CN205566134U - Converter system and wind generating set's conversion system - Google Patents
Converter system and wind generating set's conversion system Download PDFInfo
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- CN205566134U CN205566134U CN201620349529.9U CN201620349529U CN205566134U CN 205566134 U CN205566134 U CN 205566134U CN 201620349529 U CN201620349529 U CN 201620349529U CN 205566134 U CN205566134 U CN 205566134U
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 230000005611 electricity Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
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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 provides a converter system and wind generating set's conversion system, this converter system include converter and wave filter, the converter includes at least two sets of three -phase converter module, the wave filter includes that the three -phase absorbs module and at least two sets of three -phase reactor module, the direct current side of at least two sets of three -phase converter modules is parallelly connected, the interchange of at least two sets of three -phase converter modules side establish ties respectively after a set of three -phase reactor module that corresponds with the three -phase absorbs one side of module and connects. Adopt the technical scheme of the utility model, the converter system adopts the parallelly connected three -phase converter module of at least two direct currents side to increase the capacity of converter to it is parallelly connected with one side of three -phase absorption module again after the three -phase reactor module is connected to the interchange side of converter, reduce the DUDT value that the converter exchanged the end with effective, thereby improve the interior unbalanced problem of IGBT current distribution of three -phase converter module, increase IGBT's life.
Description
Technical field
This utility model relates to electric and electronic technical field, particularly relates to a kind of converter system and wind
The converter system of power generator group.
Background technology
In inverter application process, for the problem of inverter off-capacity, need to redesign
The structure of inverter, by increasing Insulated Gate Bipolar transistor (Insulated Gate Bipolar
Transistor, be called for short IGBT) capacity increase inverter capacity, increase IGBT appearance
During amount, easily occur that IGBT electric current distributes unbalanced problem, thus affect IGBT
Service life.
Utility model content
Embodiment of the present utility model provides a kind of converter system and the unsteady flow system of wind power generating set
System, improves IGBT electric current and distributes unbalanced problem, increase the service life of IGBT.
For reaching above-mentioned purpose, according to one side of the present utility model, it is provided that a kind of converter system,
Including current transformer and wave filter, described current transformer includes at least two group 3-phase power converter modules, described
Wave filter includes three-phase absorption module and at least two group three-phase reactor modules, described at least two groups three
The DC side parallel of phase converter module, the AC of described at least two group 3-phase power converter modules divides
After three-phase reactor module described in a group of correspondence of not connecting, the side with described three-phase absorption module connects
Connect.
Further, the arbitrary phase in described three-phase reactor module includes common mode reactor, differential mode
The common mode reactor of reactor or series connection and differential mode reactor.
Further, described common mode reactor is magnet ring.
Further, the arbitrary phase in described three-phase absorption module includes the first electric capacity or string respectively
First electric capacity of connection connection and the first resistance.
Further, the opposite side of described three-phase absorption module is directly grounded；Or, described unsteady flow
Device system also includes the second electric capacity, and the opposite side of described three-phase absorption module passes through described second electric capacity
Ground connection；Or, described converter system also includes the second electric capacity and the second resistance, described three attracting
Receive the opposite side of module by described second electric capacity being connected in series and the second resistance eutral grounding.
Further, the AC of described 3-phase power converter module passes through the first long cable with corresponding
One group described in three-phase reactor module connect；And/or, the side of described three-phase absorption module
Three-phase alternating current equipment is connected by the second long cable.
Further, described 3-phase power converter module is three-phase inverter, described three-phase alternating current equipment
For threephase load；Or, described 3-phase power converter module is three-phase rectifier, described three-phase alternating current
Equipment is threephase alternator.
Further, described converter system also includes the 3rd electric capacity, described 3-phase power converter module
DC side parallel described in the 3rd electric capacity.
According to another aspect of the present utility model, also provide for the converter system of a kind of wind power generating set,
Converter system in technique scheme is set.
Further, the converter system of wind power generating set is arranged on the converter cabinet of wind power generating set
In.
In the converter system of this utility model offer and the converter system of wind power generating set, unsteady flow
Device system uses the 3-phase power converter module of at least two DC side parallel to increase the appearance of current transformer
Amount, and the AC of current transformer connect after three-phase reactor module again with the one of three-phase absorption module
Side is in parallel, effectively to reduce the DU/DT value of current transformer exchange end, thus improves 3-phase power converter mould
In block, IGBT electric current distributes unbalanced problem, increases the service life of IGBT.
Further, the three-phase alternating current equipment that the side of the three-phase absorption module of wave filter connects is three
During phase load, can effectively reduce the DU/DT value of threephase load input, play the work of protection load
With.
