CN108258731A - A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy - Google Patents
A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy Download PDFInfo
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- CN108258731A CN108258731A CN201810203228.9A CN201810203228A CN108258731A CN 108258731 A CN108258731 A CN 108258731A CN 201810203228 A CN201810203228 A CN 201810203228A CN 108258731 A CN108258731 A CN 108258731A
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- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 9
- 238000004804 winding Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
Abstract
The present invention discloses a kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy, chopper, motor side converter and power grid side converter including brushless dual-feedback wind power generator, with superconducting coil；The output terminal of brushless dual-feedback wind power generator is connected to the grid after motor side converter, motor side grid side, power grid side converter and transformer successively；Superconducting coil is made of superconducting magnet, and the intermediate link as system stored energy is connect by chopper with motor side converter and grid side unsteady flow respectively；Certain active or reactive power compensation is carried out to power grid voltage fluctuation and flickering caused by wind speed changes using the high-energy density and fast response characteristic of super conductive magnetic storage energy.The present invention improves the grid-connected stability of wind generator system, effective to reduce the cost consumption brought by grid stability and machinery check and repair, had not only reduced maintenance cost but also had protected environment.
Description
Technical field
The present invention relates to technical field of wind power generation, specially a kind of new-type brushless double feed wind-force with super conductive magnetic storage energy
Electricity generation system.
Background technology
It is well known that wind energy is a kind of clean reproducible energy.China has a vast territory, and seashore line length, wind energy resources compare
Abundant, particularly with for extreme wind speed area, the ground such as northeast, North China, northwest, the Inner Mongol enrich southeastern coast one for wind energy resources
Area.In these places, all distributions establish large-scale wind power field, it is contemplated that the wind turbine total installation of generating capacity to the year two thousand twenty whole nation can
Reach 8,000 ten thousand to one hundred million kilowatts, 6% electricity needs is provided for China, although the uncertainty in global power market, China
Propose the strong support policy to the regenerative resource based on wind-powered electricity generation, it is anticipated that following wind-powered electricity generation is certain in energy resource system
Play very important role.
As the wind-driven generator of wind generator system key technology, BDFM（brushless doubly-fed
Machine brushless dual-feed motors）Birth promote the development of wind generating technology.BDFM is due to that can realize self-starting, different
The electric operations modes such as step, synchronous and double-fed, and speed changing and constant frequency alternating current generator can be used as, and brushless reliable, in great Rong
It has broad application prospects in the electric drive system and wind generator system of amount, thus causes the extensive of domestic and foreign scholars
Concern.The theoretical research comparative maturity of BDFM at present, has basically formed electric machine theory system.Although the high-power change of present mainstream
Fast constant-frequency wind turbine generator is DFIG（Double fed induction generator doubly fed induction generators）, but DFIG is protected
Brush and slip ring have been stayed, a large amount of check fees that brush and slip ring wear problem are carried out because dismantling wind turbine, repair will be spent every year
Take, the expenses such as labour cost.BDFM eliminates brush and slip ring, just compensates for this shortcoming of DFIG, and the speed change based on BDFM
Constant frequency operate in it is extremely similar to DFIG on general frame, on BDFM stators embedded with different numbers of poles power winding and control around
Group, the power winding of BDFM is directly connected with power grid transmits most of power, is equivalent to the stator winding of DFIG；Control winding is led to
It crosses back-to-back type current transformer and is connected with power grid and transmit a small amount of slip power, be equivalent to the rotor windings of DFIG.Power winding because
It is connected directly with power grid so power frequency is remained unchanged as 50Hz, so only need to be by the power frequency of adjusting control winding just
The variable speed constant frequency of BDFM can be kept to run.
For super conductive magnetic storage energy compared with other stored energy forms, energy storage density is high, fast response time and lossless, energy storage efficiency
Up to 95%.Thus, the most important application of super conductive magnetic storage energy is exactly that the stability of electric system is adjusted, particularly wind speed variation frequency
The big wind-powered electricity generation micro-grid system of rate, it can flexible modulation superconducting magnet and ambient systems Power Exchange, be actively engaged in system
Dynamic property is adjusted, and adjusting control policy independence carries out, and the control strategy of ambient systems is not had an impact.
