CN104832374A - Wind energy, wave energy and ocean current energy integrated power generation system - Google Patents
Wind energy, wave energy and ocean current energy integrated power generation system Download PDFInfo
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- CN104832374A CN104832374A CN201510227545.0A CN201510227545A CN104832374A CN 104832374 A CN104832374 A CN 104832374A CN 201510227545 A CN201510227545 A CN 201510227545A CN 104832374 A CN104832374 A CN 104832374A
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- 238000010248 power generation Methods 0.000 title claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims description 30
- 238000007667 floating Methods 0.000 claims description 27
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 10
- 230000005611 electricity Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- 239000013535 sea water Substances 0.000 description 1
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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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a wind energy, wave energy and ocean current energy integrated power generation system. The system comprises a single-pile tower drum, and a wind energy power generation system, a wave energy power generation system and an ocean current energy power generation system which are arranged on the single-pile tower drum, wherein the single-pile tower drum is vertically fixed to a seabed; the wind energy power generation system is arranged at the top end of the single-pile tower drum; the wave energy power generation system is arranged on the side part of the single-pile tower drum nearby the sea level; the ocean current energy power generation system is arranged at the bottom of the single-pile tower drum on the seabed; output ends of the wind energy power generation system, the wave energy power generation system and the ocean current energy power generation system are connected with a transformer to be input to a grid. A single-pile tower drum supporting structure serves as a foundation in the wind energy, wave energy and ocean current energy integrated power generation system, the wind energy, wave energy and ocean current energy integrated power generation system is vertically fixed to the seabed, the wind energy, wave energy and ocean current energy integrated power generation system is convenient in machining, mounting and construction, relatively low in cost, wide in material selection and high in implementation, and the cost of power generation is reduced to a large degree.
Description
Technical field
The present invention relates to a kind of power generation system, especially relate to the power generation system of a kind of wind energy-wave energy-energy by ocean current one, based on single pile tower cylinder supporting structure, wind energy-wave energy-energy by ocean current is combined.
Technical background
China mainland shore line to Beilun Estuary, reaches km more than 1.8 ten thousand from Yalujiang Estuary.In addition, island seashore line length km more than 1.4 ten thousand, mainland coastline overall length km more than 3.2 ten thousand.Can see show that the marine resources of China compare abundant thus, but the resource of ocean also there is no to be exploited well up to now.A national prosperity, except the effect of socio-economic development, energy role is also compare important, and the demand of the present energy is huge, is badly in need of looking for the novel energy to replace fossil fuel.At present, wind energy, wave energy, energy by ocean current is free of contamination non-fossil energy, and it is abundant that source is compared, and is inexhaustible renewable resources, and have a high potential, the market prospects developed are very optimistic, save again valuable land resources, how to utilize these resources to be the problem that contemporary people is studied always.Utilizing marine energy to carry out generating electricity is a kind of important approach of utilization to marine resources, wind energy power is not only in the whole world but also be also be unusual maturation in China, the principle of wind energy power: wind wheel rotates under extra large wind action, wind energy transformation is become mechanical energy, mechanical energy is power electric generators, realizes wind energy power.The principle of wave-energy power generation: utilize swinging up and down of wave, promote buoyancy aid and move up and down, being converted into the motion of rotation by pumping, is power electric generators, realizes the generating of wave energy.The electricity generating principle of energy by ocean current: the flowing of seawater promotes the rotation of impeller, and energy by ocean current is converted into mechanical energy, and mechanical energy is power electric generators, realizes energy by ocean current generating.
Summary of the invention
In order to the energy that can better utilize ocean to bring, the present invention proposes the power generation system of a kind of wind energy-wave energy-energy by ocean current one, in ocean, utilize single pile tower cylinder supporting structure to establish wind energy, wave energy, energy by ocean current system is in the power generation system of one, wherein floating drum is with iron chains anchor to seabed, and form an overall power generation system, these three kinds of power generation systems are attached on same single pile tower barrel structure.
The technical solution adopted in the present invention is:
The present invention includes single pile tower cylinder and be arranged on wind power generation system, Wave energy generating system, the energy by ocean current power generation system on single pile tower cylinder, single pile tower cylinder is vertically fixed on sea bed, wind power generation system is arranged on the top of single pile tower cylinder, Wave energy generating system is arranged on the sidepiece of the single pile tower cylinder near sea level, energy by ocean current power generation system be arranged on be positioned at seabed single pile tower cylinder bottom, the output terminal of wind power generation system, Wave energy generating system, energy by ocean current power generation system is all connected with transformer and is input in electrical network.
