CN102536651B - Control system of permanent magnetic variable-pitch wind driven generation unit - Google Patents
Control system of permanent magnetic variable-pitch wind driven generation unit Download PDFInfo
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- CN102536651B CN102536651B CN201210008977.9A CN201210008977A CN102536651B CN 102536651 B CN102536651 B CN 102536651B CN 201210008977 A CN201210008977 A CN 201210008977A CN 102536651 B CN102536651 B CN 102536651B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Disclosed is a control system of a permanent magnetic variable-pitch wind driven generation unit. The wind driven generation unit comprises a fan, a hub, blades, a blade rotation support and a synchronous pitch controller, wherein the blades are mounted on the periphery of the hub at the same interval, and the synchronous pitch controller comprises a pitch control motor, a lead screw transmission mechanism and a synchronous linkage. The control system comprises a rectifying unit, a direct-current voltage and current detection unit, an automatic pitch control unit and an intelligent control unit, the automatic pitch control unit comprises a first miniature relay and a second miniature relay, wherein the first miniature relay is capable of driving the pitch control motor to run clockwise to further drive the blades to rotate in the first direction by a synchronous disc and a connecting rod, the second miniature relay is capable of driving the pitch control motor to run anticlockwise to further drive the blades to rotate in the direction reverse to the first direction, the intelligent control unit is set to determine regulation angle and direction of the blades according to current acquired rotation speed of the fan so as to drive the pitch control unit to execute synchronous pitch control. The permanent magnetic variable-pitch wind driven generation unit has the advantages of simplified structure, accurate control and high running reliability.
Description
Technical field
The present invention relates to wind-driven generator automatic control technology field, especially relate to a kind of control system with the permanent magnetism paddle changing wind power generator group of synchronous vane change device.
Background technique
Social economy's fast development; the demand of people to the energy grows with each passing day; along with the traditional energies such as coal, oil, rock gas are petered out; the energy crisis brought thus and environmental pollution also increase the weight of day by day, and wind energy and water can wait the attention being more and more subject to all over the world as reproducible clean energy resource.At present, the development of wind generating technology through nearly two more than ten years reaches its maturity, progressively presents the marketization and scale, and modern wind generation technology is no longer that people are strange, and the energy that wind energy contains and DEVELOPMENT PROSPECT generally obtain accreditation in the international market.
As everyone knows, wind power generating set, primarily of blower fan and generator two-part composition, according to their different structure and the technological scheme that adopts, can have multiple mode classification.As the type according to generator is classified, can be divided into asynchronous generating type and the large class of synchronous generator type two, wherein synchronous generator type can be divided into again electric excitation synchronous generator and magneto alternator two class.Electricity excitation synchronous generator is encouraged by external direct current (d.c.) and produces magnetic field, and the rotor of magneto alternator is generally the permanent magnet pole adopting ferrite material to manufacture, need not be extraneous excitatory, have multiple advantage because simplifying the structure of generator, therefore many blades permanent magnetism paddle changing wind power generator group is praised highly widely because the realization in its various aspects of performance is better than fixed pitch type.At present, how in the limited cabin space of middle-size and small-size blower fan, designs simplification is introduced and reliable synchronous change oar and automatic control system become one of technical barrier in the urgent need to address.
At the International Patent Application PCT/CN2011/079295 of the submit of present inventor, in the invention technological scheme that name is called " many blades list drives synchronous vane change device ", disclose a kind of synchronous vane change device of many blades impeller system.According to the specific embodiment of this invention, one synchronous vane change device is arranged on the inside of engine rooms of wind power generators and wheel hub, the impeller wheel portion of wind power generating set is as shown in Figure 1 provided with multiple blade (not shown) around its wheel hub, each blade is equidistantly fixedly mounted on around wheel hub in compartment of terrain by corresponding revolving support seat 22, each revolving support seat 22 comprises single-revolution spring bearing 221, and each slewing bearing 221 comprises the inner ring and outer ring that can relatively rotate.The synchronous vane change device of this wind-driven generator mainly comprises independent pitch motor 110, lead screw transmission mechanism 120 and a synchronization link mechanism 130.Wherein, lead screw transmission mechanism 120 comprises coupling 121, ball screw 122, drive sleeve 124, transmission shaft 125 and a conversion sleeve 126; Synchronization link mechanism 130 comprises synchronous disk 131, guide support seat 132 and multiple connecting rod 133 be connected between synchronous disk 131 and blade floating bearing 221 inner ring.The ball screw 122 of lead screw transmission mechanism 120 and drive sleeve 124 straight line motion rotating power that pitch motor 110 exports being converted into transmission shaft 125 engaged through the thread, the straight line motion of transmission shaft 125 can be passed to the synchronous disk 131 of the synchronization link mechanism 130 rotated together with wheel hub be located in wheel hub through conversion sleeve 126, transmission shaft 125 is made to drive synchronous disk 131 in axial direction to do linear reciprocating motion under the guiding of guide support seat 132, thus drive the inner ring of corresponding blade slewing bearing 221 synchronously to rotate identical angle relative to its outer ring by each connecting rod 133, the wind-driven generator with multiple blade is driven to realize synchronously becoming oar with an independent motor.
