CN108180110A - The control method of blade of wind-driven generator - Google Patents

The control method of blade of wind-driven generator Download PDF

Info

Publication number
CN108180110A
CN108180110A CN201711405758.3A CN201711405758A CN108180110A CN 108180110 A CN108180110 A CN 108180110A CN 201711405758 A CN201711405758 A CN 201711405758A CN 108180110 A CN108180110 A CN 108180110A
Authority
CN
China
Prior art keywords
wind
driven generator
speed
power generating
state
Prior art date
Application number
CN201711405758.3A
Other languages
Chinese (zh)
Inventor
姚娜
赵佩佩
Original Assignee
内蒙古久和能源装备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 内蒙古久和能源装备有限公司 filed Critical 内蒙古久和能源装备有限公司
Priority to CN201711405758.3A priority Critical patent/CN108180110A/en
Publication of CN108180110A publication Critical patent/CN108180110A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/065Rotors characterised by their construction, i.e. structural design details
    • F03D1/0675Rotors characterised by their construction, i.e. structural design details of the blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/02Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022Adjusting aerodynamic properties of the blades
    • F03D7/0224Adjusting blade pitch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/02Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0276Controlling rotor speed, e.g. variable speed
    • Y02E10/721
    • Y02E10/723

Abstract

The present invention relates to a kind of control method of blade of wind-driven generator, which includes:Wind speed is cut according to mean wind speed and wind-driven generator first, determines the first variable pitch action of the wind-driven generator;According to wind-driven generator rotating speed and grid-connected rotating speed, the first rotational angle of the auxiliary wing of back segment is determined;After the auxiliary wing of the back segment rotates the first rotational angle, according to the wind-driven generator rotating speed and the grid-connected rotating speed, wind power generating set first state is determined, wherein, wind power generating set first state includes waiting wind standby mode and state of generating electricity by way of merging two or more grid systems.The blade of wind-driven generator of the present invention belongs to the structure that aerofoil profile can automatically control, higher lift resistance ratio can be obtained by adjusting the geometry of vane airfoil profile, and the operation of wind power generating set is become smaller by the constraint of wind speed range, it can make that the incision wind speed of wind power generating set becomes smaller, cut-out wind speed becomes larger, the catch wind efficiency of wind power generating set is improved with this, and then improves its output power.

Description

The control method of blade of wind-driven generator

Technical field

The present invention relates to technical field of wind power generation, and in particular to a kind of control method of blade of wind-driven generator.

Background technology

Wind energy is increasingly paid attention to as a kind of clean regenerative resource by countries in the world.Its amount of accumulateing is huge, the whole world Wind energy be about 2.74 × 109Mw, wherein available wind energy is 2 × 107Mw, than the water energy total amount that can be developed and used on the earth Also want 10 times big.Wind-power electricity generation is that one kind converts wind energy into mechanical energy, and the electromechanical assembly of electric energy is reconverted by mechanical energy.Profit Air vane is driven to rotate with wind-force, then promoted the speed of rotation by booster engine, to promote electrical power generators.

Wind generating set blade structure affects the ability and generating effect that wind power generating set absorbs wind energy, at present Horizontal axis wind-driven generator is made of substantially 3 blades, and when wind speed reaches incision wind speed (Vin), wind power generating set starts Variable pitch acts, and blade feathering finally turns to given variable pitch angle position and (0 ° is generally, depending on wind power generating set trip bar Part), wind power generation set grid-connection power generation;When wind speed reaches cut-out wind speed (Vout), wind power generating set starts centainly to become Paddle rate is put away the oars to 90 °, and into strong wind safe shutdown state, normal operation is cutting wind speed with cutting to wind power generating set as required Go out in the wind speed section of wind speed.

As depicted in figs. 1 and 2, wherein Fig. 1 shows for a kind of structure of fixed aerofoil profile blade of wind-driven generator in the prior art It is intended to, Fig. 2 is a kind of fixation aerofoil profile structure diagram of blade of wind-driven generator in the prior art;For changeless blade Airfoil structure, under same wind regime and the angle of attack, lift coefficient, resistance coefficient and lift resistance ratio are certain, and wind power generating set is only It is the action of single variable pitch to adjust the size that wind wheel absorbs wind energy, into generating electricity by way of merging two or more grid systems or the operating modes such as safe shutdown.Pitch-controlled system Under normal circumstances, operating angle is limited in scope value, generally 0 degree~90 degree, when wind generator set blade pitch angle adjusts During to 0 degree or 90 degree of extreme positions, wind power generating set cannot change wind energy conversion system absorption wind energy by variable pitch action to adjust again Size and output effect so that wind power generating set operation is affected by wind speed, and then influences wind power generating set Output power.

Invention content

To solve technological deficiency and deficiency of the existing technology, the present invention provides a kind of controls of blade of wind-driven generator Method processed.

Specifically, the control method for a kind of blade of wind-driven generator that one embodiment of the invention proposes, including:

Wind speed is cut according to mean wind speed and wind-driven generator first, determines that the first variable pitch of the wind-driven generator moves Make;

According to wind-driven generator rotating speed and grid-connected rotating speed, the first rotational angle of the auxiliary wing of back segment is determined;

After the auxiliary wing of the back segment rotates the first rotational angle, according to the wind-driven generator rotating speed and grid-connected turn described Speed determines wind power generating set first state, wherein, wind power generating set first state includes waiting wind standby mode and grid-connected hair Electricity condition.

