CN113541182A - Double-fed wind turbine generator system generating circuit and double-fed wind turbine generator system - Google Patents
Double-fed wind turbine generator system generating circuit and double-fed wind turbine generator system Download PDFInfo
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- CN113541182A CN113541182A CN202110654132.6A CN202110654132A CN113541182A CN 113541182 A CN113541182 A CN 113541182A CN 202110654132 A CN202110654132 A CN 202110654132A CN 113541182 A CN113541182 A CN 113541182A
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- 238000004804 winding Methods 0.000 claims abstract description 56
- 238000010248 power generation Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 17
- 238000001816 cooling Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- 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
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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
Abstract
The invention discloses a double-fed wind turbine generator generating circuit, which comprises an on-line transformer, a converter and a double-fed generator which are electrically connected in sequence, wherein the converter comprises n converter loops, the double-fed generator comprises a stator winding and n rotor windings, the stator winding is electrically connected with the on-line transformer to form a branch, and each rotor winding is electrically connected with the on-line transformer through a converter loop to form a branch; wherein n is more than or equal to 2 and n is a positive integer. The invention solves the problems of difficult design, low reliability and stability, high cost and the like of the high-capacity double-fed unit converter in the prior art.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a double-fed wind turbine generator generating circuit and a double-fed wind turbine generator.
Background
Under the condition that wind power is continuously reduced at present, a double-fed technology is probably a main technology in a period of time in the future. A main method for reducing cost is to develop a large-capacity unit, the double-fed unit is generally a 4-5MW unit at present, the converter adopts air cooling, and if a larger-capacity (8-10MW or larger) unit needs to be designed, the converter needs to be redesigned, and at the moment, water cooling is needed. However, the reliability, stability and economy of water cooling are not good, such as water leakage and other problems are easy to occur, the power module of the high-power converter is difficult to design, different capacity structures are different, interfaces need to be adjusted continuously in the unit design process, the design is troublesome, and the design efficiency is low. The design problem of converter has been solved in this application, adopts the converter to carry out the parallel connection design, and the realization that can be very convenient is more big capacity double-fed unit design.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a double-fed wind turbine generator generating circuit and a double-fed wind turbine generator, and solves the problems of difficult design, low reliability and stability, high cost and the like of a high-power converter power module in the prior art.
The technical scheme adopted by the invention for solving the problems is as follows:
a double-fed wind turbine generator generating circuit comprises an on-line transformer, a converter and a double-fed generator which are electrically connected in sequence, wherein the converter comprises n converter loops, the double-fed generator comprises a stator winding and n rotor windings, the stator winding is electrically connected with the on-line transformer to form a branch, and each rotor winding is electrically connected with the on-line transformer through the converter loop to form a branch; wherein n is more than or equal to 2 and n is a positive integer.
The invention adopts a mode of connecting n converter loops in parallel, can realize redundancy control, can cut off a fault circuit when a certain converter loop is damaged, reduces the quota of a unit to continue generating power, and improves the availability of the unit. The invention is convenient to adopt air cooling, has good reliability, stability and economy compared with water cooling, and avoids the problems of water leakage and the like; the structure of the invention is convenient for layout and installation, is beneficial to the modular design of the converter, improves the development progress and reliability of the unit and reduces the cost of the fan; for the units with different capacities, the design can be adapted only by adjusting the loop parameters or the number and the like of the current transformer, the design convenience is greatly improved, and the rapid research and development of the units are facilitated.
As a preferred technical solution, the converter further includes a stator circuit switch, and the stator winding is electrically connected to the on-grid transformer through the stator circuit switch to form a branch.
The stator circuit switch is favorable for cutting off a branch formed by electrically connecting the stator winding and the network transformer, thereby being convenient for ensuring the circuit safety and being convenient for debugging and maintenance.
As a preferred technical scheme, the converter further comprises a grid-connected circuit breaker, and the stator winding is electrically connected with the grid-connected transformer through a stator circuit switch and the grid-connected circuit breaker in sequence to form a branch.
The grid-connected circuit breaker is convenient for cutting off a branch formed by electrically connecting the stator winding with the on-line transformer through the stator circuit switch and the grid-connected circuit breaker in sequence, so that the circuit safety is further ensured, and the debugging and the maintenance are convenient.
