CN107887924A - Fan power transmission system - Google Patents
Fan power transmission system Download PDFInfo
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- CN107887924A CN107887924A CN201711384968.9A CN201711384968A CN107887924A CN 107887924 A CN107887924 A CN 107887924A CN 201711384968 A CN201711384968 A CN 201711384968A CN 107887924 A CN107887924 A CN 107887924A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 44
- 230000005611 electricity Effects 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000005389 magnetism Effects 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H02J3/386—
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of wind power transmission, in particular to a fan power transmission system. The fan power transmission system includes: the system comprises a plurality of groups of wind generating sets and a power transmission bus connected with the wind generating sets; each group of wind generating set comprises a wind wheel, a multi-winding direct drive motor, a converter, a multi-winding transformer and a rectifier which are electrically connected in sequence; and the output end of the rectifier in each group of wind generating set is connected with the power transmission bus. According to the wind power generation system, the wind generating sets are connected in parallel, so that alternating current generated by the generator is converted into high-voltage direct current in the wind power plant, and the cost of electric energy transmission is reduced.
Description
Technical field
The present invention relates to wind-powered electricity generation transmission technique field, more particularly to a kind of blower fan transmission system.
Background technology
Establish the important means that marine wind electric field is open regenerative resource, compared with land wind power plant, marine wind electric field
Not only there is more abundant wind energy resources, and be not take up land resources, rapidly become the study hotspot of wind power generation field.
Compared with ac transmission, direct current transportation does not have reactive power conveying, and therefore, it is off sea that HVDC Transmission Technology turns into long distance
Upper wind farm grid-connected optimal selection, but HVDC Transmission Technology needs to build the electric platform in large-scale sea to support sea to change
Stream station.At sea building the electric platform of Large marine, not only cost is very high, and it is very big to build difficulty.Traditional marine wind electric field
Need to use more electric energy converting equipment that low frequency ac is converted into high voltage direct current, this not only adds system cost,
And the multiple conversions of energy add system loss.
Prior art utilizes more typhoon power generators and a controller, and the wind-driven generator connects AC-DC transverters,
The DC output side of the AC-DC transverters is parallel with dc-link capacitance and half-H-bridge transverter, by more typhoon power generators pair
The outlet side series connection for the more half-H-bridge transverters answered.But this cascaded structure is used, will once a blower fan breaks down
Cause DC bus-bar voltage failure.
The content of the invention
The purpose of the present invention aims to provide a kind of blower fan transmission system, and high voltage direct current is converted alternating current to realize
Purpose, while avoid being also easy to produce the phenomenon of transmission of electricity busbar voltage failure during cascaded structure progress direct current transportation.
To achieve these goals, the present invention provides following technical scheme：
A kind of blower fan transmission system, including：Multigroup wind power generating set and located at the defeated of the wind power generating set side
Goddess of lightning's line；Wind power generating set described in every group includes wind wheel and the Multiple coil direct driving motor being electrically connected with successively, current transformer, more
Winding transformer and rectifier；The output end of rectifier in wind power generating set described in every group is connected with the transmission of electricity bus.
Preferably, the Multiple coil direct driving motor is permanent magnet direct-driving aerogenerator.
Preferably, the rotor of the permanent magnet direct-driving aerogenerator and wind wheel are coaxially connected, permanent magnet direct-driving aerogenerator
Stator have a 3N winding, N >=3, every three windings form one group of three-phase alternating current system.
Specifically, the current transformer is that single-phase medium pressure grade joins current transformer, the input of the single-phase medium pressure grade connection current transformer
One group of three-phase windings of mouth and the Multiple coil direct driving motor are electrically connected with, the output port of the single-phase medium pressure grade connection current transformer
It is electrically connected with the primary side winding of multiwinding transformer.
Specifically, the multiwinding transformer include be used for adjust conveying voltage swing primary side winding and multiple secondary around
Group, the primary side winding of the multiwinding transformer are connected with single-phase medium pressure grade connection current transformer, the secondary of the multiwinding transformer
Winding is connected with the input terminal of the rectifier.
