CN107939600A

CN107939600A - Wind generating set, feathering method thereof and computer storage medium

Info

Publication number: CN107939600A
Application number: CN201711404723.8A
Authority: CN
Inventors: 马磊; 李庆江; 李莉
Original assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Current assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2018-04-20

Abstract

The embodiment of the invention provides a wind generating set, a feathering method of the wind generating set and a computer storage medium, wherein the wind generating set comprises: wind wheel and cabin, the wind wheel includes wheel hub and blade, is provided with the oar system of becoming in the wheel hub, wherein still includes: a low voltage generator located within the hub, and/or within the nacelle; the low-voltage generator is used for generating electricity by utilizing mechanical energy generated by rotation of the wind wheel when feathering is needed, and providing electric energy for the variable pitch system; and the variable pitch system is electrically connected with the low-voltage generator and used for receiving electric energy so that the variable pitch motor runs to drive the blades to receive the propeller and the pitch angle of the blades is larger than a preset angle value. The low-voltage generator in the embodiment of the invention generates power by utilizing mechanical energy generated by rotation of the wind wheel and provides electric energy for the variable pitch system, so that even if the input side of a power grid is powered off, a backup power supply is abnormal and the like, the low-voltage generator still can provide electric energy for the variable pitch system, control the variable pitch motor to operate and further drive the blades to retract the propeller.

Description

Wind power generating set and its feathering method, computer-readable storage medium

Technical field

The present invention relates to technical field of wind power generation, more particularly to a kind of wind power generating set and wind power generating set is suitable Paddle method, computer-readable storage medium.

Background technology

Increasingly serious with increasingly exhausted and to environment the pollution of fossil energy, wind-power electricity generation is as new energy, positive place In the period of Road of Standardization is progressively gone at one and is comparatively fast developed.After the World Climate Conference of Copenhagen, " low-carbon ring Protect " become global energy development strategy, each state is all making action for energy-saving and emission-reduction, is going on " new energy " road one after another.

In Large-scale Wind Turbines, one major function of pitch-controlled system is to control wind by controlling the angle of blade The rotating speed of wheel, and then control the output power of wind-driven generator；Wind-driven generator during normal operation, when wind speed is less than unit volume When determining wind speed, blade is reached 0 degree of Angle Position by pitch-controlled system, carries out maximum power tracing；When wind speed exceedes unit rated wind speed When, the rotating speed that pitch-controlled system makes wind wheel by controlling the angle of blade is kept constant.

One major function of pitch-controlled system is to take on the service brake system function of unit, and electric variable propeller system passes through a variety of Means, mutiredundant design guarantee Wind turbine safe and stable operation are detected and controlled, being shut down caused by any failure can all make Blade feathering is to 90 degree of positions.It can be seen from the above that stability, security of the pitch-controlled system to unit, all play vital work With especially as air force brake, it is desirable to which pitch-controlled system must possess very high reliability and security.

However, in wind-driven generator operational process, it may occur that electric network power-fail, charger are abnormal, the standby of pitch-controlled system Situations such as abnormity of power supply, and these abnormal generations, it is likely that cause the blade of wind-driven generator can not be recovered to home (such as propeller pitch angle is 88 degree)；Especially in the case where electric network power-fail and backup power supply are abnormal, for electric variable pitch system For system, its degree of danger higher；If blade of wind-driven generator can not be recovered to home, under the action of the forces of the wind, meeting Make the rotating speed of wind-driven generator can not decline, trigger wind-driven generator hypervelocity that driving even occurs dangerous.

At present, can not put away the oars for blade of wind-driven generator, still without relatively good control method, only by leeward inclined Boat, i.e., make 90 degree of wind driven generator yaw by yaw, deviates wind direction, so that wind-driven generator rotating speed declines, realizes and shuts down； But the shortcomings that this method, is：Wind-driven generator is in normal course of operation, by the way that blade pitch angle is reached 0 degree of position, That is the force-bearing surfaces of blade are vertical with wind direction, to absorb maximal wind-energy；And wind-driven generator is during shutdown is put away the oars, blade Propeller pitch angle can become larger so that the wind energy that is absorbed of blade declines, rotating speed reduces, and if put away the oars to certain angle After (such as thering is 2 blades or 1 blade normally to put away the oars), it can make the force-bearing surfaces of blade vertical with wind direction again on the contrary, make Vane stress increases again, and such case, the wind speed round of wind-driven generator on the one hand can be caused to decline slowly, on the one hand also Wind-driven generator can be made to bear the load of bigger, be unfavorable for the safety of wind-driven generator.

In conclusion the prior art is when occurring, electric network power-fail, charger are abnormal, pitch-controlled system backup power supply is abnormal, electricity When net fluctuation causes device failure or burns, blade of wind-driven generator can not put away the oars, and under the action of the forces of the wind, can make wind-power electricity generation The rotating speed of machine can not decline, and trigger wind-driven generator hypervelocity that driving even occurs dangerous.

The content of the invention

In view of this, the present invention is intended to provide a kind of feathering method of wind power generating set and wind power generating set, calculating Machine storage medium, to solve the prior art when occur electric network power-fail, charger are abnormal, pitch-controlled system backup power supply is abnormal, When power network fluctuation causes device failure or burns, the problem of blade of wind-driven generator can not put away the oars.

To achieve these goals, the present invention provides following technical scheme：

A kind of wind power generating set, including：Wind wheel and cabin, the wind wheel include wheel hub and blade, are set in the wheel hub Pitch-controlled system is equipped with, the pitch-controlled system includes pitch motor, which further includes：In the wheel hub, and/ Or the low voltage generator in the cabin；

The low voltage generator, for when needing feathering, the mechanical energy rotated using the wind wheel to be generated electricity, and is the change Oar system provides electric energy；

The pitch-controlled system, is electrically connected with the low voltage generator, for receiving the electric energy so that the pitch motor Operation, to drive the blade to put away the oars so that the propeller pitch angle of the blade is more than preset angle angle value.

Preferably, the cabin includes high speed shaft and slow-speed shaft, and the low voltage generator is located in the cabin, and inputs End and the high speed shaft and/or the low speed axis connection.

Preferably, wind power generating set includes master controller, and positioned at the wheel hub and the company of the cabin (32) Connect the slip ring at position；

The output terminal of the low voltage generator is electrically connected by normally opened contact with the slip ring；

The master controller is electrically connected with the normally opened contact, for controlling the normally opened contact.

Preferably, the pitch-controlled system includes：Pitch control device, the DC power supply for pitch control device power supply, be The frequency converter of the pitch motor power supply；

When the low voltage generator is dc generator, the output terminal of the low voltage generator passes sequentially through described normally opened Contact, the slip ring are electrically connected with the frequency converter, for providing electric energy for the frequency converter and the DC power supply；

Alternatively, the output terminal of the low voltage generator passes sequentially through the normally opened contact, the slip ring and variable pitch electricity Mechatronics, for providing electric energy for the pitch motor.

Preferably, the pitch-controlled system includes charger；

When the low voltage generator is alternating current generator, the output terminal of the low voltage generator passes sequentially through described normally opened Contact, the slip ring are electrically connected with the pitch motor, for providing electric energy for the pitch motor；Or,

The output terminal of the low voltage generator passes sequentially through the normally opened contact, the three-phase of the slip ring and power grid input side Circuit is electrically connected, for providing electric energy for the charger.

Preferably, wind power generating set further includes the control system that declutches, under the control of the master controller, making The pitch motor is obtained to declutch.

