WO2012009478A1 - Hydraulic wind power storage and electrical energy generation system - Google Patents
Hydraulic wind power storage and electrical energy generation system Download PDFInfo
- Publication number
- WO2012009478A1 WO2012009478A1 PCT/US2011/043916 US2011043916W WO2012009478A1 WO 2012009478 A1 WO2012009478 A1 WO 2012009478A1 US 2011043916 W US2011043916 W US 2011043916W WO 2012009478 A1 WO2012009478 A1 WO 2012009478A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- generation system
- electrical energy
- power storage
- energy generation
- wind power
- Prior art date
Links
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
- F03D9/28—Wind motors characterised by the driven apparatus the apparatus being a pump or a compressor
-
- 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
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/17—Combinations of wind motors with apparatus storing energy storing energy in pressurised fluids
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/406—Transmission of power through hydraulic systems
-
- 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Definitions
- a system is disclosed to harness the kinetic energy of the wind by use of wind turbines attached to a closed loop hydraulic storage system.
- alternator/generator through a speed increasing transmission. Because a wind turbine may turn up to about 60 rpm in a steady wind of 20 mph, but typical generators requires a constant input shaft speed of about 1200 to 1800 rpm, depending on the type of generator, to produce quality power. Accordingly, it has been known to provide variable speed generators.
- variable speed generator the power output of a variable speed generator must be conditioned before it can be fed into a power grid.
- FIG. 1 is a schematic of an exemplary wind turbine hydraulic power generation system
- FIG. 2 is a schematic of a hydraulic system control for use in a wind turbine hydraulic power generation system of FIG. 1;
- FIG. 3 is a schematic of an exemplary wind turbine integrated pole and tank design.
- FIG. 1 is a schematic of an exemplary wind turbine hydraulic power generation system 10.
- System 10 includes at least one wind turbine 12 that is operatively connected to a hydraulic pump 14.
- a plurality of wind turbines 12 are provided, with each wind turbine 12 being provided with a hydraulic pump 14.
- Hydraulic pump 14 is operatively connected to a pressurized holding tank 16.
- a hydraulic motor 18 is operatively connected to the pressurized holding tank 16.
- a power generator 20 is connected to hydraulic motor 18.
- a non-pressurized return tank 22 is also included.
- system 10 includes a plurality of wind turbines 12 that are mounted on shafts 24, and each shaft is connected to an individual hydraulic pump 14. As wind causes vanes 26 of wind turbines 12 to turn, this action causes shafts 24 to rotate. The shaft rotation turns hydraulic pumps 14 resulting in delivery of pressurized fluid to holding tank 16.
- Pressurized holding tank 16 contains compressed air and hydraulic fluid.
- pressurized holding tank utilizes water with a biodegradable glycol as a hydraulic fluid.
- system 10 may further comprise a UV light to control bacterial growth within tanks 16 and 22.
- Pressurizing holding tank 16 is configured to release the collected pressure generated by hydraulic pumps 14 at a steady rate to hydraulic motor 18. Because the pressure is released from holding tank 16 at a steady state, variations of wind speed have little, to any, effect on power generation. Hydraulic motor 18, in turn, drives an electrical power generator 20. Power generator 20 provides an electrical output which can then be processed for connection to any suitable power grid. Unpressurized fluid is then returned to pumps 14 via suitable conduits 28 to complete a closed circuit.
- a pressurized portion of the fluid loop 50 in system 10 may be seen, including an exemplary arrangement of flow control logic. More specifically, to operate a 1 kW hydraulic motor 18, pumps 14 direct compressed air to pressurized holding tank 16 along a fluid line 52. In one exemplary arrangement, pumps 14 direct the compressed air along a common fluid line 52, as shown. There are two exit ports 54, 56 from pressurized holding tank 16. The exit ports 54, 56 are fluidly connected to a flow control regulator 58, which, in turn, is connected to motor 18. [0019] Disposed within the flow paths of the exit ports are check valves 60. In the exemplary arrangement disclosed, check valves 60 are 100 psi pilot operated check valves designed to permit pressurized fluid to operate motor 18. However, to prevent a blow out, fluid loop 50 may also include 145 psi Pilot operated check valves 62. A 5 psi check valve 64 may also be provided to prevent reverse blow back in fluid loop 50.
- System 10 advantageously requires low maintenance and allows storage of energy for selective and steady, controlled release of energy, regardless of wind speeds. Further, unlike systems that employ air compressors, system 10 is quiet.
