CN106329570A - Wind turbine generator system - Google Patents
Wind turbine generator system Download PDFInfo
- Publication number
- CN106329570A CN106329570A CN201610817902.3A CN201610817902A CN106329570A CN 106329570 A CN106329570 A CN 106329570A CN 201610817902 A CN201610817902 A CN 201610817902A CN 106329570 A CN106329570 A CN 106329570A
- Authority
- CN
- China
- Prior art keywords
- low
- pressure side
- winding
- transformator
- current transformer
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 186
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 230000011664 signaling Effects 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 230000009466 transformation Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H02J3/386—
-
- 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
Abstract
The invention discloses a wind turbine generator system comprising a transformer, a converter, a generator, a wind turbine, and a tower, which are sequentially connected together. The converter comprises a controller; grid side converters and a machine side converter, which are connected with the controller. The grid side converters are connected with the transformer, and the machine side converter is connected with the generator. The generator is connected with the wind turbine, and the wind turbines is disposed on the top part of the tower. The high voltage side winding of the transformer is connected with an external power grid by a high voltage side switch. The low voltage side winding of the transformer comprises low voltage side windings A used for providing power interfaces, and the leakage inductance per unit corresponding to the windings A is greater than or equal to 5%, and the power interfaces are connected with the grid side converters by low voltage side switches. The converter comprises a voltage sampling circuit connected with the controller, and the circuit is disposed on the high voltage side winding of the transformer. The low voltage side windings of the transformer comprise low voltage side windings B used for providing signal interfaces, and the circuit is disposed on the signal interfaces of the windings B. The circuit costs and the construction costs of the wind turbine generator system are reduced.
Description
Technical field
The present invention relates to a kind of wind power generating set.
Background technology
High-power (MW class) wind power generating set is generally divided into double feed wind power generator group and total power type wind-force is sent out
Group of motors.
As it is shown in figure 1, existing double feed wind power generator group generally comprise be sequentially connected with transformator, current transformer, generating
Machine, wind energy conversion system and tower (not shown).Wind energy conversion system includes that blade and gear-box, electromotor are mechanically connected with wind energy conversion system,
It is mounted on atop a tower.Transformator generally comprises high side switch, transformer body and low-side switch；Transformer body by
One high-pressure side winding and a low-pressure side winding composition, high-pressure side winding is connected with external electrical network by high side switch,
Low-pressure side winding is connected with current transformer by low-side switch.Current transformer generally comprises controller, grid side converter, pusher side conversion
Device, low-side switch, net side filter and stator switch etc., wherein, grid side converter and machine-side converter are female by direct current
Line connects, and net side filter is made up of filter inductance and filter capacitor, and grid side converter is opened by net side filter and low-pressure side
Closing and be connected with transformator, machine-side converter connects the rotor windings of double-fed generator, and the stator winding of double-fed generator is through contact
Device is also connected with transformator with low-side switch.For powering to the internal unit of wind power generating set, current transformer need to be joined toward contact
Put auxiliary transformer.
As in figure 2 it is shown, existing total power type wind power generating set generally comprise be sequentially connected with transformator, current transformer, send out
Motor, wind energy conversion system and tower (not shown).Wind energy conversion system includes that blade, electromotor are mechanically connected with wind energy conversion system, are respectively mounted
In atop a tower.Transformator generally comprises high side switch, transformer body and low-side switch；Transformer body is high by one
Pressure side winding and a low-pressure side winding composition, high-pressure side winding is connected with external electrical network by high side switch；Low-pressure side
Winding is connected with current transformer by low-side switch.Current transformer generally comprises controller, grid side converter, machine-side converter, low
Pressure side switch and net side filter etc., wherein, grid side converter and machine-side converter are connected by dc bus, the filtering of net side
Device is made up of filter inductance and filter capacitor, and grid side converter is connected with transformator with low-side switch by net side filter,
Machine-side converter connects the stator winding of either synchronously or asynchronously electromotor.For powering to the internal unit of wind power generating set, unsteady flow
Device need to configure auxiliary transformer toward contact.
Existing high-power wind-driven generator group has following defects that
First, transformator and current transformer independently of one another, have respective panel switches respectively, not only cause one on circuit
A little components repeat to arrange, and also cannot utilize transformator and the respective electric circuit characteristic of current transformer, reach to simplify circuit structure, subtract
Few component, reduces the purpose of circuit cost.
Secondly as transformator and current transformer are installed on physical layout the most independently of one another, usual current transformer is installed on
Inside tower, transformator is installed on outside tower, forms box type transformer, thus causes the connection between transformator and current transformer
Generally require and lay longer high-current cable, increase the construction cost of wind power generating set.
