CN207265812U - A kind of double rotor speed regulating wind generator system - Google Patents
A kind of double rotor speed regulating wind generator system Download PDFInfo
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- CN207265812U CN207265812U CN201721389035.4U CN201721389035U CN207265812U CN 207265812 U CN207265812 U CN 207265812U CN 201721389035 U CN201721389035 U CN 201721389035U CN 207265812 U CN207265812 U CN 207265812U
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Abstract
It the utility model is related to a kind of double rotor speed regulating wind generator system, including wind wheel, gear-box, double rotor speed regulating motor, electrical excitation synchronous generator, current transformer, rectifier, transformer and switch；It is characterized in that：The double rotor speed regulating motor includes permanent-magnetic outer rotor and coiling internal rotor, and permanent-magnetic outer rotor is permanent magnet, armature winding is wound with coiling internal rotor, and permanent-magnetic outer rotor and coiling internal rotor are in the construction rotated against；The final drive shaft of wind wheel is connected by gear-box and shaft coupling with permanent-magnetic outer rotor；The current transformer includes internal rotor side rectifier and net side inverter, the coiling internal rotor of the exchange end connection double rotor speed regulating motor of internal rotor side rectifier, the DC terminal of internal rotor side rectifier connects the DC terminal of net side inverter by DC line, the low-pressure side of the exchange end connection transformer of net side inverter, the high-pressure side connection power grid of transformer.
Description
Technical field
The utility model belongs to wind power generation plant technical field, and in particular to a kind of double rotor speed regulating wind generator system
And its control method.
Background technology
Offshore wind energy resource enriches, and has an incomparable advantage of many land wind-powered electricity generations, and offshore wind farm unit present to
The trend of remote large capacity development.But development difficulty is big, construction cost is high, technology is immature, the high factor of operation and maintenance expenses
Constrain the further exploitation of offshore wind farm.
The shortcomings that current main-stream Wind turbines such as double-fed and straight drive type are respectively provided with grid-connected energy force difference, and after unit maximization
Cost and reliability index can not be taken into account.Therefore generate the theories of speed-regulating type Wind turbines, i.e., wind energy conversion system and generator it
Between by arrangements for speed regulation the wind speed of change is adjusted to constant speed, so as to drive synchronous generator to export constant frequency electric energy.
《Wind power generation system design based on permanent magnetism dual-rotor motor speed governing》The electricity generation system that one text proposes is by adjusting
Speed variator (containing governor and frequency converter) and synchronous generator composition.Governor is made of permanent-magnetic outer rotor and coiling internal rotor,
Inner and outer Rotator is in rotate against construction；Coiling internal rotor is mechanically connected with gear-box, is electrically connected with frequency converter, and frequency converter connects
Get access to grid；Permanent-magnetic outer rotor is mechanically connected with synchronous generator rotor；Synchronous generator stator connects power grid.When system works,
Frequency converter absorbs electric energy from power grid and is supplied to governor to be at electric speed regulation state, then is connected with governor outer rotor defeated
It is constant speed to go out rotating speed, so as to drive synchronous generator to send constant frequency AC to power grid.The system has power quality height, becomes
Stream device capacity is small, is effectively isolated the advantages such as destruction of the generator failure to gear-box.But governor need to be by frequency converter from power grid
Electric speed regulation state can be just operated in by absorbing part electric energy, therefore system generating efficiency is not high；Power electronic devices in frequency converter
Failure rate is higher so that system reliability is not obviously improved.
Utility model content
In view of the deficiencies of the prior art, the technical problem that the utility model intends to solve is to propose a kind of double rotor speed regulating wind
Force generating system and its control method.The system utilizes double rotor speed regulating motor tooth connection roller box and synchronous generator, overcomes
The drawbacks of traditional Wind turbines power quality is not high, grid adaptability is not strong, reliability is low, maintenance cost is high, will become with wind speed
The uncontrollable amount changed is changed into controlled amounts, transmits and adjusts while realizing electric energy and mechanical energy, reach small, cost is low,
Reliability is high, easy to control and higher levels of electrical power quality and the target of stronger grid adaptability, and it is big to better adapt to Wind turbines
The development trend of type.
