CN102606400A - 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 PDF

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Publication number
CN102606400A
CN102606400A CN2012101113953A CN201210111395A CN102606400A CN 102606400 A CN102606400 A CN 102606400A CN 2012101113953 A CN2012101113953 A CN 2012101113953A CN 201210111395 A CN201210111395 A CN 201210111395A CN 102606400 A CN102606400 A CN 102606400A
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control system
oar
power
dead electricity
pitch variation
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CN102606400B (en
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袁炜
俞卫
张中伟
何雪松
叶余胜
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Shanghai Ghrepower Green Energy Co Ltd
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Shanghai Ghrepower Green Energy Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

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

Permanent magnetism paddle changing wind power generator group dead electricity feathering control system
Technical field
The present invention relates to the wind-power electricity generation machine technology, the permanent magnetism paddle changing wind power generator group that particularly relates to a kind of centering power is implemented 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 outstanding, countries in the world began to develop new energy in succession to substitute the traditional energy of petering out and having contaminativity.Wind energy becomes an important channel obtaining green energy resource as a kind of clean reproducible energy with its huge potentiality to be exploited, thereby the wind-power electricity generation machine technology demonstrates the situation of advancing by leaps and bounds in recent years.
Horizontal axis wind-driven generator in the market is many blades wind wheel system mostly, progressively becomes the market first-selection and have the technological synchronous paddle changing wind power generator of many blades of real-time change oar.It is in the invention technological scheme of PCT/CN2011/079295 international patent application that the name of before the claimant, submitting to is called " many blades list drives synchronous vane change device " application number, discloses a kind of synchronous vane change device of many blades impeller system.In the invention technological scheme of denomination of invention for No. 201210008977.9 Chinese invention patent application of " a kind of control system of permanent magnetism paddle changing wind power generator group " that the claimant submits to subsequently, disclose a kind of control system that the synchronous change of wind-driven generator enforcement oar with above-mentioned synchronous vane change device is controlled again, 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; Be used to make become the operation of oar motor clockwise direction, thereby press first direction around the rotation of blade turning axle through the lead screw transmission mechanism and the synchronization link mechanism drive paddle of synchronous vane change device; One second midget relay is used to make change oar motor counterclockwise to move, and presses the reverse around the rotation of blade turning axle of first direction thereby drive paddle.Above-mentioned intelligent control unit is set to calculate the current rotating speed of blower fan according to detected VD of VDC detection unit and direct current detection unit and galvanometer; Thereby confirm the angle and direction of blade needs adjustment according to preset rule; Make above-mentioned automatic variable pitch control unit carry out and become oar according to the angle and direction of the determined needs adjustment of intelligent control unit; And make wind power generating set become oar synchronously according to the requirement of wind speed and actual motion through technique scheme; The output power of wind-driven generator can be adjusted in real time, thereby realize the maximal power tracing of wind-driven generator output power.
Yet; After the improper disconnection of control power supply, conventional wind power generating set remains in operation and the control of uncontrolled system toward contact, thereby is easy to cause load to damage; Simultaneously also influence the working life of wind power generating set itself, and possibly cause major accident such as wind wheel driving.Identical with the ubiquitous problem of existing wind-driven generator on the market, also do not propose as yet in the foregoing invention application when the power supply of wind power generator control system interrupts suddenly, wind power generating set to be carried out the technological scheme of dead electricity feathering protection.In view of this, demand proposing a kind of otherwise effective technique scheme really urgently and solve the problems referred to above.
Summary of the invention
The purpose of this invention is to provide a kind of improved permanent magnetism paddle changing wind power generator set control system; Has dead electricity feathering control function; Can be in that the power supply of the control system of wind power generating set be unexpected when breaking off; With DC control circuit wind power generating set is implemented the control mode that feathering is shut down, wind power generating set is carried out effective loss protecting, thereby avoid causing the damage of system and load and the generation of major accident.
For realizing the foregoing invention purpose; 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, a synchronous vane change device and a control system, and wherein said synchronous vane change device comprises that a synchronous blade pitch device, becomes an oar motor and a break; Said control system comprises:
One rectifying unit, the AC rectification that is used for wind-driven generator output is direct current output;
One line voltage detection unit is used to detect line voltage and whether is lower than the preset Voltage threshold of control system, and when recording system's dead electricity, sends power-off signal to control system;
One becomes the oar protected location, is used for controlling according to line voltage the operation of synchronous vane change device;
One becomes the oar driver element; Comprise that one is used to drive the midget relay that the frequency variator and that becomes the oar motor is electrically connected on the output terminal of said change oar protected location, the switching response of said midget relay operationally switches on the position that is connected or breaks off with said frequency variator in the civil power power-off signal;
One dead electricity feathering control unit comprises a direct current step-down module, and its input end is connected in the dc output end of rectifying unit, and its output terminal is connected to the break power output end that becomes the oar motor, selectively also comprises a line voltage testing module; This DC decompression module responds provides the direct current of step-down to make break keep releasing state in the detected civil power power-off signal of line voltage testing module to the break that becomes the oar motor; Thereby under the state that the midget relay that makes said change oar driver element keeps discharging at break, start frequency variator driving change oar motor in response to the civil power power-off signal and make blade rotate to the 90 ° of directions in angle of facining the wind.