Preferably, the control system that declutches includes：Declutch solenoid valve, relay and the branch that declutches；

One end of the solenoid valve that declutches is electrically connected with the output terminal of the relay, and the other end passes through the branch that declutches It is electrically connected with constant voltage source；

The branch that declutches is provided with normally-closed contact and the first normally opened contact；

The normally-closed contact, first normally opened contact are electrically connected with the master controller；

The master controller is used to control the signal of the relay input terminal so that the relay obtains electric, and controls The normally-closed contact closure is made, controls the first normally opened contact closure.

Preferably, the control system that declutches includes：Declutch solenoid valve, relay, redundancy relay, first declutch branch Declutch branch with second；

Described first branch that declutches is provided with normally-closed contact and the first normally opened contact；

Described second branch that declutches is connected with described first branch circuit parallel connection that declutches, and is provided with the second normally opened contact；

The redundancy relay is arranged in parallel with the relay, one end and the relay of the solenoid valve that declutches The output terminal of output terminal and the redundancy relay is electrically connected, and the other end declutches branch and institute by be connected in parallel described first Second branch that declutches is stated to be electrically connected with constant voltage source；

The normally-closed contact, first normally opened contact and second normally opened contact are electrically connected with the master controller Connect；

The master controller is used for the signal for controlling the relay and the redundancy relay input terminal so that described Relay and the redundancy relay obtain electric, and control second normally opened contact to close, control first normally opened contact to break Open, control the normally-closed contact to disconnect.

A kind of feathering method using above-mentioned wind power generating set, including：

The low voltage generator is controlled to be electrically connected with the pitch-controlled system so that the low voltage generator is the variable pitch system System provides electric energy；

The operation for the pitch motor that the pitch-controlled system includes is controlled, to drive the blade to put away the oars so that the blade Propeller pitch angle is more than preset angle angle value.

Preferably, the control low voltage generator is electrically connected with the pitch-controlled system, including：

Master controller control normally opened contact closure so that the output terminal of the low voltage generator passes through the normally opened contact It is electrically connected with slip ring.

Preferably, the control low voltage generator is electrically connected with the pitch-controlled system, is specifically included：

When the low voltage generator is dc generator,

Master controller controls the normally opened contact closure so that the output terminal of the low voltage generator passes sequentially through described Normally opened contact, the slip ring are electrically connected with frequency converter；

Or, master controller controls the normally opened contact closure so that the output terminal of the low voltage generator passes sequentially through The normally opened contact, the slip ring are electrically connected with the pitch motor；

When the low voltage generator is alternating current generator,

Master controller controls the normally opened contact closure so that the output terminal of the low voltage generator passes sequentially through described Normally opened contact, the slip ring are electrically connected with the pitch motor；

Or, master controller controls the normally opened contact closure so that the output terminal of the low voltage generator passes sequentially through The normally opened contact, the slip ring are electrically connected with the three-phase line of power grid input side.

Preferably, the operation for the pitch motor that the control pitch-controlled system includes, including：

It is electrically connected when the output terminal of the low voltage generator passes sequentially through the normally opened contact, the slip ring and the frequency converter Connect；Or, the output terminal of the low voltage generator passes sequentially through the normally opened contact, the triple line of the slip ring and power grid input side When road is electrically connected, the pitch control device that the pitch-controlled system includes controls the operation of the pitch motor；And

When the output terminal of the low voltage generator passes sequentially through the normally opened contact, the slip ring and pitch motor electricity During connection, the master controller controls the pitch motor to declutch by the slip ring.

A kind of computer-readable storage medium, is stored with the corresponding program of above-mentioned feathering method.

Compared with the prior art, the solution of the present invention has the advantages that：

Wind power generating set provided in an embodiment of the present invention is included in wheel hub, and/or the low pressure hair in cabin Motor, when needing feathering, which can utilize the mechanical energy power generation that wind wheel rotates, and provide electricity for pitch-controlled system Can, pitch-controlled system receives the electric energy of low voltage generator offer so that pitch motor is run, and is put away the oars with driving blade so that should The propeller pitch angle of blade is more than preset angle angle value.Compared with prior art, since the low voltage generator in the embodiment of the present invention is profit The mechanical energy rotated with wind wheel generates electricity, and provides electric energy for pitch-controlled system, therefore, even if the power down of power grid input side, charging occurs Machine is abnormal, backup power supply is abnormal, power network fluctuation causes device failure or burns when abnormal conditions, and the embodiment of the present invention still can Electric energy enough is provided for pitch-controlled system, after pitch-controlled system receives electric energy so that pitch motor is run, and is put away the oars, is made with driving blade The propeller pitch angle for obtaining blade is more than preset angle angle value, and then enables to the rotating speed of wind-driven generator quickly to decline, effectively Avoid wind-driven generator hypervelocity in addition occur driving danger；When the rotating speed of wind-driven generator declines to a certain extent, Since low voltage generator is that the mechanical energy rotated using wind wheel is generated electricity, the voltage of low voltage generator output at this time reduces, and is not enough to Electric energy is provided for pitch-controlled system, at this moment blade completes the feathering of wind power generating set still in home.

Also, low voltage generator of the embodiment of the present invention is located in cabin, and the input terminal and high speed shaft of the low voltage generator And/or low speed axis connection, in this way, the low voltage generator in the embodiment of the present invention can pass through high speed shaft or slow-speed shaft driving hair Electricity, i.e., generated electricity using the rotary force of blade itself, therefore need not increase extra energy storage or mechanical device, so system Simple in structure, cost is low, and easy to transformation and realizes.

Further, since wind power generating set provided in an embodiment of the present invention further includes the control system that declutches, in master control Under the control of controller so that pitch motor declutches, in this way, when generation electric network power-fail, charger exception, the standby of pitch-controlled system Abnormity of power supply, power network fluctuation cause device failure or burn when abnormal conditions, and master controller is declutched by control and controls system The work of system, well so that pitch motor declutches, and then completes follow-up process of putting away the oars.

The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments Substantially and it is readily appreciated that, wherein：

Fig. 1 is the control system architecture schematic diagram of existing wind-driven generator；

Fig. 2 is a kind of topological structure schematic diagram of existing pitch-controlled system；

Fig. 3 is a kind of structure diagram of wind power generating set provided in an embodiment of the present invention；

Fig. 4 is a kind of topological structure schematic diagram for wind power generating set that the embodiment of the present invention one provides；

Fig. 5 is a kind of topological structure schematic diagram of wind power generating set provided by Embodiment 2 of the present invention；

Fig. 6 is a kind of structure diagram of control system that declutches provided in an embodiment of the present invention；

Fig. 7 is the structure diagram of another control system that declutches provided in an embodiment of the present invention；

Fig. 8 is a kind of topological structure schematic diagram for wind power generating set that the embodiment of the present invention three provides；

Fig. 9 is a kind of feathering method flow diagram using above-mentioned wind power generating set provided in an embodiment of the present invention.

Illustrate the implication that each reference numeral of the embodiment of the present invention represents below：

101- pitch variable bearings；102- reducer gears；103- azimuth sensors；104- blower fan main shafts；105- gear reducers； 106- wheel hubs；107- pitch motors；108- encoders；109- pitch control devices；110- brake discs；111- brake valves；112- master Control controller；113- slip rings；114- blades；201- backup power supplies；203- frequency converters；204- direct currents (DC/DC) power supply；207- electricity Net input side；209- chargers；

31- wind wheels；32- cabins；33- pitch-controlled systems；301- low voltage generators；303- normally opened contacts；401- pitch drives Device；402- brake relays；The first normally opened contacts of 405-；503- normally-closed contacts；61- declutches branch；408- declutches solenoid valve； 502- relays；The input terminal of 501- relays；

The second normally opened contacts of 406-；71- first declutches branch；72- second declutches branch；404- redundancy relays；403- The input terminal of redundancy relay.

