CN107947242A - Power generation and transmission system of wind generating set and wind generating set - Google Patents
Power generation and transmission system of wind generating set and wind generating set Download PDFInfo
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- CN107947242A CN107947242A CN201711404721.9A CN201711404721A CN107947242A CN 107947242 A CN107947242 A CN 107947242A CN 201711404721 A CN201711404721 A CN 201711404721A CN 107947242 A CN107947242 A CN 107947242A
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- 238000010248 power generation Methods 0.000 title abstract description 6
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- 230000005611 electricity Effects 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000011161 development Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
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- 241001014327 Anodontia Species 0.000 description 1
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Classifications
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- H02J3/386—
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
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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 embodiment of the invention provides a power generation and transmission system of a wind generating set and the wind generating set, the power generation and transmission system comprises: the wind power generation system comprises a generator system (31) arranged between a cabin (11) and a wind wheel (12), a converter system (32) arranged in a tower (14), and a cable group (33) arranged in the cabin (11) and the tower (14); the generator system (31) comprises a generator (13) and an alternating current-direct current conversion module (311); the input end and the output end of the alternating current-direct current conversion module (311) are respectively and electrically connected with the output end of the generator (13) and the cable group (33) and are used for converting alternating current output by the generator (13) into direct current and transmitting the direct current to the converter system (32) through the cable group (33); the converter system (32) is used to convert the received direct current into alternating current. Because the cable set transmits direct current, the number of used cables is reduced compared with the number of used cables for transmitting alternating current.
Description
Technical field
The present invention relates to the power generation-transmission system and wind of technical field of wind power generation, more particularly to a kind of wind power generating set
Power generator group.
Background technology
With the continuous development of wind power industry, outstanding wind-resources are carved up totally, the development in Di Feng areas into
For the trend of future development, for permanent magnet transmission technology by fast development, permanent magnet transmission technology is to utilize magnetic drive loaded work piece, real
Non-contacting torsion transmission between motor and load is showed.Motor-driven power rotor rotates at a high speed, is produced in driven rotor
Magnetic field in cutting magnetic line, so as to produce induced field, pass through the Interaction Force in magnetic field, driving load work, is realized
The transmission of torsion.
With the development of permanent magnet transmission technology, full power convertor will be more and more common, meanwhile, high-power wind turbine equipment
Also will be the trend of Wind Power Development.Wind power generating set is to convert wind energy into mechanical energy, and mechanical energy drives generator amature rotation
Turn, the power equipment of final output alternating current.
At present, whole power transmission sends alternating current by generator, the unsteady flow by transmission cable access positioned at bottom of towe
In device, through processes such as over commutation, inversion, filtering in current transformer, the alternating current that generator is sent is converted into meeting grid-connected bar
The electric energy of part, in the process, inventors herein have recognized that problems with exists in the prior art：
Firstth, the transmission cable quantity that the prior art uses is more, and loss is big, and system effectiveness is low.
Secondth, current transformer space accounting is big, and equipment is concentrated, O＆M narrow space.
The content of the invention
In view of this, the purpose of the present invention aims to provide the power generation-transmission system and wind-power electricity generation of a kind of wind power generating set
Unit, it is more to solve prior art transmission cable quantity, and current transformer space accounting is big the problem of.
To achieve these goals, the present invention provides following technical scheme：
A kind of power generation-transmission system of wind power generating set, including：It is arranged at the cabin and wind of the wind power generating set
Generator system between wheel, the converter system being arranged in the tower of the wind power generating set and it is arranged at the cabin
With the cable group in the tower；
The generator system includes generator and AC-DC conversion module；
The input, output end of the AC-DC conversion module output terminal with the generator, the cable group respectively
It is electrically connected, the alternating current for the generator to be exported is converted to direct current, and is transmitted to the change by the cable group
Streaming system；
The converter system is used to the direct current of reception being converted to alternating current.