In one embodiment of the invention, determine that the first variable pitch action of the wind-driven generator includes:

When the mean wind speed is more than the described first incision wind speed, then the wind-driven generator starts the first variable pitch and moves Make.

In one embodiment of the invention, determine that the first rotational angle of the auxiliary wing of back segment includes:

When the wind-driven generator rotating speed is less than the grid-connected rotating speed, then the auxiliary wing of the back segment rotates the first angle of rotation Degree.

In one embodiment of the invention, according to the wind-driven generator rotating speed and the grid-connected rotating speed, wind-force is determined Generating set first state includes:

When the wind-driven generator rotating speed is less than the grid-connected rotating speed, then it is standby to be in the wind such as described for wind power generating set State;

When the wind-driven generator rotating speed is more than the grid-connected rotating speed, then wind power generating set is in described and generates electricity by way of merging two or more grid systems State.

In one embodiment of the invention, it after wind power generating set is in the state of generating electricity by way of merging two or more grid systems, further includes:

The auxiliary wing of the back segment is rotated backward into the first rotational angle and restores the initial position to rotation.

In one embodiment of the invention, first variable pitch is moved as the blade is adjusted most 0 degree.

The control method for another blade of wind-driven generator that one embodiment of the invention proposes, including:

According to the mean wind speed and the first cut-out wind speed, the second rotational angle of the auxiliary wing of back segment is determined;

After the auxiliary wing of the back segment rotates second rotational angle, according to the wind-driven generator rotating speed and wind-power electricity generation The maximum running speed of machine determines the second state of wind power generating set, wherein, the second state of wind power generating set includes power generation and transports Row state and shutdown cut out state.

In one embodiment of the invention, according to the mean wind speed and the first cut-out wind speed, the auxiliary wing of back segment is determined Second rotational angle includes:

When the mean wind speed is more than first cut-out wind speed, then the auxiliary wing of the back segment rotates second angle of rotation Degree.

In one embodiment of the invention, turned according to the maximum operation of the wind-driven generator rotating speed and wind-driven generator Speed determines that the second state of wind power generating set includes:

When the wind-driven generator rotating speed is more than the maximum running speed of the wind-driven generator, wind-driven generator starts Second variable pitch acts, and the second variable pitch action is that the blade is adjusted most A degree, wherein, 0 degree<A<90 degree.

In one embodiment of the invention, turned according to the maximum operation of the wind-driven generator rotating speed and wind-driven generator Speed after determining the second state of wind power generating set, further includes:

The relationship of the mean wind speed and the second cut-out wind speed is judged, when the mean wind speed cuts out wind less than described second When fast, then the wind power generating set is in the generator operation state;

When the mean wind speed is more than second cut-out wind speed, then the wind power generating set is in the shutdown and cuts It does well.

Compared with prior art, beneficial effects of the present invention:

1. the blade of the wind-driven generator of the present invention belongs to the structure that aerofoil profile can automatically control, when carrying out variable pitch action The geometry of vane airfoil profile can be adjusted, higher lift resistance ratio can be obtained by adjusting the geometry of vane airfoil profile, and It so that the operation of wind power generating set is become smaller by the constraint of wind speed range, can become the incision wind speed of wind power generating set Small, cut-out wind speed becomes larger, and the catch wind efficiency of wind power generating set is improved with this, and then improves its output power.

2. the wind power generating set of the present invention can be in wind speed less than the incision wind speed of fixed aerofoil profile wind power generating set Under the conditions of reach grid-connected rotating speed, and the lift of wind generator set blade is improved, it is near and obtain a higher liter resistance Than the incision wind speed of i.e. wind power generating set of the invention is less than the incision wind speed of fixed aerofoil profile wind power generating set.

3. the cut-out wind speed of the wind power generating set of the present invention reaches the cut-out wind speed of fixed aerofoil profile wind power generating set, Variable pitch can need to only control the auxiliary wing action of back segment, wind power generating set still can safely be operated in solid first without action of putting away the oars Under the cut-out wind speed for determining aerofoil profile wind power generating set, when the auxiliary wing rotational angle of back segment reaches setting limit value, if wind speed continues to increase Greatly, variable pitch starts action of putting away the oars again, i.e., under the cooperation of the auxiliary wing of back segment, has widened the operating air velocity range of wind power generating set, Wind power generating set is contributed to obtain more wind energies.

