CN108119301B - Shutdown control method and device of wind generating set - Google Patents
Shutdown control method and device of wind generating set Download PDFInfo
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- CN108119301B CN108119301B CN201611081774.7A CN201611081774A CN108119301B CN 108119301 B CN108119301 B CN 108119301B CN 201611081774 A CN201611081774 A CN 201611081774A CN 108119301 B CN108119301 B CN 108119301B
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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
- F03D7/00—Controlling wind motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a method and a device for controlling the shutdown of a wind generating set. Wherein, the method comprises the following steps: determining an interval with a larger torque reduction rate in a corresponding relation curve of the rotating speed and the torque when a preset wind generating set operates, taking inflection points with smaller rotating speed values corresponding to the inflection points at two ends of the interval as critical points, and selecting one or more than one reference points according to the critical points; acquiring the rotating speed of the wind driven generator when the wind driven generator is stopped, and constructing a stop control function with an upward opening and monotony according to torque and rotating speed data corresponding to a reference point and torque and rotating speed data of the wind driven generator at the moment when the wind driven generator actually starts to stop when the rotating speed is higher than the rotating speed corresponding to a critical point; and obtaining a torque value corresponding to the rotating speed according to the stop control function, and performing stop control on the wind driven generator by using the torque value. By the method, the torque of the generator is reduced more stably, so that the vibration impact on the wind generating set caused by sudden change of the torque in the shutdown process is reduced.
Description
Technical field
The invention belongs to technical field of wind power generation more particularly to the halt control methods and dress of a kind of wind power generating set
It sets.
Background technique
The energy is social economy and the main matter basis of human lives, is the power of social development.However, as the world
The reserves of the non-renewable energy such as petroleum, coal, the natural gas of energy mainstay are reduced increasingly, and world's every country all exists
Develop wind-power electricity generation, wind-power electricity generation has formd mature scale as new energy.
Wind power generating set is the equipment for converting wind energy into electric energy, and wind energy drives main shaft, gearbox, power generation by impeller
Unit is converted into electric energy, and by cutting-in control, the electrical energy transportation that wind power generating set is issued is into power grid, so simultaneously network control
System is the important link of wind power generating set control.Other than starting automatically, is grid-connected, wind power generating set also has safety
Protection system, safeguard protection and processing system are divided into three-decker: computer system, independently of the theft-resistant link chain of computer system,
The safeguard measure of device itself.By failure inside or outside Wind turbine, or monitoring parameter over-limit condition and occur urgent
Situation or control system failure, when wind power generating set cannot be maintained at normal operation range, then will start safeguard protection system
System, makes wind turbine power generation unit maintain safe condition.The single failure of any part or power occur inside safety system
When the failure of source, safety system is implemented to protect to wind power generating set.
The halt mode of wind power generating set is to realize aerodynamic brake by the emergency feathering function of pitch-controlled system at present, by
When wind power generating set generator operation, generator loads biggish electromagnetic torque, if horse back off-grid, biggish electromagnetic torque
Suddenly disappear and can cause very big impact to unit, so in stopping process, with the decline of generator speed, torque value
It also can be also revolving speed-torque curve decline along wind power generating set with decline, the decline of torque, and revolving speed-turns
Square curve is larger in high speed stage descending slope, and it is too fast to will lead to torque drop, and so as to cause unit vibration, existing safety is protected
There are no a kind of effective control modes for protecting system to reduce the impact that stopping process generates generating set, thus effective protection
Generating set.
Summary of the invention
The embodiment of the present invention provides the halt control method and device of a kind of wind power generating set.
On the one hand, the embodiment of the present invention provides a kind of halt control method of wind power generating set, comprising: determines preset
The biggish section of torque-down rates in revolving speed and torque corresponding relationship curve when wind power generating set is run, by the both ends in section
The corresponding lesser inflection point of tachometer value chooses one or more reference points according to critical point as critical point in inflection point,
In, the step of corresponding torque value of reference point or tachometer value are less than the corresponding torque value of critical point or tachometer value；Acquire wind-force hair
Revolving speed when situation occurs to shut down for motor, when revolving speed is higher than the corresponding revolving speed of critical point, according to the corresponding torque of reference point and
Rotary speed data and the practical torque for starting to shut down the moment of wind power generating set and rotary speed data building opening upwards, dull shutdown
The step of control function；And the corresponding torque value of revolving speed is obtained according to control function is shut down, using torque value to wind-power electricity generation
Machine carries out the step of shutting down control.
