CN106787459B - Wind power generator - Google Patents
Wind power generator Download PDFInfo
- Publication number
- CN106787459B CN106787459B CN201611270846.2A CN201611270846A CN106787459B CN 106787459 B CN106787459 B CN 106787459B CN 201611270846 A CN201611270846 A CN 201611270846A CN 106787459 B CN106787459 B CN 106787459B
- Authority
- CN
- China
- Prior art keywords
- winding
- group
- stator
- wind
- stator modules
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 85
- 238000004804 winding Methods 0.000 claims description 180
- 230000009466 transformation Effects 0.000 claims description 65
- 230000008878 coupling Effects 0.000 claims description 24
- 238000010168 coupling process Methods 0.000 claims description 24
- 238000005859 coupling reaction Methods 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 12
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 26
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical group [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H02K11/046—
Abstract
The invention discloses a wind driven generator, relates to the field of wind power generation, and solves the problem that high-frequency circulation in the wind driven generator is large to have adverse effect on stable operation of the wind driven generator. The wind power generator comprises: at least one group of stator modules, wherein each group of stator modules comprises two symmetrical stator modules; each group of stator modules is connected with two parallel electric transmission links, and each electric transmission link comprises an inverter group; at least one transformer reactance module, each transformer reactance module connected with at least one electrical drive link, the transformer reactance modules configured to have a reactance such that a circuit resonant frequency of the parallel converter groups avoids a switching frequency of the converters in the converter groups. The invention can reduce the high-frequency circulation of the parallel converters and reduce the adverse effect on the stable operation of the wind driven generator.
Description
Technical field
The present invention relates to wind power generation field more particularly to a kind of wind-driven generators.
Background technique
Due to the shortage of resource, sustainable resource is applied in more and more fields.Such as by wind energy, solar energy
It is electric energy etc. sustainable resource conversion.In wind power generation field, electric energy is converted wind energy by wind generator system, will be turned
Change obtained electric energy by electrical grid transmission to each machine for needing electricity consumption.
Generator in wind-driven generator includes stator and rotor, and stator is obtained conversion by Electrified Transmission link
Electric energy is transferred to power grid.It include the current transformer of multiple parallel connections in Electrified Transmission link, due to the PWM between each current transformer
The difference of the physical device of (Pulse Width Modulation, pulse width modulation) driving signal, so that multiple current transformers
Between switch time it is inconsistent.Leading to the carrier wave of current transformer, there are certain phase differences, so that current transformer in parallel exists
There are higher high frequency circulating currents between parallel connection point and DC bus, have adverse effect to the stable operation of wind-driven generator.
Summary of the invention
The embodiment of the invention provides a kind of wind-driven generator, current transformer in parallel (such as rectifier and/or inverse can reduce
Become device) high frequency circulating currents, reduce the adverse effect to the stable operation of wind-driven generator.
The embodiment of the invention provides a kind of wind-driven generators, comprising: at least one set of stator modules, every group of stator modules packet
Include two symmetrical stator modules；Electrified Transmission link, every group of stator modules are connected with two Electrified Transmission links in parallel, often
Electrified Transmission link includes current transformer group；At least one transformation reactance module, each transformation reactance module and at least one
Electrified Transmission link connection, transformation reactance module is configured with so that the circuit resonant frequencies of current transformer group in parallel are avoided
The reactance of converter switches frequency in current transformer group.
Further, when transformation reactance module is with two Electrified Transmission link connections in parallel, transformation reactance module packet
The double Split winding transformers of weak coupling are included, and two output ends of two Electrified Transmission links in parallel are double with weak coupling respectively
Two windings of Split winding transformer low-pressure side are correspondingly connected with.
Further, when transformation reactance module and two Electrified Transmission link connections, transformation reactance module includes reactance
Device group and three-winding transformer, and two output ends of two Electrified Transmission links in parallel are respectively connected with a reactor group,
The output end of two reactor groups is correspondingly connected with two windings of three-winding transformer low-pressure side respectively.
Further, when transformation reactance module and N Electrified Transmission link connection, N is the even number greater than 2, transformation electricity
Anti- module includes weak coupling N Split winding transformer, and N number of output end of N Electrified Transmission link divides with weak coupling N respectively
The N number of winding for splitting winding transformer low-pressure side is correspondingly connected with.
Further, when transformation reactance module and N Electrified Transmission link connection, N is the even number greater than 2, the change
Pressure reactance module includes reactor group and (N+1) winding transformer, and N number of output of N Electrified Transmission link of the parallel connection
End is respectively connected with a reactor group, the output end of N number of reactor group respectively with (N+1) winding transformer low-pressure side it is N number of around
Group is correspondingly connected with.
Specifically, current transformer group includes the rectifier connecting with stator modules and the inverter that connect with rectifier.
Specifically, each stator modules include a set of or a set of above stator winding.
Specifically, each stator modules include two sets of stator winding.
