CN107359643A - A kind of stator permanent-magnet dual-rotor wind power generation system - Google Patents
A kind of stator permanent-magnet dual-rotor wind power generation system Download PDFInfo
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- CN107359643A CN107359643A CN201710688901.8A CN201710688901A CN107359643A CN 107359643 A CN107359643 A CN 107359643A CN 201710688901 A CN201710688901 A CN 201710688901A CN 107359643 A CN107359643 A CN 107359643A
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- 238000010248 power generation Methods 0.000 title claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 38
- 230000005611 electricity Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 5
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000011105 stabilization Methods 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H02J3/386—
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention is a kind of stator permanent-magnet dual-rotor wind power generation system, including directly driven wind-powered system, directly driven wind-powered system one end connection wind energy conversion system, the other end is connected with diode uncontrollable rectifier and DC DC converters, the DC DC converters other end connects inverter, the connection load of the inverter other end；The invention provides a kind of stator permanent-magnet dual-rotor wind power generation system, it is a kind of intelligent, modularization, the device of mechanization, inverter uses Z-source inverter, by controlling straight-through dutycycle to be easily achieved the boost function similar with two-stage type power adjusting circuit, so as to reduce the power grade of input voltage grade and inverter, directly driven wind-powered system uses stator permanent-magnet double-rotor machine, with power density height, center roller is simple in construction and the advantages of high mechanical strength, DC DC converters maintain the stabilization of wind power system DC bus-bar voltage using control super capacitor charge-discharge electric power, realize voltage stabilization of the wind power system in big signal disturbance.
Description
Technical field
The present invention relates to wind power generation field, more particularly to a kind of stator permanent-magnet dual-rotor wind power generation system.
Background technology
Wind-power electricity generation is the extensive effective way for utilizing clean energy resource, because it is mitigating environmental pollution, is improving the energy
Structure, the outstanding role for solving the problems, such as residential electricity consumption from far-off regions etc., are increasingly paid attention to by countries in the world.In recent years
Come, wind generating technology achieves significant progress and development, and extensive, Large Copacity wind power plant is thrown in succession all over the world
Production.But because the power output of Wind turbines is mainly influenceed by many-sides such as wind speed, air pressure, temperature, therefore often fluctuate.
When wind power integration capacity reaches certain proportion, the stable operation to power system is brought one by the random fluctuation of its power output
A little negative effects, such as frequency is unstable, voltage flicker and falls, harmonic pollution, particularly when system reserve capacity deficiency,
Influence more obvious.
Generator is as one of nucleus equipment in wind generator system, the continuous improvement of its performance, to a certain extent
The developing direction of wind generating technology is affected, cage type asynchronous generating is used more in the constant-speed and constant-frequency wind generator system of early stage
Machine, such generator are connected by gear-box with blower fan, and its stator terminal output voltage changes and changed with wind speed, need to be equipped with volume
Larger, expensive total power converter, which could be realized, to be incorporated into the power networks.Therefore, it is continuous with what is required wind generator system
Improve, particularly single-machine capacity increases sharply widely used with variable speed constant frequency technology so that using double feed wound asynchronous generator
Dual feedback wind power generation system and occupied using the permanent magnetism wind power generation system of magneto alternator in wind power generation field
Leading position.Rotor windings are connected by the power inverter of energy capable of bidirectional flowing with power network in dual feedback wind power generation system
Connect, the converter need to only transmit slip power (generally the 1/3 of wind generator system capacity), and converter is held so as to reduce
The demand of amount, double-fed generator stator winding are directly connected with power network, and influencing each other between system and power network is relatively strong, therefore double-fed
In wind generator system the problems such as stable operation under power stability output, low voltage crossing, unbalanced source voltage up for
It is further perfect.In addition, doubly-fed generation system blower is connected by step-up gear with generator, therefore reduce wind energy
Conversion efficiency, while the fault rate of system is added, reduce reliability.In permanent magnetism wind power generation system, generator unit stator leads to
Cross total power converter with power network to be connected, formed and isolated between generator and power network so that influenced each other between the two smaller.Low speed is forever
Magnetic wind force generating system typically uses direct drive structure, improves the efficiency and operational reliability of system.But with single-machine capacity
Increase, low-speed permanent-magnet synchronous generator volume is excessively huge, permanent magnet materials increase, transport with installation difficulty increase, in addition
It is higher using total power converter, system cost.Current half direct drive structure in Large Copacity permanent magnetism wind power generation system apply compared with
To be universal.
