Offshore power generation device

Abstract

The invention discloses an offshore power generation device which comprises a floating type foundation, a wind driven generator and a tidal current energy generator. The wind driven generator generates electricity through wind energy, the tidal current energy generator generates electricity through tidal current energy, and the wind driven generator and the tidal current energy generator share the floating type foundation. The floating type foundation comprises a main buoy and auxiliary buoys, the auxiliary buoys are symmetrically distributed on the two sides of the main buoy in the water flow direction, the auxiliary buoys are connected with the main buoy through cross beams, the whole floating type foundation is in a three-body ship shape, and the main buoy is connected with a tower barrel of the wind driven generator. A channel for water flow to pass through is formed between the main buoy and the auxiliary buoy, the tidal current energy generator is installed in the channel between the main buoy and the auxiliary buoy, and the generating capacity of the tidal current energy generator is improved. The floating foundations provide installation foundations for the wind driven generator and the tidal current energy generator at the same time, the number of the floating foundations is reduced, the cost of an offshore power generation device is reduced, meanwhile, wind power generation and tidal current energy power generation are integrated into one platform, and the comprehensive cost of ocean resource utilization is reduced.

Description

Technical Field

[0001] The present application relates to the field of offshore wind power technology, and in particular to an offshore power generation device. Background Art

[0002] Due to the abundance of deep and deep offshore wind resources and their enormous development potential, offshore wind power development is gradually shifting from nearshore to deep and deep offshore. At the same time, my country is rich in tidal energy, which gives it inherent resource advantages for tidal energy development.

[0003] How to integrate the utilization of multiple marine resources into one platform to reduce the comprehensive cost of marine resource utilization has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] This application proposes an offshore power generation device to integrate multiple marine resources into one platform and reduce the overall cost of marine resource utilization.

[0005] In order to achieve the above-mentioned object, the present application provides an offshore power generation device, comprising a floating foundation, a wind turbine and a tidal energy generator;

[0006] The floating foundation comprises:

[0007] A main buoy, to which the tower of the wind turbine is connected, and the main buoy is connected to a seabed anchor pile via a mooring cable;

[0008] Auxiliary buoys are symmetrically distributed on both sides of the main buoy along the water flow direction, and the auxiliary buoys are connected to the main buoy through a crossbeam;

[0009] A water flow channel is formed between the main buoy and the auxiliary buoy. The tidal energy generator is connected to the floating foundation. The tidal energy generator is located in the water flow channel.

[0010] Preferably, in the above-mentioned offshore power generation device, the main buoy is connected to the mooring cable via a single-point mooring;

[0011] The fan of the wind generator is a horizontal axis fan.

[0012] Preferably, in the above-mentioned offshore power generation device, the crossbeam is connected to the upper ends of the main buoy and the auxiliary buoy, so that the crossbeam is always located above the water surface.

[0013] Preferably, in the above-mentioned offshore power generation device, the tidal energy generator is connected to the crossbeam via a supporting column;

[0014] The upper end of the support column is connected to the crossbeam, and the lower end of the support column is connected to the tidal energy generator. The tidal energy generator is suspended below the water surface through the support column.

[0015] Preferably, in the above-mentioned offshore power generation device, the upper end of the support column is hingedly connected to the crossbeam, and a telescopic mechanism is provided on the crossbeam, and the telescopic mechanism is used to drive the support column to rotate around the hinge position between the support column and the crossbeam to realize the lifting and lowering of the tidal energy generator.

[0016] Preferably, in the above-mentioned offshore power generation device, the telescopic mechanism is a telescopic cylinder.

[0017] Preferably, in the above-mentioned offshore power generation device, the tidal energy generator and the wind turbine of the wind turbine are located on the same side of the tower.

[0018] Preferably, in the above-mentioned offshore power generation device, at least one of the main buoy and the auxiliary buoy is in the form of a flat cylindrical structure, and a plane with a larger area of ​​the flat cylindrical structure is arranged along the direction of water flow.

