CN102638056A - Direct-drive type grid-connected wind generating set - Google Patents
Direct-drive type grid-connected wind generating set Download PDFInfo
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- CN102638056A CN102638056A CN2012101187586A CN201210118758A CN102638056A CN 102638056 A CN102638056 A CN 102638056A CN 2012101187586 A CN2012101187586 A CN 2012101187586A CN 201210118758 A CN201210118758 A CN 201210118758A CN 102638056 A CN102638056 A CN 102638056A
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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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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a direct-drive type grid-connected wind generating set, comprising a generator. A generator rotor of the generator is fixed on a spindle; the spindle is connected with a hub; a wind wheel blade is connected with the hub; a generator stator of the generator comprises a plurality of sets of stator windings; each set of stator winding is connected with a set of converter through a respective winding outgoing line and a motor-side breaker; each converter is connected with low-voltage side three-phase power of a step-up transformer of the entire power generating set; and a high-voltage side of the step-up transformer is connected with a power grid. According to the wind generating set provided by the invention, the individual and parallel operation of a connected grid can be realized by the stator windings through the converters, so that the operation reliability of the set can be improved, rated voltage grades of the converters and a motor can be reduced, and the designing and manufacturing difficulty and the research and development cost of the set by using a large-capacity full-power converter can be reduced.
Description
Technical field
The present invention relates to a kind of direct-drive type wind power generator incorporated in power network group, belong to the wind generating technology application.
Background technology
In recent years, along with the large quantities of offshore wind farm project implementations of the European countries that with Britain are representative, offshore wind farm had become bright spot and had caused that the investment tide and various countries paid close attention to.Along with offshore wind farm is further paid close attention in the world, increasing supplier throws oneself among the research and development competition of large-scale wind electricity unit.During the 2011-2015, the wind-powered electricity generation annual increment of China is between 15～20GW, wherein about the newly-increased every year on average 1GW of offshore wind farm according to estimates.Expected for the year ends 2015, China's offshore wind farm accumulative total installation is expected to reach 5,000,000 kilowatts, and to the year two thousand twenty, China's offshore wind farm accumulative total installation is expected to reach 3,000 ten thousand kilowatts.In the face of the rapid growth of the marine market demand, various countries have begun increasing offshore wind farm research and development.In order to reduce marine installation and maintenance cost, thereby reduce the cost of electricity-generating of offshore wind farm, the single-machine capacity maximization is an important trend of offshore wind farm development.In order to adapt to the offshore wind farm Development Trend, the industrialization of large-scale offshore wind farm unit, ultra-large type offshore wind farm unit as the preparation of the marine type of the next generation also just in design studies.
At present, single-machine capacity maximization, reliability height and the little offshore wind farm machine set technology developing direction that become of maintenance.The offshore wind farm set structure is complicated, and installation, debugging, maintenance and service technique difficulty are big, and construction cost is high, and for reducing the offshore wind farm development cost, offshore wind farm unit single-machine capacity constantly continues to increase.The regular maintenance cost of offshore wind turbine is also extremely expensive, therefore requires the unit maintenance amount as far as possible little.Though that the double-fed unit has is little like the current transformer capacity, motor is ripe and light characteristics such as little, has gear box, makes maintenance cost high relatively, and controls relative complex.The direct drive wind power unit of non-gear box is compared the maintenance that double-fed type wind-powered electricity generation unit can reduce the unit fault that causes owing to the gear box problem effectively; Can effectively improve the operational reliability and the life-span of system; Reduce maintenance cost; Be specially adapted to offshore wind farm unit exploitation, help accelerating the construction progress of marine wind electric field, after being large-scale and ultra-large type offshore wind farm unit essential technology path.