Preferably, the AC-DC conversion module includes rectifier, and the converter system includes DC chopped-wave boost module
And inverter；
The input terminal of the rectifier is electrically connected with the output terminal of the generator, and output terminal is electrically connected with the cable group
Connect；
The input terminal of the DC chopped-wave boost module is electrically connected with the cable group, and output terminal is defeated with the inverter
Enter end to be electrically connected.
Preferably, the AC-DC conversion module includes rectifier and DC chopped-wave boost module；
The input terminal of the rectifier is electrically connected with the output terminal of the generator, and output terminal boosts with the DC chopped-wave
The input terminal of module is electrically connected；
The output terminal of the DC chopped-wave boost module is electrically connected with the cable group.
Preferably, the generator system further includes cooling system, and the cooling system is used to pass through air passage or water channel
The AC-DC conversion module is cooled down.
Preferably, the generator is permanent magnet direct-drive generator.
Preferably, the permanent magnet direct-drive generator includes at least a set of winding, and every suit winding corresponding one is described to be handed over directly
Flow modular converter.
Preferably, every suit winding output three-phase alternating current, often intersects galvanic electricity by three generator leads with being somebody's turn to do
The three-phase input end one-to-one corresponding for covering the corresponding AC-DC conversion module of winding is electrically connected, and the two of the AC-DC conversion module
Output terminal is corresponded with two cables in the cable group and is electrically connected.
Preferably, the AC-DC conversion module is encapsulated in cabinet body structure or body structure.
Preferably, the converter system further includes wave filter, the output of the input terminal of the wave filter and the inverter
End is electrically connected；
The power generation-transmission system of wind power generating set further includes transformer, the input terminal of the transformer and the unsteady flow system
The output terminal of system is electrically connected, and output terminal is connected to power grid.
A kind of wind power generating set, includes the power generation-transmission system of above-mentioned wind power generating set.
Compared with the prior art, the solution of the present invention has the advantages that：
The power generation-transmission system of wind power generating set provided in an embodiment of the present invention, since the power generation-transmission system includes setting
The generator system that is placed between the cabin of wind power generating set and wind wheel (impeller), be arranged in the tower of wind power generating set
Converter system and the cable group that is arranged in cabin and tower；Generator system includes generator and AC-DC conversion module；
AC-DC conversion module is used to the alternating current of generator output being converted to direct current, and is transmitted to unsteady flow system by cable group
System；Converter system is used to the direct current of reception being converted to alternating current.Compared with prior art, will be handed in the embodiment of the present invention straight
Stream modular converter integrated with generator, cable group transmit be by the transformed direct current of AC-DC conversion module,
And the alternating current that not prior art is transmitted, if the electric energy that generator is sent is three-phase alternating current, the prior art needs to use three
Group transmission cable carries out the transmission of electric energy, and what the embodiment of the present invention was transmitted due to cable group is direct current, in cable group
Two groups of cables are only needed to carry out the transmission of electric energy, cable usage amount can reduce by 33%；And then the electric energy loss of system can be reduced,
Lifting system efficiency；In addition, converter system in the embodiment of the present invention is due to being no longer converted to direct current into being about to alternating current
Rectification function, compared with prior art, has peeled off the partial function of prior art current transformer, therefore the present invention to a certain extent
The space of converter system in embodiment account for it is smaller, so as to improve O＆M space and operability.
Also, the embodiment of the present invention includes rectifier and DC chopped-wave with the miniaturization of device, AC-DC conversion module
Boost module；In this way, being not only integrated with rectifier in the generator system of the specific embodiment of the invention, further it is also integrated with straight
Copped wave boost module is flowed, can further peel off the partial function of current transformer in the prior art, compared with prior art, unsteady flow system
The space accounting of system can further reduce, so as to further lift O＆M space and operability.
