A single-column floating offshore integrated power platform

Abstract

The present invention provides a single-column floating offshore integrated power platform, including a single-column float; the single-column float is connected to the tower of an offshore wind turbine, and a control system is arranged in the tower; the single-column float has two hollow-connected upper and lower parts, the upper part is hollow to set a wave energy power generation system, and the lower part is externally connected to a mooring system and a balancing system; the balancing system includes a plurality of fins and a plurality of anti-roll fins, and the fins and anti-roll fins are evenly arranged on the outer wall of the lower part of the single-column float; the fins are vertically hinged to the outer wall of the lower part; the anti-roll fins are located outside the single-column float, and each of the anti-roll fins is hinged with a connecting rod, and the connecting rod enters the interior of the lower part of the single-column float through a hole on the side of the float, and the connecting rod is hinged to a disc, and the disc rotates around the center of the circle. Because the oscillating water column wave energy power generation device of the present invention has a damping effect, under the same wave height environment, the stability of the present invention is stronger than that of a general single-column floating wind power platform.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power and ocean wave energy power generation, and in particular to a single-column floating offshore integrated power platform. Background Art

[0002] Offshore wind farms are located in sea areas with concentrated wind resources and high wind speeds. Because waves themselves come from wind power, offshore wind farms are also places where wave energy resources are rich. Combining the development of offshore wind power with the utilization of wave energy resources can effectively expand the power generation capacity of offshore power plants and improve the overall economic efficiency of offshore power plants.

[0003] Offshore wind turbines with floating foundations can utilize wind and wave resources in deeper waters. Among them, single-column floating offshore wind turbines have a simple structure and are easy to manufacture and maintain. However, the floating foundation is easily affected by waves, and design and engineering measures need to be taken to enhance its stability. Secondly, compared with other floating offshore wind power platforms, single-column floating wind turbines do not have a platform structure to balance the torque of wave impact. In principle, they are more like tumblers. Although they are not easily overturned by wind and waves, they swing a lot and are more unstable. Summary of the invention

[0004] In order to improve the stability and comprehensive utilization efficiency of single-column floating offshore wind turbines, the purpose of the present invention is to provide a single-column floating offshore integrated power platform, which can not only meet the demand for offshore wind power, but also use nearby wave energy to generate electricity. In addition, since the oscillating water column wave energy power generation device has a damping effect, under the same wave height environment, the stability of the present invention is stronger than that of a general single-column floating wind power platform.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A single-column floating offshore integrated power device, comprising an offshore wind turbine and a single-column float, a wave energy power generation system, an external mooring system, a control system and a balancing system;

[0007] The single-column float is connected to the tower of the offshore wind turbine, and the control system is arranged in the tower; the control system is electrically connected to the wave energy power generation system and the offshore wind turbine; the single-column float has two hollow-connected upper and lower parts, the upper part is hollow to arrange the wave energy power generation system, and the lower part is externally connected to the mooring system and the balance system;

[0008] The balancing system comprises a plurality of fins and a plurality of anti-roll fins, the fins and the anti-roll fins are evenly arranged on the outer wall of the lower part of the single-column float; the fins are vertically hinged to the outer wall of the lower part;

[0009] Each of the anti-roll fins is hinged with a connecting rod, which enters the lower part of the single-column float through an opening on the side of the float. The connecting rod is hinged with a disk, and the disk rotates around the center of the circle.

[0010] Optionally, the anti-roll fin is a rectangular sheet, the vertical cross section of which is an ellipse, and the main body surface of the anti-roll fin is perpendicular to the axial direction of the single-column float.

[0011] Optionally, the plurality of anti-roll fins are located on the same horizontal plane outside the single-column float.

[0012] Optionally, the wing is a quadrilateral structure, one side of the quadrilateral structure is hinged to the outer wall of the lower part of the single-column float, and the minimum acute angle of the quadrilateral structure is set on the outer side of the lower end.

[0013] Optionally, the wave energy power generation device is an oscillating wave energy power generation device.