Embodiment

The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.

Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges Diction " comprising " refer to there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition One or more other features, integer, step, operation, element, component and/or their groups.It should be understood that when we claim member Part is " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or wireless coupling.It is used herein to arrange Taking leave "and/or" includes whole or any cell and all combinations of one or more associated list items.

Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific terminology), there is the meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also Understand, those terms such as defined in the general dictionary, it should be understood that have with the context of the prior art The consistent meaning of meaning, and unless by specific definitions as here, idealization or the implication of overly formal otherwise will not be used To explain.

The technical term used in some embodiment of the present invention is introduced first below.

Propeller pitch angle (Pitch Angle), also referred to as pitch angle, wind-driven generator uses variable pitch control, by adjusting blade Windward angle, to carry out the mode of power adjustment, propeller pitch angle refers to blade and wind wheel plane included angle；Wind-driven generator adjusts pitch The purpose at angle is mainly：

(1) start, under the action of the forces of the wind, obtain bigger moment of torsion, drive the blade of wind-driven generator to rotate；

(2) power output is limited, after rated wind speed, makes power steady, protects mechanically and electrically road system, while can drop Low load；

(3) aerodynamic brake is realized when putting away the oars, makes the rotating speed of blade quickly reduce, inertia force caused by avoiding mechanical brake is too Injury caused by greatly.

Dc generator (DC Generator), dc generator are the machines for mechanical energy being converted into direct current energy, it Direct current generator needed for excitation mainly as dc motor, electrolysis, plating, electric smelting, charging and alternating current generator etc..Directly The operation principle of stream generator is exactly the alternating electromotive force that generation is sensed in armature coil to be coordinated by commutator the commutation of brush Effect, is allowed to be changed into direct electromotive force. when drawing from brush end, because the electromotive force that brush A is drawn by commutator segment is all the time The electromotive force in the coil side of the N poles magnetic line of force is cut, so brush A has positive polarity all the time；As a same reason, brush B has negative all the time Polarity, so brush end energy lead direction is constant but the pulsating electromotive force of size variation.

Charger (Fast Charger), charger are to use high frequency electric source technology, are adjusted with advanced Intelligent Dynamic Charging technique, it uses constant current/constant voltage/small constant current intelligence three phases charging modes, has charge efficiency height, easy to operate, It is light-weight, it is small the features such as.For pitch-controlled system, the effect of charger is：When power grid has electricity, pass through the exchange of power grid Electricity is powered for charger, when charger works, is charged for backup power supply.

Backup power supply (Backup Power), backup power supply be it is a kind of effectively when preventing drive circuit without normal voltage one The there won't be any problem power supply that kind drives automatically, can extend circuit required voltage, can be worked normally with providing circuit.

Feathering (Feathering), refer to wind-driven generator break down after, the blade of wind-driven generator go to The close parastate in the direction of wind (also referred to as home, in specific angle, be directed to 89 degree of blade or so position/ Put away the oars in direction) control process.The wind energy that the blade of wind-driven generator absorbs at this time is minimum, can play aerodynamic brake Effect, makes wind-driven generator safe shutdown.

The present inventor studies the prior art, finds following problem.

As shown in Figure 1, Fig. 1 is the Control system architecture of wind-driven generator, which mainly includes：It is installed on wheel hub 106 Interior pitch variable bearings 101, gear reducer 105, pitch motor 107, encoder 108, pitch control device 109；Blade 114 passes through blade It is installed on pitch variable bearings 101 from strap bolt, and is rotated synchronously with pitch variable bearings 101；Pitch control device 109 is used to control variable pitch Motor 107 rotates；Pitch motor 107 is installed on gear reducer 105, for driving gear reducer 105 to rotate；Reducer gear 102 Engaged with pitch variable bearings 101, gear reducer 105, which rotates, can drive pitch variable bearings 101 to rotate, and pitch variable bearings 101 are used to drive leaf Piece 114 rotates.

As shown in Figure 1, encoder 108 is located at 107 afterbody of pitch motor, mechanically connect, use with 107 rotation axis of pitch motor In the angle value of measurement blade 114；Wherein, each blade corresponds to a gear reducer 105, pitch motor 107, pitch variable bearings respectively 101 and pitch control device 109.

As shown in Figure 1, azimuth sensor 103 is installed on 104 side of blower fan main shaft, for measuring the azimuth of wheel hub 106, Brake disc 110 is connected with blower fan main shaft 104, and brake valve 111 is located at 110 both sides of brake disc, for controlling brake disc 110 and wind turbine The braking of main shaft 104；Master controller 112 is used to control wind-driven generator to run, and controls pitch-controlled system to carry out out paddle, close Paddle, and control brake valve 111 declutch and band-type brake；Wherein, between master controller 112 and pitch control device 109, dynamic electricity Source circuit, communication line, theft-resistant link chain circuit, remaining hardware control lines etc., the power supply of these circuits or electric signal all pass through cunning Ring 113 is transmitted.

Specifically, as shown in Figure 1, when wind power generating set is run, wheel hub 106 is under the drive of blade 114, rotation fortune OK, master controller 112 provides power by the slip ring 113 being installed on blower fan main shaft 104 and wheel hub 106 for pitch-controlled system Power supply, and data interaction, control pitch-controlled system operation are carried out by the communications cable and pitch-controlled system, and pitch-controlled system is monitored in time Operation data.

As shown in Fig. 2, Fig. 2 is a kind of topological structure schematic diagram of existing pitch-controlled system, specifically includes and become using direct current The pitch-controlled system of frequency device, the structure include：Backup power supply 201, pitch motor 107, frequency converter 203, direct current (DC/DC) power supply 204th, pitch control device 109, power grid input side 207 and charger 209；Wherein：The effect of backup power supply 201 is power grid input side 207 when being abnormal, and continues as pitch motor 107 and provides power supply；Frequency converter 203 is used to control pitch motor 107 to run；DC/ D/C power 204 is powered by charger 209 or backup power supply 201, and 24V DC power supplies are provided for pitch control device 109.

As shown in Fig. 2, the "+" end of the output of charger 209, the "+" end of backup power supply 201, the "+" of DC/DC power supplys 204 End is electrically connected；The "-" end of the output of charger 209, the "-" end of backup power supply 201, the "-" end of DC/DC power supplys 204 are electrically connected.

The operation principle of existing pitch-controlled system is：

(1) under normal circumstances, power grid input side 207 provides AC power for charger 209, and charger 209 is standby electricity Source 201 is charged, and provides working power for frequency converter 203, DC/DC power supplys 204, and pitch control device 109 is in master controller Under control, carry out adjusting paddle control.

Specifically, as depicted in figs. 1 and 2, the implementation method that controls of paddle is adjusted to be：Variable pitch is controlled to drive by pitch control device 109 Dynamic device work, is run, pitch motor 107 drives pitch variable bearings 101 to rotate, variable pitch by variable pitch driver driving pitch motor 107 The rotation of bearing 101, drives the blade 114 being installed on pitch variable bearings 101 to be rotated, so as to be needed to change leaf according to control The propeller pitch angle of piece, realizes and adjusts paddle function.