- FIG. 3 An alternative exemplary arrangement of a storage and generation system 100 is shown in FIG. 3.
- Storage and generation system 100 is disposed in a stacked manner, with a pressurized holding tank 102 being disposed beneath a non pressurized return tank 104.
- tanks 102 and 104 may be concealed within a hollow tube or tower member.
- Wind turbines 106 are arranged along a common axial shaft 108 and shaft is operatively connected to a hydraulic pump (not shown) which is fluidly connected to pressurized holding tank 102. Similar to the previously described embodiment, a hydraulic motor 110 receives pressurized fluid from pressurized holding tank 102 at a predetermined and controlled rate. Hydraulic motor 110 is operatively connected to an electrical power generator 112. Unpressurized fluid is then returned to non-pressurized return tank 144.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
A wind power storage and electrical energy generation system is disclosed. The system includes at least one wind turbine; a hydraulic pump operatively connected to each wind turbine; a pressurized holding tank; a hydraulic motor; a power generator; and a non- pressurized return tank.
Description
HYDRAULIC WIND POWER STORAGE AND ELECTRICAL
ENERGY GENERATION SYSTEM
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to U.S. Provisional Patent Application No.:
61/363,493 filed July 13, 2010, the disclosures of which are incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] A system is disclosed to harness the kinetic energy of the wind by use of wind turbines attached to a closed loop hydraulic storage system.
BACKGROUND
[0003] Energy demands are increasing, while the world's oil and fossil fuels production capabilities are declining. Accordingly, attention is being increasingly drawn to renewable energy resources such as solar power and wind turbines. While wind turbines have been in use for some time, with the increasing interest in renewable energy, wind turbine generators are being built in increasingly large numbers and in larger power generation sizes.
[0004] However, a limitation of current wind turbine generators is that current technology limits the ability to harness, store and steadily transform wind energy into useable electric power. Indeed, the inherent variability of wind speeds can severely damage the performance of wind turbines that have a direct drive alternator system.
[0005] In some prior art systems, a wind turbine is connected to an
alternator/generator through a speed increasing transmission. Because a wind turbine may turn up to about 60 rpm in a steady wind of 20 mph, but typical generators requires a constant input shaft speed of about 1200 to 1800 rpm, depending on the type of generator, to produce quality power. Accordingly, it has been known to provide variable speed generators.
However, the power output of a variable speed generator must be conditioned before it can be fed into a power grid.
[0006] It is also known to use an open loop hydraulic system in place of mechanical transmissions. However, conventional hydraulic pumps require input speed of a minimum of
about 300 to 500 rpm to produce usable hydraulic pressure. Accordingly, open loop hydraulic systems require a mechanical speed increaser disposed between the wind turbine and the hydraulic pump, complicating the system and leading to increased likelihood of mechanical breakdown.
[0007] Therefore, there remains a need for a wind turbine generation system that is designed to harness the kinetic energy of the wind, store the energy and to release the stored energy at a steady rate.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Some configurations of the storage and energy generation system will now be described, by way of example only and without disclaimer of other configurations, with reference to the accompanying drawings, in which:
[0009] FIG. 1 is a schematic of an exemplary wind turbine hydraulic power generation system;
[0010] FIG. 2 is a schematic of a hydraulic system control for use in a wind turbine hydraulic power generation system of FIG. 1; and
[0011] FIG. 3 is a schematic of an exemplary wind turbine integrated pole and tank design.
DETAILED DESCRIPTION
[0012] Referring now to the drawings, exemplary storage and energy generation systems are shown in detail. Although the drawings represent alternative configurations of storage and energy generation system, the drawings are not necessarily to scale and certain features may be exaggerated to provide a better illustration and explanation of a configuration. The configurations set forth herein are not intended to be exhaustive or to otherwise limit the device to the precise forms disclosed in the following detailed description.
[0013] FIG. 1 is a schematic of an exemplary wind turbine hydraulic power generation system 10. System 10 includes at least one wind turbine 12 that is operatively connected to a hydraulic pump 14. In one exemplary arrangement, a plurality of wind
turbines 12 are provided, with each wind turbine 12 being provided with a hydraulic pump 14.
[0014] Hydraulic pump 14 is operatively connected to a pressurized holding tank 16.