On the other hand, the embodiment of the present invention provides a kind of stop control apparatus of wind power generating set, comprising: data processing
Unit, control function construction unit and control unit, the data processing unit are configured to determine that preset wind power generating set
The biggish section of torque-down rates in revolving speed and torque corresponding relationship curve when operation, will be corresponding in the both ends inflection point in section
The lesser inflection point of tachometer value is as critical point, according to critical point selection or more than one reference point, wherein corresponding turn of reference point
Square value or tachometer value are less than the corresponding torque value of critical point or tachometer value；The control function construction unit is configured as acquisition wind
Revolving speed when situation occurs to shut down for power generator, in revolving speed revolving speed corresponding higher than critical point, according to corresponding turn of reference point
It is square and rotary speed data and the practical torque for starting to shut down the moment of wind power generating set and rotary speed data building opening upwards, dull
Shut down control function；The control unit is configured as utilizing torque according to the corresponding torque value of control function acquisition revolving speed is shut down
Value carries out shutdown control to wind-driven generator.
Also on the one hand, the embodiment of the present invention provides a kind of stop control apparatus of wind power generating set, comprising: memory,
Processor and output equipment, the memory is for storing computer executable instructions；The processor is for executing memory storage
Execute instruction, execute instruction so that processor executes the halt control method of above-mentioned wind power generating set；The output equipment
The control instruction that generates after the executing instruction of memory storage is executed for output processor.
The halt control method and device of wind power generating set provided in an embodiment of the present invention occur in wind power generating set
When shutdown, by the shutdown Controlling model of foundation, so that blower during revolving speed rapid decrease, controls the decline phase of torque
To slow, keep generator torque decline more stable, wind-force is sent out due to caused by the mutation of torque to reduce in stopping process
The vibratory impulse of motor group.
Detailed description of the invention
The features and advantages of the present invention can be more clearly understood by reference to attached drawing, attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is shown in the revolving speed and torque corresponding relationship for not using the fan parking process of the halt control method or device
Curve revolving speed and torque corresponding relationship curve graph；
Fig. 2 shows the motor speed and torque for not using the fan parking process of the halt control method or device at any time
Between change curve；
Fig. 3 shows the unit vibration curve in the fan parking process for not using the halt control method or apparatus system
Figure；
Fig. 4 shows a kind of flow chart of the halt control method according to embodiment；
Fig. 5 shows corresponding with torque according to a kind of motor speed of the fan parking process of the halt control method of embodiment
Relation curve revolving speed and torque corresponding relationship curve graph.
Fig. 6, which is shown, changes over time curve graph according to a kind of vane angle of the halt control method of embodiment；
Fig. 7 shows a kind of structural block diagram of the stop control apparatus according to embodiment；
Fig. 8 shows the structural schematic diagram realized according to a kind of stop control apparatus of embodiment by calculating equipment；
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is described.
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.In the figure in order to clear
It is clear, it may be exaggerated the thickness of region and layer.Identical appended drawing reference indicates same or similar structure in figure, thus will save
Slightly their detailed description.
With reference to the accompanying drawing, the halt control method and dress of wind power generating set according to an embodiment of the present invention is described in detail
It sets.
Fig. 1 is shown in the revolving speed and torque corresponding relationship for not using the fan parking process of the halt control method or device
Curve graph revolving speed and torque corresponding relationship curve.The curve is the theoretical wind-power electricity generation that blade producer or generator producer provide
The corresponding relationship curve of unit revolving speed and torque in the process of running.By taking doubly fed wind turbine generator as an example, abscissa is to turn
Speed, unit rpm；Ordinate is torque, unit Nm；Wind power generating set is during starting, grid-connected, with the increasing of wind-force
Greatly and the raising of revolving speed, torque value also can be increasing.And the rising of revolving speed, it is a process gradually, so torque value
And it gradually rises.Equally, in wind power generating set stopping process, the variation of torque is also to be changed according to this curve,
It will be noted from fig. 1 that the slope of curve at B-A sections is very big, so revolving speed declines meeting quickly during feathering is shut down
Cause torque drop too fast.Here torque is also referred to as electromagnetic torque, when there is armature supply stream in wind power generating set armature winding
Out-of-date, the armature winding of energization is known as electromagnetic torque by electromagnetic force, the power and the product of Motor armature slug radius in magnetic field.
