CN103874851B - Wind-force squirrel-cage influence generator with low voltage crossing - Google Patents
Wind-force squirrel-cage influence generator with low voltage crossing Download PDFInfo
- Publication number
- CN103874851B CN103874851B CN201180072549.6A CN201180072549A CN103874851B CN 103874851 B CN103874851 B CN 103874851B CN 201180072549 A CN201180072549 A CN 201180072549A CN 103874851 B CN103874851 B CN 103874851B
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- CN
- China
- Prior art keywords
- squirrel
- cage
- capacitor
- influence generator
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000004044 response Effects 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 53
- 230000005284 excitation Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
- F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
-
- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- 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
- H02P9/06—Control effected upon clutch or other mechanical power transmission means and dependent upon electric output value of the generator
-
- 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
- H02P9/46—Control of asynchronous generator by variation of capacitor
-
- 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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A kind of wind power plant, including：Wind rotor, transformer, squirrel-cage influence generator and power network clutch.The squirrel-cage influence generator includes cage rotor, and the cage rotor is driven by the wind rotor, for via the transformer to utility grid.The power network clutch departs from response to Voltage Drop and by the squirrel-cage influence generator from the power network, and the speed of the cage rotor is controlled during the Voltage Drop.
Description
Technical field
The present invention relates to electric energy generator, and more particularly to blower fan.
Background technology
The wind-driven generator of common type is squirrel-cage influence generator.In such generator, it is necessary to stator around
Electric current is maintained in group, electric current otherwise can not be induced on mouse cage.This electric current can derive from power network in itself.
Problem can be produced when Voltage Drop occurs in power network.Such Voltage Drop is probably to be caused by various interference
, most of such interference are not controlled by anyone.
In this case, it is expected that cage rotor continues to rotate during Voltage Drop so that once voltage recovers
It just can soon reconnect to power network.Realize that the generator of this purpose is known as " tiding over " or " passing through " low-voltage thing
Part.Similarly, such generator is referred to as having " low voltage crossing " ability.
One of influence of Voltage Drop is electric current too high in generator.This makes rotor rotate more again in turn
It hurry up.Many influence generators have and will stop or slow down the protection mechanism of rotor when rotor rotation is too fast.Due to low-voltage thing
Part, if cage rotor rotation enough to fast so that activate this protection system, influence generator reconnection is connected on power network
The problem of will be more difficult from.
The old-fashioned influence generator used in blower fan lacks appropriate low voltage ride-through capability.Due to influence generator
This larger installation foundation, it is more more economical than replacing them to transform existing generator.
Known reconstruction structure is dependent on uninterrupted power source or dependent on voltage restorer.These power supplys or voltage restorer
It is inserted in series between the transformer of blower fan and the remainder of electrical system.
The known remodeling method that low voltage crossing is assembled for squirrel-cage influence generator is often expensive, partly cause
It is to need many extra parts.Complexity can cause the shortage of reliability as caused by their construction, and therefore cause
Higher maintenance cost.In addition, voltage restorer is to cause loss.
The content of the invention
On the one hand, it is a feature of the present invention that a kind of wind power plant.Such equipment includes：Wind rotor, transformation
Device, squirrel-cage influence generator and power network clutch.The squirrel-cage influence generator includes cage rotor, the mouse cage
Formula rotor is driven by the wind rotor, for via the transformer to utility grid.The power network clutch response
The squirrel-cage influence generator is departed from from the power network in Voltage Drop, and during the Voltage Drop described in control
The speed of cage rotor.
In certain embodiments, the power network clutch include excitation capacitor, capacitor switch and with the excitation
Capacitor dynamic brake in parallel.The capacitor switch selectivity connects the excitation capacitor and the stator winding
Connect.The dynamic brake includes brake switch, and the brake switch is used for selectivity to dump resistor transfer current to consume
Dissipate energy.