A hydraulic motor 18 is operatively connected to the pressurized holding tank 16. A power generator 20 is connected to hydraulic motor 18. A non-pressurized return tank 22 is also included.
[0015] In one configuration, system 10 includes a plurality of wind turbines 12 that are mounted on shafts 24, and each shaft is connected to an individual hydraulic pump 14. As wind causes vanes 26 of wind turbines 12 to turn, this action causes shafts 24 to rotate. The shaft rotation turns hydraulic pumps 14 resulting in delivery of pressurized fluid to holding tank 16.
[0016] Pressurized holding tank 16 contains compressed air and hydraulic fluid. In one exemplary arrangement, pressurized holding tank utilizes water with a biodegradable glycol as a hydraulic fluid. In addition, system 10 may further comprise a UV light to control bacterial growth within tanks 16 and 22.
[0017] Pressurizing holding tank 16 is configured to release the collected pressure generated by hydraulic pumps 14 at a steady rate to hydraulic motor 18. Because the pressure is released from holding tank 16 at a steady state, variations of wind speed have little, to any, effect on power generation. Hydraulic motor 18, in turn, drives an electrical power generator 20. Power generator 20 provides an electrical output which can then be processed for connection to any suitable power grid. Unpressurized fluid is then returned to pumps 14 via suitable conduits 28 to complete a closed circuit.
[0018] Referring to FIG. 2, a pressurized portion of the fluid loop 50 in system 10 may be seen, including an exemplary arrangement of flow control logic. More specifically, to operate a 1 kW hydraulic motor 18, pumps 14 direct compressed air to pressurized holding tank 16 along a fluid line 52. In one exemplary arrangement, pumps 14 direct the compressed air along a common fluid line 52, as shown. There are two exit ports 54, 56 from pressurized holding tank 16. The exit ports 54, 56 are fluidly connected to a flow control regulator 58, which, in turn, is connected to motor 18.
[0019] Disposed within the flow paths of the exit ports are check valves 60. In the exemplary arrangement disclosed, check valves 60 are 100 psi pilot operated check valves designed to permit pressurized fluid to operate motor 18. However, to prevent a blow out, fluid loop 50 may also include 145 psi Pilot operated check valves 62. A 5 psi check valve 64 may also be provided to prevent reverse blow back in fluid loop 50.
[0020] System 10 advantageously requires low maintenance and allows storage of energy for selective and steady, controlled release of energy, regardless of wind speeds. Further, unlike systems that employ air compressors, system 10 is quiet.
[0021] An alternative exemplary arrangement of a storage and generation system 100 is shown in FIG. 3. Storage and generation system 100 is disposed in a stacked manner, with a pressurized holding tank 102 being disposed beneath a non pressurized return tank 104. In this configuration, tanks 102 and 104 may be concealed within a hollow tube or tower member.
[0022] Wind turbines 106 are arranged along a common axial shaft 108 and shaft is operatively connected to a hydraulic pump (not shown) which is fluidly connected to pressurized holding tank 102. Similar to the previously described embodiment, a hydraulic motor 110 receives pressurized fluid from pressurized holding tank 102 at a predetermined and controlled rate. Hydraulic motor 110 is operatively connected to an electrical power generator 112. Unpressurized fluid is then returned to non-pressurized return tank 144.
[0023] It will be appreciated that the devices and methods described herein have broad applications. The foregoing embodiments were chosen and described in order to illustrate principles of the methods and apparatuses as well as some practical applications. The preceding description enables others skilled in the art to utilize methods and apparatuses in various embodiments and with various modifications as are suited to the particular use contemplated. In accordance with the provisions of the patent statutes, the principles and modes of operation of this invention have been explained and illustrated in exemplary embodiments.
[0024] It is intended that the scope of the present methods and apparatuses be defined by the following claims. However, it must be understood that this invention may be practiced otherwise than is specifically explained and illustrated without departing from its spirit or
scope. It should be understood by those skilled in the art that various alternatives to the embodiments described herein may be employed in practicing the claims without departing from the spirit and scope as defined in the following claims. The scope of the invention should be determined, not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. It is anticipated and intended that future developments will occur in the arts discussed herein, and that the disclosed systems and methods will be incorporated into such future examples. Furthermore, all terms used in the claims are intended to be given their broadest reasonable constructions and their ordinary meanings as understood by those skilled in the art unless an explicit indication to the contrary is made herein. In particular, use of the singular articles such as "a," "the," "said," etc. should be read to recite one or more of the indicated elements unless a claim recites an explicit limitation to the contrary. It is intended that the following claims define the scope of the invention and that the method and apparatus within the scope of these claims and their equivalents be covered thereby. In sum, it should be understood that the invention is capable of
modification and variation and is limited only by the following claims.