Large-scale and ultra-large type direct-driving type wind-powered electricity generation unit adopts full power convertor to be incorporated into the power networks; If adopt a full power convertor to realize set grid-connection, will bring following problem: one, the current transformer capacity is big, for satisfying the requirement of grid-connected converter electric current restriction; Need to improve the current transformer load voltage value; But not only there is certain degree of difficulty in high-vol in design, and on cost, compare with low volage current transformer can be high a lot, and that is that all right in wind-powered electricity generation is used is ripe for high-vol at present; Consider from the unit operational reliability that two, cause current transformer itself not work if any problem appears in current transformer, this will make whole unit out of service, the utilance of whole unit and energy output will reduce.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art problems and shortcomings, a kind of large-scale direct-drive type wind power generator incorporated in power network group is provided, can improve unit operation reliability and economy.
To achieve these goals, the present invention adopts following technical scheme:
A kind of direct-drive type wind power generator incorporated in power network group; Comprise a generator; The generator amature of said generator is fixed on the main shaft, and said main shaft is connected with a wheel hub, is connected with wind wheel blade on the said wheel hub; The generator unit stator of said generator comprises many cover stator winding; The all winding outlets through separately of said every suit stator winding, motor side circuit breaker and a cover current transformer are connected, and said every suit current transformer is connected to the low-pressure side three-phase electricity of the step-up transformer of whole wind turbine generator again through the circuit breaker that is incorporated into the power networks separately, and the high-pressure side of said step-up transformer is connected with electrical network.
Further, said stator winding quantity is even number, and identical with said current transformer quantity.
Further, said stator winding is 2 covers or 4 covers.
Further, said many cover current transformers are controlled by a main convertor controller, can realize that many cover current transformers are incorporated into the power networks simultaneously; Said motor overlaps the stator winding separate operation in back of being incorporated into the power networks more, if wherein one or part current transformer or winding failure, the winding or the current transformer that do not influence other normally move.
Further, said wind turbine generator is a 8-15MW grid connected wind power unit, is equipped with in the said wheel hub to become oar adjusting drive system, and said wind wheel blade is served as reasons and become the segmented blade of unifying to become oar and/or independent pitch that oar is regulated drive system control.
Further, also be fixed with a brake disc on the said main shaft.
Further, said generator is the direct-drive type synchronous generator, and said synchronous generator is a kind of in magneto alternator, conventional electric excitation synchronous generator, the superconduction synchronous generator.
Compared with prior art, the present invention has following beneficial effect:
1, the wind-powered electricity generation set generator adopts many cover stator winding and overlaps current transformer more and be incorporated into the power networks, and improves system's operational reliability.Many cover stator winding and the separate operation of current transformer, if having a current transformer or stator winding to break down, with the normal operation that does not influence other winding and current transformer, unit can fall to hold and continue operation.
2, unit adopts the parallel connection of many cover current transformers to be incorporated into the power networks, and can reduce the electric pressure of current transformer; And the capacity of every current transformer is low relatively, can use the ripe current transformer product of present wind-powered electricity generation product, has reduced unit and has only adopted a big capacity current transformer to manufacture and design difficulty and R&D costs.
3, unit adopts the even number design of Windings, can carry out motor to dragging experiment through certain connection, and promptly a part of winding is as electronic winding, and a part of winding is as the generating winding.
4, the many covers current transformer in the unit is controlled by a main convertor controller, can realize that many cover current transformers are incorporated into the power networks simultaneously.
5, for the large-scale wind power generator incorporated in power network group of 8-15MW, can adopt the change oar to regulate drive system according to real needs the segmented blade is unified to become oar control and/or independent feathering control, control mode be various.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is a direct-drive type wind power generator incorporated in power network group system structural representation of the present invention.
Embodiment:
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Like Fig. 1 institute; A large-scale wind power generator incorporated in power network group embodiment provided by the present invention; It adopts the direct-drive type driving-chain, specifically comprises a generator 15, and the generator amature 4 of generator 15 is fixed on the main shaft 3; Main shaft 3 is connected with a wheel hub 2; Be connected with wind wheel blade 1 on the wheel hub 2, the generator unit stator 5 of generator 15 comprises many cover stator winding, and every suit stator winding all winding outlet 13, the motor side circuit breaker 6 and through separately overlaps current transformer 7 and is connected; Every cover current transformer 7 is connected to the low-pressure side three-phase electricity 9 of the step-up transformer 10 of whole wind turbine generator through the circuit breaker 8 that is incorporated into the power networks separately, and said step-up transformer 10 high-pressure sides are connected with electrical network 11.