After generator loads electromagnetic torque, could generate electricity output power.Here feathering can be understood as in fan parking brake process
In, by paddle page by 0 ° of rotation to 90 ° of process, finally make blade leading edge facing the wind, rear is directed toward cabin.If it is assumed that blower
Received wind energy is W1, the rotation function W3 that the turning effort that grid-connected rear wind energy generates generator generates, grid-connected rear power generation
The torque of machine is W4, and the energy that unit is offset is W2, according to conservation of energy principle, then has the conservation of energy of grid-connected rear generator public
Formula are as follows:
W1=W3+W4+W2 (1)
From formula (1) as can be seen that since during putting away the oars, feathering speed is fixed, so the decline of W1 is at the uniform velocity
, and in stopping process, since revolving speed decline is very fast, the torque value decline obtained according to revolving speed-torque curve is also fast, this
In to can be understood as W4 decline very fast, and after torque value decline is excessive, according to conservation of energy formula shown in formula (1), due to suitable
Paddle is lasting process, so the revolving speed of wind power generating set will not rise again, it is to be understood that will not be increased again for W3, it is more
Remaining energy can be converted into W2, act on wind power generating set and pylon, due to the rotary inertia of wind power generating set impeller
Also very big, so the impact force generated also can be very big, and this impact force can act on completely in wind power generating set, can be to wind-force
Generating set generates certain vibratory impulse.
Fig. 2 shows the motor speed and torque for not using the fan parking process of the halt control method or device at any time
Between change curve, abscissa is sampling time interval, can choose sampling time interval be 50ms；Ordinate is torque
Value, is indicated with square block line, wherein for the ease of curve comparison, takes 4 times of the numerical value of tachometer value to become and torque in curve graph
The comparable numerical value of the numerical value of value is indicated with rectangle block line；In stopping process, as shown in Fig. 2, since C point, time sequence in figure
Curved portion corresponding to column 33~35, since revolving speed decline is very fast, it is seen that torque drop is caused to obtain quickly.
Fig. 3 shows the unit vibration curve in the fan parking process for not using the halt control method or apparatus system
Scheme, it is consistent in the time series and Fig. 2 that Fig. 3 abscissa represents；As shown in Figure 3: rectangle block line represents generator in level side
Upward Oscillation Amplitude, square block line represent the Oscillation Amplitude of generator in the vertical direction, and triangle line represents the tooth of generator
The Oscillation Amplitude of roller box in the horizontal direction, cross symbols line represent the Oscillation Amplitude on gear-box vertical direction, in revolving speed, turn
During square rapid decrease, gear-box horizontal direction and generator horizontal direction produce vibration by a relatively large margin.
In view of the above situation described in conjunction with Fig. 1 to Fig. 3, the invention proposes a kind of halt control method and devices.
Fig. 4 shows the flow chart of the halt control method of one embodiment of the invention, which includes: step
S410 determines the revolving speed when operation of preset wind power generating set and the biggish area of torque-down rates in torque corresponding relationship curve
Between, using the lesser inflection point of tachometer value corresponding in the both ends inflection point in section as critical point, one or one is chosen according to critical point
It is a above with reference to point, wherein the corresponding torque value of reference point or tachometer value are less than the corresponding torque value of critical point or tachometer value；This
In the faster section of torque-down rates can have an one or more, selecting such section is due to the torque in the section
Decline it is too fast, be easy certain vibratory impulse is caused to generating set, so this section of region is selected to control torque.Ying Li
Solution, existing direct torque curve are mostly revolving speed and torque corresponding relationship curve, but when choosing critical point and reference point, by
In in wind power generating set stopping process, revolving speed and torque are at the stage being gradually reduced, and revolving speed at any time under
During the process of drop and torque decline at any time, torque or the faster section of revolving speed rate of descent are corresponding, so selecting
It takes when critical point and reference point in addition to that can also be become at any time using torque or revolving speed using revolving speed and torque corresponding relationship curve
Change experience curve to find and determine above-mentioned critical point and reference point.Step S420, acquisition wind-driven generator occur to shut down feelings
Revolving speed when condition, in revolving speed revolving speed corresponding higher than critical point, according to the corresponding torque of reference point and rotary speed data and wind-force
The practical torque for starting to shut down the moment of generating set and rotary speed data building opening upwards, dull shutdown control function；Here
As can be seen that the direct torque function of building contains only the direct torque function that function curve is opening upwards, because of opening
Since torque can be accordingly higher in downward direct torque function, it equally can also cause revolving speed decline too fast, equally be unfavorable for controlling
The vibratory impulse of wind power generating set processed.Step S430 obtains the corresponding torque value of revolving speed according to control function is shut down, using turning
Square value carries out shutdown control to wind-driven generator.In one example, which can be exported to the change in fan system
Oar system carries out the specific control of pitch.The above method passes through the shutdown Controlling model established, so that blower is quick in revolving speed
During decline, the decline for controlling torque is relatively slow, keeps generator torque decline more stable, to reduce in stopping process
To the vibratory impulse of wind power generating set due to caused by the mutation of torque.