As a preferred technical scheme, the converter further comprises n first switches, and each rotor winding is electrically connected with the on-line transformer through the first switches, the converter loop and the grid-connected circuit breaker in sequence to form a branch.
The first switch facilitates breaking the electrical connection of the converter to the rotor winding.
As a preferred technical scheme, the converter further comprises n second switches, and each rotor winding is electrically connected with the on-line transformer through the first switch, the converter loop, the second switch and the grid-connected circuit breaker in sequence to form a branch.
The second switch is convenient for cutting off the electric connection between the network transformer and the network transformer.
As a preferred technical solution, the power converter further comprises a first cable, and the stator winding is electrically connected with the power converter through the first cable.
This facilitates the electrical connection of the stator winding to the current transformer.
As a preferred technical solution, the device further comprises a second cable, and the rotor winding is electrically connected with the converter through the second cable.
This facilitates the electrical connection of the rotor winding to the converter.
A double-fed wind turbine generator comprises the double-fed wind turbine generator generating circuit.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts a mode of connecting n converter loops in parallel, can realize redundancy control, can cut off a fault circuit when a certain converter loop is damaged, reduces the quota of a unit to continue generating power, and improves the availability of the unit. The invention is convenient to adopt air cooling, has good reliability, stability and economy compared with water cooling, and avoids the problems of water leakage and the like; the structure of the invention is convenient for layout and installation, is beneficial to the modular design of the converter, improves the development progress and reliability of the unit and reduces the cost of the fan; for the units with different capacities, the design can be adapted only by adjusting the parameters or the number of the converter loops, so that the design convenience is greatly improved, and the rapid research and development of the units are facilitated;
(2) the stator circuit switch is beneficial to cutting off a branch formed by electrically connecting the stator winding and the network transformer, thereby being convenient for ensuring the circuit safety and debugging and maintenance;
(3) the grid-connected circuit breaker is convenient for cutting off a branch formed by electrically connecting the stator winding with the on-line transformer through the stator circuit switch and the grid-connected circuit breaker in sequence, so that the circuit safety is further ensured, and the debugging and the maintenance are convenient;
(4) according to the invention, the first switch is convenient for cutting off the electric connection between the converter and the rotor winding, and the second switch is convenient for cutting off the electric connection between the on-line transformer and the on-line transformer;
(5) the invention is convenient for realizing the electric connection between the stator winding and the converter and the electric connection between the rotor winding and the converter.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is one of the schematic structural diagrams of the doubly-fed wind turbine generator generating circuit of the present invention;
fig. 3 is a second schematic structural diagram of the doubly-fed wind turbine generator generating circuit according to the present invention.
Reference numbers and corresponding part names in the drawings: 1. the system comprises an upper network transformer, 2, a converter, 3, a doubly-fed generator, 201, a grid-connected circuit breaker, 203, a first switch, 204, a first converter loop, 205, a second converter loop, 206, a first grid-side switch, 207, a second grid-side switch, 208, a first machine-side switch, 209, a second machine-side switch, 301, a stator winding, 302, a first rotor winding, 303, a second rotor winding, 401, a stator cable, 402, a first rotor cable, 403 and a second rotor cable.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
As shown in fig. 1 to fig. 3, a double-fed wind turbine generator generating circuit includes an on-grid transformer 1, a converter 2, and a double-fed generator 3 electrically connected in sequence, where the converter 2 includes n converter circuits, the double-fed generator 3 includes a stator winding 301 and n rotor windings, the stator winding 301 is electrically connected to the on-grid transformer 1 to form a branch, and each rotor winding is electrically connected to the on-grid transformer 1 through the converter circuit to form a branch; wherein n is more than or equal to 2 and n is a positive integer.
The invention adopts a mode of connecting n converter loops in parallel, can realize redundancy control, can cut off a fault circuit when a certain converter loop is damaged, reduces the quota of a unit to continue generating power, and improves the availability of the unit. The invention is convenient to adopt air cooling, has good reliability, stability and economy compared with water cooling, and avoids the problems of water leakage and the like; the structure of the invention is convenient for layout and installation, is beneficial to the modular design of the converter 2, improves the development progress and reliability of a unit, and reduces the cost of a fan; for the units with different capacities, the design can be adapted only by adjusting the loop parameters or the number and the like of the current transformer, the design convenience is greatly improved, and the rapid research and development of the units are facilitated.
