CN204967407U - Become access circuit structure of oar system backup power - Google Patents
Become access circuit structure of oar system backup power Download PDFInfo
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- CN204967407U CN204967407U CN201520731392.9U CN201520731392U CN204967407U CN 204967407 U CN204967407 U CN 204967407U CN 201520731392 U CN201520731392 U CN 201520731392U CN 204967407 U CN204967407 U CN 204967407U
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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
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses a become access circuit structure of oar system backup power, back -up source electricity connect the dc bus at the change oar driver that is being arranged in drive change oar motor, its characterized in that: the rated output voltage of back -up source is 100VDC -350VDC, still include the adjustable voltage module, the adjustable voltage module includes IGBT module, IGBT drive circuit, IGBT drive isolation power, controller and reactor, the IGBT module includes IGBT pipe and the 2nd IGBT pipe, the projecting pole of IGBT pipe and the collection electric connection of the 2nd IGBT pipe, the positive terminal of back -up source is connected and component input branch road with the projecting pole electricity of IGBT pipe, the reactor is established ties and is connect on the way is propped up in the input, IGBT drive circuit is connected with the gate pole drive of the 2nd IGBT pipe, IGBT drive circuit still keeps apart the power with the IGBT drive respectively and the controller is connected. The utility model has the advantages of it can be more safe to use, exports more stably, it is unchangeable to keep becoming the torque of oar motor during the electric wire netting falls the electricity, optimizes wind turbine generator system blade drive effect.
Description
Technical field
The utility model belongs to the pitch-controlled system field in wind turbine generator, is specifically related to a kind of place in circuit structure of pitch-controlled system back-up source.
Background technology
Wind turbine generator is a kind of device that clean and reproducible wind energy can be utilized to generate electricity.Pitch-controlled system is one of important component part in wind turbine generator; pitch-controlled system controls the rotating speed of wind wheel by the angle controlling blade; and then control the power output of blower fan; and pitch-controlled system can also make it to suitable slurry position (width of blade direction is parallel with wind direction) by rotating vane, thus fan safe is shut down.
In the use procedure of wind turbine generator, need after electric network power-fail by adjustment of blade angle to feather position to ensure unit safety, therefore be provided with pitch-controlled system back-up source in pitch-controlled system, and utilize this pitch-controlled system back-up source during electric network power-fail for variable pitch driver provides power supply to make it drive pitch motor rotating vane to feather position to guarantee fan safe.
In the place in circuit structure (as shown in Figure 1) of pitch-controlled system back-up source in the prior art, its pitch-controlled system back-up source 1 is connected electrically on two DC buss 2 between AC/DC module 31 in variable pitch driver 3 and DC/AC module 32, namely pitch-controlled system back-up source directly and be connected on variable pitch driver 560VDC DC bus, and the output rated voltage of pitch-controlled system back-up source is 560VDC.But this pitch-controlled system back-up source place in circuit structure has following weak point:
1, the loop voltage at back-up source place higher (560VDC), has larger potential safety hazard when causing safeguarding back-up source.
2, in back-up source discharge process, voltage reduces, when voltage reduces to a certain extent, cannot ensure that circuit normally works, even if the electric energy laid in back-up source is not finished, pitch-controlled system also must must quit work, this just causes the energy storage of back-up source not make full use of, for guaranteeing system worked well, back-up source capacity (weight and volume of back-up source can be caused to increase and increase space and the bearing strength of back-up source placing position, thus increasing the design and manufacture cost of overall system architecture) must be strengthened.
3, in back-up source discharge process, voltage reduces, and variable pitch driver DC bus-bar voltage also will be caused to reduce, and variable pitch driver output current reduces, thus pitch motor Driving Torque is reduced, and reduces the functional reliability of pitch-controlled system.
Therefore applicant considers design one, and use can be safer, exports the place in circuit structure of more stable pitch-controlled system back-up source.
Utility model content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is: how providing one to use can be safer, exports the place in circuit structure of more stable pitch-controlled system back-up source.
In order to solve the problems of the technologies described above, the utility model have employed following technical scheme:
A place in circuit structure for pitch-controlled system back-up source, back-up source is connected electrically in the DC bus in the variable pitch driver for driving pitch motor; The rated output voltage of described back-up source is 100VDC-350VDC; Also comprise adjustable voltage module, described adjustable voltage module comprises IGBT module, IGBT drive circuit, IGBT driving isolation power supply, controller and reactor;
Described IGBT module comprises an IGBT pipe and the 2nd IGBT manages, and the emitter of a described IGBT pipe is electrically connected with the collector electrode of the 2nd IGBT pipe;
The positive terminal of described back-up source is electrically connected with the emitter of a described IGBT pipe and forms and inputs branch road; Described reactor series connection is on described input branch road;
Described IGBT drive circuit is connected with the gate-drive of described 2nd IGBT pipe;
Described IGBT drive circuit is also connected with controller with described IGBT driving isolation power supply respectively.