Claims
1. A wind power storage and electrical energy generation system, comprising: at least one wind turbine; a hydraulic pump operatively connected to each wind turbine; a pressurized holding tank; a hydraulic motor; a power generator; and a non-pressurized return tank.
2. The wind power storage and electrical energy generation system of claim 1, wherein a plurality of wind turbines are provided.
3. The wind power storage and electrical energy generation system of claim 2, wherein the system is a closed loop system.
4. The wind power storage and electrical energy generation system of claim 1, further comprising UV light operatively directed to the pressurized tank.
5. The wind power storage and electrical energy generation system of claim 1, wherein pressurized holding tank stores compressed air and fluid.
6. The wind power storage and electrical energy generation system of claim 1, wherein the system comprises a plurality of pumps and wind turbines, and wherein the pumps are fluidly connected along a common fluid line.
7. The wind power storage and electrical energy generation system of claim 6, wherein the fluid line has an output that is directly connected to the pressurized holding tank.
8. The wind power storage and electrical energy generation system of claim 1, further comprising an outlet from the pressurized holding tank, wherein the outlet is fluidly connected to the hydraulic motor.
9. The wind power storage and electrical energy generation system of claim 8, wherein a check valve is positioned between the outlet of the pressurized holding tank and the hydraulic motor so as to permit the system to provide a threshold pressure to the hydraulic motor.
10. The wind power storage and electrical energy generation system of claim 9, further comprising a flow control regulator positioned between the check valve and the hydraulic motor.
11. The wind power storage and electrical energy generation system of claim 1 , wherein the power generator is connected to the hydraulic motor.
12. The wind power storage and electrical energy generation system of claim 1, wherein the non-pressurized return tank is fluidly connected to the hydraulic motor.
13. The wind power storage and electrical energy generation system of claim 1, wherein non-pressurized return tank and the pressurized tank are stacked on one another.
14. The wind power storage and electrical energy generation system, wherein a plurality of wind turbines are arranged along a common axial shaft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36394310P | 2010-07-13 | 2010-07-13 | |
US61/363,943 | 2010-07-13 |
Publications (1)
Publication Number | Publication Date |
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WO2012009478A1 true WO2012009478A1 (en) | 2012-01-19 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/US2011/043916 WO2012009478A1 (en) | 2010-07-13 | 2011-07-13 | Hydraulic wind power storage and electrical energy generation system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112610419A (en) * | 2020-12-16 | 2021-04-06 | 南京工程学院 | Hydraulic wind turbine generator set based on PLC and MSC II control |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070138798A1 (en) * | 2005-07-27 | 2007-06-21 | Mcclintic Frank J | Methods and apparatus for advanced wind turbine design |
US20070187617A1 (en) * | 2006-02-14 | 2007-08-16 | Hosung Kong | Method and device for monitoring oil oxidation in real time by measuring fluorescence |
US20090107567A1 (en) * | 2007-10-26 | 2009-04-30 | Crary Peter B | Combination water tower and electrical wind turbine generator |
US20100104439A1 (en) * | 2008-10-29 | 2010-04-29 | Mitsubishi Heavy Industries, Ltd. | Hydraulic system and wind turbine generator provided therewith |
-
2011
- 2011-07-13 WO PCT/US2011/043916 patent/WO2012009478A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070138798A1 (en) * | 2005-07-27 | 2007-06-21 | Mcclintic Frank J | Methods and apparatus for advanced wind turbine design |
US20070187617A1 (en) * | 2006-02-14 | 2007-08-16 | Hosung Kong | Method and device for monitoring oil oxidation in real time by measuring fluorescence |
US20090107567A1 (en) * | 2007-10-26 | 2009-04-30 | Crary Peter B | Combination water tower and electrical wind turbine generator |
US20100104439A1 (en) * | 2008-10-29 | 2010-04-29 | Mitsubishi Heavy Industries, Ltd. | Hydraulic system and wind turbine generator provided therewith |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112610419A (en) * | 2020-12-16 | 2021-04-06 | 南京工程学院 | Hydraulic wind turbine generator set based on PLC and MSC II control |
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