CN102606400B - Power-loss feathering control system for permanent magnet pitch variation wind driven generator set - Google Patents
Power-loss feathering control system for permanent magnet pitch variation wind driven generator set Download PDFInfo
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- 230000006837 decompression Effects 0.000 description 6
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a power-loss feathering control system for a permanent magnet pitch variation wind driven generator set. The wind driven generator set comprises a fan and a synchronous pitch variation device, wherein the synchronous pitch variation device comprises a synchronous pitch variation mechanism, a pitch variation motor and a brake. The control system for the wind driven generator set comprises a rectification unit, a mains supply voltage detection unit, a pitch variation protection unit, a pitch variation driving unit and a power-loss feathering control unit, wherein the pitch variation driving unit comprises a frequency converter for driving the pitch variation motor and a micro relay connected with the pitch variation protection unit; switch on and switch off of the micro relay operably responds to a power failure signal and are switched between connection and disconnection with the control signal end of the frequency converter; the power-loss feathering control unit is used for responding to a power failure signal of the control system and supplying voltage-drop direct current to the pitch variation motor and the brake, so that the brake is kept in a release state; and furthermore, the micro relay of the pitch variation driving unit responds to the power failure signal of the control system to start the frequency converter and drive the pitch variation motor in the release state of the brake, so that a blade rotates towards a direction with a windward angle of 90 degrees.
Description
Technical field
The present invention relates to wind driven generator technology, the permanent magnetism paddle changing wind power generator group particularly relating to a kind of centering power implements the dead electricity feathering control system of power-off protection.
Background technique
In the last few years, along with the significance of environmental protection problem is constantly given prominence to, countries in the world in succession start to develop new energy and peter out to substitute and have the traditional energy of contaminativity.Wind energy is as a kind of clean reproducible energy, and become the important channel obtaining green energy resource with its huge potentiality to be exploited, thus wind driven generator technology is presenting the situation of advancing by leaps and bounds in recent years.
Horizontal axis wind-driven generator is in the market mostly many blades wind wheel system, and the synchronous paddle changing wind power generator of many blades with change oar technology in real time progressively becomes market first-selection.Be called that " many blades list drives synchronous vane change device " application number is in the invention technological scheme of PCT/CN2011/079295 international patent application in the name of the submit of claimant, disclose a kind of synchronous vane change device of many blades impeller system.The denomination of invention submitted to subsequently claimant is again disclose a kind of wind-driven generator to having above-mentioned synchronous vane change device in the invention technological scheme of No. 201210008977.9 Chinese invention patent application of " a kind of control system of permanent magnetism paddle changing wind power generator group " to implement the synchronous control system becoming oar and control, and its control system comprises automatic variable pitch control unit and intelligent control unit.
Particularly, above-mentioned automatic variable pitch control unit comprises one first midget relay, for making pitch motor clockwise direction run, thus drive paddle to press first direction by the lead screw transmission mechanism of synchronous vane change device and synchronization link mechanism to rotate around blade turning axle; One second midget relay, for making pitch motor counterclockwise run, thus drives paddle to press the reverse of first direction to rotate around blade turning axle.Above-mentioned intelligent control unit is set to the VD that goes out according to VDC detection unit and direct current detection unit inspection and the current rotating speed of Current calculation blowing machine, thus determine that blade needs the angle and direction of adjustment according to the rule preset, above-mentioned automatic variable pitch control unit is made to perform change oar according to the determined angle and direction of adjustment that needs of intelligent control unit, and make wind power generating set synchronously become oar according to the requirement of wind speed and actual motion by technique scheme, the output power of wind-driven generator can be adjusted in real time, thus realize the maximal power tracing of wind driven generator output power.
But, after the improper disconnection of control power supply, conventional wind power generating set remains in operation and the control of uncontrolled system toward contact, is thus easy to cause load to damage, also affect the working life of wind power generating set itself simultaneously, and the major accidents such as wind wheel driving may be caused.Identical with the ubiquitous problem of wind-driven generator existing on market, also not yet propose when the power supply of wind power generator control system interrupts suddenly in foregoing invention application, wind power generating set is carried out to the technological scheme of dead electricity feathering protection.In view of this, really urgently propose a kind of effective technological scheme and solve the problems referred to above.
Summary of the invention
The object of this invention is to provide a kind of control system of permanent magnetic variable-pitch wind driven generation unit of improvement; there is dead electricity feathering controlling functions; can when the power supply of the control system of wind power generating set surprisingly disconnects; with DC control circuit, wind power generating set is implemented to the control mode of feathering shutdown; effective loss protecting is carried out to wind power generating set, thus avoids causing the damage of system and load and the generation of major accident.
