Modular photovoltaic-pendulum wave energy integration device

Abstract

The invention discloses a modular photovoltaic-pendulum wave energy integration device, and belongs to the technical field of offshore power generation. Comprising a plurality of buoyancy tanks which are connected in sequence, a plurality of hydraulic supporting legs are arranged on the buoyancy tanks, photovoltaic panels are arranged on the hydraulic supporting legs, and a swing type wave energy power generation device is arranged between the buoyancy tanks through connecting rods; the swing type wave energy device comprises a plurality of hydraulic cylinders connected with the tail end of the connecting rod, the hydraulic cylinders are sequentially connected with a hydraulic cylinder energy storage device, a power generation device and a PTO device through connecting pipes, and the hydraulic energy storage device is arranged in the center of the interior of the swing type wave energy device. The PTO device is connected with the power generation device through a connecting cylinder. By the adoption of the structure, light energy and wave energy can be utilized at the same time for power generation, and through the arrangement of the wave energy device, efficient energy utilization is achieved while the motion response of a photovoltaic carrier is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of offshore power generation, and in particular to a modular photovoltaic-pendulum wave energy integrated device. Background Art

[0002] With the development trend of ocean energy towards the deep sea, there are many problems with the existing wave energy devices and photovoltaic devices. For example, due to the complex offshore environment, there are often strong winds and waves, which cause the sea surface to be in a state of violent fluctuations. The wave action will cause the photovoltaic and wave energy devices to pitch and roll significantly, seriously affecting their power generation efficiency and stability. At the same time, the high cost of offshore photovoltaic and wave energy generation further restricts their development. Therefore, a photovoltaic-pendulum wave energy integrated system that can reduce costs, increase efficiency and improve stability is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a modular photovoltaic-pendulum wave energy integrated device that can simultaneously utilize light energy and wave energy to generate electricity, and through the setting of the wave energy device, reduce the motion response of the photovoltaic carrier while achieving efficient energy utilization.

[0004] To achieve the above-mentioned object, the present invention provides a modular photovoltaic-pendulum wave energy integrated device, comprising a plurality of pontoons connected in sequence, a plurality of hydraulic support legs are arranged on the pontoons, photovoltaic panels are arranged on the hydraulic support legs, and pendulum wave energy power generation devices are rotatably connected between the pontoons through connecting rods;

[0005] The pendulum wave energy device comprises a plurality of hydraulic cylinders connected to the end of the connecting rod, wherein the plurality of hydraulic cylinders are sequentially connected to a hydraulic cylinder energy storage device, a power generation device and a PTO device through connecting pipes, wherein the hydraulic energy storage device is arranged at the inner center of the pendulum wave energy device, and the PTO device is connected to the power generation device through a connecting tube.

[0006] Preferably, the connecting rod specifically includes a connecting tube, a telescopic joint and a hose which are connected in sequence, and the other end of the hose is connected to the hydraulic cylinder.

[0007] Preferably, hydraulic oil is provided in the hydraulic cylinder, and the power generation device is provided with a turbine and a generator.

[0008] Preferably, the constrained motion equation of the multi-floating photovoltaic system in the frequency domain is as follows:

[0009]

[0010] In the above formula: ω represents the angular frequency of the incident wave; a = a jj and b = b jjis the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies; b vis is the viscosity damping matrix; k r is the water recovery matrix; k m is the equivalent mooring force stiffness matrix; b hinge and k hinge represent the damping and stiffness coefficients respectively; ξ is a 1×6n vector of the system motion response; F ex is the 6n×1 vector of the wave excitation force acting on the system; f L 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:

[0011] C(X)=[C1(X) C2(X) C3(X) C4(X) C5(X)] T =0;

[0012] 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.

[0013] Therefore, the present invention adopts the above-mentioned modular photovoltaic-pendulum wave energy integrated device, which has the following advantages:

[0014] (1) The present invention utilizes the complementarity of solar energy and wave energy in terms of temporal and spatial distribution, so that the multi-energy power generation output peaks and valleys are staggered and compensated, improving the overall output stability of the integrated system, reducing the difficulty of rectification, and multi-energy complementarity, which can effectively improve the power generation of the multi-energy integrated system. At the same time, it can also improve the self-sustaining capacity of the system and extend the service life

[0015] (2) In the present invention, the proposed device can be combined with an integrated system to share infrastructure such as power grids and moorings, which can effectively reduce production costs; at the same time, it can also share operation and maintenance, improve the efficiency of single sea maintenance, facilitate the control and management of production, construction, and maintenance, and achieve the comprehensive purpose of reducing costs and increasing efficiency.