Description of the drawings

Fig. 1 is a kind of structure diagram of fixed aerofoil profile blade of wind-driven generator in the prior art;

Fig. 2 is a kind of fixation aerofoil profile structure diagram of blade of wind-driven generator in the prior art;

Fig. 3 is a kind of flow diagram of the control method of blade of wind-driven generator provided in an embodiment of the present invention;

Fig. 4 is a kind of airfoil structure schematic diagram for becoming aerofoil profile wind-driven generator provided in an embodiment of the present invention;

Fig. 5 is a kind of structure diagram for becoming the auxiliary wing rotation of aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention;

Fig. 6 is a kind of leading portion main wing structure diagram for becoming aerofoil profile blade of wind-driven generator provided in an embodiment of the present invention;

Fig. 7 is a kind of guide rail structure schematic diagram provided in an embodiment of the present invention;

Fig. 8 is a kind of auxiliary wing structure schematic diagram of back segment for becoming aerofoil profile blade of wind-driven generator provided in an embodiment of the present invention;

Fig. 9 is becomes the grid-connected flow diagram of aerofoil profile wind-driven generator under a kind of incision wind speed provided in an embodiment of the present invention;

Figure 10 is another structural representation for becoming the auxiliary wing rotation of aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention Figure;

Figure 11 is to become aerofoil profile wind-driven generator under a kind of cut-out wind speed provided in an embodiment of the present invention to shut down flow diagram;

Figure 12 is the structural representation of the auxiliary wing rotation of another change aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention Figure.

Specific embodiment

Further detailed description is done to the present invention, but embodiments of the present invention are not limited to reference to specific embodiment This.

Embodiment one

Fig. 3~Fig. 9 is referred to, Fig. 3 is a kind of control method of blade of wind-driven generator provided in an embodiment of the present invention Flow diagram, Fig. 4 are a kind of airfoil structure schematic diagram for becoming aerofoil profile wind-driven generator provided in an embodiment of the present invention, and Fig. 5 is A kind of structure diagram for becoming the auxiliary wing rotation of aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention, Fig. 6 are real for the present invention A kind of leading portion main wing structure diagram of change aerofoil profile blade of wind-driven generator of example offer is applied, Fig. 7 is provided for the embodiment of the present invention A kind of guide rail structure schematic diagram, Fig. 8 be it is provided in an embodiment of the present invention it is a kind of become aerofoil profile blade of wind-driven generator back segment it is auxiliary Wing structure schematic diagram, Fig. 9 show to become the grid-connected flow of aerofoil profile wind-driven generator under a kind of incision wind speed provided in an embodiment of the present invention It is intended to.A kind of control method of blade of wind-driven generator provided by the invention is described in detail in the present embodiment, the controlling party Method includes:

Wind speed is cut according to mean wind speed and wind-driven generator first, determines the first variable pitch action of wind-driven generator;

According to wind-driven generator rotating speed and grid-connected rotating speed, the first rotational angle of the auxiliary wing of back segment is determined;

After the auxiliary wing of back segment rotates the first rotational angle, wind is determined according to the relationship of wind-driven generator rotating speed and grid-connected rotating speed Power generator group first state, wherein, wind power generating set first state includes waiting wind standby mode and state of generating electricity by way of merging two or more grid systems.

The control method adjusts the angle changing of the auxiliary wing of back segment according to extraneous wind regime so that the change aerofoil profile wind-force hair of this implementation The incision wind speed of motor is less than the incision wind speed of fixed aerofoil profile wind-driven generator so that wind-driven generator can enter grid-connected in advance Generating state has widened the range of wind-driven generator operating air velocity.

Wherein, the mean wind speed of wind-driven generator be preferably set to 3sec mean wind speeds, 30sec mean wind speeds and 10min mean wind speeds, wherein, 3sec mean wind speeds refer to that when the air speed value that acquisition is read be that 1s acquires one, then 3sec is common 3 air speed values are acquired, then 3sec mean wind speed=3 air speed value summation/3;30sec mean wind speeds refer to the wind read when acquisition Fast value is 1s acquisitions one, then 30sec acquires 30 air speed values altogether, then 30sec mean wind speed=30 air speed value summation/ 30;10min mean wind speeds refer to that when the air speed value that acquisition is read be that 1s acquires one, then 10min acquires 600 wind speed altogether It is worth, then 10min mean wind speed=600 air speed value summation/600.

First incision wind speed is to become aerofoil profile wind power generating set to start the minimum wind speed to generate electricity by way of merging two or more grid systems.

The action of first variable pitch is that the blade for becoming aerofoil profile wind-driven generator is adjusted to 0 degree.

Grid-connected rotating speed refers to that wind-driven generator rotating speed enters the tachometer value set when generating electricity by way of merging two or more grid systems state.

Wind standby mode is waited to refer to the state that wind-driven generator rotating speed is also not up to before grid-connected rotating speed, in the state, Wind power generating set does not capture enough wind energies also, in etc. enough wind energy transformations to be obtained be mechanical energy, promoted with this The state of generator speed.

The state of generating electricity by way of merging two or more grid systems, which refers to wind power generating set and is incorporated to power supply grid, to be started to generate electricity.

Become aerofoil profile blade structure for wind driven generator, as shown in figure 4, mainly including leading portion main wing 1, the auxiliary wing 2 of back segment, girder 3 And push rod driving unit 4, wherein, the auxiliary wing 2 of back segment is movably connected on the back edge of leading portion main wing 1, and girder 3 is set to leading portion main wing On 1 vertical section, the first end of push rod driving unit 4 is rotationally connected on girder 3, and the second end of push rod driving unit 4 turns It is dynamic to be connected on the inner wall of the auxiliary wing 2 of back segment.

