CN108199594A - High-voltage direct-current generator, wind generating set and wind farm - Google Patents
High-voltage direct-current generator, wind generating set and wind farm Download PDFInfo
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- CN108199594A CN108199594A CN201710398680.0A CN201710398680A CN108199594A CN 108199594 A CN108199594 A CN 108199594A CN 201710398680 A CN201710398680 A CN 201710398680A CN 108199594 A CN108199594 A CN 108199594A
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- 238000004804 winding Methods 0.000 claims abstract description 111
- 230000005540 biological transmission Effects 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000004422 calculation algorithm Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000013461 design Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
- H02J3/472—For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a high-voltage direct-current generator, a wind generating set and a wind farm. The high voltage direct current generator comprises: the alternating-current multi-winding generator comprises N three-phase windings, wherein N is an integer greater than 1; 3N single-phase winding control circuits for rectifying alternating current output from respective single-phase windings of an alternating current multiple winding generator, each single-phase winding control circuit comprising: an ac input terminal for receiving an ac current from a corresponding one of the single-phase windings of the ac multi-winding generator, and a dc output terminal for outputting a dc current generated by rectifying the received ac current, the dc output terminals of the respective single-phase winding control circuits being connected in series in sequence to constitute a high-voltage dc output terminal, the high-voltage dc output terminal outputting a high-voltage dc current obtained by superimposing dc potentials at the dc output terminals of the respective single-phase winding control circuits; and the generator output controller is used for controlling each single-phase winding control circuit to carry out rectification operation.
Description
Technical field
The present invention relates to electrical generator fields, more particularly, it is related to a kind of to export constant high-voltage direct current
High tension direct current generator, wind power generating set and wind power plant including the high tension direct current generator.
Background technology
Direct-driving type generating set generally use large volume based on permanent magnet generator, high-power, the slow-speed of revolution generator.Example
Such as, in wind generator system, generator output power is usually required by being transmitted to bottom of towe power electronics current converter in tower,
Then wind-powered electricity generation field areas public exchange power grid is accessed through Industrial Frequency Transformer.The output of this generator is generally configured with following characteristics：
Low-voltage time variant voltage, 3 phase exchanges, Frequency etc..
However, there are many deficiencies in a particular application for this generator.First, generator cannot be directly incorporated into alternating current
Net or DC grid, and need installation power electronics current converter that can just be incorporated to AC network or DC grid.Second, generator
Operating voltage is low, thus cause power transmission high cost in wind power generating set tower (including high cable cost and by
Pylon and pylon inner cable installation cost caused by the weight of a large amount of cables).Power electronics change of current dress under third, low-voltage
High heat dissipation cost can be led to by putting.
In general, the wind power plant with multiple this generators will use exchange connect-in strategy, that is, multiple generators pass through
Convertor equipment incoming transport power grid.Exchange connect-in strategy is the electric power connect-in strategy of comparative maturity in the world at present, however, its
Application on wind-power electricity generation airport still has some shortcomings.First, the inertia of wind power generating set respectively expresses and is input to friendship
Power bus is flowed, in extensive multiple spot and fashionable, these inertia can cause grid-connected endpoint complexity low frequency power to couple, and be easy to cause
Power grid low frequency problem.Second, wind power plant is interior to be transmitted using 3 lines, and aerial corridor is larger, takes up a large area.Third, large scale wind hair
The pylon of motor group is very high, and the dosage of 3 phase ac cables is very big in tower, and very big pylon structure is caused to bear, and directly electricity
Cable cost is very high.When exchange transmission the 4th, is carried out in the specific region in such as sea, due to capacity effect caused by seawater,
AC system power transmission will be caused difficult, so as to cause very high power transmission cost.
Invention content
Therefore, the purpose of the present invention is to provide a kind of high tension direct current generator, including the high tension direct current generator
Wind power generating set and wind power plant, the high tension direct current generator can export constant high-voltage direct current, be exported for wind-powered electricity generation
Realize that direct current transmission provides antecedent basis, so as to avoid existing multiple wind power generating set inertia using exchange transmission directly simultaneously
The possible low frequency oscillation of AC network caused by entering power grid；In addition, it is using the direct current transmission cable in wind power generating set tower
Can transmission of high-voltage direct current electric current, desired excessive biography when can overcome 3 lines transmission in the wind power generating set of existing exchange output
The problem of defeated corridor, high power transmission cost and pylon cost caused by reduction tower inner cable usage amount is excessive.