Accompanying drawing explanation
Fig. 1 illustrates the structural representation of converter system in this utility model embodiment one；
Fig. 2 illustrates the structural representation of converter system in this utility model embodiment two；
Fig. 3 illustrates the structural representation of converter system in this utility model embodiment three；
Fig. 4 illustrates the structural representation of converter system in this utility model embodiment four；
Fig. 5 illustrates the structural representation of converter system in this utility model embodiment five；
Fig. 6 illustrates the structural representation of converter system in this utility model embodiment six；
Fig. 7 illustrates the structural representation of converter system in this utility model embodiment seven；
Fig. 8 illustrates the structural representation of converter system in this utility model embodiment eight.
Description of reference numerals:
1, the 3rd electric capacity；2,3,3-phase power converter module；4, wave filter；5, common mode reactance
Device；6, differential mode reactor；7, the first resistance；8, the first electric capacity；9, the second electric capacity；10、
Second resistance；11, the first long cable；12, three-phase alternating current equipment；13, the second long cable.
Detailed description of the invention
Below in conjunction with the accompanying drawings to the converter system of this utility model embodiment and wind power generating set
Converter system is described in detail.
Embodiment one
See Fig. 1 to Fig. 8, the converter system in this utility model embodiment include current transformer and
Wave filter 4, current transformer includes at least two group 3-phase power converter modules, and wave filter 4 includes that three is attracting
Receive module and at least two group three-phase reactor modules, the DC side of at least two group 3-phase power converter modules
Parallel connection, the AC of at least two group 3-phase power converter modules connect respectively correspondence one group of three-phase reactor
After device module, the side with three-phase absorption module is connected.
Use the 3-phase power converter module of multiple DC side parallel, it is simple to the capacity of extension current transformer,
Realize modular design.The structural representation of converter system as shown in Figures 1 to 8 illustrates
3-phase power converter module 2 and 3-phase power converter module 3, the two 3-phase power converter module only makees
Exemplary illustration, and the technical solution of the utility model is not restricted.
3-phase power converter module in this utility model embodiment can be three-phase inverter module or
Three-phase converter module.When 3-phase power converter module is three-phase inverter, three-phase alternating current equipment 12
For threephase load；When 3-phase power converter module is three-phase rectifier, three-phase alternating current equipment 12 is three
Cross streams electromotor.Wherein, being three-phase inverter module for 3-phase power converter module, three intersect
Flow device 12 is the situation of threephase load, uses the technical scheme of the present embodiment, reduces three-phase inversion
The DU/DT value of device exchange end, effectively protects threephase load.
Wherein, the phase in three-phase reactor module be common mode reactor 5, differential mode reactor 6 or
The common mode reactor 5 of person's series connection and differential mode reactor 6.The Main Function of common mode reactor 5 is to press down
Common mode disturbances in circuit processed, the Main Function of differential mode reactor 6 is that the differential mode in suppression circuit is done
Disturb.Specifically, common mode reactor 5 can be magnet ring, and differential mode reactor 6 can be common exchange
Filter reactor.When 3-phase power converter module is three-phase inverter, the IGBT of three-phase inverter
Use identical control signal, i.e. the pwm pulse signal of IGBT is identical, uses magnet ring and exchanges
The ac output end of three-phase inverter module, as isolating device, is isolated by filter reactor,
It is possible to prevent the IGBT electric current caused owing to switch time is inconsistent inconsistent, improves inverter
Electric current distribute unbalanced problem, decrease and cause because the electric current distribution of inverter is unbalanced
The problem that service life reduces.
In this utility model embodiment, wave filter 4 can be arranged near current transformer, it is also possible to
It is arranged between current transformer and three-phase alternating current equipment 12 and distance both of which has a segment distance, because of
This, the AC of 3-phase power converter module is by busbar with corresponding one group of three-phase reactor module even
Connecing, as shown in Figure 8, the AC of 3-phase power converter module can also pass through the first long cable 11
Connect with one group of corresponding three-phase reactor module.
Fig. 1 illustrates the structural representation of this utility model embodiment converter system.See Fig. 1,
3-phase power converter module 2 and the DC side parallel of 3-phase power converter module 3, often organize 3-phase power converter
The side correspondence of the AC of module and one group of corresponding three-phase reactor module connects, three-phase reactor
The opposite side of device module same is connected with the one of corresponding three-phase absorption module after being connected.Wherein
Each phase of three-phase reactor module includes common mode reactor 5 and the differential mode reactor 6 of series connection.
Each phase of three-phase absorption module includes the first electric capacity 8 and the first resistance 7 being connected in series.