Essentially describe mechanical structure and the basic principle of this synchronous blade pitch device above, object of the present invention is intended to propose brand-new technical solution to the control system of the permanent magnetism paddle changing wind power generator group of this synchronous blade pitch device of application.
Summary of the invention
The main object of the present invention is to provide a kind of control system of permanent magnetic variable-pitch wind driven generation unit, permanent magnetism paddle changing wind power generator group for controlling to have synchronous blade pitch device synchronously becomes oar according to the requirement of wind speed and actual motion, makes the blade angle of wind-driven generator can adjust in real time in target zone according to the size of wind speed.
For achieving the above object, the invention provides a kind of control system of permanent magnetic variable-pitch wind driven generation unit, this wind power generating set comprises blower fan, wheel hub, equally spaced be installed on the blade revolving support seat of multiple paddle around wheel hub and correspondence thereof, a kind of synchronous vane change device being installed on fan engine room and wheel hub inside of described permanent magnetism paddle changing wind power generator group application, described synchronous vane change device comprises a pitch motor, one lead screw transmission mechanism and a synchronization link mechanism, wherein said revolving support seat comprises single-revolution spring bearing, described lead screw transmission mechanism comprises a coupling, one ball screw, one drive sleeve, one transmission shaft and a conversion sleeve, described synchronization link mechanism comprises a synchronous disk, one guide support seat and multiple connecting rod be connected between synchronous disk and blade slewing bearing inner ring, to be combined with the nut of drive sleeve by the wire rod thread of lead screw transmission mechanism and the rotation of pitch motor is converted to transmission shaft straight line motion in the axial direction, synchronous disk and connecting rod is passed to through conversion sleeve, thus drive blade to rotate around blade turning axle, wherein said control system comprises:
One rectifying unit, the Ac for being produced by wind-driven generator is converted to direct current and exports;
One direct current voltage detection unit, is parallel to the output terminal of rectifying unit, for detecting the VDC that it exports;
One direct current current detecting unit, is coupled in the output terminal of rectifying unit, for detecting the direct current (d.c.) that it exports;
One blade angle detection unit, it comprises the first proximity switch of position near a gear disk being arranged at pitch motor output revolving shaft, for detecting the rotating speed of pitch motor;
One automatic variable pitch control unit, comprise one first midget relay, described first midget relay can make pitch motor clockwise direction run, thus drive paddle to press first direction by lead screw transmission mechanism and synchronization link mechanism to rotate around blade turning axle, one second midget relay, described second midget relay can make pitch motor counterclockwise run, thus drives paddle to press the reverse of first direction to rotate around blade turning axle; And
One intelligent control unit, the pitch motor tachometer being set to measure according to described blade angle detection unit calculates the variable quantity of blade rotation angle, then determine that in the specified time interval that can arrange at a section, blade needs the angle and direction of adjustment according to the rule preset, and the angle and direction making described automatic variable pitch control unit determine according to described intelligent control unit performs and becomes oar, thus the process of whole change oar is made to obtain stable and level and smooth control and to realize blower fan output power adjustable.
Further advantageously, control system of permanent magnetic variable-pitch wind driven generation unit of the present invention also comprises a blade angle detection unit, described blade angle detection unit comprises one first proximity switch, position near the gear disk being arranged at pitch motor output revolving shaft, for detecting the rotating speed of pitch motor, described intelligent control unit calculates the variable quantity of blade rotation angle according to the pitch motor tachometer that described blade angle detection unit measures, then determine that in the specified time interval that can arrange at a section, blade needs the angle and direction of adjustment according to the rule preset, and make described automatic variable pitch control unit perform change oar according to the angle and direction that described intelligent control unit is determined, thus make the process of whole change oar obtain stable and level and smooth control.
Further, described blade angle detection unit also comprises one second proximity switch, be arranged at a distance pitch motor the first limit position farthest, when axially direction moves to this first limit position to the drive sleeve of described lead screw transmission mechanism, namely this second proximity switch is triggered and makes pitch motor hard stop; And comprise one the 3rd proximity switch; be arranged at the second limit position that a distance pitch motor is nearest; when axially direction moves to this second limit position to the drive sleeve of described lead screw transmission mechanism, namely the 3rd proximity switch is triggered and makes pitch motor hard stop.By the setting of above-mentioned second proximity switch and the 3rd proximity switch; described for control lead screw transmission mechanism is not exceeded this first and second limit position when axially moving forward and backward by system, thus plays the effect of the mechanical construction and control system of the whole wind-driven generator of protection the present invention.