According to an aspect of the present invention, a kind of high tension direct current generator is provided, the high tension direct current generator includes：Exchange
Multi-winding generator, including N number of three-phase windings, wherein, N is the integer more than 1；3N single-phase winding control circuits, for pair
The alternating current of each single-phase winding output of the exchange multi-winding generator carries out rectification, wherein, each single-phase winding control
Circuit processed includes：Exchange for the corresponding one single-phase winding reception alternating current from the exchange multi-winding generator is defeated
Enter end and, for exporting the DC output end of DC current for carrying out rectification to the alternating current of reception and generating, wherein,
The DC output end of each single-phase winding control circuit is sequentially connected in series, so as to form high voltage direct current output terminal, the high voltage direct current
The high voltage direct current that output terminal exports the DC potential of the DC output end by being superimposed each single-phase winding control circuit to obtain
Electric current；Generator o controller, for each single-phase winding control circuit to be controlled to carry out rectifying operation.
Preferably, the exchange multi-winding generator further includes the winding that tests the speed, described to test the speed winding for measuring each list
The angle information of the alternating current of phase winding；The generator o controller is connect with the winding that tests the speed, for according to survey
The angle information of the alternating current of each single-phase winding measured, each single-phase winding control circuit of control carry out rectification
Operation.
Preferably, the generator o controller is used to receive generator torque information from generator external control system
Or generator torque information is calculated based on the generator torque computational algorithm being pre-designed, it is calculated using the torque information each
The amplitude information of the alternating current of a single-phase winding, and the angle information and amplitude of the alternating current according to each single-phase winding
Information generates control signal and carries out rectifying operation according to each single-phase winding control circuit of control signal control.
Preferably, each single-phase winding control circuit includes：H bridge rectification circuits, by the ac input end from exchange
Corresponding one single-phase winding of multi-winding generator receives alternating current, and it is straight to generate to carry out rectification to the alternating current of reception
Galvanic electricity stream, and pass through the DC current that the DC output end output generates；Capacitor, in the DC output end and the H
Bridge rectification circuit is connected in parallel；Diode is connected in parallel in the DC output end and the H bridge rectification circuits.
Preferably, each single-phase winding control circuit further includes：Driving circuit, for receiving the generator output control
The control signal that device generates, and drive each electronic power switch in the H bridge rectification circuits first according to the control signal
Part is connected and/or is disconnected, to carry out rectification to the alternating current.
Preferably, the driving circuit includes：Interface unit, for receiving the control from the generator o controller
Signal processed；Control unit drives each power electronics in the H bridge rectification circuits to open for being generated according to the control signal
Close the drive signal of element switches and/or disconnection；Driving unit, for the drive signal to be applied to the H bridges rectified current
Each electronic power switch element in road, to drive each electronic power switch element switches and/or disconnection；Voltage/
Current sampling unit samples for the voltage/current to the H bridge rectification circuits, and sampled result is fed back to described
Control unit, to adjust the drive signal；Power supply unit, for for the drive circuitry.
According to another aspect of the present invention, a kind of wind power generating set is provided, the wind power generating set includes as above institute
The high tension direct current generator stated.
Preferably, the wind power generating set further includes the direct current handling cable being connect with the high tension direct current generator,
The direct current handling cable is arranged on inside the tower of the high tension direct current generator, and is passed using high voltage direct current two-wire system power
Defeated pattern.
According to another aspect of the present invention, a kind of wind power plant is provided, the wind power plant includes：At least one wind as described above
Power generator group；And online inverter is concentrated, for receiving the high-voltage direct current of the wind power generating set output, and will
The high-voltage direct current is converted to high-voltage ac current to access public electric wire net.
