Multi-energy complementary integrated device based on wind energy, wave energy and solar energy

Abstract

The invention discloses a multi-energy complementary integrated device based on wind energy, wave energy and solar energy, and belongs to the technical field of offshore power generation, the multi-energy complementary integrated device comprises a semi-submersible platform, a fan is arranged in the center of the semi-submersible platform, a photovoltaic panel is arranged on the upper plane of the semi-submersible platform, and a wave energy device is arranged in the semi-submersible platform; the bottom surface of the semi-submersible platform is connected with a photovoltaic array, the photovoltaic array comprises photovoltaic floating bodies, photovoltaic panels are arranged on the top surfaces of the photovoltaic floating bodies, and the photovoltaic floating bodies are connected through a swing type wave energy device. By the adoption of the structure, complementarity of solar energy and wave energy in space-time distribution can be complementarily utilized, multi-energy power generation output peak-valley staggered compensation is achieved, the overall output stability of the integrated system is improved, the rectification difficulty is reduced, multi-energy complementation is achieved, and the power generation power of the multi-energy integrated system can be effectively improved. Meanwhile, the self-storage capacity of the system can be improved, and the service cycle is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore power generation, and in particular to a multi-energy complementary integrated device based on wind energy, wave energy and solar energy. Background Art

[0002] With the development trend of ocean energy towards the deep sea, there are many problems with the existing floating wind turbines, wave energy devices and photovoltaic devices. For example, the oscillating float wave energy power generation device has weak working stability, the floating wind turbine platform has strong motion response, and the modular floating photovoltaic is fragile and easy to be damaged. At the same time, due to the huge cost of laying submarine cables, the cost of offshore photovoltaics, offshore wind power and wave power generation remains high, which restricts the development of offshore renewable energy. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-energy complementary integrated device based on wind energy, wave energy and solar energy, which can complementarily utilize the complementarity of solar energy and wave energy in time and space distribution, so as to compensate for the peak and valley of multi-energy power generation output, improve the overall output stability of the integrated system, reduce the difficulty of rectification, and effectively improve the power generation of the multi-energy integrated system. At the same time, it can also improve the self-storage capacity of the system and extend the service life.

[0004] To achieve the above-mentioned purpose, the present invention provides a multi-energy complementary integrated device based on wind energy-wave energy-solar energy, including a semi-submersible platform, a wind turbine is arranged in the center of the semi-submersible platform, a photovoltaic panel is arranged on the upper plane of the semi-submersible platform, a wave energy device is arranged inside the semi-submersible platform, and a photovoltaic array is connected to the bottom surface of the semi-submersible platform, the photovoltaic array includes a photovoltaic floating body, a photovoltaic panel is arranged on the top surface of the photovoltaic floating body, and the photovoltaic floating bodies are connected by a pendulum wave energy device.

[0005] Preferably, the wave energy device includes a cylindrical outer shell, a sliding rod is arranged in the center of the outer shell, and a counterweight block and a permanent magnet linear motor are arranged on the sliding rod in sequence from top to bottom. The counterweight block is connected to the top of the inner side of the outer shell through a spring, and limit switches are arranged at both ends of the sliding rod.

[0006] Preferably, the top of the photovoltaic floating body is arranged as an inclined surface, and the inclined direction is toward the light-receiving surface.

[0007] Preferably, the pendulum wave energy device includes a plurality of hydraulic push rods arranged on a photovoltaic float, the pendulum wave energy device includes an upper hydraulic cylinder, a hydraulic energy storage device, a lower hydraulic cylinder, and a limit buffer, and the plurality of hydraulic push rods are respectively connected to the upper hydraulic cylinder and the lower hydraulic cylinder, and during wave movement, the hydraulic push rods push the upper hydraulic cylinder and the lower hydraulic cylinder to store energy.