In recent years, with the further development of electric motor and controller technology, brushless double feed generator, switch reluctance generator
Deng also entering wind power generation field, turn into the hot issue of academia's research.Brushless double feed generator has two sets of numbers of poles not
Same stator winding, wherein, power winding is directly connected with power network, and controling winding is connected by power inverter with power network.Nothing
Brush dual feedback wind power generation system and doubly-fed generation system except with it is same the advantages of in addition to, rotor is cage structure, is saved
Collector ring and brush, reduce motor cost, improve the operational reliability of system, but brushless double feed wind generator system electricity
Machine body design Theory comparison is complicated, and manufacture is difficult, and technology is relatively not mature enough, at present still in the experimental study stage, does not obtain
Large-scale application is obtained, it is necessary to do further exploration in motor body manufacture and design theory, switch reluctance generator stator is set
There is a concentratred winding, no rotor windings, i.e., no independent Exciting Windings for Transverse Differential Protection, system works in stator winding to encourage by Time-sharing control
Magnetic and generator operation state, therefore the controller design of the system is complex, up for further perfect, it can be seen that
Permanent magnetism wind power generation system is more wide in the significant advantage of Large Copacity wind power generation field, development prospect due to it.
The use of inverter in permanent magnet generator system, switching tube can not be led voltage source inverter bridge arm simultaneously up and down
It is logical, short circuit otherwise can occur, damage inverter, it is therefore necessary to dead time is added between upper and lower bridge arm switching signal, but extremely
The addition of area's time can cause output waveform to distort again.On the other hand, inverter output voltage is less than DC input voitage, low
Pressure or the larger occasion of voltage change need to add booster circuit in prime, and it is complicated that this results in whole system, efficiency
Reduce.Z-source inverter can overcome the above-mentioned deficiency of voltage source inverter, and Z-source inverter utilizes same bridge arm switching tube straight
Lead to realize the boosting to input direct voltage, therefore Z-source inverter is voltage boosting/reducing inverter.Because pass-through state becomes
A kind of mode of operation of inverter, then the pass-through state as caused by electromagnetic interference etc. will not damage inverter, and can keep away
Exempt from output waveform caused by dead time to distort.Meanwhile the topology of traditional Z-source inverter also deposits following defect：(1) Z source networks
Capacitance voltage is higher than input direct voltage, causes electric capacity volume and cost higher；(2) Z-source inverter boost capability is limited；(3)
Converter, which exists, starts impulse circuit, is easily damaged inverter.
The content of the invention
The invention discloses a kind of stator permanent-magnet dual-rotor wind power generation system, is a kind of intellectuality, modularization, machinery
The device of change, inverter use Z-source inverter, by controlling straight-through dutycycle to be easily achieved and two-stage type power adjusting circuit
Similar boost function, so as to reduce the power grade of input voltage grade and inverter, while in maximum power point electricity
When pressing the situation with environment wide fluctuations, inverter output voltage is kept to disclosure satisfy that grid-connected requirement, easy to adjust, straight wind dispelling
Electric system uses stator permanent-magnet double-rotor machine, has that power density is high, center roller is simple in construction and a high mechanical strength
Advantage.