Can know that based on said structure this unit wind wheel blade 1 directly drives generator amature 4 through wheel hub 2 and main shaft 3 and rotates, and saves intermediate gear box raising speed device, the unit failure rate is low relatively, and maintenance cost reduces.Simultaneously, unit adopts many cover current transformer 7 parallel-connection structures to be incorporated into the power networks, like this can be under the situation that satisfies the set grid-connection demand; Through the converter system shunting, increase the total current that is incorporated into the power networks, reduce the current transformer grade of rated voltage; Improve the current transformer operational reliability, reduce the current transformer cost.Motor overlaps the stator winding separate operation in back of being incorporated into the power networks more, if wherein part current transformer or winding failure, the winding or the current transformer that do not influence other normally move.
In the above-described embodiments, the stator winding quantity of generator 15 is even number, and identical with current transformer 7 quantity; Stator winding is generally 2 covers or 4 covers.Unit adopts the even number design of Windings, can carry out motor to dragging experiment through certain connection, and promptly a part of winding is as electronic winding, and a part of winding is as the generating winding.
In the above-described embodiments, overlap current transformer 7 more and can control, can realize that many cover current transformers 7 are incorporated into the power networks simultaneously by a master controller.
In the above-described embodiments; Grid connected wind power unit for 8-15MW; Change oar adjusting drive system 12 is installed in the wheel hub 2, and wind wheel blade 1 is served as reasons and is become the segmented blade of unifying to become oar and/or independent pitch that oar is regulated drive system 12 controls, and the control mode of change oar adjusting drive system 12 is various.
In the above-described embodiments, also be fixed with a brake disc 14 on the main shaft 3.
In the above-described embodiments, directly driving generator can magneto alternator, a kind of in conventional electric excitation synchronous generator or the superconduction synchronous generator.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. direct-drive type wind power generator incorporated in power network group; Comprise a generator, the generator amature of said generator is fixed on the main shaft, and said main shaft is connected with a wheel hub; Be connected with wind wheel blade on the said wheel hub; It is characterized in that the generator unit stator of said generator comprises many cover stator winding, said every suit stator winding all winding outlet, the motor side circuit breaker and through separately overlaps current transformer and is connected; Said every suit current transformer is connected to the low-pressure side three-phase electricity of the step-up transformer of whole wind turbine generator again through the circuit breaker that is incorporated into the power networks separately, the high-pressure side of said step-up transformer is connected with electrical network.
2. wind turbine generator according to claim 1 is characterized in that, said stator winding quantity is even number, and identical with said current transformer quantity.
3. wind turbine generator according to claim 2 is characterized in that, said stator winding is 2 covers or 4 covers.
4. according to claim 1,2 or 3 described wind turbine generator, it is characterized in that said many cover current transformers are controlled by a main convertor controller.
5. according to claim 1,2 or 3 described wind turbine generator; It is characterized in that; Said wind turbine generator is a 8-15MW grid connected wind power unit; The change oar is installed in the said wheel hub regulates drive system, said wind wheel blade is served as reasons and is become the segmented blade of unifying to become oar and/or independent pitch that oar is regulated drive system control.
6. according to claim 1,2 or 3 described wind turbine generator, it is characterized in that, also be fixed with a brake disc on the said main shaft.
