
First speed-regulating instruction transmission unit will be used to touch if being more than first mean wind speed for first wind speed
First speed-regulating instruction of the rated speed of the hair reduction wind power generating set is sent to the variable pitch control of the wind power generating set
Device processed.
6. control device according to claim 5, which is characterized in that first sending module is used for：
It will be for triggering the first speed-regulating instruction that the rated speed of the wind power generating set is reduced to scheduled rotating speed of target
It is sent to the pitch control device of the wind power generating set；The nominal torque of the wind power generating set will be improved for triggering
The torque controller of the wind power generating set is sent to for the first tune torque command of scheduled target torque.
7. control device according to claim 6, which is characterized in that the value of the rotating speed of target and the target torque is full
The condition that foot keeps the rated power of the wind power generating set constant.
8. control device according to claim 7, which is characterized in that the control device further includes：
Second wind speed acquisition module, for when reaching third preset duration, obtaining the second wind speed,
Second sending module will be used to trigger the mesh if being not more than the wind speed threshold value for second wind speed
The second speed-regulating instruction that mark rotating speed rises to the rated speed is sent to the pitch control device, and will be used to trigger will be described
The second tune torque command that target torque is reduced to the nominal torque is sent to the torque controller；Alternatively,
Second propeller pitch angle acquisition module, for when reaching four preset durations, obtaining second in the 4th preset duration
Average propeller pitch angle,
Third sending module will be used to trigger if being not more than the propeller pitch angle threshold value for the described second average propeller pitch angle
The third speed-regulating instruction that the rotating speed of target is risen to the rated speed is sent to the pitch control device, and will be used to touch
The third tune torque command that the target torque is reduced to the nominal torque by hair is sent to the torque controller；Alternatively,
Third wind speed acquisition module, for when reaching five preset durations, obtaining third wind speed and second preset duration
The second interior mean wind speed,
4th sending module will be used to trigger institute if being not more than second mean wind speed for the third wind speed
It states rotating speed of target and rises to the 4th speed-regulating instruction of the rated speed and be sent to the pitch control device, and will be used to trigger will
The 4th tune torque command that the target torque is reduced to the nominal torque is sent to the torque controller；Alternatively,
5th sending module, for when reaching six preset durations, will be used to trigger and rise to the rotating speed of target described in
5th speed-regulating instruction of rated speed is sent to the pitch control device, and will be used to trigger and the target torque is reduced to institute
The 5th tune torque command for stating nominal torque is sent to the torque controller.
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| CN201511032715.6A CN105649876B (en) | 2015-12-31 | 2015-12-31 | Control method and device of wind generating set |
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| CN105649876B true CN105649876B (en) | 2018-10-19 |
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| CN106321358A (en) * | 2016-08-31 | 2017-01-11 | 长沙学院 | Wind turbine power generation control system |
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| CN112012883B (en) * | 2019-05-30 | 2022-06-07 | 北京金风科创风电设备有限公司 | Wind generating set operation control method and device and storage medium |
| CN112746927B (en) * | 2019-10-30 | 2022-08-23 | 北京金风科创风电设备有限公司 | Variable pitch control method, device, system and medium for wind generating set |
| CN112943528B (en) * | 2019-11-26 | 2022-11-01 | 新疆金风科技股份有限公司 | Control method and device of wind generating set |
| CN113572252A (en) * | 2020-04-28 | 2021-10-29 | 北京金风科创风电设备有限公司 | Backup power supply system, wind generating set and variable pitch control method |
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