CN205945530U - Wind power converter - Google Patents
Wind power converter Download PDFInfo
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- CN205945530U CN205945530U CN201620903318.5U CN201620903318U CN205945530U CN 205945530 U CN205945530 U CN 205945530U CN 201620903318 U CN201620903318 U CN 201620903318U CN 205945530 U CN205945530 U CN 205945530U
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- Prior art keywords
- current transformer
- side current
- converter
- bus
- wind electric
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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 utility model belongs to the technical field of wind power generation, a wind power converter is provided, main circuit breaker, net side harmonic filter, power module, machine side wave filter and isolator that this wind power converter includes the controller and connects gradually. The main circuit breaker still is connected with alternating current transformer. First power module includes a grid -side converter, first braking chopper and first machine side converter, and a grid -side converter's output is connected respectively in first braking chopper and first machine side converter, and a grid -side converter's input is connected in net side harmonic filter, and first machine side converter is connected in the machine side wave filter, and a grid -side converter's output still is connected with the 2nd grid -side converter's output, isolator still connects in the generator. The controller is connected with first braking chopper and second braking chopper respectively. The utility model discloses wind power converter can reduce the parasitic capacitance of equipment, the improve equipment reliability.
Description
Technical field
This utility model is related to technical field of wind power generation and in particular to a kind of wind electric converter.
Background technology
At present, wind-power electricity generation is greatly developed as a kind of new energy technology.Carry out energy using wind electric converter to turn
Change, it is possible to increase wind energy utilization.But, in application process, inside wind electric converter, it is also easy to produce larger stray inductance, fall
Low properties of product, and limit the size of electric current, lead to equipment easily to break down, maintenance cost is higher.
How to reduce the stray inductance of equipment, improve equipment dependability, be the problem of those skilled in the art's urgent need to resolve.
Utility model content
For defect of the prior art, this utility model provides a kind of wind electric converter, can reduce the parasitism of equipment
Electric capacity, improves equipment dependability.
This utility model provides a kind of wind electric converter, and this wind electric converter includes controller and the main open circuit being sequentially connected
Device, side harmonics wave filter, power model, pusher side wave filter and disconnecting switch；Main circuit breaker is also connected with AC transformer；Work(
Rate module includes the first power model and the second power model；First power model includes the first net side current transformer, the first braking
Chopper and the first pusher side current transformer, the outfan of the first net side current transformer is connected to the first brake chopper and the first machine
Side converter, the outfan of the first net side current transformer is connected to side harmonics wave filter, and the first pusher side current transformer is connected to pusher side
Wave filter；Second power model includes the second net side current transformer, the second brake chopper and the second pusher side current transformer, the second net side
The outfan of current transformer is connected to the second brake chopper and the second pusher side current transformer, the outfan of the second net side current transformer
It is connected to side harmonics wave filter, the second pusher side current transformer is connected to pusher side wave filter；The outfan of the first net side current transformer is also
It is connected with the outfan of the second net side current transformer；Disconnecting switch is also attached to electromotor；Controller brakes copped wave with first respectively
Device and the second brake chopper connect.
Further, the outfan of the first net side current transformer is connected with the first pusher side current transformer by the first dc bus；
The outfan of the second net side current transformer is connected with the second pusher side current transformer by the second dc bus.
Further, the first brake chopper includes the first insulated gate bipolar transistor being sequentially connected and the first braking
Resistance, the emitter stage of the first insulated gate bipolar transistor is connected to the first negative DC bus, and the first insulated gate bipolar is brilliant
The colelctor electrode of body pipe is connected to the first end of the first braking resistor, and the second end of the first braking resistor is connected to the first positive DC
Bus, the first dc bus includes the first positive DC bus and the first negative DC bus.
Further, the present embodiment wind electric converter also includes protecting cabinet, and the first brake chopper is located at protection cabinet
Interior.
Based on above-mentioned any wind electric converter embodiment, further, the present embodiment wind electric converter also includes converter
Cabinet, controller, main circuit breaker, side harmonics wave filter, power model, pusher side wave filter and disconnecting switch are located at converter cabinet
In vivo.
Further, converter cabinet includes warehouse, door-plate and foaming adhesive tape, and warehouse and door-plate are flexibly connected, in exchange
When device cabinet is in sealing state, foaming adhesive tape is located between warehouse and door-plate.