Preferably, the wind power plant further includes：Public network transformer connects the concentration online inverter and the common electrical
Net；Or/also, wind power plant control device, for stablizing the high-voltage direct current of the multiple wind power generating set output, and
Power dispatching control is carried out to the multiple wind power generating set.
Description of the drawings
Through a description of the embodiment given below with reference to the drawings, these and or other aspects of the invention and advantage will
It can become apparent and it is more readily appreciated that in the accompanying drawings：
Fig. 1 is the diagram for the structure for showing high tension direct current generator according to embodiments of the present invention；
Fig. 2 is showing for the structure for the single-phase winding control circuit for showing high tension direct current generator according to embodiments of the present invention
Figure；
Fig. 3 is the schematic representation for showing wind power plant according to embodiments of the present invention.
Specific embodiment
Hereinafter with reference to attached drawing, the present invention is more fully described, exemplary implementation the invention is shown in the accompanying drawings
Example.However, the present invention can be implemented in many different forms, and it should not be construed as limited to the reality proposed herein
Apply example.On the contrary, these embodiments are provided so that the disclosure will be thorough and complete, and the scope of the present invention is fully conveyed
To those skilled in the art.In the accompanying drawings, identical label always shows identical element.
It should be understood that although term first, second, third, etc. can be used herein to describe different elements, group
Part, region, layer and/or part, but these elements, component, region, layer and/or part should not be limited by these terms.
These terms are intended merely to an element, component, region, layer or part and another element, component, region, layer or part
It distinguishes.Therefore, without departing from the teachings of the present invention, first element discussed below, component, region, layer or
Part can be referred to second element, component, region, layer or part.As used herein, term "and/or" include one or
The arbitrary combination and all combinations of multiple correlation institutes list.
Term used herein is not intended to limit the present invention only for describing the purpose of specific embodiment.Such as institute here
It uses, unless the context clearly indicates otherwise, otherwise singulative is also intended to include plural form.It will also be appreciated that work as
When using term "comprising" and/or " comprising " in the present specification, illustrate that there are the feature, entirety, step, operation, elements
And/or component, but do not preclude the presence or addition of one or more of the other feature, entirety, step, operation, element, component and/or
Their group.
Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have and this hair
Bright those of ordinary skill in the art the normally understood meaning equivalent in meaning.It will be further understood that unless here clearly
Definition, otherwise term (term such as defined in common dictionary) it should be interpreted as having in the environment with related field
The meaning consistent meaning, and they will not be explained with ideal or too formal meaning.
Hereinafter, the present invention is explained in detail with reference to the accompanying drawings.
Fig. 1 is the diagram for the structure for showing high tension direct current generator according to embodiments of the present invention.
With reference to Fig. 1, the high tension direct current generator includes exchange multi-winding generator 1, multiple single-phase winding controls (SM)
Circuit 2 and generator o controller 3.According to embodiments of the present invention, multi-winding generator 1, multiple SM circuits 2 and power generation are exchanged
Machine o controller 3 is connected to each other by local bus in the highly reliable anti-interference motor of high speed.Here, the local bus has
At a high speed (>100MBPS) high reliability feature.However, the present invention is not limited thereto, exchange Multiple coil can be connected by various buses and is sent out
Motor 1, multiple single-phase winding control (SM) circuits 2 and generator o controller 3.
Exchange multi-winding generator 1 include it is N number of output 120 degree of mutual deviation three-phase windings (R1a, R1b, R1c ... RNa,
RNb、RNc).Here, N can be the integer more than 1.The winding insulation of each winding increases into echelon, and often set winding holds
Amount can be unequal.Selectively, exchange multi-winding generator 1 may also include the winding that tests the speed (for example, three-phase or two-phase are surveyed
Fast winding), for measure exchange multi-winding generator 1 location information, that is, exchange multi-winding generator 1 it is each it is single-phase around
The angle information of the alternating current of group.In addition, outer rotor designs or internal rotor design can be used in exchange multi-winding generator 1, this
Invention is to this without any restrictions.