For achieving the above object, a kind of permanent magnetism paddle changing wind power generator group dead electricity feathering control system provided by the present invention, its wind power generating set mainly comprises a wind-driven generator, synchronous vane change device and a control system, and wherein said synchronous vane change device comprises a synchronous blade pitch device, a pitch motor and a break; Described control system comprises:
One rectifying unit, the AC rectification for being exported by wind-driven generator is that direct current exports;
One line voltage detection unit, for detecting the Voltage threshold whether line voltage is preset lower than control system, and sends power-off signal when recording system dead electricity to control system;
One becomes oar protected location, for carrying out the operation of control synchronization vane change device according to line voltage;
One becomes oar driver element, comprise one to be electrically connected on the output terminal of described change oar protected location midget relay for the frequency variator and driving pitch motor, the switching response of described midget relay operationally switches in civil power power-off signal the position being connected with described frequency variator or disconnecting;
One dead electricity feathering control unit, comprise a direct current voltage reduction module, its input end is connected to the DC output end of rectifying unit, and its output terminal is connected to the break power output end of pitch motor, selectively also comprises a line voltage testing module; The civil power power-off signal that this DC decompression module responds detects in line voltage testing module and break to pitch motor provides the direct current of step-down to make break keep releasing state; Thus under making the midget relay of described change oar driver element keep the state discharged at break, start transducer drive pitch motor in response to civil power power-off signal and make blade to 90 °, angle direction rotation windward.
Advantageously, according to the technological scheme of the above-mentioned permanent magnetism paddle changing wind power generator group dead electricity feathering control system of the present invention, the direct current that rectifying unit exports accesses to the DC decompression module of dead electricity feathering control unit, when line voltage is detected the threshold value preset lower than control system, line voltage detection unit and module send civil power power-off signal, the step-down of described DC decompression module exports direct current in response to this civil power power-off signal, the direct current of such as 96V, break is made to remain on releasing state, the midget relay simultaneously becoming oar driver element is coupled in response to this civil power power-off signal and becomes oar frequency variator 90 ° of direction signal input ends, order becomes oar frequency variator when civil power dead electricity into pitch motor provides direct current, make its Wind wheel paddle to move closer to 90 ° windward angle direction rotate until wind-driven generator shut down, efficiently avoid the generation of fault and the danger of driving out of control, achieve the dead electricity feathering stoppage protection function of wind power generating set.
Advantageously, adopt phase asynchronous variable-frequency motor as pitch motor according to the synchronous vane change device in middle power permanent magnetic paddle changing wind power generator group dead electricity feathering control system of the present invention, realize wind-driven generator soft start by change oar driver element frequency conversion drive and make whole change oar process milder.
More advantageously, in permanent magnetism paddle changing wind power generator group dead electricity feathering control system of the present invention, a spring is also provided with in the synchronous blade pitch device of synchronous vane change device, when pitch motor dead electricity, the direction action that its elastic force makes synchronous blade pitch device continue towards impelling blade to rotate to direction, 90 °, angle windward.
Accompanying drawing explanation
Fig. 1 is according to middle power permanent magnetic paddle changing wind power generator group loss protecting device theory diagram of the present invention.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
The invention provides power permanent magnetic paddle changing wind power generator group dead electricity feathering control system in one, its basic principle is as shown in the block diagram of Fig. 1.Wherein, mainly comprise wind-driven generator 1, the synchronous vane change device 2 of many blades impeller and the control system 3 with horizontal axis rotor system () according to wind power generating set of the present invention in figure slightly.Wherein, this synchronous vane change device 2 comprises the pitch motor 22 that a synchronous blade pitch device 21, being arranged at wind wheel system engine room inside drives this synchronous blade pitch device 21, and the break 23 that is installed on the transmission shaft tail end of pitch motor 22, for eliminating the rotator inertia of pitch motor 22, implementing pitch motor 22 and braking.
Permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to the present invention mainly comprises a rectifying unit D1, a line voltage detection unit D2, one and becomes oar protected location D3, a change oar driver element D4, an a pitch motor braking driver element D5 and dead electricity feathering control unit D6.
Rectifying unit D1 is coupled to the three-phase output end of wind-driven generator 1, and the Ac that wind-driven generator 1 exports is rectified into through rectifying unit D1 the DC bus accessing wind powered generator system after direct current.
