CN112302877A - Offshore wind power and wave power combined power generation system and working method thereof - Google Patents

Offshore wind power and wave power combined power generation system and working method thereof Download PDF

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Publication number
CN112302877A
CN112302877A CN202011315120.2A CN202011315120A CN112302877A CN 112302877 A CN112302877 A CN 112302877A CN 202011315120 A CN202011315120 A CN 202011315120A CN 112302877 A CN112302877 A CN 112302877A
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CN
China
Prior art keywords
power generation
section
offshore
air inlet
wave energy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011315120.2A
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Chinese (zh)
Inventor
杨剑
田仲伟
郑建涛
王绍民
郑建敏
魏守成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Branch Of China Huaneng Group Co ltd
Huaneng Clean Energy Research Institute
Original Assignee
Fujian Branch Of China Huaneng Group Co ltd
Huaneng Clean Energy Research Institute
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Publication date
Application filed by Fujian Branch Of China Huaneng Group Co ltd, Huaneng Clean Energy Research Institute filed Critical Fujian Branch Of China Huaneng Group Co ltd
Priority to CN202011315120.2A priority Critical patent/CN112302877A/en
Publication of CN112302877A publication Critical patent/CN112302877A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/25Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/141Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector
    • F03B13/142Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which creates an oscillating water column
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/16Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/18Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/065Rotors characterised by their construction, i.e. structural design details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00Application
    • F05B2220/70Application in combination with
    • F05B2220/706Application in combination with an electrical generator
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/727Offshore wind turbines

Abstract

The invention discloses an offshore wind power and wave energy combined power generation system and a working method thereof, and belongs to the technical field of offshore wind power and ocean wave energy power generation. A tower drum of the offshore power generation fan is connected with an offshore floating platform, and the offshore floating platform is fixed through a mooring system; the offshore floating platform comprises a plurality of floaters, and the upper parts and the lower parts of the floaters are connected through hollow structures; the upper part of the floater is hollow, and a wave energy power generation system is arranged in the floater. Wind energy and wave energy in the region are fully utilized to generate electricity, the application range is wide, and the structure is stable. The wave energy power generation system is provided with the independent gas inlet and outlet channels, the independent work of each channel in the same time is guaranteed by the one-way valve, the inlet and outlet gas flows are fully utilized, the reciprocating motion of the gas flows is converted into the one-way rotation of the turbine, the device structure is simple, and the cost is low.