Preferably, the variable pitch control unit of control system of permanent magnetic variable-pitch wind driven generation unit of the present invention also comprises a frequency variator, the signal input of the first midget relay of described variable pitch control unit connects the signal output of described intelligent control arithmetic element, the main contact of described first midget relay is switched on or switched off the forward control circuit of described frequency variator in response to the instruction of intelligent control arithmetic element, makes this frequency variator export the frequency conversion electric current that pitch motor clockwise direction is operated; The signal input of the second midget relay of described variable pitch control unit connects the signal output of described intelligent control arithmetic element, the main contact of described second midget relay is switched on or switched off the reverse control circuit of frequency variator in response to the instruction of intelligent control arithmetic element, makes this frequency variator export making the frequency conversion electric current of pitch motor counterclockwise running; The frequency that described frequency variator exports can be changed to make blower fan export galvanic mode to determine by peak output curve according to wind speed by intelligent control arithmetic element.
Preferably; control system of permanent magnetic variable-pitch wind driven generation unit of the present invention also comprises a surge protection unit; be parallel to the three-phase output end of wind-driven generator; comprise multistage enter cabinet lightning-protection module; its input end connects wind power generating set three-phase output end; the other end is ground connection then, thus restrained effectively the impact of outside thunderbolt, protects the electronic parts and components of wind power generator control system inside well.
Preferably, control system of permanent magnetic variable-pitch wind driven generation unit of the present invention also comprises a manual brake unit, be parallel to wind-driven generator three-phase output end, comprise an air-break switch, its auxiliary output terminal connects the signal input of described intelligent control arithmetic element, and the three-phase output of described wind power generating set is accessed in one end of its main contact, and one end is then with cable short circuit in addition, utilize this hand brake unit use, better safety guarantee can be provided for maintenance staff.
Preferably, control system of permanent magnetic variable-pitch wind driven generation unit of the present invention comprises state display and a parameter set unit, comprise the user interface that display device and system are applied, for running state and the data of user's on-line monitoring wind power generating set, parameter and the user cipher of control system are set.
Preferably; control system of permanent magnetic variable-pitch wind driven generation unit of the present invention also comprises an automatic drain charge protected location; comprise a drain charge driving plate; be parallel to the output terminal of rectifying unit; and a load releasing function unit, comprise insulated gate bipolar transistor and drain charge resistance, one end of drain charge resistance connects the output head anode P+ of rectifying unit; the C pole of another termination insulated gate bipolar transistor of drain charge resistance, the E pole of insulated gate bipolar transistor meets the negative pole of output end N-of rectification output unit.Selectively, the insulated gate bipolar transistor G pole of described load releasing function unit can be used as the pulse signal output end of control signal input termination intelligent control arithmetic element.
Preferably, control system of permanent magnetic variable-pitch wind driven generation unit of the present invention is also provided with a upper monitoring unit, comprise a wireless communication module, be connected with the communication of described intelligent control arithmetic element, thus running state and the data that remote online monitors wind power generating set in real time can be realized.
Accompanying drawing explanation
Fig. 1 is the structural representation of the permanent-magnetic wind driven generator group of application of synchronized vane change device.
Fig. 2 is the module map of the control system of permanent magnetic variable-pitch wind driven generation unit of application of synchronized vane change device of the present invention.
Fig. 3 is that the blade angle of permanent magnetism paddle changing wind power generator group of the present invention detects the schematic diagram with synchronous variable pitch control unit.
Fig. 4 is the schematic diagram of the relation between the synchronous disk displacement amount M of explaination derivation wind-driven generator of the present invention and change propeller angle β.
Fig. 5 is the flow chart of the synchronous pitch control method of permanent magnetism paddle changing wind power generator group of the present invention.
Embodiment
The formation of the following control system according to permanent magnetism paddle changing wind power generator of the present invention and control principle will be explained the detailed description of embodiment in conjunction with the drawings.
Module map shown in Fig. 2 is the schematic diagram that the control system of permanent magnetism paddle changing wind power generator of the present invention simplifies, the present invention applies the synchronous vane change device disclosed in a kind of above-mentioned background technology and synchronously becomes oar control to many blades wind-driven generator, the structure of its mechanical part is substantially identical with prior art, for the sake of brevity repeat no more, the formation of its control section as shown in Figure 2, mainly comprise one to change direct current energy into rectifying unit D1 for the threephase AC produced by wind-driven generator, the one VDC detection unit D2 being parallel to the three-phase output end of described rectifying unit D1, the one direct current detection cells D 3 being coupled to the three-phase output end of described rectifying unit D1, one surge protection cells D 4, one manual brake unit D5, one for detecting the blade angle detection unit D6 of blade angle change, the one automatic automatic variable pitch control unit D7 controlling blade and rotate, and an intelligent control unit D8.