Based on above-mentioned any wind electric converter embodiment, further, it is female that the present embodiment wind electric converter also includes direct current
Line pre-charge module, one end of dc bus pre-charge module is connected to AC transformer, dc bus pre-charge module another
One end is connected to side harmonics wave filter.
Based on above-mentioned any wind electric converter embodiment, further, disconnecting switch is connected to the stator of electromotor.
Based on above-mentioned any wind electric converter embodiment, further, the first net side current transformer is AC/DC transducer, the
One pusher side current transformer is DC/AC transducer.
Further, main circuit breaker is Self-protecting chopper.
This utility model wind electric converter, in normal work, main circuit breaker keeps normally off, with from AC transformer
Receive alternating current, maintain normal voltage.Disconnecting switch keeps normally off, to provide electric energy for electromotor.Side harmonics filter
Device can remove the distortion composition in AC transformer output current, and filters effect to switch harmonic.First net side becomes
Alternating current can be converted to unidirectional current by stream device, and is sent to the first pusher side current transformer, and unidirectional current is turned by the first pusher side current transformer
It is changed to alternating current, alternating current can be converted to unidirectional current by the second net side current transformer, and be sent to the second pusher side current transformer, second
Unidirectional current is converted to alternating current by pusher side current transformer, and is filtered using pusher side wave filter, is generator powered.First net side
The outfan of current transformer is connected with the first brake chopper, the second brake chopper and the first pusher side current transformer respectively, the second net
The outfan of side converter is connected with the first brake chopper, the second brake chopper and the second pusher side current transformer respectively, controls
Device receives the situation of load, controls the working condition of brake chopper, consumes portion of energy, the power supply that adjustment electromotor is received
Power.
And, this wind electric converter adopt two-way paralleling model, will the first power model and the second power module parallel,
The position of the first brake chopper and the second brake chopper can flexibly be arranged, you can reduces stray inductance, and the first braking
Chopper is in parallel with the first pusher side current transformer, and the second brake chopper is in parallel with the second pusher side current transformer, can support bigger electricity
Stream passes through, and improves product reliability.
Therefore, this utility model wind electric converter can reduce stray inductance, and supports that high current is passed through.
Brief description
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
In specific embodiment or description of the prior art, the accompanying drawing of required use is briefly described.In all of the figs, similar
Element or partly typically identified by similar reference.In accompanying drawing, each element or part might not be according to actual ratios
Draw.
Fig. 1 shows a kind of structural representation of wind electric converter provided by the utility model；
Fig. 2 shows a kind of element connection diagram of wind electric converter provided by the utility model.
Specific embodiment
Below in conjunction with accompanying drawing, the embodiment of technical solutions of the utility model is described in detail.Following examples are only
For the technical solution of the utility model is clearly described, therefore it is intended only as example, and this reality can not be limited with this
With new protection domain.
It should be noted that unless otherwise stated, technical term used in this application or scientific terminology should be this reality
The ordinary meaning being understood with new one of ordinary skill in the art.
This utility model provide a kind of wind electric converter, in conjunction with Fig. 1 or Fig. 2, this wind electric converter include controller 1 and according to
The main circuit breaker 2 of secondary connection, side harmonics wave filter 3, power model, pusher side wave filter 5 and disconnecting switch 6.Main circuit breaker 2 is also
It is connected with AC transformer.Power model includes the first power model and the second power model, and the first power model includes first
Net side current transformer 411, the first brake chopper 412 and the first pusher side current transformer 413, the outfan of the first net side current transformer 411
It is connected to the first brake chopper 412 and the first pusher side current transformer 413, the input of the first net side current transformer 411 connects
In side harmonics wave filter 3, the first pusher side current transformer 413 is connected to pusher side wave filter 5, and the second power model includes the second net side
Current transformer 421, the second brake chopper 422 and the second pusher side current transformer 423, the outfan of the second net side current transformer 421 is respectively
It is connected to the second brake chopper 422 and the second pusher side current transformer 423, the input of the second net side current transformer 421 is connected to net
Side harmonic filter 3, the second pusher side current transformer 423 is connected to pusher side wave filter 5, and the outfan of the first net side current transformer 411 is also
It is connected with the outfan of the second net side current transformer 421.Disconnecting switch 6 is also attached to electromotor.Controller 1 is braked with first respectively
Chopper 412 and the second brake chopper 422 connect.