Described wind power generation system: windmill is built with wind wheel, wind energy speed-changing gear box, tail vane, wind energy speed regulating mechanism, wind-driven generator and wind energy converter; The clutch end of wind wheel is connected with the power intake of wind energy speed-changing gear box, to increase speed, the speed that the clutch end of wind energy speed-changing gear box makes it export through wind energy speed regulating mechanism is even, speed regulating mechanism is connected with the input shaft of wind-driven generator, the output terminal of wind-driven generator is connected with the input end of wind energy converter, the input end of the output terminal connection transformer of wind energy converter; The afterbody of windmill is installed with tail vane, and tail vane is one block of plate vertically laid, and for regulating the orientation of wind wheel to make it align wind direction, better catches energy effect to reach.
Described Wave energy generating system: comprise floating drum, linkage mechanism, wave energy speed-changing gear box, wave energy generator and wave energy current transformer; Floating drum floats on sea, floating drum both sides respectively connect two pieces of weight block through a cable chain, weight block sinks to seabed, floating drum is hinged through the edge of linkage mechanism and gear, slide block through linkage mechanism is fixedly connected with floating drum, gear is connected with wave energy generator input shaft through wave energy speed-changing gear box, and the output terminal of wave energy generator is connected with the input end of wave energy current transformer, the input end of the output terminal connection transformer of wave energy current transformer; Wave energy generator, gear and wave energy speed-changing gear box are all fixed on the sidepiece of single pile tower cylinder by wave energy system mountion plate.Wherein linkage mechanism and floating drum form slide block fourbar linkage, and the moving direction of floating drum is changed, the motion having become driven gear to rotate by upper and lower movement transition, and then drive energy by ocean current electrical power generators.
Described energy by ocean current power generation system: comprise and be arranged on the identical ocean current energy generator of single pile tower cylinder two bottom sides, ocean current energy generator comprises turbine impeller, energy by ocean current speed-changing gear box, energy by ocean current generator and energy by ocean current current transformer; The clutch end of turbine impeller is connected through the power intake of connecting shaft with energy by ocean current speed-changing gear box, it is made to increase with the rotating speed transforming impeller, the clutch end of energy by ocean current speed-changing gear box connects the input end of energy by ocean current generator through speed regulating mechanism, the output terminal of energy by ocean current generator is connected with the input end of energy by ocean current current transformer, the input end of the output terminal connection transformer of energy by ocean current current transformer.
Single pile tower cylinder of the present invention includes its supporting structure and supporting electrical power transmission system and transformer.
The present invention has wind wheel to rotate by top, can be used to collect wind energy, and then drive electrical generators generating; Middle part have floating drum pump drive electrical generators be used for generating; Bottom has impeller to collect energy by ocean current, and then rotarily drives generator and generate electricity.
Windmill afterbody has tail vane, can reverse end for end to rotate according to wind direction, better can collect sea wind, and reaching larger catching can effect.
By the motion having changed into and rotated that pumps of wave energy in the middle part of the present invention, provide power for generator operation and then complete the generating of wave energy.
The structure of more than the present invention is adopted to have the following advantages compared with invention in the past:
Wind energy can be collected by structure of the present invention simultaneously, wave energy and energy by ocean current generate electricity, and wind wheel can change direction when collection wind energy, reach larger seizure energy and be used for generating electricity, pumping of floating drum can be converted into the rotary motion of drive electrical generators.
As improvement, connection of the present invention is all detachable, is convenient to local fault detachable maintaining and replacement part, and need not dismantles the system of entirety, is convenient to maintenance and component interchanging.
Accompanying drawing explanation
Fig. 1 be present system structural drawing.
Fig. 2 is structure and the operating diagram of Wave energy generating system.
Fig. 3 be energy by ocean current power generation system overlook enlarged view.
In figure: 1, wind wheel, 2, wind energy speed-changing gear box, 3, wind energy speed regulating mechanism, 4, wind-driven generator, 5, tail vane, 6, wind energy converter, 7, single pile tower cylinder, 8, gear, 9, wave energy generator, 10, linkage mechanism, 11, wave energy system mountion plate, 12, floating drum, 13, cable chain, 14, weight block, 15, energy by ocean current generator, 16, turbine impeller, 17, wave energy generator input shaft, 18, wave energy speed-changing gear box, 19, connecting shaft, 20, energy by ocean current speed-changing gear box, 21, energy by ocean current system converter.