Preferably, the stator winding 301 and the converter circuit are connected to the low-voltage side of the upper network transformer 1.
As a preferred technical solution, the converter 2 further includes a stator circuit switch 203, and the stator winding 301 is electrically connected to the upper network transformer 1 through the stator circuit switch 203 to form a branch.
The stator circuit switch 203 is beneficial to cutting off a branch formed by electrically connecting the stator winding 301 and the network transformer 1, thereby being convenient for ensuring the circuit safety and being convenient for debugging and maintenance.
As a preferred technical solution, the converter 2 further includes a grid-connected circuit breaker 201, and the stator winding 301 is electrically connected to the on-line transformer 1 through the stator circuit switch 203 and the grid-connected circuit breaker 201 in sequence to form a branch.
The grid-connected circuit breaker 201 is convenient for cutting off a branch formed by electrically connecting the stator winding 301 with the on-line transformer 1 sequentially through the stator circuit switch 203 and the grid-connected circuit breaker 201, so that the circuit safety is further ensured, and the debugging and the maintenance are convenient.
As a preferred technical solution, the converter 2 further includes n first switches, and each rotor winding is electrically connected to the on-grid transformer 1 through the first switch, the converter circuit, and the grid-connected circuit breaker 201 in sequence to form a branch.
The first switch facilitates breaking the electrical connection of the converter 2 to the rotor winding.
As a preferred technical solution, the converter 2 further includes n second switches, and each rotor winding is electrically connected to the on-grid transformer 1 through the first switch, the converter loop, the second switch, and the grid-connected circuit breaker 201 in sequence to form a branch.
The second switch facilitates the disconnection of the on-grid transformer 1 from the on-grid transformer 1.
As a preferred technical solution, the power converter further comprises a first cable, and the stator winding 301 is electrically connected with the current transformer 2 through the first cable.
This facilitates the electrical connection of the stator winding 301 to the current transformer 2.
As a preferred solution, the converter further comprises a second cable, and the rotor winding is electrically connected to the converter 2 via the second cable.
This facilitates the electrical connection of the rotor winding to the converter 2.
The first cable and the second cable can be preferably wrapped with insulating layers, so that the reliability is further improved.
Example 2
As shown in fig. 1 to fig. 3, a doubly-fed wind turbine generator includes the doubly-fed wind turbine generator circuit.
Example 3
On the basis of embodiments 1 and 2, this embodiment provides a more specific embodiment.
In fig. 2 and 3, the rotor winding includes a first rotor winding 302 and a second rotor winding 303, the converter loop includes a first converter loop 204 and a second converter loop 205, the first switch includes a first machine-side switch 208 and a second machine-side switch 209, the second switch includes a first net-side switch 206 and a second net-side switch 207, the first cable is a stator cable 401, and the second cable includes a first rotor cable 402 and a second rotor cable 403.
The first machine side switch 208, the second machine side switch 209, the first grid side switch 206, the second grid side switch 207 provide redundant operation functions for the circuit (as shown in fig. 2). If the redundant function is not needed, the first machine-side switch 208, the second machine-side switch 209, the first network-side switch 206, and the second network-side switch 207 may be eliminated (as shown in fig. 3).
As described above, the present invention can be preferably realized.
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (8)
1. The double-fed wind turbine generator generating circuit is characterized by comprising an on-grid transformer (1), a converter (2) and a double-fed generator (3) which are electrically connected in sequence, wherein the converter (2) comprises n converter loops, the double-fed generator (3) comprises a stator winding (301) and n rotor windings, the stator winding (301) is electrically connected with the on-grid transformer (1) to form a branch, and each rotor winding is electrically connected with the on-grid transformer (1) through the converter loop to form a branch; wherein n is more than or equal to 2 and n is a positive integer.
2. The doubly-fed wind turbine generator system power generation circuit as claimed in claim 1, wherein said converter (2) further comprises a stator circuit switch (203), and said stator winding (301) is electrically connected to said on-grid transformer (1) through said stator circuit switch (203) to form a branch.