Wherein, described rectifying unit D1 is made up of three diode rectifier bridges, the input end of each diode rectifier bridge is given a dinner for a visitor from afar one of them of power generator three-phase output end, the positive and negative output polar of described diode rectifier bridge is given a dinner for a visitor from afar the positive and negative DC output end of power generator respectively, " P+ " end namely shown in figure and " N-" end.
VDC detection unit D2 can select electricity isolated DC voltage transformer, and its output voltage is generally the analogue signal of 0-10V.The input end of this DC voltage transformer is electrically connected with the output terminal of rectifying unit D1, and its output terminal is then connected to the input end of analog signal of intelligent control unit D8.
Direct current detection cells D 3 can adopt Hall current mutual inductor, and its output current is generally the analogue signal of 0-20mA.The DC bus positive pole of rectifying unit D1 output terminal passes the circular hole of Hall current mutual inductor, and the analogue signal that Hall current mutual inductor exports then is transferred to another input end of analog signal of intelligent control unit D8.
According to a preferred embodiment of the invention, surge protection cells D 4 is parallel to the three-phase output end of wind-driven generator, it comprise multistage enter cabinet lightning-protection module, its input end connects wind power generating set three-phase output end, and the other end is ground connection then.
According to another preferred embodiment of the present invention, hand brake cells D 5 is parallel to wind-driven generator three-phase output end, it comprises an air-break switch, its auxiliary output terminal connects the signal input of described intelligent control unit D8, the three-phase output of described wind power generating set, one end cable short circuit are in addition accessed in one end of its main contact.
Next, describe the synchronous change oar control principle of permanent magnetism paddle changing wind power generator of the present invention with reference to figure 3 and Fig. 4, the blade angle detection unit D6 in control system of the present invention comprises the proximity switch of three shown in Fig. 3: the first proximity switch S
β, the second proximity switch S
90with the 3rd proximity switch S
0, their output signal is all passed to intelligent control unit D8.
Wherein the first proximity switch S
βprobe be located near the gear disk near pitch motor 110 output revolving shaft side, for detecting the rotating speed/angular velocity of pitch motor, unit time inter-sync dish 131 displacement in the axial direction can be calculated by intelligent control unit D8 according to the pitch of measured pitch motor rotating speed and screw mandrel.
Second proximity switch S
90probe be arranged at distance pitch motor 110 first limit position farthest and 90o limit position, when the drive sleeve 124 of described lead screw transmission mechanism 120 moves to this first limit position in the axial direction, this second proximity switch S
90namely be triggered and make pitch motor 110 hard stop, now, transmission shaft 125, synchronous disk 131 and connecting rod 133 all move to distance pitch motor 110 position farthest, and it is 90o that blade then goes to angle windward.
3rd proximity switch S
0probe be arranged at nearest second limit position of distance pitch motor 110 and 0o limit position, when the drive sleeve 124 of described lead screw transmission mechanism 120 moves to this second limit position in its axial direction, the 3rd proximity switch S
0namely be triggered and make pitch motor 110 hard stop, now, transmission shaft 125, synchronous disk 131 and connecting rod 133 all move to the nearest position of distance pitch motor 110, and it is 0 ° that blade then goes to angle windward.
As mentioned above, the second proximity switch S
90with the 3rd proximity switch S
0be used for controlling described lead screw transmission mechanism 120 by system and do not exceed this first and second limit position when axially movable, thus play and protect the total of wind-driven generator of the present invention and the effect of control system.
When synchronous disk 131 moves to B2 position from B1 position as shown in Figure 4 vertically, one end that connecting rod 133 is connected to blade floating bearing 221 is clockwise to the position of A2 around blade turning axle O from A1 position, thus, following relation can be set up between the angle beta that synchronous disk is turned over by the displacement amount M of position B1 to B2 and the initial angle α of the blade turning radius and blade, utilize this relation, for can by the first proximity switch S
βmeasure and obtain pitch motor rotating speed/angular velocity and draw the displacement amount of the feed screw nut of lead screw transmission mechanism relative to screw mandrel i.e. the displacement amount M of synchronous disk, just calculate should the blade angle variable quantity β of displacement amount M:
Wherein, r is length of connecting rod, and R is the blade turning radius, and α is the initial angle of blade, and h is the horizontal equivalent of motion track apart from blade turning axle that connecting rod is positioned at synchronous disk one end.