When the auxiliary wing 2 of back segment is needed to change angle, the auxiliary wing 2 of back segment is made along preceding by the thrust of push rod driving unit 4 Section 2 connecting portion of the wing auxiliary with back segment of main wing 1 is moved, as shown in figure 5, the auxiliary wing 2 of back segment is made to rotate θ angles, even if back segment is auxiliary The wing 2 turns to position β from position alpha.The angle that the auxiliary wing 2 of back segment rotates can ensure in the feelings for becoming aerofoil profile wind-driven generator not stall Under condition, the entire camber of blade is made to change so that lift improves, while the angle rotated will not make resistance also therewith Increase finally obtains a higher lift resistance ratio.

Wherein, leading portion main wing 1 is the front section of blade integral airfoil structure, and is fixed aerofoil profile, as shown in fig. 6, preceding Section main wing 1 includes leading portion main wing ontology 11, guide rail 12 and position-limit mechanism 13, after guide rail 12 is fixedly installed on leading portion main wing ontology 11 On the inner wall at end, and a plurality of guide rail 12, the length and leading portion of guide rail 12 are provided with along the circumferencial direction of leading portion main wing ontology 11 Main wing 1 and the auxiliary wing 2 of back segment are fitted and connected the of same size of position, and 15% that the length of guide rail 12 is blade integral airfoil chord length ~20%, the wing 2 auxiliary with back segment of leading portion main wing 1 is connected, and movable device 22 can led by guide rail 12 and movable device 22 It slides back and forth or rolls in rail 12.

Wherein, position-limit mechanism 13 is fixedly installed on the both ends of guide rail 12, after movable device 22 triggers position-limit mechanism 13, Illustrate that auxiliary 2 turned position of the wing of back segment has arrived at extreme position, push rod driving unit 4 stops expanding-contracting action, position-limit mechanism at this time 13 shield, and prevent auxiliary 2 rotational angle of the wing of back segment excessive, damage.

Preferably, as shown in fig. 7, guide rail 12 is grooved rail.

Preferably, position-limit mechanism 13 is limit switch, when movable device 22 is close to limit switch, limit switch transmission letter Number to push rod driving unit 4, push rod driving unit 4 receives after the signal of limit switch that just stopping acts.

After the auxiliary wing 2 of back segment is the hindfoot portion of blade integral airfoil structure, and the auxiliary wing 2 of back segment is embedded in leading portion main wing 1 Edge so that leading portion main wing 1 realizes seamless applying connection with the auxiliary wing 2 of back segment, as shown in figure 8, the auxiliary wing 2 of back segment includes the auxiliary wing of back segment Ontology 21 and movable device 22, wherein, movable device 22 is fixedly installed in the back edge of auxiliary 21 outer wall of wing ontology of back segment, is used for Cooperation is completed to change the angle changing of the auxiliary wing 2, wherein, movable device 22 is movably arranged in guide rail 12, and movable device 22 exists It can be slided or be rolled in guide rail 12, when the auxiliary wing 2 of back segment is needed to change angle, pass through pushing away for push rod driving unit 4 Power effect makes movable device 22 be slided or be rolled along guide rail 12, and the auxiliary wing 2 of back segment is driven to be transported outward with respect to leading portion main wing 1 It is dynamic, so as to which the angle for making the auxiliary wing 2 of back segment deflects, by the angle that the auxiliary wing 2 of back segment is controlled to change, make wind power generating set Operation is become smaller by the constraint of wind speed range, can make that the incision wind speed of wind power generating set becomes smaller, cut-out wind speed becomes larger, with this The catch wind efficiency of wind power generating set is improved, and then improves its output power.

Preferably, movable device 22 is idler wheel or sliding block.

Preferably, the thickness of the auxiliary wing 2 of back segment is less than the thickness of leading portion main wing 1.

Girder 3 is fixedly installed on the vertical section of leading portion main wing 1, and girder 3 is the primary load bearing structure of blade, carries leaf Most of bending load of piece, wherein, girder 3 uses sandwich.

Push rod driving unit 4 is push rod driving mechanism, and push rod driving mechanism can be multiple, inside push rod driving mechanism Line handspike motor is provided with, the flexible of push rod driving mechanism is realized using line handspike motor, the first of push rod driving mechanism End is connected to by universal joint or oscillating bearing on girder 3, and second end is hinged on by hinge on the inner wall of the auxiliary wing 2 of back segment, Pass through the flexible angle aerofoil profile 2 to be controlled to rotate of push rod driving mechanism.

Preferably, push rod driving mechanism is connected on the center of girder 3.

Preferably, push rod driving mechanism is hydraulic push rod driving mechanism.

The auxiliary wing 2 of back segment of the present embodiment is the tail portion of rotatable vane airfoil profile structure, to keep the flowing water of integral blade Line style, the auxiliary wing 2 of back segment, which uses, to be embedded in one section of its front end in leading portion main wing 1, and by being mounted on inside the auxiliary wing 2 of back segment Push rod driving mechanism cooperation can turn an angle, with this change adjustment vane airfoil profile camber.

First rotational angle is angle, θ, that is, controls the auxiliary wing of back segment from minimum camber rotational angle θ, as shown in figure 5, The auxiliary wing of back segment is then made to turn to position β from position alpha after the auxiliary wing rotation first angle of back segment.

Determine that the first variable pitch action of wind-driven generator includes:When mean wind speed is more than the first incision wind speed, then wind-force Generator starts the action of the first variable pitch.

