CN201528280U - Full power direct-drive type flexible grid-connection current transformer for wind turbine - Google Patents
Full power direct-drive type flexible grid-connection current transformer for wind turbine Download PDFInfo
- Publication number
- CN201528280U CN201528280U CN2009202343617U CN200920234361U CN201528280U CN 201528280 U CN201528280 U CN 201528280U CN 2009202343617 U CN2009202343617 U CN 2009202343617U CN 200920234361 U CN200920234361 U CN 200920234361U CN 201528280 U CN201528280 U CN 201528280U
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- grid
- unit
- flexible grid
- current transformer
- power direct
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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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- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a full power direct-drive type flexible grid-connection current transformer for a wind turbine, which is formed by sequentially connecting a choking device, a rectifier, a supporting unit, an inverter and a grid-side filtering unit, wherein the input terminal of the choking device is connected with the output terminal of a generator, the output terminal of the grid-side filtering unit is connected with the input terminal of a power grid. The utility model improves the service condition of an AC side reactor, and greatly reduces the manufacturing difficulty and cost.
Description
Technical field
Utility model relates to the flexible grid-connected converter of a kind of total power direct drive wind power unit, belongs to the technical field of current transformer.
Background technology
The flexible grid-connected converter of total power direct drive wind power unit comprise rectification unit, PWM inversion unit, etc. formant.
Rectification unit is uncontrollable rectifier, and the generating pusher side does not have filtering and chokes unit, the difficult containment of harmonic wave.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of total power direct drive wind power unit flexible grid-connected converter at the defective that prior art exists.
The utility model adopts following technical scheme for achieving the above object:
The flexible grid-connected converter of the utility model total power direct drive wind power unit, it is characterized in that being connected in series rectifier, support unit, inverter and net side filter unit successively by choke forms, the output of the input sending and receiving motor of choke wherein, the input that the output of net side filter unit gets access to grid.
The flexible grid-connected converter of total power direct drive wind power unit, it is characterized in that comprising two groups of current transformers that structure is identical, each group current transformer all is connected in series rectifier, support unit, inverter and net side filter unit successively by choke and forms, the output of the input sending and receiving motor of choke wherein, the input that the output of net side filter unit gets access to grid.
The utility model adopts the Three-phase PWM Voltage Rectifier replacement not control rectification and boost chopper unit, and energy storage inductor is located at AC side, and by the torque of active power control generator loading, thereby realization is to the adjusting of motor speed.The AC side reactor condition of work that is used for energy storage is improved, and manufacture difficulty and cost all descend significantly.
Description of drawings
Fig. 1 is a structure chart of the present invention;
Fig. 2 implements figure for the present invention is another kind of.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to utility model:
As shown in Figure 1, adopt Three-phase PWM Voltage Rectifier to replace and do not control rectification and boost chopper unit, energy storage inductor is located at AC side, and by the torque of active power control generator loading, thereby realization is to the adjusting of motor speed.
PWM rectification topology as shown in Figure 1 can realize the high performance control to generator, avoided not controlling the complexity that rectification and DC boosting copped wave two-layer configuration increase to system, the AC side reactor condition of work that is used for energy storage is simultaneously improved, manufacture difficulty and cost all descend significantly, the dynamo current harmonic content is less relatively favourable to the permanent magnet generator life-span, the power device of its use is more, and control is complicated.
Consideration is to the generator control performance, and the consistency of cabinet body structure, adopts two back-to-back PWM converter structures (Fig. 2), forms the current transformer of double capacity by the equal direct parallel running of current transformer of two capacity.
Two covers are independent fully with the current transformer of capacity, synchronous operation, and two covering devices comprise that main circuit and control circuit are independent operating, and control can principal and subordinate's control, again can be attached one go up and adopt high-speed CAN bus to carry out communication between the level controller.
The be incorporated into the power networks overall electrical structure of frequency converter of total power direct drive wind power unit flexibility is described below.Adopt the structure of the independent stator winding of two covers.Two cover windings connect the independently two PWM current transformers of two covers respectively, and the structure of two cover current transformers is just the same, and synchronous operation is parallel to the 690V low voltage electric network, then by main transformer, with the power delivery of wind-powered electricity generation unit to the 10kV electrical network.Every cover current transformer all is made of a PWM rectifier and PWM inverter, also is parallel with charging paths and brake unit in addition on the dc bus.