[0008] Preferably, the motion equation of the multi-resonance system in the semi-submersible platform is:

[0009]

[0010] Where M is the mass of the new wave energy device, m is the mass of the counterweight, and A is the additional mass. is the acceleration of the counterweight, is the acceleration of the shell, F 水 is the force on the shell in water, F PTO is the force between the PTO system and the housing;

[0011] The wave energy device captures wave energy through the instantaneous wave power generated by the heaving motion of the beam and the shell of the wave energy device. The energy capture equation is:

[0012]

[0013] in: and are the heaving speeds of the beam and the wave energy device, b PTO is the damping coefficient;

[0014] For the photovoltaic array, the constrained motion equation of the multi-floating photovoltaic system in the frequency domain is expressed as:

[0015]

[0016] Where: 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 moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; represents the transpose of the constraint matrix, i represents the imaginary unit, C X represents the constraint matrix;

[0017] The constraint relationship of the system is expressed in the following matrix form:

[0018] C(X)=[C1(X) C2(X) C3(X) C4(X) C5(X)] T =0

[0019] Where: 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 through multibody dynamics;

[0020] The damping coefficient of the pendulum wave energy articulated system is assumed to be linear output power damping, and the PTO control torque of linear damping is expressed as:

[0021]

[0022] Where: Δθ and is the angular displacement and velocity of two adjacent floating bodies connected by a hinge connector. When the stiffness coefficient is 0, the PTO system will only attenuate the response without moving the resonant frequency of the structure. The PTO force is expressed in the following form:

[0023]

[0024] Therefore, the present invention adopts the above-mentioned multi-energy complementary integrated device based on wind energy, wave energy and solar energy, which has the following advantages:

[0025] (1) In the present invention, it is innovatively proposed to place a wave energy device inside the side column of the floating wind turbine platform, which can effectively reduce the motion response of the semi-submersible platform under the combined action of wind and waves and improve the stability of wind turbine power generation. When the platform motion response is small, the wave energy device can provide control power for the wind turbine and provide energy supplement for the integrated system, thereby improving the power generation efficiency of the integrated system. At the same time, the wave energy device will also be protected by the platform side column to improve its survival rate, which can effectively reduce the operation and maintenance costs.

[0026] (2) In the present invention, the complementarity of solar energy and wave energy in time and space distribution is utilized to achieve staggered compensation of peaks and valleys in the multi-energy power generation output, improve the overall output stability of the integrated system, reduce the difficulty of rectification, and 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.

[0027] (3) In the present invention, the "three-in-one" 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-time sea maintenance, and facilitate the control and management of production, construction, and maintenance, thus achieving the comprehensive goal of reducing costs and increasing efficiency.

[0028] (4) In the present invention, the connection device of the photovoltaic array in the light-wave integrated system is innovatively replaced with a pendulum wave energy device. This device can not only capture wave energy, but also the optimized connection system combined with appropriate damping can effectively suppress the movement of photovoltaic modules under the multi-floating body model, thereby improving the overall stability of the structure, achieving the effect of "killing two birds with one stone".

[0029] (5) In the present invention, the proposed light-wave integrated system only has a float and a pendulum wave energy device, which is simple to produce and transport, and the float is easily connected and easy to disassemble. If damage occurs, a single component can be replaced, which can effectively reduce maintenance and repair costs.

[0030] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a multi-energy complementary integrated device based on wind energy, wave energy and solar energy according to the present invention;

[0032] Figure 2 It is a schematic diagram of a semi-submersible platform in a multi-energy complementary integrated device based on wind energy, wave energy and solar energy of the present invention;

[0033] Figure 3 It is a schematic diagram of a wave energy device in a multi-energy complementary integrated device based on wind energy, wave energy and solar energy of the present invention;

[0034] Figure 4 A schematic diagram of a photovoltaic array in a multi-energy complementary integrated device based on wind energy, wave energy and solar energy according to the present invention;

[0035] Figure 5 It is a schematic diagram of a pendulum wave energy device in a multi-energy complementary integrated device based on wind energy, wave energy and solar energy of the present invention;

[0036] Figure numerals: 1. wind and wave integrated device; 11. semi-submersible platform; 12. wind turbine; 13. wave energy device; 2. photovoltaic array; 21. photovoltaic float; 22. photovoltaic panel; 23. pendulum wave energy device; 231. hydraulic energy storage device; 232. upper hydraulic cylinder; 233. limit buffer; 234. lower hydraulic cylinder. DETAILED DESCRIPTION

[0037] 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.