One first midget relay, one second midget relay and a frequency variator is comprised in the pitch motor control circuit of automatic variable pitch control unit D7.Described first, the power supply coil of the second midget relay is all connected to the signal output of described intelligent control unit D8, the main contact of described first midget relay is switched on or switched off the forward control circuit of frequency variator in response to the instruction of intelligent control unit D8, this frequency variator is made to export the frequency conversion electric current that pitch motor 110 is operated in a clockwise direction, thus drive the drive sleeve 124 of lead screw transmission mechanism 120 to move to the direction moving closer to pitch motor 110, and drive blade to rotate around blade turning axle by first direction by the synchronous disk 131 of synchronization link mechanism 130, namely as shown in Figure 4, synchronous disk 131 moves from B1 to B2 vertically, and one end that connecting rod 133 is connected to blade floating bearing 221 is rotated around blade turning axle O from A1 to A2, the main contact of described second midget relay is switched on or switched off the reverse control circuit of frequency variator in response to the instruction of intelligent control unit D8, make this frequency variator export and make pitch motor 110 with the frequency conversion electric current of counterclockwise running, thus drive the drive sleeve 124 of lead screw transmission mechanism 120 to moving away from the direction of pitch motor 110 gradually, and drive blade to rotate around blade turning axle by the reverse of first direction by the synchronous disk 131 of synchronization link mechanism 130, namely as shown in Figure 4, synchronous disk 131 moves from B2 to B1 vertically, and one end that connecting rod 133 is connected to blade floating bearing 221 is rotated to A2 around blade turning axle O from A1.Because the axial straight line changing drive sleeve 124 into moves back and forth by the screw mandrel 122 being rotated through lead screw transmission mechanism 120 of pitch motor 110 and the screw thread of drive sleeve 124, and pass to transmission shaft 125, namely the sense of rotation controlling pitch motor 110 controls the transmission shaft 125 i.e. movement direction of synchronous disk 131, the first end of connecting rod 133 is made to move along horizontal axis a all the time, the other end of connecting rod 133 then around blade turning axle with the circular arc of the turning radius R of slewing bearing inner ring for moving track, consequently, lead screw transmission mechanism and synchronous disk is driven by an independent motor, just reach the effect making multiple blade synchronous change angles.More preferably, the speed that the frequency of the frequency variator output of described automatic variable pitch control unit D7 can be changed according to wind speed by intelligent control unit D8 exports galvanic mode to determine by maximum work output rate curve to make blower fan, because the rotating speed of pitch motor is determined by the output frequency of this frequency variator, the speed of change oar is thus made to change along with the change of wind speed.
Intelligent control unit D8 can adopt programmable controller, mainly comprises primary processor CPU, signal I/O and communication module.Described intelligent control unit D8 is received from the analogue signal of VDC detection unit D2 and direct current detection cells D 3 collection by the input of its analogue signal, and passes to primary processor CPU through analog-to-digital conversion.First, second and third proximity switch of above-mentioned blade angle detection unit D6, and the state signal of first and second equipment such as midget relay and frequency variator of above-mentioned automatic variable pitch control unit D7 is connected to the signal input part of described intelligent control unit D8.Real-Time Monitoring is carried out in the change of the electric current produced wind-driven generator by the primary processor CPU of described intelligent control unit D8, magnitude of voltage, displacement amount and change propeller angle, and realizes the synchronous real-time control becoming oar process according to systemic presupposition setting parameter and the corresponding action command of output with conditions.
Below, the flow process with reference to figure 5 illustrates the key step that the synchronous change oar of permanent magnetism paddle changing wind power generator of the present invention controls, specific as follows:
Step 1: the beginning of wind-driven generator startup, wind speed is greater than incision wind speed and is less than rated wind speed, intelligent control unit D8 exports corresponding instruction to automatic variable pitch control unit D7 according to the actual wind speed recorded, control blade and be adjusted to the best angle being conducive to wind wheel and starting gradually, thus make blower fan realize soft start, the wind energy utilization efficiency that the shape of usual blade is designed to play when this best angle is best, and thus this best angle is also by the established angle as blade;
Step 2: in the middle of fan operation, the output voltage of wind-driven generator, electric current and power is detected by VDC detection unit D2, direct current detection cells D 3, simultaneously, the data such as the wind speed relevant to blade current angular by blade angle detection unit D6 Real-time Collection and pitch motor rotating speed, and these data are passed to intelligent control unit D8;
Step 3: the current wind speed gathered step 2 by intelligent control unit D8 and blower fan rated wind speed compare, thus determine that blade needs direction and the angle of adjustment, and corresponding instruction is passed to become propeller angle control unit D7 and perform and become oar; The adjustment mode of its Rule of judgment and correspondence is as follows:
-as current wind speed be less than blower fan rated wind speed time, make blade angle be adjusted to its established angle position;
-as current wind speed be greater than blower fan rated wind speed time, blade angle is located at make wind speed round maintain being no more than its rated speed ± margin of error of R in change, the size of R value can preset according to the required precision of control system, in this case, this margin of error is exceeded once wind speed round, control command will be exported, with the angle making the wind speed round mode revert within the scope of this target error adjust blade by intelligent control unit D8;
-as current wind speed substantially exceed the alert limit of blower fan rated wind speed or wind-driven generator break down time; control system will send warning message; and export control command by intelligent control unit D8; blade is adjusted to gradually the angle of attack and equals 90o; make wind speed round slowly reduce until make fan parking, realize dead halt protection blower fan not by the impact of strong wind in aerodynamic braking mode.