The utility model solves the technical solution that the technical problem uses：It is proposed a kind of double rotor speed regulating wind-power electricity generation
System, including wind wheel, gear-box, double rotor speed regulating motor, electrical excitation synchronous generator, current transformer, rectifier, transformer and open
Close；It is characterized in that：
The double rotor speed regulating motor includes permanent-magnetic outer rotor and coiling internal rotor, and permanent-magnetic outer rotor is permanent magnet, coiling
Armature winding is wound with internal rotor, and permanent-magnetic outer rotor and coiling internal rotor are in the construction rotated against；The final drive shaft of wind wheel
It is connected by gear-box and shaft coupling with permanent-magnetic outer rotor；
The current transformer includes internal rotor side rectifier and net side inverter, and the exchange end connection of internal rotor side rectifier is double
The coiling internal rotor of rotor speed regulation motor, the DC terminal of internal rotor side rectifier connect the straight of net side inverter by DC line
Flow end, the low-pressure side of the exchange end connection transformer of net side inverter, the high-pressure side connection power grid of transformer；The electrical excitation is same
Step generator includes rotor and stator, is connected between the rotor and coiling internal rotor by axis or rod piece；Rotor connects at the same time
The DC output end of rectifier, the low-pressure side of the ac input end connection transformer of rectifier, stator pass through switch and transformer
Low-pressure side connection；Rotor of the rectifier by the AC rectification of power grid into direct current for electrical excitation synchronous generator provides direct current
Excitation；The voltage of step down side is connected to power grid after transformer boosts to 10kV.
A kind of control method of double rotor speed regulating wind generator system, to double rotor speed regulating motor permanent-magnetic outer rotor rotating speed
Control is realized using the active component for adjusting armature winding current on coiling internal rotor；To turning in double rotor speed regulating electric machine winding
The control of rotor speed is realized using the frequency for adjusting armature winding current on coiling internal rotor；
When permanent-magnetic outer rotor rotating speed is less than coiling internal rotor rotating speed, coiling internal rotor armature winding electric current forms rotation
The steering in magnetic field is identical with permanent-magnetic outer rotor steering, is turned to coiling internal rotor on the contrary, current transformer provides friendship to coiling internal rotor
Excitation is flowed, double rotor speed regulating motor absorbs active power by current transformer from power grid, in electric speed regulation state；When outside permanent magnetism turns
When rotor speed is equal to coiling internal rotor rotating speed, coiling internal rotor armature winding power frequency is 0, and current transformer is carried to coiling internal rotor
For DC excitation, exchanged between double rotor speed regulating motor and power grid without DIRECT ENERGY, in speed governing state；When permanent-magnetic outer rotor turns
When speed is higher than coiling internal rotor rotating speed, coiling internal rotor armature winding electric current forms steering and the permanent-magnetic outer rotor of rotating excitation field
Turn on the contrary, identical with coiling internal rotor steering, double rotor speed regulating motor sends active power by current transformer to power grid, is in
Speed governing generating state；
Electrical excitation synchronous generator is in synchronous generator state all the time after reaching synchronous rotational speed from rotating speed, is provided with to power grid
Work(power.
Compared with prior art, the beneficial effects of the utility model are：
The utility model double rotor speed regulating wind generator system is led to by double rotor speed regulating motor and electrical excitation synchronous generator
Cross axis or rod piece is in tandem forms, i.e., the permanent-magnetic outer rotor of speed regulating motor and gear-box mechanically connect, and turn in the coiling of speed regulating motor
The rotor of son and electrical excitation synchronous generator mechanically connects, and the uncontrollable amount changed with wind speed can be changed into controlled amounts, real
Transmit and adjust while existing electric energy and mechanical energy, have that small, cost is low, reliability is high, generating efficiency is high, easy to controlling
And the advantage such as higher levels of electrical power quality and stronger grid adaptability, it is specific as follows：
1. the internal rotor of double rotor speed regulating motor is designed as winding structure, outer rotor designs are permanent-magnet material, are conducive to
Permanent-magnetic outer rotor is outwards radiated when rotating at a high speed by the shell of double rotor speed regulating motor.
2. Tthe utility model system is designed to the redundancy structure of two back-to-back double PWM converter parallel connections, once system is examined
Current transformer failure is measured, will automatically switch on backup current transformer and continue to run with, reduces system since current transformer failure causes
Downtime, system failure rate will reduce by 50% compared with the unit of irredundant structure design.