The circuit working principle of the place in circuit structure of the utility model pitch-controlled system back-up source is: the 2nd IGBT pipe that the pwm signal carrying out self-controller amplifies in rear drive IGBT module through IGBT drive circuit works (turn-on and turn-off).
2nd IGBT pipe conduction period, an IGBT pipe parallel diode cut-off becomes oar back-up source electric current and forms loop by the 2nd IGBT pipe in reactor and IGBT module, and can on reactor store electrical energy;
2nd IGBT pipe blocking interval, reactor releases energy, and the parallel diode conducting in an IGBT pipe also forms loop with DC bus.Reactor induction voltage charges to DC bus after superposing with back-up source voltage (being set to Uin), export the voltage (being set to Uout) of DC bus to, and pass through the time scale of the ON/OFF of control the 2nd IGBT pipe, control the size of DC bus-bar voltage: input and output voltage closes and is: Uout/Uin=1/1-D, wherein D is the duty ratio of the pwm pulse that controller sends, therefore regulate the size of duty ratio namely to promote and regulation output voltage, and stable output voltage can be maintained to variable pitch driver and power, make pitch motor reliably working; When after output voltage stabilization, this makes it possible to use fully electric energy stored in back-up source, substantially increase the utilization ratio of back-up source.Meanwhile, back-up source voltage by prior art output rated voltage be 560VDC, in the utility model, adopt the back-up source of 100VDC-350VDC rated voltage, electric pressure reduces greatly, so also significantly increase back-up source safeguard fail safe.
As preferably, described controller is also connected with the voltmeter signal of the DC bus that can gather in described variable pitch driver.
After implementing above-mentioned improvement, namely controller can record the output voltage on DC bus in real time, thus controls the duty ratio of pwm pulse, to controlling and maintaining the stable voltage exporting DC bus to.
As preferably, a described IGBT pipe and the 2nd IGBT pipe are the N-type IGBT pipe being parallel with backward diode between emitter and collector electrode.
As preferably, the model that described IGBT module adopts is the chip of FF150R12YT3.
As preferably, described controller adopts model to be the chip of TMS320F28335.
As preferably, described IGBT drive circuit adopts model to be the chip of IED020I.
As preferably, described IGBT driving isolation power circuit adopts model to be the modular power source of QA04.
Compared with the existing technology comparatively, the place in circuit structure of the utility model pitch-controlled system back-up source has following useful technique effect:
1, reduce back-up source voltage, increase maintenance safe.
2, make full use of back-up source energy storage, reduce back-up source capacity.
3, back-up source interdischarge interval stable DC busbar voltage, keeps pitch motor Driving Torque.
4, by the place in circuit structure of pitch-controlled system back-up source of the present utility model, can also widen and become oar back-up source voltage range of choice, strengthen and become oar back-up source configuration flexibility; During electric network power-fail, keep pitch motor torque constant, optimize wind power generation unit blade and drive effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the place in circuit structure of pitch-controlled system back-up source in prior art.
Fig. 2 is the structural representation of the place in circuit structure of pitch-controlled system back-up source of the present utility model.
Fig. 3 is the circuit theory diagrams of the adjustable voltage module in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.Wherein, adopt the exemplary term such as such as upper and lower, left and right for description, object is to help reader understanding, and is not intended to limit.
During concrete enforcement: as shown in Figure 1 to Figure 3, a kind of place in circuit structure of pitch-controlled system back-up source 1, back-up source 1 is connected electrically in the DC bus in the variable pitch driver 3 for driving pitch motor;
The rated output voltage of described back-up source 1 is 100VDC-350VDC; Also comprise adjustable voltage module 5, described adjustable voltage module 5 comprises IGBT module 6, IGBT drive circuit 7, IGBT driving isolation power supply 8, controller 9 and reactor 10;
Described IGBT module 6 comprises an IGBT pipe 61 and the 2nd IGBT pipe 62, and the emitter e of a described IGBT pipe 61 is electrically connected with the collector electrode c of the 2nd IGBT pipe 62;
The positive terminal of described back-up source 1 is electrically connected with the emitter e of a described IGBT pipe 61 and forms and inputs branch road; The series connection of described reactor 10 is on described input branch road;
Described IGBT drive circuit 7 drives with the gate pole G of described 2nd IGBT pipe 62 and is connected;
Described IGBT drive circuit 7 is also connected with controller 9 with described IGBT driving isolation power supply 8 respectively.
IGBT manages (English full name is: InsulatedGateBipolarTransistor) Chinese: insulated gate bipolar transistor, the compound full-control type voltage driven type power semiconductor be made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), the advantage, the switching speed that have the high input impedance of MOSFET and low conduction voltage drop two aspect of GTR concurrently are fast, reliability is higher, is adapted at practical in the higher wind turbine generator of reliability requirement.
Wherein, described controller 9 also has the signal input part that can gather voltage signal; Described signal input part is connected with the signal output part of the voltmeter (not shown) be connected electrically between described two DC buss.