The present invention is achieved in that a kind of stator permanent-magnet dual-rotor wind power generation system, including directly driven wind-powered system,
Directly driven wind-powered system one end connection wind energy conversion system, the other end are connected with diode uncontrollable rectifier and DC-DC converter, DC-DC
The converter other end connects inverter, the connection load of the inverter other end；
The directly driven wind-powered system uses stator permanent-magnet double-rotor machine, and stator permanent-magnet double-rotor machine includes rotation
Axle, rotary shaft is axially external to be provided with internal rotor, the first permanent magnet is provided with internal rotor axial direction, inner rotor shaft is laterally
The first winding is provided with, is provided with center roller on the outside of the first axis of winding, center roller is axially external to be provided with the second winding
And external stator, the second permanent magnet is provided with stator shaft orientation direction, external stator and center roller form outer motor, and internal rotor is with
Between rotor form in motor, internal rotor and external stator can regard the stator of inside and outside motor, the first permanent magnet and the first winding as respectively
It is arranged on the internal rotor of interior motor, the second permanent magnet and the second winding are arranged on the external stator of outer motor, interior dispatch from foreign news agency
Two air gaps of machine are referred to as " interior air gap " and " outer air gap ", and three parts of motor are separated by two air gaps, and in magnetic circuit
Upper connection；
The diode uncontrollable rectifier and DC-DC converter are integrally compound using diode uncontrollable rectifier and step-up/down
Circuit, optimize the electromagnetic design of motor, close to U after its output voltage is rectified under certain intermediate speeddc, when being run compared with low speed
Using booster circuit, reduction voltage circuit is used when higher speed is run, so as to stable DC side voltage；
The inverter uses Z-source inverter, and Z-source inverter possesses 9 kinds of switching vector selectors, and one of which is shoot-through zero vector
State, i.e., the state that same bridge arm lower power tube simultaneously turns on, Z-source inverter realize boosting work(by shoot-through zero vector state
Can, IGBT active switch and inductance LinConnected with forming prime Boost circuit together with diode A, then with Z source networks, improve and rise
Pressure energy power, inductance LinConnected with input power, continuous input current, and startup impulse circuit will not be formed, IGBT is active to be opened
The control signal of pass is directly inputted by shoot-through zero vector signal.
Further, the DC-DC converter, the power for making generator send are Ps, system output grid-connected power be
Pg, during stable state, PsWith PgApproximately equal, ultracapacitor do not work, and work as Ps＞ PgWhen, VT1 triggerings, DC-DC converter works in
Buck circuit states, ultracapacitor absorbs energy, and as Ps ＜ Pg, VT2 triggerings, DC-DC works in Boost circuit state,
Ultracapacitor releases energy.
Further, the inverter is by controlling straight-through dutycycle to realize the boosting work(with two-stage type power adjusting circuit
Can, so as to reduce the power grade of input voltage grade and inverter, while in maximum power point voltage with the big model of environment
Fluctuation is enclosed, keeps inverter output voltage to disclosure satisfy that grid-connected requirement.
Further, the machine of motor is increased both without permanent magnet or without winding on the center roller of the directly driven wind-powered system
Tool intensity, while reduce the radiating treatment requirement to motor.
Further, wind energy collecting is sent into stator permanent-magnet birotor generator by the wind energy conversion system using wind turbine impeller
In, wind energy is acted on the rotor of magneto birotor generator, converts wind energy into mechanical energy, by driving magneto is double to turn
The rotation of sub- generator amature, mechanical energy is converted into electric energy, the electric energy of gained is become by diode uncontrollable rectifier, DC-DC
Parallel operation and inverter access load after being handled.
Further, the inside and outside motor formed in the directly driven wind-powered system is concentric device, by the power of back-to-back type
Converter is powered.
Further, the directly driven wind-powered system output voltage stabilizing and DC terminal voltage stabilizing.
Further, first winding and the second winding use two sets with coil, directly driven wind-powered system low speed operation
When coil connect, coils from parallel connection of coils during high-speed cruising.
Further, two air gaps that the inside and outside motor is formed are controlled by mechanical magnetic field, mechanical magnetic field control
It is to change the excitation flux linkage of permanent magnet in the windings by adjusting the relative position of stator and rotor.