Wherein the first resistance 7 is directly connected to three-phase reactor module, the first electric capacity 8 being connected in series with
First resistance 7, can be to the inductive load self induction electromotive force when current transients as absorbing circuit
Carry out the impact because of DU/DT, device caused in clamper, and suppression circuit.
First resistance 7 is filter resistance, and the first electric capacity 8 is differential mode filter capacitor.Three-phase absorbs mould
Block is connected with three-phase alternating current equipment 12 by the second long cable 13, and the first resistance 7 can conduct
The impedance matching element of long cable plays filter action.Differential mode filter capacitor is mainly in circuit
Differential mode interference plays inhibitory action.
Additionally, converter system also includes the second electric capacity 9 and the second resistance 10 being connected in series, three
The opposite side of phase absorption module is by the second electric capacity 9 and the second resistance 10 ground connection being connected in series.The
Two electric capacity 9 are common mode filtering electric capacity, and directly grounded second resistance 10 is common mode filtering resistance, main
Common mode disturbances in circuit is played inhibitory action.The opposite side of three-phase absorption module can also be straight
Ground connection.
Converter system also includes the 3rd electric capacity 1, the DC side parallel the 3rd of 3-phase power converter module
Electric capacity 1.3rd electric capacity 1 is connected in parallel on the straight of 3-phase power converter module 2 with 3-phase power converter module 2
The both positive and negative polarity of stream end.3rd electric capacity 1 can effectively absorb from the stray inductance within IGBT
Discharge high peak voltage pulse in the high speed turn-off moment, play protection 3-phase power converter module
Effect.
In utility model embodiment, the side of three-phase absorption module is by the second long cable 13 even
Connect three-phase alternating current equipment 12.The length of the first long cable 11 and the second long cable 13 can reach
To tens meters of rice the most thousands of.
Using the technical scheme of above example, converter system uses at least two DC side parallel
3-phase power converter module increase the capacity of current transformer, and connect three-phase at the AC of current transformer
After reactor module in parallel with the side of three-phase absorption module again, effectively to reduce current transformer exchange end
DU/DT value, thus in improving 3-phase power converter module IGBT electric current distribute unbalanced problem,
Increase the service life of IGBT.
Embodiment two
Seeing Fig. 2, in this utility model embodiment, each phase of three-phase reactor module includes
The common mode reactor 5 of series connection and differential mode reactor 6, each phase of three-phase absorption module includes series connection
The first electric capacity 8 and the first resistance 7 connected.Being with the difference of embodiment one, three is attracting
Receiving module side to be connected with three-phase reactor module, the three of opposite side are earth-free after being connected.
Embodiment three
Seeing Fig. 3, in this utility model embodiment, each phase of three-phase absorption module includes string
The first electric capacity 8 and the first resistance 7 that connection connects.It is with the difference of embodiment one, described
Each phase of three-phase reactor module includes differential mode reactor 6；The opposite side of three-phase absorption module leads to
Cross the second electric capacity 9 ground connection.
Embodiment four
See Fig. 4, in this utility model embodiment, be with the difference of embodiment one,
Each phase of described three-phase reactor module includes differential mode reactor 6.Three-phase absorption module side with
Three-phase reactor module connects, and the three of opposite side are earth-free after being connected.
Embodiment five
Seeing Fig. 5, in this utility model embodiment, each phase of three-phase absorption module includes string
The first electric capacity 8 and the first resistance 7 that connection connects, the first resistance 7 is direct and three-phase reactor module
Connect；Converter system also includes the second electric capacity 9 and the second resistance 10 being connected in series, and three is attracting
Receive the opposite side of module by the second electric capacity 9 and the second resistance 10 ground connection being connected in series.With enforcement
The difference of example one is, each phase of three-phase reactor module includes differential mode reactor 6.
Embodiment six
Seeing Fig. 6, in this utility model embodiment, each phase of three-phase reactor module includes
Differential mode reactor 6, each phase of three-phase absorption module includes the first electric capacity 8 and being connected in series
One resistance 7, the opposite side of three-phase absorption module is by the second electric capacity 9 and the second electricity being connected in series
Hinder 10 ground connection.Being with the difference of embodiment five, the first electric capacity 8 is directly and three-phase reactor
Module connects.
Embodiment seven
Seeing Fig. 7, in this utility model embodiment, each phase of three-phase absorption module includes string
The first electric capacity 8 and the first resistance 7 that connection connects.Three-phase absorption module side and three-phase reactor mould
Block connects, and is with the difference of embodiment one, and each phase of three-phase reactor module only includes
Common mode reactor 5, the three of three-phase absorption module opposite side are connected.
