CN206117183U - Wind generating set - Google Patents
Wind generating set Download PDFInfo
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- CN206117183U CN206117183U CN201621053968.1U CN201621053968U CN206117183U CN 206117183 U CN206117183 U CN 206117183U CN 201621053968 U CN201621053968 U CN 201621053968U CN 206117183 U CN206117183 U CN 206117183U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The utility model provides a wind generating set, is including the transformer, converter, generator, wind energy conversion system and the tower section of thick bamboo that connect gradually, net side and machine side converter that the converter includes the controller, is connected with the controller, net side converter is connected with the transformer, and the machine side converter is connected with the generator, and the generator is connected with the wind energy conversion system, and the wind energy conversion system is installed in tower bobbin top portion, and transformer high -pressure side winding is connected with outside electric wire netting through the high -pressure side switch, the transformer low voltage side winding includes the at least one set low tension side winding A who provides power interface, and winding A corresponds leakage inductance per -unit value more than or equal to 5% to be connected with net side converter through low - voltage switch through its power interface, the converter includes the voltage sampling circuit who is connected with the controller, and this circuit arrangement is on transformer high -pressure side winding, or the transformer low voltage side winding includes the at least one set low tension side winding B who provides signal interface, and this circuit arrangement is on winding B signal interface. The utility model discloses reduce wind generating set circuit cost and construction cost.
Description
Technical field
This utility model is related 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 shown in figure 1, existing double feed wind power generator group generally comprise be sequentially connected transformator, current transformer, generating
Machine, wind energy conversion system and tower (not shown).Wind energy conversion system includes blade and gear-box, and electromotor is 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 are 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 wave filter and stator switch etc., wherein, grid side converter and machine-side converter are female by direct current
Line connects, and net side wave filter is made up of filter inductance and filter capacitor, and grid side converter is opened by net side wave filter and low-pressure side
Pass is connected with transformator, and machine-side converter connects the rotor windings of double-fed generator, the stator winding Jing contacts of double-fed generator
Device and low-side switch are also connected with transformator.It is to power to the internal unit of wind power generating set, current transformer need to be matched somebody with somebody toward contact
Put auxiliary transformer.
As shown in Fig. 2 existing total power type wind power generating set generally comprise be sequentially connected transformator, current transformer, send out
Motor, wind energy conversion system and tower (not shown).Wind energy conversion system includes blade, and electromotor is mechanically connected with wind energy conversion system, is 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 are 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 wave filter etc., wherein, grid side converter and machine-side converter are connected by dc bus, net side filtering
Device is made up of filter inductance and filter capacitor, and grid side converter passes through net side wave filter and low-side switch is connected with transformator,
Machine-side converter connects the stator winding of either synchronously or asynchronously electromotor.It is to power to the internal unit of wind power generating set, unsteady flow
Device need to configure auxiliary transformer toward contact.
There is following defect in existing high-power wind-driven generator group：
First, transformator and current transformer are independent of one another on circuit, possess respective panel switches respectively, not only cause one
A little components repeat to arrange, and cannot also utilize transformator and the respective electric circuit characteristic of current transformer, reach simplified circuit structure, subtract
Few component, reduces the purpose of circuit cost.
Secondly as transformator and current transformer are installed on physical layout respectively independently of one another, usual current transformer is installed on
Inside tower, transformator is installed on outside tower, forms box type transformer, so as to cause the connection between transformator and current transformer
Generally require to lay longer high-current cable, increase the construction cost of wind power generating set.
Utility model content
The technical problems to be solved in the utility model is, there is provided a kind of wind power generating set, overcomes existing high-power wind
The high defect of the transformator of power generator group presence, converter circuit high cost, construction cost.
This utility model solves the technical scheme adopted by its technical problem：A kind of wind power generating set is constructed, including
Transformator, current transformer, electromotor, wind energy conversion system and the tower being sequentially connected；The current transformer includes that controller and the controller are controlled
The grid side converter for connecting and being connected by dc bus and machine-side converter, the grid side converter are electrically connected with the transformator
Connect, the machine-side converter is electrically connected with the electromotor, the electromotor is mechanically connected with the wind energy conversion system, the wind energy conversion system is installed on this
Atop a tower, the high-pressure side winding of the transformator are connected with external electrical network by high side switch；
Characterized in that, the low-pressure side winding of the transformator includes at least a set of low-pressure side winding A for providing power interface,
The corresponding leakage inductance perunit value of each low-pressure side winding A is more than or equal to 5%, and passes through its power interface Jing low-side switch and institute
State grid side converter connection；
The current transformer includes the voltage sampling circuit being connected with the controller；The voltage sampling circuit is arranged on the transformation
On the high-pressure side winding of device, or the low-pressure side winding of the transformator includes at least a set of low-pressure side winding B for providing signaling interface,
The voltage sampling circuit is arranged on the signaling interface of low-pressure side winding B.