Embodiment
Below in conjunction with accompanying drawing and concrete implementation step, elaboration detailed is further carried out to the present invention.
As shown in Figure 1, the present invention includes single pile tower cylinder 7 and be arranged on wind power generation system, Wave energy generating system, the energy by ocean current power generation system on single pile tower cylinder 7, single pile tower cylinder 7 is vertically fixed on sea bed, wind power generation system is arranged on the top of single pile tower cylinder 7, Wave energy generating system is arranged on the sidepiece of the single pile tower cylinder 7 near sea level, energy by ocean current power generation system be arranged on be positioned at seabed single pile tower cylinder 7 bottom, the output terminal of wind power generation system, Wave energy generating system, energy by ocean current power generation system is all connected with transformer and is input in electrical network.
As shown in Figure 1, wind power generation system: windmill is built with wind wheel 1, wind energy speed-changing gear box 2, tail vane 5, wind-driven generator 4 and wind energy converter 6; The clutch end of wind wheel 1 is connected with the power intake of wind energy speed-changing gear box 2 to regulate its rotating speed to make it increase, the clutch end of wind energy speed-changing gear box 2 is connected through the input shaft of wind energy speed regulating mechanism 3 with wind-driven generator 4, the output terminal of wind-driven generator 4 is connected with the input end of wind energy converter 6, the input end of the output terminal connection transformer of wind energy converter 6; The afterbody of windmill is installed with tail vane 5, and tail vane 5 is one block of plate vertically laid, and for regulating the orientation of wind wheel 1 to make it align wind direction, catch energy ability, and tail vane 5 also has brake function, has the function of protection windmill to increase it.
The present invention is carrying between high-revolving speed-changing gear box and motor, all will install a speed regulating mechanism, makes rotating speed keep stable, to reduce the damage to generator.
As shown in Figure 2, Wave energy generating system: comprise floating drum 12, linkage mechanism 10, wave energy speed-changing gear box 18, wave energy generator 9 and wave energy current transformer; Floating drum 12 floats on sea, floating drum 12 both sides respectively connect two pieces of weight block 14 through a cable chain 13, weight block 14 sinks to seabed, floating drum 12 is hinged through the edge of linkage mechanism 10 and gear 8, through end and floating drum 12 fixed hinge of linkage mechanism 10, gear 8 is connected with wave energy generator input shaft 17 through wave energy speed-changing gear box 18, and the output terminal of wave energy generator 9 is connected with the input end of wave energy current transformer, the input end of the output terminal connection transformer of wave energy current transformer.Wave energy generator 9, gear 8 and wave energy speed-changing gear box 18 are all fixed on the sidepiece of single pile tower cylinder 7 by wave energy system scaffold 11.
The rotary motion of linkage rod slide block mechanism driven gear, gear driven speed-changing gear box moves, and the drivening rod of the concussion up and down slide-block mechanism motion of wave, linkage rod slide block mechanism driven gear gearbox rotates, and then drives engine operation.
As shown in Figure 3, energy by ocean current power generation system: comprise and be arranged on the identical ocean current energy generator of single pile tower cylinder 7 two bottom sides, ocean current energy generator comprises turbine impeller 16, energy by ocean current speed-changing gear box 20, energy by ocean current generator 15 and energy by ocean current system converter 21; The clutch end of turbine impeller 16 is connected through the power intake of connecting shaft 19 with energy by ocean current speed-changing gear box 20, it is made to increase to regulate its rotating speed, the clutch end of energy by ocean current speed-changing gear box 20 is connected with energy by ocean current generator 15 through speed regulating mechanism, the output terminal of energy by ocean current generator 15 is connected with the input end of energy by ocean current current transformer 21, the input end of the output terminal connection transformer of energy by ocean current current transformer 21.