Further, since generator system provided in an embodiment of the present invention further includes cooling system, cooling system is used to pass through
Air passage or water channel cool down AC-DC conversion module；In this way, since cooling system is integrated in generator system, can
Quickly the heat produced in AC-DC conversion module routine is cooled down, so as to improve making for AC-DC conversion module
Use the service life.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the electric energy transmission system structure diagram of prior art wind power generating set；
Fig. 2 is the part schematic diagram of the electric energy transmission system of prior art wind power generating set；
Fig. 3 is a kind of power generation-transmission system structure diagram of wind power generating set provided in an embodiment of the present invention；
Fig. 4 is a kind of part signal of the power generation-transmission system of wind power generating set provided in an embodiment of the present invention
Figure；
Fig. 5 is that a kind of concrete composition part of the power generation-transmission system of wind power generating set provided in an embodiment of the present invention shows
It is intended to；
Fig. 6 is that another concrete composition part of the power generation-transmission system of wind power generating set provided in an embodiment of the present invention shows
It is intended to；
Fig. 7 is that the another concrete composition part of the power generation-transmission system of wind power generating set provided in an embodiment of the present invention shows
It is intended to；
Fig. 8 is generator system structure diagram provided in an embodiment of the present invention.
Illustrate the implication that each reference numeral of the embodiment of the present invention represents below：
11- cabins；12- wind wheels；13- generators；14- towers；15- current transformers；16- transmission cables；17- power grids；151-
Rectifier；152- DC chopped-wave boost modules；153- inverters；154- wave filters；21- transformers.
31- generator systems；32- converter systems；33- cable groups；311- AC-DC conversion modules；81- cooling systems；
91- permanent magnet direct-drive generators；92- inner leads；Cable in 93- cable groups.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that what is used in the specification of the present invention arranges
Diction " comprising " refer to there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
One or more other features, integer, step, operation, element, component and/or their groups.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or wireless coupling.It is used herein to arrange
Taking leave "and/or" includes whole or any cell and all combinations of one or more associated list items.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology), there is the meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have with the context of the prior art
The consistent meaning of meaning, and unless by specific definitions as here, idealization or the implication of overly formal otherwise will not be used
To explain.
The present inventor is studied existing, finds following problem.
As shown in Figure 1, Fig. 1 is the electric energy transmission system structure diagram of prior art wind power generating set, including：Set
Generator 13 between the cabin 11 of wind power generating set and wind wheel 12, the change being arranged in the tower 14 of wind power generating set
Flow device 15, and the transmission cable 16 being arranged in cabin 11 and tower 14.Wherein, the friendship that current transformer 15 sends generator 13
Galvanic electricity, which is converted into meeting after the electric energy of grid-connected conditions, is connected to the grid 17.
As shown in Figure 1, the electric energy that sends of prior art generator 13 for three-phase alternating current, it is necessary to three groups of transmission cables 16 into
The transmission of row electric energy, what each group of transmission cable 16 transmitted is alternating current.
As shown in Fig. 2, Fig. 2 is the schematic diagram of the part of the electric energy transmission system of prior art wind power generating set,
The course of work of the electric energy transmission system includes：Generator 13 sends alternating current, and alternating current is located at by the access of transmission cable 16
In the current transformer 15 of bottom of towe, electric energy that the alternating current that generator 13 is sent is converted into meeting grid-connected conditions by current transformer 15, then
It is connected to the grid 17, or the electricity consumption for internal unit by transformer 21.
As shown in Fig. 2, current transformer 15 of the prior art includes rectifier 151, DC chopped-wave boost module 152, inversion
Device 153 and wave filter 154.
In the course of the research, inventor has found, the electric energy that prior art generator 13 produces is in generator 13 to current transformer
Form of communication is used in 15 transmitting procedure so that 16 quantity of transmission cable is more, and loss is big, and system effectiveness is low.
In addition, the current transformer 15 of the prior art is included due to the function of realization：The multiple functions such as rectification, inversion, filtering, make
It is big to obtain 15 space accounting of current transformer, equipment is concentrated, O＆M narrow space.
The technical solution of the embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
A kind of the present inventor, in view of the shortcomings of the prior art, there is provided the power generation transmission of electricity of wind power generating set
System.