Advantageously; The technological scheme of above-mentioned permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to the present invention; The direct current of rectifying unit output accesses to the DC decompression module of dead electricity feathering control unit, and when line voltage is detected when being lower than the control system preset threshold value, line voltage detection unit and module are sent the civil power power-off signal; The step-down of said DC decompression module is output DC in response to this civil power power-off signal; For example the direct current of 96V makes break remain on releasing state, and the midget relay that becomes the oar driver element simultaneously is coupled in response to this civil power power-off signal and becomes 90 ° of direction signal input ends of oar frequency variator; Order becomes the oar frequency variator provides direct current into becoming the oar motor under the situation of civil power dead electricity; Its wind wheel blade is rotated until wind-driven generator to the direction that moves closer to 90 ° of angles that facing the wind shut down, avoided the generation of fault and the danger of driving out of control effectively, realized the dead electricity feathering stoppage protection function of wind power generating set.
Advantageously; Adopt phase asynchronous variable-frequency motor as becoming the oar motor according to the synchronous vane change device in the power permanent magnetic paddle changing wind power generator group dead electricity feathering control system in of the present invention, realize that by becoming oar driver element frequency conversion drive the wind-driven generator soft start makes 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; Also be provided with a spring in the synchronous blade pitch device of vane change device synchronously; Under the situation that becomes oar motor dead electricity, its elastic force makes synchronous blade pitch device continue towards the direction action that impels blade to the 90 ° of direction rotations in angle of facining the wind.
Description of drawings
Fig. 1 is according to power permanent magnetic paddle changing wind power generator group loss protecting device theory diagram in of the present invention.
Embodiment
Describe embodiment of the present invention in detail below in conjunction with accompanying drawing.
The invention provides a kind of middle power permanent magnetic paddle changing wind power generator group dead electricity feathering control system, its basic principle is shown in the block diagram of Fig. 1.Wherein, mainly comprise the have the horizontal axis rotor system synchronous vane change device 2 of wind-driven generator 1, many blades impeller and the control system 3 of (figure part omitted) according to wind power generating set of the present invention.Wherein, This synchronous vane change device 2 comprises that one is arranged at the synchronous blade pitch device 21 of wind wheel system engine room inside, the change oar motor 22 of this synchronous blade pitch device 21 of driving; And one be installed on the transmission shaft tail end that becomes oar motor 22 break 23; Be used to eliminate the rotator inertia that becomes oar motor 22, implement to become 22 brakings of oar motor.
Permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to the present invention comprises that mainly a rectifying unit D1, a line voltage detection unit D2, become oar protected location D3, and become oar driver element D4, a change oar motor braking driver element D5 and a 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 of wind-driven generator 1 output inserts the dc bus of wind powered generator system after rectifying unit D1 is rectified into direct current.
The U that the collection terminal of line voltage detection unit D2 is parallel to three-phase mains S mutually with zero inlet wire mutually on; Whether be used to detect line voltage normal; When the actual line voltage that records is lower than the preset Voltage threshold of control system 3, send the outage alarm, and power-off signal sent to become oar protected location D3 by this line voltage detection unit D2.
Become oar protected location D3 and be programmable controller, comprise CPU module, analogue collection module, switching value input/output module, digital communications module etc.First digital signal input end that becomes oar protected location D3 is connected in first signal output part of line voltage detection unit D2, and second digital signal input end connection one is used to monitor the change oar position detection unit J1 of the angle variation that becomes the oar rotation.Wherein, This change oar position detection unit J1 comprise first near switch, second near switch and the 3rd near switch; Said first probe near switch is coupled to and becomes oar motor 22 rotor tooth wheel disc places; Said second probe near switch is coupled to and becomes 0 ° of position side of oar main shaft, and the said the 3rd probe near switch is coupled to and becomes 90 ° of position side of oar main shaft.This change oar position detection unit J1 cooperatively interacts and plays the effect that the rotation of avoiding the wind wheel blade surpasses the limit position of 0 ° or 90 ° with becoming oar protected location D3, thereby wind-driven generator (1) is played a protective role.
Become the pitch that oar driver element D4 is used to change the wind-driven generator impeller, comprise midget relay K, become oar frequency variator P and out put reactor.First digital signal output end that becomes oar protected location D3 connects the power supply coil of this midget relay K; The switch of this midget relay K is that main contact is set at the input end of the blade of driving wind-driven generator to the control signal of 90 ° of angle of attack directions rotations; According to the detected signal of line voltage detection unit D2, operationally switch on the position that is connected or breaks off with the change oar frequency variator P that becomes oar driver element D4 about voltage.The power input that becomes oar driver element D4 connects the dc power output end of rectifying unit D1; And the output terminal of rectifying unit D1 inserts the dc bus that becomes oar frequency variator P; The power output end that becomes oar frequency variator P inserts the three-phase input end of out put reactor, and the three-phase output end of out put reactor inserts the power input that becomes oar motor 22.The secondary signal output terminal of line voltage detection unit D2 inserts the power supply coil of this midget relay K; 90 ° of directions that become oar driver element D4 become the main contact of oar control signal input termination midget relay K, and the power output end that becomes oar driver element D4 connects the power input that becomes oar motor 22.When civil power cuts off the power supply; This midget relay K is in response to the civil power power-off signal of line voltage detection unit D2; Make its main contact that is in normally open closed; Become oar driver element D4 from order and send 90 ° of directions change oar control signals, become the electric current of oar motor 22 to 90 ° of directions change oars by becoming oar frequency variator P output order.
