CN209072369U - Ac-dc conversion device, wind power generating set and windfarm system - Google Patents
Ac-dc conversion device, wind power generating set and windfarm system Download PDFInfo
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- CN209072369U CN209072369U CN201821930631.3U CN201821930631U CN209072369U CN 209072369 U CN209072369 U CN 209072369U CN 201821930631 U CN201821930631 U CN 201821930631U CN 209072369 U CN209072369 U CN 209072369U
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Abstract
The utility model embodiment discloses a kind of ac-dc conversion device, wind power generating set and windfarm system.The ac-dc conversion device includes: Multiple coil phase-shifting transformer and tandem type rectifier；Multiple coil phase-shifting transformer includes a first winding and N number of secondary winding；Tandem type rectifier includes N number of three phase rectifier unit；I-th of secondary winding is connected with i-th of three phase rectifier unit, 1≤i≤N；The anode of the DC output end of the cathode and n-th three phase rectifier unit of the DC output end of 1st three phase rectifier unit is as external connection interface；The anode of the DC output end of j-th of three phase rectifier unit is connected with the cathode of the DC output end of+1 three phase rectifier unit of jth, 1≤j≤N-1.The ac-dc conversion device, wind power generating set and windfarm system of the utility model embodiment can be effectively reduced line cost and the active consumption of route, improve system stability.
Description
Technical field
The utility model relates to technical field of wind power generation more particularly to a kind of ac-dc conversion devices, wind-driven generator
Group and windfarm system.
Background technique
Transmission of electricity link is mostly high-voltage AC transmission mode in wind power plant at present.Windfarm system based on ac transmission mode
As shown in Figure 1.Windfarm system based on ac transmission mode includes: wind energy conversion system 1, generator 2, wind electric converter 3, box change
Depressor 4, exchange collection electric line 5, main transformer 6 and power grid 7.
It is that mechanical energy inputs generator 2 that wind energy conversion system 1, which absorbs wind energy transformation,.Mechanical energy is converted electric energy input by generator 2
Wind electric converter 3.Wind electric converter 3 generates low-voltage AC and inputs box type transformer 4.Box type transformer 4 is by low-voltage AC
High Level AC Voltage is converted to, exchange collection electric line 5 is output to, realizes high voltage AC transmission in wind power plant.High Level AC Voltage passes through
Main transformer 6 is converted to the alternating current input power grid 7 of suitable voltage class.
But using high-voltage AC transmission, line cost is higher, route damages that power is larger, and system stability is poor.
Utility model content
The utility model embodiment provides a kind of ac-dc conversion device, wind power generating set and windfarm system, can
Line cost and the active consumption of route is effectively reduced, improves system stability.
On the one hand, the utility model embodiment provides a kind of ac-dc conversion device, and device includes: that Multiple coil phase shift becomes
Depressor and tandem type rectifier；
Multiple coil phase-shifting transformer includes a first winding and N number of secondary winding；
Tandem type rectifier includes N number of three phase rectifier unit；
I-th of secondary winding is connected with i-th of three phase rectifier unit, 1≤i≤N；
The DC output end of the cathode and n-th three phase rectifier unit of the DC output end of 1st three phase rectifier unit
Anode is used as external connection interface；
The anode of the DC output end of j-th of three phase rectifier unit and the DC output end of+1 three phase rectifier unit of jth
Cathode connection, 1≤j≤N-1.
In one embodiment of the utility model, three phase rectifier unit includes: first diode, the second diode,
Three diodes, the 4th diode, the 5th diode and the 6th diode；
The connection of the cathode of the anode of first diode and the second diode；
The connection of the cathode of the anode of third diode and the 4th diode；
The cathode connection of the anode and the 6th diode of 5th diode；
The cathode of the cathode of first diode, the cathode of third diode and the 5th diode connects, as three phase rectifier
The anode of the DC output end of unit；
The anode of the anode of second diode, the anode of the 4th diode and the 6th diode connects, as three phase rectifier
The cathode of the DC output end of unit.