As shown in figure 3, Fig. 3 is a kind of power generation-transmission system knot for wind power generating set that the specific embodiment of the invention provides
Structure schematic diagram, including：It is arranged at the generator system 31 between the cabin 11 of wind power generating set and wind wheel 12, is arranged at wind-force
Converter system 32 in the tower 14 of generating set and the cable group 33 being arranged in cabin 11 and tower 14；In addition, in Fig. 3
Cable group 33 be also provided with cable Niu Lan mechanisms in actual design, the cable group 33 in Fig. 3 is only the signal omitted
Figure.
As shown in figure 4, Fig. 4 is a kind of composition of the power generation-transmission system of wind power generating set provided in an embodiment of the present invention
Partial schematic diagram, the generator system 31 in the specific embodiment of the invention include generator 13 and AC-DC conversion module 311；Hand over
The input terminal of DC conversion modules 311 is electrically connected with the output terminal of generator 13, output terminal and the electricity of AC-DC conversion module 311
Cable group 33 is electrically connected, and the alternating current for generator 13 to be exported is converted to direct current, and is transmitted to unsteady flow by cable group 33
System 32；Converter system 32 is used to the direct current of reception being converted to alternating current.
As it can be seen that compared with prior art, AC-DC conversion module 311 and generator 13 are collected in the specific embodiment of the invention
Into together, what cable group 33 was transmitted is by 311 transformed direct current of AC-DC conversion module, and not the prior art passes
Defeated alternating current, if the electric energy that generator 13 is sent is three-phase alternating current, what it is due to the transmission of prior art transmission cable is exchange
Electricity, therefore the prior art needs to carry out the transmission of electric energy using three groups of transmission cables, and the specific embodiment of the invention is due to cable
The transmission of group 33 is direct current, therefore the transmission of two groups of cables progress electric energy is only needed in cable group 33, and cable usage amount can drop
Low 33%, cable use cost can be reduced；And then the electric energy loss of system can be reduced, lifting system efficiency；In addition, with it is existing
The current transformer 15 of technology is compared, and the converter system 32 in the specific embodiment of the invention reduces partial function, such as by alternating current
The rectification function of direct current is converted to, no longer needs these to cut down the corresponding hardware of function naturally, simplifies structure, reduce body
Product, thus the space of the converter system 32 in the specific embodiment of the invention account for it is smaller so that it is empty to improve O＆M in tower
Between and operability.
Preferably, as shown in figure 5, Fig. 5 is the power generation-transmission system of wind power generating set provided in an embodiment of the present invention
A kind of concrete composition partial schematic diagram, the AC-DC conversion module 311 in the specific embodiment of the invention include rectifier 151, become
Streaming system 32 includes DC chopped-wave boost module 152 and inverter 153；The input terminal of rectifier 151 and the output of generator 13
End is electrically connected, and output terminal is electrically connected with cable group 33；The input terminal of DC chopped-wave boost module 152 is electrically connected with cable group 33,
Output terminal is electrically connected with the input terminal of inverter 153.
Rectifier 151 is the device for alternating current being converted into direct current in the specific embodiment of the invention；DC chopped-wave boosts
The function of module 152 is that direct current is changed into another fixed or adjustable direct current, also referred to as DC-DC converter；
Inverter 153 is the device converting direct-current power into alternating-current power；Rectifier 151, DC chopped-wave boost module 152 and inverter
Similarly to the prior art, which is not described herein again for 153 concrete operating principle.
Further, with the miniaturization of device, as shown in fig. 6, Fig. 6 is wind-driven generator provided in an embodiment of the present invention
Another concrete composition partial schematic diagram of the power generation-transmission system of group, AC-DC conversion module 311 in the specific embodiment of the invention
Including rectifier 151 and DC chopped-wave boost module 152；The input terminal of rectifier 151 is electrically connected with the output terminal of generator 13,
Output terminal is electrically connected with the input terminal of DC chopped-wave boost module 152；The output terminal of DC chopped-wave boost module 152 and cable group
33 are electrically connected.In this way, being not only integrated with rectifier 151 in the generator system 31 of the specific embodiment of the invention, further also collect
Into there is DC chopped-wave boost module 152, the partial function of current transformer 15 in the prior art can be further peeled off, can be further
Reduce the space accounting of converter system 32, further lift O＆M space and operability.