7. according to claim 1,2 or 3 described wind turbine generator, it is characterized in that said generator is the direct-drive type synchronous generator, said synchronous generator is a kind of in magneto alternator, conventional electric excitation synchronous generator, the superconduction synchronous generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101187586A CN102638056A (en) | 2012-04-20 | 2012-04-20 | Direct-drive type grid-connected wind generating set |
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| CN2012101187586A CN102638056A (en) | 2012-04-20 | 2012-04-20 | Direct-drive type grid-connected wind generating set |
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| CN102638056A true CN102638056A (en) | 2012-08-15 |
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| CN2012101187586A Pending CN102638056A (en) | 2012-04-20 | 2012-04-20 | Direct-drive type grid-connected wind generating set |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762615A (en) * | 2014-01-02 | 2014-04-30 | 兰州交通大学 | Megawatt grid connection converter |
| CN104297676A (en) * | 2014-09-19 | 2015-01-21 | 北京天诚同创电气有限公司 | Method, device and system for monitoring circuit breaker of wind generating set |
| CN109449990A (en) * | 2018-12-20 | 2019-03-08 | 上海交通大学 | A kind of permanent magnet direct-drive wind generator system and control method |
| CN111720265A (en) * | 2019-03-21 | 2020-09-29 | 北京金风科创风电设备有限公司 | Wind turbine generator system comprising multiple windings, control method and control device thereof |
| CN112145347A (en) * | 2020-09-03 | 2020-12-29 | 上海电气风电集团股份有限公司 | Wind power generation system and control method and device thereof |
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| US4418287A (en) * | 1978-10-10 | 1983-11-29 | Power Group International Corporation | Wind power generator and control therefore |
| CN201173168Y (en) * | 2008-04-01 | 2008-12-31 | 江西麦德风能股份有限公司 | Direct-drive type wind power generator |
| CN101465606A (en) * | 2008-09-17 | 2009-06-24 | 刘建政 | Parallel-in converter for directly-driving wind power generation system |
| CN201750164U (en) * | 2010-08-11 | 2011-02-16 | 华锐风电科技(江苏)有限公司 | Multi-converter based wind generator set |
| CN102157958A (en) * | 2011-03-22 | 2011-08-17 | 深圳市禾望电气有限公司 | Wind generating unit using multiple-winding generator |
| CN202550587U (en) * | 2012-04-20 | 2012-11-21 | 国电联合动力技术有限公司 | Direct drive type grid-connected wind generating set |
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2012
- 2012-04-20 CN CN2012101187586A patent/CN102638056A/en active Pending
Patent Citations (6)
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| US4418287A (en) * | 1978-10-10 | 1983-11-29 | Power Group International Corporation | Wind power generator and control therefore |
| CN201173168Y (en) * | 2008-04-01 | 2008-12-31 | 江西麦德风能股份有限公司 | Direct-drive type wind power generator |
| CN101465606A (en) * | 2008-09-17 | 2009-06-24 | 刘建政 | Parallel-in converter for directly-driving wind power generation system |
| CN201750164U (en) * | 2010-08-11 | 2011-02-16 | 华锐风电科技(江苏)有限公司 | Multi-converter based wind generator set |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762615A (en) * | 2014-01-02 | 2014-04-30 | 兰州交通大学 | Megawatt grid connection converter |
| CN104297676A (en) * | 2014-09-19 | 2015-01-21 | 北京天诚同创电气有限公司 | Method, device and system for monitoring circuit breaker of wind generating set |
| CN109449990A (en) * | 2018-12-20 | 2019-03-08 | 上海交通大学 | A kind of permanent magnet direct-drive wind generator system and control method |
| CN111720265A (en) * | 2019-03-21 | 2020-09-29 | 北京金风科创风电设备有限公司 | Wind turbine generator system comprising multiple windings, control method and control device thereof |
| CN111720265B (en) * | 2019-03-21 | 2023-09-05 | 北京金风科创风电设备有限公司 | Wind power generator set comprising multiple windings, control method thereof and control device thereof |
| CN112145347A (en) * | 2020-09-03 | 2020-12-29 | 上海电气风电集团股份有限公司 | Wind power generation system and control method and device thereof |
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Application publication date: 20120815 |