3. the working status of Tthe utility model system includes four-stage：First stage, double rotor speed regulating motor only generate electricity
Not speed governing, electrical excitation synchronous generator do not work；Second stage, double rotor speed regulating motor play speed governing and make as electric motor operation
With absorbing electric energy from power grid, electrical excitation synchronous generator is to the specified work(that grid generation and power are electrical excitation synchronous generator
Rate PSN；Phase III, double rotor speed regulating motor is as generator operation, and not only speed governing but also power generation, electric energy, electrical excitation were sent to power grid
It is P that synchronous generator still sends rated power to power gridSNElectric energy；Fourth stage, double rotor speed regulating motor are sent to power grid
The rated power P of double rotor speed regulating motorfN, while electrical excitation synchronous generator sends the volume of electrical excitation synchronous generator to power grid
Determine power PSN。
4. the wind energy with wind speed change that wind wheel absorbs is through double rotor speed regulating electric machine speed regulation into passing to electrical excitation after constant frequency
Synchronous generator, finally sends electric energy from electrical excitation synchronous generator to power grid, therefore the system has the similar electricity of conventional power plant
Energy quality and grid-connected characteristic, overcome since the output power that traditional Wind turbines caused by the uncertainty of wind-resources occur is in
The shortcomings of power quality such as voltage deviation, voltage fluctuation and flicker and harmonic wave of fluctuation and then influence power grid.
5. when the permanent-magnetic outer rotor rotating speed of double rotor speed regulating motor is higher than coiling internal rotor rotating speed, the wind energy of wind wheel absorption
A part is through double rotor speed regulating electric machine speed regulation into passing to electrical excitation synchronous generator and by electrical excitation synchronous generator after constant frequency
Electric energy is conveyed to power grid, another part wind energy is changed into after electric energy by double rotor speed regulating motor and is transported to power grid by current transformer,
Realize from double rotor speed regulating motor and electrical excitation synchronous generator and feed electric energy to power grid at the same time, thus system generated energy with it is identical
Traditional full power convertor Wind turbines of rated power, which are compared, can increase by 0.8%.
6. the ratio between the rated power of double rotor speed regulating motor and electrical excitation synchronous generator rated power are 1:When 2, speed governing
Machine can reach the operating point of rated power in the case where electric speed regulation and speed governing generate electricity two kinds of working statuses, can be to greatest extent
Electric energy is transformed wind energy into, also just improves the utilization rate of governor.Therefore, with the coiling internal rotor phase of double rotor speed regulating motor
Converter Capacity even reduces 67% compared with the Converter Capacity of the identical traditional full power convertor unit of rated power,
Therefore volume can reduce by 41%, weight can mitigate 63%.
Brief description of the drawings
Fig. 1 is double rotor speed regulating wind generator system structure chart.
Fig. 2 is the rotating speed and changed power trend of double rotor speed regulating wind generator system under different wind speed.
In Fig. 2,1 wind wheel, 2 gear-boxes, 3 double rotor speed regulating motors (or governor), 4 electrical excitation synchronous generators are (or same
Step machine), 5 current transformers, 6 rectifiers, 7 transformers, 3.1 permanent-magnetic outer rotors, 3.2 coiling internal rotors, 4.1 stators, 4.2 rotors, 5.1
Internal rotor side rectifier, 5.2 net side inverters.
Embodiment
The utility model is explained further with reference to embodiment and attached drawing, but is not wanted in this, as to the application right
Ask the restriction of protection domain.