Description

Offshore wind power and wave power combined power generation system and working method thereof
Technical Field
The invention belongs to the technical field of offshore wind power and ocean wave energy power generation, and particularly relates to an offshore wind power and wave energy combined power generation system and a working method thereof.
Background
At present, offshore wind power in China is rapidly developing. The offshore wind farm site selection requires certain wind speed and stronger wind power, and the offshore wind farm is also a site for enriching wave energy resources because the wave energy is generated by wind power. The development of offshore wind power is combined with the utilization of wave energy resources, so that the power generation capacity of an offshore power plant can be effectively expanded, and the overall economy of the offshore power plant is improved.
The common characteristics of offshore wind power and wave power generation are that wind power and wave power are far off the shore and more concentrated at deeper water depth. However, the depth is too large, which is not beneficial to the construction of the fixed foundation wind power platform, so people propose the offshore wind power device with the floating foundation, but the floating foundation platform is easily affected by sea waves and has poor stability.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide an offshore wind and wave energy combined power generation system and a working method thereof, which can comprehensively utilize wind energy and wave energy in a region to generate power, and have the advantages of wide application range and stable structure.
The invention is realized by the following technical scheme:
the invention discloses an offshore wind power and wave energy combined power generation system, which comprises an offshore power generation fan and an offshore floating platform, wherein a tower cylinder of the offshore power generation fan is connected with the offshore floating platform, and the offshore floating platform is fixed through a mooring system; the offshore floating platform comprises a plurality of floaters, and the upper parts and the lower parts of the floaters are connected through hollow structures; the upper part of the floater is hollow, and a wave energy power generation system is arranged in the floater;
the wave energy power generation system comprises a cavity, an air inlet pipe I section, an air outlet pipe I section, a turbine, a generator, a turbine chamber, an air inlet pipe II section and an air outlet pipe II section; the lower end of the cavity is provided with an opening and is communicated with the hollow structure of the floater; the upper end of the cavity is provided with an air inlet and outlet which are connected with the first section of the air inlet pipe and the first section of the air outlet pipe, the first section of the air inlet pipe and the first section of the air outlet pipe are connected with one side of the turbine chamber, and the other side of the turbine chamber is connected with the second section of the air inlet pipe and the second section of the air outlet pipe; an air inlet one-way valve is arranged in the first section of the air inlet pipe, an air outlet one-way valve is arranged in the second section of the air outlet pipe, and the second sections of the air inlet pipe and the air outlet pipe are communicated with the outside; the turbine is arranged in the turbine chamber, the turbine is connected with the generator, and the turbine rotates in a single direction under the action of the reciprocating airflow.
Preferably, the inner wall of the turbine chamber is continuously curved.
Preferably, the cavity tapers in volume from the middle to the inlet and outlet.
Further preferably, the air inlet and outlet is provided at the centre of the top of the cavity.
Preferably, the pipe diameter of the second section of the air inlet pipe is gradually enlarged from inside to outside, and the pipe diameter of the second section of the air outlet pipe is gradually reduced from inside to outside.
Preferably, the gas inlet and outlet are connected with the I section of the gas inlet pipe and the I section of the gas outlet pipe by adopting bent pipes.
Preferably, the offshore floating platform further comprises a central bearing platform and a support, the plurality of floats are arranged around the central bearing platform, the floats are connected with the central bearing platform through the support, and a tower drum of the offshore power generation fan is connected with the central bearing platform.
Further preferably, the number of the floats is 3, the floats are distributed on 3 vertexes of the equilateral triangle, and the support comprises a plurality of horizontal branch pipes and a plurality of inclined pull pipes.
Preferably, the float is a cylinder.
The invention discloses a working method of the offshore wind power and wave energy combined power generation system, which comprises the following steps:
the offshore floating platform is fixed on the sea surface through a mooring system, and the offshore power generation fan utilizes offshore wind energy to generate power; the wave energy power generation system in the floater utilizes wave energy to generate power: the waves excite the water surface in the cavity to oscillate up and down, when the water surface moves upwards, gas in the cavity is extruded by the water surface, enters the turbine chamber to drive the turbine to rotate after entering the section I of the gas outlet pipe through the gas inlet and outlet, the turbine drives the generator to rotate to generate power, and then the gas is discharged from the section II of the gas outlet pipe after passing through the gas outlet one-way valve; when the water surface moves downwards, the air pressure in the cavity is reduced, external air enters the turbine chamber from the second section of the air inlet pipe under the action of the atmospheric pressure to drive the turbine to rotate so as to drive the generator to rotate and generate electricity, and then the air enters the first section of the air inlet pipe through the air inlet one-way valve and enters the cavity from the air inlet and outlet; the turbine rotates in a single direction under the action of reciprocating airflow, and the wave power generation system and the offshore power generation fan perform combined power generation.