CN114123314A - Single wind wheel double-winding motor independent grid-connected system - Google Patents
Single wind wheel double-winding motor independent grid-connected system Download PDFInfo
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- CN114123314A CN114123314A CN202111263691.0A CN202111263691A CN114123314A CN 114123314 A CN114123314 A CN 114123314A CN 202111263691 A CN202111263691 A CN 202111263691A CN 114123314 A CN114123314 A CN 114123314A
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- alternating current
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- current signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
Abstract
The application provides a single wind wheel duplex winding motor independent system that is incorporated into power networks includes: the wind turbine comprises a fan, a first converter, a second converter and a grid-connected transformer, wherein the fan comprises a wind wheel and a motor, and the grid-connected transformer is a double-split transformer; the wind wheel is connected with the motor, and the motor is used for outputting a first alternating current voltage signal U1, a first alternating current signal I1, a second alternating current voltage signal U2 and a second alternating current signal I2 when the wind wheel rotates; the motor is connected with a first input end of the grid-connected transformer through a first converter and is connected with a second input end of the grid-connected transformer through a second converter. The double-winding synchronous generator is adopted, so that the energy density and the generating efficiency of the generator set are improved, and the fault redundancy and the reliability of a system are enhanced; two independent grid-connected converters are adopted to independently control the two output grid-connected loops, decoupling of an electric part and a control part is achieved, system complexity is reduced, and system flexibility and response capability are improved.
Description
Technical Field
The application relates to the technical field of wind power generation, in particular to a single-wind-wheel double-winding motor independent grid-connected system.
Background
In recent years, the annual growth rate of the global renewable energy utilization reaches 25%, the renewable energy utilization is dominated by the power industry, and the power generation proportion of non-hydraulic renewable energy is doubled. Wind power generation is used as renewable energy power generation with the most mature technology except hydroelectric power generation, the installed capacity of the wind power generation accounts for the vast majority of the installed total capacity of the whole renewable energy power generation, but the limit of the performance of power electronic devices causes certain bottleneck for the development and application of large-capacity wind turbine generators, and how to reasonably construct a grid-connected system becomes a problem to be solved urgently in the industry.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first purpose of the present application is to provide a single-wind-wheel double-winding motor independent grid-connected system, so as to improve the energy density and the power generation efficiency of a unit, reduce the complexity of the system, improve the flexibility and the response capability of the system, and enhance the redundancy and the reliability of system faults.
In order to achieve the above object, an embodiment of a first aspect of the present application provides an independent grid-connected system for a single-wind-wheel dual-winding motor, including: the wind turbine comprises a fan, a first converter, a second converter and a grid-connected transformer, wherein the fan comprises a wind wheel and a motor, and the grid-connected transformer is a double-split transformer; the wind wheel is connected with the motor, and the motor is used for outputting a first alternating current voltage signal U1, a first alternating current signal I1, a second alternating current voltage signal U2 and a second alternating current signal I2 when the wind wheel rotates; the motor is connected with a first input end of the grid-connected transformer through the first converter, the first converter is used for generating a third alternating current voltage signal U3 according to the first alternating current voltage signal U1 and generating a third alternating current signal I3 according to the first alternating current signal I1, and the third alternating current voltage signal U3 and the third alternating current signal I3 are input to the first input end of the grid-connected transformer; the motor is connected with the second input end of the grid-connected transformer through the second converter, and the second converter is used for generating a fourth alternating current voltage signal U4 according to the second alternating current voltage signal U2, generating a fourth alternating current signal I4 according to the second alternating current signal I2, and inputting the fourth alternating current voltage signal U4 and the fourth alternating current signal I4 to the second input end of the grid-connected transformer.