The structure of PWM rectification unit and PWM inversion unit is just the same, and just the flow of power direction is opposite.The input side of rectifier and the outlet side of inverter all have LC and LCL filter circuit.
Brake unit is made of an independent brachium pontis and Crowbar resistance, and Crowbar resistance connects the mid point of direct current positive bus and brachium pontis; Charging paths is made of a low capacity diode rectifier bridge and current-limiting resistance; In addition, also connect the transformer of 690V/220V on the 690V bus, be the control system power supply.
Claims (4)
1. the flexible grid-connected converter of a total power direct drive wind power unit, it is characterized in that being connected in series rectifier, support unit, inverter and net side filter unit successively by choke forms, the output of the input sending and receiving motor of choke wherein, the input that the output of net side filter unit gets access to grid.
2. the flexible grid-connected converter of a total power direct drive wind power unit, it is characterized in that comprising two groups of current transformers that structure is identical, each group current transformer all is connected in series rectifier, support unit, inverter and net side filter unit successively by choke and forms, the output of the input sending and receiving motor of choke wherein, the input that the output of net side filter unit gets access to grid.
3. the flexible grid-connected converter of total power direct drive wind power unit according to claim 1 and 2 is characterized in that described rectifier is the PWM rectifier.
4. the flexible grid-connected converter of total power direct drive wind power unit according to claim 1 and 2 is characterized in that described net side filter unit is the LCL filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202343617U CN201528280U (en) | 2009-07-27 | 2009-07-27 | Full power direct-drive type flexible grid-connection current transformer for wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202343617U CN201528280U (en) | 2009-07-27 | 2009-07-27 | Full power direct-drive type flexible grid-connection current transformer for wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201528280U true CN201528280U (en) | 2010-07-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202343617U Expired - Fee Related CN201528280U (en) | 2009-07-27 | 2009-07-27 | Full power direct-drive type flexible grid-connection current transformer for wind turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201528280U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306938A (en) * | 2011-09-09 | 2012-01-04 | 北京索英电气技术有限公司 | Starting method for current transformer |
| CN102928777A (en) * | 2012-10-19 | 2013-02-13 | 株洲变流技术国家工程研究中心有限公司 | System and method for load test of diesel generating set |
| CN103312184A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Power circuit, current transformer structure and wind generator system comprising both |
| CN104242345A (en) * | 2014-09-22 | 2014-12-24 | 周细文 | High-power direct drive wind power converter circuit topological structure and application thereof |
| CN108880278A (en) * | 2018-08-01 | 2018-11-23 | 山东欧瑞安电气有限公司 | A kind of 1140V permanent magnet direct-driven variable-frequency motor all-in-one machine major loop structure |
-
2009
- 2009-07-27 CN CN2009202343617U patent/CN201528280U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306938A (en) * | 2011-09-09 | 2012-01-04 | 北京索英电气技术有限公司 | Starting method for current transformer |
| CN102306938B (en) * | 2011-09-09 | 2014-05-14 | 北京索英电气技术有限公司 | Starting method for current transformer |
| CN103312184A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Power circuit, current transformer structure and wind generator system comprising both |
| CN103312184B (en) * | 2012-03-09 | 2015-09-16 | 台达电子工业股份有限公司 | A kind of power circuit, converter structure and wind generator system thereof |
| CN102928777A (en) * | 2012-10-19 | 2013-02-13 | 株洲变流技术国家工程研究中心有限公司 | System and method for load test of diesel generating set |
| CN104242345A (en) * | 2014-09-22 | 2014-12-24 | 周细文 | High-power direct drive wind power converter circuit topological structure and application thereof |
| CN108880278A (en) * | 2018-08-01 | 2018-11-23 | 山东欧瑞安电气有限公司 | A kind of 1140V permanent magnet direct-driven variable-frequency motor all-in-one machine major loop structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU UONONE NEW ENERGY CO., LTD. Free format text: FORMER OWNER: JIANGSU NICETOWN ELECTRIC WHOLE SET CO., LTD. Effective date: 20130703 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130703 Address after: South Road Yangzhong City, Jiangsu province 212211 New Technology Park No. 1 Patentee after: Jiangsu Uonone New Energy Co., Ltd. Address before: South Road Yangzhong City, Jiangsu province 212211 New Technology Park No. 1 Patentee before: Jiangsu Nicetown Electric Whole Set Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20140727 |
|
| EXPY | Termination of patent right or utility model |