Further, 30 ° or 180 ° of phase phase difference of the identical perhaps phase phase difference of phase between two sets of stator winding
Specifically, in a set of stator winding and another stator modules in stator modules in one group of stator modules
A set of stator winding connect with the current transformer group in an Electrified Transmission link, a stator mould in one group of stator modules
Another set of stator winding in block and the another set of stator winding in another stator modules with another Electrified Transmission link
In current transformer group connection.
Further, identical as the phase of two sets of stator winding of same Electrified Transmission link connection.
The embodiment of the invention provides a kind of wind-driven generator, which includes at least one set of stator modules, fixed
The Electrified Transmission link and at least one transformation reactance module of submodule connection, two of every group of stator modules connection parallel connection
Electrified Transmission link, every Electrified Transmission circuit include current transformer group, each transformation reactance module and at least one Electrified Transmission
Link connection, transformation reactance module is configured with so that the circuit resonant frequencies of current transformer group in parallel avoid current transformer group
In converter switches frequency reactance.By the way that the reactance of transformation reactance module is arranged, so that the change in parallel of wind-driven generator
The circuit resonant frequencies of stream device group avoid converter switches frequency in parallel, avoid the circuit resonant frequencies and change of wind-driven generator
The switching frequency for flowing device is equal, to avoid the occurrence of maximum high frequency circulating currents, and reduces current transformer in parallel in parallel connection point and straight
The high frequency circulating currents between bus are flowed, the adverse effect of the stable operation to wind-driven generator is reduced.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein,
The same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 a is the schematic diagram that the wind-driven generator that one embodiment of the invention provides includes one group of stator modules；
Fig. 1 b is the schematic diagram that the wind-driven generator that one embodiment of the invention provides includes two groups of stator modules；
Fig. 2 is the structural schematic diagram for the wind-driven generator that one embodiment of the invention provides；
Fig. 3 is the structural schematic diagram of the wind-driven generator in an example of another embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the wind-driven generator in another example of another embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the wind-driven generator in the another example of another embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the wind-driven generator in another example of another embodiment of the present invention；
Fig. 7 is the circuit diagram of the inverter parallel in the embodiment of the present invention；
Fig. 8 a is one of the equivalent circuit diagram of two inverter parallels in Fig. 7；
Fig. 8 b is two of the equivalent circuit diagram of two inverter parallels in Fig. 7；
Fig. 8 c is three of the equivalent circuit diagram of two inverter parallels in Fig. 7；
Fig. 8 d is four of the equivalent circuit diagram of two inverter parallels in Fig. 7；
Fig. 9 is exchange steady-state equivalent circuit diagram corresponding with Fig. 8 c.
Wherein, G1, G2, G3, G4- stator modules；A1, A2, A3, A4- rectifier；B1, B2, B3, B4- inverter；10- electricity
Gas drive chain；11- transformation reactance module；The double Split winding transformers of 12- weak coupling；13- reactor；14- three winding transformation
Device；15- weak coupling quadripartion winding transformer；16- five-winding transformer.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
One embodiment of the invention provides a kind of wind-driven generator, the wind-driven generator include at least one set of stator modules,
Electrified Transmission link and at least one transformation reactance module.Wherein, every group of stator modules include two symmetrical stator moulds
Block.For example, Fig. 1 a is the schematic diagram that the wind-driven generator that one embodiment of the invention provides includes one group of stator modules, such as Fig. 1 a institute
Show, wind-driven generator includes stator modules G1 and G2, and stator modules G1 and G2 can be the shape of annulus section, stator modules G1 and G2
It is combined into circular stator.Alternatively, it includes two groups of stator modules that Fig. 1 b, which is the wind-driven generator that one embodiment of the invention provides,
Schematic diagram, as shown in Figure 1 b, wind-driven generator include stator modules G1, G2, G3 and G4, and stator modules G1 and G3 are symmetrical two
A stator modules are one group of stator modules, and it is one group of stator modules that stator modules G2 and G4, which are symmetrical two stator modules,
Stator modules G1, G2, G3 and G4 can be the shape of annulus section, and stator modules G1, G2, G3 and G4 are combined into circular stator.Fig. 2
For the structural schematic diagram for the wind-driven generator that one embodiment of the invention provides, as shown in Fig. 2, every group of stator modules are connected with parallel connection
Two Electrified Transmission links 10, every Electrified Transmission link 10 include current transformer group, specifically, current transformer group include one
Or multiple current transformers, wherein current transformer can be rectifier, or inverter.Each transformation reactance module 11 at least
One Electrified Transmission link 10 connects, that is to say, that each transformation reactance module 11 can only with an Electrified Transmission link 10
Connection, each transformation reactance module 11 can also be connect with a plurality of Electrified Transmission link 10.Above-mentioned transformation reactance module 11 has
Transformation function is configured with so that the current transformer that the circuit resonant frequencies of current transformer group in parallel are avoided in current transformer group is opened
Close the reactance of frequency.