Multiple SM circuits 2 carry out rectification to the alternating current of each single-phase winding output of exchange multi-winding generator 1.It is more
The quantity of a SM circuits 2 can be 3N.That is, each SM circuits 2 correspond to a list of exchange multi-winding generator 1
Phase winding.Each SM circuits 2 may include receiving alternating current from corresponding one single-phase winding of exchange multi-winding generator
The ac input end of stream and the direct current output of DC current generated for exporting the alternating current progress rectification to reception
End.The alternating current rectification of multiple single-phase winding outputs can be the mutually the same multiple DC currents of level by multiple SM circuits 2,
It also can be by the alternating current rectification of the multiple single-phase winding outputs multiple DC currents different from each other for level.Each SM circuits 2
DC output end be one another in series, the high-voltage dc transmission generated so as to form output by being superimposed each single-phase winding control circuit
The DC potential of outlet and the high-voltage direct current U obtainedDCHigh voltage direct current output terminal.
Generator o controller 3 is used to that each SM circuits 2 to be controlled to carry out rectifying operation.Therefore, it exports and controls in generator
Under the control of device 3 processed, multiple SM circuits 2 can jointly export constant high-voltage direct current.That is, each winding
Capacity can be with custom design, and multiple SM circuits 2 can control as obtained from the alternating current rectification to corresponding single-phase winding
The amplitude of DC current, so as to jointly export constant high-voltage direct current.
In particular, generator o controller 3 can receive the angle of the alternating current of each single-phase winding from the winding that tests the speed
Spend information.Here, the angle information of the alternating current of each A phase windings can be mutually the same, the alternating current of each B phase windings
Angle information can be mutually the same, the angle information of the alternating current of each C phase windings can be mutually the same.Meanwhile it generates electricity
Machine o controller 3 can also receive generator torque information from generator master control system, be calculated using the torque information each
The amplitude information of the alternating current of single-phase winding.Generator o controller 3 can be based on high tension direct current generator design specification or
The design specification of wind power plant of the person based on the wind power generating set including being made of high tension direct current generator, according to it is each it is single-phase around
The angle information and amplitude information of the alternating current of group generate the control letter for each SM circuits 2 to be controlled to carry out rectifying operation
Number.Here, various methods can be used to calculate the amplitude of the alternating current of each single-phase winding letter in generator o controller 3
Breath, and the control signal for each SM circuits 2 to be controlled to carry out rectifying operation is generated using various methods, it is no longer superfluous here
It states.By the way that the control signal of generation is applied to each SM circuits 2, generator o controller 3 can control each SM circuits 2
By the alternating current rectification of the corresponding single-phase winding multiple DC currents mutually the same for level, each SM circuits can also be controlled
2 by the alternating current rectification of the corresponding single-phase winding multiple DC currents different from each other for level.Meanwhile by by different controls
Signal processed is applied to each SM circuits 2, and generator o controller 3 can control each SM circuits 2 to adjust by corresponding single
The alternating current of phase winding carries out the level of the DC current of rectification acquisition.
Selectively, generator o controller 3 can also calculate hair based on the generator torque computational algorithm being pre-designed
Motor torque information.The computational algorithm can use each of the calculating generator torque of the prior art by those skilled in the art
Kind method is designed as the case may be, and which is not described herein again.
According to embodiments of the present invention, since SM circuits 2 are using modularized design and in the high tension direct current generator
Using local bus in the highly reliable anti-interference motor of high speed, therefore each SM circuits 2 can be with corresponding single-phase winding in space
Above so must you is arranged close to.That is, each SM circuits 2 can be at pole with corresponding single-phase winding on space length
Near distance (for example, " 0 " distance).In general, the distance is considered that 10m will not be no more than.However, the present invention is not limited thereto, it should
Distance (for example, 10m) is only by the reality of generator (that is, each single-phase winding) and power electronic equipment (that is, each SM electric currents 2)
The position of space layout limits.
Fig. 2 is showing for the structure for the single-phase winding control circuit for showing high tension direct current generator according to embodiments of the present invention
Figure.