The generator system of rectifier is integrated in the specific embodiment of the invention, with the development of Semiconductor Converting Technology, rectifier is also
The rectification module that can be taken other form substitutes, and is as long as rectification module can realize the AC conversion for sending generator
The function of direct current.
It is preferred that as shown in fig. 6, the converter system 32 in the specific embodiment of the invention further includes wave filter 154, wave filter
154 input terminal is electrically connected with the output terminal of inverter 153；The filtered electrical that wave filter 154 is made of capacitance, inductance and resistance
Road, wave filter 154 can effectively filter out the frequency beyond the frequency point of specific frequency or the frequency point, obtain a specific frequency
The electric signal of rate, or the electric signal after a specific frequency is eliminated, in this way, specific embodiment of the invention median filter 154 is set
The electric signal for enabling to converter system 32 to export is put more to stablize.
As shown in Figure 5 and Figure 6, the power generation-transmission system that the specific embodiment of the invention provides includes transformer 21, transformer
21 input terminal is electrically connected with the output terminal of converter system 32, and output terminal is connected to power grid 17；Transformer 21 is to utilize electromagnetism sense
The principle answered changes the device of alternating voltage, and main member includes primary coil, secondary coil and iron core；Major function has：
Voltage transformation, current transformation, impedance conversion, isolation, voltage stabilizing etc.；The concrete operating principle of transformer 21 similarly to the prior art,
Which is not described herein again.Certainly, the alternating current that converter system 32 exports in the specific embodiment of the invention can also be without transformer
21 boosting, and be directly electrically connected with other internal units, power for the internal unit of electrical connection.
In order to preferably be cooled down to AC-DC conversion module, it is preferred that as shown in fig. 7, Fig. 7 is the embodiment of the present invention
The another concrete composition partial schematic diagram of the power generation-transmission system of the wind power generating set of offer, in the specific embodiment of the invention
Generator system 31 further includes cooling system 81, and cooling system 81 is used for by air passage or water channel to AC-DC conversion module
311 are cooled down；In this way, since cooling system 81 is integrated in generator system 31, can be quickly to AC-DC conversion mould
The heat produced in 311 course of work of block is cooled down, so as to improve the service life of AC-DC conversion module 311.
Specifically, the AC-DC conversion module 311 in the specific embodiment of the invention is encapsulated in cabinet body structure or babinet knot
In structure；In actual design, AC-DC conversion module 311 is preferably encapsulated in body structure by the specific embodiment of the invention, this
Sample AC-DC conversion module 311 take up space it is smaller, certainly, space allow in the case of, the specific embodiment of the invention also may be used
AC-DC conversion module 311 is encapsulated in cabinet body structure.
It is preferred that the generator in the specific embodiment of the invention is permanent magnet direct-drive generator, direct drive generator, is a kind of
By wind-force direct drive generator, also known as anodontia turbine generator, this generator using multipolar dynamo and impeller be directly connected into
The mode of row driving, removes gear-box this legacy device from, since gear-box is to belong to easy in MW class wind turbine at present
Overload and the higher component of premature breakdown rate, therefore, without the direct drive generator of gear-box, possess low wind speeds high efficiency,
Low noise, high life, reduce unit volume, reduce the advantages that operation expense.