The present embodiment wind electric converter, in normal work, main circuit breaker 2 keeps normally off, with from AC transformer
Receive alternating current, maintain normal voltage.Disconnecting switch 6 keeps normally off, to provide electric energy for electromotor.Side harmonics filter
Device 3 can remove the distortion composition in AC transformer output current, and filters effect to switch harmonic.First net side becomes
Alternating current can be converted to unidirectional current by stream device 411, and is sent to the first pusher side current transformer 413, and unidirectional current is converted to exchange
Electricity, alternating current can be converted to unidirectional current by the second net side current transformer 421, and is sent to the second pusher side current transformer 423, by direct current
Electricity is converted to alternating current, and is filtered using pusher side wave filter 5, is generator powered.The output of the first net side current transformer 411
End is connected with the first brake chopper 412, the second brake chopper 422 and the first pusher side current transformer 413 respectively, and the second net side becomes
The outfan of stream device 421 is respectively with the first brake chopper 412, the second brake chopper 422 and the second pusher side current transformer 423 even
Connect, controller 1 receives the situation of load, control the working condition of brake chopper, consume portion of energy, adjustment electromotor is connect
The output power received.
And, this wind electric converter adopt two-way paralleling model, will the first power model and the second power module parallel,
The position of the first brake chopper 412 and the second brake chopper 422 can flexibly be arranged, you can reduces stray inductance, and the
One brake chopper 412 is in parallel with the first pusher side current transformer 411, and the second brake chopper 422 and the second pusher side current transformer 421 are simultaneously
Connection, can support more high current to pass through, and improve product reliability.
Therefore, the present embodiment wind electric converter can reduce stray inductance, and supports that high current is passed through.
In order to improve the reliability of wind electric converter further, specifically, in terms of the hardware connection of power model, in conjunction with
Fig. 2, the outfan of the first net side current transformer 411 is connected with the first pusher side current transformer 413 by the first dc bus, the second net side
The outfan of current transformer 421 is connected with the second pusher side current transformer 423 by the second dc bus.First brake chopper 412 wraps
Include the first insulated gate bipolar transistor being sequentially connected and the first braking resistor, the transmitting of the first insulated gate bipolar transistor
Pole is connected to the first negative DC bus, and the colelctor electrode of the first insulated gate bipolar transistor is connected to the of the first braking resistor
One end, the second end of the first braking resistor is connected to the first positive DC bus, and the first dc bus includes the first positive DC
Bus and the first negative DC bus.Controller 1 can adjust the working condition of brake chopper according to the situation of extraneous load,
As flowed through the size of current of brake chopper.Controller 1 adjusts the first insulated gate bipolar transistor and the second insulated gate bipolar
The grid voltage of transistor npn npn, adjusts the working condition of two transistors, and the power simultaneously consuming in braking resistor changes,
To realize the power that regulator generator is received.
The present embodiment wind electric converter is additionally provided with dc bus pre-charge module, in conjunction with Fig. 2, dc bus pre-charge module
One end be connected to AC transformer, the other end of dc bus pre-charge module is connected to side harmonics wave filter 3.Generally straight
The presence of bulky capacitor is had on stream bus, dc bus pre-charge module can reduce the dash current in dc bus loop,
The charging current to bulky capacitor for the moment that limiting AC transformator is connected, to protect other yuan of dc bus or wind electric converter
Part, improves product reliability.
When being in an emergency, the control program in main circuit breaker 2 is able to ensure that and disconnects in zero point stream.Or setting
For when safeguarding, main circuit breaker 2 is set to off-state.And, main circuit breaker 2 is Self-protecting chopper, this circuit breaker internal
Be provided with under-voltage coil, can when main circuit breaker 2 is out of hand, automatically disconnect it is ensured that AC transformer in time and side harmonics
Wave filter 3 separates.Meanwhile, under the state of emergency, disconnecting switch 6 is off, and disconnecting switch 6 is provided with under-voltage coil,
After controlling electricity out of control, disconnecting switch 6 can disconnect automatically.And disconnecting switch 6 is directly connected with the stator of electromotor, for generating electricity
Machine provides energy.First net side current transformer 411 is AC/DC transducer, and the first pusher side current transformer 413 is DC/AC transducer.Second
Net side current transformer 421 is AC/DC transducer, and the second pusher side current transformer 423 is DC/AC transducer, by the friendship of AC transformer
Stream electricity is converted to unidirectional current, supply the first power model and the second power model.First net side current transformer 411 and the second net side become
Stream device 421 adopts vector controlled, can control input to the active power of pusher side and reactive power, realize to active and idle
Uneoupled control.Degree of accuracy using vector controlled is high, and adopts active power priority acccess control strategy, is had using DC voltage transmission
Work(power, the output pulsation that effectively variation of suppression instantaneous wind-force brings, reactive power can suppress the fluctuation of voltage, improves equipment
Operational efficiency and reliability, reduce cost of equipment maintenance.First power model and the second power model compact to design, can
Meet the requirement of high current density, and 3150 amperes of rated current output can be ensured.