In addition to foregoing embodiments, there are those embodiments for also including clutch controller, the clutch controller is used
In the control brake switch and the capacitor switch.Some in these embodiments also include and the clutch controller
The sensing system of connection.The sensing system provides information used in the clutch controller for controlling the system
Dynamic switch and the capacitor switch.
In addition to embodiments of the invention, there are those described clutch controllers to further comprise STS
Embodiment.There is the embodiment that those described clutch controllers further comprise clutch controller in addition to these embodiments,
The clutch controller is used to control the STS, the brake switch and the capacitor switch.Except including
Outside each embodiment of clutch controller, there are those embodiments for including sensing system, the sensing system is connected to
The clutch controller, for being provided to the clutch controller for controlling the STS, the brake switch
And the information of the capacitor switch.
Further embodiments are the embodiments that those described clutch controllers have STS, described static turn
Change switch selectivity and the stator winding is connected to the transformer.Some in these embodiments also include clutch for clutch control
Device, for controlling the STS.There are those embodiments for also including sensing system in addition to these embodiments,
The sensing system is used to provide the information for controlling the STS to the clutch controller.The opposing party
Face, it is a feature of the present invention that a kind of wind power plant.Such equipment includes wind rotor；Transformer；With squirrel-cage
The squirrel-cage influence generator of rotor, the cage rotor collect surface drive by wind-force, for via the transformer to
Utility grid；The squirrel-cage influence generator is connect with the utility network for selective in response to Voltage Drop
The device for closing and departing from from the utility network；And for controlling the cage rotor during the Voltage Drop
The device of speed.
Another aspect of the invention is a kind of low electricity for making wind-force squirrel-cage influence generator pass through on utility network
The method of pressure event.Such method includes：Detect low power event；The mouse cage is disconnected in response to the low power event
The connection of formula influence generator and the utility network；And when the squirrel-cage influence generator and the utility network disconnect
During connection, the squirrel-cage influence generator is set to maintain the voltage and current with special characteristic.
In some implementations, the squirrel-cage influence generator is made to maintain the voltage and current bag with special characteristic
Include：Selectivity makes the stator winding of the electric charge inflow squirrel-cage influence generator.
In other implementations, the squirrel-cage influence generator is set to maintain the voltage and current bag with special characteristic
Include：Selectivity makes to induce electric current in the cage rotor of the squirrel-cage influence generator.
The optional implementation of the present invention also includes some such embodiments, wherein, make the squirrel-cage sensing hair
Motor maintains the voltage and current with special characteristic to include：The electricity that selectivity dissipates by the generation of above-mentioned squirrel-cage influence generator
Power.In these implementations, the squirrel-cage influence generator is set to maintain the voltage and current with special characteristic further
Including：Selectivity makes the stator winding of the electric charge inflow squirrel-cage influence generator.
Other implementations of the present invention include some such embodiments, wherein, make the squirrel-cage influence generator
The voltage and current with special characteristic is maintained to include：Monitor the electric output of the squirrel-cage influence generator；And response
In the electric output monitored, capacitor is connected to the squirrel-cage influence generator by selectivity.In these implementations
In some, the squirrel-cage influence generator is set to maintain the voltage and current with special characteristic to include：In response to what is monitored
Electrically export and the selective electric power generated by the influence generator that dissipates.
Other implementations of the present invention further comprise the steps：Detect the line voltage distribution on the utility network
Recover；And as response, the squirrel-cage influence generator and the utility network are reconnected.
By features as discussed above, these and other features of the invention will be apparent from.
Brief description of the drawings
Fig. 1 shows a kind of structure of the engineered squirrel-cage influence generator in blower fan.
The detailed description of invention
Fig. 1 shows the wind rotor 10 with the mechanical communication of gear-box 12.Gear-box 12 makes in squirrel-cage influence generator
Cage rotor rotate, to supply power to utility network 15 via power network side transformer 18.Generator 14 and wind-force turn
Power network clutch 20 between son 10 is selective by squirrel-cage influence generator in response to the instruction from clutch controller 22
14 are engaged with transformer 18, and squirrel-cage influence generator 14 is departed from from transformer 18.