[0016] (3) A PTO damping device is configured in the pendulum wave energy device of the present invention, and appropriate PTO damping can be configured for the wave energy device. While capturing wave energy, the movement of photovoltaic modules under the multi-floating body model can be effectively suppressed, thereby improving the overall stability of the structure, achieving the effect of "killing two birds with one stone".

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a modular photovoltaic-pendulum wave energy integrated device of the present invention;

[0019] Figure 2 It is a schematic diagram of the interior of a modular photovoltaic-pendulum wave energy integrated device of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a connecting rod in a modular photovoltaic-pendulum wave energy integration device of the present invention;

[0021] Figure 4 A diagram showing the connection between a connecting rod and a pendulum wave energy device in a modular photovoltaic-pendulum wave energy integrated device of the present invention;

[0022] Figure 5 It is a side view of the connection structure between the connecting rod and the pendulum wave energy device in a modular photovoltaic-pendulum wave energy integrated device of the present invention;

[0023] Figure numerals: 1. buoyancy box; 2. photovoltaic panel; 3. hydraulic support leg; 4. pendulum wave energy device; 41. hydraulic cylinder; 42. hydraulic energy storage device; 43. power generation device; 44. PTO device; 45. connecting cylinder; 5. connecting rod. 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 5 As shown, the present invention provides a modular photovoltaic-pendulum wave energy integrated device, comprising a plurality of pontoons 1 connected in sequence, a plurality of hydraulic support legs 3 are arranged on the pontoons 1, photovoltaic panels 2 are arranged on the hydraulic support legs 3, and pendulum wave energy devices 4 are arranged between the pontoons 1 through connecting rods 5; the photovoltaic panels 2 are supported on the pontoons 1 through the hydraulic support legs 3, and the four corners of the photovoltaic panels 2 are fixed to the hydraulic support legs 3. The height of the hydraulic support legs 3 can be adjusted in advance according to the actual local sea conditions, climate and other factors, thereby changing the height and angle of the photovoltaic panels 2 to keep the photovoltaic array at the best light receiving angle. At the same time, the pendulum wave energy device 4 captures wave energy to achieve light-wave combined power generation.

[0027] The connecting rod specifically includes a connecting tube, a telescopic joint and a hose connected in sequence, the other end of the hose is connected to the hydraulic cylinder, and the main function of the hose is to increase the working range of the hydraulic cylinder, that is, to act as a spring. When the hydraulic cylinder is pulled outward, through the coordinated action of the hose, the hydraulic cylinder will have a greater force when compressing the liquid; the pendulum wave energy device 4 includes a plurality of hydraulic cylinders 41 connected to the end of the connecting rod 5, and the plurality of hydraulic cylinders 41 are connected to the hydraulic cylinder 41 energy storage device, the power generation device 43 and the PTO device 44 in sequence through the connecting pipe, the hydraulic energy storage device 42 is arranged at the inner center of the pendulum wave energy device 4, and the PTO device 44 is connected to the power generation device 43 through the connecting tube 45;

[0028] Hydraulic oil is provided in the hydraulic cylinder 41, and the power generation device 43 is provided as a turbine and a generator. When the waves rise, the piston in the hydraulic cylinder 41 is pushed, and the hydraulic oil in the hydraulic energy storage device 42 is compressed to store energy; when the waves fall, the piston retreats, and the hydraulic oil flows back, releasing energy, and converting the pressure energy of the hydraulic oil in the hydraulic energy storage device 42 into mechanical energy, and the rotor of the generator is driven to rotate through the turbine in the power generation device 43, and the generator generates electrical energy by the rotation of the rotor, thereby realizing the conversion of hydraulic energy into electrical energy, and driving the power generation device 43 to generate electricity.

