Photovoltaic-pendulum wave energy integrated array capable of adjusting floating attitude

Abstract

The invention discloses a photovoltaic-swing type wave energy integrated array capable of adjusting floating postures, and belongs to the technical field of offshore power generation, the photovoltaic-swing type wave energy integrated array comprises a plurality of cuboid floating bodies which are connected in sequence, the top of each floating body is provided with a photovoltaic panel, the adjacent floating bodies are connected through a swing type wave energy device, two liquid tanks which are not communicated are arranged in each floating body, and each liquid tank is provided with a power supply. The liquid tanks of the adjacent floating bodies are connected through water conveying hoses, and the liquid tanks at the two end points of the floating bodies are provided with water pumps; by the adoption of the structure, photovoltaic and the swing type wave energy device are integrated, the photovoltaic panel generates electric energy under the sunlight condition, and meanwhile the swing type wave energy device converts wave energy into electric energy. More stable energy output can be provided, and the defect that photovoltaic power generation cannot be achieved under the sunshine-free condition is overcome through the swing type wave energy device. In addition, dependence on single energy is reduced, the energy utilization efficiency is improved, and the power generation power of the integrated system array is improved.

Description

Technical Field

[0001] The invention relates to the technical field of offshore power generation, and in particular to a photovoltaic-swaying wave energy integrated array with adjustable floating posture. Background Art

[0002] With the growth of global energy demand and the promotion of renewable energy, photovoltaic power stations on land are limited by land resources. Offshore photovoltaics can effectively utilize the vast ocean space and reduce the occupation of land on land, especially in coastal areas where land resources are scarce. Deep sea areas provide more space and reduce competition with offshore areas, such as fishing, shipping and leisure activities. This makes it possible to deploy offshore photovoltaic systems on a large scale. However, compared with offshore areas, deep seas are often affected by bad weather, resulting in violent fluctuations in the sea surface. These extreme sea conditions may cause damage to photovoltaic structures, seriously affecting their power generation efficiency and stability.

[0003] At the same time, due to the higher cost of ocean energy development in the deep sea, the survival ability of individual wave energy devices is relatively low, resulting in higher mooring costs and maintenance and overhaul costs, which restricts the development of deep sea wave energy. Summary of the invention

[0004] The purpose of the present invention is to provide a photovoltaic-pendulum wave energy integrated array with adjustable floating posture, and to provide a photovoltaic-pendulum wave energy integrated system array with adjustable floating posture, which array can generate electricity by synergistically using light energy and wave energy, while reducing the motion response of the integrated system array, improving the overall power generation capacity, and overcoming the problem of poor survivability of individual wave energy devices.

[0005] To achieve the above-mentioned purpose, the present invention provides a photovoltaic-pendulum wave energy integrated array with adjustable floating posture, comprising a plurality of rectangular floats connected in sequence, a photovoltaic panel being arranged on the top of each float, adjacent floats being connected by a pendulum wave energy device, two unconnected liquid tanks being arranged inside each float, the liquid tanks of adjacent floats being connected by a water transfer hose, and water pumps being arranged in the liquid tanks of the floats at the two end points.

[0006] Preferably, the two liquid tanks in the floating body are specifically configured as a left liquid tank and a right liquid tank, the left liquid tank and the right liquid tank in each floating body are connected in sequence through a water supply hose, and the end points of the left liquid tank and the right liquid tank are connected to the water pump.

[0007] Preferably, telescopic rods are fixedly provided at both ends of the floating body, a hose is provided at the other end of the telescopic rod, and adjacent telescopic rods are connected to the pendulum wave energy device via the hose.

[0008] Preferably, the pendulum wave energy device comprises an upper hydraulic cylinder and a lower hydraulic cylinder, a hydraulic energy storage device is provided at the center position of the pendulum wave energy, the upper hydraulic cylinder and the lower hydraulic cylinder are both connected to the hydraulic energy storage device through a connecting tube, a power generation device is provided at the output end of the hydraulic energy storage device, and a PTO device is provided at the bottom of the power generation device through a connecting tube.

