CN114285068A - Wind power generation collection system with fans connected in parallel and networked - Google Patents
Wind power generation collection system with fans connected in parallel and networked Download PDFInfo
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- CN114285068A CN114285068A CN202111362665.3A CN202111362665A CN114285068A CN 114285068 A CN114285068 A CN 114285068A CN 202111362665 A CN202111362665 A CN 202111362665A CN 114285068 A CN114285068 A CN 114285068A
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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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Abstract
The invention discloses a wind power generation collection system with fans connected in parallel and networked. The wind power generation collecting system comprises a wind turbine generator, a generator converter and a grid-side boosting device; the output ends of the plurality of network side boosting devices are connected in parallel, the plurality of network side boosting devices connected in parallel form a fan string, the output ends of the plurality of fan strings are connected in series, the plurality of fan strings connected in series form a fan cluster, the three fan clusters are connected in star or in triangular form to form a fan group, and the output end of the fan group is the output end of the wind power generation convergence system; the unit converter is used for converting the first alternating current electric energy into direct current electric energy, the grid-side boosting device is used for converting the direct current electric energy into second alternating current electric energy, and the voltage level of the second alternating current electric energy is higher than that of the direct current electric energy. Therefore, the wind power generation collecting system can combine three-phase alternating current electric energy in a series-parallel connection mode through the output end of the grid side boosting device, and the output flexibility of the wind power generation collecting system is improved.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a wind power generation collection system with fans connected in parallel and a network.
Background
At present, with the aggravation of the problem of energy shortage, people are urgently required to develop new energy to meet the energy demand of people. The wind power generation has the advantages of being renewable, environment-friendly and the like, and is widely applied, and particularly, offshore wind power is an important field of wind power generation. The wind power generation collection system is a power connection system which collects the electric energy of the wind generating set and transmits the electric energy to a wind power field boosting transformer substation or an electric load. However, the output flexibility of the wind power collection system in the related art is low, and the power demand of the user cannot be met.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above.
Therefore, a first objective of the present invention is to provide a wind power generation collecting system with fans connected in parallel and networked, wherein output ends of a plurality of network-side voltage boosting devices are connected in parallel, the plurality of network-side voltage boosting devices connected in parallel form a fan string, output ends of the plurality of fan strings are connected in series, the plurality of fan strings connected in series form a fan cluster, three fan clusters are connected in star or in delta to form a fan cluster, and an output end of the fan cluster is an output end of the wind power generation collecting system. Therefore, the wind power generation collecting system can combine three-phase alternating current electric energy in a series-parallel connection mode through the output end of the grid side boosting device, and the output flexibility of the wind power generation collecting system is improved.
The embodiment of the first aspect of the invention provides a wind power generation collecting system with fans connected in parallel and networking, which comprises: the system comprises a wind turbine generator, a generator converter and a grid-side boosting device; the wind turbine generator sets, the generator set converters and the grid-side boosting devices have corresponding relations, the output end of each wind turbine generator set is connected with the input end of the corresponding generator set converter, the output end of each generator set converter is connected with the input end of the corresponding grid-side boosting device, the output ends of a plurality of grid-side boosting devices are connected in parallel, the plurality of grid-side boosting devices connected in parallel form a fan string, the output ends of a plurality of fan strings are connected in series, the plurality of fan strings connected in series form a fan cluster, three fan clusters are connected in star or in triangular form to form a fan cluster, and the output end of the fan cluster is the output end of the wind power generation collecting system; the wind power generation set is used for converting wind energy into first alternating current electric energy, the set converter is used for converting the first alternating current electric energy into direct current electric energy, the grid-side boosting device is used for converting the direct current electric energy into second alternating current electric energy, and the voltage level of the second alternating current electric energy is higher than that of the direct current electric energy.
In the wind power generation collecting system of the fan parallel networking of the embodiment of the invention, the output ends of a plurality of network side boosting devices are connected in parallel, the plurality of network side boosting devices connected in parallel form a fan string, the output ends of the plurality of fan strings are connected in series, the plurality of fan strings connected in series form a fan cluster, three fan clusters are connected in a star shape or in a triangular shape to form a fan group, and the output end of the fan group is the output end of the wind power generation collecting system. Therefore, the wind power generation collecting system can combine three-phase alternating current electric energy in a series-parallel connection mode through the output end of the grid side boosting device, and the output flexibility of the wind power generation collecting system is improved.
In addition, the wind power generation collecting system proposed according to the above embodiment of the present invention may also have the following additional technical features:
in one embodiment of the invention, the wind power collection system is arranged on an offshore carrying device, and the output end of the wind power collection system is connected with the input end of the onshore power conversion station.
In one embodiment of the invention, the grid-side boost device comprises a grid-side converter and a grid-side transformer; the output end of each unit converter is connected with the input end of the grid-side converter in the corresponding grid-side voltage boosting device, and the output end of each grid-side converter is connected with the input end of the corresponding grid-side transformer; the grid-side converter is used for converting the direct current electric energy into third alternating current electric energy; and the grid-side transformer is used for converting the third alternating current electric energy into the second alternating current electric energy.