[0014] Optionally, the oscillating wave energy power generation device includes a cavity, an air inlet and outlet, an upper air pipe, a lower air pipe, a one-way valve, a turbine and a generator; the cavity is divided into an upper and lower part by the water surface, the cavity gradually narrows upward from the middle, the top of the cavity is connected with the air inlet and outlet, the air inlet and outlet are connected with the upper air pipe and the lower air pipe respectively, a turbine is arranged between the upper air pipe and the lower air pipe, the gas in the upper air pipe and the lower air pipe is converted into reciprocating motion to drive the turbine to rotate in the same direction, the upper air pipe and the lower air pipe are both provided with one-way valves, and the turbine is connected to the generator through a rotating shaft.

[0015] Optionally, the control system includes a computer, a control board, a turbine, a generator, an inverter and a power grid. The computer controls the turbine and the generator through the control board, and the current of the generator is connected to the power grid through the inverter.

[0016] Optionally, the single-column float is a cylindrical float.

[0017] Optionally, the fin is arranged between the fin stabilizer and the external mooring system.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The present invention combines offshore wind power with a wave power generation device, and the bottom end of the wind turbine tower is connected to a floater, which is both the foundation of a floating offshore wind turbine and the container of a wave power generation device. With this combined design, the overall construction cost is less than that required for the separate construction of the two power generation devices, thereby reducing the construction cost. In particular, by combining a balancing system with a power generation system, the oscillating water column wave power generation device performs damping motion under the action of waves, which can absorb the impact of waves on the device. Under the same wave height, the offshore platform with the device is more stable than a general single-column floating offshore platform.

[0020] Furthermore, compared with traditional wave power generation devices, the oscillating water column wave power generation device has a very simple structure. The main equipment is placed in the tower above the sea surface, which has low requirements for sealing and corrosion protection and is easy to maintain. Although the total power of the wave power generation device is small, it can meet the power demand of the device itself, thus reducing the cost of later operation and maintenance and electricity consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the upper structure of a single-column float.

[0024] Figure 3 This is a schematic diagram of the lower structure of a single-column float.

[0025] Figure 4 It is a schematic diagram of the structure of an oscillating water column wave energy power generation device.

[0026] Figure 5 Schematic diagram of the oscillating water column wave energy power generation process.

[0027] Figure 6 This is a schematic diagram of the control system of a single-column floating offshore integrated power platform.

[0028] Figure 7 This is the front view of the fin stabilizer;

[0029] Figure 8 This is the side view of the fin stabilizer;

[0030] Fig. 9 Schematic diagram of the connection status of the damper. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 3As shown, the present invention is a single-column floating offshore integrated power platform, comprising an offshore wind turbine 1, a single-column float 2, a wave energy power generation system 3, a mooring device 4, a control system 5 and a balance system 6. The offshore wind turbine 1 is connected to the single-column float 2, the offshore wind turbine is arranged at the upper end of the platform, the tower of the wind turbine 1 is concentric with the single-column float 2, and the bottom of the tower can be used to arrange the wave energy power generation system 3, the control system 5 and other necessary facilities.

[0033] Among them, the single-column float 2 is a cylinder, divided into two parts, the upper and lower parts, which are hollowed out and connected. Seawater can freely enter and exit the hollow part. The lower part of the float is used to provide buoyancy and maintain balance, and the upper part is hollow and can be used as a cavity for an oscillating water column wave energy power generation device. The single-column float 2 has a mooring system 4 outside to connect to the seabed.

[0034] In order to adapt to the working conditions of the single-column platform, the wave energy power generation system 3 adopts the oscillating water column principle, using the waves to drive the water level in the cavity to vibrate up and down. When the single-column float 2 floats on the sea, the still water level is in the middle of the upper part of the float 2. The waves can stimulate the water surface to oscillate up and down continuously. The changing water surface can force the air in the cavity 3-1 to reciprocate. The air blows the turbine 3-6 to drive the wave energy generator 3-7 to generate electricity. The electricity generated by wind and wave energy can be stored by the energy storage device in the device, or it can be sent to the power grid together.