In one embodiment of the utility model, the anode for the first diode that i-th of three phase rectifier unit includes and
The common end of the cathode connection of second diode is connected with the first of i-th of secondary winding；
The common end of the cathode connection of the anode and the 4th diode of the third diode that i-th of three phase rectifier unit includes
It is connected with the second of i-th of secondary winding；
The common end of the cathode connection of the anode and the 6th diode of the 5th diode that i-th of three phase rectifier unit includes
It is connected with the third of i-th of secondary winding.
In one embodiment of the utility model, the shifting of the phase shifting angle of k-th of secondary winding than -1 secondary winding of kth
Phase angle big 60 °/N, 2≤k≤N.
On the other hand, the utility model embodiment provides a kind of wind power generating set, and wind power generating set includes: wind energy conversion system
And sequentially connected generator, wind electric converter and ac-dc conversion device provided by the embodiment of the utility model；Alternating current-direct current
The external connection interface and direct current current collection connection of converting means.
In one embodiment of the utility model, generator includes: magneto alternator.
In one embodiment of the utility model, direct current collection electric line includes: positive direct-current bus and negative DC bus；
The cathode and negative DC bus of the DC output end of the 1st three phase rectifier unit in ac-dc conversion device connect
It connects；
The anode of the DC output end of n-th three phase rectifier unit in ac-dc conversion device connects with positive direct-current bus
It connects.
In one embodiment of the utility model, the input port of wind electric converter and the output port of generator connect
It connects；The output port of wind electric converter is connect with the first winding in ac-dc conversion device.
In another aspect, the utility model embodiment provides a kind of windfarm system, windfarm system includes:
Multiple groups wind power generating set provided by the embodiment of the utility model, direct current collection electric line and converter valve；
Multiple groups wind power generating set respectively with direct current current collection connection；
Direct current collection electric line is also connect with converter valve, and converter valve is input to power grid for direct current to be converted to alternating current.
The ac-dc conversion device, wind power generating set and windfarm system of the utility model embodiment, it is defeated based on direct current
Electricity can be effectively reduced line cost and the active consumption of route compared to ac transmission, improve system stability.
Detailed description of the invention
It, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 shows the structural schematic diagram of the windfarm system based on ac transmission mode；
Fig. 2 shows the structural schematic diagrams of ac-dc conversion device provided by the embodiment of the utility model；
Fig. 3 shows the structural schematic diagram of tandem type rectifier provided by the embodiment of the utility model；
Fig. 4 shows the structural schematic diagram of wind power generating set provided by the embodiment of the utility model；
Fig. 5 shows the structural schematic diagram of windfarm system provided by the embodiment of the utility model.
Specific embodiment
The feature and exemplary embodiment of the various aspects of the utility model is described more fully below, in order to keep this practical new
The objects, technical solutions and advantages of type are more clearly understood, and with reference to the accompanying drawings and embodiments, carry out the utility model into one
Step detailed description.It should be understood that specific embodiment described herein is only configured to explain the utility model, it is not configured as
Limit the utility model.To those skilled in the art, the utility model can be in not needing these details
Implement in the case where some details.Below the description of embodiment is used for the purpose of mentioning by showing the example of the utility model
For being better understood to the utility model.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Fig. 2 shows the structural schematic diagrams of ac-dc conversion device provided by the embodiment of the utility model.The utility model
The ac-dc conversion device that embodiment provides may include: Multiple coil phase-shifting transformer 11 and tandem type rectifier 12.
Multiple coil phase-shifting transformer 11 includes a first winding 111 and N number of secondary winding 112.
Tandem type rectifier 12 includes N number of three phase rectifier unit 121.
I-th of secondary winding 112 and i-th of three phase rectifier unit 121 connect, 1≤i≤N.
The cathode of the DC output end of 1st three phase rectifier unit 121 and the direct current of n-th three phase rectifier unit 121 are defeated
The anode of outlet is as external connection interface.