Invention content
In view of the above-mentioned problems, the grid-connected stabilization of wind generator system can be improved the purpose of the present invention is to provide a kind of
Property, reduce the new-type brushless double feed wind-force with super conductive magnetic storage energy because of the cost consumption that grid stability and machinery check and repair are brought
Electricity generation system.Technical solution is as follows：
A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy, including brushless dual-feedback wind power generator, has
Chopper, motor side converter and the power grid side converter of superconducting coil；
The output terminal of brushless dual-feedback wind power generator successively through motor side converter, motor side grid side, power grid side converter and
It is connected to the grid after transformer；
Superconducting coil is made of superconducting magnet, as system stored energy intermediate link by chopper respectively with motor side unsteady flow
Device is connected with grid side unsteady flow；
By controlling the switch of power grid side converter, by the AC energy of power grid using grid side unsteady flow after transformer pressure-reducing
The reversion reaction of device is converted into direct current energy and is stored in superconducting coil；
When wind speed variation range and all very big frequency, the variable speed constant frequency operation of brushless dual-feedback wind power generator, to support power grid
Voltage fluctuation；When there is flickering in network voltage, superconducting coil by the way that chopper is controlled to magnetize and put magnetic to superconducting coil,
The Power Exchange between superconducting coil and motor side converter and grid side AC side of converter is realized, so as to smooth wind power unit
It is incorporated into the power networks.
The beneficial effects of the invention are as follows：The present invention is in the intensive place of wind energy resources, using super conductive magnetic storage energy to power grid system
The power back-off ability of system in addition the brushless dual-feedback wind power generator of variable speed constant frequency operation saves the advantage of brush and slip ring, carries
The high grid-connected stability of wind generator system, and can effectively reduce because the expense that grid stability and machinery check and repair are brought disappears
Consumption, had not only reduced maintenance cost but also had protected environment.
Description of the drawings
Fig. 1 is the brushless double feed wind generator system principle schematic diagram of based superconductive magnetic storage energy.
Fig. 2 is the main circuit diagram of the brushless double feed wind generator system of based superconductive magnetic storage energy.
Fig. 3 is super conductive magnetic storage energy voltage converter（VCS）Basic circuit topological diagram.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.The present embodiment is stored up with superconducting magnetic
The new-type brushless double feed wind generator system of energy, chopper, motor including brushless dual-feedback wind power generator, with superconducting coil
Side converter and power grid side converter；The output terminal of brushless dual-feedback wind power generator is successively through motor side converter, motor side electricity
It is connected to the grid after net side, power grid side converter and transformer；Superconducting coil is made of superconducting magnet, as in system stored energy
Between link connect respectively with motor side converter and grid side unsteady flow by chopper；By controlling opening for power grid side converter
It closes, the AC energy of power grid is converted into direct current energy using the reversion reaction of power grid side converter after transformer pressure-reducing and is deposited
Storage is in superconducting coil；When wind speed variation range and all very big frequency, the variable speed constant frequency operation of brushless dual-feedback wind power generator,
To support the voltage fluctuation of power grid；When flickering occurs in network voltage, superconducting coil is by controlling chopper to superconducting coil
Magnetic is magnetized and put, realizes the Power Exchange between superconducting coil and motor side converter and grid side AC side of converter, so as to
Smooth wind power set grid-connection is run.
As shown in Figure 1, the brushless double feed wind generator system principle schematic diagram for based superconductive magnetic storage energy, mainly by
The chopper composition that blade, BDFM, motor side converter, power grid side converter, power grid, superconducting coil are formed.The speed change of BDFM
Constant frequency is run and the mutual cooperation of super conductive magnetic storage energy fast throughput power, under certain control strategy, the two common guarantee
The stable operation of system, makes no matter wind turbine can be operated on optimum speed under which kind of wind speed environments, due to super conductive magnetic storage energy
It can inhibit because of the overcurrent of electric network fault motor side AC side of converter, the voltage value constant of guarantee capacitor DC side improves
The uninterrupted operation ability of power grid, has ensured the power quality of residential electricity consumption.
Using the high-energy density and fast response characteristic of super conductive magnetic storage energy to power grid voltage wave caused by wind speed changes
Dynamic and flickering carries out certain active or reactive power compensation, the stability of system is improved, using the following method of operation：
Superconducting coil is mainly made of superconducting magnet, it will be appreciated that, ideal inductance element that internal resistance be zero very big for inductance, its conduct
The intermediate link of system stored energy is connected by chopper with motor side converter and grid side unsteady flow respectively.By controlling grid side
The AC energy of power grid is converted into directly by the switch of current transformer through transformer pressure-reducing using the reversion reaction of power grid side converter
Galvanic electricity can be stored in superconducting coil.
Fig. 2 show the main circuit diagram of the brushless double feed wind generator system of based superconductive magnetic storage energy, explicitly describes
The connection mode that super conductive magnetic storage energy is connected to the grid, it is seen that superconducting coil need to be by connecting as the intermediate link of system with chopper
It could coordinate to carry out exchanging for active power and reactive power with current transformer and system.
Fig. 3 is super conductive magnetic storage energy voltage converter（VCS）Basic circuit topological diagram, for the main circuit of Fig. 2
The chopper that power grid, power grid side converter, superconducting coil are formed can be equivalent to a voltage converter by figure
The converter device of (VoltageSourceConverter, VSC) and chopper (Chopper) composition, superconducting coil are used
In storage energy by control chopper magnetize and put magnetic to extraneous energy exchange.
Since the inductance of superconducting coil is very big, curent change is small, it is possible to understand that superconducting coil is equivalent to access system in parallel
Controllable constant-current source, and DC bus capacitor, chopper, superconducting coil together form the friendship of back-to-back type current transformer composition-straight-
The source of stable pressure of ac frequency converter intermediate dc side.When wind speed variation range and all very big frequency, brushless dual-feedback wind power generator
Variable speed constant frequency is run, and has certain supporting role to the voltage fluctuation of power grid, but can cause electric network voltage flicker, at this moment,
Superconducting coil is rapidly performed by superconducting coil and motor side converter by the way that chopper is controlled to magnetize and put magnetic to superconducting coil
Power Exchange between grid side AC side of converter, so as to smooth wind power set grid-connection run, effectively improve because with
The power quality problem of grid-connected place's voltage fluctuation institute band caused by machine wind speed.
Claims (1)
1. a kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy, which is characterized in that including brushless double feed wind
Power generator, chopper, motor side converter and the power grid side converter with superconducting coil；
The output terminal of brushless dual-feedback wind power generator successively through motor side converter, motor side grid side, power grid side converter and
It is connected to the grid after transformer；
Superconducting coil is made of superconducting magnet, as system stored energy intermediate link by chopper respectively with motor side unsteady flow
Device is connected with grid side unsteady flow；
By controlling the switch of power grid side converter, by the AC energy of power grid using grid side unsteady flow after transformer pressure-reducing
The reversion reaction of device is converted into direct current energy and is stored in superconducting coil；
When wind speed variation range and all very big frequency, the variable speed constant frequency operation of brushless dual-feedback wind power generator, to support power grid
Voltage fluctuation；When there is flickering in network voltage, superconducting coil by the way that chopper is controlled to magnetize and put magnetic to superconducting coil,
The Power Exchange between superconducting coil and motor side converter and grid side AC side of converter is realized, so as to smooth wind power unit
It is incorporated into the power networks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810203228.9A CN108258731A (en) | 2018-03-13 | 2018-03-13 | A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810203228.9A CN108258731A (en) | 2018-03-13 | 2018-03-13 | A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy |
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| Publication Number | Publication Date |
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| CN108258731A true CN108258731A (en) | 2018-07-06 |
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| CN201810203228.9A Pending CN108258731A (en) | 2018-03-13 | 2018-03-13 | A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564162A (en) * | 2020-11-23 | 2021-03-26 | 合肥工业大学 | Double-fed generator converter circuit integrated with energy storage unit and control method |
| CN112632851A (en) * | 2020-12-14 | 2021-04-09 | 中国船舶重工集团海装风电股份有限公司 | Analysis method for evaluating influence of tower barrel change on flickering of wind turbine generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564162A (en) * | 2020-11-23 | 2021-03-26 | 合肥工业大学 | Double-fed generator converter circuit integrated with energy storage unit and control method |
| CN112564162B (en) * | 2020-11-23 | 2022-09-16 | 合肥工业大学 | Double-fed generator converter circuit integrated with energy storage unit and control method |
| CN112632851A (en) * | 2020-12-14 | 2021-04-09 | 中国船舶重工集团海装风电股份有限公司 | Analysis method for evaluating influence of tower barrel change on flickering of wind turbine generator |
| CN112632851B (en) * | 2020-12-14 | 2022-05-03 | 中国船舶重工集团海装风电股份有限公司 | Analysis method for evaluating influence of tower barrel change on flickering of wind turbine generator |
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Application publication date: 20180706 |
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