[0019] Preferably, in the above-mentioned offshore power generation device, the flow-facing surfaces of the main buoy and the auxiliary buoy are streamlined.

[0020] Preferably, in the above-mentioned offshore power generation device, at least one of the main buoy and the auxiliary buoy is provided with a ballast pump, and the ballast pump is used to inject or discharge ballast medium into or out of the main buoy and the auxiliary buoy.

[0021] The offshore power generation device provided in the embodiment of the present application includes a floating foundation, a wind turbine and a tidal energy generator. The wind turbine uses wind energy to generate electricity; the tidal energy generator uses tidal energy to generate electricity. The wind turbine and the tidal energy generator share a floating foundation. The floating foundation includes a main pontoon and an auxiliary pontoon. The auxiliary pontoons are symmetrically distributed on both sides of the main pontoon along the direction of water flow. The auxiliary pontoons are connected to the main pontoon by crossbeams, and the overall shape is a trimaran. The main pontoon is connected to the wind turbine through a tower. A channel for water flow is formed between the main pontoon and the auxiliary pontoon. The tidal energy generator is installed in the channel between the main pontoon and the auxiliary pontoon to increase the power generation of the tidal energy generator. The floating foundation provides an installation foundation for both the wind turbine and the tidal energy generator, reducing the number of floating foundations and reducing the cost of the offshore power generation device. At the same time, the present application integrates wind energy generation and tidal energy generation into one platform, reducing the overall cost of marine resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or prior art descriptions. Obviously, the drawings described below are only some examples or embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on the provided drawings, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language context or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0023] Figure 1 It is a structural schematic diagram of the offshore power generation device provided in an embodiment of the present application.

[0024] in:

[0025] 1-Floating foundation; 11-Main buoy; 12-Auxiliary buoy; 13-Beam; 2-Wind turbine; 3-Tidal generator; 4-Mooring cable; 5-Support column; 6-Tower. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are merely for explaining the related application and are not intended to limit the application. The described embodiments are merely a portion of the embodiments of the present application and are not intended to be exhaustive. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in the present application without creative effort are intended to fall within the scope of protection of the present application.

[0027] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0028] It should be understood that the terms "system," "device," "unit," and / or "module" used in this application are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0029] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0030] In the description of the embodiments of this application, unless otherwise specified, " / " represents or. For example, A / B can represent A or B. "And / or" in this article is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "plurality" means two or more than two.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0032] With the development of technology, multifunctional integrated platforms are being developed to integrate various devices for utilizing marine resources into one platform to reduce the cost of marine resource utilization.

[0033] The offshore power generation device disclosed in the present application utilizes wind energy and tidal energy to generate electricity, thereby reducing the development cost of marine resources and saving intensive use of the sea.

[0034] Figure 1 This is a schematic structural diagram of the offshore power generation device disclosed in this application. The offshore power generation device includes a floating foundation 1, a wind turbine 2 and a tidal energy generator 3.

[0035] Wind turbine 2 generates electricity using wind energy, while tidal generator 3 generates electricity using tidal energy. Floating foundation 1 provides a mounting base for both wind turbine 2 and tidal generator 3. In other words, wind turbine 2 and tidal generator 3 share a single floating foundation 1, reducing the number of floating foundations 1 and the cost of offshore power generation equipment.

[0036] Optionally, the floating foundation 1 includes a main pontoon 11 and auxiliary pontoons 12. The auxiliary pontoons 12 are symmetrically distributed on both sides of the main pontoon 11 along the water flow direction. The auxiliary pontoons 12 are connected to the main pontoon 11 through a crossbeam 13, and the whole is a trimaran.