With reference to Fig. 2, SM circuits 2 may include H bridge rectification circuits 21, capacitor 22 and diode 23.H bridge rectification circuits 21 can
Including four electronic power switch elements (S1 to S4), each electronic power switch element may include a controllable power semiconductor
Device (for example, IGBT, MOSFET etc.) and one and the antiparallel protection diode of controllable power semiconductor device.H bridges are whole
Current circuit 21 can be received from corresponding one single-phase winding of exchange multi-winding generator by the ac input end of SM circuits 2 and be handed over
Galvanic electricity stream carries out rectification to generate DC current to the alternating current of reception, and passes through the DC output end output production of SM circuits 2
Raw DC current.The rectification operation principle of H bridge rectification circuits 21 is known to those skilled in the art, and it is specific to omit it here
Description.Capacitor 22 is connected in parallel in DC output end and H bridge rectification circuits, for being carried out to the output of H bridge rectification circuits 21
Power buffers and voltage support.Diode 23 is used to ensure in single-phase winding failure corresponding with SM circuits 2 or SM circuits 2
Other elements failure in the case of, the cascaded structure of the DC output end of each SM circuits 2 remains to work normally.According to this hair
Bright embodiment, each electronic power switch element inverse parallel of diode 23 and H bridge rectification circuits 21, therefore work as and SM circuits 2
During other elements failure in corresponding single-phase winding failure or SM circuits 2, diode 23 is connected, so that it is guaranteed that the SM circuits
Cascaded structure between 2 and other multiple SM circuits 2 remains to work normally.At this point, only need other described multiple SM circuits 2 appropriate
The rectifying operation of ground adjustment H bridge rectification circuits 21, still can export constant high straightening by other described multiple SM circuits 2
Galvanic electricity stream.In other words, by setting diode 23 in each SM circuits 2, the high tension direct current generator can be made to have redundancy
Fan-out capability.
With continued reference to Fig. 2, SM circuits 2 may also include driving circuit 24.Driving circuit 24 can receive generator output control
The control signal that device 3 generates, and each electronic power switch element in the control signal driving H bridge rectification circuits 21
It connects and/or disconnects, to carry out rectification to the alternating current received from corresponding single-phase winding.As described above, generator exports
Controller 3 can be generated according to the angle information and amplitude information of the alternating current of specific single-phase winding to be suitable for and the specific list
The control signal of the corresponding SM circuits 2 of phase winding.For example, control signal may include indicating each electricity in H bridge rectification circuits 21
The information of time that power electronic switching element is connected and/or disconnected.Driving circuit 24 can be whole according to the control signal control H bridges
It is the sequential of connection and/or the disconnection of each electronic power switch element in current circuit 21 and duration, whole so as to adjust H bridges
The level for the DC current that current circuit 21 generates.
With continued reference to Fig. 2, driving circuit 24 includes interface unit 241, control unit 242, driving unit 243, voltage/electricity
Flow sampling unit 244 and power supply unit 255.It is controlled in particular, interface unit 241 can be received from generator o controller 3
Signal.Control unit 242 can generate each in driving H bridge rectification circuits 21 according to the control signal that interface unit 241 receives
Electronic power switch element switches and/or the drive signal of disconnection.The driving that driving unit 243 can generate control unit 242
Signal is applied to each electronic power switch element in H bridge rectification circuits 21, to drive each electronic power switch member
Part is connected and/or is disconnected.Voltage/current sampling unit 244 can sample the voltage/current of H bridge rectification circuits 21, and will
Sampled result feeds back to control unit 242, to adjust drive signal.In other words, it is sampled by voltage/current, it can be achieved that H bridges
The feedback control of each electronic power switch element in rectification circuit 21.In addition, power supply unit 255 is used for as driving circuit 24
Power supply.That is, power supply unit 255 can be interface unit 241, control unit 242, driving unit 243 and voltage/current sampling
Unit 244 is powered.