Specifically, the single-phase medium pressure grade connection current transformer includes several Integral power units mutually cascaded；It is described
The first lead-out terminal of Integral power unit described in the first order in several Integral power units mutually cascaded is and more
The first terminal connection of winding transformer primary side winding, the second lead-out terminal of Integral power unit described in afterbody, with
The Second terminal connection of multiwinding transformer primary side winding；Adjacent institute outside the first order and afterbody Integral power unit
The second lead-out terminal for stating Integral power unit described in the upper level in Integral power unit is integrated with described in next stage
The first lead-out terminal connection of power cell.
Specifically, the rectifier is that single-phase medium pressure grade joins rectifier, the input of the single-phase medium pressure grade connection rectifier
The vice-side winding of mouth and multiwinding transformer is electrically connected with, the output port of the single-phase medium pressure grade connection rectifier and the transmission of electricity
Bus is connected.
Specifically, the transmission of electricity bus includes direct current positive bus and direct current negative busbar.
Specifically, the single-phase medium pressure grade connection rectifier includes several H bridge rectified power units mutually cascaded, described
The quantity of H bridge rectified power units is identical with the quantity of the vice-side winding of the multiwinding transformer.
Specifically, every grade of H bridges rectified power unit includes H bridges rectifier, the bus in parallel electricity being sequentially connected
Appearance and discharge resistance；The bus capacitor of every grade of H bridges rectified power unit includes positive output port and negative output port, and first
The positive output port of the bus capacitor of level H bridge rectified power units is connected with direct current positive bus, last described H bridge
The negative output port of the bus capacitor corresponding to rectified power unit is connected with direct current negative busbar, the first order and afterbody
Beyond H bridge rectified power units in remaining adjacent H bridges rectified power unit upper level H bridge rectified power units negative output port
It is connected with the positive output port of next stage H bridge rectified power unit median generatrix electric capacity.
Compared with prior art, the solution of the present invention has advantages below：
The present invention is defeated by the output end of rectifier and the direct current using parallel-connection structure using multigroup wind power generating set
Goddess of lightning's line is joined directly together, and is realized by multigroup wind power generating set and is converted to low frequency ac caused by wind wheel in direct current
Piezoelectricity is transported in conveying bus, and without establishing large-scale marine convector or marine electric platform, blower fan transmission of electricity is established in reduction
The cost of system；Moreover, when avoiding wind power generating set and using any group of blower fan easily occurring during cascaded structure to break down
Cause the voltage failure problem of transmission of electricity bus.
Wind power generating set provided by the invention includes multiwinding transformer, expands capacity by raising voltage class, keeps away
The problems such as exempting to occur stream or circulation, improve the reliability of blower fan transmission system.
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structural representation of blower fan transmission system provided by the invention；
Fig. 2 is the structural representation of wind power generating set provided by the invention；
Fig. 3 is that Integral power unit cascades schematic diagram in current transformer provided by the invention；
Fig. 4 is the unit cascaded schematic diagram of H bridge rectified powers in rectifier provided by the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Present invention firstly provides a kind of blower fan transmission system, its structural representation is as shown in figure 1, blower fan transmission of electricity system
System includes：Multigroup wind power generating set 1 and the transmission of electricity bus 2 located at the side of wind power generating set 1；Wind-force described in every group is sent out
Group of motors 1 include the one-level of wind wheel 31 be electrically connected with successively Multiple coil direct driving motor 32, current transformer 33, multiwinding transformer 34,
Rectifier 35；The output end of rectifier 35 in wind power generating set 1 described in every group is connected with the transmission of electricity bus 2.
As shown in figure 1, the blower fan transmission system of the multiwinding transformer includes P groups wind power generating set 1 in parallel, often
The output end of individual wind power generating set 1 is electrical connected with the transmission of electricity bus 2 of its net side respectively.The mould of the wind power generating set 1
Block schematic diagram as shown in Fig. 2 including：Wind wheel 31 and the Multiple coil direct driving motor 32 being electrically connected with successively, current transformer 33, more around
Group transformer 34, rectifier 35.