In wind power generating set of the present utility model, the electromotor is double-fed type electromotor；
The transformator includes a set of low-pressure side winding A, and the power interface of low-pressure side winding A is opened by low-pressure side
Connection connects the grid side converter of the current transformer, and the stator winding of the Jing grid-connected switch connections double-fed type electromotor；
Or the transformator includes two sets of low-pressure side winding A, the power interface of a set of low-pressure side winding A1 leads to
The grid side converter that low-side switch one is crossed with the current transformer is connected, and the power interface of the another set of low-pressure side winding A2 leads to
Cross the grid-connected switches of two Jing of low-side switch to be connected with the stator winding of the double-fed type electromotor.
In wind power generating set of the present utility model, the voltage rating of the low-pressure side winding A2 is higher than the low pressure
The voltage rating of side winding A1；The power interface of the low-pressure side winding A is connected through stream protection device by low-side switch
Connect the grid side converter of the current transformer.
In wind power generating set of the present utility model, the electromotor is synchronous generator or asynchronous generator；It is described
Transformator includes a set of low-pressure side winding A, and the power interface of low-pressure side winding A is protected through stream by low-side switch
Device connects the grid side converter of the current transformer, and the machine-side converter of the current transformer connects the stator of the electromotor.
In wind power generating set of the present utility model, the electromotor is synchronous generator or asynchronous generator；It is described
Transformator includes at least two sets low-pressure side winding A, and the current transformer includes the phase with the low-pressure side winding A of the transformator
With the grid side converter of quantity；The low-pressure side winding A of the transformator corresponds phase with the grid side converter of the current transformer
Connection.
In wind power generating set of the present utility model, the grid side converter of the current transformer be connected in series in DC side or
After connecting side by side, it is connected with the DC side of the machine-side converter.
In wind power generating set of the present utility model, the low-pressure side winding B also provides power interface, is wind-power electricity generation
The internal unit of unit is powered.
In wind power generating set of the present utility model, the low-pressure side leakage inductance perunit value of the transformator is more than or equal to high pressure
Side leakage sense perunit value.
In wind power generating set of the present utility model, the transformator and the current transformer layered arrangement are arranged on described
In tower；The transformator and the current transformer layered arrangement or with layer arrangement in a rack.
In wind power generating set of the present utility model, the low-side switch is arranged in the current transformer or is arranged on
In the transformator；The voltage sampling circuit is voltage transformer, voltage hall sensor, resistor voltage divider circuit or linear
Optocoupler.
Implement wind power generating set of the present utility model, compared with the prior art, its advantage is：
1. the transformator and 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, need not arrange current transformer filter circuit, while reducing low-pressure side
The usage quantity of switch, reduces the circuit cost of wind power generating set；
2. the transformator and 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 installing, reduces wind power generating set
Construction cost.
Description of the drawings
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 is the basic composition schematic diagram of this utility model wind power generating set.
Fig. 4 is the system composition schematic diagram (double-fed) of this utility model wind power generating set embodiment one.
Fig. 5 is the system composition schematic diagram (double-fed) of this utility model wind power generating set embodiment two.
Fig. 6 is the system composition schematic diagram (total power type) of this utility model wind power generating set embodiment three.
Fig. 7 is the system composition schematic diagram (total power type) of this utility model wind power generating set example IV.
Fig. 8 is the system composition schematic diagram (total power type) of this utility model wind power generating set embodiment five.
Specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail：
As shown in figure 3, wind power generating set of the present utility model include being sequentially connected transformator, current transformer, electromotor,
Wind energy conversion system and tower (not shown).