[0035] Reference Figure 4 and Figure 5 A single-column floating offshore integrated power platform includes an offshore wind power device composed of an offshore wind turbine 1 and a single-column float 2. The single-column float 2 consists of an upper and a lower part.

[0036] Reference Figure 4The oscillating water column wave energy power generation device 3 includes a cavity 3-1, an air inlet and outlet 3-2, an upper air pipe 3-3, a lower air pipe 3-4, a one-way valve 3-5, a turbine 3-6 and a generator 3-7. There is a concentric cylindrical cavity 3-1 inside the float 2, a part of the cavity 3-1 is above the water surface, and the other part is below the water surface, and there is an air inlet and outlet 3-2 at the top. The air inlet and outlet 3-2 are connected to the air pipe, and the valve 3-5 in the air pipe can only be opened in one direction. The upper gas is only allowed to flow from left to right, and the lower gas is only allowed to flow from right to left. When the gas flows, it can drive the turbine 3-6 to rotate, thereby driving the generator 3-7 to rotate and generate electricity. Waves can stimulate the water surface inside the cavity 3-1 to oscillate up and down with the waves. When the water surface moves upward, the gas above the cavity 3-1 is squeezed by the water surface and blown out from the air inlet and outlet 3-2. Under the restriction of valve 3-5, it can only flow from the upper air pipe; when the water surface moves downward, the air pressure above the cavity 3-1 decreases, and the external gas is blown into the air inlet and outlet 3-2 through the lower pipe under the action of atmospheric pressure. Under the restriction of valve 3-5, it can only flow from the lower air pipe. That is, the reciprocating motion of the airflow is converted into the unidirectional rotation of the turbine 3-6. In this way, whether it is air intake or air outlet, the turbine 3-6 keeps rotating in the same direction, ensuring the continuous and unidirectional operation of the generator 3-7.

[0037] The cavity 3-1 is divided into two parts, upper and lower, by the water surface. The cavity 3-1 gradually narrows upward from the middle to increase the gas flow rate. The air inlet and outlet 3-2 at the top are connected to the air pipe. A turbine 3-6 is provided between the upper and lower air pipes. The gas in the air pipe can blow the turbine 3-6 to rotate. The turbine 3-6 is connected to the generator 3-7 through a rotating shaft.

[0038] The oscillating water column wave energy combined power generation device adopts a design mode of cooperating upper and lower air pipes and a one-way valve 3-5 to convert the reciprocating motion of the airflow into the same-direction rotation of the turbine 3-6, making full use of the energy of the airflow and having a simple structure.

[0039] Reference Figure 5 When wave energy generation is not needed temporarily, the control system 5 can control the turbine 3-6 and the generator 3-7 to be disconnected, and control the turbine 3-6 and the generator 3-7 to be connected when the wave energy part is needed to work.

[0040] Reference Figure 6 The control system 5 can be installed inside the wind power tower, and is composed of a computer and an inverter. The computer sends instructions to the control board through the internally installed control program. After receiving the instructions, the board can control the opening and closing of the connection between the turbine 3-6 and the generator 3-7.

[0041] Specifically, the control system 5 includes a computer 10, a control board 11, a turbine 12 (turbine 3-6), a generator 13 (generator 3-7), an inverter 14 and a power grid 15. The computer 10 controls the turbine 12 and the generator 13 through the control board 11, and the current of the generator 13 is connected to the power grid through the inverter 14 and the power grid 15.

[0042] The means of realizing the functions of the control program are widely used in automatic control. The requirements can be met by slightly changing the mature products. The control board can use mature products such as those of NI, which only requires a small amount of cost. The inverter can directly use the power equipment necessary for wind turbine grid connection, such as the electric control cabinet, without a lot of construction.

[0043] The generated electric energy is transmitted after being converted into direct current by an inverter under the coordination of the control system 5. It can also be stored by an energy storage system.

