CN202906824U - Direct-current-output non-grid-connected wind generating set - Google Patents
Direct-current-output non-grid-connected wind generating set Download PDFInfo
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- CN202906824U CN202906824U CN201220391097XU CN201220391097U CN202906824U CN 202906824 U CN202906824 U CN 202906824U CN 201220391097X U CN201220391097X U CN 201220391097XU CN 201220391097 U CN201220391097 U CN 201220391097U CN 202906824 U CN202906824 U CN 202906824U
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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
A direct-current-output non-grid-connected wind generating set comprises a turbine (1), a speed-up gear box (2), a generator (3), a current transformer (4) and a motor excitation unit (8). The wind generating set is characterized in that the turbine (1) is connected with a low speed shaft of the speed-up gear box (2); a high speed shaft of the speed-up gear box (2) is connected with the generator (3); a stator output terminal of the generator (3) is connected with the current transformer (4) and the motor excitation unit (8) is connected with an exciter of the generator and controls an exciting current of the synchronous electrical excitation generator (3); the output terminal of the current transformer (4) is connected with a direct current load so as to provide power for the load. By using the wind generating set of the utility model, off-grid operation of the set is easy to realize; a complex and expensive AC-DC-AC current transformer of the grid-connected set is omitted so that cost is reduced, operation stability of the set is increased and reactive power control is avoided.
Description
Technical field:
The utility model relates to a kind of non-grid type wind turbine generator, and the direct current of unit output is the highly energy-consuming customer power supply, belongs to the wind-powered electricity generation technical field of new energies.
Background technology:
Wind energy is as a kind of clean energy resource, and the status in the energy-saving and emission-reduction in the world becomes more and more important.In recent years, as the device of wind energy transformation electric energy---the design of wind turbine generator, buying, application are more and more ripe and diversified.The type control model is from deciding oar stall to variable-pitch variable-speed; Power is from the kW level to MW level unit; The ratio of wind-powered electricity generation in electrical network is also large from little change.
Wind has randomness and unsteadiness, causes the electric energy that is connected to the grid also to have fluctuation.The ratio that wind-powered electricity generation accounts in electrical network is increasing, when falling in short-term appears in line voltage, wind turbine generator will the large tracts of land off-grid, cause electrical network to fall more serious, so the electrical network of every country has proposed the standard of low voltage crossing to wind turbine generator.
Yet, mainstream model is that double-fed variable speed constant frequency unit is seen accompanying drawing 2 at present, because the stator side of double-fed asynchronous generator directly links to each other with electrical network, when line voltage falls in short-term, there is very large overcurrent in the rotor side, and in voltage recovery process, need provide a certain proportion of reactive power support, therefore realize that the low voltage crossing standard is more difficult.
Wind turbine generator comprises: turbine 1, gear box 2(direct-driving type unit do not comprise), generator 3, current transformer 4, the electricity that generator sends is converted into the direct feed-in electrical network of electric current electric energy of constant frequency, constant voltage by current transformer, current transformer is a kind of power-converting device, opening and turn-offing, the amplitude of regulation output voltage, electric current, frequency by the control switch pipe.The grid type current transformer has following two kinds of forms at present, all adopt switching tube, also voltage and frequency fluctuation, voltage flicker, harmonic wave are incorporated into public electric wire net, thereby affect the quality of power supply of electrical network when therefore, wind turbine generator is with electric energy feed-in electrical network points of common connection (PCC).
(1) uncontrollable diode rectification+IGBT inversion is applicable to partly directly drive, the direct wind-driven generator group, sees Fig. 3.
(2) IGBT rectification+IGBT inversion is applicable to double-fed, partly directly drives, the direct wind-driven generator group, sees Fig. 4.
The large electricity consumer of a lot of highly energy-consumings, industries such as residential quarter heating, chemical industry electrolysis, desalinization needs direct current supply, and the fluctuation to electric energy is not strict with, and the direct current of these large electric currents is mainly still provided by utility grid at present, and utility grid will be in the situation that these enterprises of electricity shortage will face the risk that has a power failure and stop work.
The utility model content:
The purpose of this utility model is opened up a kind of power generation mode novel, simple in structure for wind power generation, and a kind of cost is low, the electric energy of cleaning for the highly energy-consuming large electricity consumer provides, and solves the problems referred to above that exist in the background technology.
Technical solutions of the utility model are:
A kind of wind turbine generator of direct current output comprises: turbine, step-up gear, generator, current transformer, motor excitation unit; Turbine is connected with the slow-speed shaft of step-up gear, and the high speed shaft of gear box is connected with generator, and the stator output of generator is connected with current transformer, the excitation unit is connected with the exciter of generator, the exciting current size of control synchronous electric excitation generator; Output and the DC load of current transformer are connected to load supplying.
Further, described turbine is made of blade, wheel hub and pitch-controlled system.
Further, the gearratio of described step-up gear is in the scope of 20:1～90:1.
Further, described generator is synchronous electric excitation generator or magneto alternator.
Further, described current transformer is by one group of three-phase uncontrollable diode rectification unit or organize the unit parallel connection of the uncontrollable diode rectification of three-phase more and consist of, and described motor excitation unit is made of one group of DC chopper circuit.