Current transformer includes controller, grid side converter and machine-side converter.Grid side converter is with machine-side converter by straight
Stream bus is connected, and is connected with controller control 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
When ensure that the corresponding leakage inductance perunit values of low-pressure side winding A are more than or equal to 5%, by the power interface Jing low pressure of low-pressure side winding A
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 the voltage sampling circuit is arranged on the signaling interface of low-pressure side winding B,
And be connected with controller.
Voltage sampling circuit is the element for obtaining information of voltage, including 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 into transformation
On the winding of device high-pressure side, and it is connected with controller.
Embodiment one
As shown in figure 4, wind power generating set of the present utility model includes that the transformator being sequentially connected, current transformer, double-fed are sent out
Motor, wind energy conversion system and tower (not shown).Wherein：
Current transformer includes controller, low-side switch, catalyst, fuse, the net side conversion connected by dc bus
Device and machine-side converter.The grid side converter of current transformer is passed through fuse and low-side switch and is electrically connected with transformator, 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 pass through catalyst and
Low-side switch is electrically connected with transformator, and rotor and the wind energy conversion system of double-fed generator are mechanically connected.Wind energy conversion system include blade and
Gear-box, is installed on the top of tower.Wherein, catalyst, can be exchanged using the grid-connected switch such as IGCT, chopper, fuse
The overcurrent protective devices such as device, chopper can be exchanged.
In other embodiments, the overcurrent protective devices such as fuse are not provided with, current transformer grid side converter is directly by low
Pressure side switch and transformator electrical connection, do not affect the realization of the basic goal of the invention of this utility model.
In the present embodiment, transformator includes high-pressure side winding and three class low-pressure side windings, 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, by 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
It is standby to be powered using other modes, for example, powered using accumulator mode.
The electric pressure of high voltage side of transformer winding according to wind power generating set need arrange, for example, 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 the consumption of the high-current cable that transformator and current transformer are 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, need to only arrange one-level low-side switch therebetween,
Save distribution cost.Meanwhile, the corresponding leakage inductances of low-pressure side winding A of transformator can be designed to higher, for example, be corresponded to
Induction reactance perunit value is arranged on more than 5%, and so, the grid side converter of current transformer is just using the power interface of the low-pressure side winding
Realize that AC-DC energy conversion is filtered with current on line side with leakage inductance, original separate filter need not be set (comprising filtered electrical
Sense and filter capacitor).
Grid side converter realizes AC-DC energy conversion as which by the use of the corresponding leakage inductance of low-pressure side winding of transformator
Filter inductance when, grid side converter must gather the leakage inductance in control before i.e. near the line voltage of electrical network side, it is real
Existing mode includes：1st, voltage sampling circuit is arranged on high voltage side of transformer winding and (low-pressure side winding now, can be not provided with
B.)；2nd, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit and controller
Connection.
Low-pressure side winding B and the 3rd class low-pressure side winding in the present embodiment can also be shared, that is, be not provided with the 3rd class low
Pressure side winding, exports the internal unit to wind power generating set using low-pressure side winding B and powers.
Embodiment two
As shown in figure 5, the wind power generating set of the present embodiment include being sequentially connected transformator, current transformer, doubly-fed generation
Machine, wind energy conversion system and tower (not shown).Wherein：
Current transformer includes controller, catalyst and grid side converter and machine-side converter by dc bus connection.
The grid side converter of current transformer is electrically connected with transformator by low-side switch II, and machine-side converter and the double-fed of current transformer are sent out
The rotor windings electrical connection of motor；The stator winding of double-fed generator passes through catalyst and low-side switch I with 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 two class low-pressure sides of low-pressure side winding B 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
Pass is connected with external electrical network；Low-pressure side winding A includes the winding of two sets of offer power interfaces, 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 of 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 an example, the needs according to wind power generating set, the electric pressure of high voltage side of transformer winding may be provided at
The electric pressure of 35kV, first set low-pressure side winding A1 may be provided at 690V, and the electric pressure of second set of low-pressure side winding A2 can
3000V is arranged on, the electric pressure of low-pressure side winding B may be provided at 690V.Here, second set of low-pressure side winding A2 is due to connection
The stator winding of double-fed generator, it is not necessary to through the grid side converter and machine of the current transformer comparatively sensitive to electric pressure
Side converter, thus its electric pressure can arrange must be higher than the electric pressure of first set low-pressure side winding A1, send out so as to reduce double-fed
The electric current of the stator branch road of motor, and corresponding catalyst, the current class of low-side switch I, the economy of lift system.