[0038] Example

[0039] like Figure 1-Figure 5 As shown, the present invention provides a multi-energy complementary integrated device based on wind energy-wave energy-solar energy, including a semi-submersible platform 11, a wind turbine 12 is arranged in the center of the semi-submersible platform 11, a photovoltaic panel 22 is arranged on the upper plane of the semi-submersible platform 11, a wave energy device 13 is arranged inside the semi-submersible platform, the bottom surface of the semi-submersible platform 11 is connected to a photovoltaic array 2, the photovoltaic array 2 includes a photovoltaic float 21, the top surface of the photovoltaic float 21 is provided with a photovoltaic panel 22, and the photovoltaic floats 21 are connected by a pendulum wave energy device 23.

[0040] The wave energy device 13 includes a cylindrical shell with a sliding rod arranged in the center of the shell. The sliding rod is provided with a counterweight and a permanent magnet linear motor in sequence from top to bottom. The counterweight is connected to the top of the inner side of the shell through a spring, and limiters are arranged at both ends of the sliding rod.

[0041] The top of the photovoltaic floating body 21 is set as an inclined surface, and the inclined direction is toward the light-receiving surface.

[0042] The pendulum wave energy device 23 includes a plurality of hydraulic push rods arranged on the photovoltaic floating body 21. The pendulum wave energy device 23 includes an upper hydraulic cylinder 232, a hydraulic energy storage device 231, a lower hydraulic cylinder 234, and a limit buffer 233. The plurality of hydraulic push rods are respectively connected to the upper hydraulic cylinder 232 and the lower hydraulic cylinder 234. During the wave movement, the hydraulic push rods push the upper hydraulic cylinder 232 and the lower hydraulic cylinder 234 to store energy.

[0043] In a semi-submersible platform, the motion equation of the multi-resonance system is:

[0044]

[0045] Where M is the mass of the new wave energy device, m is the mass of the counterweight, and A is the additional mass. is the acceleration of the counterweight, is the acceleration of the shell, F 水 is the force on the shell in water, F PTO is the force between the PTO system and the housing;

[0046] The wave energy device captures wave energy through the instantaneous wave power generated by the heaving motion of the beam and the shell of the wave energy device. The energy capture equation is:

[0047]

[0048] in: and are the heaving speeds of the beam and the wave energy device, b PTO is the damping coefficient;

[0049] For the photovoltaic array, the constrained motion equation of the multi-floating photovoltaic system in the frequency domain is expressed as:

[0050]

[0051] Where: 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 moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; represents the transpose of the constraint matrix, i represents the imaginary unit, C X represents the constraint matrix;

[0052] The constraint relationship of the system is expressed in the following matrix form:

[0053] C(X)=[C1(X) C2(X) C3(X) C4(X) C5(X)] T =0

[0054] Where: 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 through multibody dynamics;

[0055] The damping coefficient of the pendulum wave energy articulated system is assumed to be linear output power damping, and the PTO control torque of linear damping is expressed as:

[0056]

[0057] Where: Δθ and is the angular displacement and velocity of two adjacent floating bodies connected by a hinge connector. When the stiffness coefficient is 0, the PTO system will only attenuate the response without moving the resonant frequency of the structure. The PTO force is expressed in the following form:

[0058]

[0059] In the specific use process, the wind-light-wave multi-energy integrated device is divided into several identical units. Each unit takes the semi-submersible platform as the center, and the light-wave integrated array is distributed around it. The wind turbine absorbs wind energy through the blades and converts it into electrical energy. The waves accompanying the wind hit the semi-submersible platform, and the wave energy is absorbed and converted into electrical energy by the heaving wave energy device installed in the pile of the semi-submersible platform. It can not only reduce the wave load on the wind turbine, reduce the heaving movement amplitude of the wind turbine, and protect the wind turbine, but also absorb the wave energy to generate electricity, thereby improving the power generation efficiency of the wind and wave system. At the same time, the heaving device is restricted and protected by the pile of the semi-submersible platform, and its survivability is improved. The photovoltaic array arranged around the wind and wave collection device absorbs light energy through photovoltaic panels and converts it into electrical energy. The pendulum wave device installed between the arrays can absorb waves to generate electricity, thereby improving the power generation efficiency of the light-wave system, while reducing the vertical movement amplitude of the photovoltaic array and improving the hydrodynamic stability of the photovoltaic panel. The wind-wave-solar energy multi-energy complementary integrated system can complementarily utilize offshore wind energy, solar energy and wave energy to achieve multi-energy peak-valley staggered smooth power transmission.