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the offshore wind power and wave energy combined power generation system disclosed by the invention, offshore wind power and wave energy power generation devices are combined and share an offshore wind power platform, so that the overall power generation power of the device is improved, and the generated energy and the effective working hours are increased. Offshore wind power combines together with wave energy power generation facility, can share offshore wind power platform, and construction cost is less than two kinds of power generation facility and builds the needs alone, has reduced the construction cost, and is convenient for the staff to carry out daily patrolling and examining and maintain. Compared with a fixed foundation device, the device has wider application range and can fully utilize ocean wind energy and wave energy resources of the near sea and the far sea. Compared with the traditional wave energy power generation device, the oscillating water column type wave energy power generation device has a very simple structure, the main equipment is placed above the sea surface, the requirements on sealing and corrosion resistance are low, and the maintenance is convenient; although the total power of the wave energy power generation device is small, the power consumption requirement of the device can be met, and the later-stage operation and maintenance and power consumption cost are reduced. The oscillating water column type wave power generation device does damping motion under the action of sea waves, can absorb the impact of the sea waves on the power generation platform, and is more stable than a common floating offshore wind power platform under the same wave height.
The upper portion of the floater is hollow, the arrangement space of the wave energy power generation system is provided, the hollow structure provides a channel for waves to enter and exit, and the lower portion of the floater is used as a main body for providing buoyancy, so that the structure is stable. The wave energy power generation system is arranged on the upper part of the floater, so that the sealing performance is good, and the corrosion prevention cost is low. The wave energy power generation system is provided with the independent gas inlet and outlet channels, the independent work of each channel in the same time is guaranteed by the one-way valve, the inlet and outlet gas flows are fully utilized, the reciprocating motion of the gas flows is converted into the one-way rotation of the turbine, the device structure is simple, and the cost is low.
Furthermore, the inner wall of the turbine chamber is a continuous curved surface, so that the continuous flow of gas can be ensured, and the working efficiency is improved.
Further, the cavity can improve the gas velocity of flow by the convergent of middle part to business turn over gas port volume, and then improves the generating efficiency.
Furthermore, the gas inlet and outlet is arranged at the center of the top of the cavity, so that the gas inlet and outlet efficiency can be improved.
Furthermore, II sections of the air inlet pipe are gradually expanded from inside to outside in pipe diameter, and II sections of the air outlet pipe are gradually reduced from inside to outside in pipe diameter, so that the flow rate of air inlet and air exhaust can be improved, and the efficiency of the system is improved.
Furthermore, the gas inlet and outlet are connected with the I section of the gas inlet pipe and the I section of the gas outlet pipe by adopting bent pipes, so that smooth flow of gas is ensured.
Furthermore, a central bearing platform of the offshore floating platform is connected with peripheral floaters through a support, and the central bearing platform is used for being connected with a tower barrel of the offshore power generation fan.
Furthermore, the floats are distributed in an equilateral triangle and have stable structure.
Furthermore, the floater is a cylinder, so that the structure is stable, and the stability in water is good.
The working method of the offshore wind power and wave energy combined power generation system disclosed by the invention fully utilizes wind energy and wave energy in the region, and has high automation degree and good economical efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of an offshore floating platform;
FIG. 3 is a schematic structural diagram of a wave energy power generation system;
fig. 4 is a schematic diagram of the working principle of the present invention.
In the figure: the marine power generation system comprises a marine power generation fan 1, a marine floating platform 2, a floater 2-1, a central bearing platform 2-2, a support 2-3, a wave energy power generation system 3, a cavity 3-1, an air inlet and outlet 3-2, an air inlet pipe I section 3-3, an air outlet pipe I section 3-4, an air inlet check valve 3-5, an air outlet check valve 3-6, a turbine 3-7, a generator 3-8, a turbine chamber 3-9, an air inlet pipe II section 3-10, an air outlet pipe II section 3-11, a mooring system 4 and a control system 5.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the invention:
as shown in fig. 1, the offshore wind power and wave power combined power generation system of the present invention comprises an offshore power generation fan 1 and an offshore floating platform 2, wherein a tower of the offshore power generation fan 1 is connected to the offshore floating platform 2, and the offshore floating platform 2 is fixed by a mooring system 4; the offshore floating platform 2 comprises a plurality of floaters 2-1, and the upper parts and the lower parts of the floaters 2-1 are connected through a hollow structure; the upper part of the floater 2-1 is hollow, and the wave energy power generation system 3 is arranged in the floater.