The utility model double rotor speed regulating wind generator system (abbreviation system, referring to Fig. 1) include wind wheel 1, gear-box 2,
Double rotor speed regulating motor 3, electrical excitation synchronous generator 4, (the rated capacity P of current transformer 5fNKVA), rectifier 6,7 and of transformer
Switch 8；
The double rotor speed regulating motor 3 includes permanent-magnetic outer rotor 3.1 and coiling internal rotor 3.2, and permanent-magnetic outer rotor 3.1 is forever
Magnet, is wound with armature winding on coiling internal rotor 3.2, and permanent-magnetic outer rotor 3.1 and coiling internal rotor 3.2 are in the structure rotated against
Make；The final drive shaft of wind wheel 1 is connected by gear-box 2 and shaft coupling with permanent-magnetic outer rotor 3.1, and final drive shaft is increased by gear-box
By wind wheel 1, caused power passes to through shaft coupling the permanent-magnetic outer rotor of double rotor speed regulating motor 3 under wind-force effect after speed
3.1, permanent-magnetic outer rotor 3.1 is obtained corresponding rotating speed；
The current transformer 5 includes internal rotor side rectifier 5.1 and net side inverter 5.2, internal rotor side rectifier 5.1 and net
Side inverter 5.2 is connected using DC line, the exchange end connection double rotor speed regulating motor 3 of internal rotor side rectifier 5.1 around
Line internal rotor 3.2, the DC terminal of internal rotor side rectifier 5.1 connect the DC terminal of net side inverter 5.2, net by DC line
The low-pressure side of the exchange end connection transformer 7 of side inverter 5.2, the high-pressure side connection power grid of transformer 7；The electrical excitation is synchronous
Generator 4 includes rotor 4.2 and stator 4.1, is connected between the rotor 4.2 and coiling internal rotor 3.2 by axis or rod piece；Turn
Son 4.2 connects the DC output end of rectifier 6, the low-pressure side of the ac input end connection transformer 7 of rectifier 6, stator at the same time
4.1 are connected by switch 8 with the low-pressure side of transformer 7；Rectifier 6 is same for electrical excitation into direct current by the AC rectification of power grid
The rotor 4.2 for walking generator 4 provides DC excitation；The voltage of 7 low-pressure side of transformer is connected to after transformer boosts to 10kV
Power grid.
The rated power P of the electrical excitation synchronous generator 4SNFor the rated power P of double rotor speed regulating motor 3fNN times,
N is integer not less than 2, when preferably N=2, N=2 speed regulating motor in the case where electric speed regulation and speed governing generate electricity two kinds of working statuses
The operating point of rated power can be reached, electric energy can be transformed wind energy into greatest extent, also just improve speed regulating motor
Utilization rate.If N ≠ 2, when synchronous generator reaches rated condition operation, speed regulating motor can only be assigned in electric speed regulation state
To specified operating point, and it is unable to reach specified operating point all the time under speed governing generating state.
There are two parallel connections double PWM converters back-to-back, when a current transformer failure, another work in the system.
The model XE93 TFDD2000 of the electrical excitation synchronous generator.
The control method of above-mentioned double rotor speed regulating wind generator system, in the coiling by adjusting double rotor speed regulating motor
The active component of rotor current, controls the rotating speed of the permanent-magnetic outer rotor of double rotor speed regulating motor, passes through double rotor speed regulating motor
Permanent-magnetic outer rotor obtains the optimum torque of wind wheel, so as to capture maximal wind-energy；In coiling by adjusting double rotor speed regulating motor
The power frequency of rotor, controls the rotating speed of double rotor speed regulating electric machine winding internal rotor, reaches coiling internal rotor and stablize in electricity
The synchronous rotational speed of excitation synchronous generator, then the output rotating speed of double rotor speed regulating motor is the same of electrical excitation synchronous generator
Rotating speed is walked, the synchronous generator for electrical excitation synchronous generator provides condition.
The operation principle of the utility model double rotor speed regulating wind generator system is：Since double rotor speed regulating motor 3 is by forever
Magnetic outer rotor 3.1 and coiling internal rotor 3.2 are formed, according to Electrical Motor principle, the energy converting between mechanical to realize stabilization, and double turns
The permanent-magnetic outer rotor 3.1 of sub- speed regulating motor 3 must keep opposing stationary with the rotating excitation field of coiling internal rotor 3.2, it is possible thereby to
Obtain the rotating speed equilibrium relation of double rotor speed regulating motor 3：
nout=nin+nf (1)
In formula (1), noutFor the rotary speed of permanent-magnetic outer rotor 3.1 under external force, ninFor coiling internal rotor 3.2
Mechanical separator speed, nfThe rotating speed that the electric current that frequency is f forms rotating excitation field is passed through by the armature winding on coiling internal rotor 3.2.