Summary of the invention
The technical problem to be solved in the present invention is, it is provided that a kind of wind power generating set, overcomes existing high-power wind to send out
The defect that transformator, converter circuit cost are high, construction cost is high that group of motors exists.
The technical solution adopted for the present invention to solve the technical problems is: a kind of wind power generating set of structure, including successively
Transformator, current transformer, electromotor, wind energy conversion system and the tower connected；This current transformer includes that controller controls to be connected with this controller
And the grid side converter that is connected by dc bus and machine-side converter, this grid side converter is electrically connected with this transformator,
This machine-side converter is electrically connected with this electromotor, and this electromotor is mechanically connected with this wind energy conversion system, and this wind energy conversion system is installed on this tower
Cylinder top, the high-pressure side winding of this transformator is connected with external electrical network by high side switch；
It is characterized in that, the low-pressure side winding of this transformator includes the low-pressure side winding A of the most a set of offer power interface,
Each described leakage inductance perunit value corresponding for low-pressure side winding A is more than or equal to 5%, and by its power interface through low-side switch and institute
State grid side converter to connect；
This current transformer includes the voltage sampling circuit being connected with described controller；This voltage sampling circuit is arranged on this transformation
On the high-pressure side winding of device, or the low-pressure side winding of this transformator includes the low-pressure side winding B of the most a set of offer signaling interface,
This voltage sampling circuit is arranged on the signaling interface of this low-pressure side winding B.
In the wind power generating set of the present invention, described electromotor is double-fed type electromotor；
Described transformator includes a set of described low-pressure side winding A, and the power interface of this low-pressure side winding A is opened by low-pressure side
Close the grid side converter connecting described current transformer, and connect the stator winding of described double-fed type electromotor through grid-connected switch；
Or described transformator includes two sets described low-pressure side winding A, the power interface of a set of described low-pressure side winding A1 leads to
Crossing low-side switch one to be connected with the grid side converter of described current transformer, the power interface of another set of described low-pressure side winding A2 leads to
Cross low-side switch two and be connected through the stator winding of grid-connected switch with described double-fed type electromotor.
In the wind power generating set of the present invention, the voltage rating of described low-pressure side winding A2 higher than described low-pressure side around
The voltage rating of group A1；The power interface of described low-pressure side winding A connects institute by low-side switch through overcurrent protective device
State the grid side converter of current transformer.
In the wind power generating set of the present invention, described electromotor is synchronous generator or asynchronous generator；Described transformation
Device includes a set of described low-pressure side winding A, and the power interface of this low-pressure side winding A passes through low-side switch through overcurrent protective device
Connecting the grid side converter of described current transformer, the machine-side converter of this current transformer connects described motor stator.
In the wind power generating set of the present invention, described electromotor is synchronous generator or asynchronous generator；Described transformation
Device includes at least two described low-pressure side winding A of set, and described current transformer comprises the identical number of the low-pressure side winding A with described transformator
The grid side converter of amount；The low-pressure side winding A of described transformator is connected with the grid side converter one_to_one corresponding of described current transformer.
In the wind power generating set of the present invention, the grid side converter of described current transformer is connected in series or side by side at DC side
After connection, it is connected with the DC side of described machine-side converter.
In the wind power generating set of the present invention, described low-pressure side winding B also provides for power interface, for wind power generating set
Internal unit power.
In the wind power generating set of the present invention, the low-pressure side leakage inductance perunit value of described transformator is more than or equal to high pressure side leakage
Sense perunit value.
In the wind power generating set of the present invention, described transformator and described current transformer layered arrangement are arranged on described tower
In；Or described transformator and described current transformer layered arrangement or arrange with layer is arranged in a rack.
In the wind power generating set of the present invention, described low-side switch is arranged in described current transformer or is arranged on described
In transformator；Described voltage sampling circuit is voltage transformer, voltage hall sensor, resistor voltage divider circuit or linear light
Coupling.
Implementing the wind power generating set of the present invention, compared with the prior art, it provides the benefit that:
1. transformator and the converter circuit of wind power generating set are carried out integrated, make full use of step down side winding
Leakage inductance realizes the filtering of current transformer grid side converter AC, it is not necessary to arranges current transformer filter circuit, decreases low-pressure side simultaneously
The usage quantity of switch, reduces the circuit cost of wind power generating set；
2. transformator and the current transformer of wind power generating set are commonly mounted in tower or rack, shorten transformator with
Connection distance between current transformer, greatly reduces the high-current cable consumption needed for installation, reduces wind power generating set
Construction cost.
Accompanying drawing explanation
Fig. 1 is the system composition schematic diagram of existing double feed wind power generator group.
Fig. 2 is the system composition schematic diagram of existing total power type wind power generating set.