[0060] Therefore, the present invention adopts a multi-energy complementary integrated device based on wind energy, wave energy and solar energy, and utilizes the complementarity of solar energy and wave energy in time and space distribution to achieve peak-valley staggered compensation of multi-energy power generation output, improve the overall output stability of the integrated system, reduce the difficulty of rectification, and effectively improve the power generation of the multi-energy integrated system. At the same time, it can also improve the self-storage capacity of the system and extend the service life.

[0061] 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 multi-energy complementary integrated device based on wind energy, wave energy and solar energy, characterized by: It comprises a semi-submersible platform, wherein a wind turbine is arranged in the center of the semi-submersible platform, a photovoltaic panel is arranged on the upper plane of the semi-submersible platform, a wave energy device is arranged inside the semi-submersible platform, a photovoltaic array is connected to the bottom surface of the semi-submersible platform, the photovoltaic array comprises a photovoltaic floating body, a photovoltaic panel is arranged on the top surface of the photovoltaic floating body, and the photovoltaic floating bodies are connected via a pendulum wave energy device.

2. According to claim 1, a multi-energy complementary integrated device based on wind energy, wave energy and solar energy is characterized by: The wave energy device includes a cylindrical shell, a sliding rod is arranged in the center of the shell, and a counterweight block and a permanent magnet linear motor are arranged on the sliding rod in sequence from top to bottom. The counterweight block is connected to the top of the inner side of the shell through a spring, and limiters are arranged at both ends of the sliding rod.

3. The multi-energy complementary integrated device based on wind energy, wave energy and solar energy according to claim 2 is characterized in that: The top of the photovoltaic floating body is arranged as an inclined surface, and the inclined direction faces the light receiving surface.

4. The multi-energy complementary integrated device based on wind energy, wave energy and solar energy according to claim 3 is characterized by: The pendulum wave energy device includes a plurality of hydraulic push rods arranged on a photovoltaic floating body, the pendulum wave energy device includes an upper hydraulic cylinder, a hydraulic energy storage device, a lower hydraulic cylinder, and a limit buffer. The plurality of hydraulic push rods are respectively connected to the upper hydraulic cylinder and the lower hydraulic cylinder. During wave movement, the hydraulic push rods push the upper hydraulic cylinder and the lower hydraulic cylinder to store energy.

5. The multi-energy complementary integrated device based on wind energy, wave energy and solar energy according to claim 4 is characterized in that: The motion equation of the multi-resonance system in the semi-submersible platform is: Where M is the mass of the new wave energy device, m is the mass of the counterweight, and A is the additional mass. is the acceleration of the counterweight, is the acceleration of the shell, F 水 is the force on the shell in water, F PTO is the force between the PTO system and the housing; The wave energy device captures wave energy through the instantaneous wave power generated by the heaving motion of the beam and the shell of the wave energy device. The energy capture equation is: in: and are the heaving speeds of the beam and the wave energy device, b PTO is the damping coefficient; For the photovoltaic array, the constrained motion equation of the multi-floating photovoltaic system in the frequency domain is expressed as: Where: 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 moment generated by the constraints between the floating bodies, which is a 5n×1 matrix; represents the transpose of the constraint matrix, i represents the imaginary unit, C X represents the constraint 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 Where: 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 through multibody dynamics; The damping coefficient of the pendulum wave energy articulated system is assumed to be linear output power damping, and the PTO control torque of linear damping is expressed as: Where: Δθ and is the angular displacement and velocity of two adjacent floating bodies connected by a hinge connector. When the stiffness coefficient is 0, the PTO system will only attenuate the response without moving the resonant frequency of the structure. The PTO force is expressed in the following form:

Images