(2) when pitch control device 109 detects that charger 209 breaks down or after exception, pitch-controlled system can be controlled to perform Feathering shutdown operation.

In the course of the research, inventor has found, when generation 207 power down of power grid input side, charger 209 is abnormal, standby is electric When source 201 is abnormal, the blade of wind-driven generator can not put away the oars, and under the action of the forces of the wind, can make the rotating speed of wind-driven generator can not Decline, trigger wind-driven generator hypervelocity that driving even occurs dangerous.

Technical scheme is introduced below in conjunction with the accompanying drawings.

A kind of the present inventor, in view of the shortcomings of the prior art, there is provided wind power generating set.

As shown in figure 3, Fig. 3 is a kind of structure diagram for wind power generating set that the present invention specifically provides, the wind-power electricity generation Unit includes：Wind wheel 31 and cabin 32, wind wheel 31 include wheel hub 106 and blade 114, pitch-controlled system 33 are provided with wheel hub 106, Pitch-controlled system 33 includes pitch motor 107 (not shown in figure, concrete structure can be found in shown in Fig. 1 or Fig. 2), implementation of the invention Similarly to the prior art, which is not described herein again for the setting of wind wheel 31, cabin 32 and pitch-controlled system 33 in example；Wheel hub 106 and blade 114 setting is referred to the setting form of Fig. 1.

Wind power generating set in the specific embodiment of the invention further includes other machinery component and electric component, these portions The specific setting of part is same as the prior art, since the part is not related to the improvement of the present invention, here no longer to this A little components illustrate.

As shown in figure 3, the wind power generating set that the present invention specifically provides further includes：In wheel hub 106, and/or it is located at Low voltage generator 301 in cabin 32；

Low voltage generator 301, for when needing feathering, the mechanical energy rotated using wind wheel 31 to be generated electricity, and is pitch-controlled system 33 provide electric energy；Pitch-controlled system 33, is electrically connected with low voltage generator 301, for receiving the electricity of the low voltage generator 301 offer Can so that pitch motor 107 is run, and is put away the oars with driving blade 114 so that the propeller pitch angle of the blade 114 is more than preset angle angle value.

When it is implemented, pitch motor 107 is run, put away the oars with driving blade 114, at this moment the propeller pitch angle of blade 114 is more than Preset angle angle value, preset angle angle value in the embodiment of the present invention is the home of the propeller pitch angle of blade, the angle at the position Angle value determines according to practical condition, such as can be 65 degree, i.e., when the propeller pitch angle of blade 114 is more than 65 degree, can recognize Feathering is completed for wind power generating set；Certainly, which is preferably 89 degree.

The wind power generating set that the present invention specifically provides is included in wheel hub, and/or the low pressure power generation in cabin Machine, when needing feathering, which can utilize the mechanical energy power generation that wind wheel rotates, and provide electricity for pitch-controlled system Can, pitch-controlled system receives the electric energy of low voltage generator offer so that pitch motor is run, and is put away the oars with driving blade so that should The propeller pitch angle of blade is more than preset angle angle value.Compared with prior art, since the low voltage generator of the present invention is turned using wind wheel Dynamic mechanical energy power generation, and provides electric energy for pitch-controlled system, therefore, even if the power down of generation power grid input side, charger extremely, after Stand-by power source is abnormal, power network fluctuation causes device failure or burns when abnormal conditions, and the present invention is specifically remained able to as variable pitch system System provides electric energy, after pitch-controlled system receives electric energy so that pitch motor is run, and is put away the oars with driving blade so that the paddle of blade Elongation is more than preset angle angle value, and then enables to the rotating speed of wind-driven generator quickly to decline, and effectively avoids wind The danger of driving even occurs for power generator hypervelocity.When the rotating speed of wind-driven generator declines to a certain extent, since low pressure is sent out Motor is the mechanical energy power generation rotated using wind wheel, and the voltage of low voltage generator output at this time reduces, and deficiency thinks pitch-controlled system Electric energy is provided, at this moment blade completes the feathering of wind power generating set still in home.

The wind power generating set that the present invention specifically provides is discussed in detail below in conjunction with the accompanying drawings.

It is preferred that the cabin 32 in the embodiment of the present invention includes high speed shaft and slow-speed shaft, low voltage generator 301 is located at machine In cabin 32, and the input terminal of the low voltage generator 301 and high speed shaft and/or low speed axis connection, high speed shaft and slow-speed shaft are in cabin Specific set-up mode in 32 is same as the prior art, and which is not described herein again；In this way, the low voltage generator of the embodiment of the present invention 301 can be generated electricity, therefore need not increase by high speed shaft or slow-speed shaft driving power generation using the rotary force of blade itself Add extra energy storage or mechanical device, so system structure is simple, cost is low, and easy to transformation and realizes.

Specifically, the slow-speed shaft in the embodiment of the present invention refers to the axis connected with wind wheel, and high speed shaft refers to by cabin 32 Gear-box speed change after the connecting shaft of (low velocity be changed at high speed) gear-box and generator.

Multiple embodiments of technical scheme are described below.

Embodiment one：

The specific embodiment of the invention one is arranged in cabin 32 with low voltage generator 301, the input of the low voltage generator 301 End with high speed shaft and/or low speed axis connection, and the low voltage generator 301 be dc generator exemplified by be introduced.

Wind power generating set in the specific embodiment of the invention includes master controller 112, and positioned at wheel hub 106 and machine Slip ring 113 at the link position in cabin 32；Master controller 112 in the specific embodiment of the invention, and the specific of slip ring 113 set It is same as the prior art to put mode, which is not described herein again.

As shown in figure 4, the output terminal of the low voltage generator 301 in the specific embodiment of the invention by normally opened contact 303 with Slip ring 113 is electrically connected；Master controller 112 is electrically connected with normally opened contact 303, for controlling normally opened contact 303；Specifically, it is main Controlling controller 112 according to actual needs, can control closure or the disconnection of normally opened contact 303, in this way, the specific embodiment of the invention It can easily realize the on or off between low voltage generator 301 and slip ring 113.

When it is implemented, as shown in figure 4, the normally opened contact 303 in the specific embodiment of the invention is by master controller 112 D.C. contactor is controlled.

As shown in figure 4, the pitch-controlled system 33 in the specific embodiment of the invention includes：Pitch control device 109, pitch motor 107th, it is the DC power supply 204 of the power supply of pitch control device 109, is the frequency converter 203 of the power supply of pitch motor 107；It is of the invention specific Pitch control device 109, pitch motor 107, DC power supply 204, the specific setting of frequency converter 203 and operation principle in embodiment Similarly to the prior art, which is not described herein again.

As shown in figure 4, the output terminal of specific embodiment of the invention mesolow generator 301 pass sequentially through normally opened contact 303, Slip ring 113 is electrically connected with frequency converter 203, for providing electric energy for frequency converter 203 and DC power supply 204.

When it is implemented, the supply voltage that the frequency converter 203 of the specific embodiment of the invention can work is relatively low, so of the invention The voltage of specific embodiment mesolow generator 301 can choose 50V to 100V, and power can choose the low-voltage direct hair of 4kW Motor；Certainly, in practical applications, the operating voltage of specific embodiment of the invention mesolow generator 301, and operating power It is also an option that other values, the specific embodiment of the invention is not done the operating voltage of low voltage generator 301, and operating power Limit.

The operation principle of the specific embodiment of the invention one is：

(1) under normal circumstances：

Master controller 112 controls normally opened contact 303 to disconnect, and low voltage generator 301 is not frequency converter 203 and direct current at this time Power supply 204 provides electric energy, and the course of work of wind power generating set is same as the prior art, and which is not described herein again.