Power network clutch 20 includes STS 24, and it is arranged for selectivity and interrupts transformer 18 and squirrel-cage
The electric current on main bus 26 between influence generator 14.Each phase of typical STS 24 include a pair it is in parallel but
IGCT 28A, 28B with opposite polarity, the grid current of IGCT are controlled by clutch controller 22.
Power network clutch 20 also includes the excitation capacitor 32 for being connected to main bus 26.The electricity controlled by clutch controller 22
Excitation capacitor 32 is connected by the selectivity of container valve 34 with main bus 26, and disconnects excitation capacitor 32 and main bus 26
Connection.
Many wind turbine power generation machines have had the capacitor bank of power factor controlling capacitor, for injecting quadrature current,
And thus control power factor.During normal operation, these power factor controlling capacitors may be switched and depart from
Circuit.In these cases, same capacitor bank can be reused for answering exciting current as excitation capacitor 32.Due to
Two kinds of different functions of same capacitor bank have been used, has avoided and extra part is provided, this is particularly advantageous.
In other wind turbine power generation machines, power factor controlling capacitor can not have to be set nominally to provide exciting current institute
Necessary bigger electric current.In these embodiments, excitation capacitor 32 is realized by single and extra capacitor bank.
In this case, when excitation capacitor 32 will be connected with squirrel-cage influence generator 14, power factor controlling capacitor should break
Open the connection with squirrel-cage influence generator 14.
In parallel with excitation capacitor 32 is dynamic brake 30, and it has：Diode for commutator generator voltage
Electric bridge 35；The automatic switch 36 controlled by clutch controller 22；And the dump resistor 38 in parallel with brake switch 36.Pass through
Control brake switch 36, the selectivity of clutch controller 22 passes a current through dump resistor 38, thus using the energy of surplus as
Heat dissipates.This allows clutch controller 22 in STS 24 by squirrel-cage influence generator 14 from change again in turn
The rotary speed of the cage rotor of squirrel-cage influence generator 14 is adjusted when depressor 18 departs from.
Clutch controller 22 controls STS 24, capacitor in response to the measured value that three sensors are provided
Switch 34 and brake switch 36, three sensors include：Sense the transformer side voltage sensor 40 of transformer voltage；Sense
Survey the generator side voltage sensor 42 of generator voltage；And the generator side current sensor 44 of sensing dynamo current.
Transformer side voltage sensor 40 is arranged between STS 24 and transformer 18 so that even if static turn
Change switch 24 to open, clutch controller 22 can also monitor the voltage of power network 15.Generator side voltage sensor 42 and generating
Side currents sensor 44 is arranged between STS 24 and squirrel-cage influence generator 14 so that even if static conversion
Switch 24 departs from squirrel-cage influence generator 14 from transformer 18, can also measure this tittle.
In response to detecting Voltage Drop via transformer side voltage sensor 40, clutch controller 22 controls static conversion
Switch 24.Because IGCT is automatically stopped conducting when electric current is down to certain threshold value, STS 24 is in next electric current
Zero crossing is opened.
In addition, clutch controller 22 closes capacitor switch 34, hence in so that can be stored from excitation capacitor 32
The quadrature current for generator excitation is supplied in electric charge.In order to maintain alternator speed, the selectivity of clutch controller 22 is beaten
Brake switch 36 is opened and closes, thus selectivity is by the dissipation energy of dump resistor 38.
In three-phase circuit, each phase will have a STS 24.As a result, the static conversion of a phase is opened
Closing 24 can run independently of other two STS.