The single-wind-wheel double-winding motor independent grid-connected system provided by the embodiment of the application, the wind wheel is connected with a motor, the motor is used for outputting a first alternating current voltage signal U1, a first alternating current signal I1, a second alternating current signal U2 and a second alternating current signal I2 when the wind wheel rotates, the motor is connected with a first input end of a grid-connected transformer through a first converter, the first converter is used for generating a third alternating current signal U3 according to the first alternating current signal U1 and generating a third alternating current signal I3 according to the first alternating current signal I1, the third alternating current signal U3 and a third alternating current signal I3 are input to the first input end of the grid-connected transformer, the motor is connected with a second input end of the grid-connected transformer through a second converter, the second converter is used for generating a fourth alternating current signal U4 according to the second alternating current signal U2 and generating a fourth alternating current signal I4 according to the second alternating current signal I2, and the fourth alternating voltage signal U4 and the fourth alternating current signal I4 are input to the second input terminal of the grid-connected transformer. According to the single-wind-wheel double-winding motor independent grid-connected system provided by the embodiment of the application, the unit adopts one wind wheel to drive one generator, and the generator is separately connected to the grid through two sets of grid-connected converters; two independent grid-connected converters are adopted to independently control the two output grid-connected loops, decoupling of an electric part and a control part is achieved, system complexity is reduced, and system flexibility and response capability are improved.
According to one embodiment of the application, the electric machine is a permanent magnet synchronous generator.
According to one embodiment of the application, the electric machine is a double winding single rotor electric machine.
According to an embodiment of the application, the first converter is a full power converter.
According to an embodiment of the application, the second converter is a full power converter.
According to an embodiment of the application, the first converter comprises a first rectifier and a first inverter.
According to an embodiment of the application, the second converter comprises a second rectifier and a second inverter.
According to one embodiment of the application, the rotor is a three-bladed rotor.
Additional aspects and advantages of the present application 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 present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application 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 structural diagram of a single-wind-wheel double-winding motor independent grid-connected system according to an embodiment of the application;
fig. 2 is a block diagram of a first converter of a single wind wheel double winding motor independent grid-connected system according to an embodiment of the application;
fig. 3 is a block diagram of a second converter of a single-wind-wheel double-winding motor independent grid-connected system according to an embodiment of the application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, 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 exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The independent grid-connected system of the single-wind-wheel double-winding motor of the embodiment of the application is described below with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a single-wind-wheel double-winding motor independent grid-connected system according to an embodiment of the present application, and as shown in fig. 1, the single-wind-wheel double-winding motor independent grid-connected system according to the embodiment of the present application may specifically include: fan 101, first converter 102, second converter 103 and grid-connected transformer 104, wherein:
The wind wheel 1011 is connected with the motor 1012 (specifically, the wind wheel 1011 may be connected with a rotor of the motor 1012), the wind wheel 1011 rotates under the action of wind to drive the rotor of the motor 1012 to rotate, and the motor 1012 is used for outputting a first alternating current signal U1 and a first alternating current signal I1 at the first stator winding when the wind wheel 1011 drives the rotor of the motor 1012 to rotate; a second ac voltage signal U2 and a second ac current signal I2 are output at the second stator winding. Wherein, the motor 1012 can be a permanent magnet synchronous generator, and the wind wheel 1011 can be a three-blade wind wheel.