The wind wheel 31 transforms wind energy into mechanical energy, and the low frequency ac that Multiple coil direct driving motor 32 is sent is through current transformer
During 33 are converted to high-frequency alternating current, and then are converted into middle pressure alternating current through multiwinding transformer 34, then rectified device 35 is converted into
Direct current is pressed, medium pressure direct current is delivered on the bank through bus 2 of transmitting electricity again, and interior land transverter changes medium voltage DC
It is followed by into exchange into public electric wire net.
What deserves to be explained is the voltage that the low pressure described in the present invention is tens volts, described middle pressure is tens kilovolts of electricity
Pressure, the present invention preferably medium pressure electricity are relatively high pressure, therefore because medium pressure is higher by much than low pressure for 35KV or so
The saying that low tension is converted to high-tension electricity in the present invention be present.
The transmission of electricity bus 2 includes direct current positive bus and direct current negative busbar.What the transmission of electricity bus 2 conveyed is direct current.
Because the voltage of direct current transportation bus 2 is controllable, the problem of caused voltage ripple of power network when wind speed changes can be avoided；And
And transmission of electricity bus 2 can lift transmission distance, and reduce the cost of transmission line of electricity using the direct current transportation mode of two cables.
The present invention is directly connected to be driven using direct driving motor 32, removes gear-box this part from, produces the same of electric energy
When noise when reducing electric power generation, failure frequency higher part when due to gear-box being wind-power electricity generation assembly operating,
Direct driving motor 32 eliminates gear-box and its annex, simplifies drive mechanism, improves the reliability of generating set, meanwhile, hair
When group of motors is run at the low rotational speed, rotary part is less, and reliability is higher, and non-gear box and its annex reduce wind-power electricity generation
The amount of parts of unit, the periodic replacement of gear-box is avoided, reduce generating set volume, reduce operation expense.
The preferably Multiple coil direct driving motor 32 of the invention is permanent magnet direct-driving aerogenerator.The permanent magnet direct-drive wind-force hair
The rotor of motor and the wind wheel 31 are coaxially connected, and the stator of permanent magnet direct-driving aerogenerator has a 3N winding, N >=3, every three
Winding forms one group of three-phase alternating current system.N size is not only related to medium pressure grade connection current transformer 33, machine winding, at the same also with
The manufacturing process of motor is related.
Similarly, the permanent magnet direct-driving aerogenerator does not have gear-box, reduces power transmission loss, improves generating effect
Rate, and permanent magnet direct driving motor 32 is simple in construction, power factor is high, and control strategy computing is relatively easy, and reliability is high.
It is connected with the output end of the Multiple coil direct driving motor 32 with the input of current transformer 33, the current transformer 33 is preferred
Join current transformer 33 for single-phase medium pressure grade, the single-phase medium pressure grade connection current transformer 33 includes several integrated power mutually cascaded
Unit 330, with reference to shown in figure 1 and Fig. 2, the single-phase medium pressure grade connection current transformer 33 includes N number of Integral power unit
330, each Integral power unit 330 has three input terminals and two lead-out terminals, three input terminals with it is straight
One group of three-phase windings for driving motor 32 are connected, the lead-out terminal of described two lead-out terminals and other Integral power units 330
It is connected or the output port as current transformer 33 is connected with the primary side winding of multiwinding transformer 34.Specific connection situation is such as
Under：The first lead-out terminal of first Integral power unit 330 and the first end of the primary side winding of multiwinding transformer 34
The of mouthful connection, the second lead-out terminal of first Integral power unit 330 and second Integral power unit 330
One lead-out terminal is connected；Second lead-out terminal of Integral power unit 330 described in n-th and the primary side of multiwinding transformer 34
The second port connection of winding, the first lead-out terminal of Integral power unit 330 described in n-th and (N-1) individual described one
Second lead-out terminal of body power cell 330 is connected, the first lead-out terminal of remaining Integral power unit 330 with
Second lead-out terminal of a upper Integral power unit 330 is connected, the second lead-out terminal with it is next described integrated
The first lead-out terminal connection of power cell 330.
