CN202718814U - Direct grid wind turbine generating set of synchronous generator - Google Patents
Direct grid wind turbine generating set of synchronous generator Download PDFInfo
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- CN202718814U CN202718814U CN2012203222946U CN201220322294U CN202718814U CN 202718814 U CN202718814 U CN 202718814U CN 2012203222946 U CN2012203222946 U CN 2012203222946U CN 201220322294 U CN201220322294 U CN 201220322294U CN 202718814 U CN202718814 U CN 202718814U
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- generator
- wheel
- generating set
- differential
- synchronous generator
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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
Abstract
The utility model discloses a direct grid wind turbine generating set of a synchronous generator and belongs to the technical field of wind power generating. The direct grid wind turbine generating set of the synchronous generator comprises a tower cylinder, a wind wheel, a cabin and a generator arranged inside the cabin. The generator is connected with the wind wheel through a transmission mechanism, and the transmission mechanism comprises a main shaft, a speed increasing gearbox, a speed regulating device and a coupling. One end of the speed increasing gearbox is connected with the main shaft, and the other end of the speed increasing gearbox is connected with the coupling through the speed adjusting device. The coupling is connected with an input end of the generator, a stator of the generator is directly connected with power grid, and the main shaft is connected with the wind wheel. Due to the fact that the variable speed ratio speed adjusting device with differential technology is adopted, the quality of electric energy of the direct grid wind turbine generating set of the synchronous generator is good, and no high harmonic interference to the power grid exists. The direct grid turbine generating set of the synchronous generator is strong in supporting ability to the power grid in power grid failures, and no low voltage penetrating problem exists. The wind turbine generating system is high in reliability, and the inner structure of a fan is simple and cost is low.
Description
Technical field
The invention belongs to technical field of wind power generation, particularly relate to a kind of wind power generating set of synchronous generator direct grid-connected.
Background technique
Wind-driven generator is widely used current as clean energy resource, and at present the large commercial wind-driven generator mainly has three types: the doubly-fed variable-speed constant-frequency wind-driven generator, partly directly drive vscf generator and directly drive vscf generator.In the middle of these were used, because wind speed is unstable, it was unsettled causing the wind speed round that is comprised of blade and wheel hub.This just makes the frequency of generator output unstable, can't directly generator be connected to the grid.For addressing this problem, all adopted converter plant to make the frequency of generator and the frequency decoupling zero of electrical network, realize that the blower fan of speed change is to the electric energy of electrical network delivered constant frequency.Double-fed generator is that stator directly connects electrical network, rotor connects converter plant, by carry the electric power of slip frequency to rotor, realize the purpose of rotor output constant frequency, below rated speed, the current transformer that rotor connects carries the electric energy of slip frequency to rotor from the electrical network absorbed power, the field current of mains frequency is provided for magnetic field, makes stator produce the electric energy of mains frequency.More than rated speed, the rotor converter plant produces the electric energy of negative slip frequency by to the electrical network transmission power, guarantees that the frequency of rotating magnetic field is identical with electrical network, and stator and rotor are simultaneously to the electrical network transmission of electric energy.It all is to adopt converter plant to convert the electric energy of generator change frequency to direct current and then inversion realizes generating electricity to electrical network that the wind-driven generator that partly directly drives and directly drive is used.
Above-mentioned several technological schemes employing without exception of mentioning converter plant, electrical network is had the shortcomings such as humorous wave interference and ride-through capability under low-voltage state be not good.For this reason, expect to have the device that arrangements for speed regulation can realize the rate conversion that wind wheel changes is become constant speed, adopt synchronous generator directly to connect electrical network, realize such as thermoelectricity or the same generator effect of water power.
Summary of the invention
For the technical problem of above-mentioned existence, the invention provides a kind of wind power generating set of synchronous generator direct grid-connected.It adopts the driving mechanism with arrangements for speed regulation, and the rotating speed that the blower fan input is changed is exported constant rotational speed under the adjusting of arrangements for speed regulation.
The objective of the invention is to be achieved through the following technical solutions:
The present invention includes tower cylinder, wind wheel, cabin and place generator in the cabin, described generator is connected with wind wheel by driving mechanism, described driving mechanism comprises main shaft, speedup box, arrangements for speed regulation and coupling, speedup box one end connects main shaft, the other end connects coupling by arrangements for speed regulation, coupling is connected with the input shaft end of generator, and the stator of generator directly is connected with electrical network, and main shaft is connected with wind wheel.
Described generator is synchronous generator.