When equal with the resonance frequency of the circuit of wind-driven generator due to the switching frequency for the current transformer being connected in parallel, generate
High frequency circulating currents it is maximum.It, can after being calculated according to parameter according to the available parameter of the structure of wind-power electricity generation in the prior art
The corresponding reactance of current transformer group circuit resonant frequencies in parallel when making the maximum of the high frequency circulating currents between current transformer to learn, passes through
The reactance of transformation reactance module is set, and the circuit resonant frequencies of current transformer group in parallel is made to avoid the unsteady flow in current transformer group
Device switching frequency, to reduce the high frequency circulating currents between current transformer.For example, current transformer group in parallel in wind-driven generator is calculated
When generating maximum high frequency circulating currents, the reactance of the circuit of current transformer group in parallel is in 10 μ H (microhenry)~20 μ H or so, then can
To configure the reactance that transformation reactance module has mH rank, the circuit resonance frequency of the current transformer group in parallel of wind-driven generator is avoided
Rate is equal with converter switches frequency, and make the current transformer group in parallel of the wind-driven generator configured with transformation reactance module
Circuit resonant frequencies are far from converter switches frequency.
The embodiment of the invention provides a kind of wind-driven generator, which includes at least one set of stator modules, fixed
The Electrified Transmission link 10 and at least one transformation reactance module 11 of submodule connection, every group of stator modules connect in parallel
Two Electrified Transmission links 10, every Electrified Transmission link include current transformer group, each transformation reactance module 11 and at least one
Electrified Transmission link 10 connects, and transformation reactance module 11 is configured with the circuit resonant frequencies so that current transformer group in parallel
The reactance for avoiding the converter switches frequency in current transformer group, the circuit for avoiding the current transformer group in parallel of wind-driven generator are humorous
Vibration frequency is equal with converter switches frequency, to avoid the occurrence of maximum high frequency circulating currents, can reduce compared with the existing technology
The high frequency circulating currents of current transformer in parallel between point in parallel and DC bus, reduce the bad shadow of the stable operation to wind-driven generator
It rings.The reactance that transformation reactance module 11, which is arranged, to be had makes the circuit resonant frequencies of current transformer group in parallel as far as possible far from current transformer
The reactance of the switching frequency of current transformer in group, and further decrease the height of current transformer in parallel between point in parallel and DC bus
Frequency circulation.
It should be noted that above-mentioned each stator modules include a set of or a set of above stator winding.Wind-driven generator
In transformation reactance module 11 there are many structure, will be illustrated below with each stator modules include two sets of stator winding
The various structures of the transformation reactance module 11 in wind-driven generator are stated, the current transformer group in wind-driven generator may include and stator mould
The rectifier of block connection, and the inverter being connect with rectifier.Rectifier is for converting alternating current to direct current, inverter
For direct current to be converted to alternating current.
Structure one: when transformation reactance module 11 is connect with two Electrified Transmission links 10 in parallel, transformation reactance module
11 include the double Split winding transformers 12 of weak coupling, and two output ends of two Electrified Transmission links 10 in parallel respectively with
Two low pressure windings of the double Split winding transformers 12 of weak coupling are correspondingly connected with.In a stator modules in one group of stator modules
A set of stator winding and another stator modules in a set of stator winding with the unsteady flow in an Electrified Transmission link 10
The connection of device group, another set of stator winding in a stator modules in one group of stator modules with it is another in another stator modules
A set of stator winding is connect with the current transformer group in another Electrified Transmission link 10.Fig. 3 is another embodiment of the present invention
The structural schematic diagram of wind-driven generator in one example.As shown in figure 3, wind-driven generator include stator modules G1, G2, G3 and
G4, wherein stator modules G1 and G3 are symmetrical, and stator modules G2 and G4 is symmetrical.Stator modules G1 and G3 are connected with two electricity in parallel
Gas drive chain 10, stator modules G2 and G4 are connected with another two Electrified Transmission links 10 in parallel.Each transformation reactance module
11 connect with two Electrified Transmission links 10 in parallel.Specifically, a set of stator winding and stator modules in stator modules G1
A set of stator winding in G3 is connect with rectifier A1, in the another set of stator winding and stator modules G3 in stator modules G1
Another set of stator winding is connect with rectifier A2.Similarly, in a set of stator winding and stator modules G4 in stator modules G2
A set of stator winding is connect with rectifier A3, another set of in the another set of stator winding and stator modules G4 in stator modules G2
Stator winding is connect with rectifier A4.Rectifier A1, A2, A3 and A4 are correspondingly connected with inverter B1, B2, B3, B4 respectively.Relatively
In stator modules G1 and G3, rectifier A1 and A2 are in parallel, and inverter B1, B2 are in parallel.Relative to stator modules G2 and G4, rectifier
A3 and A4 is in parallel, and inverter B3, B4 are in parallel.Inverter B1, B2 two low pressure with a double Split winding transformers 12 respectively
Winding is correspondingly connected with, and inverter B3, B4 are correspondingly connected with two low pressure windings of another double Split winding transformer 12 respectively.