In one embodiment of the invention, the grid-side converter is a single-phase converter.
In one embodiment of the invention, the topology of the grid-side converter is a single-phase multi-level structure.
In one embodiment of the invention, the grid-side transformer is a single-phase transformer.
In one embodiment of the invention, the grid-side transformer is a single-phase isolation transformer.
In one embodiment of the invention, the unit converter is a three-phase converter.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a wind power generation collection system according to one embodiment of the present invention;
FIG. 2 is a schematic connection diagram of a grid-side voltage step-up device of a wind power collection system according to an embodiment of the present invention;
FIG. 3 is a schematic connection diagram of a grid-side voltage step-up device of a wind power collection system according to another embodiment of the present invention;
FIG. 4 is a schematic connection diagram of a grid-side voltage step-up device of a wind power collection system according to another embodiment of the present invention;
FIG. 5 is a schematic view of a wind power generation collection system according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The wind power generation collecting system of the parallel wind turbine networking of the embodiment of the invention is described below with reference to the attached drawings.
FIG. 1 is a schematic view of a wind power generation collection system according to one embodiment of the present invention.
As shown in fig. 1, a wind power generation collecting system 100 according to an embodiment of the present invention includes a wind turbine generator 1, a generator converter 2, and a grid-side voltage boosting device 3.
The wind turbine generator sets 1, the generator set converters 2 and the grid-side boosting devices 3 are in corresponding relation, the output end of each wind turbine generator set 1 is connected with the input end of the corresponding generator set converter 2, and the output end of each generator set converter 2 is connected with the input end of the corresponding grid-side boosting device 3.
As shown in fig. 2, the output ends of the plurality of network-side voltage boosting devices 3 are connected in parallel, the plurality of network-side voltage boosting devices 3 connected in parallel constitute a fan string 4, the output ends of the plurality of fan strings 4 are connected in series, and the plurality of fan strings 4 connected in series constitute a fan cluster 5.
In one embodiment, as shown in fig. 3, three fan clusters 5 are connected in a star to form a fan cluster 6, and the output of the fan cluster 6 is the output of the wind power generation collecting system 100.
In one embodiment, as shown in fig. 4, three fan clusters 5 are triangularly connected to form a fan cluster 6, and the output of the fan cluster 6 is the output of the wind power generation collection system 100.
In the embodiment of the invention, the three fan clusters 5 are respectively an A-phase fan cluster 5, a B-phase fan cluster 5 and a C-phase fan cluster 5, and the output of the fan cluster 6 is three-phase alternating current electric energy.
In the embodiment of the invention, the wind turbine generator 1 is used for converting wind energy into first alternating current electric energy, the generator converter 2 is used for converting the first alternating current electric energy into direct current electric energy, and the grid-side boosting device 3 is used for converting the direct current electric energy into second alternating current electric energy, wherein the voltage level of the second alternating current electric energy is higher than that of the direct current electric energy. It is understood that the grid-side step-up device 3 may step up the dc power output by the unit converter 2 to the second ac power. It should be noted that, the voltage level of the dc power and the voltage level of the second ac power can be set according to actual situations, and are not limited too much here.
In one embodiment, the converter 2 is a three-phase converter, and the converter 2 may convert the three-phase first ac power output by the wind turbine 1 into dc power.
In one embodiment, the output frequency of at least one of the wind turbine generator 1, the turbine converter 2 and the grid-side voltage booster 3 is less than the power frequency. It should be noted that the output frequencies of the wind turbine generator 1, the generator converter 2, and the grid-side voltage boosting device 3 may be set according to actual situations, and are not limited herein. For example, the output frequency may be 50/3Hz (Hertz). Therefore, the output frequency of at least one of the wind turbine generator 1, the generator converter 2 and the grid-side booster device 3 is smaller than the power frequency, the power transmission capacity and the power transmission distance of a power transmission line in the wind power generation collecting system are increased, and the stability and the reliability of the wind power generation collecting system are improved.
In one embodiment, the wind turbine collection system 100 is disposed on an offshore load carrying device, and the output of the wind turbine collection system 100 is connected to the input of the onshore power conversion station 200. It should be noted that the type of the offshore loading device is not limited too much, and for example, steel pipes, steel columns, and the like may be included. For example, as shown in fig. 3 and 4, the output end of the wind power collection system 100 (i.e., the output end of the wind turbine group 6) is connected to the input end of the onshore power conversion station 200. Therefore, the wind power generation collecting system can directly send offshore wind power into the onshore power conversion station without arranging an offshore booster station, and the number of power transmission lines and the cost of the offshore wind power can be greatly reduced.