Step 4: carry out writ of execution blade according to intelligent control unit D8 in the control command that step 3 exports and go to the 90o angle of attack by 0o by becoming propeller angle control unit D7 or go to by 90o the action that 0o angle of attack direction becomes oar.
Perform in reality in the process becoming oar action, in order to ensure the reliability and the smoothness that become oar, after intelligent control unit D8 judges according to the data qualification of Real-time Collection, what reality exported is the angle and direction that in certain hour interval of delta t, blade will adjust, and the time lag, Δ t can be pre-set by user.Therefore, step 4 comprises again following sub-step:
Sub-step 41: perform the action of change oar according to the change oar instruction that intelligent control unit D8 exports, this instruction comprises angle delta β (i.e. angular velocity=Δ β/Δ t) and the direction of the required rotation of Δ t blade in a certain time interval;
Sub-step 42: draw the angle that blade changes by the pitch motor rotating speed fed back by blade angle detection unit D6, judge the condition whether blade current angular meets step 3 and determine, as current blade angle puts in place, then enter step 5, become oar action and complete; As current blade angle does not put in place, then become oar action not complete, be back to step 2, repeat step 2 and step 3, carry out data capture and condition judgment, then remain and perform further change oar action in step 41, so in the mode of going forward one by one, until judge that the change of blade angle puts in place in step 42, then side enters step 5, becomes oar action and completes; If become in oar process in execution, blade arrives 90o or 0o limit position, and pitch motor stops immediately, if lead screw transmission mechanism 120 triggers second or the 3rd proximity switch, pitch motor also stops immediately; Pitch motor is once stop action, and namely the change oar control procedure of complete set terminates.
In a particular embodiment of the present invention, above-mentioned control system of permanent magnetic variable-pitch wind driven generation unit is also provided with state display and a parameter set unit D9, comprise user interface and the display device of control system, such as exercisable touch-screen display, be connected by the communication interface of datawire with intelligent control unit D8, the user interface that user can be shown by display device observes running state and the data of wind power generating set, also again can adjust to meet new requirement to the relevant parameter of system cloud gray model.In some preferred embodiment, user can also be shown by this state and parameter set unit D9 setting user cipher.
Further, an automatic drain charge protected location D10 is also provided with at the DC output end of wind-driven generator, comprise an a drain charge driving plate D11 and drain charge power cell D12, described drain charge power cell D12 comprises insulated gate bipolar transistor (IGBT) and drain charge resistance R1, the direct current that wherein said drain charge driving plate D11 is parallel to rectifying unit D1 exports, that is, the direct-flow input end of the drain charge circuit of described drain charge driving plate D11 connects the output terminal of rectifying unit D1, P+ end and N-end; The pulse signal output end of the control signal input termination intelligent control unit D8 of this drain charge circuit, its drive singal exports the driving signal input of termination drain charge power cell D12, i.e. the G pole of insulated gate bipolar transistor; Drain charge resistance R1 one end of described drain charge power cell D12 connects the positive pole P+ of rectifying unit D1 output terminal, the C pole of another termination insulated gate bipolar transistor of drain charge resistance R1, the E pole of insulated gate bipolar transistor meets the negative pole N-of rectifying unit D1 output terminal, and the G pole of insulated gate bipolar transistor connects the drive output of drain charge driving plate D11 as the driving signal input of drain charge power cell D12.
During work, wind-driven generator threephase AC, through surge protection cells D 4 ground connection, converts Ac to direct current by the three-phase diode rectifier bridge of rectifying unit D1, is accessed in load by DC output end P+ and N-.The analog amount of DC voltage measurement cells D 2 and DC current measurement cells D 3 Real-time Collection direct current (d.c.) and VDC, by again data being sent to the CPU module of intelligent control unit D8 after analog-to-digital conversion, gathered data and the parameter of adjusting in advance are compared, if VDC exceedes predetermined threshold, trigger pwm pulse output module and send pwm pulse signal to discharge protection cells D 10, then the insulated gate bipolar transistor in drive singal driving drain charge power cell D12 is sent by drain charge driving plate D11, the energy that wind-driven generator exports is through rectifying unit D1 rectification, again by the insulated gate bipolar transistor of drain charge power cell D12, drain charge resistance carries out drain charge.When VDC is lower than predetermined threshold, namely pwm pulse output module stops sending pwm pulse signal, and intelligent control unit D8 continues to detect d. c. voltage signal, until voltage is lower than predetermined threshold.