3. The doubly-fed wind turbine generator system power generation circuit of claim 2, wherein the converter (2) further comprises a grid-connected circuit breaker (201), and the stator winding (301) is electrically connected with the grid-connected transformer (1) through a stator circuit switch (203) and the grid-connected circuit breaker (201) in sequence to form a branch.
4. A doubly-fed wind turbine generator system power generation circuit according to any one of claims 1 to 3, wherein said converter (2) further comprises n first switches, and each rotor winding is electrically connected to said on-grid transformer (1) through said first switches, a converter circuit, and a grid-connected breaker (201) in sequence to form a branch.
5. The doubly-fed wind turbine generator system power generation circuit of claim 4, wherein the converter (2) further comprises n second switches, and each rotor winding is electrically connected with the grid transformer (1) through the first switch, the converter loop, the second switch and the grid-connected circuit breaker (201) in sequence to form a branch.
6. A doubly-fed wind turbine generator circuit according to claim 5, further comprising a first cable, wherein the stator winding (301) is electrically connected to the converter (2) via the first cable.
7. A doubly-fed wind turbine generator circuit according to claim 6, further comprising a second cable, wherein the rotor winding is electrically connected to the converter (2) via the second cable.
8. A doubly-fed wind turbine generator, characterized in that it comprises a doubly-fed wind turbine generator circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110654132.6A CN113541182A (en) | 2021-06-11 | 2021-06-11 | Double-fed wind turbine generator system generating circuit and double-fed wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110654132.6A CN113541182A (en) | 2021-06-11 | 2021-06-11 | Double-fed wind turbine generator system generating circuit and double-fed wind turbine generator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113541182A true CN113541182A (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110654132.6A Pending CN113541182A (en) | 2021-06-11 | 2021-06-11 | Double-fed wind turbine generator system generating circuit and double-fed wind turbine generator system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203747432U (en) * | 2013-12-26 | 2014-07-30 | 贵阳供电局 | Wind power generation system |
| CN107681828A (en) * | 2017-10-25 | 2018-02-09 | 河北工业大学 | A kind of double rotor speed regulating wind generator system and its control method |
| CN108631356A (en) * | 2017-12-26 | 2018-10-09 | 北京金风科创风电设备有限公司 | Converter for wind power plant power transmission system and wind power plant power transmission system |
| CN110971095A (en) * | 2019-12-12 | 2020-04-07 | 齐鲁工业大学 | Double-stator wind driven generator and power generation system |
| WO2020079059A1 (en) * | 2018-10-17 | 2020-04-23 | Senvion Gmbh | Method for operating a wind turbine in the event of a fault |
| CN112909989A (en) * | 2019-12-04 | 2021-06-04 | 中车株洲电力机车研究所有限公司 | Medium-voltage double-fed wind turbine generator and control method thereof |
-
2021
- 2021-06-11 CN CN202110654132.6A patent/CN113541182A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203747432U (en) * | 2013-12-26 | 2014-07-30 | 贵阳供电局 | Wind power generation system |
| CN107681828A (en) * | 2017-10-25 | 2018-02-09 | 河北工业大学 | A kind of double rotor speed regulating wind generator system and its control method |
| CN108631356A (en) * | 2017-12-26 | 2018-10-09 | 北京金风科创风电设备有限公司 | Converter for wind power plant power transmission system and wind power plant power transmission system |
| WO2020079059A1 (en) * | 2018-10-17 | 2020-04-23 | Senvion Gmbh | Method for operating a wind turbine in the event of a fault |
| CN112909989A (en) * | 2019-12-04 | 2021-06-04 | 中车株洲电力机车研究所有限公司 | Medium-voltage double-fed wind turbine generator and control method thereof |
| CN110971095A (en) * | 2019-12-12 | 2020-04-07 | 齐鲁工业大学 | Double-stator wind driven generator and power generation system |
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Address after: 618099 No.99, Zhujiang East Road, Jingyang District, Deyang City, Sichuan Province Applicant after: Dongfang Electric Wind Power Co.,Ltd. Address before: 618099 No.99, Zhujiang East Road, Jingyang District, Deyang City, Sichuan Province Applicant before: DONGFANG ELECTRIC WIND POWER Co.,Ltd. |
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