On the U phase that the collection terminal of line voltage detection unit D2 is parallel to three-phase mains S and zero phase inlet wire; whether normal for detecting line voltage; send power-off alarm when the Voltage threshold that the actual line voltage recorded is preset lower than control system 3 by this line voltage detection unit D2, and power-off signal is sent to change oar protected location D3.
Becoming oar protected location D3 is programmable controller, comprises CPU module, analogue collection module, On-off signal output module, digital communications module etc.The first digital signal input end becoming oar protected location D3 is connected to first signal output part of line voltage detection unit D2, and the second digital signal input end connects one for monitoring the change oar position detection unit J1 becoming the angle change that oar rotates.Wherein, this change oar position detection unit J1 comprises the first proximity switch, the second proximity switch and the 3rd proximity switch, the probe of described first proximity switch is coupled to pitch motor 22 rotor tooth wheel disc place, the probe of described second proximity switch is coupled to and becomes oar main shaft 0 ° of position side, and the probe of described 3rd proximity switch is coupled to and becomes oar main shaft 90 ° of position side.This change oar position detection unit J1 with become oar protected location D3 and to cooperatively interact the effect rotating over the limit position of 0 ° or 90 ° played and avoid Wind wheel paddle, thus wind-driven generator (1) to be played a protective role.
Becoming oar driver element D4 for changing the pitch of wind power generator impeller, comprising midget relay K, becoming oar frequency variator P and out put reactor.The first digital signal output end becoming oar protected location D3 connects the power supply coil of this midget relay K; the switch of this midget relay K and main contact are arranged on the input end of the control signal driving the blade of wind-driven generator to rotate to 90 ° of angle of attack directions; according to the signal about voltage detected by line voltage detection unit D2, operationally switch on the position being connected with the change oar frequency variator P becoming oar driver element D4 or disconnecting.The power input becoming oar driver element D4 connects the DC power output end of rectifying unit D1, and the access of the output terminal of rectifying unit D1 becomes the DC bus of oar frequency variator P, become the three-phase input end of the power output end access out put reactor of oar frequency variator P, the power input of the three-phase output end access pitch motor 22 of out put reactor.The secondary signal output terminal of line voltage detection unit D2 accesses the power supply coil of this midget relay K, the 90 ° of directions becoming oar driver element D4 become the main contact of oar control signal input termination midget relay K, and the power output end becoming oar driver element D4 connects the power input of pitch motor 22.When civil power power-off, this midget relay K is in response to the civil power power-off signal of line voltage detection unit D2, its main contact being in normally open is made to close, becoming oar driver element D4 from order and send 90 ° of directions change oar control signals, making pitch motor 22 become the electric current of oar to 90 ° of directions by becoming oar frequency variator P output.
In addition; preferably second digital signal output end of this change oar protected location D3 can connect a pitch motor braking driver element D5; this pitch motor braking driver element D5 exports the input end that control signal is connected to break 23; for the braking effect of control brake 23; its control mode can adopt various prior art well known by persons skilled in the art; this kind of prior art does not belong to the claimed technological scheme of the present invention, so omit.
Next, dead electricity feathering control unit D6 according to the present invention comprises a direct current voltage reduction module M1, and a selectable line voltage testing module M2.Wherein, the input end of DC decompression module M1 is connected to the DC output end of rectifying unit D1, and the output terminal of DC decompression module M1 connects the power input of the break 23 of pitch motor 22, discharges for controlling electromotor brake 23 and brakes.The input end of line voltage testing module M2 then connects the output terminal of civil power S.When civil power power-off, the 96V direct current after the civil power power-off signal output buck that this DC decompression unit M1 sends in response to line voltage testing module M2, to the break 23 of pitch motor 22, makes break 23 discharge.Further, described break 23 can adopt electromagnetic type power-off brake, be energising time depart from and power-off time with the frictin braek of spring braking, the power output end of the input termination dead electricity feathering control unit D6 of break 23, discharges at once when restraining coil passes into 96V direct current rear brake 23.