According to embodiments of the present invention, due to generator and power electronic equipment (that is, exchange multi-winding generator 1 with it is multiple
SM circuits 2) Integration Design, therefore the permanent magnet generator of traditional low pressure, transformation, Frequency output can be integrated into fixed electricity
Press the generating set of direct current output.When the generating set is used for wind power generating set, a large amount of power transmission can be saved
Cost (including cable, transformer etc.).Further, since generator and power electronic equipment Integration Design, therefore when the power generation
When unit is used for wind power generating set, wind-force natural cooling may be used, so as to simplify system cooling structure, improve system
Reliability.In addition, the design of generator o controller causes the work of generating set and monitoring to realize integrated design, so as to
Reduce the maintenance cost of generating set.
Fig. 3 is the schematic representation for showing wind power plant according to embodiments of the present invention.
With reference to Fig. 3, wind power plant 30 may include multiple wind-driven generators being made of high tension direct current generator as described above
Group 310.For example, the direct current power of 310 exportable 20KV of wind power generating set, output voltage is not with the rotation speed change of generator
And change, output current can be determined by the input power of generator.In particular, wind power generating set 300 may include as above
The high tension direct current generator.In addition, to may also include the direct current being connect with high tension direct current generator defeated for wind power generating set 300
Power transmission cable, the direct current handling cable are arranged on inside the tower of high tension direct current generator, and use high voltage direct current two-wire system work(
Rate transmission mode.In addition, the control system of wind power generating set 310 is (for example, the generator output control of high tension direct current generator
Device) electricity or the auxiliary provided by wind power generating set 310 can be directly provided from the high-voltage direct current power grid inside wind power plant 30
Power winding takes electricity.In addition, also low-voltage power can be obtained by the field of wind power plant 30 grade transformer, then by specially setting
The control system of auxiliary power electric power network direction wind-driven generator group 310 is (for example, the generator output control of high tension direct current generator
Device processed) auxiliary power is provided.The control system of wind power generating set 310 is (for example, the generator output control of high tension direct current generator
Device processed) mode that obtains electric power is not present invention focus of interest, it omits the detailed description here.
According to an embodiment of the invention, wind power plant 30 uses flexible high pressure direct current transmission mode, substitutes traditional exchange wind
Power transmission mode in electric field.For this purpose, the wind power plant further includes concentration online inverter 320.Concentrate online inverter 320
The high-voltage direct current that multiple wind power generating sets 310 export can be received, and the high-voltage direct current is converted into high pressure and is handed over
Galvanic electricity stream.Here, it can be the concentration electric power based on MMC (modularization multi-level converter) technology to concentrate online inverter 320
Electronics converting means.By using flexible high pressure direct current transmission mode, when from wind power plant 30 in terms of public electric wire net, wind power plant 30 can
To be equivalent to a Generator Set being made of power electronic equipment.
With continued reference to Fig. 3, wind power plant 30 may also include public network transformer 330 and wind power plant control device 340.Public network transformation
Device 330 is used for the high-voltage ac current access public electric wire net that online inverter 320 will be concentrated to export, wind power plant control device 340
For stablizing the high-voltage direct current that multiple wind power generating sets 310 export, and power is carried out to multiple wind power generating sets 310
Scheduling controlling.According to embodiments of the present invention, various control algolithms can be used to multiple wind-driven generators in wind power plant control device 340
Group 310 is controlled, and which is not described herein again.
By building wind power plant according to embodiments of the present invention as described above, due to the wind power generating set in wind power plant
It is made of high tension direct current generator, therefore the cost transmitted in wind-power generating unit tower can be reduced.Power transmission in pylon
Using cable, and the biggest factor for influencing cable cost is the electric current of cable transmission, and the bigger cable cost of electric current and weight are higher,
After promoting wind power generating set output voltage, the current reduction of equal-wattage apparatus for lower wind generating set output, so as to reduce wind
The cost transmitted in power generator group pylon.Further, since the wind power generating set in wind power plant is by high tension direct current generator structure
Into, therefore wind power generating set inertia can be imported system dc link, and wind-force can be avoided to send out by the way of inversion is concentrated
Electric unit set inertia is directly accessed public electric wire net, so as to improve the stability of wind power plant.Further, since the wind-power electricity generation in wind power plant
Unit is made of high tension direct current generator, and using direct current transmission in wind power plant, therefore cable parasitic capacitance caused by seawater is to straight
DC capacitor will be increased for stream, this brings active influence for bucking-out system inertia.Further, since the wind-force in wind power plant
Generating set is made of high tension direct current generator, therefore two-wire system transmission can be used in wind power plant.This exchanges biography with three-wire system
Defeated (3 cables, two kinds of potential differences) are compared, due to few with 1 cable and only a kind of potential difference, so that the transmission of cable
Corridor relatively easily carries out the relatively low design of floor space, so as to reduce the earth usable floor area of power transmission, brings more
Good economy and social benefit.