The beneficial effects of the utility model are:
The size of the exciting current by control synchronous electric excitation generator, the size of control unit power output is avoided the pattern that the double-fed type must net side elder generation excitation, realizes that more easily unit is from network operation; Use ripe pitch-controlled system to guarantee that unit is constant in the above power output of rated wind speed, avoid blade to enter stall conditions; Use simple, classical uncontrollable diode rectification, save complicated, the expensive AC-DC-AC converter of grid type unit, thereby reduce cost, raising unit operation stability, avoided Reactive Power Control.
Description of drawings:
The non-grid type wind generating set structure schematic diagram of Fig. 1 the utility model direct current output.
The structural representation of Fig. 2 double-fed wind power generator group.
The uncontrollable diode rectification of Fig. 3+IGBT inverter/converter topology diagram.
Fig. 4 IGBT rectification+IGBT inverter/converter topology diagram.
Wherein 1 is that turbine, 2 is that step-up gear, 3 is that generator, 4 is that current transformer, 5 is that stator circuit breaker, 6 is that the soft unit, 7 that opens of current transformer is that transformer, 8 is that motor excitation unit, 9 is DC load.
Embodiment:
Below in conjunction with accompanying drawing the utility model is described in detail.
Referring to Fig. 1, a kind of wind turbine generator of direct current output comprises: turbine 1, step-up gear 2, generator 3, current transformer 4, motor excitation unit 8.Described turbine 1 is made of blade, wheel hub and pitch-controlled system.All parts of pitch-controlled system all are installed on the wheel hub.Pitch-controlled system is controlled the rotating speed of wind wheel by the angle of control blade, and then the power output of control blower fan, and can make by the mode of aerodynamic braking the blower fan safe shutdown.
The gearratio of described step-up gear 2 is in the scope of 20:1 → 90:1, described generator 3 is synchronous electric excitation generator or magneto alternator, described current transformer 4 is at least by one group of three-phase uncontrollable diode rectification unit or organize the unit parallel connection of the uncontrollable diode rectification of three-phase more and consist of, described motor excitation unit belongs to current transformer 4, is made of one group of DC chopper circuit.
Claims (5)
1. a direct current is exported non-grid type wind turbine generator, comprising: turbine (1), step-up gear (2), generator (3), current transformer (4), motor excitation unit (8); It is characterized in that: turbine (1) is connected with the slow-speed shaft of step-up gear (2), the high speed shaft of gear box (2) is connected with generator (3), the stator output of generator (3) is connected with current transformer (4), excitation unit (8) are connected with the exciter of generator, the exciting current size of control synchronous electric excitation generator (3); Output and the DC load of current transformer (4) are connected to load supplying.
2. direct current according to claim 1 is exported non-grid type wind turbine generator, it is characterized in that: described turbine is made of blade, wheel hub and pitch-controlled system.
3. direct current according to claim 1 and 2 is exported non-grid type wind turbine generator, it is characterized in that: the gearratio of described step-up gear is in the scope of 20:1～90:1.
4. direct current according to claim 1 is exported non-grid type wind turbine generator, it is characterized in that: described generator is synchronous electric excitation generator or magneto alternator.
5. direct current according to claim 1 is exported non-grid type wind turbine generator, it is characterized in that: described current transformer is by one group of three-phase uncontrollable diode rectification unit or organize the unit parallel connection of the uncontrollable diode rectification of three-phase more and consist of, and described motor excitation unit is made of one group of DC chopper circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220391097XU CN202906824U (en) | 2012-08-08 | 2012-08-08 | Direct-current-output non-grid-connected wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220391097XU CN202906824U (en) | 2012-08-08 | 2012-08-08 | Direct-current-output non-grid-connected wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN202906824U true CN202906824U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220391097XU Expired - Fee Related CN202906824U (en) | 2012-08-08 | 2012-08-08 | Direct-current-output non-grid-connected wind generating set |
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| CN (1) | CN202906824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405587A (en) * | 2014-11-28 | 2015-03-11 | 新疆中科捷高光电科技有限公司 | Small off-network wind power generation system and wind power prediction method |
-
2012
- 2012-08-08 CN CN201220391097XU patent/CN202906824U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405587A (en) * | 2014-11-28 | 2015-03-11 | 新疆中科捷高光电科技有限公司 | Small off-network wind power generation system and wind power prediction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MONGOLIA GEOHO ENERGY TECHNOLOGY CO.,LTD. Free format text: FORMER OWNER: XI'AN GEOHO ENERGY TECHNOLOGY CO., LTD. Effective date: 20140617 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 710016 XI'AN, SHAANXI PROVINCE TO: 017000 ORDOS, INNER MONGOLIA AUTONOMOUS REGION |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140617 Address after: 017000 equipment manufacturing base of Erdos City, the Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Geoho Energy Technology Co., Ltd. Address before: 710016 No. ten, No. 99, Fengcheng Road, Shaanxi, Xi'an Patentee before: Xi'an Geoho Energy Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: NEI MONGGOL GEOHO ENERGY EQUIPMENT CO., LTD. Free format text: FORMER OWNER: MONGOLIA GEOHO ENERGY TECHNOLOGY CO.,LTD. Effective date: 20150331 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150331 Address after: 017000 the Inner Mongolia Autonomous Region Erdos City Dongsheng equipment manufacturing base Patentee after: INNER MONGOLIA GEOHO ENERGY EQUIPMENT CO., LTD. Address before: 017000 equipment manufacturing base of Erdos City, the Inner Mongolia Autonomous Region Patentee before: Inner Mongolia Geoho Energy Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20180808 |