As the physical distance of transformator and current transformer is nearer, it can be arranged in tower simultaneously in the way of layered arrangement,
To save installation cost.
The first set low-pressure side winding A1 of transformator connects the grid side converter of current transformer, need to only arrange one-level low pressure therebetween
Side switchs II, and second set of low-pressure side winding A2 of transformator connects the stator winding of double-fed generator, also need to only arrange one therebetween
Level low-side switch I, these all save distribution cost.
Meanwhile, the corresponding leakage inductances of first set low-pressure side winding A1 of transformator are designed to higher, for example, are corresponded to sense
Anti- perunit value is arranged on more than 5%.So, the grid side converter of current transformer just using the low-pressure side winding power interface and
Leakage inductance realizes that AC-DC energy conversion is filtered with current on line side, need not arrange independent wave filter (comprising filter inductance, filter
Ripple electric capacity).
Grid side converter realizes AC-DC energy conversion as which by the use of the corresponding leakage inductance of low-pressure side winding of transformator
Filter inductance when, grid side converter must gather the leakage inductance in control before i.e. near the line voltage of electrical network side, it is real
Existing mode includes：1st, voltage sampling circuit is arranged on high voltage side of transformer winding and (low-pressure side winding now, can be not provided with
B)；2nd, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is connected with controller
Connect, controller realizes the control of voltage sample and grid side converter.
Embodiment three
As shown in fig. 6, the wind power generating set of the present embodiment include being sequentially connected 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, machine-side converter and the electromotor of current transformer
Stator winding is electrically connected；Electromotor is either synchronously or asynchronously electromotor, and its rotor is mechanically connected with wind energy conversion system；Wind energy conversion system includes leaf
Piece, 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 low-side switch and the net side of 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, the internal unit of wind power generating set is powered.
As an example, the needs according to 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.
Due to the physical distance of transformator and current transformer it is nearer, can integrated installation (with layer arrange or layered arrangement) same
In individual cabinet, to save installation cost.
The low-pressure side winding A of transformator connects the grid side converter of current transformer, need to only arrange one-level low tension switch therebetween, with
Save distribution cost.Meanwhile, the corresponding leakage inductances of low-pressure side winding A of transformator are designed to higher, for example, are corresponded to induction reactance
Perunit value is arranged on more than 5%.So, the grid side converter of current transformer is just using power interface and the leakage of the low-pressure side winding
Sense realizes that AC-DC energy conversion is filtered with current on line side, and need not arrange independent wave filter (includes filter inductance, filtering
Electric capacity).
Grid side converter realizes AC-DC energy conversion as which by the use of the corresponding leakage inductance of low-pressure side winding of transformator
Filter inductance when, grid side converter must gather the leakage inductance in control before i.e. near the line voltage of electrical network side, it is real
Existing mode includes：1st, voltage sampling circuit is arranged on high voltage side of transformer winding and (low-pressure side winding now, can be not provided with
B)；2nd, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is connected with controller
Connect, controller realizes the control of voltage sample and grid side converter.
Example IV
As shown in fig. 7, the wind power generating set of the present embodiment include being sequentially connected transformator, current transformer, electromotor, wind
Power machine and tower (not shown).Wherein：
Current transformer includes controller and two grid side converters and two machine-side converters by dc bus connection,
In DC side parallel, AC then passes through low-side switch I and low-side switch II to two grid side converters of current transformer respectively
It is electrically connected with transformator；Two machine-side converters of current transformer are in parallel in DC side, AC, and AC is determined with electromotor
Sub- winding electrical connection；Electromotor is either synchronously or asynchronously electromotor, and its rotor is mechanically connected with wind energy conversion system；Wind energy conversion system includes leaf
Piece, is installed on atop a tower.
In other embodiments, the grid side converter of current transformer and machine-side converter quantity are equal and respectively 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 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
Connection；Low-pressure side winding A includes the winding of two sets of offer power interfaces, and its output voltage grade quite, and passes through low pressure respectively
Switch I, II are connected with two grid side converters of current transformer for side；Low-pressure side winding B provides signaling interface, the control with current transformer
Device processed is connected.
As an example, the needs according to 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.
As the physical distance of transformator and current transformer is nearer, it can be arranged in tower simultaneously in the way of layered arrangement,
To save installation cost.