It is preferred that permanent magnet direct-drive generator includes at least a set of winding in the specific embodiment of the invention, every suit winding is equal
A corresponding AC-DC conversion module 311；As shown in figure 8, Fig. 8 is generator system structural representation provided in an embodiment of the present invention
Scheme, every suit winding output three-phase alternating current that permanent magnet direct-drive generator 91 includes in the specific embodiment of the invention, per cross streams
Electricity is a pair of by the three-phase input end one of three generator leads 92 AC-DC conversion module 311 corresponding with the set winding
It should be electrically connected, two output terminals of the AC-DC conversion module 311 are corresponded with two cables 93 in cable group 33 and are electrically connected,
A wherein cable 3 is used for transmission positive direct current, and another cable 93 is used for transmission negative direct current.Inner lead in Fig. 8
92 and cable 93 shown in quantity be merely exemplary, the actual number of the inner lead 92 and cable 93 in the embodiment of the present invention
Amount is from this limitation.
For the specific embodiment of the invention by taking permanent magnet direct-drive generator includes double winding as an example, every suit winding is independent three
Intersecting galvanic electricity, often intersects galvanic electricity by three cable transmissions, therefore it is nine electricity often to cover before winding introduces AC-DC conversion module 311
Cable, then only needs six roots of sensation cable after AC-DC conversion module 311, the AC-DC conversion in the specific embodiment of the invention
The phase of module 311 is six phases；Correspondingly, for two sets of independent windings, six integrated in permanent magnet direct-drive generator are intersecting straight
It is also two groups to flow modular converter 311.
In addition, the phase of AC-DC conversion module 311 in the specific embodiment of the invention can also be three-phase, nine it is equal with
Three be the phase of multiple；Specifically, normal communication electricity is three-phase alternating current, if generator uses double winding, alternating current-direct current turns
The phase for changing the mold block 311 be six phases, and with the increase of generator power, and generator may using three sets, four sets or more
More set three-phase windings, then the phase of AC-DC conversion module 311 be nine phases, 12 it is equal with three for multiple phase.
The whole work process of the power generation-transmission system of wind power generating set includes in the specific embodiment of the invention：First,
Since the generator system in the specific embodiment of the invention integrates generator and AC-DC conversion module, generator hair
The alternating current gone out exports after AC-DC conversion module rectification and gives cable group；Then cable group is transmitted in the form of direct current, will
Direct current is by being transmitted to the converter system of bottom of towe in cabin；Then, generator system is sent and is formed after rectification by converter system
Direct current by the link such as inversion, filtering, convert electric energy to the alternating current for meeting grid requirements；Finally, transformer is passed through
It is connected to the grid after boosting.
Based on same inventive concept, the specific embodiment of the invention additionally provides a kind of wind power generating set, including the present invention
The power generation-transmission system for the above-mentioned wind power generating set that specific embodiment provides.The wind power generating set possesses above-mentioned wind-power electricity generation
The attainable whole beneficial effects of power generation-transmission system institute of unit.
In conclusion the power generation-transmission system for the wind power generating set that the specific embodiment of the invention provides, have has as follows
Beneficial effect：
Firstth, it is three-phase alternating current, it is necessary to three groups of cables are transmitted electric energy that traditional wind power generating set, which sends electric energy,
And power generation-transmission system provided in an embodiment of the present invention is used, cable transmission is direct current, only needs two when transmitting direct current
Group cable can transmit electric energy, and cable usage amount can reduce by 33%；Meanwhile three-phase alternating current is promoted to original by rectified voltage
1.35 times come, in the case where power is constant, electric current can reduce by 1.35 times.
Secondth, in the case where ensureing current-carrying capacity of cable, 1.35 times due to current reduction, when selecting cable,
The selection specification of cable can be suitably reduced, so as to reduce the dosage of cable material (the material selection copper of such as cable, the use of copper
Amount will be reduced), production cost can be reduced.
3rd, cable is during alternating current is transmitted, due to kelvin effect so that and the resistance of transmission cable is larger, and
Using power generation-transmission system provided in an embodiment of the present invention, cable transmission is direct current, therefore cable in the embodiment of the present invention
Resistance it is smaller.
4th, since the current reduction of the cable group in the embodiment of the present invention, resistance reduce, hence in so that cable group is transmitted
Be lost it is relatively low, so as to improve the generating efficiency of wind power generating set.