[0037] The auxiliary buoys 12 are symmetrically distributed on both sides of the main buoy 11 along the water flow direction. Specifically, the heights of the auxiliary buoys 12 on both sides of the main buoy 11 are equal, and the distances between the auxiliary buoys 12 on both sides of the main buoy 11 and the main buoy 11 are equal; and the weights of the auxiliary buoys 12 on both sides of the main buoy 11 are equal.

[0038] The cross beams 13 can be arranged in the horizontal direction or tilted upward or downward relative to the horizontal direction. Optionally, two groups of cross beams 13 are symmetrically arranged on both sides of the main buoy 11, and each group of cross beams 13 is connected to the auxiliary buoy 12 on the corresponding side.

[0039] Optionally, the cross beam 13 may also be provided through the main buoy 11 .

[0040] The main buoy 11 is connected to the tower 6 of the wind turbine 2 . The lower end of the tower 6 is connected to the main buoy 11 , and the upper end of the tower 6 is connected to the wind turbine of the wind turbine 2 .

[0041] like Figure 1 As shown, a channel for water flow is formed between the main buoy 11 and the auxiliary buoy 12. The channel is also oriented in the direction of the water flow, creating a canal effect. The water flow velocity between the main buoy 11 and the auxiliary buoy 12 is increased. Optionally, a tidal energy generator 3 is installed in the channel between the main buoy 11 and the auxiliary buoy 12 to increase the power generation capacity of the tidal energy generator 3. The tidal energy generator 3 is connected to at least one of the main buoy 11, the auxiliary buoy 12, and the crossbeam 13.

[0042] The tidal energy generator 3 is not limited to being installed between the main buoy 11 and the auxiliary buoy 12 , but may also be installed at other locations outside the channel between the main buoy 11 and the auxiliary buoy 12 that can come into contact with seawater.

[0043] To improve the stability of the offshore power generation device, the tidal energy generators 3 are symmetrically distributed on the floating foundation 1. Taking the tidal energy generator 3 installed between the main buoy 11 and the auxiliary buoy 12 as an example, at least one tidal energy generator 3 is installed in the channels symmetrically distributed on both sides of the main buoy 11.

[0044] An electric cabinet is provided on at least one of the floating foundation 1 and the tower 6 , and the tidal energy generator 3 and the wind turbine 2 may share the electric cabinet or may each have its own electric cabinet.

[0045] In some embodiments, the floating foundation 1 may also be a barge type, a semi-submersible type, a single column type or a tension leg type, etc. Specifically, it is selected by those skilled in the art according to actual needs and is not specifically limited here.

[0046] In an embodiment where the floating foundation 1 includes a main buoy 11 and auxiliary buoys 12, the main buoy 11 is connected to the mooring line 4 via a single-point mooring. The main buoy 11 can rotate 360 ​​degrees with wind and waves. Due to the weathervaning effect, the floating foundation 1 will be moored in the direction where the environmental forces are minimized. Optionally, the tower 6 and the single-point mooring are located at both ends of the main buoy 11 along the water flow direction.

[0047] Single-point mooring equipment is arranged on the main buoy 11, and the horizontal-axis wind turbine does not need a yaw bearing for wind orientation, which further reduces the cost of the offshore power generation device and improves the reliability of the horizontal-axis wind turbine in wind orientation.

[0048] Specifically, when the external wind direction changes, the floating foundation 1 can rotate around the single-point mooring device under the action of wind load, and the floating foundation 1 drives the wind turbine 2 to rotate synchronously through the tower 6, so that the wind turbine 2 is always facing the wind.

[0049] Since part of the flow velocity in the ocean current is generated by wind, in order to maximize the development of wind resources and tidal energy resources, the offshore power generation device disclosed in this application is suitable for being arranged in sea areas where the flow velocity is mainly generated by wind, so that the wind direction and the flow direction are consistent or the angle between the wind direction and the flow direction is very small.

[0050] Single point mooring is connected to the seabed anchor pile through at least one mooring line 4.