Fig. 3 be wind power generating set of the present invention substantially form schematic diagram.
Fig. 4 is system composition schematic diagram (double-fed) of wind power generating set embodiment one of the present invention.
Fig. 5 is system composition schematic diagram (double-fed) of wind power generating set embodiment two of the present invention.
Fig. 6 is system composition schematic diagram (total power type) of wind power generating set embodiment three of the present invention.
Fig. 7 is system composition schematic diagram (total power type) of wind power generating set embodiment four of the present invention.
Fig. 8 is system composition schematic diagram (total power type) of wind power generating set embodiment five of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As it is shown on figure 3, the wind power generating set of the present invention include being sequentially connected with transformator, current transformer, electromotor, wind-force
Machine and tower (not shown).
Current transformer includes controller, grid side converter and machine-side converter.Grid side converter and machine-side converter are by straight
Stream bus is connected, and controls to be connected with controller respectively.Grid side converter and transformator are electrically connected, machine-side converter with send out
Motor is electrically connected.
Electromotor is mechanically connected with wind energy conversion system, and wind energy conversion system is installed on atop a tower.
The high-pressure side winding of transformator is connected with external electrical network by high side switch.Step down side winding includes
Low-pressure side winding A and low-pressure side winding B, low-pressure side winding A provide power interface, and low-pressure side winding B provides signaling interface.Design
Time ensure leakage inductance perunit value corresponding to low-pressure side winding A more than or equal to 5%, by the power interface of low-pressure side winding A through low pressure
Side switch is connected with grid side converter.Low-pressure side winding B is connected with controller by its signaling interface.
Current transformer includes voltage sampling circuit, and this voltage sampling circuit is arranged on the signaling interface of this low-pressure side winding B,
And be connected with controller.
Voltage sampling circuit is the element obtaining information of voltage, includes but not limited to voltage transformer, voltage hall sensing
Device, resistor voltage divider circuit or linear optical coupling etc..
In other embodiments, low-pressure side winding B can be not provided with, the voltage sampling circuit of transformator is arranged on transformation
On the winding of device high-pressure side, and it is connected with controller.
Embodiment one
As shown in Figure 4, the wind power generating set of the present invention includes being sequentially connected with transformator, current transformer, double-fed generator,
Wind energy conversion system and tower (not shown).Wherein:
Current transformer includes that controller, low-side switch, catalyst, fuse, the net side that connected by dc bus are converted
Device and machine-side converter.The grid side converter of current transformer is electrically connected with transformator by fuse and low-side switch, unsteady flow
The machine-side converter of device is electrically connected with the rotor windings of double-fed generator.The stator winding of double-fed generator by catalyst and
Low-side switch is electrically connected with transformator, and the rotor of double-fed generator is mechanically connected with wind energy conversion system.Wind energy conversion system include blade and
Gear-box, is installed on the top of tower.Wherein, catalyst, the employing grid-connected switch such as IGCT, chopper can exchange, fusing
The overcurrent protective device such as device, chopper can exchange.
In other embodiments, being not provided with the overcurrent protective devices such as fuse, current transformer grid side converter is directly by low
Pressure side switch is electrically connected with transformator, does not affect the realization of the basic goal of the invention of the present invention.
In the present embodiment, transformator includes high-pressure side winding and three class low-pressure side windings, and wherein, high-pressure side winding passes through
High side switch is connected with external electrical network.In three class low-pressure side windings: low-pressure side winding A provides power interface, passes through low pressure
Side switch is connected with the grid side converter of current transformer；Low-pressure side winding B provides signaling interface, by voltage sampling circuit and change
The controller of stream device is connected；3rd class low-pressure side winding is also adopted by low-pressure side winding A and provides power interface, specially to wind-power electricity generation
The internal unit of unit is powered.
In other embodiments, transformator can be not provided with the 3rd class low-pressure side winding；The inside of wind power generating set sets
Standby can adopting is powered in other ways, such as, uses accumulator mode to power.
The electric pressure of high voltage side of transformer winding according to wind power generating set need arrange, such as, transformer high-voltage
Side winding voltage may be provided at 10kV, and the electric pressure of all kinds of low-pressure side windings may be provided at 690V.
In order to reduce transformator and the consumption of high-current cable that current transformer is installed and used, transformator and current transformer can be pressed
Layered arrangement or with layer arrangement integrated installation in same cabinet, to reduce installation cost.
The low-pressure side winding A of transformator connects the grid side converter of current transformer, the most only need to arrange one-level low-side switch,
Save distribution cost.Meanwhile, can leakage inductance corresponding for the low-pressure side winding A of transformator be designed to higher, such as, it is corresponding
Induction reactance perunit value is arranged on more than 5%, so, and the power interface of the grid side converter of current transformer this low-pressure side winding the most available
Realize AC-DC energy conversion with leakage inductance to filter with current on line side, it is not necessary to arrange original separate filter and (comprise filtered electrical
Sense and filter capacitor).