[0029] By setting the PTO device 44, the internal stiffness and damping of the system can be preset according to the actual sea conditions to adapt to the movement under the actual sea conditions and enhance the stability of the device;

[0030] The constrained motion equation of the multi-floating photovoltaic system in the frequency domain is as follows:

[0031]

[0032] In the above formula: ω represents the angular frequency of the incident wave; a = a jj and b = b jj is the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies; b vis is the viscosity damping matrix; k r is the water recovery matrix; k m is the equivalent mooring force stiffness matrix; b hinge and k hinge represent the damping and stiffness coefficients of the articulated connector, respectively; ξ is a 1×6n vector of the system motion response; F ex is the 6n×1 vector of the wave excitation force acting on the system; f L is the torque generated by the constraints between the floating bodies, which is a 5n×1 matrix; the constraint relationship of the system can be expressed in the following matrix form:

[0033] C(X)=[C1(X) C2(X) C3(X) C4(X) C5(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] Therefore, the present invention adopts a modular photovoltaic-pendulum wave energy integrated device, which utilizes the complementarity of solar energy and wave energy in time and space distribution, so that the multi-energy power generation output peak and valley are staggered and compensated, the overall output stability of the integrated system is improved, the rectification difficulty is reduced, and the multi-energy complementarity can effectively improve the power generation of the multi-energy integrated system. At the same time, it can also improve the self-sustaining capacity of the system and extend the service life; the joint integrated system can share infrastructure such as power grids and moorings, which can effectively reduce production costs; at the same time, it can also share operation and maintenance, improve the efficiency of single sea maintenance, facilitate the control and management of production, construction, and maintenance, and achieve the comprehensive purpose of reducing costs and increasing efficiency; and through the system, the wave energy device is configured with appropriate damping, while capturing wave energy, it can effectively suppress the movement of photovoltaic modules under the multi-floating model, thereby improving the overall stability of the structure, achieving the effect of "killing two birds with one stone"; the connection structure of the present invention adopts a telescopic connection structure, which can not only increase the movement amplitude of the hydraulic cylinder piston barrel in the pendulum wave energy device, but also adjust the spacing between photovoltaic floats according to the actual wavelength, so as to avoid mutual resonance of the floats or hydrodynamic resonance of the fluid between the floats, which affects the structural stability.

[0036] 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 modular photovoltaic-sway wave energy integrated device, characterized in that: It comprises a plurality of pontoons connected in sequence, wherein a plurality of hydraulic support legs are arranged on the pontoons, photovoltaic panels are arranged on the hydraulic support legs, and pendulum wave energy power generation devices are rotatably connected between the pontoons through connecting rods; The pendulum wave energy device comprises a plurality of hydraulic cylinders connected to the end of the connecting rod, wherein the plurality of hydraulic cylinders are sequentially connected to a hydraulic cylinder energy storage device, a power generation device and a PTO device through connecting pipes, wherein the hydraulic energy storage device is arranged at the inner center of the pendulum wave energy device, and the PTO device is connected to the power generation device through a connecting tube.

2. A modular photovoltaic-pendulum wave energy integrated device according to claim 1, characterized in that: The connecting rod specifically includes a connecting tube, a telescopic joint and a hose which are connected in sequence, and the other end of the hose is connected to the hydraulic cylinder.

3. A modular photovoltaic-pendulum wave energy integrated device according to claim 2, characterized in that: The hydraulic cylinder is provided with hydraulic oil, and the power generation device is provided with a turbine and a generator.

4. A modular photovoltaic-pendulum wave energy integrated device according to claim 3, characterized in that: The constrained motion equation of the multi-floating photovoltaic system in the frequency domain is as follows: In the above formula: ω represents the angular frequency of the incident wave; a = a jj and b = b jj is the 6n×6n additional mass matrix and radiation damping matrix; n is the total number of floating bodies; b vis is the viscosity damping matrix; k r is the water recovery matrix; k m is the equivalent mooring force stiffness matrix; b hinge and k hinge represent the damping and stiffness coefficients respectively; ξ is a 1×6n vector of the system motion response; F ex is the 6n×1 vector of the wave excitation force acting on the system; f L is the moment generated by the constraints between the floating bodies, which is a 5 n ×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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