As follows according to the working principle of permanent magnetism paddle changing wind power generator group dead electricity feathering control system of the present invention:
When the threshold value of line voltage lower than systemic presupposition, control power supply namely to disconnect, line voltage detection unit D2 sends power-off signal, described Voltage threshold can preset according to actual conditions, the main contact that midget relay K often leaves closes in response to this power-off signal, send the frequency change control signal becoming oars to the blade angle of attack 90 ° of directions to change oar frequency variator P, the DC powered pitch motor 23 that change oar frequency variator P utilizes rectifying unit D1 to export is carried out 90 ° of directions and is become oars; Meanwhile, the direct current that pitch motor break 23 exports at dead electricity feathering control unit D6, such as, under the galvanic control of 96V, makes electromotor brake 23 discharge.Along with pitch moves closer to 90 ° of angles windward, the wind speed round of wind-driven generator 1 declines gradually, until wind-driven generator 1 pitch motor 22 no longer can be provided to work required electric energy time, pitch motor 22 quits work.Now, the wind wheel of wind-driven generator 1 may also at slow circumvolve, and the break 23 of pitch motor 22 is still at release mode.Preferably, the rebounding force of a spring be provided at its inner portion that can utilize synchronous vane change device according to the present invention continues to force blade to become oar to 90 ° of directions, when blade is along during to 90 ° of positions, the 3rd proximity switch as limit switch arranged 90 ° of feather position will make break 23 terminate releasing state, and thus pitch motor 22 is braked completely.
After said process, the pitch of wind-driven generator also may cannot reach 90 ° of directions not wind-engaging angle, if run into strong wind or severse weather blower fan may also can start again.In this case, if rotation speed of fan reaches requirement, dead electricity feathering control unit D6 still can drive pitch motor 22 to become oar, until the rotating speed of wind wheel drops to appropriate value to 90 ° of directions.
In the working procedure of above-mentioned middle power permanent magnetic paddle changing wind power generator group; when civil power is normal; civil power is access in the power input becoming the change oar frequency variator P of oar driver element D4, the break 23 of pitch motor 22; the digital signal becoming oar protected location D3 is passed to the control signal input end of break 23 by pitch motor braking driver element D5; and the power output end of pitch motor braking driver element D5 is connected to the power input of break 23, now pitch motor 22 is by city's electric drive.When civil power dead electricity; pitch motor braking driver element D5 and cisco unity malfunction; now the dead electricity feathering control unit D6 of wind power generating set is by wind-driven generator 1 direct current supply, controls unit autofeather until shut down, efficiently avoid the generation of fault and the danger of driving out of control.
Further advantageously, according to preferred embodiment of the present invention, pitch motor 22 in synchronous vane change device 2 wherein adopts phase asynchronous variable-frequency motor, the power input of this threephase asynchronous connects the power output end of described change oar driver element D4, possesses soft start function and makes whole change oar process milder.
Permanent magnetism paddle changing wind power generator group according to the present invention has loss protecting function; under the high reliability prerequisite that guarantee system is normally run; by its dead electricity feathering control system realize without in civil power situation to the protection of whole wind powered generator system, its main feature is:
1) can real time automatic detection line voltage according to dead electricity feathering control system of the present invention, automatically start when mains supply disconnects and become oar feathering and to shut down and without the need to manual operation, thus avoid wind-driven generator that the danger of driving out of control occurs;
2) probability that mechanical failure occurs is reduced owing to adding motor braking and spring reset duplicate protection in synchronous vane change device;
3) can continuous operation, the protection of dead electricity feathering can be implemented incessantly to wind-driven generator before city power recovery is normal;
4) introducing change oar limit position protective function prevents the mechanical structure of synchronous vane change device because damaging by power failure affects further.
Although illustrate by way of example above, described the present invention's preferably embodiment, protection scope of the present invention is not limited in above-mentioned explanation, but all technical characteristicss provided by appended claim and technical equivalents thereof define.Persons skilled in the art are understandable that, do not deviating under the essence and marrow prerequisite that the present invention instructs, any modifications and variations may still drop within the protection domain of the claims in the present invention.
Claims (7)
1. a permanent magnetism paddle changing wind power generator group dead electricity feathering control system, described wind power generating set comprises a wind-driven generator (1), synchronous vane change device (2) and a control system (3), and wherein said synchronous vane change device (2) comprises a synchronous blade pitch device (21), a pitch motor (22) and a break (23); Described control system (3) comprising:
One rectifying unit (D1), the AC rectification for being exported by wind-driven generator (1) is that direct current exports;
One line voltage detection unit (D2), for detecting the Voltage threshold whether line voltage is preset lower than control system (3), and sends civil power power-off signal when recording system dead electricity to control system (3);
One becomes oar protected location (D3), for carrying out the operation of control synchronization vane change device (2) according to line voltage;
One becomes oar driver element (D4), comprise a change oar frequency variator (P) and a midget relay (K), the power input of described change oar frequency variator (P) is connected to the DC output end of rectifying unit (D1), and the switching response of described midget relay (K) operationally switches between the position that to be connected with described change oar frequency variator (P) or to disconnect in civil power power-off signal;
It is characterized in that described control system (3) also comprises:
One dead electricity feathering control unit (D6), it comprises a direct current voltage reduction module (M1), its input end is connected to the DC output end of rectifying unit (D1), its output terminal is connected to break (23) power input of pitch motor (22), and described dead electricity feathering control unit (D6) provides the direct current of step-down to make break (23) keep releasing state in response to civil power power-off signal to the break (23) of pitch motor (22); Thus under making the midget relay (K) of described change oar driver element (D4) keep the state discharged at break (23), start change oar frequency variator (P) in response to civil power power-off signal and drive pitch motor (22) to make blade to 90 °, angle direction rotation windward.
2. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1, is characterized in that described dead electricity feathering control unit (D6) also comprises one for detecting the line voltage testing module (M2) of line voltage.
3. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1, it is characterized in that, described break (23) is electromagnetic type electricity-loss braking device, adopt energising time depart from and power-off time with the frictin braek of spring braking.
4. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1, it is characterized in that, described synchronous vane change device (2) adopts phase asynchronous variable-frequency motor as pitch motor (22), by change oar driver element (D4) frequency conversion drive, thus realize wind-driven generator (1) soft start and make whole change oar process milder.
5. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1; it is characterized in that; described control system (3) also comprises one for detecting the change oar position detection unit (J1) of the angular orientation of blade change; when blade arrives 90 ° of limit positions; making pitch motor (22) shut down by becoming oar protected location (D3), terminating its releasing state with seasonal break (23).
6. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1, is characterized in that, described control system (3) also comprises pitch motor braking driver element (D5).
7. the permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to any one of claim 1-6, it is characterized in that, also be provided with a spring in described synchronous blade pitch device (21), its elastic force can continue to force blade to rotate to direction, 90 °, angle windward at the situation of pitch motor dead electricity synchronous blade pitch device (21) of ordering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210111395.3A CN102606400B (en) | 2012-04-16 | 2012-04-16 | Power-loss feathering control system for permanent magnet pitch variation wind driven generator set |
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| CN201210111395.3A CN102606400B (en) | 2012-04-16 | 2012-04-16 | Power-loss feathering control system for permanent magnet pitch variation wind driven generator set |
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| CN102606400B true CN102606400B (en) | 2015-03-11 |
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| CN103184974B (en) * | 2013-03-29 | 2015-04-22 | 北京天诚同创电气有限公司 | Power-frequency feathering variable-pitch system for wind generating set and wind generating set |
| CN109611469B (en) * | 2019-01-23 | 2021-03-23 | 山东中车风电有限公司 | Electromagnetic braking device, system and braking method |
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| US5907192A (en) * | 1997-06-09 | 1999-05-25 | General Electric Company | Method and system for wind turbine braking |
| WO2007132303A1 (en) * | 2006-05-13 | 2007-11-22 | Clipper Windpower Technology, Inc. | Wind turbine system with ac servo motor rotor blade pitch control, using super-capacitor energy storage |
| CN201198817Y (en) * | 2008-04-25 | 2009-02-25 | 沈阳锐昌机电有限公司 | Separating and interconnecting network dual-purpose direct drive paddle-changing type wind power generator |
| CN101476541B (en) * | 2008-12-26 | 2011-02-16 | 华锐风电科技(集团)股份有限公司 | Independent variable oar control system and control method for wind generator set |
| CN201247964Y (en) * | 2009-01-08 | 2009-05-27 | 北京能高自动化技术有限公司 | Power supply for variable pitch system |
| CN101550906B (en) * | 2009-05-15 | 2011-05-04 | 北京工业大学 | DC electric machine variable pitch system and control method thereof |
| CN101624969B (en) * | 2009-08-04 | 2011-08-10 | 清华大学 | Redundancy control system and redundancy control method for wind power generation propeller change |
| CN202545111U (en) * | 2012-04-16 | 2012-11-21 | 上海致远绿色能源有限公司 | Blackout feathering control system of permanent magnet variable pitch wind-driven generator set |
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Address after: 201611 Shanghai Songjiang District Chedun town stay Industry Road No. 202 Applicant after: SHANGHAI GHREPOWER GREEN ENERGY Co.,Ltd. Address before: 201611 Shanghai City, Songjiang District Rong Hua Road 1281 Applicant before: SHANGHAI GHREPOWER GREEN ENERGY Co.,Ltd. |
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