(2) when electric network power-fail, charger exception, the backup power supply appearance exception of pitch-controlled system, power network fluctuation cause device Damage or burn when abnormal conditions cause blade not put away the oars：

Master controller 112 believes power grid by the communication data with pitch control device 109, and master controller 112 The detection of breath, control normally opened contact 303 close (connection)；Wherein, the working power of master controller 112 is by master control system UPS (Uninterruptible Power Supply, uninterrupted power source) is provided.

Due to the input terminal and high speed shaft and/or low speed axis connection of low voltage generator 301, so when the leaf of wind-driven generator When piece is in rotation status, the high speed shaft and/or slow-speed shaft of wind-driven generator can drive 301 rotary electrification of low voltage generator, when After normally opened contact 303 closes, the voltage that low voltage generator 301 exports is linked into frequency converter 203, and work is provided for frequency converter 203 Make power supply, while working power is provided for DC power supply 204, pitch control device 109 can work normally at this time, pitch-controlled system 33 Under the control of pitch control device 109, control pitch motor 107 is run, and then driving blade is put away the oars.

When blade rotational speed is reduced to certain value, on the one hand, cause low voltage generator 301 since blade rotational speed reduces Rotating speed reduces, so that the voltage of the low voltage generator 301 output reduces, deficiency thinks frequency converter 203 and DC power supply 204 Working power is provided, at this moment so that pitch control device 109 and pitch motor 107 are out of service.

On the other hand, since master controller 112 itself can detect the tachometer value of wind-driven generator, and can pass through With the propeller pitch angle of the communication check blade of pitch-controlled system, so when master controller 112 detects the tachometer value of wind-driven generator It is reduced to one to be scheduled on, and/or when propeller pitch angle of blade is more than home (is greater than 65 degree), master controller 112 can be with Control normally opened contact 303 disconnects, and disconnects the supply voltage of frequency converter 203 and DC power supply 204, so that pitch motor 107 It is out of service.

Embodiment two：

The specific embodiment of the invention two is arranged in cabin 32 with low voltage generator 301, the input of the low voltage generator 301 End with high speed shaft and/or low speed axis connection, and the low voltage generator 301 be dc generator exemplified by be introduced.

As shown in figure 5, pitch-controlled system 33 includes：Pitch control device 109, pitch motor 107, DC power supply 204, frequency converter 203；The output terminal of low voltage generator 301 in the specific embodiment of the invention passes sequentially through normally opened contact 303, slip ring 113 with becoming Paddle motor 107 is electrically connected, for providing electric energy for pitch motor 107.

Specifically, if the pitch motor 107 in the specific embodiment of the invention is direct current series-excited motor, low voltage generator The output terminal of 301 outputs, through normally opened contact 303, slip ring 113, the "+" with pitch motor 107, "-" end are electrically connected respectively successively.

It is preferred that the specific embodiment of the invention two provide wind power generating set further include the control system that declutches, for Under the control of master controller 112 so that pitch motor 107 declutches.

The operation principle of the specific embodiment of the invention two is：

(1) under normal circumstances：

Master controller 112 controls normally opened contact 303 to disconnect, and low voltage generator 301 is not frequency converter 203 and direct current at this time Power supply 204 provides electric energy.

Master controller 112 believes power grid by the communication data with pitch control device 109, and master controller 112 The detection of breath, control normally opened contact 303 close (connection)；Wherein, the working power of master controller 112 is by master control system UPS is provided.

Due to the input terminal and high speed shaft and/or low speed axis connection of low voltage generator 301, so when the leaf of wind-driven generator When piece is in rotation status, the high speed shaft and/or slow-speed shaft of wind-driven generator can drive 301 rotary electrification of low voltage generator, when After normally opened contact 303 closes, the voltage that low voltage generator 301 exports is linked into pitch motor 107, is carried for pitch motor 107 For working power；Meanwhile master controller 112 controls the control system that declutches by slip ring 113 so that pitch motor 107 declutches, Driving blade 114 is put away the oars after pitch motor 107 declutches so that the propeller pitch angle of the blade 114 is more than preset angle angle value.

When blade rotational speed is reduced to certain value, on the one hand, cause low voltage generator 301 since blade rotational speed reduces Rotating speed reduces, so that the voltage of the low voltage generator 301 output reduces, deficiency is with for the offer work electricity of pitch motor 107 Source, at this moment so that pitch motor 107 is out of service.

On the other hand, since master controller 112 itself can detect the tachometer value of wind-driven generator, and can pass through With the propeller pitch angle of the communication check blade of pitch-controlled system, so when master controller 112 detects the tachometer value of wind-driven generator It is reduced to one to be scheduled on, and/or when propeller pitch angle of blade is more than home (is greater than 65 degree), master controller 112 can be with Control normally opened contact 303 disconnects, and disconnects the supply voltage of pitch motor 107, so that pitch motor 107 is out of service and embraces Lock.

The structure of the control system that declutches in the specific embodiment of the invention two is discussed in detail below in conjunction with the accompanying drawings, and Master controller controls the control system that declutches by slip ring so that the specific control mode that pitch motor declutches.

Mode one：

As shown in fig. 6, the control system that declutches that the specific embodiment of the invention provides includes：Declutch solenoid valve 408, relay 502 and declutch branch 61；In addition, the control system that declutches in the specific embodiment of the invention further includes variable pitch driver 401, and The specific set-up mode of brake relay 402, variable pitch driver 401 and brake relay 402 similarly to the prior art, here not Repeat again.

As shown in fig. 6, the one end for the solenoid valve 408 that declutches is electrically connected with the output terminal of relay 502, the other end is by declutching Branch 61 is electrically connected with constant voltage source (power supply of 24V in such as figure)；

The branch 61 that declutches is provided with 503 and first normally opened contact 405 of normally-closed contact；

Normally-closed contact 503, the first normally opened contact 405 are electrically connected with master controller 112；

Master controller 112 is used for the signal for controlling 502 input terminal 501 of relay so that relay 502 must be electric, and controls Normally-closed contact 503 processed closes, and the first normally opened contact 405 of control closes.

Certainly, in present embodiment, the first normally opened contact 405 can also be controlled to close by pitch control device 109, the present invention Specific embodiment selects master controller 112 to control the first normally opened contact 405 to close, this way it is not necessary to 109 work of pitch control device Make, can also complete the control to the first normally opened contact 405.

As shown in fig. 6, the control logic for the control system that declutches that the specific embodiment of the invention provides is：

When electric network power-fail, charger is abnormal, pitch-controlled system backup power supply appearance is abnormal, power network fluctuation causes device failure Or burn when abnormal conditions cause blade not put away the oars, it is electric that master controller 112 controls relay 502 to obtain, wherein, it is normally closed to touch Point 503 is the normally-closed contact of relay 502, and master controller 112 controls normally-closed contact 503 to close, and control first is normally opened tactile The closure of point 405, the branch 61 that at this moment declutches turns on, so as to fulfill by declutch control of the master controller 112 to pitch motor 107.

Mode two：

As shown in fig. 7, the control system that declutches that the specific embodiment of the invention provides includes：Declutch solenoid valve 408, relay 502nd, redundancy relay 404, first branch 71 and second that declutches declutch branch 72；In addition, the pine in the specific embodiment of the invention Lock control system further includes variable pitch driver 401, and brake relay 402, variable pitch driver 401 and brake relay 402 Specific set-up mode similarly to the prior art, which is not described herein again.