The leakage inductance that grid side converter utilizes the low-pressure side winding of transformator corresponding realizes AC-DC energy conversion as it
Filter inductance time, grid side converter must gather i.e. near the line voltage of electrical network side before this leakage inductance on controlling, real
Existing mode includes: 1, is arranged on by voltage sampling circuit on high voltage side of transformer winding and (now, can be not provided with low-pressure side winding
B.)；2, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit and controller
Connect.
Low-pressure side winding B and the 3rd class low-pressure side winding in the present embodiment can also share, and are i.e. not provided with the 3rd class low
Pressure side winding, utilizes low-pressure side winding B output to power the internal unit of wind power generating set.
Embodiment two
As it is shown in figure 5, the wind power generating set of the present embodiment include being sequentially connected with transformator, current transformer, doubly-fed generation
Machine, wind energy conversion system and tower (not shown).Wherein:
Current transformer includes controller, catalyst and the grid side converter connected by dc bus and machine-side converter.
The grid side converter of current transformer is electrically connected with transformator by low-side switch II, and the machine-side converter of current transformer is sent out with double-fed
The rotor windings electrical connection of motor；The stator winding of double-fed generator is by catalyst and low-side switch I and transformator electricity
Gas connects；The rotor of double-fed generator is mechanically connected with wind energy conversion system；Wind energy conversion system includes blade and gear-box, is installed on tower top
Portion.
In the present embodiment, transformator include high-pressure side winding, low-pressure side winding A and low-pressure side winding B two class low-pressure side around
Group, and low-side switch I corresponding with low-pressure side winding A and low-side switch II.Wherein, high-pressure side winding is opened by high-pressure side
Close and be connected with external electrical network；Low-pressure side winding A includes that two sets provide the winding of power interface, and low-pressure side winding A1 is defeated for first set
Go out electric pressure one, and be connected with the grid side converter of current transformer by low-side switch II；Second set low-pressure side winding A2
Output voltage grade two, is connected with the stator winding of double-fed generator by low-side switch I and catalyst.Low-pressure side winding
B provides signaling interface and power interface, on the one hand provides signaling interface, is connected with the controller of current transformer；On the other hand carry
For power interface, the internal unit of wind power generating set is powered.
As example, according to the needs of wind power generating set, the electric pressure of high voltage side of transformer winding may be provided at
35kV, the electric pressure of first set low-pressure side winding A1 may be provided at 690V, and the electric pressure of the second set low-pressure side winding A2 can
Being arranged on 3000V, the electric pressure of low-pressure side winding B may be provided at 690V.Here, the second set low-pressure side winding A2 is owing to connecting
The stator winding of double-fed generator, it is not necessary to through grid side converter and the machine of the current transformer comparatively sensitive to electric pressure
Side converter, therefore the electric pressure that its electric pressure can arrange than first set low-pressure side winding A1 is high, thus reduce double-fed and send out
The electric current of the stator branch road of motor, and corresponding catalyst, the current class of low-side switch I, promote the economy of system.
Owing to the physical distance of transformator and current transformer is relatively near, can be simultaneously attached in the way of layered arrangement in tower,
To save installation cost.
The first set low-pressure side winding A1 of transformator connects the grid side converter of current transformer, the most only need to arrange one-level low pressure
Side switch II, the second set low-pressure side winding A2 of transformator connect the stator winding of double-fed generator, the most only need to arrange one
Level low-side switch I, these all save distribution cost.
Meanwhile, leakage inductance corresponding for the first set low-pressure side winding A1 of transformator is designed to higher, such as, by its corresponding sense
Anti-perunit value is arranged on more than 5%.So, the grid side converter of current transformer just this low-pressure side winding available power interface and
Leakage inductance realizes AC-DC energy conversion and filters with current on line side, it is not necessary to arranges independent wave filter and (comprises filter inductance, filter
Ripple electric capacity).
The leakage inductance that grid side converter utilizes the low-pressure side winding of transformator corresponding realizes AC-DC energy conversion as it
Filter inductance time, grid side converter must gather i.e. near the line voltage of electrical network side before this leakage inductance on controlling, real
Existing mode includes: 1, is arranged on by voltage sampling circuit on high voltage side of transformer winding and (now, can be not provided with low-pressure side winding
B)；2, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is with controller even
Connecing, controller realizes the control of voltage sample and grid side converter.