Case study on implementation of the present invention and implementation process as follows:
A single pile tower cylinder 7 is fixed in the seabed of greater coasting area; install a windmill with tail vane 5 in single pile tower barrel structure 7 upper end, wherein tail vane 5 can regulate the orientation of wind wheel, makes it align wind direction; and tail vane 5 also has brake function, there is the function of protection windmill.Position after wind wheel 1, is provided with speed-changing gear box 2 and wind energy speed regulating mechanism 3, and generator 4 and wind energy system current transformer 6.Carrying between high-revolving speed-changing gear box and motor, a speed regulating mechanism 3 is being installed, making rotating speed keep stable, to reduce the damage to generator.
A wave energy mountion plate 11 installed by the lower end single pile tower cylinder 7 of windmill, place wave energy generator 9 above, wave-energy power generation speed-changing gear box 18 and gear 8 and linkage mechanism 10, sea level arranges floating drum 12, floating drum 12 below four angle cable chains 13 links weight block 14, be fixed on seabed, floating drum 12 is allowed only to move up and down, floating drum 12 is arranged a linkage mechanism 10, wherein floating drum 12 is equivalent to slide block, form biased sliding-block linkage, pumping of floating drum 12 can be allowed to be converted into the motion of driven gear 8 rotation, the gear rotary motion in wave energy speed-changing gear box 18 is taken in right back-geared rotary motion to, wave energy engine input shaft 17 is driven to rotate through wave energy speed-changing gear box 18, for wave energy generator 9 provides the power of work, reach the object of generating.Wherein speed-changing gear box reaches and regulates its rotating speed to make its speedup.
Be provided with turbine impeller 16 bottom at single pile tower barrel structure 7, vane rotary driven gear gearbox 20 moves, and speedup drives connecting shaft 19 to move later, for energy by ocean current generator 15 provides power, generates electricity.
Adopt the present invention's unification after respective current transformer rectification that generates electricity to receive transformer and carry out transformation, then access in electrical network, factory can be supplied or resident carries out electricity consumption.
Thus, the single pile tower cylinder supporting structure processing that the present invention adopts, installation and easy construction, cost is lower; Power generates electricity, and wave-energy power generation and energy by ocean current generating complete in a supporting structure, reduce the cost of generating significantly; Structural stability is reasonable, and material selection is comparatively extensive, and more a step demonstrates exploitativeness of the present invention, has significant technique effect.
Claims (4)
1. the power generation system of wind energy-wave energy-energy by ocean current one, it is characterized in that: the wind power generation system comprising single pile tower cylinder (7) and be arranged on single pile tower cylinder (7), Wave energy generating system, energy by ocean current power generation system, single pile tower cylinder (7) is vertically fixed on sea bed, wind power generation system is arranged on the top of single pile tower cylinder (7), Wave energy generating system is arranged on the sidepiece of the single pile tower cylinder (7) near sea level, energy by ocean current power generation system is arranged on single pile tower cylinder (7) bottom being positioned at seabed, wind power generation system, Wave energy generating system, the output terminal of energy by ocean current power generation system is all connected with transformer and is input in electrical network.
2. the power generation system of a kind of wind energy-wave energy according to claim 1-energy by ocean current one, is characterized in that: described wind power generation system: windmill is built with wind wheel (1), wind energy speed-changing gear box (2), tail vane (5), wind energy speed regulating mechanism (3), wind-driven generator (4) and wind energy converter (6); The clutch end of wind wheel (1) is connected with the power intake of wind energy speed-changing gear box (2), the speed that the clutch end of wind energy speed-changing gear box (2) makes it export through wind energy speed regulating mechanism (3) is even, speed regulating mechanism (3) is connected with the input shaft of wind-driven generator (4), the output terminal of wind-driven generator (4) is connected with the input end of wind energy converter (6), the input end of the output terminal connection transformer of wind energy converter (6); The afterbody of windmill is installed with tail vane (5), and tail vane (5) is one block of plate vertically laid, and makes it align wind direction for regulating the orientation of wind wheel (1).
3. the power generation system of a kind of wind energy-wave energy according to claim 1-energy by ocean current one, is characterized in that: described Wave energy generating system: comprise floating drum (12), linkage mechanism (10), wave energy speed-changing gear box (18), wave energy generator (9) and wave energy current transformer; Floating drum (12) floats on sea, floating drum (12) both sides respectively connect two pieces of weight block (14) through a cable chain (13), weight block (14) sinks to seabed, floating drum (12) is hinged through the edge of linkage mechanism (10) and gear (8), slide block through linkage mechanism (10) is fixedly connected with floating drum (12), gear (8) is connected with wave energy generator input shaft (17) through wave energy speed-changing gear box (18), the output terminal of wave energy generator (9) is connected with the input end of wave energy current transformer, the input end of the output terminal connection transformer of wave energy current transformer; Wave energy generator (9), gear (8) and wave energy speed-changing gear box (18) are all fixed on the sidepiece of single pile tower cylinder (7) by wave energy system mountion plate (11).