Clutch controller 22 is also enough to be re-engaged squirrel-cage sensing generating via the sensing of transformer side voltage sensor 40
Machine 14 and power network 15, line voltage recovery.After such recover is sensed, clutch controller 22 passes through re-synchronization mouse
The leading voltage at voltage and power network 15 that cage influence generator 14 generates starts to be re-engaged program.By controlling dynamic
Brake 30 realizes this point, by the phase angular alignment of generator voltage and line voltage.Although squirrel-cage sensing generates electricity
The voltage magnitude of machine 14 may be different with the leading voltage of power network 15 on this aspect, but for each phase, still can be by making static state
Change-over switch 24 is re-engaged this mutually to perform re-synchronization in its next zero crossing.
Wind-driven generator described in the present invention is difficult to control to participate in the voltage of power network 15 by injecting quadrature current.
In order to eliminate this shortcoming, some embodiments are further characterized in that three phase converer, and the three phase converer can be used for injecting reactance
Property electric current.Not needing cooling system to can reach makes such converter of short duration degree used only during Voltage Drop.
The advantage of foregoing improved structure is from its low cost, and its low cost comes from the reuse of existing part.Example
Such as, many generators of this area have compensation capacitor, and the compensation capacitor is used as excitation capacitor 32, for
To generator 14 exciting current is provided after power network clutch 20 departs from generator 14 from power network 15.
Because it only needs the extra part of minimum number, the improved structure also than it is of the prior art those more
Simply.Under this simplicity in terms of derivative reliability, foregoing improved structure also than it is of the prior art those more may be used
Lean on.
It is different from known structure, foregoing structure run under autoexcitation pattern squirrel-cage influence generator 14 and by its
The speed of cage rotor is maintained in the boundary of delimitation.
In certain embodiments, clutch controller 22 is a kind of processing system, the processing system perform with software, hardware or
The form of software and hardware combining is stored in the clutch for clutch control instruction on palpable and non-volatile computer readable medium.So
Processing system include cooperation to manipulate the various semiconductor equipments of its positive and negative charge carrier included.
To perform a kind of method, this method is used in response to from each sensor described above for clutch for clutch control instruction cooperation
Measured value and control multiple switch.So, this method is associated with a kind of special machine, and the machine includes at least foregoing each
Switch and sensor.
Foregoing each switch is obviously made up of the material representated by the term that those skilled in the art is understood.Switch is beaten
Open and close is obviously the conversion of material.Therefore, this method is not limited only to special machine described above, and its execution is also drawn
Play the conversion of material.
The present invention and its preferred embodiment has been described, we claim to be novelty and by patent protection be to enclose
Claims.
Claims (4)
1. a kind of wind power plant, the equipment includes：
Wind rotor；
Transformer；
Squirrel-cage influence generator with cage rotor, the squirrel-cage influence generator are driven by the wind rotor,
For via the transformer to utility grid；And
Power network clutch, the power network clutch include：
Capacitor bank with power factor controlling capacitor, for the squirrel-cage influence generator provide exciting current with
And the power factor of the utility network is output to for controlling；
Capacitor switch, the capacitor switch are used to the capacitor bank optionally is connected into the squirrel-cage sensing hair
Motor；
Dynamic brake, the dynamic brake is in parallel with the capacitor bank, and the dynamic brake includes brake switch, institute
Brake switch is stated to be used for optionally to dump resistor transfer current with dissipation energy；
STS, the STS are used for optionally by the squirrel-cage influence generator and the electric capacity
Device group is connected to the transformer；
The clutch controller of the STS is controlled, for sensing the squirrel-cage and generating electricity in response to Voltage Drop
Machine and the capacitor bank are departed from from the utility network by power-down mode；
The clutch controller controls the closing of capacitor switch during Voltage Drop, so that the capacitor bank is to institute
State squirrel-cage influence generator and provide exciting current so that the squirrel-cage influence generator is run under autoexcitation pattern；
And
The clutch controller, the brake switch is selectively opened and closed during Voltage Drop to cause dump resistance
Device dissipation energy, so that by the speed control of cage rotor in the speed of limitation.
2. equipment as claimed in claim 1, further comprises sensing system, it is connected to the clutch controller, is used for
There is provided to the clutch controller for controlling the STS, the brake switch and the capacitor switch
Information.