Although some embodiments have been shown and described, it will be appreciated by those skilled in the art that not departing from this
In the case of the principle of invention and spirit, can modify to these embodiments, the scope of the present invention by claim and its
Equivalent limits.
Claims (10)
1. a kind of high tension direct current generator, which is characterized in that the high tension direct current generator includes：
Multi-winding generator is exchanged, including N number of three-phase windings, wherein, N is the integer more than 1；
3N single-phase winding control circuits, for the alternating current of each single-phase winding output to the exchange multi-winding generator
Stream carries out rectification, wherein, each single-phase winding control circuit includes：
For receiving the ac input end of alternating current from corresponding one single-phase winding of the exchange multi-winding generator, with
And
The DC output end of DC current that alternating current for exporting to reception carries out rectification and generates, wherein, Ge Gedan
The DC output end of phase winding control circuit is sequentially connected in series, so as to form high voltage direct current output terminal, the high voltage direct current output terminal
The high-voltage direct current for exporting the DC potential of the DC output end by being superimposed each single-phase winding control circuit to obtain；
Generator o controller, for each single-phase winding control circuit to be controlled to carry out rectifying operation.
2. high tension direct current generator as described in claim 1, which is characterized in that the exchange multi-winding generator further includes survey
Fast winding, it is described to test the speed winding for measuring the angle information of the alternating current of each single-phase winding；
The generator o controller is connect with the winding that tests the speed, for each single-phase winding obtained according to measurement
Alternating current angle information, each single-phase winding control circuit of control carries out rectifying operation.
3. high tension direct current generator as claimed in claim 2, which is characterized in that the generator o controller is used for from hair
Outside motor control system receives generator torque information or calculates hair based on the generator torque computational algorithm being pre-designed
Motor torque information calculates the amplitude information of the alternating current of each single-phase winding using the torque information, and according to each
The angle information and amplitude information of the alternating current of a single-phase winding generate control signal and according to the control signal controls
Each single-phase winding control circuit carries out rectifying operation.
4. high tension direct current generator as claimed in claim 3, which is characterized in that each single-phase winding control circuit includes：
H bridge rectification circuits are received by the ac input end from corresponding one single-phase winding of exchange multi-winding generator
Alternating current carries out rectification to generate DC current to the alternating current of reception, and passes through the DC output end output and generate
DC current；
Capacitor is connected in parallel in the DC output end and the H bridge rectification circuits；
Diode is connected in parallel in the DC output end and the H bridge rectification circuits.
5. high tension direct current generator as claimed in claim 4, which is characterized in that each single-phase winding control circuit further includes：
Driving circuit for receiving the control signal that the generator o controller generates, and drives according to the control signal
Each electronic power switch element switches in the H bridge rectification circuits and/or disconnection are moved, it is whole to be carried out to the alternating current
Stream.
6. high tension direct current generator as claimed in claim 5, which is characterized in that the driving circuit includes：
Interface unit, for receiving the control signal from the generator o controller；
Control unit, for generating each electronic power switch driven in the H bridge rectification circuits according to the control signal
Element switches and/or the drive signal of disconnection；
Driving unit, for the drive signal to be applied to each electronic power switch element in the H bridge rectification circuits,
To drive each electronic power switch element switches and/or disconnection；
Voltage/current sampling unit samples, and sampled result is anti-for the voltage/current to the H bridge rectification circuits
Described control unit is fed to, to adjust the drive signal；
Power supply unit, for for the drive circuitry.
7. a kind of wind power generating set, which is characterized in that the wind power generating set is included such as any one of claim 1-6 institutes
The high tension direct current generator stated.