4. the power generation system of a kind of wind energy-wave energy according to claim 1-energy by ocean current one, it is characterized in that: described energy by ocean current power generation system: comprise and be arranged on the identical ocean current energy generator of single pile tower cylinder (7) two bottom sides, ocean current energy generator comprises turbine impeller (16), energy by ocean current speed-changing gear box (20), energy by ocean current generator (15) and energy by ocean current current transformer (21); The clutch end of turbine impeller (16) is connected through the power intake of connecting shaft (19) with energy by ocean current speed-changing gear box (20), the clutch end of energy by ocean current speed-changing gear box (20) connects the input end of energy by ocean current generator (15) through speed regulating mechanism, the output terminal of energy by ocean current generator (15) is connected with the input end of energy by ocean current current transformer (21), the input end of the output terminal connection transformer of energy by ocean current current transformer (21).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105863945A (en) * | 2016-06-07 | 2016-08-17 | 上海海洋大学 | Bionic fish-shaped power generating set |
| CN107131093A (en) * | 2017-07-14 | 2017-09-05 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
| CN107165772A (en) * | 2017-07-14 | 2017-09-15 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
| CN107191315A (en) * | 2017-07-14 | 2017-09-22 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
| CN107725259A (en) * | 2017-11-09 | 2018-02-23 | 大连理工大学 | Based on single pile formula wind energy and wave energy marine tidal-current energy integrated power generation system |
| CN108843484A (en) * | 2018-05-21 | 2018-11-20 | 江苏科技大学 | A kind of floating-type tidal current energy and wave energy comprehensive utilization device based on conflux carrier |
| CN109026506A (en) * | 2018-09-13 | 2018-12-18 | 李白 | A kind of wind-power hydraulic combined generating device |
| CN109209775A (en) * | 2018-09-30 | 2019-01-15 | 中国海洋大学 | A kind of wind energy and wave energy composite generating set and its electricity-generating method |
| CN112901418A (en) * | 2021-01-29 | 2021-06-04 | 武汉理工大学 | Ocean energy comprehensive utilization system integrating wind, wave and flow energy power generation device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105863945A (en) * | 2016-06-07 | 2016-08-17 | 上海海洋大学 | Bionic fish-shaped power generating set |
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| CN107165772A (en) * | 2017-07-14 | 2017-09-15 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
| CN107191315A (en) * | 2017-07-14 | 2017-09-22 | 国电联合动力技术有限公司 | A kind of Ocean Tidal Current Energy electricity generation system |
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| CN107725259A (en) * | 2017-11-09 | 2018-02-23 | 大连理工大学 | Based on single pile formula wind energy and wave energy marine tidal-current energy integrated power generation system |
| US10890162B2 (en) | 2017-11-09 | 2021-01-12 | Dalian University Of Technology | Wind energy, wave energy and tidal energy integrated power generation system based on monopile foundation |
| CN108843484A (en) * | 2018-05-21 | 2018-11-20 | 江苏科技大学 | A kind of floating-type tidal current energy and wave energy comprehensive utilization device based on conflux carrier |
| CN109026506A (en) * | 2018-09-13 | 2018-12-18 | 李白 | A kind of wind-power hydraulic combined generating device |
| CN109209775B (en) * | 2018-09-30 | 2020-02-21 | 中国海洋大学 | Wind energy and wave energy comprehensive power generation device and power generation method thereof |
| CN109209775A (en) * | 2018-09-30 | 2019-01-15 | 中国海洋大学 | A kind of wind energy and wave energy composite generating set and its electricity-generating method |
| CN112901418A (en) * | 2021-01-29 | 2021-06-04 | 武汉理工大学 | Ocean energy comprehensive utilization system integrating wind, wave and flow energy power generation device |
| CN112901418B (en) * | 2021-01-29 | 2022-10-18 | 武汉理工大学 | Ocean energy comprehensive utilization system integrating wind, wave and flow energy power generation device |
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