Embodiment three
As shown in Figure 6, the wind power generating set of the present embodiment includes being sequentially connected with transformator, current transformer, electromotor, wind
Power machine and tower (not shown).Wherein:
Current transformer includes controller, low-side switch, the grid side converter connected by dc bus and machine-side converter.
The grid side converter of current transformer is electrically connected with transformator by low-side switch, the machine-side converter of current transformer and electromotor
Stator winding is electrically connected；Electromotor is that either synchronously or asynchronously electromotor, its rotor and wind energy conversion system are mechanically connected；Wind energy conversion system includes leaf
Sheet, is installed on atop a tower.
In the present embodiment, transformator includes high-pressure side winding and two class low-pressure side windings.Wherein, high-pressure side winding is by height
Pressure side switch is connected with external electrical network；Low-pressure side winding A provides power interface, by the net side of low-side switch Yu current transformer
Changer is connected；Low-pressure side winding B provides signaling interface and power interface, on the one hand provides signaling interface, with current transformer
Controller is connected, and on the other hand provides power interface, powers the internal unit of wind power generating set.
As example, according to the needs of wind power generating set, the electric pressure of the high-pressure side winding of transformator may be provided at
10kV, the electric pressure of all kinds of low-pressure side windings may be provided at 690V.
Owing to the physical distance of transformator and current transformer is relatively near, can integrated installation (arranging or layered arrangement with layer) same
In individual cabinet, to save installation cost.
The low-pressure side winding A of transformator connects the grid side converter of current transformer, the most only need to arrange one-level low tension switch, with
Save distribution cost.Meanwhile, leakage inductance corresponding for the low-pressure side winding A of transformator is designed to higher, such as, by its corresponding induction reactance
Perunit value is arranged on more than 5%.So, the grid side converter of current transformer just may utilize power interface and the leakage of this low-pressure side winding
Sense realizes AC-DC energy conversion and filters with current on line side, it is not necessary to arranges independent wave filter and (includes filter inductance, filtering
Electric capacity).
The leakage inductance that grid side converter utilizes the low-pressure side winding of transformator corresponding realizes AC-DC energy conversion as it
Filter inductance time, grid side converter must gather i.e. near the line voltage of electrical network side before this leakage inductance on controlling, real
Existing mode includes: 1, is arranged on by voltage sampling circuit on high voltage side of transformer winding and (now, can be not provided with low-pressure side winding
B)；2, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is with controller even
Connecing, controller realizes the control of voltage sample and grid side converter.
Embodiment four
As it is shown in fig. 7, the wind power generating set of the present embodiment include being sequentially connected with transformator, current transformer, electromotor, wind
Power machine and tower (not shown).Wherein:
Current transformer includes controller and two grid side converters connected by dc bus and two machine-side converters,
Two grid side converters of current transformer are at DC side parallel, and AC is the most respectively by low-side switch I and low-side switch II
It is electrically connected with transformator；Two machine-side converters of current transformer are in parallel at DC side, AC, and AC is determined with electromotor
Sub-winding is electrically connected；Electromotor is that either synchronously or asynchronously electromotor, its rotor and wind energy conversion system are mechanically connected；Wind energy conversion system includes leaf
Sheet, is installed on atop a tower.
In other embodiments, grid side converter and the machine-side converter quantity of current transformer are equal and the most multiple, even
Connect mode as also described above.
In the present embodiment, transformator include high-pressure side winding, two class low-pressure side windings (low-pressure side winding A and low-pressure side around
Group B) and the low-side switch corresponding with low-pressure side winding A.Wherein, high-pressure side winding passes through high side switch and external electrical network phase
Connect；Low-pressure side winding A includes that two sets provide the winding of power interface, and its output voltage grade is suitable, and passes through low pressure respectively
Switch I, II are connected with two grid side converters of current transformer in side；Low-pressure side winding B provides signaling interface, with the control of current transformer
Device processed is connected.
As example, according to the needs of wind power generating set, the electric pressure of the high-pressure side winding of transformator may be provided at
20kV, the electric pressure of all kinds of low-pressure side windings may be provided at 690V.
Owing to the physical distance of transformator and current transformer is relatively near, can be simultaneously attached in the way of layered arrangement in tower,
To save installation cost.
The low-pressure side winding A of transformator connects the grid side converter of current transformer, the most only need to arrange one-level low-side switch,
To save distribution cost.Meanwhile, leakage inductance corresponding for the low-pressure side winding A of transformator is designed to higher, such as, by its corresponding sense
Anti-perunit value is arranged on more than 5%, so, the power interface of the grid side converter of current transformer just this low-pressure side winding available and
Leakage inductance realizes AC-DC energy conversion and filters with current on line side, it is not necessary to arrange independent wave filter.