Fig. 5 shows corresponding with torque according to a kind of motor speed of the fan parking process of the halt control method of embodiment
Graph of relation revolving speed and torque corresponding relationship curve, similar to Fig. 1, abscissa is revolving speed, unit rpm；Ordinate is to turn
Square, unit Nm.It include not using the torque curve 501 of the halt control method and using above-mentioned halt control method in figure
Stopping process direct torque curve 502.Wherein, do not use the halt control method torque curve 501 and Fig. 1 in revolving speed with
Torque corresponding relationship curve is identical, and direct torque when referring to that wind power generating set starting is grid-connected, and operating normally is bent
Line.Wherein, when not using the halt control method, according to T=9550p/n, wherein T is the torque of wind power generating set, and p is wind
The performance number of power generator group, n are that the revolving speed of generator needs to be added according to different tachometer values when wind power generating set is run
Torque value corresponding with tachometer value is carried, for same type of Wind turbines, this rotary speed-torque curve is also fixation,
When wind power generating set operates normally, needs to carry out direct torque according to this curve, be just able to achieve maximal power tracing；Revolving speed-
Torque curve is generally a series of data, in one example, can choose 13 groups of data points in curve, such as (T1, n1),
(T2, n2) ... (Tx, nx), wherein x is the data group number chosen.The master controller of wind power generating set inside controller,
Automatically the linear equation of arbitrary neighborhood point-to-point transmission is calculated, wind power generating set is according to the tachometer value actually measured later, and
Linear equation, finding out needs torque value to be loaded；For example, with (T1, n1), (T2, n2), for, the two point form straight line side of generation
Journey are as follows:
(n2-n1))/(y-n1)=(T2-T1)/(x-T1) (2)
Assuming that current generator tachometer value is n0, and n1 < n0 < n2, then master controller straight line according to shown in formula (2) at this time
Equation finds out the corresponding torque value of tachometer value n0 at this time；The calculation method of remaining range of speeds is similar with formula (2), herein no longer
It repeats.When using the halt control method, as shown in stopping process direct torque curve 502, when shutting down, wind-force is obtained
Generating set current tachometer value and torque value；It first chooses in Fig. 5, the region that 501A-B sections of curve declines as torque or revolving speed
The faster section of rate, then A point is corresponding torque value in the both ends inflection point in the region or the lesser inflection point of tachometer value as critical
Point, it is assumed that the D point in Fig. 5 is operation data when breaking down, and D point here can be in Fig. 5 greater than A point operation data
Any point.Choose the revolving speed not being less than using revolving speed on the torque curve 501 of the halt control method on the region of A point revolving speed
As another reference point, such as the E point in Fig. 5, wherein the selection of E point can be revolving speed less than A point, be greater than F point for value and torque value
Revolving speed region on any position, and the determination of E point coordinate can be calculated by formula (2) linear equation generated,
Here the corresponding torque of F point is off-grid torque, and by taking double-fed wind power generator group as an example, corresponding nominal torque is 8500Nm,
Off-grid torque is generally 300Nm.In one example, the function curve for shutting down control function passes through corresponding turn of all reference points
Square value and tachometer value can construct the control function of opening upwards according to D point, the tachometer value and torque value of E point here.One
In a example, which can be quadratic equation and is also possible to cubic equation.By taking quadratic function as an example, wind-power electricity generation
Unit can carry out direct torque according to this quadratic function in stopping process；If the coordinate (x0, w1) of D point, the coordinate of E point
For (x1, y1), wherein x0, w1, x1, y1 are known setting value, then according to the vertex formula equation of quadratic function
Y=a (x-h)2+k (3)
Wherein, a ≠ 0, a, h, k are constant, and the apex coordinate (h, k) of quadratic function may be configured as (x1, y1), i.e. h=x1,
(x0, w1) is then substituted into formula (3), can find out the value of a by k=y1, according to formula (3), can be found out revolving speed in stopping process, be turned
The corresponding relationship of square.According to this quadratic function, direct torque is carried out；In one example, can turn by newest generator
Fast value is updated in quadratic function, its corresponding torque value is found out, since in stopping process, generator speed value is gradually to become
Change and gradually decrease, so be also to gradually decrease according to the torque value that quadratic function is found out.In one example, main control
Device can be according to seek corresponding torque value using the rotary speed-torque curve of the halt control method, when according to two revolving speeds-
When the torque value that the relational expression of torque is found out is consistent, and generator speed value drops to the E point for calculating quadratic function, then switches back into
Not using the torque on the torque curve 501 of the halt control method, direct torque is carried out.