In order to ensure this wind electric converter can effectively run in different environments, specifically, the present embodiment wind-powered electricity generation becomes
Stream device is provided with protection cabinet, and the first brake chopper and the second brake chopper are respectively positioned in protection cabinet, and protection cabinet is tool
The cabinet of standby IP2X protection level.This wind electric converter is additionally provided with converter cabinet, controller 1, main circuit breaker 2, net side simultaneously
Harmonic filter 3, power model, pusher side wave filter 5 and disconnecting switch 6 are located in converter cabinet.Brake chopper can be
In converter cabinet, or outside converter cabinet, flexibly arrange, the optimum position of brake chopper can be located in exchanging
The top of cabinet is it is ensured that safe distance between resistance and rack enclosure.
Meanwhile, in order to ensure each device in converter cabinet operates in the temperature of adaptation, the present embodiment wind-powered electricity generation unsteady flow
Device is additionally provided with and adjusts the equipment such as fan, heater and the edema due to wind pathogen exchanger of temperature it is ensured that the temperature of converter cabinet, for example permissible
It is between 45 DEG C to 55 DEG C.The present embodiment wind electric converter adopts liquid cooling mode, and design parameter is as follows：
| Description | Value |
| Cooling liquid | Water+anti-icing fluid |
| Liquid cooling power loss | Maximum loss is 80KW |
| Liquid cooling turnover rate | 275 liters/min (± 10 liters) |
| Mixing ratio | 48% water/52% anti-icing fluid |
| The maximum temperature of cooling liquid | 55℃ |
| The minimum temperature of cooling liquid | 5℃ |
| Cooling liquid temperature difference | <10K |
| Pressure drop | 2.3bar (approximate). |
In order to ensure this wind electric converter can at sea water smoke is many, smog big in the case of run, this converter cabinet
Also there is the effect such as insulation, protection against the tide, protection from fumes.Converter cabinet selects the material of the atmospheric corrosion resistance such as corrosion-resisting steel, rustless steel, aluminium
Material, meanwhile, improves its internal structure by the hot and cold processing and Technology for Heating Processing of metal material, improves the against corrosion of metal material
Ability.Rack itself is tested to select most suitable protective coating system in strict accordance with ISO12944-6 performance obtained in laboratory.Unsteady flow
Device cabinet adopts silica gel isolator to replace porcelain insulator.The spy such as silica gel isolator has small volume, lightweight, anti-pollution characteristic is good
Point.Converter cabinet includes warehouse, door-plate and foaming adhesive tape, and warehouse and door-plate are flexibly connected, and are in sealing in converter cabinet
During state, foaming adhesive tape is located between warehouse and door-plate.Converter cabinet to realize door-plate and the storehouse of rack using foaming adhesive tape
The sealing of body, reaches the IP54 degree of protection required by wind power product.The external socket of rack control system adopts IP68 to protect
Grade, adopts the waterproof terminal of IP68 degree of protection it is ensured that wind electric converter is with outward at the input of outer welding system, output cord
The insulating protection of welding system changeover section and seal, prevent electric lap-joint from making moist, discharge and corroding.
Finally it should be noted that：In the description of the present embodiment, unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection ", the term such as " fixation " should be interpreted broadly, for example, it may be being fixedly connected or detachably
Connect, or integral；Can be to be mechanically connected or electrically connect；Can be to be joined directly together it is also possible to pass through intermediary
It is indirectly connected to, can be the connection of two element internals or the interaction relationship of two elements.Common skill for this area
For art personnel, concrete meaning in this utility model for the above-mentioned term can be understood as the case may be.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or more, remove
Non- separately have clearly specifically limit.