As shown in fig. 7, first branch 71 that declutches is provided with 503 and first normally opened contact 405 of normally-closed contact；

Second branch 72 that declutches is connected in parallel with first branch 71 that declutches, and is provided with the second normally opened contact 406；

Redundancy relay 404 is arranged in parallel with relay 502, the one end for the solenoid valve 408 that declutches and the output of relay 502 The output terminal of end and redundancy relay 404 is electrically connected, and the other end is declutched by be connected in parallel first branch 71 and second that declutches Branch 72 is electrically connected with constant voltage source (power supply of 24V in such as figure)；

Normally-closed contact 503, the first normally opened contact 405 and the second normally opened contact 406 are electrically connected with master controller 112；

Master controller 112 is used for the signal for controlling the input terminal 501 of relay 502, and control redundancy relay 404 Input terminal 403 signal so that relay 502 and redundancy relay 404 it is electric, and control the second normally opened contact 406 to close, The first normally opened contact 405 is controlled to disconnect, control normally-closed contact 503 disconnects；At this moment the first normally opened contact 405 and normally closed is controlled at the same time Contact 503 disconnects, and to ensure that first branch 71 that declutches disconnects, avoids declutching 72 complete short circuit of branch with second.

Certainly, in present embodiment, the first normally opened contact 405 can also be controlled to disconnect by pitch control device 109, the present invention Specific embodiment selects master controller 112 to control the first normally opened contact 405 to disconnect, this way it is not necessary to 109 work of pitch control device Make, can also complete the control to the first normally opened contact 405.

As shown in fig. 7, the control logic for the control system that declutches that the specific embodiment of the invention provides is：

When electric network power-fail, charger is abnormal, pitch-controlled system backup power supply appearance is abnormal, power network fluctuation causes device failure Or burn when abnormal conditions cause blade not put away the oars, master controller 112 controls relay 502 and redundancy relay 404 Must be electric, wherein, normally-closed contact 503 is the normally-closed contact of relay 502, and master controller 112 controls normally-closed contact 503 to disconnect, Master controller 112 controls the second normally opened contact 406 to close, and at this moment second branch 72 that declutches turns on, so as to fulfill by master control control Declutch control of the device 112 processed to pitch motor 107.

The effect of normally-closed contact 503 is in the specific embodiment of the invention：It can prevent from stopping when redundancy relay 404 obtains electric The contact action of car relay 402, meanwhile, normally-closed contact 503 can make pitch-controlled system declutch and band-type brake in normal operation again Control the influence from redundancy relay 404；The specific embodiment of the invention controls redundancy relay 404 by master controller 112 The advantages of be：When pitch-controlled system PLC (Programmable Logic Controller, programmable logic controller (PLC)) failure, or After backup power supply failure, or 401 failure of variable pitch driver, it can still realize and normally put away the oars.

In addition, the specific embodiment of the invention controls normally-closed contact 503 to disconnect by master controller 112, so as to turn off first Declutch branch 71, prevents in the case of pitch-controlled system exception, and the first normally opened contact 405 cannot be disconnected normally.

In addition, the specific embodiment of the invention controls the first normally opened contact 405 to disconnect according to pitch control device 109, can When preventing that 112 program of master controller from malfunctioning, first branch 71 and second that declutches declutches 72 complete short circuit of branch.

Embodiment three：

The specific embodiment of the invention three is arranged in cabin 32 with low voltage generator 301, the input of the low voltage generator 301 End with high speed shaft and/or low speed axis connection, and the low voltage generator 301 be alternating current generator exemplified by be introduced.

The pitch-controlled system 33 of wind power generating set in the specific embodiment of the invention includes charger 209, pitch control device 109 and pitch motor 107.

As shown in figure 8, the output terminal of specific embodiment of the invention mesolow generator 301 pass sequentially through normally opened contact 303, Slip ring 113 is electrically connected with the three-phase line of power grid input side 207, for providing electric energy for charger 209.

Alternatively, the specific embodiment of the invention two provide wind power generating set further include the control system that declutches, for Under the control of master controller 112 so that pitch motor 107 declutches.

The operation principle of the specific embodiment of the invention three is：

(1) under normal circumstances：

Master controller 112 controls normally opened contact 303 to disconnect, and low voltage generator 301 does not provide electricity for charger 209 at this time Can, the course of work of wind power generating set is same as the prior art, and which is not described herein again.

Due to the input terminal and high speed shaft and/or low speed axis connection of low voltage generator 301, so when the leaf of wind-driven generator When piece is in rotation status, the high speed shaft and/or slow-speed shaft of wind-driven generator can drive 301 rotary electrification of low voltage generator, when After normally opened contact 303 closes, the voltage that low voltage generator 301 exports is linked into charger 209, and work is provided for frequency converter 203 Make power supply, while working power is provided for DC power supply 204, pitch control device 109 can work normally at this time, pitch-controlled system 33 Under the control of pitch control device 109, control pitch motor 107 is run, and then driving blade is put away the oars.

In addition, the specific embodiment of the invention three, which can also be master controller 112, controls the control system that declutches by slip ring 113 System so that pitch motor 107 declutches, and master controller 112 controls the concrete mode and above-described embodiment two for the control system that declutches Identical, which is not described herein again.

In actual production process, the specific embodiment of the invention three is preferably controlled using pitch control device 109, is specifically controlled Journey can be found in embodiment one, and compared with using master controller 112, this hair need not be set using the control of pitch control device 109 The control system that declutches in bright specific embodiment.

When blade rotational speed is reduced to certain value, on the one hand, cause low voltage generator 301 since blade rotational speed reduces Rotating speed reduces, so that the voltage of the low voltage generator 301 output reduces, it is insufficient to provide working power for charger 209, At this moment so that pitch control device 109 and pitch motor 107 are out of service.

On the other hand, since master controller 112 itself can detect the tachometer value of wind-driven generator, and can pass through With the propeller pitch angle of the communication check blade of pitch-controlled system, so when master controller 112 detects the tachometer value of wind-driven generator It is reduced to one to be scheduled on, and/or when propeller pitch angle of blade is more than home (is greater than 65 degree), master controller 112 can be with Control normally opened contact 303 disconnects, and disconnects the supply voltage of charger 209, so that pitch motor 107 is out of service and embraces Lock.

Example IV：

The specific embodiment of the invention four is arranged in cabin 32 with low voltage generator 301, the input of the low voltage generator 301 End with high speed shaft and/or low speed axis connection, and the low voltage generator 301 be alternating current generator exemplified by be introduced.

The output terminal of specific embodiment of the invention mesolow generator 301 pass sequentially through normally opened contact 303, slip ring 113 with The three-phase line of pitch motor 107 is electrically connected, and for providing electric energy for pitch motor 107, specific connection mode may refer to Fig. 5 It is shown.

It is preferred that the specific embodiment of the invention four provide wind power generating set further include the control system that declutches, for Under the control of master controller 112 so that pitch motor 107 declutches.

The operation principle of the specific embodiment of the invention four is：

(1) under normal circumstances：

Due to the input terminal and high speed shaft and/or low speed axis connection of low voltage generator 301, so when the leaf of wind-driven generator When piece is in rotation status, the high speed shaft and/or slow-speed shaft of wind-driven generator can drive 301 rotary electrification of low voltage generator, when After normally opened contact 303 closes, the voltage that low voltage generator 301 exports is linked into pitch motor 107, is carried for pitch motor 107 For working power；Meanwhile master controller 112 controls the control system that declutches by slip ring 113 so that pitch motor 107 declutches, Master controller 112 control declutch control system concrete mode it is identical with above-described embodiment two, which is not described herein again.