According to above-mentioned halt control method, when wind power generating set is shut down, during revolving speed decline, reduce
Torque-down rates keep generator torque decline more stable, send out caused by the mutation of torque in stopping process wind-force to reduce
The vibratory impulse of motor group；Wherein, the direct torque in stopping process is mainly under the corresponding revolving speed of B-A shown in Fig. 5
Faster region drops.Although torque value corresponding to the stopping process direct torque curve 502 of the halt control method is than identical
To correspond to wind torque value than slightly higher using the torque curve 501 of the halt control method when revolving speed, but since torque drop is oblique
Rate has become smaller very much, thus will not due to revolving speed decline and cause torque variation it is too fast；On the other hand, slightly higher torque value is also
Generator speed can be suitably reduced, plays certain booster action to downtime, and according to formula T=9550p/n,
In, T is the electromagnetic torque of generator, and unit Nm, p are the power of generator output, unit W；N is generator speed, single
Position is rpm；When tachometer value n, torque value T decline region are mitigated, power p variation also can relatively mitigate, and be according to formula p=UI, U
Fixed value, so p variation relatively mitigates, it is also smaller to the electric current I impact of current transformer and power grid.
In one embodiment, which further includes that the wind power generating set of judgement acquisition occurs to shut down situation
When revolving speed or torque: when revolving speed is higher than the corresponding revolving speed of critical point, obtain corresponding turn of revolving speed according to control function is shut down
Square.It is to be understood that due at the wind power generating set off-grid moment, torque value can remove suddenly becomes 0, as shown in figure 3, not having
When having using above-mentioned halt control method, the vibrating numerical of gear-box vertical direction produces bigger vibration.And according to formula
(1), due to during putting away the oars, feathering speed be it is fixed, so the decline of W1 be at the uniform velocity, and in stopping process, by
It suddenly disappears in W4, but feathering is lasting process, so the revolving speed of wind power generating set will not rise again, extra energy meeting
It is converted into W2, is acted on wind power generating set and pylon, to generate certain vibratory impulse to wind power generating set.For
The problem, in one embodiment, the halt control method further include when revolving speed and/or torque are close or equal to off-grid revolving speed
And/or when torque, vane angle adjustment signal is sent to pitch-controlled system.In one example, when revolving speed and/or torque are close or equal to
When off-grid revolving speed and/or torque, transmission is opened paddle signal and is sent to pitch-controlled system when determining that vane angle pulls back to specified vane angle value
Paddle signal is closed to pitch-controlled system.By the acquisition and observation to field operational data, paddle when wind power generating set off-grid is obtained
Angle value is generally no greater than 45 degree, remains to absorb certain wind energy, thus this halt control method wind power generating set shut down when,
Appropriate control is executed to vane angle, such as opens paddle in right amount or keeps vane angle constant.In this way, according to formula (1), due to wind power generating set
When off-grid, W4 suddenly disappears, and W3 is also declining, and the amplitude of decline is lower than the amplitude of W1 decline, thereby produces W2；So logical
It crosses and appropriate control is executed to vane angle, increase W3, to offset a part of W2.Fig. 6 is shown to be controlled according to a kind of shutdown of embodiment
The vane angle of method changes over time curve graph, as shown in fig. 6, abscissa is the time, unit 50ms, ordinate is vane angle value,
Wherein, at the time of t0 is that wind power generating set starts feathering shutdown；T1 is the wind power generating set off-grid moment, and off-grid is specifically sentenced
It is disconnected to be less than off-grid tachometer value according to for generator speed, it can rule of thumb be judged such as 1030rpm or generator torque
Less than off-grid torque value, such as 300Nm；The blade vane angle value of pitch-controlled system when Ang0 is off-grid, Ang2 is wind power generating set
Completion shut down vane angle value, when blade position feathering arrive Ang2 when, it is believed that feathering shut down completion, generally 89 degree；Ang1 is
The target position of off-grid moment vane angle readjustment, and vane angle readjustment amplitude 601 is numerically equal to Ang0-Ang1 after off-grid, and
Ang0 is greater than or equal to Ang1.In one example, when wind power generating set breaks down, wind generating set main control system
Control blade with certain speed feathering, such as 5 degrees seconds, meanwhile, master control system detect stopping process in tachometer value, torque value,
Vane angle value.When the tachometer value of wind power generating set is close or equal to off-grid torque close or equal to off-grid revolving speed or torque value,
The vane angle value Ang0 of wind generating set main control system record at this time, such as the F point in Fig. 5, when revolving speed is lower than corresponding turn of F point
When speed value, wind power generating set executes off-grid operation.When tachometer value is less than off-grid revolving speed or torque value is less than off-grid torque,
Wind power generating set executes off-grid, and carry out simultaneously it is suitable open paddle control, control pitch-controlled system to 0 degree of direction variable pitch, open paddle
Amplitude generally can be 3~5 degree.Blade is opened into paddle to the position of Ang1.When blade opens paddle to Ang1, by target vane angle value
It is given as Ang2, executes remaining shutdown control.In one example, can also suspend feathering movement keeps vane angle constant, temporarily
Stop executing remaining shutdowns and controlling after feathering acts one end time.It can be effectively reduced according to this method since motor off-grid is made
At torque suddenly cut out impact of the bring to unit.