[0051] The main buoy 11 is not limited to being connected to the mooring line 4 by a single point mooring, but may be connected in other ways. In an embodiment where the main buoy 11 cannot rotate around the single point mooring, the horizontal axis wind turbine is directed to the wind by a yaw bearing.

[0052] The wind turbine 2 is a horizontal axis wind turbine. The rotor of a horizontal axis wind turbine is installed horizontally, and the blades are distributed vertically and parallel to the wind direction to collect wind energy.

[0053] The wind turbine of the wind turbine 2 may also be a vertical axis wind turbine.

[0054] Multiple cross beams 13 can be installed between the main buoy 11 and the auxiliary buoy 12 along the water flow direction; in the vertical direction, multiple layers of cross beams 13 can be installed between the main buoy 11 and the auxiliary buoy 12. The number and location of cross beams 13 can be adjusted as needed, without affecting the flow of seawater between the main buoy 11 and the auxiliary buoy 12.

[0055] In some embodiments, the cross beam 13 is required to be installed at a height on the main buoy 11 such that the cross beam 13 is always located above the water surface after the offshore power generation device floats on the sea.

[0056] The crossbeam 13 is always located above the water surface and does not affect the flow of water between the main buoy 11 and the auxiliary buoy 12 , thereby increasing the power generation of the tidal energy generator 3 .

[0057] In an embodiment where multiple layers of beams 13 can be provided between the main pontoon 11 and the auxiliary pontoon 12 , the beams 13 are always located above the lowest height above the water surface. The number of layers of beams 13 can be increased according to the installation strength requirements of the main pontoon 11 and the auxiliary pontoon 12 .

[0058] like Figure 1As shown, there is only one crossbeam 13 provided at the upper end of the main buoy 11 , ensuring that the crossbeam 13 is always located above the water surface and does not affect the flow of water between the main buoy 11 and the auxiliary buoy 12 .

[0059] The cross-sectional shape of the beam 13 along the water flow direction, or in other words, the cross-sectional shape of the beam 13 along the direction perpendicular to its own axis, can be polygonal, circular, elliptical, etc.

[0060] Optionally, the side surface of the beam 13 located upstream in the direction of water flow is streamlined (streamlined is an arc shape that can reduce fluid resistance), thereby reducing the resistance of wind passing through the beam 13.

[0061] The crossbeam 13 is made of a material with high strength, good corrosion resistance and toughness to meet the requirements of offshore wind farms. The crossbeam 13 can be made of materials commonly used in the field of offshore wind power technology, and is not specifically limited here.

[0062] There are many ways to connect the main buoy 11 and the auxiliary buoy 12 to the crossbeam 13.

[0063] In some embodiments, the main pontoon 11 and the auxiliary pontoon 12 are connected to the crossbeam 13 by bolts. Specifically, the end of the crossbeam 13 has a connecting plate with a mounting hole, and the connecting plate is fitted with the side walls of the main pontoon 11 and the auxiliary pontoon 12. The bolts pass through the mounting holes of the connecting plate and are sealed and connected to the main pontoon 11 and the auxiliary pontoon 12.

[0064] In some embodiments, the main buoy 11 and the auxiliary buoy 12 are connected to the cross beam 13 by welding. Specifically, metal connectors are provided on the main buoy 11 and the auxiliary buoy 12, and the ends of the cross beam 13 are welded to the metal connectors.

[0065] The connection method of the main buoy 11 and the auxiliary buoy 12 with the cross beam 13 is not limited to the above embodiment, and can also be other connection methods that can achieve stable connection between the main buoy 11 and the auxiliary buoy 12 and the cross beam 13, all of which are within the scope of protection of this application.

[0066] In some embodiments, the tidal energy generator 3 is directly connected to at least one of the main buoy 11 and the auxiliary buoy 12 , and the tidal energy generator 3 is directly installed below the water surface.