Determine that the first rotational angle of the auxiliary wing of back segment includes:When wind-driven generator rotating speed is less than grid-connected rotating speed, then back segment The auxiliary wing rotates the first rotational angle, to become aerofoil profile wind-driven generator compared to fixed aerofoil profile by adjusting the angle of the auxiliary wing of back segment Wind-driven generator enters the state of generating electricity by way of merging two or more grid systems in advance.

According to wind-driven generator rotating speed and grid-connected rotating speed, determine that wind power generating set first state includes:

When wind-driven generator rotating speed is less than grid-connected rotating speed, then wind power generating set, which is in, waits wind standby mode;

When wind-driven generator rotating speed is more than grid-connected rotating speed, then wind power generating set is in state of generating electricity by way of merging two or more grid systems.

After wind power generating set is in state of generating electricity by way of merging two or more grid systems, further include:

The auxiliary wing of back segment is rotated backward into the first rotational angle and restores the initial position to rotation, as shown in Figure 5 so that after Duan Fuyi restores from position β to position alpha after rotating backward the first rotational angle θ, convenient for when become aerofoil profile wind-driven generator into The operating air velocity range of wind-driven generator is widened when entering under cut-out wind speed by adjusting the angle of the auxiliary wing of back segment again, is absorbed more Wind energy.

Preferably, the first incision wind speed for becoming aerofoil profile wind-driven generator is set as Vin ', fixed aerofoil profile wind-driven generator Second incision wind speed be set as Vin.

Specifically, as shown in figure 9, being described in detail in the case where cutting wind speed to becoming the grid-connected flow of aerofoil profile wind-driven generator:

Step 1 judges whether mean wind speed is less than the first incision wind speed Vin ';

Step 1.1, if so, becoming aerofoil profile wind-driven generator the wind standby mode such as enters;

Step 1.2, if it is not, then become aerofoil profile wind-driven generator carry out the first variable pitch action, adjust blade of wind-driven generator To 0 degree.

Preferably, mean wind speed is 30sec mean wind speeds.

Step 2 judges to become whether aerofoil profile wind-driven generator rotating speed is less than grid-connected rotating speed;

Step 2.1 is generated electricity by way of merging two or more grid systems state if it is not, then becoming aerofoil profile wind-driven generator and entering;

Step 2.2, if so, the auxiliary wing of control back segment rotates the first rotational angle, ensure becoming aerofoil profile wind-driven generator not In the case of stall, the entire camber of blade is made to change so that lift improves, while the angle rotated will not make resistance Power also increases therewith, finally obtains a higher lift resistance ratio.

Step 3 judges to become whether aerofoil profile wind-driven generator rotating speed is less than grid-connected rotating speed;

Step 3.1, if so, becoming aerofoil profile wind-driven generator the wind standby mode such as enters;

Step 3.2 is generated electricity by way of merging two or more grid systems state if it is not, then becoming aerofoil profile wind-driven generator and entering.

Specifically, the rotating speed of this time-varying aerofoil profile wind-driven generator can in advance reach simultaneously compared to fixed aerofoil profile wind-driven generator Net rotating speed, that is, becoming the of the first incision wind speed Vin ' of aerofoil profile wind-driven generator compared to fixed aerofoil profile wind-driven generator Two incision wind speed Vin are advanced by the first difference speed Δ V, that is, become the size of the first incision wind speed Vin ' of aerofoil profile wind-driven generator The difference for cutting wind speed Vin and the first difference speed Δ V equal to the second of fixed aerofoil profile wind-driven generator, therefore the present embodiment Become second incision wind speed Vin drops of the first incision wind speed Vin ' compared to fixed aerofoil profile wind-driven generator of aerofoil profile wind-driven generator Low first difference speed Δ V.

The present embodiment controls the blade construction of adjustment aerofoil profile using the operating condition of extraneous wind regime and wind-driven generator, The purpose for widening wind-driven generator operating air velocity range is realized by changing blade construction adjustment aerofoil profile.

Present embodiments provide a kind of example of the control method of blade of wind-driven generator, those skilled in the art can be with Easily deduce, variable pitch action is from the auxiliary wing of back segment under different operating modes, and the priority of the two action is different, therefore by simple The variable pitch action method for realizing this patent different from the auxiliary wing sequence of movement of back segment is adjusted, only simple deformation, should not recognize To be new innovation and creation.

Embodiment two

Figure 10~Figure 12 is referred to, Figure 10 is auxiliary for another change aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention The structure diagram of wing rotation, Figure 11 are to become aerofoil profile wind-driven generator under a kind of cut-out wind speed provided in an embodiment of the present invention to shut down Flow diagram, Figure 12 are that another structure for becoming the auxiliary wing rotation of aerofoil profile wind-driven generator back segment provided in an embodiment of the present invention is shown It is intended to.The present embodiment is on the basis of above-described embodiment, and emphasis is to the controlling party of the change aerofoil profile wind-driven generator under cut-out wind speed Method is described in detail.The control method, including:

According to mean wind speed and the first cut-out wind speed, the second rotational angle of the auxiliary wing of back segment is determined;

After the auxiliary wing of back segment rotates the second rotational angle, run according to wind-driven generator rotating speed and the maximum of wind-driven generator Rotating speed determines the second state of wind power generating set, wherein, the second state of wind power generating set includes generator operation state and shutdown Cut out state.