The anode of the DC output end of j-th of three phase rectifier unit 121 and the direct current of+1 three phase rectifier unit 121 of jth
The cathode of output end connects, 1≤j≤N-1.
Wherein, shown in Fig. 2, be followed successively by from bottom to top the 1st secondary winding, the 2nd secondary winding ..., i-th two times
Winding ..., n-th secondary winding.It is followed successively by the 1st three phase rectifier unit, the 2nd three phase rectifier list from bottom to top
Member ..., i-th of three phase rectifier unit ..., n-th three phase rectifier unit.
It is understood that the 1st secondary winding 112 and the 1st three phase rectifier unit 121 connect, the 2nd secondary winding
112 and the 2nd three phase rectifier units 121 connect ... ..., and n-th secondary winding 112 and n-th three phase rectifier unit 121 connect
It connects.
It will also be appreciated that the anode of the DC output end of the 1st three phase rectifier unit 121 and the 2nd three phase rectifier
The cathode of the DC output end of unit 121 connects, the anode of the DC output end of the 2nd three phase rectifier unit 121 and the 3rd three
The cathode of the DC output end of commutating phase unit 121 connects ... ..., the DC output end of the N-1 three phase rectifier unit 121
Anode is connected with the cathode of the DC output end of n-th three phase rectifier unit 121.
Ac-dc conversion device provided by the embodiment of the utility model, can be by convert alternating current by tandem type reorganizer
For direct current.
Fig. 3 shows the structural schematic diagram of tandem type rectifier provided by the embodiment of the utility model.Three phase rectifier unit
121 may include: first diode D1, the second diode D2, third diode D3, the 4th diode D4, the 5th diode D5
With the 6th diode D6.
The connection of the cathode of the anode of first diode D1 and the second diode D2.
The cathode connection of the anode and the 4th diode D4 of third diode D3.
The cathode connection of the anode and the 6th diode D6 of 5th diode D5.
The cathode of the cathode of first diode D1, the cathode of third diode D3 and the 5th diode D5 connects, as three
The anode of the DC output end of commutating phase unit 121.
The anode of the anode of second diode D2, the anode of the 4th diode D4 and the 6th diode D6 connects, as three
The cathode of the DC output end of commutating phase unit 121.
In one embodiment of the utility model, the sun for the first diode D1 that i-th of three phase rectifier unit 121 includes
The common end of the cathode of pole and the second diode D2 connection is connected with the first of i-th of secondary winding 112.
The public affairs of the cathode connection of the anode and the 4th diode D4 of the third diode D3 that i-th of three phase rectifier unit includes
End is connected with the second of i-th of secondary winding 112 altogether.
The public affairs of the cathode connection of the anode and the 6th diode D6 of the 5th diode D5 that i-th of three phase rectifier unit includes
End is connected with the third of i-th of secondary winding 112 altogether.
In one embodiment of the utility model, the shifting of the phase shifting angle of k-th of secondary winding than -1 secondary winding of kth
Phase angle big 60 °/N, 2≤k≤N.
It is assumed that N is 8, then the phase shifting angle of k-th of secondary winding is 60 °/8=bigger than the phase shifting angle of -1 secondary winding of kth
7.5°.In the range of 360 °, phase shifting angle differs 7.5 °, then available rectification pulse number is 360 °/7.5 °=48.Also
It is to say, 12 DC output end of tandem type rectifier generates 48 pulse wave DC voltages, the alternating current warp that each secondary winding 112 exports
It crosses three phase rectifier unit 121 and is converted to 6 pulse wave DC voltages.Pulse number is more, can more effectively eliminate harmonic wave.
Ac-dc conversion device provided by the embodiment of the utility model, when the three phase rectifier unit that tandem type rectifier includes
When more, harmonic wave can be effectively eliminated.
Fig. 4 shows the structural schematic diagram of wind power generating set provided by the embodiment of the utility model.The utility model is real
The wind power generating set for applying example offer includes that wind energy conversion system 21, generator 22, wind electric converter 23 and the utility model embodiment mention
The ac-dc conversion device 24 of confession.