By adjusting the active component of the electric current of armature winding on coiling internal rotor 3.2, pass through double rotor speed regulating motor 3
Permanent-magnetic outer rotor 3.1 obtains the optimum torque of wind wheel 1, reaches the target of maximal wind-energy capture；At the same time according to noutChange it is real-time
The frequency f of armature winding current on coiling internal rotor 3.2 is adjusted, i.e., controls n on the premise of formula (1) is metfEnsure ninReach
And stablize the synchronous rotational speed n in electrical excitation synchronous generator 40, i.e. nin=n0, then the output rotating speed of double rotor speed regulating motor 3
It is n for the rotating speed of electrical excitation synchronous generator 40, therefore electrical excitation synchronous generator 4 reaches the condition of synchronous generator, to power grid
Active-power P is providedS。
Work as nout＜ ninWhen, nf＜ 0, on coiling internal rotor 3.2 electric current of armature winding formed the steering of rotating excitation field with forever
Magnetic outer rotor 3.1 turns to identical, is turned to coiling internal rotor 3.2 on the contrary, current transformer 5 is provided to coiling internal rotor 3.2 exchanges and encourage
Magnetic, double rotor speed regulating motor 3 absorb electric energy from power grid；Work as nout=ninWhen, nf=0, winding current frequency on coiling internal rotor 3.2
Rate is 0, and current transformer 5 provides DC excitation to coiling internal rotor 3.2, without DIRECT ENERGY between double rotor speed regulating motor 3 and power grid
Exchange；Work as nout＞ ninWhen, nf＞ 0, winding current forms steering and the permanent-magnetic outer rotor of rotating excitation field on coiling internal rotor 3.2
3.1 turn on the contrary, being turned to coiling internal rotor 3.2 identical, and double rotor speed regulating motor 3 sends electric energy by current transformer 5 to power grid.
It can obtain the power-balance relation of double rotor speed regulating motor 3 according to law of conservation of energy：
Pm+Pf=PL (2)
In formula (2), PmThe wind energy captured for wind wheel 1, that is, input the mechanical output of double rotor speed regulating motor 3；PfFor birotor
The electrical power of speed regulating motor 3；PLThe input of the mechanical output, i.e. electrical excitation synchronous generator 4 that are exported for double rotor speed regulating motor 3
Power.
Work as Pm＜ PLWhen, Pf＞ 0, represents that double rotor speed regulating motor 3 is in motoring condition, is absorbed by current transformer 5 from power grid
Active power；Work as Pm＞ PLWhen, Pf＜ 0, represents that double rotor speed regulating motor 3 is in generating state, is sent out by current transformer 5 to power grid
Go out active power；Work as Pm=PLWhen, Pf=0, represent that noenergy exchanges between double rotor speed regulating motor 3 and power grid.
According to Electrical Motor principle, convolution (2) can derive the torque transitive relation of double rotor speed regulating motor 3：
Tmωout+Teωf=TLωin (3)
In formula (3), ωoutFor the mechanical angular speed of permanent-magnetic outer rotor 3.1, ωinFor the mechanical angle speed of coiling internal rotor 3.2
Degree, ωfThe angular speed of rotating excitation field is formed by armature winding current on coiling internal rotor 3.2；TeFor double rotor speed regulating motor 3
Electromagnetic torque, TmTo input the machine torque of double rotor speed regulating motor 3, TLTurn for the output machinery of double rotor speed regulating motor 3
Square.
The expression formula that the electromagnetic torque of double rotor speed regulating motor 3 can be derived by formula (3) is formula (4)：
By analogue simulation, the electromagnetic torque of double rotor speed regulating motor 3 can be obtained with the mechanical angle of permanent-magnetic outer rotor 3.1
Speed omegaoutWith the mechanical angular velocity omega of coiling internal rotor 3.2inThe rising of difference be in logarithm downward trend.
Since electrical excitation synchronous generator 4 is in tandem by axis or rod piece with double rotor speed regulating motor 3, therefore electrical excitation is synchronously sent out
The rotating speed of the rotor 4.2 of motor 4 is equal with the rotating speed moment of the coiling internal rotor 3.2 of double rotor speed regulating motor 3.Work as nin=n0
When, the rotating speed of the rotor 4.2 of electrical excitation synchronous generator 4 reaches n0, meet the requirement of synchronous generator, thus it is right by rectifier 6
The rotor 4.2 of electrical excitation synchronous generator 4 provides DC excitation, and stator 4.1 sends the alternating current that frequency is 50Hz to power grid.