A kind of the advantages of stator permanent-magnet dual-rotor wind power generation system provided by the invention, is：The invention provides one
Kind stator permanent-magnet dual-rotor wind power generation system, is a kind of intellectuality, modularization, the device of mechanization, inverter uses Z sources
Inverter, by controlling straight-through dutycycle to be easily achieved the boost function similar with two-stage type power adjusting circuit, so as to
To reduce the power grade of input voltage grade and inverter, while the feelings in maximum power point voltage with environment wide fluctuations
During condition, inverter output voltage is kept to disclosure satisfy that grid-connected requirement, easy to adjust, the introducing of Z-source inverter circuit network causes
It is straight-through to turn into its special working condition, so as to improve the reliability of inverter, compared with two-stage circuit, Z-source inverter
Reduce an active component, reduce corresponding control circuit and protection circuit, further increase the reliability of system, and
System cost is reduced, Z-source inverter is single level system in essence, and the structure with single-stage inverter is simple, efficiency high
The advantages that, directly driven wind-powered system uses stator permanent-magnet double-rotor machine, have that power density is high, center roller is simple in construction and
The advantages of high mechanical strength, DC-DC converter maintain wind power system dc bus using control super capacitor charge-discharge electric power
The stabilization of voltage, realize voltage stabilization of the wind power system in big signal disturbance.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structured flowchart of stator permanent-magnet dual-rotor wind power generation system of the present invention；
Fig. 2 is a kind of directly driven wind-powered system structure diagram of stator permanent-magnet dual-rotor wind power generation system of the present invention；
Fig. 3 is a kind of DC-DC converter circuit schematic diagram of stator permanent-magnet dual-rotor wind power generation system of the present invention；
Fig. 4 is a kind of conventional inverter circuitry schematic diagram of stator permanent-magnet dual-rotor wind power generation system of the present invention；
Fig. 5 is a kind of Z-source inverter circuit diagram of stator permanent-magnet dual-rotor wind power generation system of the present invention；
Fig. 6 is the present invention a kind of Z-source inverter and conventional inverter of stator permanent-magnet dual-rotor wind power generation system
Can contrast table；
Wherein, 1, directly driven wind-powered system, 2, diode uncontrollable rectifier, 3, DC-DC converter, 4, inverter, 5, rotary shaft,
6th, internal rotor, the 7, first permanent magnet, the 8, first winding, 9, center roller, the 10, second winding, 11, external stator, the 12, second permanent magnetism
Body, 13, Buck circuits, 14, Boost circuit.
Embodiment
The invention discloses a kind of stator permanent-magnet dual-rotor wind power generation system, is a kind of intellectuality, modularization, machinery
The device of change, inverter use Z-source inverter, by controlling straight-through dutycycle to be easily achieved and two-stage type power adjusting circuit
Similar boost function, so as to reduce the power grade of input voltage grade and inverter, while in maximum power point electricity
When pressing the situation with environment wide fluctuations, inverter output voltage is kept to disclosure satisfy that grid-connected requirement, easy to adjust, straight wind dispelling
Electric system uses stator permanent-magnet double-rotor machine, has that power density is high, center roller is simple in construction and a high mechanical strength
Advantage.
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear and detailed
Description, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, all other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.A kind of referring to Fig. 1, stator permanent-magnet birotor provided in an embodiment of the present invention
Wind generator system.
As shown in figure 1, a kind of stator permanent-magnet dual-rotor wind power generation system, including directly driven wind-powered system 1, the straight drive
The one end of wind power system 1 connects wind energy conversion system, and the other end is connected with diode uncontrollable rectifier 2 and DC-DC converter 3, DC-DC converter
3 other ends connect inverter 4, the connection load of the other end of inverter 4；The output end voltage stabilizing of directly driven wind-powered system 1 and DC terminal
Wind energy collecting is sent into stator permanent-magnet birotor generator by voltage stabilizing, the wind energy conversion system using wind turbine impeller, wind energy effect
In on the rotor of magneto birotor generator, mechanical energy is converted wind energy into, by driving magneto birotor generator to turn
The rotation of son, electric energy is converted into by mechanical energy, by the electric energy of gained by diode uncontrollable rectifier 2, DC-DC converter 3 and inverse
Become after device 4 is handled and access load.