Wherein, generator 22, wind electric converter 23 and ac-dc conversion device 24 provided by the embodiment of the utility model according to
Secondary connection, the external connection interface and direct current current collection connection of ac-dc conversion device 24.
In one embodiment of the utility model, generator 22 includes: magneto alternator.
In one embodiment of the utility model, direct current collection electric line includes: positive direct-current bus and negative DC bus；
The cathode and negative DC bus of the DC output end of the 1st three phase rectifier unit in ac-dc conversion device 24 connect
It connects；
The anode of the DC output end of n-th three phase rectifier unit in ac-dc conversion device 24 connects with positive direct-current bus
It connects.
In one embodiment of the utility model, the input port of wind electric converter 23 and the output port of generator 22
Connection；The output port of wind electric converter 23 is connect with the first winding 111 in ac-dc conversion device 24.
The utility model embodiment also provides a kind of windfarm system.Windfarm system includes: that multiple groups the utility model is real
Wind power generating set, direct current collection electric line and the converter valve of example offer are provided；Multiple groups wind power generating set respectively with direct current collection electric wire
Road connection；Direct current collection electric line is also connect with converter valve, and converter valve is input to power grid for direct current to be converted to alternating current.
Fig. 5 shows the structural schematic diagram of windfarm system provided by the embodiment of the utility model.Wherein, shown in Fig. 5
Windfarm system includes M group wind power generating set, respectively the 1st group of wind power generating set ..., M group wind power generating set.
It is that mechanical energy inputs generator 22 that wind energy conversion system 21, which absorbs wind energy transformation,.It is defeated that mechanical energy is converted electric energy by generator 22
Enter wind electric converter 23.Wind electric converter 23 generates low-voltage AC and inputs ac-dc conversion provided by the embodiment of the utility model
Device 24.The low-voltage AC of input is converted to high voltage direct current by ac-dc conversion device 24, is output to direct current collection electric line
31, realize HVDC Transmission in wind power plant.High voltage direct current inputs converter valve 32, is converted to alternating current by converter valve 32
Pressure.Alternating voltage inputs power grid 34 by the alternating current that main transformer 33 is converted to suitable voltage class.
The windfarm system of the utility model embodiment can be effectively reduced based on direct current transportation compared to ac transmission
Line cost and the active consumption of route improve system stability.
In one embodiment of the utility model, it is assumed that wind electric converter 23 generates 690 volts of (V) low-voltage ACs, more
The first winding 111 of winding phase-shifting transformer 11 inputs 690V alternating current.Assuming that each of Multiple coil phase-shifting transformer 11 is secondary
Winding 112 exports 3250V alternating current, the then peak dc voltage that tandem type rectifier 112 theoretically exports are as follows: 3250*8*
1.414=36764V, it is contemplated that the DC voltage of impedance voltage drop, 12 reality output of tandem type rectifier can reach 32 kilovolts
(kV).Low-voltage AC electricity can be converted to high voltage low harmony wave direct current by ac-dc conversion device.Wind power plant is based on direct current
Power transmission mode transmission of electricity, can be effectively reduced line cost and the active consumption of route, improve system stability.And ac-dc conversion
Low-voltage AC electricity is converted to high voltage low harmony wave direct current by device, and can provide for wind power plant realization HVDC Transmission must
The voltage class support wanted.
Above description is only a specific implementation of the present invention.It should be understood that the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Various equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.
Claims (9)
1. a kind of ac-dc conversion device, which is characterized in that described device includes: Multiple coil phase-shifting transformer and tandem type rectification
Device；
The Multiple coil phase-shifting transformer includes a first winding and N number of secondary winding；
The tandem type rectifier includes N number of three phase rectifier unit；
I-th of secondary winding is connected with i-th of three phase rectifier unit, 1≤i≤N；
The anode of the DC output end of the cathode and n-th three phase rectifier unit of the DC output end of 1st three phase rectifier unit
As external connection interface；
The DC output end of the anode and+1 three phase rectifier unit of jth of the DC output end of j-th of three phase rectifier unit is born
Pole connection, 1≤j≤N-1.