The low-pressure side winding A of transformator connects the grid side converter of current transformer, need to only arrange one-level low-side switch therebetween,
To save distribution cost.Meanwhile, the corresponding leakage inductances of low-pressure side winding A of transformator are designed to higher, for example, are corresponded to sense
Anti- perunit value is arranged on more than 5%, so, the grid side converter of current transformer just using the low-pressure side winding power interface and
Leakage inductance realizes that AC-DC energy conversion is filtered with current on line side, need not arrange independent wave filter.
Grid side converter realizes AC-DC energy conversion as which by the use of the corresponding leakage inductance of low-pressure side winding of transformator
Filter inductance when, grid side converter must gather the leakage inductance in control before i.e. near the line voltage of electrical network side, it is real
Existing mode includes：1st, voltage sampling circuit is arranged on high voltage side of transformer winding and (low-pressure side winding now, can be not provided with
B)；2nd, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is connected with controller
Connect, controller realizes the control of voltage sample and grid side converter.
In this enforcement, two grid side converters of current transformer can adopt identical modulated signal and phase place phase in control
The carrier signal of difference 180 degree realizing the driving to its power semiconductor, so as to using two sets of low-pressure sides in transformator around
Leakage inductance between group A realizes that the inside of switching harmonics electric current offsets, and is lifted and network electric energy quality.
Embodiment five
As shown in figure 8, the wind power generating set of the present embodiment include being sequentially connected transformator, current transformer, electromotor, wind
Power machine and tower (not shown).Wherein：
Current transformer includes controller and two grid side converters and a machine-side converter by dc bus connection.Become
Two grid side converters of stream device are connected in DC side, and AC then passes through low-side switch I, II respectively and transformator electrically connects
Connect.The machine-side converter of current transformer, the dc bus after one end is connected with two grid side converter DC sides are electrically connected, another
End is electrically connected with the stator winding of electromotor.Electromotor is either synchronously or asynchronously electromotor, its rotor and wind energy conversion system machinery
Connection；Wind energy conversion system includes blade, is installed on the top of the tower.
In other embodiments, the grid side converter quantity of current transformer can be two or more, and machine-side converter can also
It is 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, II corresponding with low-pressure side winding A.Wherein, high-pressure side winding passes through high side switch and external electrical
Net is connected；Low-pressure side winding A includes the winding of two sets of offer power interfaces, and its output voltage grade quite, and passes through respectively
Low-side switch I, II is 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 an example, the needs according to wind power generating set, the electric pressure of the high-pressure side winding of transformator may be provided at
The electric pressure of 35kV, 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.
As the physical distance of transformator and current transformer is nearer, can be installed in the way of same layer arrangement or layered arrangement 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, the low-pressure side winding A of transformator corresponding leakage inductance is designed
Obtain higher, for example, corresponded to induction reactance perunit value and be arranged on more than 5%, so, the grid side converter of current transformer is just using this
The power interface and leakage inductance of low-pressure side winding realizes that AC-DC energy conversion is filtered with current on line side, need not arrange independent
Wave filter.
Grid side converter realizes AC-DC energy conversion as which by the use of the corresponding leakage inductance of low-pressure side winding of transformator
Filter inductance when, grid side converter must gather the leakage inductance in control before i.e. near the line voltage of electrical network side, it is real
Existing mode includes：1st, voltage sampling circuit is arranged on high voltage side of transformer winding and (low-pressure side winding now, can be not provided with
B)；2nd, voltage sampling circuit is arranged on the signaling interface of step down side winding B.Voltage sampling circuit is connected with controller
Connect, controller realizes the control of voltage sample and grid side converter.
In this enforcement, in this enforcement two grid side converters of current transformer identical modulated signal can be adopted in control with
And the carrier signal of phase 180 degree is realizing the driving to its power semiconductor, so as to using two sets in transformator
Leakage inductance between low-pressure side winding A realizes that the inside of switching harmonics electric current offsets, and is lifted and network electric energy quality.