Embodiment eight
See Fig. 8, in this utility model embodiment, be with the difference of embodiment one,
Each phase of three-phase reactor module only includes common mode reactor 5, each phase of three-phase absorption module
Only including the first electric capacity 8, three-phase absorption module side is connected with three-phase reactor module, opposite side
Three be connected.
This utility model embodiment also differ in that with embodiment one, real at this utility model
Execute the three-phase reactor module in example distant with 3-phase power converter module, the most in this application
Three-phase reactor module and 3-phase power converter module be connected by the first long cable 11.
Embodiment nine
The present embodiment provides the converter system of a kind of wind power generating set, arranges in above example
Converter system.
Further, the converter system of wind power generating set is arranged on the converter cabinet of wind power generating set
In.
Use the technical scheme of the present embodiment, the current transformer system in the converter system of wind power generating set
System uses the 3-phase power converter module of at least two DC side parallel to increase the capacity of current transformer, and
AC at current transformer connects after three-phase reactor module with the side of three-phase absorption module also again
Connection, effectively to reduce the DU/DT value of current transformer exchange end, thus improves in 3-phase power converter module
IGBT electric current distributes unbalanced problem, increases the service life of IGBT.
The above, detailed description of the invention the most of the present utility model, but protection of the present utility model
Scope is not limited thereto, and any those familiar with the art discloses at this utility model
Technical scope in, can readily occur in change or replace, all should contain in protection of the present utility model
Within the scope of.Therefore, protection domain of the present utility model should be with described scope of the claims
It is as the criterion.
Claims (10)
1. a converter system, it is characterised in that include current transformer and wave filter (4), described
Current transformer includes at least two group 3-phase power converter modules, and described wave filter (4) includes that three-phase absorbs mould
Block and at least two group three-phase reactor modules, the DC side of described at least two group 3-phase power converter modules
Parallel connection, the AC of described at least two group 3-phase power converter modules is connected described in corresponding one group respectively
After three-phase reactor module, the side with described three-phase absorption module is connected.
Converter system the most according to claim 1, it is characterised in that described three-phase reactor
Arbitrary phase in device module includes common mode reactor (5), differential mode reactor (6) or series connection
Common mode reactor (5) and differential mode reactor (6).
Converter system the most according to claim 2, it is characterised in that described common mode reactance
Device (5) is magnet ring.
Converter system the most according to claim 1, it is characterised in that described three-phase absorbs
Arbitrary phase in module includes the first electric capacity (8) or the first electric capacity (8) of being connected in series and the
One resistance (7).
Converter system the most according to claim 4, it is characterised in that
The opposite side of described three-phase absorption module is directly grounded；Or,
Described converter system also includes the second electric capacity (9), the opposite side of described three-phase absorption module
By described second electric capacity (9) ground connection；Or,
Described converter system also includes the second electric capacity (9) and the second resistance (10), described three-phase
The opposite side of absorption module is by described second electric capacity (9) being connected in series and the second resistance (10)
Ground connection.
Converter system the most according to claim 1, it is characterised in that
The AC of described 3-phase power converter module passes through the first long cable (11) and corresponding
Organize described three-phase reactor module to connect；And/or,
The side of described three-phase absorption module connects three-phase alternating current by the second long cable (13) and sets
Standby (12).
Converter system the most according to claim 6, it is characterised in that
Described 3-phase power converter module is three-phase inverter, and described three-phase alternating current equipment (12) is three
Phase load；Or,
Described 3-phase power converter module is three-phase rectifier, and described three-phase alternating current equipment (12) is three
Cross streams electromotor.
Converter system the most according to claim 1, it is characterised in that described current transformer system
System also includes the 3rd electric capacity (1), the 3rd electricity described in the DC side parallel of described 3-phase power converter module
Hold (1).
9. the converter system of a wind power generating set, it is characterised in that arrange such as claim 1
To the converter system described in 8 any one.
The converter system of wind power generating set the most according to claim 9, it is characterised in that
The converter system of described wind power generating set is arranged in the converter cabinet of wind power generating set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620349529.9U CN205566134U (en) | 2016-04-22 | 2016-04-22 | Converter system and wind generating set's conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620349529.9U CN205566134U (en) | 2016-04-22 | 2016-04-22 | Converter system and wind generating set's conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205566134U true CN205566134U (en) | 2016-09-07 |
Family
ID=56806221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620349529.9U Active CN205566134U (en) | 2016-04-22 | 2016-04-22 | Converter system and wind generating set's conversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205566134U (en) |
-
2016
- 2016-04-22 CN CN201620349529.9U patent/CN205566134U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Gao Rui Inventor after: Shi Shaoqun Inventor before: Gao Rui |
|
| COR | Change of bibliographic data |