The high-voltage winding output of the double Split winding transformers 12 of two weak couplings is passed through power grid.Transformation reactance module 11 is double points of weak coupling
Winding transformer 12 is split, the double Split winding transformers 12 of each weak coupling have a high-voltage winding and two low pressure windings.It is weak
Couple two windings of secondary side (i.e. two of the low-pressure side of the double Split winding transformers 12 of weak coupling of double Split winding transformers 12
A winding) between reactance it is bigger, enable to the circuit resonant frequencies of current transformer group in parallel to avoid the change in current transformer group
Flow device switching frequency.
Structure two: when transformation reactance module 11 is connect with two Electrified Transmission links 10, transformation reactance module 11 includes
Reactor group and three-winding transformer 14, and two output ends of two Electrified Transmission links 10 in parallel are respectively connected with an electricity
Anti- device group, the output end of two reactor groups respectively with three-winding transformer 14 secondary side, two winding (i.e. three-winding transformers
Two windings of 14 low-pressure sides) it is correspondingly connected with.Reactor group includes at least one reactor.Wherein, three-winding transformer 14
Reactance can be less than or equal to high frequency circulating currents reactance threshold value, can also be greater than high frequency circulating currents reactance threshold value.High frequency circulating currents reactance threshold value
The numerical value of biggish high frequency circulating currents is generated for the circuit that the current transformer in current transformer group in parallel is formed.If three-winding transformer 14
Reactance is less than or equal to high frequency circulating currents reactance threshold value between two windings of secondary side, then the three-winding transformer 14 is applied individually to any transformation
When reactance module 11, the circuit resonant frequencies for the circuit that the current transformer in current transformer group in parallel is formed and the switch frequency of current transformer
Rate is equal or close, generates maximum or biggish high frequency circulating currents.If reactance is big between three-winding transformer 14 secondary side, two windings
In high frequency circulating currents reactance threshold value, then when the three-winding transformer 14 is applied individually to any transformation reactance module 11, current transformer in parallel
The circuit resonant frequencies for the circuit that current transformer in group is formed avoid the switching frequency of current transformer, will not generate maximum high frequency ring
Stream.If reactance is less than or equal to high frequency circulating currents reactance threshold value between three-winding transformer 14 secondary side, two windings, closed by setting
The reactor group of suitable reactance, so that the reactor group that is arranged in transformation reactance module 11 and three-winding transformer 14 is total equivalent
Reactance is greater than high frequency circulating currents reactance threshold value, the circuit resonance for the circuit for enabling to the current transformer in current transformer group in parallel to be formed
Frequency avoids the switching frequency of current transformer, to reduce the high frequency circulating currents in current transformer group in parallel in wind-driven generator.If three
Reactance is greater than high frequency circulating currents reactance threshold value, the then reactance in transformation reactance module 11 between winding transformer 14 secondary side, two windings
The circuit resonant frequencies for the circuit that device group can be such that the current transformer in current transformer group in parallel is formed are far from the switch of current transformer frequency
Rate, to further lower the high frequency circulating currents in current transformer group in parallel in wind-driven generator.
It is a set of in a set of stator winding and another stator modules in a stator modules in one group of stator modules
Stator winding is connect with the current transformer group in an Electrified Transmission link 10, in a stator modules in one group of stator modules
Another set of stator winding and another stator modules in another set of stator winding and in another Electrified Transmission link 10
Current transformer group connection.Fig. 4 is the structural schematic diagram of the wind-driven generator in another example of another embodiment of the present invention.Such as
Shown in Fig. 4, wind-driven generator includes stator modules G1, G2, G3 and G4, and wherein stator modules G1 and G3 are symmetrical, stator modules G2
It is symmetrical with G4.Stator modules G1 and G3 are connected with two Electrified Transmission links 10 in parallel, and stator modules G2 and G4 are connected with simultaneously
Another two Electrified Transmission links 10 of connection.Each transformation reactance module 11 is connect with two Electrified Transmission links 10 in parallel.Tool
Body, a set of stator winding in a set of stator winding and stator modules G3 in stator modules G1 is connect with rectifier A1, fixed
The another set of stator winding in another set of stator winding and stator modules G3 in submodule G1 is connect with rectifier A2.Similarly,
A set of stator winding in a set of stator winding and stator modules G4 in stator modules G2 is connect with rectifier A3, stator modules
The another set of stator winding in another set of stator winding and stator modules G4 in G2 is connect with rectifier A4.Rectifier A1, A2,
A3 and A4 is correspondingly connected with inverter B1, B2, B3, B4 respectively.Relative to stator modules G1 and G3, rectifier A1 and A2 are in parallel,
Inverter B1, B2 are in parallel.Relative to stator modules G2 and G4, rectifier A3 and A4 are in parallel, and inverter B3, B4 are in parallel.Transformation electricity
Anti- module 11 includes reactor 13 and transformer 14.Wherein, transformer 14 be it is common have a high-voltage winding and two it is low
Press the transformer 14 of winding.It includes a reactor 13 that each reactor group, which is arranged,.As shown in figure 4, reactor 13 is defeated
Enter end connect with the output end of the inverter B1 in an Electrified Transmission link 10, the input terminal of another reactor 13 with it is another
The output end connection of inverter B2 in Electrified Transmission link 10, the output end of two reactors 13 respectively with transformer 14
Two low pressure windings are correspondingly connected with, and the output of the high-voltage winding of transformer 14 is passed through power grid.Reactor 13 and transformer 14 it is total
Reactance makes the circuit resonant frequencies of current transformer group in parallel avoid the converter switches frequency in current transformer group.