The motor 1012 (specifically, the first stator winding of the motor 1012) is connected to the grid-connected transformer 104 through the first converter 102, specifically, the motor 1012 (specifically, the first stator winding of the motor 1012) is connected to an input terminal of the first converter 102 through a three-phase line, an output terminal of the first converter 102 is connected to a first input terminal of the grid-connected transformer 104 through a three-phase line, the first converter 102 is configured to generate a third ac voltage signal U3 according to the first ac voltage signal U1 and generate a third ac current signal I3 according to the first ac current signal I1, and the first converter 102 inputs the third ac voltage signal U3 and the third ac current signal I3 to the first input terminal of the grid-connected transformer 104. As shown in fig. 2, the first converter 102 may specifically include at least one first rectifier 201 and at least one first inverterAnd (2) a device 202. The first converter 102 may be a full power converter, and the conversion efficiency of the first converter 102 is η1The output power is P1, and when the rotor of the double-winding single-rotor motor is driven by the wind wheel to rotate according to the first ac voltage signal U1 and the first ac current signal I1, the output power P1 of the first converter is obtained through calculation, and the calculation formula is as follows:
the motor 1012 (specifically, the second stator winding of the motor 1012) is connected to the grid-connected transformer 104 through the second converter 103, specifically, the motor 1012 (specifically, the second stator winding of the motor 1012) is connected to the input terminal of the second converter 103 through a three-phase line, the output terminal of the second converter 103 is connected to the second input terminal of the grid-connected transformer 104 through a three-phase line, the second converter 103 is configured to generate a fourth ac voltage signal U4 according to the second ac voltage signal U2 and generate a fourth ac current signal I4 according to the second ac current signal I2, and the second converter 103 inputs the fourth ac voltage signal U4 and the fourth ac current signal I4 to the second input terminal of the grid-connected transformer 104. As shown in fig. 3, the second converter 103 may specifically comprise at least one second rectifier 301 and at least one second inverter 302. The second converter 103 may be a full power converter, and the conversion efficiency of the second converter 103 is η2The output power is P2, and when the rotor of the double-winding single-rotor motor is driven by the wind wheel to rotate according to the second alternating voltage signal U2 and the second alternating current signal I2, the output power P2 of the second converter is obtained through calculation, and the calculation formula is as follows:
the grid-connected transformer 104 may be a double split transformer, and includes a first input terminal, a second input terminal, and an output terminal. The grid-connected transformer 104 is connected to the first converter 102 via a first input terminal, and the grid-connected transformer 104 is connected to the first converter 102 via a second input terminalThe two inputs are connected to a second converter 103. The system efficiency of the grid-connected transformer 104 is η3The total grid-connected power of the unit is P3, and as a feasible implementation manner, the total grid-connected power of the unit P3 can be obtained by calculation according to an alternating voltage signal and an alternating current signal generated by the single-wind-wheel double-winding motor unit provided by the application, and the calculation formula is as follows:
the single-wind-wheel double-winding motor independent grid-connected system provided by the embodiment of the application, the wind wheel is connected with a motor, the motor is used for outputting a first alternating current voltage signal U1, a first alternating current signal I1, a second alternating current signal U2 and a second alternating current signal I2 when the wind wheel rotates, the motor is connected with a first input end of a grid-connected transformer through a first converter, the first converter is used for generating a third alternating current signal U3 according to the first alternating current signal U1 and generating a third alternating current signal I3 according to the first alternating current signal I1, the third alternating current signal U3 and a third alternating current signal I3 are input to the first input end of the grid-connected transformer, the motor is connected with a second input end of the grid-connected transformer through a second converter, the second converter is used for generating a fourth alternating current signal U4 according to the second alternating current signal U2 and generating a fourth alternating current signal I4 according to the second alternating current signal I2, and the fourth alternating voltage signal U4 and the fourth alternating current signal I4 are input to the second input terminal of the grid-connected transformer. According to the single-wind-wheel double-winding motor independent grid-connected system provided by the embodiment of the application, the unit adopts a three-blade wind wheel to drive a double-winding single-rotor permanent magnet synchronous generator which is separately connected to the grid through two sets of grid-connected converters, and the double-winding synchronous generator is adopted, so that the energy density and the power generation efficiency of the unit are improved, and the fault redundancy and the reliability of the system are enhanced; two independent grid-connected converters are adopted to independently control the two output grid-connected loops, decoupling of an electric part and a control part is achieved, system complexity is reduced, and system flexibility and response capability are improved.