The working status of the utility model double rotor speed regulating wind generator system has four kinds of work according to the change of wind speed
The power generation of stage, i.e. governor, governor electric speed regulation, governor speed governing power generation and system nominal operation；
1) the Ith stage：Governor generates electricity
In this stage, switch 8 is disconnected, i.e. the stator 4.1 of electrical excitation synchronous generator 4 is disconnected with power grid, then
Electrical excitation synchronous generator 4 does not work, and only double rotor speed regulating motor 3 works, thus with the rotor 4.2 of electrical excitation synchronous generator 4
The coiling internal rotor 3.2 of connected double rotor speed regulating motor 3 maintains static, which is equivalent to traditional permanent-magnetic outer rotor coiling
The full power convertor wind-driven generator of inner stator；
Wind speed reaches incision wind speed vinAfterwards, the permanent-magnetic outer rotor 3.1 of double rotor speed regulating motor 3 obtains corresponding rotating speed nout,
noutIncrease with the rising of wind speed v since 0；The current transformer 5 being connected with coiling internal rotor 3.2 is by winding on coiling internal rotor 3.2
The frequency-changing AC electric rectification of output is reverse into 50Hz alternating currents and is delivered to power grid, power Pf, realize that variable speed constant frequency is run；When double
The generated output of rotor speed regulation motor 3 reaches the rated power P of double rotor speed regulating motorfNWhen, by the closure of switch 8, i.e. electrical excitation
The stator 4.1 of synchronous generator 4 is connected with power grid, and system enters the IIth stage running, and wind speed at this time is v1；
The power flow direction of this stage system is as shown in solid arrow in Fig. 1：The wind energy that wind wheel 1 absorbs is by double rotor speed regulating electricity
Machine 3 changes into after electric energy and is transported to power grid through current transformer 5.
2) the IIth stage：Governor electric speed regulation
Wind speed is from v1Continue to increase, noutRise with wind speed and continue to increase；Due to the closure of switch 8, electrical excitation synchronous generator
4 stator 4.1 is connected with power grid, then electrical excitation synchronous generator 4 is started to work, thus with the rotor of electrical excitation synchronous generator 4
The coiling internal rotor 3.2 of 4.2 connected double rotor speed regulating motors 3 will start to rotate, i.e. ninBegun to ramp up by 0；Due to regulation and control around
The frequency f of armature winding current makes n on line internal rotor 3.2inIt is rapidly reached and stablizes in n0, n at this timeout＜ nin=n0, then rotate
The rotating speed n in magnetic fieldf＜ 0, current transformer 5 absorb active power from power grid and are supplied to double rotor speed regulating motor 3, double rotor speed regulating motor
3 are in electric speed regulation state, Pf＞ 0 and PfAfter first increasing with the change of permanent-magnetic outer rotor 3.1 and 3.2 speed discrepancy of coiling internal rotor
Reduce；Work as noutRise with wind speed and increase to nout=nin=n0When, nf=0, current transformer 5 provides direct current for coiling internal rotor 3.2 and encourages
Magnetic, double rotor speed regulating motor 3 only play speed governing, Pf=0, at this time system enter the IIIth stage running, corresponding wind speed is v2；
In addition, the rotating speed of electrical excitation synchronous generator 4 is n0, therefore electrical excitation synchronous generator 4 is in synchronous generator state,
The rated power P of electrical excitation synchronous generator is provided to power gridSN。
The power flow direction of this stage system is as indicated by the dashed arrow in fig. 1：The wind energy that wind wheel 1 absorbs is through double rotor speed regulating electricity
Electrical excitation synchronous generator 4 is passed to after 3 speed governing of machine and is delivered to power grid, while current transformer 5 absorbs Partial Power from power grid and carries
Supply double rotor speed regulating motor 3.
3) the IIIth stage：Governor speed governing generates electricity
Wind speed is from v2Continue to increase, noutRise with wind speed and continue to increase, at this time nout＞ nin=n0, therefore nf＞ 0, birotor
Speed regulating motor 3 sends active power by current transformer 5 to power grid, in speed governing generating state, Pf＜ 0 and | Pf| turn with outside permanent magnetism
The increase of sub 3.1 rotating speeds and gradually increase；Work as noutRise with wind speed and increase to rated speed i.e. nout=noutNWhen, system reaches volume
Determine operating status, into the IVth stage running, wind speed at this time is rated wind speed vN；
The rotating speed of the stage electrical excitation synchronous generator 4 is n0, therefore electrical excitation synchronous generator 4 is in synchronous generator shape
State, the rated power P of electrical excitation synchronous generator is provided to power gridSN；
The power flow direction of this stage system is as shown in dotted line arrow in Fig. 1：The wind energy part that wind wheel 1 absorbs turns through double
Electrical excitation synchronous generator 4 is passed to after sub- 3 speed governing of speed regulating motor and is delivered to power grid, and another part is by double rotor speed regulating motor
3 change into after electric energy and are transported to power grid through current transformer 5.