Structure three: when transformation reactance module 11 is connect with N Electrified Transmission link 10, N is the even number greater than 2, transformation
Reactance module 11 include weak coupling N Split winding transformer, and N number of output end of N Electrified Transmission link 10 respectively with it is weak
N number of winding of coupling N Split winding transformer low-pressure side is correspondingly connected with.One in a stator modules in one group of stator modules
Cover a set of stator winding in stator winding and another stator modules with the current transformer group in an Electrified Transmission link 10
Connection, another set of stator winding in a stator modules in one group of stator modules with it is another set of in another stator modules
Stator winding is connect with the current transformer group in another Electrified Transmission link 10.Fig. 5 is the another of another embodiment of the present invention
The structural schematic diagram of wind-driven generator in example.As shown in figure 5, wind-driven generator includes stator modules G1, G2, G3 and G4,
Wherein stator modules G1 and G3 are symmetrical, and stator modules G2 and G4 is symmetrical.It is electrical that stator modules G1 and G3 are connected in parallel two
Drive chain 10, stator modules G2 and G4 are connected with another two Electrified Transmission links 10 in parallel.Transformation reactance module 11 is weak
Quadripartion winding transformer 15 is coupled, is connect with four Electrified Transmission links 10.Specifically, a set of stator in stator modules G1
A set of stator winding in winding and stator modules G3 is connect with rectifier A1, the another set of stator winding in stator modules G1 and
Another set of stator winding in stator modules G3 is connect with rectifier A2.Similarly, a set of stator winding in stator modules G2 and
A set of stator winding in stator modules G4 is connect with rectifier A3, another set of stator winding and stator mould in stator modules G2
Another set of stator winding in block G4 is connect with rectifier A4.Rectifier A1, A2, A3 and A4 respectively with inverter B1, B2, B3,
B4 is correspondingly connected with.Relative to stator modules G1 and G3, rectifier A1 and A2 are in parallel, and inverter B1, B2 are in parallel.Relative to stator mould
Block G2 and G4, rectifier A3 and A4 are in parallel, and inverter B3, B4 are in parallel.Transformation reactance module 11 includes a weak coupling quadripartion
Winding transformer 15 (i.e. N is equal to 4 weak coupling N Split winding transformer), there are four low pressure winding and a high-voltage windings for tool.
Wherein inverter B1, B2, B3 and B4 and four windings of 15 low-pressure side of weak coupling quadripartion winding transformer are connected respectively.
Reactance between four windings of 15 low-pressure side of weak coupling quadripartion winding transformer makes the circuit of current transformer group in parallel humorous
Vibration frequency avoids the switching frequency of the current transformer in current transformer group.
Structure four: when transformation reactance module 11 is connect with N Electrified Transmission link 10, N is the even number greater than 2, transformation
Reactance module 11 include (N+1) winding transformer, and N number of output end of N Electrified Transmission link 10 respectively with (N+1) winding
N number of winding of step down side is correspondingly connected with.A set of stator winding in a stator modules in one group of stator modules and
A set of stator winding in another stator modules is connect with the current transformer group in an Electrified Transmission link 10, one group of stator
The another set of stator winding in another set of stator winding in a stator modules and another stator modules in module with
Current transformer group connection in another Electrified Transmission link 10.Fig. 6 is the wind-force in another example of another embodiment of the present invention
The structural schematic diagram of generator.As shown in fig. 6, wind-driven generator includes stator modules G1, G2, G3 and G4, wherein stator modules
G1 and G3 are symmetrical, and stator modules G2 and G4 is symmetrical.Stator modules G1 and G3 are connected with two Electrified Transmission links 10 in parallel, fixed
Submodule G2 and G4 are connected with another two Electrified Transmission links 10 in parallel.Transformation reactance module 11 is five-winding transformer 16,
It is connect with four Electrified Transmission links 10.Reactor group includes a reactor 13.Specifically, a set of fixed in stator modules G1
A set of stator winding in sub- winding and stator modules G3 is connect with rectifier A1, the another set of stator winding in stator modules G1
It is connect with the another set of stator winding in stator modules G3 with rectifier A2.Similarly, a set of stator winding in stator modules G2
It is connect with a set of stator winding in stator modules G4 with rectifier A3, another set of stator winding and stator in stator modules G2
Another set of stator winding in module G4 is connect with rectifier A4.Rectifier A1, A2, A3 and A4 respectively with inverter B1, B2,
B3, B4 are correspondingly connected with.Relative to stator modules G1 and G3, rectifier A1 and A2 are in parallel, and inverter B1, B2 are in parallel.Relative to fixed
Submodule G2 and G4, rectifier A3 and A4 are in parallel, and inverter B3, B4 are in parallel.Transformation reactance module 11 includes that five windings become
Depressor 16 (i.e. N is equal to 4 (N+1) winding transformer), there are four low pressure winding and a high-voltage windings for tool.Wherein inverter