In addition; Preferably second digital signal output end of this change oar protected location D3 can connect a change oar motor braking driver element D5; This change oar motor braking driver element D5 output control signal is connected to the input end of break 23, is used for the braking effect of control brake device 23, and its control mode can adopt various existing technologies well known by persons skilled in the art; The existing technology of this type 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 step-down module M1, and a selectable line voltage testing module M2.Wherein, the input end of DC decompression module M1 is connected in 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 that becomes oar motor 22, is used to control electromotor brake 23 releases and braking.The input end of line voltage testing module M2 then connects the output terminal of civil power S.When civil power cut off the power supply, the 96V direct current behind the civil power power-off signal output buck that this DC decompression unit M1 sends in response to line voltage testing module M2 was given the break 23 that becomes oar motor 22, made break 23 discharge.Further; Said break 23 can adopt the electromagnetic type power-off brake; Be break away from when energising and during outage 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 when restraining coil feeds 96V direct current rear brake 23 at once.
Working principle according to permanent magnetism paddle changing wind power generator group dead electricity feathering control system of the present invention is following:
When line voltage is lower than the threshold value of systemic presupposition; The control power supply promptly breaks off; Line voltage detection unit D2 sends power-off signal, and said Voltage threshold can preestablish according to actual conditions, and the main contact that midget relay K often leaves is closure in response to this power-off signal; Send the frequency change control signal that becomes oar to 90 ° of directions of the blade angle of attack for change oar frequency variator P, the dc powered that change oar frequency variator P utilizes rectifying unit D1 to export becomes oar motor 23 and carries out 90 ° of directions change oars; Meanwhile, become the direct current of oar electromotor brake 23, for example under the galvanic control of 96V, make electromotor brake 23 discharge in dead electricity feathering control unit D6 output.Along with pitch moves closer to 90 ° of angles that facing the wind, the wind speed round of wind-driven generator 1 descends gradually, when wind-driven generator 1 no longer can provide the needed electric energy of change oar motor 22 work, becomes oar motor 22 and quits work.At this moment, the wind wheel of wind-driven generator 1 maybe be also in slow rotation, and the break 23 that becomes oar motor 22 is still at release mode.Preferably; Synchronous vane change device according to the present invention can utilize one set within it portion the rebounding force of spring continue to force blade to become oars to 90 ° of directions; When blade along to 90 ° of positions the time; 90 ° of feather position settings will make break 23 finish releasing state as the 3rd of limit switch near switch, become oar motor 22 thereby by braking fully.
Through behind the said process, the pitch of wind-driven generator possibly also can't reach not wind-engaging angle of 90 ° of directions, if run into strong wind or the severse weather blower fan possibly also can start once more.In this case, if rotation speed of fan reaches requirement, dead electricity feathering control unit D6 still can drive and become oar motor 22 and become oars to 90 ° of directions, drops to appropriate value up to the rotating speed of wind wheel.
In above-mentioned in the working procedure of power permanent magnetic paddle changing wind power generator group; When civil power just often; Civil power is inserted the change oar frequency variator P that becomes oar driver element D4, the power input that becomes the break 23 of oar motor 22; The digital signal that becomes oar protected location D3 is through becoming the control signal input end that oar motor braking driver element D5 is passed to break 23; And the power output end that becomes oar motor braking driver element D5 is connected to the power input of break 23, and become oar motor 22 and driven by civil power this moment.When the civil power dead electricity; Becoming oar motor braking driver element D5 is cisco unity malfunction; This moment, the dead electricity feathering control unit D6 of wind power generating set passed through wind-driven generator 1 direct current supply, and control unit autofeather has been avoided the generation of fault and the danger of driving out of control effectively up to shutdown.
Further advantageously; According to preferred embodiment of the present invention; Change oar motor 22 in the 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 said 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 the loss protecting function; Under the high reliability prerequisite of the normal operation of assurance system; Realize under the no civil power situation that through its dead electricity feathering control system to the protection of whole wind powered generator system, its main feature is:
1) can the real time automatic detection line voltage according to dead electricity feathering control system of the present invention, when mains supply breaks off, start automatically and become the oar feathering and shut down and need not manual operation, thereby avoid wind-driven generator that the danger of driving out of control takes place;
2) reduced the probability of generation mechanical failure owing to having added motor braking and spring reset duplicate protection in the synchronous vane change device;
3) but continuous operation can be implemented the protection of dead electricity feathering in the city power recovery to wind-driven generator before normal incessantly;
4) introduced and become the mechanical structure that oar limit position protective function further prevents synchronous vane change device and damage because of influenced by power failure.
Although the preferable embodiment of the present invention has been described in explanation by way of example above, protection scope of the present invention is not limited in above-mentioned explanation, but is defined by all technical characteristicss and the equivalent technologies characteristic thereof that appended claim provides.Persons skilled in the art it is understandable that, under the essence and marrow prerequisite that does not deviate from the present invention and instructed, and any modification and change and possibly still drop within the protection domain of claim of the present invention.