5th, due to the converter system that is included using power generation-transmission system provided in an embodiment of the present invention to a certain extent
The partial function of prior art current transformer is peeled off, therefore the space accounting of the converter system in the embodiment of the present invention is relatively
It is small, so as to improve O＆M space and operability.
The above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. power generation-transmission system of wind power generating set, it is characterised in that including：It is arranged at the wind power generating set Generator system (31) between cabin (11) and wind wheel (12), the change being arranged in the tower (14) of the wind power generating set Streaming system (32) and the cable group (33) being arranged in the cabin (11) and the tower (14)；The generator system (31) includes generator (13) and AC-DC conversion module (311)；The input, output end of the AC-DC conversion module (311) output terminal with the generator (13), the electricity respectively Cable group (33) is electrically connected, and the alternating current for the generator (13) to be exported is converted to direct current, and passes through the cable group (13) it is transmitted to the converter system (32)；The converter system (32) is used to the direct current of reception being converted to alternating current.
- 2. power generation-transmission system according to claim 1, it is characterised in that the AC-DC conversion module (311) includes Rectifier (151), the converter system (32) include DC chopped-wave boost module (152) and inverter (153)；The input terminal of the rectifier (151) is electrically connected with the output terminal of the generator (13), output terminal and the cable group (33) it is electrically connected；The input terminal of the DC chopped-wave boost module (152) is electrically connected with the cable group (33), output terminal and the inversion The input terminal of device (153) is electrically connected.
- 3. power generation-transmission system according to claim 1, it is characterised in that the AC-DC conversion module (311) includes Rectifier (151) and DC chopped-wave boost module (152)；The input terminal of the rectifier (151) is electrically connected with the output terminal of the generator (13), and output terminal is cut with the direct current The input terminal of ripple boost module (152) is electrically connected；The output terminal of the DC chopped-wave boost module (152) is electrically connected with the cable group (33).
- 4. the power generation-transmission system according to Claims 2 or 3, it is characterised in that the generator system (31) further includes Cooling system (81), the cooling system (81) be used for by air passage or water channel to the AC-DC conversion module (311) into Row cooling.
- 5. power generation-transmission system according to claim 4, it is characterised in that the generator (13) generates electricity for permanent magnet direct-drive Machine (91).
- 6. power generation-transmission system according to claim 5, it is characterised in that the permanent magnet direct-drive generator (91) is included extremely Few a set of winding, the corresponding AC-DC conversion module (311) of every suit winding.
- 7. power generation-transmission system according to claim 6, it is characterised in that every suit winding exports three-phase alternating current, often Intersecting galvanic electricity passes through the three of three generator leads (92) AC-DC conversion module (311) corresponding with the set winding Phase input terminal, which corresponds, to be electrically connected, two output terminals of the AC-DC conversion module (311) and two in the cable group (33) Root cable (93), which corresponds, to be electrically connected.
- 8. power generation-transmission system according to claim 7, it is characterised in that the AC-DC conversion module (311) is sealed In cabinet body structure or body structure.
- 9. power generation-transmission system according to claim 2, it is characterised in that the converter system (32) further includes wave filter (154), the input terminal of the wave filter (154) is electrically connected with the output terminal of the inverter (153)；Transformer (21) is further included, the input terminal of the transformer (21) is electrically connected with the output terminal of the converter system (32), Output terminal is connected to power grid (17).
- 10. a kind of wind power generating set, it is characterised in that including claim 1-9 any one of them wind power generating sets Power generation-transmission system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404721.9A CN107947242A (en) | 2017-12-22 | 2017-12-22 | Power generation and transmission system of wind generating set and wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404721.9A CN107947242A (en) | 2017-12-22 | 2017-12-22 | Power generation and transmission system of wind generating set and wind generating set |
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| CN107947242A true CN107947242A (en) | 2018-04-20 |
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| CN201711404721.9A Pending CN107947242A (en) | 2017-12-22 | 2017-12-22 | Power generation and transmission system of wind generating set and wind generating set |
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Cited By (1)
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|---|---|---|---|---|
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