[0067] In other embodiments, the tidal energy generator 3 is connected to the beam 13; since the beam 13 is always located above the water surface, in order to ensure that the tidal energy generator 3 can be located below the water surface, in this embodiment, the tidal energy generator 3 is lowered below the water surface through the support column 5.

[0068] The included angle between the support column 5 and the vertical direction is 45°-90°.

[0069] The supporting columns 5 are rigid columns, which reduce the influence of the water flow on the working position of the tidal energy generator 3 .

[0070] The supporting columns 5 and the cross beams 13 are made of the same or different materials.

[0071] The support column 5 and the cross beam 13 may be fixedly connected, that is, the angle between the support column 5 and the cross beam 13 will not change.

[0072] The support column 5 and the cross beam 13 may also be movably connected. Optionally, the support column 5 and the cross beam 13 are hingedly connected so that the support column 5 can swing along the length of the cross beam 13. In this embodiment, a telescopic mechanism (not shown) is provided on the cross beam 13, and the telescopic mechanism is connected to the support column 5.

[0073] Specifically, the telescopic mechanism is installed on the cross beam 13 , and the telescopic mechanism drives the support column 5 to rotate around the hinge position between the support column 5 and the cross beam 13 to achieve the lifting and lowering of the tidal energy generator 3 .

[0074] When the tidal energy generator 3 is in normal working condition, the supporting column 5 is in a vertical state, the tidal energy generator 3 is located below the water surface, and can use the ocean current to generate electricity; when the tidal energy generator 3 needs to be inspected and repaired, the telescopic mechanism can support the supporting column 5 so that the tidal energy generator 3 is above the water surface, which is convenient for the inspection and maintenance of the tidal energy generator 3.

[0075] Optionally, the telescopic mechanism is a telescopic lever.

[0076] Optionally, the tidal current energy generator 3 is a horizontal axis tidal current energy generator.

[0077] In some embodiments, the wind turbines of the tidal energy generator 3 and the wind turbine 2 are located on the same side of the tower 6. The horizontal thrust of the ocean current on the tidal energy generator 3 can be balanced with the horizontal thrust on the upper wind turbine 2, reducing the overturning moment on the floating foundation 1, thereby reducing the inclination angle of the floating wind turbine 2 and improving the power generation performance of the floating wind turbine 2.

[0078] At least one of the main buoy 11 and the auxiliary buoy 12 is a flat cylindrical structure, and the plane with a larger area of ​​the flat cylindrical structure is arranged along the direction of water flow to reduce the resistance of water flow through the floating foundation 1, reduce the tension on the mooring cable 4, and improve the stability and reliability of the offshore power generation device working at sea.

[0079] like Figure 1 As shown, the main buoy 11 and the auxiliary buoy 12 are both rectangular, with the largest surface of the buoy parallel to the direction of the water flow. The end surface with the smallest area of ​​the buoy is the flow-facing surface, thereby minimizing the resistance of the water flow through the floating foundation 1. Optionally, the length of the main buoy 11 along the direction of the water flow is greater than the length of the auxiliary buoy 12.

[0080] The main buoy 11 and the auxiliary buoy 12 are not limited to being rectangular parallelepiped shapes, but may also be cylindrical or triangular prism shapes.

[0081] The main buoy 11 and the auxiliary buoy 12 may be separate cylinders, or may be cylinders composed of a plurality of small cylinders connected in series or in parallel.

[0082] In order to further reduce the resistance of water flowing through the floating foundation 1 , the flow-facing surfaces of the main buoy 11 and the auxiliary buoy 12 are streamlined.

[0083] In order to improve the adaptability of the floating foundation 1 , optionally, at least one of the main buoy 11 and the auxiliary buoy 12 is a cylinder with adjustable ballast.

[0084] Specifically, in the case of severe sea conditions, the ballast of at least one of the main buoy 11 and the auxiliary buoy 12 is increased to increase the overall ballast of the floating foundation 1; in the case of mild sea conditions, the ballast of at least one of the main buoy 11 and the auxiliary buoy 12 is reduced, or even at least one of the main buoy 11 and the auxiliary buoy 12 is left unloaded.