Wherein, described IGBT drive circuit 7 adopts model to be the chip of IED020I.
Wherein, described controller 9 adopts model to be the chip of TMS320F28335.
Wherein, described IGBT driving isolation power supply 8 adopts model to be the modular power source of QA04.
The place in circuit structure of above-mentioned pitch-controlled system back-up source 1 in use, sends PMW signal by controller 9 and amplifies rear drive the 2nd IGBT pipe 62 through IGBT drive circuit 7 and work (turn-on and turn-off), and the 2nd IGBT pipe 62 is used as copped wave IGBT and manages.
2nd IGBT pipe 62 conduction period, back-up source 1 electric current forms loop by reactor 10 and IGBT module 6, and can on reactor 10 store electrical energy; One IGBT pipe 61 is used as isolating diode.
2nd IGBT pipe 62 blocking interval, reactor 10 releases energy, and forms loop with DC bus.Controller 9 controls to export to the voltage (Uout) of DC bus by the duty ratio D of the pwm pulse sent, and is voltage after reactor 10 induced voltage and back-up source 1 voltage superposition according to Uout/Uin=1/1-D, Uin:
Such as: the rated output voltage of back-up source 1 is 280VDC; As D=0.5, then Uout=Uin* (1/ (1-D)), i.e. Uout=280*(1/1-0.5))=280*2=560VDC, namely can the rated voltage of stable output to DC bus.
When by voltmeter, controller 9 detects that Uout reduces, at this moment namely by controlling duty ratio D, Uout is regulated, such as: as instantaneous Uout=500VDC, now Uin=250VDC, D=0.5, for ensureing that output voltage stabilization is at 560VDC, now should adjust D is as calculated, D=1-Uin/Uout=1-280/560=0.5, namely PMW duty ratio D=0.5 is inputted by controller, the output voltage of Uout can be stablized so again rapidly to 560VDC, thus make pitch-controlled system overall operation more reliable and stable.
Below be only the utility model preferred embodiment; need point out be; for those skilled in the art under the prerequisite not departing from the technical program, can also make some distortion and improvement, the technical scheme of above-mentioned distortion and improvement should be considered as falling into the scope that this application claims protection equally.
Claims (7)
1. a place in circuit structure for pitch-controlled system back-up source, back-up source is connected electrically in the DC bus in the variable pitch driver for driving pitch motor; It is characterized in that:
The rated output voltage of described back-up source is 100VDC-350VDC; Also comprise adjustable voltage module, described adjustable voltage module comprises IGBT module, IGBT drive circuit, IGBT driving isolation power supply, controller and reactor;
Described IGBT module comprises an IGBT pipe and the 2nd IGBT manages, and the emitter of a described IGBT pipe is electrically connected with the collector electrode of the 2nd IGBT pipe;
The positive terminal of described back-up source is electrically connected with the emitter of a described IGBT pipe and forms and inputs branch road; Described reactor series connection is on described input branch road;
Described IGBT drive circuit is connected with the gate-drive of described 2nd IGBT pipe;
Described IGBT drive circuit is also connected with controller with described IGBT driving isolation power supply respectively.
2. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: described controller is also connected with the voltmeter signal of the DC bus that can gather in described variable pitch driver.
3. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: a described IGBT pipe and the 2nd IGBT pipe are the N-type IGBT pipe being parallel with backward diode between emitter and collector electrode.
4. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: the model that described IGBT module adopts is the chip of FF150R12YT3.
5. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: described controller adopts model to be the chip of TMS320F28335.
6. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: described IGBT drive circuit adopts model to be the chip of IED020I.
7. the place in circuit structure of pitch-controlled system back-up source according to claim 1, is characterized in that: described IGBT driving isolation power circuit adopts model to be the modular power source of QA04.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731392.9U CN204967407U (en) | 2015-09-21 | 2015-09-21 | Become access circuit structure of oar system backup power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520731392.9U CN204967407U (en) | 2015-09-21 | 2015-09-21 | Become access circuit structure of oar system backup power |
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| CN204967407U true CN204967407U (en) | 2016-01-13 |
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| CN201520731392.9U Active CN204967407U (en) | 2015-09-21 | 2015-09-21 | Become access circuit structure of oar system backup power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253459A (en) * | 2016-08-17 | 2016-12-21 | 上海电机学院 | A kind of access circuit structure of wind generating set pitch control and master control back-up source |
| CN109474018A (en) * | 2018-12-28 | 2019-03-15 | 重庆科凯前卫风电设备有限责任公司 | A kind of paddle change system of wind turbines high voltage crossing control system and method |
-
2015
- 2015-09-21 CN CN201520731392.9U patent/CN204967407U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253459A (en) * | 2016-08-17 | 2016-12-21 | 上海电机学院 | A kind of access circuit structure of wind generating set pitch control and master control back-up source |
| CN109474018A (en) * | 2018-12-28 | 2019-03-15 | 重庆科凯前卫风电设备有限责任公司 | A kind of paddle change system of wind turbines high voltage crossing control system and method |
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