The control method adjusts the angle changing of the auxiliary wing of back segment according to extraneous wind regime so that when mean wind speed is more than this implementation Change aerofoil profile wind-driven generator the first cut-out wind speed when, adjustment the auxiliary wing of back segment angle wind-driven generator is enable to delay entrance Shutdown cuts out state, has widened the range of wind-driven generator operating air velocity.

Wherein, when the mean wind speed of fixed aerofoil profile wind-driven generator is 10Min mean wind speeds, fixed aerofoil profile wind-power electricity generation First cut-out wind speed of machine is set as Vout1;When the mean wind speed of fixed aerofoil profile wind-driven generator is 3Sec mean wind speeds, Gu The first cut-out wind speed for determining aerofoil profile wind-driven generator is set as Vout2;When the mean wind speed of change aerofoil profile wind-driven generator is 10Min During mean wind speed, the second cut-out wind speed for becoming aerofoil profile wind-driven generator is set as Vout1 ';When putting down for change aerofoil profile wind-driven generator When equal wind speed is 3Sec mean wind speeds, the second cut-out wind speed for becoming aerofoil profile wind-driven generator is set as Vout2 '.

First cut-out wind speed be fixed aerofoil profile wind power generating set from power grid cut out to safe shutdown when air speed value.

Second rotational angle is angle η, i.e., makes the auxiliary wing of back segment from minimum camber after the auxiliary wing rotation second angle of back segment Rotational angle η, as shown in Figure 10, the control auxiliary wing of back segment turn to position γ from position alpha so that blade lift increases, resistance Increase, but resistance increase is larger, and lift resistance ratio reduces, and blade receives wind energy reduction, is equivalent to and reaches solid in actually measured wind speed When the first cut-out wind speed for determining aerofoil profile wind-driven generator is Vout1 or Vout2, becoming aerofoil profile wind-driven generator can be first without putting away the oars Action only needs the auxiliary wing action of back segment, and becoming aerofoil profile wind-driven generator still can safely be operated in original fixed aerofoil profile wind-power electricity generation Under the strong wind cut-out wind speed of machine.

Maximum running speed refers to that wind power generating set allows the rotating speed upper limit value of normal operation.

Generator operation state refers to that after wind-driven generator enters state of generating electricity by way of merging two or more grid systems wind-driven generator constantly obtains Wind energy makes wind-driven generator export corresponding power under different rotating speeds value and conveys electric energy to power grid.

Shutdown cuts out state and refers to that become aerofoil profile wind-driven generator cuts out from power grid, and final variable pitch is put away the oars to 90 degree, power generation Machine rotating speed is reduced to 0, and wind power generating set is shut down.

According to mean wind speed and the first cut-out wind speed, determine that the second rotational angle of the auxiliary wing of back segment includes:Work as mean wind speed During more than the first cut-out wind speed, then the auxiliary wing of back segment rotates the second rotational angle, and wind-driven generator is enable to delay and is cut into shutdown It does well, has widened the range of wind-driven generator operating air velocity.

According to wind-driven generator rotating speed and the maximum running speed of wind-driven generator, the second state of wind power generating set is determined Including:When wind-driven generator rotating speed is more than the maximum running speed of wind-driven generator, wind-driven generator starts the second variable pitch and moves Make.

Wherein, the action of the second variable pitch refers to the blade of wind-driven generator adjusting the angle A, wherein 0 degree<A<90 degree.

According to wind-driven generator rotating speed and the maximum running speed of wind-driven generator, the second state of wind power generating set is determined Later, it further includes:

Judge the relationship of mean wind speed and the second cut-out wind speed, when mean wind speed is less than the second cut-out wind speed, then wind-force Generating set is in generator operation state;

When mean wind speed is more than the second cut-out wind speed, then wind power generating set, which is in shut down, cuts out state.

Wherein, the second cut-out wind speed be become aerofoil profile wind power generating set from power grid cut out to safe shutdown when air speed value.

The present embodiment becomes aerofoil profile wind-force when the wind speed measured reaches the first cut-out wind speed of fixed aerofoil profile wind-driven generator Generator can only need the auxiliary wing action of back segment, becoming aerofoil profile wind-driven generator still can safely be operated in first without action of putting away the oars Originally under the strong wind cut-out wind speed of fixed aerofoil profile wind-driven generator.

Specifically, as shown in figure 11, flow is cut out to change aerofoil profile wind-driven generator shutdown to be described in detail:

Step 1 judges whether mean wind speed is more than the first cut-out wind speed;

Preferably, mean wind speed is 3sec mean wind speeds or 10Min mean wind speeds.

Step 1.1 judges that wind speed or 3Sec when whether 10Min mean wind speeds are more than the first cut-out wind speed for Vout1 are put down Whether equal wind speed is more than wind speed when the first cut-out wind speed is Vout2;

Step 1.1.1, if it is not, then becoming aerofoil profile wind-driven generator continues generator operation state;

Step 1.1.2, if so, the auxiliary wing of control back segment rotates the second rotational angle, that is, the auxiliary wing of back segment is controlled to be rotated from position alpha To position γ so that blade lift increases, and resistance also increases, but resistance increase is larger, and lift resistance ratio reduces, and blade receives wind energy and subtracts It is small, be equivalent to actually measured wind speed reach fixed aerofoil profile wind-driven generator the first cut-out wind speed be Vout1 or Vout2 When, the auxiliary wing action of back segment can only be needed first without action of putting away the oars by becoming aerofoil profile wind-driven generator, and becoming aerofoil profile wind-driven generator still can be with It is safely operated under the strong wind cut-out wind speed of original fixed aerofoil profile wind-driven generator.