The leakage inductance that grid side converter utilizes the low-pressure side winding of transformator corresponding realizes AC-DC energy conversion as it
Filter inductance time, grid side converter must gather i.e. near the line voltage of electrical network side before this leakage inductance on controlling, real
Existing mode includes: 1, is arranged on by voltage sampling circuit on high voltage side of transformer winding and (now, can be not provided with low-pressure side winding
B)；2, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is with controller even
Connecing, controller realizes the control of voltage sample and grid side converter.
In this enforcement, two grid side converters of current transformer can use identical modulated signal and phase place phase on controlling
Differ from the carrier signal of 180 degree and realize the driving to its power semiconductor, thus utilize in transformator two set low-pressure sides around
Leakage inductance between group A realizes the inside of switching harmonics electric current and offsets, and promotes and network electric energy quality.
Embodiment five
As shown in Figure 8, the wind power generating set of the present embodiment includes being sequentially connected with transformator, current transformer, electromotor, wind
Power machine and tower (not shown).Wherein:
Current transformer includes controller and two grid side converters connected by dc bus and a machine-side converter.Become
Two grid side converters of stream device are connected at DC side, and AC is electrically connected with transformator by low-side switch I, II the most respectively
Connect.The machine-side converter of current transformer, the dc bus after connecting with two grid side converter DC sides in one end is electrically connected, another
End is electrically connected with the stator winding of electromotor.Electromotor is that either synchronously or asynchronously electromotor, its rotor and described wind energy conversion system are mechanical
Connect；Wind energy conversion system includes blade, is installed on the top of described tower.
In other embodiments, the grid side converter quantity of current transformer can be two or more, and machine-side converter can also
Being two or more, grid side converter is connected with machine-side converter after being connected in series again.
In the present embodiment, transformator include high-pressure side winding, two class low-pressure side windings (low-pressure side winding A and low-pressure side around
Group B) and low-side switch I corresponding with low-pressure side winding A, II.Wherein, high-pressure side winding passes through high side switch and external electrical
Net is connected；Low-pressure side winding A includes that two sets provide the winding of power interface, and its output voltage grade is suitable, and passes through respectively
Low-side switch I, II are connected with two grid side converters of current transformer.Low-pressure side winding B provides signaling interface, with current transformer
Controller be connected, on the other hand power interface is provided, the internal unit of wind power generating set is powered.
As example, according to the needs of wind power generating set, the electric pressure of the high-pressure side winding of transformator may be provided at
35kV, the electric pressure of low-pressure side winding A may be provided at 3000V, and the electric pressure of low-pressure side winding B may be provided at 100V.
Owing to the physical distance of transformator and current transformer is relatively near, can arrange with layer or the mode of layered arrangement is installed simultaneously
In same rack, to save installation cost.The low-pressure side winding A of transformator connects the grid side converter of current transformer, therebetween only
One-level low-side switch need to be set, to save distribution cost.Meanwhile, by the leakage inductance design corresponding for low-pressure side winding A of transformator
Must be higher, such as, its corresponding induction reactance perunit value is arranged on more than 5%, so, the grid side converter of current transformer is the most available should
The power interface of low-pressure side winding and leakage inductance realize AC-DC energy conversion and filter with current on line side, it is not necessary to arrange independent
Wave filter.
The leakage inductance that grid side converter utilizes the low-pressure side winding of transformator corresponding realizes AC-DC energy conversion as it
Filter inductance time, grid side converter must gather i.e. near the line voltage of electrical network side before this leakage inductance on controlling, real
Existing mode includes: 1, is arranged on by voltage sampling circuit on high voltage side of transformer winding and (now, can be not provided with low-pressure side winding
B)；2, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is with controller even
Connecing, controller realizes the control of voltage sample and grid side converter.
In this enforcement, in this enforcement two grid side converters of current transformer control on can use identical modulated signal with
And the carrier signal of phase 180 degree realizes the driving to its power semiconductor, thus utilize two set in transformator
Leakage inductance between low-pressure side winding A realizes the inside of switching harmonics electric current and offsets, and promotes and network electric energy quality.
Claims (10)
1. a wind power generating set, including the transformator being sequentially connected with, current transformer, electromotor, wind energy conversion system and tower；This unsteady flow
Device includes that controller controls grid side converter and the machine-side converter being connected and being connected by dc bus with this controller,
This grid side converter is electrically connected with this transformator, and this machine-side converter is electrically connected with this electromotor, this electromotor and this wind
Power machine is mechanically connected, and this wind energy conversion system is installed on this atop a tower, and the high-pressure side winding of this transformator passes through high side switch with outer
Portion's electrical network is connected；
It is characterized in that, the low-pressure side winding of this transformator includes the low-pressure side winding A of the most a set of offer power interface, each institute
State leakage inductance perunit value corresponding for low-pressure side winding A and be more than or equal to 5%, and by its power interface through low-side switch and described net
Side converter connects；
This current transformer includes the voltage sampling circuit being connected with described controller；This voltage sampling circuit is arranged on this transformator
On the winding of high-pressure side, or the low-pressure side winding of this transformator includes the low-pressure side winding B of the most a set of offer signaling interface, this electricity
Pressure sample circuit is arranged on the signaling interface of this low-pressure side winding B.