3. a kind of method of wind-power electricity generation, including：
Wind rotor and transformer are provided；
Squirrel-cage influence generator of the wind rotor driving with cage rotor, so as to via the transformer to utility network
Power supply；
Power network clutch is provided, the power network clutch includes：
Capacitor bank with power factor controlling capacitor, the capacitor bank provide excitation electricity to squirrel-cage influence generator
Stream and control are output to the power factor of the utility network；
The capacitor bank is optionally connected to the squirrel-cage sensing and generated electricity by capacitor switch, the capacitor switch
Machine；
Dynamic brake is in parallel with the capacitor bank, and the dynamic brake includes brake switch, the brake switch selection
Property to dump resistor transfer current with dissipation energy；
The squirrel-cage influence generator and capacitor bank are optionally connected to the transformer by STS；
Clutch controller controls the STS, in response to Voltage Drop by the squirrel-cage influence generator and institute
Capacitor bank is stated from the power network by power-down mode to depart from；
The clutch controller controls the closing of capacitor switch during Voltage Drop, so that the capacitor bank is to institute
State squirrel-cage influence generator and provide exciting current so that the squirrel-cage influence generator is run under autoexcitation pattern；
The clutch controller, brake switch is selectively opened and closed during Voltage Drop to cause dump resistor to consume
Energy is dissipated, so that by the speed control of cage rotor in the speed of limitation.
4. method as claimed in claim 3, further comprising sensing control information, and institute is provided to the clutch controller
Control information is stated for controlling brake switch, the capacitor switch and the STS.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2011/045825 WO2013019173A1 (en) | 2011-07-29 | 2011-07-29 | Wind-powered squirrel-cage induction generator with low voltage ride through |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103874851A CN103874851A (en) | 2014-06-18 |
| CN103874851B true CN103874851B (en) | 2018-02-09 |
Family
ID=44509657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180072549.6A Expired - Fee Related CN103874851B (en) | 2011-07-29 | 2011-07-29 | Wind-force squirrel-cage influence generator with low voltage crossing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103874851B (en) |
| WO (1) | WO2013019173A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016103968A (en) * | 2014-10-21 | 2016-06-02 | ゼネラル・エレクトリック・カンパニイ | Induction generator system with grid-loss ride-through capability |
| IT201600096849A1 (en) * | 2016-09-28 | 2018-03-28 | D&M Holding S P A | ELECTRICITY GENERATION SYSTEM IN THE ISLAND FOR THE SUPPLY OF AN EXTERNAL LOAD |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1784823A (en) * | 2003-05-02 | 2006-06-07 | 克桑特雷克斯技术有限公司 | Control system for doubly fed induction generator |
| CN101989829A (en) * | 2010-09-19 | 2011-03-23 | 浙江运达风电股份有限公司 | Low voltage ride through (LVRT) control system of fixed-blade stalling type wind generating set |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008067452A (en) * | 2006-09-05 | 2008-03-21 | Univ Of Ryukyus | System paralleling device of induction generator |
| US8120932B2 (en) * | 2008-07-01 | 2012-02-21 | American Superconductor Corporation | Low voltage ride through |
-
2011
- 2011-07-29 WO PCT/US2011/045825 patent/WO2013019173A1/en active Application Filing
- 2011-07-29 CN CN201180072549.6A patent/CN103874851B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1784823A (en) * | 2003-05-02 | 2006-06-07 | 克桑特雷克斯技术有限公司 | Control system for doubly fed induction generator |
| CN101989829A (en) * | 2010-09-19 | 2011-03-23 | 浙江运达风电股份有限公司 | Low voltage ride through (LVRT) control system of fixed-blade stalling type wind generating set |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013019173A1 (en) | 2013-02-07 |
| CN103874851A (en) | 2014-06-18 |
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Granted publication date: 20180209 Termination date: 20200729 |