[0044] Reference Figure 1 The single-column float 2 has an anchor chain of a mooring system 4 outside to anchor the entire device.

[0045] Reference Figure 3 and Figures 7 to 9 The balancing system 6 includes fins 6-6 and anti-roll fins 6-1, which are installed around the lower end float to reduce the roll of the entire platform and maintain and appropriately strengthen the pitch. This design can enhance the stability of the platform, increase the oscillation amplitude of wave energy generation, and improve the power generation.

[0046] The single-column float 2 is a cylindrical float with good balance, stability and light weight. The oscillating wave energy power generation device inside the float 2 has a simple structure, the main working equipment is located on the sea surface, and it is sealed and has low anti-corrosion cost.

[0047] The control system 5 can utilize the existing automatic control program and the mature regulation and transmission system in wind power to invert and adjust the power generated by the device, without adding a large number of equipment, and is easy to construct. The control system 5 can command the wave energy power generation device to start and stop at any time.

[0048] The wave energy power generation device 3 also provides damping for the entire platform, reducing the platform's sway amplitude and increasing stability. The lower end float uses anti-roll fins 6-1 and fins 6-6 to enhance the stability of the platform. The anti-roll fin 6-1 uses a design that simulates a fish fin, and uses a damper 6-5 to reduce the sway amplitude of the entire platform.

[0049] The fin surface of the anti-roll fin 6-1 is located outside the float, and its shape is similar to a shark fin, swinging in the sea. There is a connecting rod 6-2 on the side close to the float. The connecting rod 6-2 enters the lower end of the float through an opening 6-3 on the side of the float and is connected to a disc 6-4. A damper 6-5 connects the disc 6-4 and the inner wall of the float.

[0050] Preferably, the stabilizer fin 6-1 is a rectangular sheet with an elliptical vertical cross section (e.g. Figure 7 The main body surface of the anti-roll fin 6-1 is perpendicular to the axial direction of the single-column float 2.

[0051] Preferably, the plurality of anti-roll fins 6-1 are located on the same horizontal plane outside the single-column float 2, and each anti-roll fin 6-1 is connected to a disc 6-4 via a damper 6-5, and the plurality of discs 6-4 rotate around their respective centers of circles inside the single-column float 2. When subjected to external force, the anti-roll fin 6-1 drives the damper 6-5, and the damper drives the disc 6-4 to rotate, eliminating the external force, thereby achieving system balance.

[0052] Preferably, the wing 6 - 6 is a quadrilateral structure, one side of the quadrilateral structure is hinged to the outer wall of the lower part of the single-column float 2, and the minimum acute angle of the quadrilateral structure is set on the outer side of the lower end.

[0053] When the anti-roll fin 6-1 swings, the disc 6-4 rotates accordingly, and the push-pull damper 6-5 continuously performs reciprocating damping motion. During the motion, the damper 6-5 consumes mechanical energy to achieve the effect of maintaining the stability of the platform.

[0054] The present invention has the following advantages:

[0055] 1. Combining offshore wind power with wave power generation devices, sharing a single-column floating offshore platform, the overall power generation capacity is high, increasing the power generation and effective working hours.

[0056] 2. Offshore wind power is combined with wave energy power generation devices. The bottom of the wind turbine tower is connected to a float. The float is both the foundation of the floating offshore wind turbine and the container of the wave energy power generation device. With this combined design, the overall construction cost is less than the cost of building two power generation devices separately, reducing the construction cost.

[0057] 3. Compared with traditional wave power generation devices, the oscillating water column wave power generation device has a very simple structure. The main equipment is placed in the tower above the sea surface, which has low requirements for sealing and corrosion protection and is easy to maintain. Although the total power of the wave power generation device is small, it can meet the power demand of the device itself. Therefore, the later operation and maintenance and electricity costs are reduced.

[0058] 4. Compared with fixed-foundation offshore wind turbines or wave power generation devices, floating-based offshore integrated power platforms have a wider range of applications and can make full use of marine wind and wave energy resources in near and far seas.