Embodiment five：

Low voltage generator 301 in the specific embodiment of the invention is arranged in wheel hub 106, and low voltage generator 301 passes through wheel The rotation of hub 106 generates electricity, so as to provide electric energy for pitch-controlled system 33；Low voltage generator in the specific embodiment of the invention five 301 can be dc generator, or alternating current generator.

It is preferred that the output terminal of the low voltage generator 301 in the specific embodiment of the invention five is by normally opened contact 303 and slides Ring 113 is electrically connected；Master controller 112 is electrically connected with normally opened contact 303, for controlling normally opened contact 303.

The voltage that low voltage generator 301 in the specific embodiment of the invention five exports can be frequency converter 203, and direct current Power supply 204 provides working power, and concrete mode can refer to above-described embodiment one；Certainly, it is low in the specific embodiment of the invention five The voltage that pressure motor 301 exports can also be that pitch motor 107 provides working power, and concrete mode can refer to above-described embodiment Two and example IV；Certainly, the voltage that the low voltage generator 301 in the specific embodiment of the invention five exports can also be charger 209 provide working power, and concrete mode can refer to above-described embodiment three.

Specifically, the low voltage generator 301 in the specific embodiment of the invention five can be arranged on 106 circle centre position of wheel hub, and Since the circle centre position of wheel hub 106 is typically provided with conducting slip ring, so setting low voltage generator 301 not in 106 circle centre position of wheel hub Too convenient, this setup only alternative scheme the most of the invention, in actual production process, the specific embodiment of the invention can Low voltage generator 301 to be arranged on to remaining position in wheel hub 106.

Based on same inventive concept, the specific embodiment of the invention additionally provides a kind of using the suitable of above-mentioned wind power generating set Paddle method, as shown in figure 9, this method includes：

S901, control low voltage generator 301 are electrically connected with pitch-controlled system 33 so that low voltage generator 301 is pitch-controlled system 33 provide electric energy；

The operation for the pitch motor 107 that S902, control pitch-controlled system 33 include, is put away the oars so that the leaf with driving blade 114 The propeller pitch angle of piece 114 is more than preset angle angle value (such as larger than 65 degree).

It is preferred that in specific embodiment of the invention above-mentioned steps S901, control low voltage generator 301 and the electricity of pitch-controlled system 33 Connection, including：Master controller 112 controls normally opened contact 303 to close so that the output terminal of low voltage generator 301 passes through normally opened Contact 303 is electrically connected with slip ring 113, for details, reference can be made to shown in Fig. 4, Fig. 5 and Fig. 8.

Specifically, in specific embodiment of the invention above-mentioned steps S901, control low voltage generator 301 and the electricity of pitch-controlled system 33 Connection, specifically includes：When low voltage generator 301 is dc generator, master controller 112 controls normally opened contact 303 to close, So that the output terminal of low voltage generator 301 passes sequentially through normally opened contact 303, slip ring 113 is electrically connected with frequency converter 203, specifically may be used It is shown in Figure 4；Or, master controller 112 controls normally opened contact 303 to close so that the output terminal of low voltage generator 301 is successively It is electrically connected, is for details, reference can be made to shown in Fig. 5 with pitch motor 107 by normally opened contact 303, slip ring 113.

Specifically, in specific embodiment of the invention above-mentioned steps S901, control low voltage generator 301 and the electricity of pitch-controlled system 33 Connection, specifically includes：When low voltage generator 301 is alternating current generator, master controller 112 controls normally opened contact 303 to close, So that the output terminal of low voltage generator 301 passes sequentially through normally opened contact 303, slip ring 113 is electrically connected with pitch motor 107, specifically Reference can be made to shown in Fig. 5；Or, master controller 112 control normally opened contact 303 close so that the output terminal of low voltage generator 301 according to It is secondary to be electrically connected by normally opened contact 303, slip ring 113 with the three-phase line of power grid input side 207, it for details, reference can be made to shown in Fig. 8.

It is preferred that in specific embodiment of the invention above-mentioned steps S902, pitch motor 107 that control pitch-controlled system 33 includes Operation, including：

When the output terminal of low voltage generator 301 passes sequentially through normally opened contact 303, slip ring 113 is electrically connected with frequency converter 203； Or, the output terminal of low voltage generator 301 passes sequentially through normally opened contact 303, the three-phase line of slip ring 113 and power grid input side 207 During electrical connection, the pitch control device 109 that pitch-controlled system 33 includes controls the operation of pitch motor 107, and specific control process can join See above-described embodiment one and embodiment three；And

When the output terminal of low voltage generator 301 pass sequentially through it is normally opened touch 303), slip ring 113 is electrically connected with pitch motor 107 When, master controller 112 controls pitch motor 107 to declutch by slip ring 113, and specific control process can be found in above-described embodiment two And example IV.

Based on same inventive concept, the specific embodiment of the invention additionally provides a kind of computer-readable storage medium, the computer Storage medium is stored with the corresponding program of feathering method of above-mentioned wind power generating set.

Those skilled in the art of the present technique are appreciated that the present invention includes being related to for performing in operation described herein One or more equipment.These equipment can specially be designed and manufactured for required purpose, or can also be included general Known device in computer.These equipment have the computer program being stored in it, these computer programs are optionally Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) computer-readable recording medium or be stored in E-command and it is coupled to respectively in any kind of medium of bus suitable for storage, the computer-readable medium is included but not Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only Read memory), RAM (Random Access Memory, immediately memory), EPROM (Erasable Programmable Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card Piece.It is, computer-readable recording medium includes by equipment (for example, computer) so as to any Jie for the form storage or transmission information read Matter.

In conclusion a kind of wind power generating set that the specific embodiment of the invention provides, which has such as Lower beneficial effect：

Firstth, in electric network power-fail, charger is abnormal, pitch-controlled system backup power supply is abnormal, power network fluctuation causes device to damage Bad or burn and wait in emergency circumstances, using wind-driven generator, the produced rotary force driving present invention is specifically in blade rotary course The low voltage generator power generation that embodiment is set, the electric energy of generation provides working power for the work of pitch-controlled system, so as to drive leaf Piece feathering is to home.Specifically, the voltage of low voltage generator output is by normally opened contact, slip ring, the phase with pitch-controlled system Position is closed to be electrically connected.

Secondth, after emergency occurs in pitch-controlled system, the low voltage generator set by the specific embodiment of the invention is Pitch motor provides working power, and master controller control pitch motor declutches, and driving blade feathering is to home.

3rd, since the low voltage generator that the specific embodiment of the invention is set is sent out using the rotary force of blade itself Electricity, so need not increase extra energy storage or mechanical device, system structure is simple, and cost is low, and easy to transformation and realizes.

4th, when blade rotational speed drops to certain rotating speed, the low voltage generator that the specific embodiment of the invention is set exports Electric energy it is smaller so that be automatically stopped give pitch-controlled system provide electric energy；Meanwhile after blade feathering is to home, can also Control normally opened contact to disconnect by master controller, powered off for pitch-controlled system.Specifically, what the specific embodiment of the invention was set is low The DC voltage of pressure motor output, can be directly inputted in pitch motor, can also input to the change that pitch-controlled system includes In frequency device and DC power supply；The alternating voltage for the low voltage generator output that the specific embodiment of the invention is set, can directly input Into pitch motor, can also input in the charger that pitch-controlled system includes.