8. wind power generating set as claimed in claim 7, which is characterized in that the wind power generating set further includes and the height
The direct current handling cable of dc generator connection is pressed, the direct current handling cable is arranged on the tower of the high tension direct current generator
Inside, and use high voltage direct current two-wire system power transmission mode.
9. a kind of wind power plant, which is characterized in that the wind power plant includes：
At least one wind power generating set as claimed in claim 7 or 8；And
Online inverter is concentrated, for receiving the high-voltage direct current of wind power generating set output, and by the high straightening
Galvanic electricity circulation is changed to high-voltage ac current to access public electric wire net.
10. wind power plant as claimed in claim 9, which is characterized in that the wind power plant further includes：
Public network transformer connects the concentration online inverter and the public electric wire net；Or/also,
Wind power plant control device, for stablizing the high-voltage direct current of the wind power generating set output, and to the multiple wind
Power generator group carries out power dispatching control.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398680.0A CN108199594A (en) | 2017-05-31 | 2017-05-31 | High-voltage direct-current generator, wind generating set and wind farm |
| PCT/CN2017/115420 WO2018218924A1 (en) | 2017-05-31 | 2017-12-11 | High-voltage direct current generator, wind turbine set, and wind farm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398680.0A CN108199594A (en) | 2017-05-31 | 2017-05-31 | High-voltage direct-current generator, wind generating set and wind farm |
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| CN108199594A true CN108199594A (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710398680.0A Pending CN108199594A (en) | 2017-05-31 | 2017-05-31 | High-voltage direct-current generator, wind generating set and wind farm |
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| Country | Link |
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| WO (1) | WO2018218924A1 (en) |
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| CN113708360A (en) * | 2020-05-22 | 2021-11-26 | 新疆金风科技股份有限公司 | Direct-current wind generating set and permanent magnet semi-direct-drive direct-current power generation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570491A (en) * | 2010-12-22 | 2012-07-11 | 歌美飒创新技术公司 | Multilevel power converter or inverter arrangement using h bridges |
| CN203352190U (en) * | 2013-05-17 | 2013-12-18 | 内蒙古久和能源科技有限公司 | Direct current power transmission system of wind generating set |
| EP3109992A1 (en) * | 2015-06-26 | 2016-12-28 | Hitachi, Ltd. | Power conversion apparatus and wind turbine generation system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2483891Y (en) * | 2001-03-16 | 2002-03-27 | 王自 | Permanent-magnet generator used for vehicles |
| CN101110559B (en) * | 2006-07-20 | 2011-10-12 | 比亚迪股份有限公司 | Magneto synchronous generator controlling system used for hybrid vehicle |
| CN101447678A (en) * | 2008-12-30 | 2009-06-03 | 上海科达机电控制有限公司 | Method for accessing multi-winding wind power generator into power network |
| CN102611136A (en) * | 2012-03-15 | 2012-07-25 | 广东明阳龙源电力电子有限公司 | Wind power generation equipment |
| CN103944320A (en) * | 2014-04-25 | 2014-07-23 | 西北工业大学 | Rectifying circuit for permanent magnet synchronous generator |
| CN106026171A (en) * | 2016-06-29 | 2016-10-12 | 中国西电电气股份有限公司 | Wind-power direct-current collection power transmission system |
-
2017
- 2017-05-31 CN CN201710398680.0A patent/CN108199594A/en active Pending
- 2017-12-11 WO PCT/CN2017/115420 patent/WO2018218924A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570491A (en) * | 2010-12-22 | 2012-07-11 | 歌美飒创新技术公司 | Multilevel power converter or inverter arrangement using h bridges |
| CN203352190U (en) * | 2013-05-17 | 2013-12-18 | 内蒙古久和能源科技有限公司 | Direct current power transmission system of wind generating set |
| EP3109992A1 (en) * | 2015-06-26 | 2016-12-28 | Hitachi, Ltd. | Power conversion apparatus and wind turbine generation system |
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| WO2018218924A1 (en) | 2018-12-06 |
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Application publication date: 20180622 |