B1, B2, B3 and B4 and four windings of 16 low-pressure side of five-winding transformer are connected respectively.The reactance of five-winding transformer 16
It can be less than or equal to high frequency circulating currents reactance threshold value, high frequency circulating currents reactance threshold value can also be greater than.If the electricity of five-winding transformer 16
It is anti-to be less than or equal to high frequency circulating currents reactance threshold value, and reactance is less than or equal to high frequency between four windings of 16 low-pressure side of five-winding transformer
Circulation reactance threshold value, then by the way that the reactor group of suitable reactance is arranged, so that the reactor being arranged in transformation reactance module 11
Group and total equivalent reactance of five-winding transformer 16 are greater than high frequency circulating currents reactance threshold value, enable in current transformer group in parallel
The resonance frequency for the circuit that current transformer is formed avoids the switching frequency of current transformer, to reduce unsteady flow in parallel in wind-driven generator
High frequency circulating currents in device group.If reactance is greater than high frequency circulating currents reactance threshold value between four windings of 16 low-pressure side of five-winding transformer,
The circuit for the circuit that then the reactor group in transformation reactance module 11 can be such that the current transformer in current transformer group in parallel is formed is humorous
Switching frequency of the vibration frequency far from current transformer, to further lower the high frequency ring in current transformer group in parallel in wind-driven generator
Stream.
Fig. 7 is the circuit diagram of the inverter parallel in the embodiment of the present invention.As shown in fig. 7, six of upper part
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) is an inverter, lower part
Six IGBT be another inverter.Fig. 8 a is one of the equivalent circuit diagram of two inverter parallels in Fig. 7, is equivalent to Fig. 7
S in six IGBT of middle and upper part pointap1 and lower part six IGBT in Sap2 conductings, the two sides DC source of equivalent circuit
Polarity is identical, equal in magnitude, and circulation is not present.Fig. 8 b is two of the equivalent circuit diagram of two inverter parallels in Fig. 7, is equivalent to
S in six IGBT of the middle and upper part Fig. 7 pointan1 and lower part six IGBT in San2 conductings, the two sides direct current of equivalent circuit
Source polarity is identical, equal in magnitude, and circulation is not present.Fig. 8 c is three of the equivalent circuit diagram of two inverter parallels in Fig. 7, quite
S in six IGBT of the middle and upper part Fig. 7 pointap1 and lower part six IGBT in San2 conductings, the two sides of equivalent circuit are straight
Source polarity is flowed on the contrary, forming circulation.Fig. 8 d is four of the equivalent circuit diagram of two inverter parallels in Fig. 7, is equivalent in Fig. 7
S in six partial IGBTan1 and lower part six IGBT in Sap2 conductings, the two sides direct current source polarity of equivalent circuit
On the contrary, forming circulation.For the carrier wave of inverter there are when certain phase difference, inverter in parallel will have such as Fig. 8 c and Fig. 8 d
Shown in high frequency circulating currents.Fig. 9 is exchange steady-state equivalent circuit diagram corresponding with Fig. 8 c, wherein LxWith rxRespectively in parallel two
The equivalent inductance (i.e. wiring inductance) and resistance of line, ω between inverterSFor the switching frequency of inverter, IscFor high frequency ring
Stream, remaining rL, rcFor equivalent resistance, LfAnd CfFor filter inductance and filter capacitor.It can be calculated according to following formula (1)
Obtain high frequency circulating currents Isc:
In order to calculate high frequency circulating currents IscSimplicity, and do not influence high frequency circulating currents and LxBetween qualitative relationships, can be ignored
rL、rcAnd rx, obtain following formula (2):
According to formula it is found that when the phase difference of carrier wave is kept constant, the peak value at circulation peak is switched with wiring inductance Lx
Variation be not it is linear, maximum value can be obtained in some value.When the resonance frequency of second mesh in Fig. 9When equal with the switching frequency of inverter, the high frequency circulating currents in wind-driven generator are maximum.For example,
It is calculated according to the relevant parameter of a certain wind-driven generator it is found that making the maximum wiring inductance L of high frequency circulating currentsxIn 10-20uH or so,
The reactance of transformation reactance module 11 can be set in mH rank, resonance frequency can be avoided, thus greatly reduce high frequency circulating currents.
It should be noted that Split winding transformer refers to every phase by a high-voltage winding and two or more voltages and appearance
Measure the Multiple coil power transformer that low pressure winding all the same is constituted.Fixed frequency, the fixed amplitude that inverter can be generated
AC energy is transmitted to high-voltage winding from low pressure winding, and then has the function of limiting short-circuit current in failure.Moreover, by
In Split winding transformer, cost is relatively low, and installation is simple, small in size, therefore can also reduce the cost of wind-driven generator.