The above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims

1. a kind of wind power generating set, including：Wind wheel (31) and cabin (32), the wind wheel (31) include wheel hub (106) and leaf Piece (114), is provided with pitch-controlled system (33) in the wheel hub (106), and the pitch-controlled system (33) includes pitch motor (107), It is characterized in that, further include：In the wheel hub (106), and/or the low voltage generator in the cabin (32) (301)；

The low voltage generator (301), for when needing feathering, the mechanical energy rotated using the wind wheel (31) to be generated electricity, and is The pitch-controlled system (33) provides electric energy；

The pitch-controlled system (33), is electrically connected, for receiving the electric energy so that the change with the low voltage generator (301) Paddle motor (107) is run, to drive the blade (114) to put away the oars so that the propeller pitch angle of the blade (114) is more than predetermined angle Value.

2. wind power generating set according to claim 1, it is characterised in that the cabin (32) includes high speed shaft and low speed Axis, the low voltage generator (301) are located in the cabin (32), and input terminal and the high speed shaft and/or the slow-speed shaft Connection.

3. wind power generating set according to claim 2, it is characterised in that including master controller (112), and be located at The wheel hub (106) and the slip ring (113) at the link position of the cabin (32)；

The output terminal of the low voltage generator (301) is electrically connected by normally opened contact (303) with the slip ring (113)；

The master controller (112) is electrically connected with the normally opened contact (303), for controlling the normally opened contact (303).

4. wind power generating set according to claim 3, it is characterised in that the pitch-controlled system (33) includes：Variable pitch control Device (109) processed, be the DC power supply (204) of the pitch control device (109) power supply, be what the pitch motor (107) was powered Frequency converter (203)；

When the low voltage generator (301) is dc generator, the output terminal of the low voltage generator (301) passes sequentially through institute State normally opened contact (303), the slip ring (113) is electrically connected with the frequency converter (203), for for the frequency converter (203) and The DC power supply (204) provides electric energy；

Alternatively, the output terminal of the low voltage generator (301) pass sequentially through the normally opened contact (303), the slip ring (113) with The pitch motor (107) is electrically connected, for providing electric energy for the pitch motor (107).

5. wind power generating set according to claim 3, it is characterised in that the pitch-controlled system (33) includes charger (209)；

When the low voltage generator (301) is alternating current generator, the output terminal of the low voltage generator (301) passes sequentially through institute State normally opened contact (303), the slip ring (113) is electrically connected with the pitch motor (107), for for the pitch motor (107) electric energy is provided；Or,

The output terminal of the low voltage generator (301) passes sequentially through the normally opened contact (303), the slip ring (113) and power grid The three-phase line of input side (207) is electrically connected, for providing electric energy for the charger (209).

6. wind power generating set according to claim 4 or 5, it is characterised in that further include the control system that declutches, for Under the control of the master controller (112) so that the pitch motor (107) is declutched.

7. wind power generating set according to claim 6, it is characterised in that the control system that declutches includes：Declutch electricity Magnet valve (408), relay (502) and the branch that declutches (61)；

One end of the solenoid valve that declutches (408) is electrically connected with the output terminal of the relay (502), and the other end passes through the pine Lock branch (61) is electrically connected with constant voltage source；

The branch that declutches (61) is provided with normally-closed contact (503) and the first normally opened contact (405)；

The normally-closed contact (503), first normally opened contact (405) are electrically connected with the master controller (112)；

The master controller (112) is used for the signal for controlling the relay (502) input terminal so that the relay (502) must be electric, and control the normally-closed contact (503) to close, control the first normally opened contact (405) closure.

8. wind power generating set according to claim 6, it is characterised in that the control system that declutches includes：Declutch electricity Magnet valve (408), relay (502), redundancy relay (404), first branch (71) and second that declutches declutch branch (72)；

Described first branch (71) that declutches is provided with normally-closed contact (503) and the first normally opened contact (405)；

Described second branch (72) that declutches is connected in parallel with described first branch (71) that declutches, and is provided with the second normally opened contact (406)；

The redundancy relay (404) is arranged in parallel with the relay (502), one end of the solenoid valve that declutches (408) with The output terminal of the relay (502) and the output terminal of the redundancy relay (404) are electrically connected, and the other end is by being connected in parallel Described first declutch branch (71) and described second branch (72) that declutches is electrically connected with constant voltage source；

The normally-closed contact (503), first normally opened contact (405) and second normally opened contact (406) with the master Controller (112) is controlled to be electrically connected；

The master controller (112) is used for the letter for controlling the relay (502) and the redundancy relay (404) input terminal Number so that the relay (502) and the redundancy relay (404) must be electric, and control second normally opened contact (406) to close Close, control first normally opened contact (405) to disconnect, control the normally-closed contact (503) to disconnect.

A kind of 9. feathering method using claim 1-8 any one of them wind power generating sets, it is characterised in that including：

The low voltage generator (301) is controlled to be electrically connected with the pitch-controlled system (33) so that the low voltage generator (301) is The pitch-controlled system (33) provides electric energy；

The operation for the pitch motor (107) that the pitch-controlled system (33) includes is controlled, to drive the blade (114) to put away the oars, is made The propeller pitch angle for obtaining the blade (114) is more than preset angle angle value.

10. feathering method according to claim 9, it is characterised in that described to control the low voltage generator (301) and institute Pitch-controlled system (33) electrical connection is stated, including：

Master controller (112) control normally opened contact (303) closure so that the output terminal of the low voltage generator (301) passes through The normally opened contact (303) is electrically connected with slip ring (113).

11. feathering method according to claim 10, it is characterised in that the control low voltage generator (301) with The pitch-controlled system (33) is electrically connected, and specifically includes：

When the low voltage generator (301) is dc generator,

Master controller (112) controls normally opened contact (303) closure so that the output terminal of the low voltage generator (301) Pass sequentially through the normally opened contact (303), the slip ring (113) is electrically connected with frequency converter (203)；

Or, master controller (112) controls normally opened contact (303) closure so that the output of the low voltage generator (301) End passes sequentially through the normally opened contact (303), the slip ring (113) is electrically connected with the pitch motor (107)；

When the low voltage generator (301) is alternating current generator,

Master controller (112) controls normally opened contact (303) closure so that the output terminal of the low voltage generator (301) Pass sequentially through the normally opened contact (303), the slip ring (113) is electrically connected with the pitch motor (107)；

Or, master controller (112) controls normally opened contact (303) closure so that the output of the low voltage generator (301) End passes sequentially through the normally opened contact (303), the slip ring (113) is electrically connected with the three-phase line of power grid input side (207).

12. feathering method according to claim 11, it is characterised in that the control pitch-controlled system (33) includes Pitch motor (107) operation, including：

When the output terminal of the low voltage generator (301) passes sequentially through the normally opened contact (303), the slip ring (113) and institute State frequency converter (203) electrical connection；Or, the output terminal of the low voltage generator (301) pass sequentially through the normally opened contact (303), When the slip ring (113) is electrically connected with the three-phase line of power grid input side (207), variable pitch control that the pitch-controlled system (33) includes Device (109) processed controls the operation of the pitch motor (107)；And

When the output terminal of the low voltage generator (301) passes sequentially through the normally opened contact (303), the slip ring (113) and institute When stating pitch motor (107) electrical connection, the master controller (112) passes through the slip ring (113) and controls the pitch motor (107) declutch.

13. a kind of computer-readable storage medium, it is characterised in that storage is corresponding just like any one of claim 9-12 feathering methods Program.