The Integral power unit 330 of the single-phase medium pressure grade connection current transformer 33 cascades schematic diagram as shown in figure 3, Fig. 3 master
The connection of the inner structure part of two-stage Integral power unit 330, each Integral power unit 330 are equal before illustrating
Including three-phase PWM (pulse-width modulation, dual pulse width modulation) rectifier 331, bus capacitor and discharge resistance
332nd, chopper components and unload can resistance 333, H bridge inverters 334.The input signal of the Integral power unit 330 is from institute
Three input terminals for stating Three-Phase PWM Rectifier 331 enter the Integral power unit 330, through the bus capacitor and put
Resistance 332, chopper components and unload can resistance 333, export from two lead-out terminals of H bridge inverters 334, except first
Individual and last described Integral power unit 330, the H bridge inverters 334 of remaining all Integral power unit 330
First lead-out terminal is connected with the second lead-out terminal of the H bridge inverters 334 of upper level Integral power unit 330, integration
Second lead-out terminal of the H bridge inverters 334 of power cell 330 and the H bridge inverters of next stage Integral power unit 330
334 first lead-out terminal is connected.
The alternating current that the direct driving motor 32 is sent by Three-Phase PWM Rectifier 331 be converted to direct current and to bus electricity
Capacity charge, bus capacitor is in parallel with H bridge inverters 334, and whether the bus capacitor discharges is controlled by H bridge inverters 334.
The Integral power unit 330 uses Three-Phase PWM Rectifier 331, substitutes half control with full-control type power switch pipe
Type power switch pipe or diode, control rectification substitution phase control rectifier or uncontrollable rectifier are cut with PWM, realize that net side power factor can
Control, transmitted in both directions and the response of faster dynamic control of electric energy can be realized.
The present invention reduces conveying electric current using single-phase medium pressure grade connection current transformer 33, is compared to volage current transformer 33 in three-phase and fills
Put, greatly reduce modular multilevel change phase (MMC) cascade module quantity, reduce production cost, avoid due to
Cross a series of problems caused by the connection of multimode.
The Integral power unit 330 expands capacity by the form of cascade, avoids the technology such as stream or/and circulation
Problem, improve the reliability of blower fan transmission system；Moreover, the voltage that medium pressure cascade rectifier 35 exports is high, electric current is small,
The few midium voltage cable of quantity is only needed to reduce the loss of machine system with regard to the voltage of equivalent amount can be conveyed.
The Multiple coil direct driving motor 32 and the current transformer 33 are focused in cabin by the present invention, it is only necessary to which quantity is few
Midium voltage cable electric energy is transferred in the current transformer 33 of bottom of towe by high tower, alleviate untying the mooring rope for blower fan transmission system significantly
Pressure.
The lead-out terminal and Multiple coil transformation that the single-phase medium pressure grade connection current transformer 33 passes through the interior H bridge inverters 334 set
Device 34 is connected, and the multiwinding transformer 34 includes being used for the primary side winding and vice-side winding for adjusting conveying voltage swing, such as Fig. 2
Described, the multiwinding transformer 34 includes a primary side winding and several vice-side windings, the multiwinding transformer 34
Input of the primary side winding as multiwinding transformer 34, it is connected with the lead-out terminal of single-phase medium pressure grade connection current transformer 33, it is described
The vice-side winding of multiwinding transformer 34 is connected with the input terminal of the rectifier 35.
The present invention is powered by multiwinding transformer 34 to the different equipment of multiple voltage requirements, the output voltage it is big
Small relevant with the vice-side winding number of turn, the present invention uses multiwinding transformer 34 as each different rectified power unit power supply, will
Each H bridge power units are isolated from each other.Entered by multiwinding transformer 34 by voltage conversion is conveyed for ease of the voltage of conveying
Row transmission, avoid producing stream in transmitting procedure or the problems such as circulation, and advantageously reduce the cost of transmission system.