[0009] Preferably, the constrained motion equation of the array composed of the above devices in the frequency domain is expressed as:

[0010]

[0011] In the above formula, ω represents the angular frequency of the incident wave, M is the mass of the floating body, and M 水 is the mass of water in the tank; a = a ii and b = b ii is the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies, n=3; b 粘 is the viscosity damping matrix; k 恢复 is the water recovery matrix; k 系泊 is the equivalent mooring force stiffness matrix; b 连接 and k 连接 represent the damping and stiffness coefficients of the connection structure between the floating bodies respectively; ξ is a 1×6n vector of the system motion response; F X is the 6n×1 vector of the wave excitation force acting on the system; f c is the moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; the constraint relationship of the system is expressed in the following matrix form:

[0012] C(X)=[C 1 (X) C 2 (X) C 3 (X) C 4 (X) C 5 (X)] T =0;

[0013] In the above formula, C i (X) For the five degrees of freedom constraints except pitch; C i (X) is the 5×6n linear constraint Jacobian matrix of C(X); C(X) and C i (X) Expressed via multibody dynamics.

[0014] Therefore, the present invention adopts the above-mentioned photovoltaic-swaying wave energy integrated array with adjustable floating posture, which has the following advantages:

[0015] (1) In the present invention, photovoltaics are integrated with pendulum wave energy devices. The photovoltaic panels generate electricity under sunlight conditions, and the pendulum wave energy device converts wave energy into electricity. The advantage of this integrated system is that it can provide more stable energy output. The pendulum wave energy device makes up for the shortcoming that photovoltaics cannot generate electricity under conditions without sunlight. In addition, this system can also reduce dependence on a single energy source, improve energy utilization efficiency, increase the power generation capacity of the integrated system array, and reduce operating costs. Integrating the two can also share power grids, moorings and other facilities, which can effectively reduce production costs and achieve the purpose of reducing costs and increasing efficiency.

[0016] (2) In the present invention, it is innovatively proposed to respectively set two left and right liquid tanks under the photovoltaic float, and adjust the water levels of the left and right liquid tanks by a centrifugal water pump, thereby adjusting the floating posture of the integrated system array. By adjusting the water level difference between the left and right liquid tanks, the photovoltaic angle can be controlled, the photovoltaic array can be kept at the optimal light receiving angle, and the energy conversion efficiency can be improved. By controlling the water intake of the two left and right liquid tanks to be the same, the photovoltaic body can also be submerged and floated, thereby protecting the equipment from bad weather and extreme sea conditions, and increasing the stability and durability of the integrated system array.

[0017] (3) In the present invention, by rationally designing the shape and size of the liquid tank, the sloshing effect can be optimized, and the sloshing of the liquid tank can be used to consume wave energy and reduce the roll of the integrated system. At the same time, a PTO damping system is configured in the pendulum wave energy device. By accurately adjusting the damping coefficient, it can not only efficiently collect wave energy, but also significantly reduce the pitch of the integrated system array, thereby improving the overall stability and reliability of the structure, increasing the service life of the integrated system array, and helping to reduce the cost of maintenance and operation.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a photovoltaic-pendulum wave energy integrated array device capable of adjusting floating posture according to the present invention;

[0020] Figure 2 It is a schematic diagram of a floating body in a photovoltaic-pendulum wave energy integrated array with adjustable floating posture according to the present invention;

[0021] Figure 3 A schematic diagram of a water pump in a photovoltaic-pendulum wave energy integrated array with adjustable floating posture according to the present invention;

[0022] Figure 4 A schematic diagram of a pendulum wave energy device in a photovoltaic-pendulum wave energy integrated array with adjustable floating posture according to the present invention;

[0023] Figure numerals: 1. Photovoltaic panel; 2. Floating body; 3. Water pump; 4. Telescopic rod; 5. Pendulum wave energy device; 6. Water transfer hose; 21. Left liquid tank; 22. Right liquid tank; 51. Hose; 52. Power generation device; 53. Upper hydraulic cylinder; 54. PTO device; 55. Lower hydraulic cylinder; 56. Connecting tube; 57. Hydraulic energy storage device. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. The specific model specifications need to be selected and determined according to the actual specifications of the device, and the specific selection calculation structure adopts the existing technology in the field, so it will not be described in detail.

[0025] Example

[0026] like Figure 1-Figure 4 As shown, the present invention provides a photovoltaic-pendulum wave energy integrated array with adjustable floating posture, including a plurality of rectangular floats 2 connected in sequence, a photovoltaic panel 1 is arranged on the top of each float 2, adjacent floats 2 are connected by a pendulum wave energy device 5, two unconnected liquid tanks are arranged inside each float 2, the liquid tanks of adjacent floats 2 are connected by a water supply hose 6, and the liquid tanks of the floats 2 at the two end points are provided with water pumps 3.