The control auxiliary wing of back segment continues to rotate, as schemed until the angle of the auxiliary wing rotation of back segment reaches the limit value of setting Shown in 12, that is, until reaching position δ.

Step 2 judges whether wind-driven generator rotating speed is less than the maximum running speed of wind-driven generator;

Step 2.1, if so, becoming aerofoil profile wind-driven generator continues generator operation state;

Step 2.2, if it is not, then carrying out the second variable pitch action.

Step 3 judges whether mean wind speed is more than the second cut-out wind speed;

Step 3.1 judges that wind speed or 3Sec when whether 10Min mean wind speeds are more than the second cut-out wind speed for Vout1 ' are put down Whether equal wind speed is more than wind speed when the second cut-out wind speed is Vout2 ';

Specifically, the size for becoming the second cut-out wind speed of aerofoil profile wind-driven generator is equal to the of fixed aerofoil profile wind-driven generator The sum of one cut-out wind speed and the second difference speed Δ V '.

Step 3.1.1, if it is not, then becoming aerofoil profile wind-driven generator continues generator operation state;

Step 3.1.2, if so, becoming aerofoil profile wind-driven generator carries out third variable pitch action, make blade of wind-driven generator tune Whole to 90 degree, change aerofoil profile wind-driven generator enters shutdown and cuts out state.

The change aerofoil profile wind-driven generator of the present embodiment is under the cooperation of the auxiliary wing of back segment, and cut-out wind speed is compared to fixed aerofoil profile wind The cut-out wind speed increase of power generator, has widened the operating air velocity range of wind-driven generator, wind-driven generator is contributed to obtain more Windy energy.

Present embodiments provide a kind of example of the control method of blade of wind-driven generator, those skilled in the art can be with Easily deduce, variable pitch action is from the auxiliary wing of back segment under different operating modes, and the priority of the two action is different, therefore by simple The variable pitch action method for realizing this patent different from the auxiliary wing sequence of movement of back segment is adjusted, only simple deformation, should not recognize To be new innovation and creation.

In conclusion specific case used herein is to a kind of blade of wind-driven generator provided in an embodiment of the present invention The principle and embodiment of control method is expounded, and the explanation of above example is only intended to help to understand side of the invention Method and its core concept;Meanwhile for those of ordinary skill in the art, thought according to the present invention, in specific embodiment And there will be changes in application range, in conclusion the content of the present specification should not be construed as limiting the invention, this hair Bright protection domain should be subject to appended claim.

Claims (10)

1. a kind of control method of blade of wind-driven generator, which is characterized in that including:
Wind speed is cut according to mean wind speed and wind-driven generator first, determines the first variable pitch action of the wind-driven generator;
According to wind-driven generator rotating speed and grid-connected rotating speed, the first rotational angle of the auxiliary wing of back segment is determined;
After the auxiliary wing of the back segment rotates the first rotational angle, according to the wind-driven generator rotating speed and the grid-connected rotating speed, really Determine wind power generating set first state, wherein, wind power generating set first state includes waiting wind standby mode and the shape that generates electricity by way of merging two or more grid systems State.
2. control method according to claim 1, which is characterized in that determine the first variable pitch action of the wind-driven generator Including:
When the mean wind speed is more than the described first incision wind speed, then the wind-driven generator starts the action of the first variable pitch.
3. control method according to claim 1, which is characterized in that determine that the first rotational angle of the auxiliary wing of back segment includes:
When the wind-driven generator rotating speed is less than the grid-connected rotating speed, then the auxiliary wing of the back segment rotates the first rotational angle.
4. control method according to claim 1, which is characterized in that according to the wind-driven generator rotating speed and described grid-connected Rotating speed determines that wind power generating set first state includes:
When the wind-driven generator rotating speed is less than the grid-connected rotating speed, then wind power generating set is in described and waits the standby shape of wind State;
When the wind-driven generator rotating speed is more than the grid-connected rotating speed, then wind power generating set is in the shape that generates electricity by way of merging two or more grid systems State.
5. control method according to claim 4, which is characterized in that be in the shape that generates electricity by way of merging two or more grid systems in wind power generating set After state, further include:
The auxiliary wing of the back segment is rotated backward into the first rotational angle and restores the initial position to rotation.
6. control method according to claim 1, which is characterized in that the blade is is adjusted by the first variable pitch action Most 0 degree.
7. a kind of control method of blade of wind-driven generator, which is characterized in that including:
According to the mean wind speed and the first cut-out wind speed, the second rotational angle of the auxiliary wing of back segment is determined;
After the auxiliary wing of the back segment rotates second rotational angle, according to the wind-driven generator rotating speed and wind-driven generator Maximum running speed determines the second state of wind power generating set, wherein, the second state of wind power generating set includes generator operation shape State and shutdown cut out state.
8. control method according to claim 7, which is characterized in that according to the mean wind speed and the first cut-out wind speed, Determine that the second rotational angle of the auxiliary wing of back segment includes:
When the mean wind speed is more than first cut-out wind speed, then the auxiliary wing of the back segment rotates second rotational angle.
9. control method according to claim 7, which is characterized in that according to the wind-driven generator rotating speed and wind-power electricity generation The maximum running speed of machine determines that the second state of wind power generating set includes:
When the wind-driven generator rotating speed is more than the maximum running speed of the wind-driven generator, wind-driven generator starts second Variable pitch acts, and the second variable pitch action is that the blade is adjusted most A degree, wherein, 0 degree<A<90 degree.
10. control method according to claim 7, which is characterized in that sent out according to the wind-driven generator rotating speed and wind-force The maximum running speed of motor after determining the second state of wind power generating set, further includes:
The relationship of the mean wind speed and the second cut-out wind speed is judged, when the mean wind speed is less than second cut-out wind speed When, then the wind power generating set is in the generator operation state;
When the mean wind speed is more than second cut-out wind speed, then the wind power generating set is in the shutdown and cuts out shape State.
CN201711405758.3A 2017-12-22 2017-12-22 The control method of blade of wind-driven generator CN108180110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711405758.3A CN108180110A (en) 2017-12-22 2017-12-22 The control method of blade of wind-driven generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711405758.3A CN108180110A (en) 2017-12-22 2017-12-22 The control method of blade of wind-driven generator