As shown in Fig. 2 directly driven wind-powered system 1 uses stator permanent-magnet double-rotor machine, stator permanent-magnet double-rotor machine
Including rotary shaft 5, rotary shaft 5 is axially external to be provided with internal rotor 6, and the first permanent magnet 7 is provided with the axial direction of internal rotor 6,
Internal rotor 6 is axially external to be provided with the first winding 8, and the first winding 8 is axially external to be provided with center roller 9, and center roller 9 is axially
Outside is provided with the second winding 10 and external stator 11, and the second permanent magnet 12, the He of external stator 11 are provided with the axial direction of stator 11
Center roller 9 forms outer motor, and internal rotor 6 and center roller 9 form interior motor, and inside and outside motor is concentric device, by back-to-back
The power inverter power supply of formula, internal rotor 6 and external stator 11 can regard the stator of inside and outside motor as respectively, the first permanent magnet and the
One winding is arranged on the internal rotor of interior motor, and the second permanent magnet 12 and the second winding 10 are arranged at the external stator in outer motor
On 11, two air gaps of inside and outside motor are referred to as " interior air gap " and " outer air gap ", and three parts of motor are by two air gaps point
Every, and connected on magnetic circuit；Two air gaps that the inside and outside motor is formed are controlled by mechanical magnetic field, mechanical magnetic field control
It is to change the excitation flux linkage of permanent magnet in the windings, the He of the first winding 8 by adjusting the relative position of stator and rotor
Second winding 10 uses two sets with coil, and coil is connected during the directly driven wind-powered low speed of system 1 operation, and coil is simultaneously during high-speed cruising
Join, both without permanent magnet or without winding on the center roller 9 of the directly driven wind-powered system 1, increase the mechanical strength of motor, drop simultaneously
The low radiating treatment requirement to motor
As shown in figure 3, diode uncontrollable rectifier 2 and DC-DC converter 3 it is overall using diode uncontrollable rectifier and boosting/
Be depressured compound circuit, optimize the electromagnetic design of motor, close to Udc after its output voltage is rectified under certain intermediate speed, compared with
Low speed uses booster circuit when running, and reduction voltage circuit is used when higher speed is run, so as to stable DC side voltage；The DC-
DC converters 3, the power for making generator send are Ps, the grid-connected power of system output is Pg, during stable state, PsWith PgApproximately equal,
Ultracapacitor does not work, and works as Ps＞ PgWhen, VT1 triggerings, now DC-DC converter 3 is super in the working condition of Buck circuits 13
Level capacitor absorbs energy, and as Ps ＜ Pg, VT2 triggerings, now DC-DC converter 3 is in the working condition of Boost circuit 14,
Ultracapacitor releases energy.
As shown in Figures 4 and 5, inverter 4 uses Z-source inverter, and Z-source inverter is in conventional inverter in original 8 switches
The 9th straight-through zero switching vector selector, i.e., the state that same bridge arm lower power tube simultaneously turns on, Z-source inverter are added on vector
Boost function, IGBT active switch and inductance L are realized by shoot-through zero vector stateinWith forming prime Boost together with diode A
Circuit, then connected with Z source networks, improve boost capability, inductance LinConnected with input power, continuous input current, and will not
Formed and start impulse circuit, the control signal of IGBT active switch is directly inputted by shoot-through zero vector signal；The inverter 4 is logical
Cross the straight-through dutycycle of control and realize boost function with two-stage type power adjusting circuit, so as to reduce input voltage grade and
The power grade of inverter, while keep inverter output voltage can with environment wide fluctuations in maximum power point voltage
Meet grid-connected requirement.
As shown in fig. 6, the input direct voltage for setting conventional inverter and Z-source inverter is Udc=220V, inverter bridge
Switching frequency is 10k Hz, inverter modulation ratio M=0.8, and it is D to lead directly to vector duty cycle0=0.3, simulation curve neutral voltage
0.8-1s is taken with the time shaft of phase voltage, and the time shaft of capacitance voltage and circuit input current rounds a time shaft i.e. 0-3s, leads to
Cross and largely emulate to circuit neutral voltage u1, phase voltage u2, capacitance voltage Uc, input current i carry out induction and conclusion, can be passed
Unite the performance comparison table of inverter and Z-source inverter, as shown in Figure 6, conventional inverter problem is obvious, input current it is larger and
And it is discontinuous, capacitance voltage is higher, and boost capability is limited；Z-source inverter and diode auxiliary, extended Z-source inverter possess
Identical boost capability, and it is all identical in terms of capacitance voltage stress；But diode aids in extended Z-source inverter to make multistage
Extend, further improve boost capability, therefore diode aids in extended Z-source inverter solving input current discontinuous problem
While can take into account boost capability and capacitance voltage stress, operational efficiency is high.