Described arrangements for speed regulation comprise:
Input shaft connects speedup box;
Output shaft, identical with its input shaft axle center, by the input shaft end of coupling connection generator;
Sun gear is installed on the described output shaft;
Differential gear is the gear with internal tooth and external tooth, with the sun gear concentric, be installed on the described input shaft, described differential gear respectively with the engagement of motor wheel and planet wheel, and from motor wheel and and planet wheel between have different velocity ratios;
Planet wheel is at least one, is uniformly distributed between sun gear and the differential gear, respectively with sun gear and differential gear engagement;
Motor wheel is connected with differential motor output shaft, and meshes with the differential gear external toothing;
External frame is connected by bearing with input shaft, output shaft end, and connects respectively motor wheel shell and generator set speedup box;
Be equipped with velocity transducer on input shaft, output shaft and the differential motor output shaft, differential motor and each velocity transducer are connected with the controller of generator set respectively.
Described planet wheel is installed on the planetary wheel carrier by its rotating shaft, and planetary wheel carrier is installed on the input shaft by bearing.When described planet wheel is a plurality of, be uniformly distributed along the circumference, be installed on the planetary wheel carrier by its rotating shaft respectively.Described differential gear is fixed on the differential bracket, and differential bracket is installed on the planetary wheel carrier of input shaft end by bearing.Beneficial effect of the present invention:
The present invention adopts the arrangements for speed regulation of the variable gear ratio with differential technique, and its quality of power supply is good, does not have higher harmonics to disturb to electrical network; Enabling capabilities to electrical network during electric network fault is strong, does not have the low voltage crossing problem; The wind powered generator system reliability is high, and the blower fan internal structure is simple, and cost is low.Its arrangements for speed regulation have the machine automatization regulatory function, change the final output speed of speedup box, can have the function of automatic adjusting speed ratio.
This child of speed governing among the present invention is according to the difference of input speed, provide power that motor wheel is rotated by differential motor, engagement driving by planet wheel and sun gear and differential gear, regulate velocity ratio, it can increase or reduce speed increasing ratio as requested, thereby reach the rotating speed effect that changes sun gear, make the output shaft rotating speed reach the generator speed requirement.The present invention can also be used for wind-driven generator speed adjusting technique field.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of arrangements for speed regulation among Fig. 1.
Fig. 3 is the transmission schematic diagram of Fig. 2.
Fig. 4 is planet gear transmission schematic diagram among Fig. 2.
Among the figure: 1, wind wheel, 2, main shaft, 3, speedup box, 4, arrangements for speed regulation, 41, input shaft, 42, sun gear, 43, planet wheel, 431, planetary wheel carrier, 432, rotating shaft, 44, differential gear, 441, differential bracket, 45, motor wheel, 451, motor wheel shell, 46, differential motor, 47, output shaft, 48, external frame, 5, coupling, 6, generator.
Embodiment
Specifically describe the present invention below in conjunction with drawings and Examples.
Embodiment: as shown in Figure 1, the present invention includes: tower cylinder, wind wheel 1, cabin and place generator 6 in the cabin, described generator 6 is synchronous generator, be connected with wind wheel 1 by driving mechanism, described driving mechanism comprises main shaft 2, speedup box 3, arrangements for speed regulation 4 and coupling 5, and speedup box 3 one ends connect main shaft 2, the other end connects coupling 5 by arrangements for speed regulation 4, coupling 5 is connected with the input shaft end of generator 6, and the stator of generator 6 directly is connected with electrical network, and main shaft 2 is connected with wind wheel 1.
Such as Fig. 2-shown in Figure 4, the arrangements for speed regulation 4 that adopt among the present invention comprise:
Sun gear 42 is installed on the output shaft 47;
Be equipped with velocity transducer on input shaft 41, output shaft 47 and differential motor 46 output shafts, differential motor 46 and each velocity transducer are connected with the controller of generator set respectively.The power of motor wheel 45 relies on differential motor 46 to provide, the order that controller is controlled differential motor 46 positive rotary speeds, speed reversal and stopped to pass on according to the speed that detects.
The working principle of arrangements for speed regulation among the present invention: the speedup box of generator set connects input shaft 41 rotations, driving planet wheel 43 rotates, planet wheel 43 is around sun gear 42 engagement revolution, simultaneously rotation drives sun gear 42 and rotates, planet wheel 43 rotations and sun gear 42 have the velocity ratio of adjusting and change the rotating speed effect, differential motor 46 provides power that motor wheel 45 is rotated, motor wheel 45 engagement differential gears 44, differential gear 44 engagement planet wheels 43, rotating speed through twice velocity ratio increase sun gear 42 makes output shaft 47 rotating speeds reach the generator speed requirement.When the rotating speed of input shaft 41 changes, rotating speed increases or reduces, and each velocity transducer detects the variation of rotating speed, feeds back to controller, and controller makes differential motor 46 rotate the speed difference between compensation external drive end and the output shaft 7 by calculating output command.When the rotating speed of input shaft 1 end was lower than the setting rotating speed of output shaft 47, differential motor 46 of the present invention absorbed energy by the direction rotation that increases rotating speed from electrical network.When input shaft 1 end rotating speed was higher than output shaft 7 specific rotation speeds, differential motor 46 was by the direction rotation that reduces rotating speed, and at this moment, differential motor 46 passes through arrangements for speed regulation of the present invention to the electrical network feedback energy.By regulating control principle, make the output speed of arrangements for speed regulation of the present invention when input shaft 41 pace of change, guarantee the invariablenes turning speed of output shaft 47.