A plurality of Electrified Transmission link 10 in wind-driven generator in above-described embodiment is respectively independent, if wind-driven generator packet
Four Electrified Transmission links 10 are included, then every Electrified Transmission link 10 transmits the gross output of a quarter.If individual stators
Module, rectifier, inverter, Split winding transformer break down, and only corresponding Electrified Transmission link 10 fails, and only have
A part of output power is affected, and without failure Electrified Transmission link 10 can still work normally, and transmits output work
Rate.For example, the gross output of wind-driven generator is 6MW, then the power of every Electrified Transmission chain output is 1.5MW.When one
The corresponding stator modules of Electrified Transmission link 10, rectifier, inverter, Split winding transformer low pressure winding in 1 member
When part failure, it can also realize that the output power of wind-driven generator transmission is 4.5MW；When an Electrified Transmission link 10 is corresponding
When the high-voltage winding failure of Split winding transformer, it is 3MW that wind-driven generator transmission grid power, which may be implemented,.The present invention is implemented
Wind-driven generator in example can stator modules, rectifier, inverter, transformer (including the double transformer with split winding 12 of weak coupling,
Three-winding transformer 14, weak coupling N Split winding transformer or (N+1) winding transformer) break down and can not on-call maintenance
When, drop power fault-tolerant operation is realized, to reduce economic loss caused by wind-driven generator failure.
For the above-mentioned stator modules for including two sets of stator winding, phase is identical between two sets of stator winding, or
30 ° of phase phase difference or 180 ° of phase phase difference.The phase phase for two sets of stator winding being connect with same Electrified Transmission link 10
Together.For example, as shown in Fig. 2, phase between two sets of stator winding of stator modules G1 can be identical or 30 ° of phase phase difference, or
180 ° of phase phase difference.The stator winding positioned at outer ring of stator modules G1 and G3 are connect with the electrical transmitting link road of same, stator
Module G1 is identical as the phase of the stator winding positioned at outer ring of G3.
It should be noted that feature described above, structure or characteristic can be incorporated in one in any suitable manner
In a or more embodiment.In the following description, many details are provided to provide and fill to the embodiment of the present invention
Sub-argument solution.It will be appreciated, however, by one skilled in the art that technical solution of the present invention can be practiced without in specific detail
It is one or more, or can be using other methods, constituent element, material etc..In other cases, it is not shown in detail or describes public affairs
Know structure, material or operation to avoid major technique intention of the invention is obscured.
Claims (11)
1. a kind of wind-driven generator characterized by comprising
At least one set of stator modules (G1, G2, G3, G4), every group of stator modules (G1, G2, G3, G4) include two symmetrical stators
Module (G1, G2, G3, G4)；
Electrified Transmission link (10), every group of stator modules (G1, G2, G3, G4) are connected with two Electrified Transmission links in parallel
(10), every Electrified Transmission link (10) includes current transformer group；
At least one transformation reactance module (11), each transformation reactance module (11) and at least one Electrified Transmission link
(10) it connects, the transformation reactance module (11) is configured with so that the circuit resonant frequencies of current transformer group in parallel are avoided
The reactance of converter switches frequency in current transformer group.
2. wind-driven generator according to claim 1, which is characterized in that when the transformation reactance module (11) with it is in parallel
When two Electrified Transmission link (10) connections, the transformation reactance module (11) includes the double Split winding transformers of weak coupling
(12), and two output ends of two Electrified Transmission links (10) of the parallel connection divide windings with the weak coupling pair respectively
Two windings of transformer (12) low-pressure side are correspondingly connected with.
3. wind-driven generator according to claim 1, which is characterized in that when the transformation reactance module (11) and two electricity
When gas drive chain (10) connects, the transformation reactance module (11) includes reactor group and three-winding transformer (14), and institute
Two output ends for stating two Electrified Transmission links (10) in parallel are respectively connected with a reactor group, two reactor groups it is defeated
Two windings of the outlet respectively with three-winding transformer (14) low-pressure side are correspondingly connected with.
4. wind-driven generator according to claim 1, which is characterized in that when the transformation reactance module (11) and N item electricity
When gas drive chain (10) connects, N is the even number greater than 2, and the transformation reactance module (11) includes that weak coupling N division winding becomes
Depressor, and N number of output end of the N Electrified Transmission link (10) respectively with weak coupling N Split winding transformer low-pressure side
N number of winding be correspondingly connected with.
5. wind-driven generator according to claim 1, which is characterized in that when the transformation reactance module (11) and N item electricity
When gas drive chain (10) connects, N is even number greater than 2, the transformation reactance module (11) include reactor group and (N+1) around
Group transformer, and N number of output end of N Electrified Transmission link (10) of the parallel connection is respectively connected with a reactor group, N number of electricity
N number of winding of the output end of anti-device group respectively with (N+1) winding transformer low-pressure side is correspondingly connected with.
6. wind-driven generator according to claim 1, which is characterized in that the current transformer group includes and the stator modules
The rectifier (A1, A2, A3, A4) of (G1, G2, G3, G4) connection and the inversion connected with the rectifier (A1, A2, A3, A4)
Device (B1, B2, B3, B4).