Fig. 7 shows a kind of structural block diagram of stop control apparatus provided in an embodiment of the present invention.The wind power generating set
Stop control apparatus 700, comprising: data processing unit 701, control function construction unit 702 and control unit 703, the data
Processing unit is configured to determine that in the revolving speed and torque corresponding relationship curve when preset wind power generating set is run under torque
The biggish section of drop rate, using the lesser inflection point of tachometer value corresponding in the both ends inflection point in section as critical point, according to critical point
Choose or more than one reference point, wherein the corresponding torque value of reference point or tachometer value be less than the corresponding torque value of critical point or
Tachometer value；The control function construction unit is configured as revolving speed when situation occurs to shut down for acquisition wind-driven generator, in revolving speed height
When critical point corresponding revolving speed, start to shut down according to the corresponding torque of reference point and rotary speed data and wind power generating set are practical
The torque at moment and rotary speed data building opening upwards, dull shutdown control function；The control unit is configured as basis and stops
Machine control function obtains the corresponding torque value of revolving speed, carries out shutdown control to wind-driven generator using torque value.In an example
In, shutting down control function is quadratic function or cubic function.In one example, which further includes judging unit, is configured
To send vane angle adjustment signal to pitch-controlled system when revolving speed and/or torque are close or equal to off-grid revolving speed and/or torque.?
In one example, vane angle adjustment signal is to open paddle signal, vane angle keeps signal or close paddle signal.In one example, vane angle tune
Section signal includes opening paddle signal and closing paddle signal, and control unit is additionally configured to work as revolving speed and/or torque close or equal to off-grid
When revolving speed and/or torque, transmission opens paddle signal and sends when determining that vane angle pulls back to specified vane angle value to pitch-controlled system and close paddle
Signal is to pitch-controlled system.In one example, vane angle adjustment signal includes that vane angle keeps signal and closes paddle signal, and control unit is also
It is configured as sending vane angle when revolving speed and/or torque are close or equal to off-grid revolving speed and/or torque and keeping signal to variable pitch system
System sends after vane angle keeps signal predetermined hold-time and closes paddle signal to pitch-controlled system.It should be noted that the device with
This method is corresponding, and the two has the function of similar, can solve similar technical problem, therefore, the two is same or similar
Place repeat no more.
It can be set by calculating in conjunction at least part of Fig. 4 and Fig. 7 stop control apparatus described and halt control method
It is standby to realize.Fig. 8 shows the structural schematic diagram realized according to a kind of stop control apparatus of embodiment by calculating equipment.Such as Fig. 8
Shown, calculating equipment 800 includes: memory 804, processor 803 and output equipment 806, which calculates for storing
Machine executable instruction；The processor 803 is used to execute executing instruction for the storage of memory 804, executes instruction so that processor 803
Execute the halt control method of above-mentioned wind power generating set；806 output processor 803 of output equipment executes memory 804
The control instruction that generates after the executing instruction of storage.In one example, which can also include input equipment
801, input port 802 and output port 805.Wherein, input port 802, processor 803, memory 804 and output end
Mouth 805 is connected with each other by bus 810, and input equipment 801 and output equipment 806 pass through input port 802 and output end respectively
Mouth 805 is connect with bus 810, and then is connect with the other assemblies for calculating equipment 800.It should be noted that input terminal here
Mouth 802 and output port 805 can be indicated with I/O interface.Specifically, input equipment 801 is received from external input information,
And processor 803 is transmitted to for information is inputted by input port 802；Processor 803 is based on the calculating stored in memory 804
Machine executable instruction handles to generate output information input information, and output information is temporarily or permanently stored in and is deposited
In reservoir 804, output information is then transmitted to by output equipment 806 by output port 805；Output equipment 806 believes output
Breath is output to the outside for calculating equipment 800.