Working principle of the present invention: wind wheel 1 is through the wind blows rotation, produce moment of torsion, connect main shaft 2, and transmit rotating speed and moment of torsion by main shaft, main shaft 2 connects speedup box 3, speedup box 3 has accelerating function, output speed is improved, the output shaft of speedup box 3 connects arrangements for speed regulation 4, because the unstable input speed of blower fan that causes of wind-force is also in continuous variation, so arrangements for speed regulation 4 can be regulated automatically according to the different of output speed of speedup box 3, make the final output speed of arrangements for speed regulation 4 keep constant (being the specified generating rotating speed of synchronous generator 6), connected by coupling 5 between arrangements for speed regulation 4 and the generator 6, finally finish whole transmission, make synchronous generator 6 can break away from traditional converter plant and the direct grid-connected generating.
The present invention is applicable fan speed regulation not only, also is applicable to other expectations and will inputs the application that the variation rotating speed converts constant rotational speed to.
Claims (6)
1. the wind power generating set of a synchronous generator direct grid-connected, comprise tower cylinder, wind wheel, cabin and place generator in the cabin, it is characterized in that: described generator is connected with wind wheel by driving mechanism, described driving mechanism comprises main shaft, speedup box, arrangements for speed regulation and coupling, speedup box one end connects main shaft, and the other end connects coupling by arrangements for speed regulation, and coupling is connected with the input shaft end of generator, the stator of generator directly is connected with electrical network, and main shaft is connected with wind wheel.
2. the wind power generating set of synchronous generator direct grid-connected according to claim 1, it is characterized in that: described generator is synchronous generator.
3. the wind power generating set of synchronous generator direct grid-connected according to claim 1, it is characterized in that: described arrangements for speed regulation comprise:
Input shaft connects speedup box;
Output shaft, identical with its input shaft axle center, by the input shaft end of coupling connection generator;
Sun gear is installed on the described output shaft;
Differential gear is the gear with internal tooth and external tooth, with the sun gear concentric, be installed on the described input shaft, described differential gear respectively with the engagement of motor wheel and planet wheel, and from motor wheel and and planet wheel between have different velocity ratios;
Planet wheel is at least one, is uniformly distributed between sun gear and the differential gear, respectively with sun gear and differential gear engagement;
Motor wheel is connected with differential motor output shaft, and meshes with the differential gear external toothing;
External frame is connected by bearing with input shaft, output shaft end, and connects respectively motor wheel shell and generator set speedup box;
Be equipped with velocity transducer on input shaft, output shaft and the differential motor output shaft, differential motor and each velocity transducer are connected with the controller of generator set respectively.
4. the wind power generating set of described synchronous generator direct grid-connected according to claim 3, it is characterized in that: described planet wheel is installed on the planetary wheel carrier by its rotating shaft, and planetary wheel carrier is installed on the input shaft by bearing.
5. the wind power generating set of described synchronous generator direct grid-connected according to claim 3 is characterized in that: when described planet wheel is a plurality of, be uniformly distributed along the circumference, be installed on the planetary wheel carrier by its rotating shaft respectively.
6. the wind power generating set of described synchronous generator direct grid-connected according to claim 3, it is characterized in that: described differential gear is fixed on the differential bracket, and differential bracket is installed on the planetary wheel carrier of input shaft end by bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203222946U CN202718814U (en) | 2012-07-04 | 2012-07-04 | Direct grid wind turbine generating set of synchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203222946U CN202718814U (en) | 2012-07-04 | 2012-07-04 | Direct grid wind turbine generating set of synchronous generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202718814U true CN202718814U (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203222946U Expired - Fee Related CN202718814U (en) | 2012-07-04 | 2012-07-04 | Direct grid wind turbine generating set of synchronous generator |
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| CN (1) | CN202718814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788742A (en) * | 2022-12-14 | 2023-03-14 | 亳州市武伟电力科技有限公司 | Motor belt rotation type power generation system |
-
2012
- 2012-07-04 CN CN2012203222946U patent/CN202718814U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788742A (en) * | 2022-12-14 | 2023-03-14 | 亳州市武伟电力科技有限公司 | Motor belt rotation type power generation system |
| CN115788742B (en) * | 2022-12-14 | 2023-10-27 | 亳州市武伟电力科技有限公司 | Motor belt-rotating type power generation system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20180704 |
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| CF01 | Termination of patent right due to non-payment of annual fee |