[0027] The two liquid tanks in the float 2 are specifically configured as a left liquid tank 21 and a right liquid tank 22. The left liquid tank 21 and the right liquid tank 22 in each float 2 are connected in sequence through a water hose 6. The end points of the left liquid tank 21 and the right liquid tank 22 are connected to a water pump 3. The water pump 3 is used to adjust the liquid level inside the left liquid tank 21 and the right liquid tank 22, respectively, thereby adjusting the center of gravity of the device.

[0028] Telescopic rods 4 are fixedly provided at both ends of the floating body 2 , and a hose 51 is provided at the other end of the telescopic rod 4 . Adjacent telescopic rods 4 are connected to the pendulum wave energy device 5 via the hose 51 .

[0029] The pendulum wave energy device 5 comprises an upper hydraulic cylinder 53 and a lower hydraulic cylinder 55. A hydraulic energy storage device 57 is arranged at the center of the pendulum wave energy device. Both the upper hydraulic cylinder 53 and the lower hydraulic cylinder 55 are connected to the hydraulic energy storage device 57 through a connecting tube 56. A power generation device 52 is arranged at the output end of the hydraulic energy storage device. A PTO device 54 is arranged at the bottom of the power generation device 52 through a connecting tube 56.

[0030] The constrained motion equation of the array composed of the above devices in the frequency domain is expressed as:

[0031]

[0032] In the above formula, ω represents the angular frequency of the incident wave, M is the mass of the floating body, and M 水 is the mass of water in the tank; a = a ii and b = b ii is the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies, n=3; b 粘 is the viscosity damping matrix; k 恢复 is the water recovery matrix; k 系泊 is the equivalent mooring force stiffness matrix; b 连接 and k 连接 represent the damping and stiffness coefficients of the connection structure between the floating bodies respectively; ξ is a 1×6n vector of the system motion response; F X is the 6n×1 vector of the wave excitation force acting on the system; f c is the moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; the constraint relationship of the system is expressed in the following matrix form:

[0033] C(X)=[C 1 (X) C 2 (X) C 3 (X) C 4 (X) C 5 (X)] T =0;

[0034] In the above formula, C i (X) For the five degrees of freedom constraints except pitch; C i (X) is the 5×6n linear constraint Jacobian matrix of C(X); C(X) and C i (X) Expressed via multibody dynamics.

[0035] The specific use process is as follows: photovoltaic and pendulum wave energy devices are integrated, photovoltaic panels generate electricity under sunshine conditions, and pendulum wave energy devices convert wave energy into electricity, using the complementarity of solar energy and wave energy in time and space distribution to achieve light-wave synergy power generation, provide more stable energy output, and improve the power generation of the integrated system array. In addition, the integration of the two can also share power grids, moorings and other facilities, which can effectively reduce production costs and achieve the purpose of reducing costs and increasing efficiency.

[0036] Two left and right liquid tanks are set at the bottom of the photovoltaic float. The water levels of the left and right liquid tanks are adjusted by water pumps, and then the floating posture of the integrated system array is adjusted. By adjusting the water level difference between the left and right liquid tanks, the photovoltaic angle can be controlled, the photovoltaic array can be kept at the best light receiving angle, and the energy conversion efficiency can be improved. By controlling the water intake of the two left and right liquid tanks to be the same, the photovoltaic body can also be submerged and floated, thereby protecting the equipment from bad weather and extreme sea conditions, and increasing the stability and durability of the integrated system array. By reasonably designing the shape and size of the liquid tank, the sloshing effect can be optimized, and the sloshing of the liquid tank can be used to consume wave energy and reduce the roll of the integrated system.

[0037] The PTO damping system is configured in the pendulum wave energy device. By adjusting the damping coefficient, it can not only collect wave energy efficiently, but also significantly reduce the pitch of the integrated system array, thereby improving the overall stability and reliability of the structure, increasing the service life of the integrated system array, and helping to reduce maintenance and operation costs.