Various embodiments above only in order to the technical solution of the utility model to be described, is not intended to limit；Although with reference to aforementioned
Each embodiment has been described in detail to this utility model, it will be understood by those within the art that：It is still permissible
Technical scheme described in foregoing embodiments is changed, changes, or wherein some or all of technical characteristic is entered
Row equivalent and modification；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this utility model each
The scope of embodiment technical scheme, it all should be covered in the middle of the scope of claim of the present utility model and description.
Claims (10)
1. a kind of wind electric converter is it is characterised in that include：
Controller and the main circuit breaker, side harmonics wave filter, power model, pusher side wave filter and the disconnecting switch that are sequentially connected；
Described main circuit breaker is also connected with AC transformer；
Described power model includes the first power model and the second power model；
Described first power model includes the first net side current transformer, the first brake chopper and the first pusher side current transformer, and described
The outfan of one net side current transformer is connected to described first brake chopper and described first pusher side current transformer, and described first
The input of net side current transformer is connected to described side harmonics wave filter, and described first pusher side current transformer is connected to described pusher side filter
Ripple device；
Described second power model includes the second net side current transformer, the second brake chopper and the second pusher side current transformer, and described
The outfan of two net side current transformers is connected to described second brake chopper and described second pusher side current transformer, and described second
The input of net side current transformer is connected to described side harmonics wave filter, and described second pusher side current transformer is connected to described pusher side filter
Ripple device；
The outfan of described first net side current transformer is also connected with the outfan of described second net side current transformer；
Described disconnecting switch is also attached to electromotor；
Described controller is connected with described first brake chopper and described second brake chopper respectively.
2. according to claim 1 wind electric converter it is characterised in that
The outfan of described first net side current transformer is connected with described first pusher side current transformer by the first dc bus；
The outfan of described second net side current transformer is connected with described second pusher side current transformer by the second dc bus.
3. according to claim 2 wind electric converter it is characterised in that
Described first brake chopper includes the first insulated gate bipolar transistor being sequentially connected and the first braking resistor,
The emitter stage of described first insulated gate bipolar transistor is connected to the first negative DC bus, and described first insulated gate is double
The colelctor electrode of bipolar transistor is connected to the first end of described first braking resistor,
Second end of described first braking resistor is connected to the first positive DC bus, and described first dc bus includes described
One positive DC bus and described first negative DC bus.
4. according to claim 1 wind electric converter it is characterised in that also include protect cabinet, described first braking copped wave
Device is located in described protection cabinet.
5. according to claim 1 wind electric converter it is characterised in that also including：
Converter cabinet, described controller, described main circuit breaker, described side harmonics wave filter, described power model, described machine
Side filter and described disconnecting switch are located in described converter cabinet.
6. according to claim 5 wind electric converter it is characterised in that
Described converter cabinet includes warehouse, door-plate and foaming adhesive tape, and described warehouse and described door-plate are flexibly connected, in described friendship
When stream device cabinet is in sealing state, described foaming adhesive tape is located between described warehouse and described door-plate.
7. according to claim 1 wind electric converter it is characterised in that also including：
Dc bus pre-charge module, one end of described dc bus pre-charge module is connected to described AC transformer, described
The other end of dc bus pre-charge module is connected to described side harmonics wave filter.
8. according to claim 1 wind electric converter it is characterised in that
Described disconnecting switch is connected to the stator of described electromotor.
9. according to claim 1 wind electric converter it is characterised in that
Described first net side current transformer is AC/DC transducer,
Described first pusher side current transformer is DC/AC transducer.
10. according to claim 1 wind electric converter it is characterised in that
Described main circuit breaker is Self-protecting chopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903318.5U CN205945530U (en) | 2016-08-18 | 2016-08-18 | Wind power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903318.5U CN205945530U (en) | 2016-08-18 | 2016-08-18 | Wind power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945530U true CN205945530U (en) | 2017-02-08 |
Family
ID=57947140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620903318.5U Expired - Fee Related CN205945530U (en) | 2016-08-18 | 2016-08-18 | Wind power converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964435A (en) * | 2017-05-19 | 2018-12-07 | 北京金风科创风电设备有限公司 | The starting method and system of wind electric converter |
-
2016
- 2016-08-18 CN CN201620903318.5U patent/CN205945530U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964435A (en) * | 2017-05-19 | 2018-12-07 | 北京金风科创风电设备有限公司 | The starting method and system of wind electric converter |
| CN108964435B (en) * | 2017-05-19 | 2020-11-10 | 北京金风科创风电设备有限公司 | Wind power converter startup method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170208 Termination date: 20200818 |