Claims (8)

1. permanent magnetism paddle changing wind power generator group dead electricity feathering control system; Said wind power generating set comprises a wind-driven generator (1), a synchronous vane change device (2) and control system (3), and wherein said synchronous vane change device (2) comprises that a synchronous blade pitch device (21), becomes an oar motor (22) and a break (23); Said control system (3) comprising:
One rectifying unit (D1), the AC rectification that is used for wind-driven generator (1) output is direct current output;
One line voltage detection unit (D2) is used to detect line voltage and whether is lower than the preset Voltage threshold of control system (3), and when recording system's dead electricity, sends the civil power power-off signal to control system (3);
One becomes oar protected location (D3), is used for controlling according to line voltage the operation of synchronous vane change device (2);
One becomes oar driver element (D4); Comprise that one becomes an oar frequency variator (P) and a midget relay (K), the switching response of said midget relay (K) operationally switches in the civil power power-off signal between the position that is connected with said change oar frequency variator (P) or breaks off;
It is characterized in that said control system (3) also comprises:
One dead electricity feathering control unit (D6), it provides the direct current of step-down to make break (23) keep releasing state in response to the civil power power-off signal to the break (23) that becomes oar motor (22); Thereby under the state that the midget relay (K) that makes said change oar driver element (D4) keeps discharging at break (23), start change oar frequency variator (P) driving change oar motor (22) in response to the civil power power-off signal and make blade rotate to the 90 ° of directions in angle of facining the wind.
2. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1; It is characterized in that said dead electricity feathering control unit (D6) comprises a direct current step-down module (M1); Its input end is connected in the dc output end of rectifying unit (D1), and its output terminal is connected to break (23) power input that becomes oar motor (22).
3. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 2 is characterized in that said dead electricity feathering control unit (D6) also comprises a line voltage testing module (M2).
4. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1 is characterized in that said break (23) is an electromagnetic type dead electricity braking device, break away from when adopting energising and during outage with the frictin braek of spring braking.
5. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1; It is characterized in that; Said synchronous vane change device (2) adopts phase asynchronous variable-frequency motor as becoming oar motor (22); By change oar driver element (D4) frequency conversion drive, thereby realize that wind-driven generator (1) soft start makes whole change oar process milder.
6. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1; It is characterized in that; Said control system (3) comprises that also one is used to detect the change oar position detection unit (J1) of the angular orientation that blade changes; When blade arrives 90 ° of limit positions, become oar motor (22) shutdown through becoming oar protected location (D3) order, finish its releasing state with seasonal break (23).
7. permanent magnetism paddle changing wind power generator group dead electricity feathering control system according to claim 1 is characterized in that, said control system (3) comprises that also one becomes oar motor braking driver element (D5).
8. according to each described permanent magnetism paddle changing wind power generator group dead electricity feathering control system of claim 1-7; It is characterized in that; Also be provided with a spring in the said synchronous blade pitch device (21), its elastic force can continue to force blade to rotate to the 90 ° of directions in angle of facining the wind becoming situation that the oar motor the loses synchronous blade pitch device (21) of ordering.
CN201210111395.3A 2012-04-16 2012-04-16 Power-loss feathering control system for permanent magnet pitch variation wind driven generator set Active CN102606400B (en)

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CN109611469A (en) * 2019-01-23 2019-04-12 山东中车风电有限公司 Electro-magnetic braking device, system and braking method

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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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