7. wind-driven generator according to claim 1 or 6, which is characterized in that each stator modules (G1, G2, G3,
It G4) include a set of or a set of above stator winding.
8. wind-driven generator according to claim 1 or 6, which is characterized in that each stator modules (G1, G2, G3,
It G4) include two sets of stator winding.
9. wind-driven generator according to claim 8, which is characterized in that phase is identical between two sets of stator winding,
Perhaps 30 ° of phase phase difference or 180 ° of phase phase difference.
10. wind-driven generator according to claim 8, which is characterized in that in one group of stator modules (G1, G2, G3, G4)
One in a set of stator winding and another stator modules (G1, G2, G3, G4) in one stator modules (G1, G2, G3, G4)
Set stator winding is connect with the current transformer group in an Electrified Transmission link (10), one group of stator modules (G1, G2, G3,
G4 the another set of stator winding and another described stator modules in one stator modules (G1, G2, G3, G4) in)
Another set of stator winding in (G1, G2, G3, G4) is connect with the current transformer group in another Electrified Transmission link (10).
11. wind-driven generator according to claim 10, which is characterized in that connect with same Electrified Transmission link (10)
Two sets of stator winding phase it is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611270846.2A CN106787459B (en) | 2016-12-29 | 2016-12-29 | Wind power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611270846.2A CN106787459B (en) | 2016-12-29 | 2016-12-29 | Wind power generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106787459A CN106787459A (en) | 2017-05-31 |
| CN106787459B true CN106787459B (en) | 2018-12-25 |
Family
ID=58952259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611270846.2A Active CN106787459B (en) | 2016-12-29 | 2016-12-29 | Wind power generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106787459B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860231A (en) * | 2010-05-20 | 2010-10-13 | 新疆全新环保新技术科技有限公司 | Special tri-level full-power converter set for large power wind-driven generator |
| US20110141773A1 (en) * | 2010-08-05 | 2011-06-16 | General Electric Company | Hvdc connection of wind turbine |
| CN102868180A (en) * | 2012-09-26 | 2013-01-09 | 浙江大学 | Wind power generation system based on open winding structure and fault tolerance control method thereof |
| CN104242341A (en) * | 2014-09-12 | 2014-12-24 | 周细文 | Direct-drive wind power conversion structure based on MMC and bipolar direct-current transmission structure |
-
2016
- 2016-12-29 CN CN201611270846.2A patent/CN106787459B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860231A (en) * | 2010-05-20 | 2010-10-13 | 新疆全新环保新技术科技有限公司 | Special tri-level full-power converter set for large power wind-driven generator |
| US20110141773A1 (en) * | 2010-08-05 | 2011-06-16 | General Electric Company | Hvdc connection of wind turbine |
| CN102868180A (en) * | 2012-09-26 | 2013-01-09 | 浙江大学 | Wind power generation system based on open winding structure and fault tolerance control method thereof |
| CN104242341A (en) * | 2014-09-12 | 2014-12-24 | 周细文 | Direct-drive wind power conversion structure based on MMC and bipolar direct-current transmission structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106787459A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108574420B (en) | Power electronic conversion unit and system | |
| CN102739095B (en) | system and method for power conversion | |
| CN101197503B (en) | Collection and transmission system | |
| CN108566072A (en) | Modular power system | |
| CN105379090B (en) | Modular multilevel DC-DC converter for high voltage direct current application | |
| CN104079184A (en) | Wind power converter based on bipolar direct-current structure | |
| CN101860231A (en) | Special tri-level full-power converter set for large power wind-driven generator | |
| CN102263414A (en) | Electrical energy changer and system | |
| CN103427657A (en) | High-voltage DC-DC conversion device | |
| CN103299530A (en) | Assembly for converting an input AC voltage to an output AC voltage | |
| CN104242345A (en) | High-power direct drive wind power converter circuit topological structure and application thereof | |
| CN104242341A (en) | Direct-drive wind power conversion structure based on MMC and bipolar direct-current transmission structure | |
| CN102545644A (en) | Matrix AC (alternating current)-AC high voltage frequency converter topology structure | |
| CN103427652A (en) | High-voltage high-power DC-DC conversion device | |
| US9859806B2 (en) | Method and apparatus for obtaining electricity from offshore wind turbines | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN113346764A (en) | Medium voltage converter topological structure based on high frequency magnetic coupling module | |
| CN105656336A (en) | Converter structure for reducing direct-current side harmonics | |
| CN103199691B (en) | Zero power starting method of thermal generator set with high-voltage direct-current transmission system | |
| CN204392098U (en) | A kind of Monophase electric power electronic transformer and application system thereof | |
| CN110247416A (en) | Multiport direct current flexibility multimode switching device based on bifurcated bridge arm structure | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| CN210297566U (en) | High-reliability high-power case-based medium-high voltage direct current power supply | |
| CN203104360U (en) | A high-voltage frequency converter with a common DC bus | |
| CN103875172A (en) | DC/AC converter, power generation plant and operating method for a DC/AC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |