CN105552966A - Energy-storage direct-drive permanent magnet wind power generation system - Google Patents
Energy-storage direct-drive permanent magnet wind power generation system Download PDFInfo
- Publication number
- CN105552966A CN105552966A CN201610094127.3A CN201610094127A CN105552966A CN 105552966 A CN105552966 A CN 105552966A CN 201610094127 A CN201610094127 A CN 201610094127A CN 105552966 A CN105552966 A CN 105552966A
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- China
- Prior art keywords
- energy storage
- permanent magnet
- storage device
- pwm converter
- energy
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- 238000004146 energy storage Methods 0.000 title claims abstract description 46
- 238000010248 power generation Methods 0.000 title abstract description 3
- 239000003990 capacitor Substances 0.000 claims abstract description 33
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000035772 mutation Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract 5
- 230000001360 synchronised effect Effects 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
Abstract
The invention discloses an energy-storage direct-drive permanent magnet wind power generation system, which comprises a wind turbine, a permanent magnet synchronous generator, a back-to-back dual PWM converter, an energy storage device, a grid-connected transformer and a control system, wherein the grid-connected transformer is connected with the back-to-back dual PWM converter; the back-to-back dual PWM converter is connected with the permanent magnet synchronous generator; the permanent magnet synchronous generator is connected with the wind turbine; the back-to-back dual PWM converter is connected with the energy storage device; the energy storage device and the back-to-back dual PWM converter are connected with the control system respectively; and the energy storage device is a hybrid energy storage device comprising a super capacitor and a lithium battery, so that the targets of improving the grid-connected power quality and stability, maintaining a direct current capacitor voltage and controlling and considering power quality management and energy management during operation of a fan are achieved.
Description
Technical field
Patent of the present invention relates to wind generating technology and energy storage technology, is specifically related to a kind of directly-drive permanent magnet wind generating system with energy storage.
Background technology
Wind power generation is the effective way utilizing new forms of energy, and wind energy has the characteristic of change at random, and the power output of wind-driven generator, usually along with wind speed significantly Rapid Variable Design, can have an impact to the electrical network quality of power supply and grid stability.
Direct-drive permanent magnet wind power generator is connected with electrical network by a two PWM converter, and its stator voltage is not by the constraint of line voltage, and stator current is then subject to the control of pusher side current transformer.The convert alternating current that generator sends by pusher side current transformer becomes direct current, and controls the power output of generator, realizes optimal wind energy and catches; Direct current energy is reverse into and electrical network same frequency, of ac with amplitude by net side converter, and controls the power factor of grid-connected electric energy and the stable of DC voltage.
But because the power output of Wind turbines mainly affects by many-sides such as wind speed, air pressure, temperature, can often fluctuate, in the process of being incorporated into the power networks, the random fluctuation of its power output will bring the problems such as electric power system medium frequency instability, voltage flicker, in addition, when being incorporated into the power networks, when generation external fault causes power cannot be transferred out by net side converter, DC capacitor voltage can be made to raise, jeopardize equipment; When from network operation, the dynamic power that the power of fluctuation can affect generating equipment and power consumption equipment balances, and affects the stable operation of wind generator system, and in addition, DC capacitor voltage keeps stable and also needs certain measure.
At present, DC side bleeder circuit partly can solve DC capacitor voltage and cross the problems such as high excessively, but effect is general; Adopt energy storage device can solve power fluctuation problem, but existing design is all that energy storage device is independent, namely energy storage device is connected to wind power equipment power stage port by energy conversion (PCS), power fluctuation is compensated, energy storage device and wind generator system current transformer are divided into relatively independent system and control by this method, not by the unified regulation and control of original wind generator system controller, reduce the reliability of control.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes accumulation energy type directly-drive permanent magnet wind generating system, improve to reach and network electric energy quality and stability, maintenance DC capacitor voltage, be convenient to the object of Power quality management when controlling and take into account fan operation and energy management.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of accumulation energy type directly-drive permanent magnet wind generating system, include wind turbine, magneto alternator, two PWM converter back-to-back, energy storage device, grid-connected transformer and control system, described grid-connected transformer is connected with described two PWM converter back-to-back, described two PWM converter is back-to-back connected with magneto alternator, described magneto alternator is connected with described wind turbine, described two PWM converter back-to-back realizes being connected with described energy storage device, and described energy storage device realizes being connected with described control system with described two PWM converter back-to-back respectively, described energy storage device is the hybrid accumulator be made up of super capacitor and lithium battery.
As preferably, described two PWM converter back-to-back includes pusher side current transformer and net side converter, described pusher side current transformer and described magneto alternator realize being connected, described net side converter realizes being connected with described grid-connected transformer, described pusher side current transformer and described net side converter share DC side, and described energy storage device is connected with described DC side.
As preferably, described super capacitor and lithium battery in parallel, and described super capacitor and lithium battery carry out DC/DC conversion by buck-boost chopper circuit.
As preferably, described control system comprises by the first controller, second controller and energy storage controller, described first controller is connected with described pusher side current transformer, described second controller is connected with described net side converter, and described energy storage controller realizes being connected with described super capacitor and lithium battery respectively.
As preferably, described super capacitor is used for the high frequency wind power output change that wind speed mutation causes, and described lithium battery is for compensating relatively mild low frequency wind power output fluctuation.
Pass through technique scheme, the present invention is by being installed on fan converter DC side by energy-storage system, reduce the power fluctuation caused because of wind energy change, the control system of direct wind-driven generator and the control system of energy storage section are integrated, comprehensive coordination controls, have employed the hybrid energy-storing mode that super capacitor and lithium battery coordinate, reach and improve and network electric energy quality and stability, maintenance DC capacitor voltage, be convenient to the object of Power quality management when controlling and take into account fan operation and energy management.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
The system schematic of Fig. 1 accumulation energy type directly-drive permanent magnet wind generating system disclosed in the embodiment of the present invention;
The system schematic of Fig. 2 energy storage device of accumulation energy type directly-drive permanent magnet wind generating system disclosed in the embodiment of the present invention.
The title of numeral and the corresponding component represented by letter in figure:
1. wind turbine 2. magneto alternator 3. two PWM converter 31. pusher side current transformer back-to-back
The grid-connected transformer of 32. net side converter 4. energy storage device 41. super capacitor 42. lithium battery 5.
6. control system 61. first controller 62. second controller 63. energy storage controller
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
The invention provides accumulation energy type directly-drive permanent magnet wind generating system, its operation principle is by energy-storage system is installed on fan converter DC side, reduce the power fluctuation caused because of wind energy change, the control system of direct wind-driven generator and the control system of energy storage section are integrated, comprehensive coordination controls, have employed the hybrid energy-storing mode that super capacitor and lithium battery coordinate, reach and improve and network electric energy quality and stability, maintenance DC capacitor voltage, be convenient to the object of Power quality management when controlling and take into account fan operation and energy management.
Below in conjunction with embodiment and embodiment, the present invention is further detailed explanation.
As depicted in figs. 1 and 2, a kind of accumulation energy type directly-drive permanent magnet wind generating system, include wind turbine 1, magneto alternator 2, two PWM converter 3 back-to-back, energy storage device 4, grid-connected transformer 5 and control system 6, described grid-connected transformer 5 is connected with described two PWM converter 3 back-to-back, described two PWM converter 3 is back-to-back connected with magneto alternator 2, described magneto alternator is connected with described wind turbine 1, described two PWM converter 3 is back-to-back connected with described energy storage device 4, described two PWM converter 4 back-to-back realizes being connected with described control system 6 with described two PWM converter 3 back-to-back respectively, described energy storage device 4 is the hybrid accumulator be made up of super capacitor 41 and lithium battery 42.
It should be noted that, described two PWM converter 3 back-to-back includes pusher side current transformer 31 and net side converter 32, described pusher side current transformer 31 realizes being connected with described magneto alternator 2, described net side converter 32 realizes being connected with described grid-connected transformer 5, described pusher side current transformer 31 shares DC side with described net side converter 32, and described energy storage device is connected with described DC side.
It should be noted that described super capacitor and lithium battery parallel connection, and described super capacitor and lithium battery carry out DC/DC conversion by buck-boost chopper circuit circuit.
It should be noted that, described control system 6 comprises by the first controller 61, second controller 62 and energy storage controller 63, described first controller 61 is connected with described pusher side current transformer 31, described second controller 62 is connected with described net side converter 32, and described energy storage controller 63 realizes being connected with described super capacitor and lithium battery respectively.
It should be noted that the high frequency wind power output change that described super capacitor causes for wind speed mutation, described lithium battery is for compensating relatively mild low frequency wind power output fluctuation.
Concrete use step of the present invention is as follows: more as depicted in figs. 1 and 2, grid side converter is connected with energy storage device, control wind generator system under the pattern of being incorporated into the power networks, active participate operation and control of electric power system, active power and reactive power compensation are provided, suppress power fluctuation, improve the quality of power supply; Control wind generator system under network operation pattern, reach the dynamic equilibrium effect of Generation Side and electricity consumption load-side active power and reactive power, improve the quality of power supply, make electricity generation system and the safe and effective operation of load.Thus solve the DC side overvoltage problem occurred in direct-drive permanent magnet wind power generator low voltage crossing process; Energy storage device have employed the hybrid energy-storing mode of super capacitor and lithium battery cooperation simultaneously, make full use of super capacitor and lithium battery in the charging interval, difference in discharge and recharge frequency and respective advantage are carried out, Power quality management during to take into account fan operation and energy management.
When power of fan is greater than required power output, if energy storage section residual capacity (SOC) is not enough, DC bus by power inverter to super capacitor and lithium cell charging, when power of fan is less than required power output, if energy storage section residual capacity is normal, then super capacitor and lithium battery electric discharge, with makeup energy insufficient section, at DC bus-bar voltage generation short interruptions and when falling, super capacitor and lithium battery release energy to maintain DC bus-bar voltage in normal range (NR) by power inverter, ensure the normal work of system.
By above mode, accumulation energy type directly-drive permanent magnet wind generating system provided by the present invention, by energy-storage system is installed on fan converter DC side, reduce the power fluctuation caused because of wind energy change, the control system of direct wind-driven generator and the control system of energy storage section are integrated, comprehensive coordination controls, have employed the hybrid energy-storing mode that super capacitor and lithium battery coordinate, reach and improve and network electric energy quality and stability, maintenance DC capacitor voltage, be convenient to the object of Power quality management when controlling and take into account fan operation and energy management.
Above-described is only the preferred implementation of accumulation energy type directly-drive permanent magnet wind generating system disclosed in this invention; should be understood that; for the person of ordinary skill of the art; without departing from the concept of the premise of the invention; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (5)
1. an accumulation energy type directly-drive permanent magnet wind generating system, it is characterized in that, include wind turbine, magneto alternator, two PWM converter back-to-back, energy storage device, grid-connected transformer and control system, described grid-connected transformer is connected with described two PWM converter back-to-back, described two PWM converter is back-to-back connected with magneto alternator, described magneto alternator is connected with described wind turbine, described two PWM converter back-to-back realizes being connected with described energy storage device, and described energy storage device realizes being connected with described control system with described two PWM converter back-to-back respectively, described energy storage device is the hybrid accumulator be made up of super capacitor and lithium battery.
2. accumulation energy type directly-drive permanent magnet wind generating system according to claim 1, it is characterized in that, described two PWM converter back-to-back includes pusher side current transformer and net side converter, described pusher side current transformer and described magneto alternator realize being connected, described net side converter realizes being connected with described grid-connected transformer, described pusher side current transformer and described net side converter share DC side, and described energy storage device is connected with described DC side.
3. accumulation energy type directly-drive permanent magnet wind generating system according to claim 1, is characterized in that, described super capacitor and lithium battery parallel connection, and described super capacitor and lithium battery carry out DC/DC conversion by buck-boost chopper circuit.
4. accumulation energy type directly-drive permanent magnet wind generating system according to claim 2, it is characterized in that, described control system comprises by the first controller, second controller and energy storage controller, described first controller is connected with described pusher side current transformer, described second controller is connected with described net side converter, and described energy storage controller realizes being connected with described super capacitor and lithium battery respectively.
5. accumulation energy type directly-drive permanent magnet wind generating system according to claim 1, is characterized in that, described super capacitor is used for the high frequency wind power output change that wind speed mutation causes, and described lithium battery is for compensating relatively mild low frequency wind power output fluctuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094127.3A CN105552966A (en) | 2016-02-22 | 2016-02-22 | Energy-storage direct-drive permanent magnet wind power generation system |
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| CN201610094127.3A CN105552966A (en) | 2016-02-22 | 2016-02-22 | Energy-storage direct-drive permanent magnet wind power generation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972796A (en) * | 2017-05-15 | 2017-07-21 | 上海电机学院 | A kind of wind-power electricity generation analog simulation platform |
| CN110071531A (en) * | 2019-05-22 | 2019-07-30 | 东北大学 | A kind of extensive energy storage and permanent magnet wind generating coordinated control system and method |
| CN111207039A (en) * | 2020-02-24 | 2020-05-29 | 沈阳永磁电机制造有限公司 | Pure square wave permanent magnet wind-collecting type wind power generation system |
| CN112366748A (en) * | 2020-10-29 | 2021-02-12 | 阳光电源股份有限公司 | Wind storage combined wind power converter and control method thereof |
| CN112636384A (en) * | 2019-10-08 | 2021-04-09 | 维谛技术有限公司 | Wind power generation system, grid-connected control method and device |
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| CN102957167A (en) * | 2012-11-06 | 2013-03-06 | 郭高朋 | Modularized multi-level converter-based wind power generation and grid connection system |
| CN104578148A (en) * | 2014-12-23 | 2015-04-29 | 许昌学院 | Permanent magnetic direct drive type wind power system mode switching control method |
| CN104682411A (en) * | 2015-03-27 | 2015-06-03 | 许昌学院 | Hybrid energy storage system structure of permanent magnet direct drive type wind power system and control method |
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2016
- 2016-02-22 CN CN201610094127.3A patent/CN105552966A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101214442B1 (en) * | 2011-02-15 | 2012-12-21 | 한국전기연구원 | Electronic Active Load |
| CN102957167A (en) * | 2012-11-06 | 2013-03-06 | 郭高朋 | Modularized multi-level converter-based wind power generation and grid connection system |
| CN104578148A (en) * | 2014-12-23 | 2015-04-29 | 许昌学院 | Permanent magnetic direct drive type wind power system mode switching control method |
| CN104682411A (en) * | 2015-03-27 | 2015-06-03 | 许昌学院 | Hybrid energy storage system structure of permanent magnet direct drive type wind power system and control method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972796A (en) * | 2017-05-15 | 2017-07-21 | 上海电机学院 | A kind of wind-power electricity generation analog simulation platform |
| CN110071531A (en) * | 2019-05-22 | 2019-07-30 | 东北大学 | A kind of extensive energy storage and permanent magnet wind generating coordinated control system and method |
| CN110071531B (en) * | 2019-05-22 | 2023-03-31 | 东北大学 | Large-scale energy storage and permanent magnet wind power generation coordinated control system and method |
| CN112636384A (en) * | 2019-10-08 | 2021-04-09 | 维谛技术有限公司 | Wind power generation system, grid-connected control method and device |
| CN111207039A (en) * | 2020-02-24 | 2020-05-29 | 沈阳永磁电机制造有限公司 | Pure square wave permanent magnet wind-collecting type wind power generation system |
| CN112366748A (en) * | 2020-10-29 | 2021-02-12 | 阳光电源股份有限公司 | Wind storage combined wind power converter and control method thereof |
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Application publication date: 20160504 |