It is defeated when realizing the fan parking control device for combining Fig. 4 and Fig. 7 to describe by calculating equipment 800 shown in Fig. 8
Enter operational data of the equipment 801 from the sensor collection blower that blower each section is arranged in；Processor 803 is based on memory 804
The computer executable instructions of middle storage, calculate torque or vane angle.Then needing via output port 805 and output
Equipment 806 is directly exported to the executing agency of blower.
That is, stop control apparatus according to an embodiment of the present invention also may be implemented as including being stored with computer
The memory 804 of executable instruction；And processor 803, the processor 803, can be with when executing computer executable instructions
Realize the stop control apparatus for combining Fig. 4 and Fig. 7 to describe and halt control method.
In one example, the stop control apparatus of the wind power generating set can form wind-driven generator with pitch-controlled system
The shutdown control system of group, the control letter that the stop control apparatus which is used to receive the wind power generating set is sent
Number.
It needs to define, the invention is not limited to specific configuration described above and shown in figure and processing.Also,
For brevity, the detailed description to known method technology is omitted here.In the above-described embodiments, it has been described and illustrated several
Specific step is as example.But method process of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified after understanding spirit of the invention, modification and addition, or between changing the step
Sequentially.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware
With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This
A little functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Specially
Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not
It is considered as beyond the scope of this invention.
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 readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (11)
1. a kind of halt control method of wind power generating set characterized by comprising
The biggish area of torque-down rates in revolving speed and torque corresponding relationship curve when determining the operation of preset wind power generating set
Between, using the lesser inflection point of tachometer value corresponding in the both ends inflection point in the section as critical point, chosen according to the critical point
One or more reference points, wherein it is corresponding that the corresponding torque value of the reference point or tachometer value are less than the critical point
Torque value or tachometer value；
Revolving speed when situation occurs to shut down for the wind power generating set is acquired, is higher than corresponding turn of the critical point in the revolving speed
When fast, start to shut down turning for moment according to the corresponding torque of the reference point and rotary speed data and the wind power generating set are practical
Square and rotary speed data building opening upwards, dull shutdown control function；And
The corresponding torque value of the revolving speed is obtained according to the shutdown control function, using the torque value to the wind-power electricity generation
Unit carries out shutdown control.
2. the halt control method of wind power generating set as described in claim 1, which is characterized in that the shutdown control function
It is quadratic function or cubic function.
3. the halt control method of wind power generating set as described in claim 1, which is characterized in that further include:
When the revolving speed of the wind power generating set and/or the torque are close or equal to off-grid revolving speed and/or torque, paddle is sent
Angle adjustment signal is to pitch-controlled system.
4. the halt control method of wind power generating set as claimed in claim 3, which is characterized in that the vane angle adjustment signal
Including opening paddle signal and closing paddle signal, when the revolving speed and/or the torque are close or equal to off-grid revolving speed and/or torque,
Paddle signal is opened described in transmission sends the pass paddle signal when determining that vane angle pulls back to specified vane angle value to the pitch-controlled system
To the pitch-controlled system.
5. the halt control method of wind power generating set as claimed in claim 3, which is characterized in that the vane angle adjustment signal
Signal is kept including vane angle and closes paddle signal, when the revolving speed and/or the torque are close or equal to off-grid revolving speed and/or torque
When, it sends the vane angle and signal is kept to send the pass after vane angle keeps signal predetermined hold-time to the pitch-controlled system
Paddle signal is to the pitch-controlled system.