Claims (10)
1. a kind of wind power generating set, including the transformator, current transformer, electromotor, wind energy conversion system and the tower that are sequentially connected；The unsteady flow
Device includes the grid side converter and machine-side converter that controller connected and be connected by dc bus with controller control,
The grid side converter and transformator electrical connection, the machine-side converter and electromotor electrical connection, the electromotor and the wind
Power machine is mechanically connected, and the wind energy conversion system is installed on the atop a tower, the high-pressure side winding of the transformator by high side switch with it is outer
Portion's electrical network is connected；
Characterized in that, the low-pressure side winding of the transformator includes at least a set of low-pressure side winding A for providing power interface, each institute
The corresponding leakage inductance perunit values of low-pressure side winding A are stated more than or equal to 5%, and passes through its power interface Jing low-side switch and the net
Side converter connects；
The current transformer includes the voltage sampling circuit being connected with the controller；The voltage sampling circuit is arranged on the transformator
On the winding of high-pressure side, or the low-pressure side winding of the transformator includes at least a set of low-pressure side winding B for providing signaling interface, the electricity
Pressure sample circuit is arranged on the signaling interface of low-pressure side winding B.
2. wind power generating set as claimed in claim 1, it is characterised in that the electromotor is double-fed type electromotor；
The transformator includes a set of low-pressure side winding A, and the power interface of low-pressure side winding A is connected by low-side switch
Connect the grid side converter of the current transformer, and the stator winding of the Jing grid-connected switch connections double-fed type electromotor；
Or the transformator includes two sets of low-pressure side winding A, the power interface of a set of low-pressure side winding A1 is by low
Pressure side switch one is connected with the grid side converter of the current transformer, and the power interface of the another set of low-pressure side winding A2 is by low
Pressure side is switched the grid-connected switches of two Jing and is connected with the stator winding of the double-fed type electromotor.
3. wind power generating set as claimed in claim 2, it is characterised in that the voltage rating of the low-pressure side winding A2 is high
In the voltage rating of the low-pressure side winding A1；The power interface of the low-pressure side winding A is by low-side switch through flowing
Protection device connects the grid side converter of the current transformer.
4. wind power generating set as claimed in claim 1, it is characterised in that the electromotor is synchronous generator or asynchronous
Motor；The transformator includes a set of low-pressure side winding A, and the power interface of low-pressure side winding A passes through low-side switch
Connect the grid side converter of the current transformer through flowing protection device, the machine-side converter of the current transformer connects the electromotor
Stator.
5. wind power generating set as claimed in claim 1, it is characterised in that the electromotor is synchronous generator or asynchronous
Motor；The transformator includes at least two sets low-pressure side winding A, and the current transformer includes the low-pressure side with the transformator
The grid side converter of the equal number of winding A；The low-pressure side winding A of the transformator and the grid side converter one of the 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 the current transformer is in DC side
After being connected in series or connecting side by side, it is connected with the DC side of the machine-side converter.
7. the wind power generating set as described in one of claim 1 to 6, it is characterised in that the low-pressure side winding B also provides work(
Rate interface, is that the internal unit of 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 the 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 the transformator and the current transformer
Layered arrangement is arranged in the tower；The transformator and the current transformer layered arrangement or with layer arrangement installed in one
In rack.
10. the wind power generating set as described in one of claim 1 to 6, it is characterised in that the low-side switch is arranged on institute
State in current transformer or be arranged in the transformator；The 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 |
|---|---|---|---|
| CN201621053968.1U CN206117183U (en) | 2016-09-12 | 2016-09-12 | Wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053968.1U CN206117183U (en) | 2016-09-12 | 2016-09-12 | Wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206117183U true CN206117183U (en) | 2017-04-19 |
Family
ID=58520426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621053968.1U Active CN206117183U (en) | 2016-09-12 | 2016-09-12 | Wind generating set |
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| Country | Link |
|---|---|
| CN (1) | CN206117183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329570A (en) * | 2016-09-12 | 2017-01-11 | 深圳市长昊机电有限公司 | Wind turbine generator system |
| CN107769233A (en) * | 2017-11-21 | 2018-03-06 | 清华大学 | A kind of low capacity compression air energy-storing apparatus and its combination method |
-
2016
- 2016-09-12 CN CN201621053968.1U patent/CN206117183U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329570A (en) * | 2016-09-12 | 2017-01-11 | 深圳市长昊机电有限公司 | Wind turbine generator system |
| CN107769233A (en) * | 2017-11-21 | 2018-03-06 | 清华大学 | A kind of low capacity compression air energy-storing apparatus and its combination method |
| CN107769233B (en) * | 2017-11-21 | 2019-03-29 | 清华大学 | A kind of low capacity compression air energy-storing apparatus and its combination method |
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