2. wind power generating set as claimed in claim 1, it is characterised in that described electromotor is double-fed type electromotor；
Described transformator includes a set of described low-pressure side winding A, and the power interface of this low-pressure side winding A is by low-side switch even
Connect the grid side converter of described current transformer, and connect the stator winding of described double-fed type electromotor through grid-connected switch；
Or described transformator includes two sets described low-pressure side winding A, the power interface of a set of described low-pressure side winding A1 is by low
Pressure side switch one is connected with the grid side converter of described current transformer, and the power interface of another set of described low-pressure side winding A2 is by low
Pressure side switch two is connected through the stator winding of grid-connected switch with described double-fed type electromotor.
3. wind power generating set as claimed in claim 2, it is characterised in that the voltage rating of described low-pressure side winding A2 is high
Voltage rating in described low-pressure side winding A1；The power interface of described low-pressure side winding A passes through stream by low-side switch
Protection device connects the grid side converter of described current transformer.
4. wind power generating set as claimed in claim 1, it is characterised in that described electromotor is synchronous generator or asynchronous
Motor；Described transformator includes a set of described low-pressure side winding A, and the power interface of this low-pressure side winding A passes through low-side switch
Connect the grid side converter of described current transformer through overcurrent protective device, it is fixed that the machine-side converter of this current transformer connects described electromotor
Son.
5. wind power generating set as claimed in claim 1, it is characterised in that described electromotor is synchronous generator or asynchronous
Motor；Described transformator includes at least two described low-pressure side winding A of set, and described current transformer comprises and the low-pressure side of described transformator
The grid side converter of the equal number of winding A；The low-pressure side winding A of described transformator and the grid side converter one of described current transformer
One correspondence is connected.
6. wind power generating set as claimed in claim 5, it is characterised in that the grid side converter of described current transformer is at DC side
After being connected in series or connecting side by side, it is connected with the DC side of described machine-side converter.
7. the wind power generating set as described in one of claim 1 to 6, it is characterised in that described low-pressure side winding B also provides for merit
Rate interface, the internal unit for wind power generating set is powered.
8. the wind power generating set as described in one of claim 1 to 6, it is characterised in that the low-pressure side leakage inductance of described transformator
Perunit value is more than or equal to high-pressure side leakage inductance perunit value.
9. the wind power generating set as described in one of claim 1 to 6, it is characterised in that described transformator and described current transformer
Layered arrangement is arranged in described tower；Or described transformator and described current transformer layered arrangement or arrange with layer and be arranged on one
In rack.
10. the wind power generating set as described in one of claim 1 to 6, it is characterised in that described low-side switch is arranged on institute
State in current transformer or be arranged in described transformator；Described voltage sampling circuit is voltage transformer, voltage hall sensor, electricity
Resistance bleeder circuit or linear optical coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817902.3A CN106329570A (en) | 2016-09-12 | 2016-09-12 | Wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817902.3A CN106329570A (en) | 2016-09-12 | 2016-09-12 | Wind turbine generator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106329570A true CN106329570A (en) | 2017-01-11 |
Family
ID=57787007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817902.3A Pending CN106329570A (en) | 2016-09-12 | 2016-09-12 | Wind turbine generator system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106329570A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004668A (en) * | 2018-07-26 | 2018-12-14 | 远景能源（江苏）有限公司 | The integrated grid integration method of wind powered generator system |
| CN110289636A (en) * | 2019-06-28 | 2019-09-27 | 东方电气风电有限公司 | It is a kind of based on frequency dividing/low frequency operation of power networks direct-drive type double-fed wind power generator group |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626163A (en) * | 2009-08-04 | 2010-01-13 | 清华大学 | Hybrid wind power generation system |
| CN101777826A (en) * | 2009-12-24 | 2010-07-14 | 艾默生网络能源有限公司 | Converter device and auxiliary circuit used for same |