To sum up, in the wind power generation collecting system of the fan parallel networking of the embodiment of the present invention, the output ends of the plurality of network side voltage boosting devices are connected in parallel, the plurality of network side voltage boosting devices connected in parallel constitute a fan string, the output ends of the plurality of fan strings are connected in series, the plurality of fan strings connected in series constitute a fan cluster, the three fan clusters are connected in star or in delta to constitute a fan group, and the output end of the fan group is the output end of the wind power generation collecting system. Therefore, the wind power generation collecting system can combine three-phase alternating current electric energy in a series-parallel connection mode through the output end of the grid side boosting device, and the output flexibility of the wind power generation collecting system is improved.
On the basis of any of the above embodiments, as shown in fig. 5, the grid-side boosting device 3 includes a grid-side converter 31 and a grid-side transformer 32.
The output of each set converter 2 is connected to the input of the grid-side converter 31 of the corresponding grid-side step-up device 3, and the output of each grid-side converter 31 is connected to the input of the corresponding grid-side transformer 32. The grid-side converter 31 is configured to convert the dc power into a third ac power, and the grid-side transformer 32 is configured to convert the third ac power into a second ac power.
In one embodiment, the voltage level of the second ac power is higher than the voltage level of the third ac power. It is understood that, in this case, the grid-side transformer 32 is a step-up transformer, and the third ac power output by the grid-side converter 31 can be stepped up to the second ac power. It should be noted that the voltage level of the third ac power can be set according to actual situations, and is not limited herein.
In the embodiment of the present invention, the topology structures of the grid-side converter 31 and the grid-side transformer 32 can be set according to the actual situation, which is not limited herein.
In one embodiment, the grid-side converter 31 is a single-phase converter, and the grid-side converter 31 can convert the dc power output by the set converter 2 into a single-phase third ac power. For example, the topology of the grid-side converter 31 is a single-phase multilevel structure. The single-phase multi-level structure includes, but is not limited to, a single-phase three-level structure, a single-phase five-level structure, a single-phase seven-level structure, and the like, which are not limited herein.
In one embodiment, the grid-side transformer 32 is a single-phase transformer, and the grid-side transformer 32 can convert the dc power output by the set converter 2 into a single-phase third ac power. For example, the grid-side transformer is a single-phase isolation transformer.
Therefore, the grid-side boosting device of the wind power generation collecting system comprises a grid-side converter and a grid-side transformer, wherein the grid-side converter can convert direct-current electric energy output by the unit converters into third alternating-current electric energy, the grid-side transformer can convert the third alternating-current electric energy output by the grid-side converter into second alternating-current electric energy, and therefore the grid-side boosting device can convert the direct-current electric energy output by the unit converters corresponding to each wind power unit into the second alternating-current electric energy.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A wind power generation collection system of fan parallel networking, characterized by includes:
the system comprises a wind turbine generator, a generator converter and a grid-side boosting device;
the wind turbine generator sets, the generator set converters and the grid-side boosting devices have corresponding relations, the output end of each wind turbine generator set is connected with the input end of the corresponding generator set converter, the output end of each generator set converter is connected with the input end of the corresponding grid-side boosting device, the output ends of a plurality of grid-side boosting devices are connected in parallel, the plurality of grid-side boosting devices connected in parallel form a fan string, the output ends of a plurality of fan strings are connected in series, the plurality of fan strings connected in series form a fan cluster, three fan clusters are connected in star or in triangular form to form a fan cluster, and the output end of the fan cluster is the output end of the wind power generation collecting system;
the wind power generation set is used for converting wind energy into first alternating current electric energy, the set converter is used for converting the first alternating current electric energy into direct current electric energy, the grid-side boosting device is used for converting the direct current electric energy into second alternating current electric energy, and the voltage level of the second alternating current electric energy is higher than that of the direct current electric energy.
2. The system of claim 1, wherein the wind power collection system is disposed on an offshore carrying device, and wherein an output of the wind power collection system is connected to an input of an onshore power conversion station.
3. The system of claim 1, wherein the grid-side boost device comprises a grid-side converter and a grid-side transformer;
the output end of each unit converter is connected with the input end of the grid-side converter in the corresponding grid-side voltage boosting device, and the output end of each grid-side converter is connected with the input end of the corresponding grid-side transformer;
the grid-side converter is used for converting the direct current electric energy into third alternating current electric energy;
and the grid-side transformer is used for converting the third alternating current electric energy into the second alternating current electric energy.
4. The system of claim 3, wherein the grid-side converter is a single-phase converter.
5. The system of claim 4, wherein the topology of the grid-side converter is a single-phase multilevel structure.
6. The system of claim 3, wherein the grid-side transformer is a single-phase transformer.
7. The system of claim 6, wherein the grid-side transformer is a single-phase isolation transformer.
8. The system according to any one of claims 1-7, wherein the unit converter is a three-phase converter.
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| CN202111362665.3A CN114285068A (en) | 2021-11-17 | 2021-11-17 | Wind power generation collection system with fans connected in parallel and networked |
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| CN202111362665.3A CN114285068A (en) | 2021-11-17 | 2021-11-17 | Wind power generation collection system with fans connected in parallel and networked |
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