4) the IVth stage：System nominal is run
Wind speed is from rated wind speed vNContinue to increase, by adjusting the wind energy of the award setting system acquisition, ensure system
Operate in rated condition：nout=noutN, rated power P of the double rotor speed regulating motor 3 to power grid output double rotor speed regulating motorfN,
Rated power P of the electrical excitation synchronous generator 4 to power grid output electrical excitation synchronous generator at the same timeSN。
The utility model control method can make the rotating speed of the coiling internal rotor of double rotor speed regulating motor reach constant speed n0, this
The rotor speed for the electrical excitation synchronous generator that sample is mechanically connected with double rotor speed regulating electric machine winding internal rotor has also reached this
Constant speed n0, this meets the requirement of electrical excitation synchronous generator synchronous generator just, i.e. electrical excitation synchronous generator can be to power grid
Send the electric energy of rated power.
The utility model does not address part and is suitable for the prior art.
Claims (4)
1. a kind of double rotor speed regulating wind generator system, including wind wheel, gear-box, double rotor speed regulating motor, electrical excitation are synchronously sent out
Motor, current transformer, rectifier, transformer and switch；It is characterized in that：
The double rotor speed regulating motor includes permanent-magnetic outer rotor and coiling internal rotor, and permanent-magnetic outer rotor is permanent magnet, is turned in coiling
Armature winding is wound with son, and permanent-magnetic outer rotor and coiling internal rotor are in the construction rotated against；The final drive shaft of wind wheel passes through
Gear-box and shaft coupling are connected with permanent-magnetic outer rotor；
The current transformer includes internal rotor side rectifier and net side inverter, the exchange end connection birotor of internal rotor side rectifier
The coiling internal rotor of speed regulating motor, the DC terminal of internal rotor side rectifier connect the direct current of net side inverter by DC line
End, the low-pressure side of the exchange end connection transformer of net side inverter, the high-pressure side connection power grid of transformer；The electrical excitation is synchronous
Generator includes rotor and stator, is connected between the rotor and coiling internal rotor by axis or rod piece；Rotor connects whole at the same time
The DC output end of device is flowed, the low-pressure side of the ac input end connection transformer of rectifier, stator is by switching and transformer
Low-pressure side connects.
2. double rotor speed regulating wind generator system according to claim 1, it is characterised in that the electrical excitation synchronous generator
The rated power of machine is PSNFor the rated power P of double rotor speed regulating motorfN2 times.
3. double rotor speed regulating wind generator system according to claim 1, it is characterised in that have two parallel connections in the system
Double PWM converters back-to-back.
4. double rotor speed regulating wind generator system according to claim 1, it is characterised in that the electrical excitation synchronous generator
The model XE93 TFDD2000 of machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721389035.4U CN207265812U (en) | 2017-10-25 | 2017-10-25 | A kind of double rotor speed regulating wind generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721389035.4U CN207265812U (en) | 2017-10-25 | 2017-10-25 | A kind of double rotor speed regulating wind generator system |
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| Publication Number | Publication Date |
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| CN207265812U true CN207265812U (en) | 2018-04-20 |
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ID=61915956
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931221A (en) * | 2019-03-28 | 2019-06-25 | 华中科技大学 | A kind of double speed permanent magnetism wind power generation system |
| CN114256870A (en) * | 2021-11-16 | 2022-03-29 | 国家电投集团科学技术研究院有限公司 | Wind power generation system and control method of wind power generation system |
-
2017
- 2017-10-25 CN CN201721389035.4U patent/CN207265812U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931221A (en) * | 2019-03-28 | 2019-06-25 | 华中科技大学 | A kind of double speed permanent magnetism wind power generation system |
| CN114256870A (en) * | 2021-11-16 | 2022-03-29 | 国家电投集团科学技术研究院有限公司 | Wind power generation system and control method of wind power generation system |
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