Publications (1)

Publication Number Publication Date
CN108180110A true CN108180110A (en) 2018-06-19

Family

ID=62546704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711405758.3A CN108180110A (en) 2017-12-22 2017-12-22 The control method of blade of wind-driven generator

Country Status (1)

Country Link
CN (1) CN108180110A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030011197A1 (en) * 2001-07-10 2003-01-16 Matthew Earley Wind (Water) turbine with centrifugal weight control
CN102155356A (en) * 2011-03-22 2011-08-17 国电联合动力技术有限公司 Method for controlling running of wind generating set based on speed-regulating front end of electromagnetic coupler
CN102305180A (en) * 2011-08-31 2012-01-04 国电联合动力技术有限公司 Control method and system of differential gear box speed regulation type synchro wind generating set
CN102906418A (en) * 2010-04-09 2013-01-30 维斯塔斯风力系统有限公司 Wind turbine
CN105986961A (en) * 2016-04-28 2016-10-05 华北电力大学 Power optimal control method for variable-speed and variable-pitch wind turbine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030011197A1 (en) * 2001-07-10 2003-01-16 Matthew Earley Wind (Water) turbine with centrifugal weight control
CN102906418A (en) * 2010-04-09 2013-01-30 维斯塔斯风力系统有限公司 Wind turbine
CN102155356A (en) * 2011-03-22 2011-08-17 国电联合动力技术有限公司 Method for controlling running of wind generating set based on speed-regulating front end of electromagnetic coupler
CN102305180A (en) * 2011-08-31 2012-01-04 国电联合动力技术有限公司 Control method and system of differential gear box speed regulation type synchro wind generating set
CN105986961A (en) * 2016-04-28 2016-10-05 华北电力大学 Power optimal control method for variable-speed and variable-pitch wind turbine

Similar Documents

Publication Publication Date Title
CA2851915C (en) System and method for controlling a wind farm
DK2306003T3 (en) System and methods for controlling a wind turbine
US7312537B1 (en) Methods and apparatus for supplying and/or absorbing reactive power
ES2411355T5 (en) Restriction of power of wind turbines
CN102345570B (en) Rotor blade assembly
US6441507B1 (en) Rotor pitch control method and apparatus for parking wind turbine
EP1534952B1 (en) Variable length wind turbine blade
CN1268843C (en) Megawatt grade speed veriable constant frequency wind electric generator set
JP5022102B2 (en) Wind power generator, wind power generator system, and power generation control method for wind power generator
CN101493075B (en) Apparatus and method for reducing asymmetric rotor loads in wind turbines during shutdown
Karthikeyan et al. Review of aerodynamic developments on small horizontal axis wind turbine blade
DK2556249T3 (en) a wind turbine
US4832569A (en) Governed vane wind turbine
US7802968B2 (en) Methods and apparatus for reducing load in a rotor blade
US7581926B1 (en) Servo-controlled extender mechanism for extendable rotor blades for power generating wind and ocean current turbines
US10202964B2 (en) Method of yawing a rotor of a wind turbine
ES2373521T3 (en) RETRACTABLE SHOVEL STRUCTURE WITH A DIVIDED OUTPUT Flange.
EP1152148B1 (en) Airfoil profiles for wind turbines
US7828523B2 (en) Rotor blade for a wind turbine having a variable dimension
EP1612412B1 (en) Storm control for horizontal axis wind turbine
EP2432993B1 (en) A wind turbine and method
EP1772623A1 (en) Active flow control for wind turbine blades
US7566982B2 (en) Method for controlling and adjusting a wind turbine
EP1442216B1 (en) Rotor with extendable blades and control criteria therefor
KR100810990B1 (en) Power generation system having vertical wind turbine of jet-wheel type for wind power

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20180619