In summary, it is a kind of intelligent, mould the invention provides a kind of stator permanent-magnet dual-rotor wind power generation system
Block, the device of mechanization, inverter use Z-source inverter, by controlling straight-through dutycycle to be easily achieved and two-stage type work(
The similar boost function of rate adjustment circuit, so as to reduce the power grade of input voltage grade and inverter, while most
High-power voltage with environment wide fluctuations situation when, keep inverter output voltage disclosure satisfy that grid-connected requirement, adjust
It is convenient, the introducing of Z-source inverter circuit network cause it is straight-through turn into its special working condition, can so as to improve inverter
By property, compared with two-stage circuit, Z-source inverter reduces an active component, reduces corresponding control circuit and protection
Circuit, further increases the reliability of system, and reduces system cost, and Z-source inverter is single level system in essence,
The structure with single-stage inverter is simple, efficiency high, and directly driven wind-powered system use stator permanent-magnet double-rotor machine, tool
There is the advantages of power density height, center roller simple in construction and high mechanical strength, DC-DC converter is filled using control super capacitor
Discharge power maintains the stabilization of wind power system DC bus-bar voltage, realizes voltage of the wind power system in big signal disturbance steady
It is fixed.
A kind of stator permanent-magnet dual-rotor wind power generation system provided by the present invention is described in detail above, it is right
In those of ordinary skill in the art, according to the thought of the embodiment of the present invention, can in specific embodiments and applications
There is change part, in summary, this specification content should not be construed as limiting the invention.
Claims (9)
1. a kind of stator permanent-magnet dual-rotor wind power generation system, it is characterised in that described straight including directly driven wind-powered system (1)
Wind dispelling electric system (1) one end connects wind energy conversion system, and the other end is connected with diode uncontrollable rectifier (2) and DC-DC converter (3), DC-
DC converters (3) other end connection inverter (4), the connection load of inverter (4) other end；
The directly driven wind-powered system (1) uses stator permanent-magnet double-rotor machine, and stator permanent-magnet double-rotor machine includes rotation
Axle (5), rotary shaft (5) is axially external to be provided with internal rotor (6), and the first permanent magnet is provided with internal rotor (6) axial direction
(7), internal rotor (6) is axially external is provided with the first winding (8), and the first winding (8) is axially external to be provided with center roller (9),
Center roller (9) is axially external to be provided with the second winding (10) and external stator (11), and is provided with stator (11) axial direction
Electricity in two permanent magnets (12), external stator (11) and the outer motor of center roller (9) composition, internal rotor (6) and center roller (9) composition
Machine, internal rotor (6) and external stator (11) can regard the stator of inside and outside motor as respectively, and the first permanent magnet and the first winding are arranged at
On the internal rotor of interior motor, the second permanent magnet (12) and the second winding (10) are arranged on the external stator (11) of outer motor,
Two air gaps of inside and outside motor are referred to as interior air gap and outer air gap, and three parts of motor are separated by interior air gap and outer air gap,
And connected on magnetic circuit；
The diode uncontrollable rectifier (2) and DC-DC converter (3) are integrally answered using diode uncontrollable rectifier and step-up/down
Circuit is closed, close to Udc after its output voltage is rectified under certain intermediate speed 800-1200r/min, compared with low speed 800-900r/
Min uses booster circuit when running, and reduction voltage circuit is used when higher speed is run, so as to stable DC side voltage；
The inverter (4) uses Z-source inverter, and Z-source inverter possesses 9 kinds of switching vector selectors, and one of which is shoot-through zero vector
State, i.e., the state that same bridge arm lower power tube simultaneously turns on, Z-source inverter realize boosting work(by shoot-through zero vector state
Can, IGBT active switch and inductance LinConnected with forming prime Boost circuit together with diode A, then with Z source networks, improve and rise
Pressure energy power, inductance LinConnected with input power, continuous input current, and startup impulse circuit will not be formed, IGBT is active to be opened
The control signal of pass is directly inputted by shoot-through zero vector signal.
2. a kind of stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that generator is sent out
The power gone out is Ps, the grid-connected power of system output is Pg, during stable state, PsWith PgApproximately equal, ultracapacitor do not work, and work as Ps
＞ PgWhen, VT1 triggerings, DC-DC converter (3) works in Buck circuits (13) state, and ultracapacitor absorbs energy, as Ps ＜
During Pg, VT2 triggerings, DC-DC works in Boost circuit (14) state, and ultracapacitor releases energy.