Drain charge drives D11 plate also directly can carry out automatic drain charge by detecting VDC.When the VDC that drain charge driving plate D11 detects in DC line exceedes setting valve, drain charge driving plate D11 directly sends the insulated gate bipolar transistor in drive singal driving drain charge unit, the energy of wind-driven generator is by rectifying unit D1 rectification, drain charge is carried out again by the insulated gate bipolar transistor of drain charge power cell D12, drain charge resistance, when VDC is lower than setting valve, drain charge driving plate D11 stops drive singal.
Preferably, control system of the present invention can also be provided with a upper monitoring cells D 20, comprise a wireless communication module, the VPN routing module of such as GPRS communication module or 3G, be connected with the communication interface of described intelligent control unit D8, thus running state and the data that remote online monitors wind power generating set in real time can be realized.
According to the technological scheme that above-mentioned specific embodiment describes, the advantage of control system of permanent magnetic variable-pitch wind driven generation unit provided by the present invention is:
1) synchronous variable blade control system of the present invention is owing to have employed the simple and reliable synchronous blade pitch device of structure, full automatic synchronization can be completed easily and become oar function, achieve blower fan output power adjustable according to the change of wind speed, perfect balance between Wind Power Utilization and device security;
2) pressure when also reducing wind-driven generator system-down by synchronous change oar automatic control function of the present invention, makes the stopping process of wind-driven generator more steady;
3) by adding Multistage surge protected location at the three-phase input end of wind turbine control system, restrained effectively the impact of external lightning, protecting the electronic parts and components of wind turbine control system inside well;
4) use of manually braking function, can prevent severse weather to the destruction of blower fan, provide better safety guarantee to the technician carrying out upkeep operation on wind-driven generator;
5) because upper monitoring unit have employed wireless communication module, making operator carry out real-time remote monitoring to the operation of wind power generating set becomes possibility.
Although more than describe the present invention's preferably specific embodiment in detail; be understandable that; technological scheme described by the invention described above specific embodiment is only the object of present inventive concept and non-limiting is described; those of ordinary skill in the art can make some apparent amendment, change or equivalent replacement without the need to creative work on the basis understanding design of the present invention and instruction, and these apparent amendments, change or equivalent replacement all should in the protection domains of the claim appended by the application.
Claims (11)
1. a control system of permanent magnetic variable-pitch wind driven generation unit, described wind power generating set comprises blower fan, wheel hub, be installed on the blade revolving support seat (22) of multiple paddle around wheel hub and correspondence thereof at equal intervals, and be installed on the synchronous vane change device of fan engine room and wheel hub inside, described synchronous vane change device comprises a pitch motor (110), one lead screw transmission mechanism (120) and a synchronization link mechanism (130), wherein said revolving support seat (22) comprises single-revolution spring bearing (221), described lead screw transmission mechanism (120) comprises a coupling (121), one ball screw (122), one drive sleeve (124), one transmission shaft (125) and a conversion sleeve (126), described synchronization link mechanism (130) comprises a synchronous disk (131), a guide support seat (132) and multiple connecting rod (133) be connected between synchronous disk (131) and the inner ring of blade slewing bearing, by the wire rod thread of described lead screw transmission mechanism (120) and drive sleeve to be screwed the translating rotation of pitch motor (110) be transmission shaft (125) straight line motion in the axial direction, pass to synchronous disk (131) and connecting rod (133) through conversion sleeve (126), thus drive blade wraparound axis of rotation, it is characterized in that
Described control system comprises:
One rectifying unit (D1), the Ac for being produced by wind-driven generator is converted to direct current and exports;
One direct current voltage detection unit (D2), is parallel to the output terminal of rectifying unit (D1), for detecting the VDC that it exports;
One direct current current detecting unit (D3), is coupled in the output terminal of rectifying unit (D1), for detecting the direct current (d.c.) that it exports;
One blade angle detection unit (D6), it comprises the first proximity switch of position near a gear disk being arranged at pitch motor (110) output revolving shaft, for detecting the rotating speed of pitch motor (110);
One automatic variable pitch control unit (D7), comprise one first midget relay, described first midget relay can make pitch motor (110) clockwise direction run, thus drive paddle to press first direction rotation by synchronization link mechanism (130), one second midget relay, described second midget relay can make pitch motor (110) counterclockwise run, thus drives paddle rotating backward by first direction; And
One intelligent control unit (D8), pitch motor (110) tachometer being set to measure according to described blade angle detection unit (D6) calculates synchronous disk (131) displacement in its axial direction in synchronization link mechanism (130); Then determine that in the specified time interval that can arrange at a section, blade needs the angle and direction of adjustment according to the rule preset, and make described automatic variable pitch control unit (D7) perform according to the angle and direction that described intelligent control unit (D8) is determined becoming oar and to realize blower fan output power adjustable.
2. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, is characterized in that described blade angle detection unit (D6) also comprises one second proximity switch S
90, be arranged at the first limit position that distance pitch motor (110) is nearest, when axially direction moves to this first limit position to the drive sleeve (124) of described lead screw transmission mechanism (120), this second proximity switch S
90namely be triggered and make pitch motor (110) hard stop.
3. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, is characterized in that described blade angle detection unit (D6) also comprises one the 3rd proximity switch S
0, be arranged at distance pitch motor (110) second limit position farthest, when axially direction moves to this second limit position to the drive sleeve (124) of described lead screw transmission mechanism (120), the 3rd proximity switch S
0namely be triggered and make pitch motor (110) hard stop.
4. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1; it is characterized in that described control system also comprises a surge protection unit (D4); be parallel to the three-phase output end of wind-driven generator; comprise multiple enter cabinet lightning-protection module; its input end connects wind power generating set three-phase output end, and the other end is ground connection then.
5. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, it is characterized in that described control system is also provided with a manual brake unit (D5), be parallel to wind-driven generator three-phase output end, comprise an air-break switch, its auxiliary output terminal connects the signal input of described intelligent control arithmetic element (D8), the three-phase output of described wind power generating set is accessed in one end of its main contact, and one end is then with cable short circuit in addition.
6. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, it is characterized in that described control system also comprises state display and a parameter set unit (D9), comprise the user interface that display device and system are applied, for running state and the data of user's on-line monitoring wind power generating set, parameter and the user cipher of control system are set.
7. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, it is characterized in that described control system also comprises an automatic drain charge protected location (D10), comprise a drain charge driving plate (D11), be parallel to the output terminal of rectifying unit (D1), and a load releasing function unit (D12), comprise insulated gate bipolar transistor and drain charge resistance, one end of drain charge resistance connects the positive pole P+ of rectifying unit (D1) output terminal, the C pole of another termination insulated gate bipolar transistor of drain charge resistance, the E pole of insulated gate bipolar transistor meets the negative pole N-of rectification output unit D1 output terminal.
8. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 7, is characterized in that the pulse signal output end of the insulated gate bipolar transistor G pole of described load releasing function unit (D12) as control signal input termination intelligent control arithmetic element (D8).
9. control system of permanent magnetic variable-pitch wind driven generation unit according to claim 1, also is characterized in that described control system
Be provided with a upper monitoring unit (D20), comprise a wireless communication module be connected with the communication of described intelligent control arithmetic element (D8).
10. the control system of permanent magnetic variable-pitch wind driven generation unit according to any one of claim 1 to 9, it is characterized in that described variable pitch control unit (D7) also comprises a frequency variator, the signal input of described first midget relay connects the signal output of described intelligent control arithmetic element (D8), the main contact of described first midget relay is switched on or switched off the forward control circuit of described frequency variator in response to the instruction of described intelligent control arithmetic element (D8), makes this frequency variator export the frequency conversion electric current that pitch motor (110) clockwise direction is operated; The signal input of described second midget relay connects the signal output of described intelligent control arithmetic element (D8), the main contact of described second midget relay is switched on or switched off the reverse control circuit of frequency variator in response to the instruction of intelligent control arithmetic element (D8), makes this frequency variator export and makes pitch motor (110) with the frequency conversion electric current of counterclockwise running.
11. control system of permanent magnetic variable-pitch wind driven generation units according to claim 10, is characterized in that the frequency that the frequency variator of described variable pitch control unit (D7) exports is changed to make blower fan export galvanic mode to determine by peak output curve according to wind speed by intelligent control arithmetic element D8.
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| CN104675622A (en) * | 2014-12-02 | 2015-06-03 | 青岛金博士自动化技术有限公司 | Wind driven generator with variable-pitch device and control method of wind driven generator |
| CN105179181B (en) * | 2015-09-15 | 2018-11-06 | 苏州格远电气有限公司 | The state display device and display methods of wind electricity change paddle driver |
| CN108869970B (en) * | 2017-05-11 | 2024-05-14 | 中国科学院地理科学与资源研究所 | Balance supporting device for single-screw rod |
| CN110067703B (en) * | 2019-05-28 | 2023-12-29 | 华北电力大学 | Worm type synchronous variable pitch wind turbine generator and control method |
| CN112523946B (en) * | 2019-09-17 | 2022-10-18 | 北京金风科创风电设备有限公司 | Variable pitch control method and device for wind generating set and medium |
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