[0085] It should be noted here that the adjustment of the ballast of the floating foundation 1 must be symmetrical.

[0086] Optionally, at least one of the main buoy 11 and the auxiliary buoy 12 is provided with a ballast pump, which is used to inject or discharge ballast medium into the main buoy 11 and the auxiliary buoy 12. Specifically, in severe sea conditions, the ballast pump injects seawater into at least one of the main buoy 11 and the auxiliary buoy 12 to increase the overall ballast of the floating foundation 1; in mild sea conditions, the ballast pump discharges the seawater extracted from at least one of the main buoy 11 and the auxiliary buoy 12, or even empties at least one of the main buoy 11 and the auxiliary buoy 12, to reduce the overall ballast of the floating foundation 1.

[0087] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed, and is not intended to limit the present application. For those skilled in the art, various modifications and variations of the present application are possible. The scope of application involved in the present application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned application concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An offshore power generation device, characterized in that: It includes a floating foundation (1), a wind turbine (2) and a tidal energy generator (3); The floating foundation (1) comprises: A main buoy (11), the tower (6) of the wind turbine (2) is connected to the main buoy (11), and the main buoy (11) is connected to a seabed anchor pile via a mooring cable (4); Auxiliary buoys (12) are symmetrically distributed on both sides of the main buoy (11) along the water flow direction, and the auxiliary buoys (12) are connected to the main buoy (11) via a crossbeam (13); A water flow channel is formed between the main buoy (11) and the auxiliary buoy (12); the tidal energy generator (3) is connected to the floating foundation (1); and the tidal energy generator (3) is located in the water flow channel.

2. The offshore power generation device according to claim 1, characterized in that: The main buoy (11) is connected to the mooring line (4) via a single point mooring; The fan of the wind turbine (2) is a horizontal axis fan.

3. The offshore power generation device according to claim 1, characterized in that: The crossbeam (13) is connected to the upper ends of the main buoy (11) and the auxiliary buoy (12) so that the crossbeam (13) is always located above the water surface.

4. The offshore power generation device according to any one of claims 1 to 3, characterized in that: The tidal energy generator (3) is connected to the crossbeam (13) via a supporting column (5); The upper end of the support column (5) is connected to the crossbeam (13), and the lower end of the support column (5) is connected to the tidal energy generator (3). The tidal energy generator (3) is suspended below the water surface through the support column (5).

5. The offshore power generation device according to claim 4, characterized in that: The upper end of the support column (5) is hingedly connected to the crossbeam (13), and a telescopic mechanism is provided on the crossbeam (13). The telescopic mechanism is used to drive the support column (5) to rotate around the hinged position between the support column (5) and the crossbeam (13) to achieve the lifting and lowering of the tidal energy generator (3).

6. The offshore power generation device according to claim 5, characterized in that: The telescopic mechanism is a telescopic cylinder.

7. The offshore power generation device according to any one of claims 1 to 3, characterized in that: The tidal energy generator (3) and the wind turbine of the wind turbine (2) are located on the same side of the tower (6).

8. The offshore power generation device according to any one of claims 1 to 3, characterized in that: At least one of the main buoy (11) and the auxiliary buoy (12) is in a flat cylindrical structure, and a plane with a larger area of ​​the flat cylindrical structure is arranged along the direction of water flow.

9. The offshore power generation device according to claim 8, characterized in that: The flow-facing surfaces of the main buoy (11) and the auxiliary buoy (12) are streamlined.

10. The offshore power generation device according to claim 1, characterized in that: At least one of the main buoy (11) and the auxiliary buoy (12) is provided with a ballast pump, and the ballast pump is used to inject or discharge ballast medium into or out of the main buoy (11) and the auxiliary buoy (12).

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