Rectifier 35 provided by the invention is that single-phase medium pressure grade joins rectifier 35, shown single-phase medium pressure grade connection rectifier 35
Input is connected with the vice-side winding of multiwinding transformer 34, and it is mutual that the single-phase medium pressure grade connection rectifier 35 includes several
The H bridge rectified powers unit 350 of cascade, the quantity of the H bridges rectified power unit 350 and the pair of the multiwinding transformer 34
The quantity of side winding is consistent, as shown in Fig. 2 H bridge rectified powers unit 350 includes two input ports and two output ports, H
The vice-side winding of the quantity of bridge rectified power unit 350 and the multiwinding transformer 34 has M, M H bridge rectified power list
The connected mode of member 350 is as follows：Inputted corresponding to first H bridge rectified powers unit 350 of single-phase medium pressure grade connection rectifier 35
Port is connected with first pair of output port of the Multiple coil vice-side winding of the multiwinding transformer 34, and single-phase medium pressure grade joins rectification
The Multiple coil secondary of input port corresponding to the m-th H bridge rectified powers unit 350 of device 35 and the multiwinding transformer 34 around
The M of group connects to output port.The H bridges rectified power unit 350 includes two output ports, respectively positive output port
3521 and negative output port 3522, positive output port 3521 corresponding to first H bridges rectified power unit 350 with direct current just
Bus is connected, and negative output port 3522 corresponding to H bridges rectified power unit 350 described in m-th is connected with direct current negative busbar.
H bridge rectified powers unit 350 with reference to shown in figure 4 cascades schematic diagram, the H of the single-phase medium pressure grade connection rectifier 35
Bridge rectified power unit 350 includes：H bridges rectifier 351, bus capacitor and the discharge resistance 352 being sequentially connected.Electric signal is from H
The input of bridge rectifier 351 enters the H bridges rectifier 351, and from the output of the bus capacitor and discharge resistance 352
Port is connected, and the bus capacitor and discharge resistance 352 include bus capacitor in parallel, discharge resistance, the bus capacitor
One end is positive output port 3521, and the other end is negative output port 3522, the mother of first order H bridge rectified powers unit 350
The positive output port 3521 of line capacitance is connected with direct current positive bus, the negative output port 3522 and of first bus capacitor
The positive output port 3521 of two bus capacitors is connected, and bus capacitor positive output port 3521 described in m-th and M-1 are individual
The negative output port 3522 of the bus capacitor is connected, negative output port 3522 and the negative mother of direct current of bus capacitor described in m-th
Line is connected.
When electric energy transmits from rectifier 35 to motor drive direction, single-phase medium pressure grade connection rectifier 35 becomes single-phase medium pressure grade connection
Inverter, direct current energy is changed into alternating current, realizes the transmitted in both directions of electric energy.Shown rectifier 35 is expanded by the form of cascade
Capacity, avoid stream or the problems such as circulation, improve the reliability of blower fan transmission system.
To sum up, the present invention is converted to low frequency ac caused by wind wheel using multigroup wind power generating set of parallel-connection structure
Piezoelectricity is transported in conveying bus in direct current, realizes the power attenuation and Transmission Cost for reducing electric energy in course of conveying, and
Caused conveying bus during the cascaded structure using wind power generating set is avoided the problem of voltage failure occur.
Described above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. blower fan transmission system, it is characterised in that including：Multigroup wind power generating set (1) and with the wind-driven generator The transmission of electricity bus (2) of group (1) connection；Wind power generating set (1) described in every group includes wind wheel (31) and is electrically connected with successively Multiple coil direct driving motor (32), current transformer (33), multiwinding transformer (34) and rectifier (35)；Wind-driven generator described in every group The output end of rectifier (35) in group (1) is connected with the transmission of electricity bus (2).
- 2. blower fan transmission system according to claim 1, it is characterised in that the Multiple coil direct driving motor (32) is permanent magnetism Direct wind-driven generator.
- 3. blower fan transmission system according to claim 2, it is characterised in that the rotor of the permanent magnet direct-driving aerogenerator Coaxially connected with wind wheel (31), the stator of permanent magnet direct-driving aerogenerator has 3N winding, N >=3, and every three windings form one group Three-phase alternating current system.
- 4. the blower fan transmission system according to any one of claim 1-3, it is characterised in that the current transformer (33) is single Phase medium pressure grade joins current transformer, the input port and the one of the Multiple coil direct driving motor (32) of the single-phase medium pressure grade connection current transformer Group three-phase windings are electrically connected with, the output port of the single-phase medium pressure grade connection current transformer and the primary side of multiwinding transformer (34) around Group is electrically connected with.