The wave power generation system 3 comprises a cavity 3-1, an air inlet pipe I section 3-3, an air outlet pipe I section 3-4, a turbine 3-7, a generator 3-8, a turbine chamber 3-9, an air inlet pipe II section 3-10 and an air outlet pipe II section 3-11; the lower end of the cavity 3-1 is opened and is communicated with the hollow structure of the floater 2-1; the upper end of the cavity 3-1 is provided with an air inlet and outlet port 3-2, the air inlet and outlet port 3-2 is connected with a first section 3-3 of an air inlet pipe and a first section 3-4 of an air outlet pipe, the first section 3-3 of the air inlet pipe and the first section 3-4 of the air outlet pipe are connected with one side of a turbine chamber 3-9, and the other side of the turbine chamber 3-9 is connected with a second section 3-10 of the air inlet pipe and a second section 3-11 of the air outlet; an air inlet one-way valve 3-5 is arranged in the first section 3-3 of the air inlet pipe, an air outlet one-way valve 3-6 is arranged in the second section 3-11 of the air outlet pipe, and the second section 3-10 of the air inlet pipe and the second section 3-11 of the air outlet pipe are communicated with the outside; the turbine 3-7 is arranged in the turbine chamber 3-9, the inner wall of the turbine chamber 3-9 is preferably a continuous curved surface, the turbine 3-7 is connected with the generator 3-8, and the turbine 3-7 rotates in a single direction under the action of reciprocating airflow.
In a preferred embodiment of the invention, the cavity 3-1 has a gradually reduced volume from the middle to the air inlet/outlet 3-2, and is in the shape of an inverted funnel, and the air inlet/outlet 3-2 is arranged at the center of the top of the cavity 3-1, namely the mouth of the funnel.
In a preferred embodiment of the invention, the pipe diameters of the second sections 3-10 of the air inlet pipe are gradually expanded from inside to outside, and the pipe diameters of the second sections 3-11 of the air outlet pipe are gradually reduced from inside to outside. The gas inlet and outlet 3-2 is connected with the first section 3-3 of the gas inlet pipe and the first section 3-4 of the gas outlet pipe by adopting bent pipes.
Referring to fig. 2, in a preferred embodiment of the present invention, the offshore floating platform 2 further comprises a central platform 2-2 and a support 2-3, a plurality of cylindrical buoys 2-1 are arranged around the central platform 2-2, the buoys 2-1 are connected with the central platform 2-2 through the support 2-3, and a tower of the offshore power generation wind turbine 1 is connected with the central platform 2-2. The number of the floats 2-1 is 3, the floats are distributed on 3 vertexes of the equilateral triangle, and the support 2-3 comprises a plurality of horizontal branch pipes and a plurality of inclined pull pipes. And the bracket 2-3 is used for laying pipeline electric wires.
Referring to fig. 3, in one embodiment of the present invention, the first section 3-4 of the outlet duct and the second section 3-11 of the outlet duct are disposed above the first section 3-3 of the inlet duct and the second section 3-10 of the inlet duct. Or the section I3-3 of the air inlet pipe and the section II 3-10 of the air inlet pipe can be arranged above the section I3-4 of the air outlet pipe and the section II 3-11 of the air outlet pipe; similarly, the section I3-4 of the air outlet pipe, the section II 3-11 of the air outlet pipe, the section I3-3 of the air inlet pipe and the section II 3-10 of the air inlet pipe can be horizontally arranged in parallel.
The working method of the offshore wind power and wave energy combined power generation system comprises the following steps:
the offshore floating platform 2 is fixed on the sea surface through a mooring system 4, and the offshore power generation fan 1 generates power by using offshore wind energy;
as shown in fig. 4, the wave energy power generation system 3 in the floater 2-1 utilizes wave energy to generate power: the waves excite the water surface in the cavity 3-1 to oscillate up and down, when the water surface moves upwards, the gas in the cavity 3-1 is extruded by the water surface, enters the first section 3-4 of the gas outlet pipe through the gas inlet and outlet 3-2, enters the turbine chamber 3-9 to drive the turbine 3-7 to rotate, the turbine 3-7 drives the generator 3-8 to rotate to generate power, and then the gas is discharged from the second section 3-11 of the gas outlet pipe after passing through the gas outlet one-way valve 3-6; when the water surface moves downwards, the air pressure in the cavity 3-1 is reduced, external air enters the turbine chamber 3-9 from the second section 3-10 of the air inlet pipe to drive the turbine 3-7 to rotate and further drive the generator 3-8 to rotate and generate electricity under the action of the atmospheric pressure, then the air enters the first section 3-3 of the air inlet pipe through the air inlet one-way valve 3-5 and enters the cavity 3-1 from the air inlet 3-2; the turbines 3-7 rotate in a single direction under the action of reciprocating airflow, and the wave power generation system 3 and the offshore power generation fan 1 generate power jointly.
The electricity generated by the offshore power generation fan 1 and the wave energy power generation system 3 is regulated by a control system 5 arranged in the central bearing platform 2-2 and then is transmitted to a power grid, and can also be stored in an energy storage system. The control system 5 can utilize a mature regulating and power transmission system in the offshore wind power system to carry out inversion regulation on the power generated by the device, and the power is transmitted after being converted into direct current, so that a large amount of equipment is not required to be additionally arranged, and the construction is easy. Meanwhile, when the wave energy power generation system 3 is not needed for generating power temporarily, the control system 5 can control the turbines 3-7 and the generators 3-8 to be disconnected, and then control the turbines 3-7 and the generators to be connected when the wave energy part is needed to work.
The above description is only a part of the embodiments of the present invention, and although some terms are used in the present invention, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention and are to be construed as any additional limitation which is not in accordance with the spirit of the invention. The foregoing is merely an illustration of the present invention for the purpose of providing an easy understanding and is not intended to limit the present invention to the particular embodiments disclosed herein, and any technical extensions or innovations made herein are protected by the present invention.