[0059] 5. The balancing system 6 is combined with the power generation system. The oscillating water column wave energy power generation device performs damping motion under the action of the waves, which can absorb the impact of the waves on the device. Under the same wave height, the offshore platform with the device is more stable than the general single-column floating offshore platform.

[0060] All articles and references disclosed above, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates embodiments that are essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional.

[0061] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0062] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A single-column floating offshore integrated power platform, characterized in that: It comprises an offshore wind turbine (1) and a single-column float (2), a wave energy power generation device (3), an external mooring system (4), a control system (5) and a balancing system (6); The single-column float (2) is connected to the tower of the offshore wind turbine (1), and the control system (5) is arranged inside the tower; the control system (5) is electrically connected to the wave energy power generation device (3) and the offshore wind turbine (1); the single-column float (2) comprises upper and lower parts which are hollowed out and connected, the upper part is hollow for arranging the wave energy power generation device (3), and the lower part is externally connected to the mooring system (4) and the balancing system (6); The balancing system (6) comprises a plurality of fins (6-6) and a plurality of anti-roll fins (6-1), the fins (6-6) and the anti-roll fins (6-1) being evenly arranged on the lower outer wall of the single-column float (2); the fins (6-6) are vertically hinged to the lower outer wall; Each of the anti-roll fins (6-1) is hingedly connected to a connecting rod (6-2), the connecting rod (6-2) enters the lower part of the single-column float (2) through an opening (6-3) on the side of the float, the connecting rod (6-2) is hingedly connected to a disk (6-4), and the disk (6-4) rotates around the center of a circle; The single-column float (2) is a cylindrical float; The fin (6-6) is arranged between the fin stabilizer (6-1) and the external mooring system (4).

2. A single-column floating offshore integrated power platform according to claim 1, characterized in that: The anti-roll fin (6-1) is a rectangular sheet material, and its vertical cross section is elliptical; the main body surface of the anti-roll fin (6-1) is perpendicular to the axial direction of the single-column float (2).

3. A single-column floating offshore integrated power platform according to claim 1, characterized in that: The plurality of anti-roll fins (6-1) are located on the same horizontal plane outside the single-column float (2).

4. A single-column floating offshore integrated power platform according to claim 1, characterized in that: The wing (6-6) is a quadrilateral structure, one side of the quadrilateral structure is hinged to the outer wall of the lower part of the single-column float (2), and the smallest acute angle of the quadrilateral structure is arranged on the outer side of the lower end.

5. The single-column floating offshore integrated power platform according to claim 1, characterized in that: The wave energy power generation device (3) is an oscillating wave energy power generation device.

6. A single-column floating offshore integrated power platform according to claim 5, characterized in that: The oscillating wave energy power generation device comprises a cavity (3-1), an air inlet and outlet (3-2), an upper air pipe (3-3), a lower air pipe (3-4), a one-way valve (3-5), a turbine (3-6) and a generator (3-7); the cavity (3-1) is divided into an upper and lower part by the water surface; the cavity (3-1) gradually narrows upward from the middle; the top of the cavity (3-1) is connected to the air inlet and outlet (3-2); the air inlet and outlet (3-2) are respectively connected to the upper air pipe (3-3) and the lower air pipe (3-4); a turbine (3-6) is provided between the upper air pipe (3-3) and the lower air pipe (3-4); the gas in the upper air pipe (3-3) and the lower air pipe (3-4) is converted into reciprocating motion to drive the turbine (3-6) to rotate in the same direction; the upper air pipe (3-3) and the lower air pipe (3-4) are both provided with a one-way valve (3-5); and the turbine (3-6) is connected to the generator (3-7) via a rotating shaft.

7. A single-column floating offshore integrated power platform according to claim 6, characterized in that: The control system (5) comprises a computer (10), a control board (11), a turbine (3-6), a generator (3-7), an inverter (14) and a power grid (15); the computer (10) controls the turbine (3-6) and the generator (3-7) via the control board (11); and the current of the generator is connected to the power grid (15) via the inverter (14).

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