2. the apparatus according to claim 1, which is characterized in that the three phase rectifier unit includes: first diode, second
Diode, third diode, the 4th diode, the 5th diode and the 6th diode；
The connection of the cathode of the anode of the first diode and the second diode；
The cathode connection of the anode and the 4th diode of the third diode；
The cathode connection of the anode and the 6th diode of 5th diode；
The cathode of the first diode, the third diode cathode connected with the cathode of the 5th diode, as
The anode of the DC output end of the three phase rectifier unit；
The anode of second diode, the 4th diode anode connected with the anode of the 6th diode, as
The cathode of the DC output end of the three phase rectifier unit.
3. the apparatus of claim 2, which is characterized in that
The common end of the cathode connection of the anode and the second diode of the first diode that i-th of three phase rectifier unit includes
It is connected with the first of i-th of secondary winding；
The common end of the cathode connection of the anode and the 4th diode of the third diode that i-th of three phase rectifier unit includes
It is connected with the second of i-th of secondary winding；
The common end of the cathode connection of the anode and the 6th diode of the 5th diode that i-th of three phase rectifier unit includes
It is connected with the third of i-th of secondary winding.
4. the apparatus according to claim 1, which is characterized in that the phase shifting angle of k-th of secondary winding it is more secondary than kth -1 around
The phase shifting angle big 60 °/N, 2≤k≤N of group.
5. a kind of wind power generating set, which is characterized in that the wind power generating set includes: wind energy conversion system and sequentially connected hair
Motor, wind electric converter and the described in any item ac-dc conversion devices of Claims 1-4；The ac-dc conversion device
External connection interface and direct current current collection connection.
6. wind power generating set according to claim 5, which is characterized in that the generator includes: permanent-magnet synchronous power generation
Machine.
7. wind power generating set according to claim 5, which is characterized in that the direct current collection electric line includes: positive direct-current
Bus and negative DC bus；
The cathode and the negative DC bus of the DC output end of the 1st three phase rectifier unit in the ac-dc conversion device
Connection；
Anode and the positive direct-current bus of the DC output end of n-th three phase rectifier unit in the ac-dc conversion device
Connection.
8. wind power generating set according to claim 5, which is characterized in that the input port of the wind electric converter and institute
State the output port connection of generator；In the output port of the wind electric converter and the ac-dc conversion device it is primary around
Group connection.
9. a kind of windfarm system, which is characterized in that the windfarm system includes: described in multiple groups any one of claim 5 to 8
Wind power generating set, direct current collection electric line and converter valve；
The multiple groups wind power generating set respectively with the direct current current collection connection；
The direct current collection electric line is also connect with the converter valve, and the converter valve is used to direct current being converted to alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930631.3U CN209072369U (en) | 2018-11-22 | 2018-11-22 | Ac-dc conversion device, wind power generating set and windfarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821930631.3U CN209072369U (en) | 2018-11-22 | 2018-11-22 | Ac-dc conversion device, wind power generating set and windfarm system |
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| Publication Number | Publication Date |
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| CN209072369U true CN209072369U (en) | 2019-07-05 |
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| CN201821930631.3U Active CN209072369U (en) | 2018-11-22 | 2018-11-22 | Ac-dc conversion device, wind power generating set and windfarm system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378985A (en) * | 2018-11-22 | 2019-02-22 | 北京金风科创风电设备有限公司 | Alternating current-direct current conversion device, wind generating set and wind power plant system |
-
2018
- 2018-11-22 CN CN201821930631.3U patent/CN209072369U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378985A (en) * | 2018-11-22 | 2019-02-22 | 北京金风科创风电设备有限公司 | Alternating current-direct current conversion device, wind generating set and wind power plant system |
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