A kind of 3. stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that the inversion
Device (4) is by adding the 9th straight-through zero switching vector selector, i.e., same bridge on original 8 switching vector selectors in conventional inverter
The state that arm lower power tube simultaneously turns on, inverter (4) realizes boost function by shoot-through zero vector state, so as to drop
The power grade of low input grade and inverter, while kept inverse with environment wide fluctuations in maximum power point voltage
Become device output voltage and disclosure satisfy that grid-connected requirement.
A kind of 4. stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that the straight drive
Both without permanent magnet or without winding on the center roller (9) of wind power system (1).
A kind of 5. stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that the wind-force
Wind energy collecting is sent into stator permanent-magnet birotor generator by machine using wind turbine impeller, and wind energy acts on magneto birotor
On the rotor of generator, mechanical energy is converted wind energy into, by driving the rotation of magneto birotor generator rotor, by machinery
Electric energy can be converted into, the electric energy of gained is carried out by diode uncontrollable rectifier (2), DC-DC converter (3) and inverter (4)
Load is accessed after processing.
A kind of 6. stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that the straight drive
The inside and outside motor formed in wind power system (1) is concentric device, is powered by the power inverter of back-to-back type.
A kind of 7. stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that the straight drive
Wind power system (1) output end voltage stabilizing and DC terminal voltage stabilizing.
8. a kind of stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that described first
Winding (8) and the second winding (10) use two sets with coil, and coil is connected when directly driven wind-powered system (1) low speed is run, at a high speed
Coils from parallel connection of coils during operation.
9. a kind of stator permanent-magnet dual-rotor wind power generation system according to claim 1, it is characterised in that described inside and outside
Two air gaps that motor is formed are controlled by mechanical magnetic field, and the control of mechanical magnetic field is by adjusting the relative of stator and rotor
Position changes the excitation flux linkage of permanent magnet in the windings.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108598304A (en) * | 2018-02-27 | 2018-09-28 | 安徽夏禹新能源科技有限公司 | Needle bed-type automobile batteries grading system |
| CN114123299A (en) * | 2021-10-26 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Direct-current series-parallel switching unified grid-connected system with serial double wind wheel and double rotor motors |
| CN114123296A (en) * | 2021-10-26 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Four-input single-output DC series-parallel grid-connected switching system for wind power generation |
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| CN103683989A (en) * | 2014-01-02 | 2014-03-26 | 东南大学 | Wide-input AC-DC (alternating current-direct current) converter for high-speed low-voltage power generator and control method for wide-input AC-DC converter |
| CN205753448U (en) * | 2016-06-29 | 2016-11-30 | 国网山东省电力公司阳谷县供电公司 | A photovoltaic grid-connected power generation system |
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| CN101621201A (en) * | 2009-08-06 | 2010-01-06 | 东南大学 | Composite permanent magnet brushless wind power generating set |
| CN103683989A (en) * | 2014-01-02 | 2014-03-26 | 东南大学 | Wide-input AC-DC (alternating current-direct current) converter for high-speed low-voltage power generator and control method for wide-input AC-DC converter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108598304A (en) * | 2018-02-27 | 2018-09-28 | 安徽夏禹新能源科技有限公司 | Needle bed-type automobile batteries grading system |
| CN114123299A (en) * | 2021-10-26 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Direct-current series-parallel switching unified grid-connected system with serial double wind wheel and double rotor motors |
| CN114123296A (en) * | 2021-10-26 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Four-input single-output DC series-parallel grid-connected switching system for wind power generation |
| CN114123296B (en) * | 2021-10-26 | 2023-11-07 | 中国华能集团清洁能源技术研究院有限公司 | Four-input single-output DC series-parallel grid-connected switching system for wind power generation |
| CN114123299B (en) * | 2021-10-26 | 2024-03-08 | 中国华能集团清洁能源技术研究院有限公司 | Direct current series-parallel switching unified grid-connected system of serial double wind wheel double rotor motor |
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Application publication date: 20171117 |