In the description of the present application, it is to be understood that the terms "center," "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 present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
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 application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, 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 intervening media. 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, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 application. 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 application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (8)
1. The utility model provides an independent system that is incorporated into power networks of single wind wheel duplex winding motor which characterized in that includes: the wind turbine comprises a fan, a first converter, a second converter and a grid-connected transformer, wherein the fan comprises a wind wheel and a motor, and the grid-connected transformer is a double-split transformer;
the wind wheel is connected with the motor, and the motor is used for outputting a first alternating current signal U1, a first alternating current signal I1, a second alternating current signal U2 and a second alternating current signal I2 when the wind wheel rotates;
the motor is connected with a first input end of the grid-connected transformer through the first converter, the first converter is used for generating a third alternating current voltage signal U3 according to the first alternating current voltage signal U1 and generating a third alternating current signal I3 according to the first alternating current signal I1, and the third alternating current voltage signal U3 and the third alternating current signal I3 are input to the first input end of the grid-connected transformer;
the motor is connected with the second input end of the grid-connected transformer through the second converter, and the second converter is used for generating a fourth alternating current voltage signal U4 according to the second alternating current voltage signal U2, generating a fourth alternating current signal I4 according to the second alternating current signal I2, and inputting the fourth alternating current voltage signal U4 and the fourth alternating current signal I4 to the second input end of the grid-connected transformer.
2. The single-wind-wheel double-winding motor independent grid-connected system according to claim 1, wherein the motor is a permanent magnet synchronous generator.
3. The single-wind-wheel double-winding motor independent grid-connected system according to claim 1, wherein the motor is a double-winding single-rotor motor.
4. The single-wind-wheel double-winding motor independent grid-connected system according to claim 1, wherein the first converter is a full-power converter.
5. The single-wind-wheel double-winding motor independent grid-connected system according to claim 1, wherein the second converter is a full-power converter.
6. The single wind wheel dual winding electric machine independent grid connection system according to claim 1, characterized in that the first converter comprises a first rectifier and a first inverter.
7. The single wind wheel dual winding electric machine independent grid connection system according to claim 1, characterized in that the second converter comprises a second rectifier and a second inverter.
8. The single-wind-wheel double-winding motor independent grid-connected system according to claim 1, wherein the wind wheel is a three-blade wind wheel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111263691.0A CN114123314A (en) | 2021-10-26 | 2021-10-26 | Single wind wheel double-winding motor independent grid-connected system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111263691.0A CN114123314A (en) | 2021-10-26 | 2021-10-26 | Single wind wheel double-winding motor independent grid-connected system |
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| CN202111263691.0A Pending CN114123314A (en) | 2021-10-26 | 2021-10-26 | Single wind wheel double-winding motor independent grid-connected system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280838A (en) * | 2013-05-29 | 2013-09-04 | 浙江大学 | Wind power generation high-voltage direct current grid-connected system based on open coil structure and control method thereof |
| CN104079184A (en) * | 2014-06-23 | 2014-10-01 | 周细文 | Wind power converter based on bipolar direct-current structure |
| CN104242345A (en) * | 2014-09-22 | 2014-12-24 | 周细文 | High-power direct drive wind power converter circuit topological structure and application thereof |
| CN111431204A (en) * | 2019-01-10 | 2020-07-17 | 北京Abb电气传动系统有限公司 | Wind power generation plant |
-
2021
- 2021-10-26 CN CN202111263691.0A patent/CN114123314A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280838A (en) * | 2013-05-29 | 2013-09-04 | 浙江大学 | Wind power generation high-voltage direct current grid-connected system based on open coil structure and control method thereof |
| CN104079184A (en) * | 2014-06-23 | 2014-10-01 | 周细文 | Wind power converter based on bipolar direct-current structure |
| CN104242345A (en) * | 2014-09-22 | 2014-12-24 | 周细文 | High-power direct drive wind power converter circuit topological structure and application thereof |
| CN111431204A (en) * | 2019-01-10 | 2020-07-17 | 北京Abb电气传动系统有限公司 | Wind power generation plant |
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