Claims (10)

1. An offshore wind power and wave energy combined power generation system is characterized by comprising an offshore power generation fan (1) and an offshore floating platform (2), wherein a tower cylinder of the offshore power generation fan (1) is connected with the offshore floating platform (2), and the offshore floating platform (2) is fixed through a mooring system (4); the offshore floating platform (2) comprises a plurality of floaters (2-1), and the upper parts and the lower parts of the floaters (2-1) are connected through a hollow structure; the upper part of the floater (2-1) is hollow, and a wave energy power generation system (3) is arranged in the floater;
the wave power generation system (3) comprises a cavity (3-1), an air inlet pipe I section (3-3), an air outlet pipe I section (3-4), a turbine (3-7), a generator (3-8), a turbine chamber (3-9), an air inlet pipe II section (3-10) and an air outlet pipe II section (3-11); the lower end of the cavity (3-1) is opened and is communicated with the hollow structure of the floater (2-1); an air inlet and outlet (3-2) is arranged at the upper end of the cavity (3-1), the air inlet and outlet (3-2) is connected with the first section (3-3) of the air inlet pipe and the first section (3-4) of the air outlet pipe, the first section (3-3) of the air inlet pipe and the first section (3-4) of the air outlet pipe are connected with one side of a turbine chamber (3-9), and the other side of the turbine chamber (3-9) is connected with the second section (3-10) of the air inlet pipe and the second section (3-11) of the air outlet pipe; an air inlet one-way valve (3-5) is arranged in the first section (3-3) of the air inlet pipe, an air outlet one-way valve (3-6) is arranged in the second section (3-11) of the air outlet pipe, and the second section (3-10) of the air inlet pipe and the second section (3-11) of the air outlet pipe are communicated with the outside; the turbines (3-7) are arranged in the turbine chambers (3-9), the turbines (3-7) are connected with the generators (3-8), and the turbines (3-7) rotate in a single direction under the action of reciprocating air flow.
2. Offshore combined generation system according to claim 1, characterised in that the inner wall of the turbine chamber (3-9) is continuously curved.
3. Offshore wind and wave energy combined power generation system according to claim 1, characterized in that the cavity (3-1) tapers in volume from the middle to the inlet and outlet ports (3-2).
4. Offshore wind and wave energy combined power generation system according to claim 3, characterized in that the air inlet and outlet (3-2) is provided at the centre of the top of the cavity (3-1).
5. Offshore wind and wave energy combined power generation system according to claim 1, characterized in that the pipe diameters of the inlet duct ii sections (3-10) are gradually enlarged from inside to outside, and the pipe diameters of the outlet duct ii sections (3-11) are gradually reduced from inside to outside.
6. The offshore wind and wave energy combined power generation system according to claim 1, wherein the air inlet and outlet (3-2) is connected with the first section of the air inlet pipe (3-3) and the first section of the air outlet pipe (3-4) by adopting bent pipes.
7. Offshore wind and wave energy combined power generation system according to claim 1, characterized in that the offshore floating platform (2) further comprises a central platform (2-2) and a support (2-3), a plurality of floats (2-1) are arranged around the central platform (2-2), the floats (2-1) are connected with the central platform (2-2) through the support (2-3), and the tower of the offshore power generation wind turbine (1) is connected with the central platform (2-2).
8. Offshore wind and wave energy combined power generation system according to claim 7, characterized in that the number of floats (2-1) is 3, distributed over 3 vertices of an equilateral triangle, and that the support (2-3) comprises several horizontal branches and several diagonal pipes.
9. Offshore wind and wave energy combined power generation system according to claim 1, characterized in that the floats (2-1) are cylinders.
10. The working method of the offshore wind and wave energy combined power generation system according to any one of claims 1 to 9, comprising:
the offshore floating platform (2) is fixed on the sea surface through a mooring system (4), and the offshore power generation fan (1) generates power by using offshore wind energy;
the wave energy power generation system (3) in the floater (2-1) utilizes wave energy to generate power: the wave excites the water surface in the cavity (3-1) to oscillate up and down, when the water surface moves upwards, the gas in the cavity (3-1) is extruded by the water surface, enters the first section (3-4) of the gas outlet pipe from the gas inlet and outlet (3-2), enters the turbine chamber (3-9) to drive the turbine (3-7) to rotate, the turbine (3-7) drives the generator (3-8) to rotate to generate power, and then the gas passes through the gas outlet one-way valve (3-6) and is discharged from the second section (3-11) of the gas outlet pipe; when the water surface moves downwards, the air pressure in the cavity (3-1) is reduced, external air enters the turbine chamber (3-9) from the second section (3-10) of the air inlet pipe under the action of the atmospheric pressure to drive the turbine (3-7) to rotate so as to drive the generator (3-8) to rotate and generate electricity, and then the air enters the first section (3-3) of the air inlet pipe through the air inlet one-way valve (3-5) and enters the cavity (3-1) from the air inlet and outlet (3-2);
the turbines (3-7) rotate in a single direction under the action of reciprocating airflow, and the wave energy power generation system (3) and the offshore power generation fan (1) perform combined power generation.
CN202011315120.2A 2020-11-20 2020-11-20 Offshore wind power and wave power combined power generation system and working method thereof Pending CN112302877A (en)

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