6. a kind of stop control apparatus of wind power generating set characterized by comprising
Data processing unit is configured to determine that revolving speed and torque corresponding relationship curve when the operation of preset wind power generating set
The middle biggish section of torque-down rates, using the lesser inflection point of tachometer value corresponding in the both ends inflection point in the section as critical
Point chooses one or more reference points according to the critical point, wherein the corresponding torque value of the reference point or tachometer value
Torque value corresponding less than the critical point or tachometer value；
Control function construction unit is configured as acquiring revolving speed when situation occurs to shut down for the wind power generating set, described
When revolving speed is higher than the critical point corresponding revolving speed, sent out according to the corresponding torque of the reference point and rotary speed data and the wind-force
The practical torque for starting to shut down the moment of motor group and rotary speed data building opening upwards, dull shutdown control function；And
Control unit is configured as obtaining the corresponding torque value of the revolving speed according to the shutdown control function, utilizes described turn
Square value carries out shutdown control to the wind power generating set.
7. the stop control apparatus of wind power generating set as claimed in claim 6, which is characterized in that the shutdown control function
It is quadratic function or cubic function.
8. the stop control apparatus of wind power generating set as claimed in claim 6, which is characterized in that it further include judging unit,
It is configured as when the revolving speed of the wind power generating set and/or the torque are close or equal to off-grid revolving speed and/or torque, hair
Send vane angle adjustment signal to pitch-controlled system.
9. the stop control apparatus of wind power generating set as claimed in claim 8, which is characterized in that the vane angle adjustment signal
Including opening paddle signal and closing paddle signal, described control unit is additionally configured to approach or wait when the revolving speed and/or the torque
When off-grid revolving speed and/or torque, paddle signal is opened described in transmission to the pitch-controlled system, when judgement vane angle pulls back to specified vane angle
When value, the pass paddle signal is sent to the pitch-controlled system.
10. the stop control apparatus of wind power generating set as claimed in claim 8, which is characterized in that the vane angle adjusts letter
It number include that vane angle keeps signal and closes paddle signal, described control unit is additionally configured to connect when the revolving speed and/or the torque
When closely or being equal to off-grid revolving speed and/or torque, sends the vane angle and keep signal to the pitch-controlled system, when vane angle keeps signal
After predetermined hold-time, the pass paddle signal is sent to the pitch-controlled system.
11. a kind of stop control apparatus of wind power generating set characterized by comprising
Memory, for storing computer executable instructions；
Processor, it is described to execute instruction so that the processor right of execution for executing executing instruction for the memory storage
Benefit require 1 to any one of claim 5 wind power generating set halt control method；
Output equipment executes the control instruction generated after the executing instruction of memory storage for exporting the processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081774.7A CN108119301B (en) | 2016-11-30 | 2016-11-30 | Shutdown control method and device of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081774.7A CN108119301B (en) | 2016-11-30 | 2016-11-30 | Shutdown control method and device of wind generating set |
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| Publication Number | Publication Date |
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| CN108119301A CN108119301A (en) | 2018-06-05 |
| CN108119301B true CN108119301B (en) | 2019-05-17 |
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| CN201611081774.7A Active CN108119301B (en) | 2016-11-30 | 2016-11-30 | Shutdown control method and device of wind generating set |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519326B (en) * | 2018-12-06 | 2022-02-22 | 成都阜特科技股份有限公司 | Control method and system of wind turbine generator and wind turbine generator |
| CN110778451B (en) * | 2019-11-15 | 2021-11-23 | 东方电气风电有限公司 | Safety protection method and system for large wind generating set |
| CN112072701B (en) * | 2020-09-08 | 2022-08-05 | 武汉大学 | Improved torque limit control method based on double-fed wind turbine generator |
| CN112761874B (en) * | 2021-02-04 | 2022-09-16 | 湘电风能有限公司 | Safe shutdown method and system and wind driven generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080136188A1 (en) * | 2005-06-21 | 2008-06-12 | Repower Systems Ag | Method and system for regulation of the rotational speed of a rotor on a wind turbine |
| CN105781877A (en) * | 2016-03-04 | 2016-07-20 | 北京金风科创风电设备有限公司 | Shutdown control method, device and system of wind generating set |
| CN106121914A (en) * | 2016-08-26 | 2016-11-16 | 三重型能源装备有限公司 | The closing method of blower fan and system under extremity |
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2016
- 2016-11-30 CN CN201611081774.7A patent/CN108119301B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080136188A1 (en) * | 2005-06-21 | 2008-06-12 | Repower Systems Ag | Method and system for regulation of the rotational speed of a rotor on a wind turbine |
| CN105781877A (en) * | 2016-03-04 | 2016-07-20 | 北京金风科创风电设备有限公司 | Shutdown control method, device and system of wind generating set |
| CN106121914A (en) * | 2016-08-26 | 2016-11-16 | 三重型能源装备有限公司 | The closing method of blower fan and system under extremity |
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