[0038] The retractable connecting rod can adjust the distance between the photovoltaic floats according to the wavelength under the actual sea conditions, which can effectively avoid the resonance and narrow gap resonance between the floats and affect the structural stability. The use of retractable connecting rods ensures that the integrated system array can maintain the best working condition and structural safety under various sea conditions.

[0039] Therefore, the present invention adopts a photovoltaic-pendulum wave energy integrated array with adjustable floating posture, integrates photovoltaic and pendulum wave energy devices, utilizes the complementarity of solar energy and wave energy in time and space distribution, provides more stable energy output, improves energy utilization efficiency, and improves the power generation power of the integrated system array. The water levels of the left and right liquid tanks in the photovoltaic float are adjusted by a centrifugal water pump, thereby adjusting the floating posture of the integrated system array. Not only can the photovoltaic angle be controlled to keep the photovoltaic array at the optimal light receiving angle and improve the energy conversion efficiency, but also the diving and floating of the entire array can be realized, thereby avoiding the equipment from being affected by extreme sea conditions, increasing the stability and durability of the integrated system array, and reducing maintenance costs. By reasonably designing the shape and size of the liquid tank, it is possible to consume wave energy by sloshing in the liquid tank and reduce the roll of the integrated system array. At the same time, a PTO damping system is configured in the pendulum wave energy device. By adjusting the damping coefficient, it is not only possible to efficiently collect wave energy, but also to significantly reduce the pitch of the integrated system array, thereby improving the stability and reliability of the structure. The distance between photovoltaic floats can be adjusted through retractable connecting rods to avoid resonance and narrow gap resonance between the floats, thus ensuring the structural safety of the integrated system array.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A photovoltaic-swaying wave energy integrated array with adjustable floating posture, characterized in that: It includes several rectangular floating bodies connected in sequence, each of which is provided with a photovoltaic panel on the top, and adjacent floating bodies are connected by a pendulum wave energy device. Two unconnected liquid tanks are arranged inside each floating body, and the liquid tanks of adjacent floating bodies are connected by a water hose, and the liquid tanks of the floating bodies at the two end points are provided with water pumps.

2. The photovoltaic-swaying wave energy integrated array with adjustable floating posture according to claim 1 is characterized in that: The two liquid tanks in the floating body are specifically configured as a left liquid tank and a right liquid tank. The left liquid tank and the right liquid tank in each floating body are connected in sequence through a water delivery hose, and the end points of the left liquid tank and the right liquid tank are connected to the water pump.

3. The photovoltaic-swaying wave energy integrated array with adjustable floating posture according to claim 2 is characterized in that: Telescopic rods are fixedly arranged at both ends of the floating body, and a hose is arranged at the other end of the telescopic rod. Adjacent telescopic rods are connected to the pendulum wave energy device through the hose.

4. The photovoltaic-pendulum wave energy integrated array with adjustable floating posture according to claim 3 is characterized by: The pendulum wave energy device comprises an upper hydraulic cylinder and a lower hydraulic cylinder. A hydraulic energy storage device is arranged at the center of the pendulum wave energy device. Both the upper hydraulic cylinder and the lower hydraulic cylinder are connected to the hydraulic energy storage device through a connecting tube. A power generation device is arranged at the output end of the hydraulic energy storage device. A PTO device is arranged at the bottom of the power generation device through a connecting tube.

5. The photovoltaic-pendulum wave energy integrated array with adjustable floating posture according to claim 4 is characterized in that: The constrained motion equation of the array composed of the above devices in the frequency domain is expressed as: In the above formula, ω represents the angular frequency of the incident wave, M is the mass of the floating body, and M 水 is the mass of water in the tank; a = a ii and b = b ii is the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies, n=3; b 粘 is the viscosity damping matrix; k 恢复 is the water recovery matrix; k 系泊 is the equivalent mooring force stiffness matrix; b 连接 and k 连接 represent the damping and stiffness coefficients of the connection structure between the floating bodies respectively; ξ is a 1×6n vector of the system motion response; F X is the 6n×1 vector of the wave excitation force acting on the system; f c is the moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; the constraint relationship of the system is expressed in the following matrix form: C(X)=[C1(X) C2(X) C3(X) C4(X) C5(X)] T =0; In the above formula, C i (X) For the five degrees of freedom constraints except pitch; C i (X) is the 5×6n linear constraint Jacobian matrix of C(X); C(X) and C i (X) Expressed via multibody dynamics.

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