- 5. blower fan transmission system according to claim 4, it is characterised in that the multiwinding transformer (34) includes being used for Adjustment conveying voltage swing primary side winding and multiple vice-side windings, the primary side winding of the multiwinding transformer (34) with it is single-phase Medium pressure grade connection current transformer (33) is connected, the vice-side winding of the multiwinding transformer (34) and the input of the rectifier (35) Son is connected.
- 6. blower fan transmission system according to claim 5, it is characterised in that if the single-phase medium pressure grade connection current transformer includes The dry Integral power unit (330) mutually cascaded；In the Integral power unit that several are mutually cascaded (330) The first lead-out terminal of Integral power unit described in the first order (330), first with multiwinding transformer (34) primary side winding Terminal connects, the second lead-out terminal of Integral power unit (330) described in afterbody, with multiwinding transformer (34) primary side The Second terminal connection of winding；The adjacent integrated work(outside the first order and afterbody Integral power unit (330) The second lead-out terminal of Integral power unit (330) is integrated with described in next stage described in upper level in rate unit (330) The first lead-out terminal connection of power cell (330).
- 7. blower fan transmission system according to claim 6, it is characterised in that the rectifier (35) joins for single-phase medium pressure grade Rectifier, the input port of the single-phase medium pressure grade connection rectifier and the vice-side winding of multiwinding transformer are electrically connected with, described The output port of single-phase medium pressure grade connection rectifier is connected with the transmission of electricity bus.
- 8. blower fan transmission system according to claim 7, it is characterised in that the transmission of electricity bus (2) includes direct current positive pole Line and direct current negative busbar.
- 9. blower fan transmission system according to claim 8, it is characterised in that if the single-phase medium pressure grade connection rectifier includes The dry H bridge rectified power unit (350) mutually cascaded, quantity and the Multiple coil of the H bridges rectified power unit (350) The quantity of the vice-side winding of transformer (34) is identical.
- 10. blower fan transmission system according to claim 9, it is characterised in that every grade of H bridges rectified power unit (350) H bridges rectifier (351), the bus capacitor and discharge resistance (352) in parallel being sequentially connected are included；Every grade of H bridge The bus capacitor of rectified power unit (350) includes positive output port (3521) and negative output port (3522), first order H bridges are whole The positive output port (3521) of the bus capacitor of stream power cell (350) is connected with direct current positive bus, afterbody institute The negative output port (3522) for stating the bus capacitor of H bridge rectified power units (350) is connected with direct current negative busbar, and first Upper level H bridges are whole in remaining adjacent H bridges rectified power unit (350) beyond level and afterbody H bridge rectified power units (350) Flow the negative output port (3522) of power cell and the positive output end of next stage H bridge rectified power unit (350) median generatrix electric capacity Mouth (3521) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384968.9A CN107887924A (en) | 2017-12-20 | 2017-12-20 | Fan power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384968.9A CN107887924A (en) | 2017-12-20 | 2017-12-20 | Fan power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107887924A true CN107887924A (en) | 2018-04-06 |
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| CN201711384968.9A Pending CN107887924A (en) | 2017-12-20 | 2017-12-20 | Fan power transmission system |
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| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
| CN113937814A (en) * | 2021-10-26 | 2022-01-14 | 中国华能集团清洁能源技术研究院有限公司 | Double-wind-wheel double-motor direct-current series-parallel switching unified grid-connected system |
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| CN107947222A (en) * | 2017-12-26 | 2018-04-20 | 北京金风科创风电设备有限公司 | Direct current fan power transmission system |
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| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
| CN113937814A (en) * | 2021-10-26 | 2022-01-14 | 中国华能集团清洁能源技术研究院有限公司 | Double-wind-wheel double-motor direct-current series-parallel switching unified grid-connected system |
| CN114123297A (en) * | 2021-10-26 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Three-input single-output direct current series-parallel connection grid-connected switching system for wind power generation |
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| CN114123297B (en) * | 2021-10-26 | 2023-11-07 | 中国华能集团清洁能源技术研究院有限公司 | Three-input single-output direct current series-parallel grid-connected switching system for wind power generation |
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