| CN102074972A (en) * | 2010-12-23 | 2011-05-25 | 北京交通大学 | Energy feedback type traction power supply device with reactive compensation function and control method thereof |
| US20110134574A1 (en) * | 2009-12-31 | 2011-06-09 | General Electrical Company | Systems and apparatus relating to wind turbine electrical control and operation |
| CN104079184A (en) * | 2014-06-23 | 2014-10-01 | 周细文 | Wind power converter based on bipolar direct-current structure |
| CN204578110U (en) * | 2015-04-15 | 2015-08-19 | 深圳市长昊机电有限公司 | A kind of converter system and double-feedback aerogenerator group |
| CN205141697U (en) * | 2015-06-05 | 2016-04-06 | 江苏同芯电气科技有限公司 | Scene integration high -power topological structure of converter system that is incorporated into power networks |
| CN205509522U (en) * | 2016-03-15 | 2016-08-24 | 深圳市长昊机电有限公司 | Double -fed wind power generation converter and total power wind power generation converter |
| CN206117183U (en) * | 2016-09-12 | 2017-04-19 | 深圳市长昊机电有限公司 | Wind generating set |
-
2016
- 2016-09-12 CN CN201610817902.3A patent/CN106329570A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626163A (en) * | 2009-08-04 | 2010-01-13 | 清华大学 | Hybrid wind power generation system |
| CN101777826A (en) * | 2009-12-24 | 2010-07-14 | 艾默生网络能源有限公司 | Converter device and auxiliary circuit used for same |
| US20110134574A1 (en) * | 2009-12-31 | 2011-06-09 | General Electrical Company | Systems and apparatus relating to wind turbine electrical control and operation |
| CN102074972A (en) * | 2010-12-23 | 2011-05-25 | 北京交通大学 | Energy feedback type traction power supply device with reactive compensation function and control method thereof |
| CN104079184A (en) * | 2014-06-23 | 2014-10-01 | 周细文 | Wind power converter based on bipolar direct-current structure |
| CN204578110U (en) * | 2015-04-15 | 2015-08-19 | 深圳市长昊机电有限公司 | A kind of converter system and double-feedback aerogenerator group |
| CN205141697U (en) * | 2015-06-05 | 2016-04-06 | 江苏同芯电气科技有限公司 | Scene integration high -power topological structure of converter system that is incorporated into power networks |
| CN205509522U (en) * | 2016-03-15 | 2016-08-24 | 深圳市长昊机电有限公司 | Double -fed wind power generation converter and total power wind power generation converter |
| CN206117183U (en) * | 2016-09-12 | 2017-04-19 | 深圳市长昊机电有限公司 | Wind generating set |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004668A (en) * | 2018-07-26 | 2018-12-14 | 远景能源（江苏）有限公司 | The integrated grid integration method of wind powered generator system |
| CN110289636A (en) * | 2019-06-28 | 2019-09-27 | 东方电气风电有限公司 | It is a kind of based on frequency dividing/low frequency operation of power networks direct-drive type double-fed wind power generator group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6951542B2 (en) | Chain multi-port grid connection interface device and control method | |
| She et al. | Solid state transformer in the future smart electrical system | |
| US8270191B2 (en) | Power generation system, power converter system, and methods of converting power | |
| US9337685B2 (en) | Optimized filter for battery energy storage on alternate energy systems | |
| CN204967652U (en) | Subway energy feedback device | |
| CN110266034A (en) | A kind of offshore wind farm DC transmission system | |
| CN104953582A (en) | Three-phase power grid disturbance generating device and control method thereof | |
| CN108631355A (en) | Converter, electric control system and wind farm power transmission system | |
| CN204720981U (en) | A kind of three phase network disturbing generating device | |
| Mogstad et al. | Power collection and integration on the electric grid from offshore wind parks | |
| CN206117183U (en) | Wind generating set | |
| CN106329570A (en) | Wind turbine generator system | |
| CN201528280U (en) | Full power direct-drive type flexible grid-connection current transformer for wind turbine | |
| CN107666157B (en) | AC/DC series-parallel power grid | |
| CN100385766C (en) | Stator double winding asynchronous electrical machine matrix type collecting and generating system of wind force generating field on the sea | |
| CN207637603U (en) | A kind of automatic capacity transfer type distribution transformer | |
| CN105785176B (en) | A kind of more specification full-power wind power converter test platforms | |
| CN107171270B (en) | Intensive deicing device constant current, constant pressure modularization dynamic passive compensation component | |
| CN108899938A (en) | A kind of double-fed wind power generator group | |
| CN206117182U (en) | Photovoltaic power generation unit | |
| Limpaecher et al. | 750kW AC-link power converter for renewable generation and energy storage applications | |
| CN209324585U (en) | A kind of wind generator system | |
| CN203645529U (en) | Split type wind power converter | |
| Meier et al. | Benchmark of annual energy production for different wind farm topologies | |
| CN207801488U (en) | Current transformer, electric-control system and wind power plant transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |