Integrated offshore platform for wave energy and photovoltaic power generation

Abstract

The invention discloses a comprehensive offshore platform for wave energy and photovoltaic integrated power generation, comprising an offshore platform body, a photovoltaic power generation device and a wave energy power generation device; the offshore platform body is a hollow platform composed of multiple floating bodies; the outside of the wave energy power generation device is a buoy, and a coil is arranged inside the buoy; the inside of the wave energy power generation device is a buoy with a rotating magnet and a fixed magnet; the middle of the buoy is provided with a rotating magnet; the bottom of the wave energy power generation device is a float, a push rod is provided on the float, a ball screw is fixedly connected to the push rod, and a rod shaft is provided above the ball screw; the ball screw passes through the bottom of the buoy, and a bearing is provided at the connection between the bottom of the buoy and the ball screw; the rotating magnet is fixed on the rod shaft; the push rod drives the ball screw to drive the rod shaft and the rotating magnet to rotate under the action of waves, and the polarity of the magnetic field generated by the action of the fixed magnet changes, driving the coil to form a current. The invention realizes photovoltaic power generation and wave energy power generation, multi-energy complementation, and improves power generation efficiency.

Description

Technical Field

[0001] The present invention relates to the field of offshore wave energy power generation, and in particular to a comprehensive offshore platform for wave energy and photovoltaic integrated power generation. Background Art

[0002] Photovoltaic power generation technology is one of the most mature renewable energy utilization technologies. However, photovoltaic power generation requires a large amount of land resources. To this end, by developing vast sea areas, floating offshore photovoltaic technology is developed. This technology can effectively save land space, and it is also a clean energy with no pollution emissions, which is in line with the concept of sustainable development. Furthermore, compared with land-based photovoltaics, due to the reflection and scattering effects of the ocean, the irradiation intensity of offshore photovoltaics is usually higher than that of land, so the energy conversion efficiency is higher; the cooling effect of seawater reduces the temperature of photovoltaic panels and improves their performance and life. In short, the development of offshore floating photovoltaics is an important way to optimize the energy structure and promote green and low-carbon development.

[0003] However, the design and construction of offshore photovoltaics also face some challenges, such as the harshness of the marine environment, the safety and economy of equipment, etc. This requires us to continuously develop and apply new technologies while promoting the development of offshore photovoltaics to improve the safety and economy of offshore photovoltaics. At present, offshore floating photovoltaics are still in the development stage. Offshore floating photovoltaics are divided into two categories: conventional surface photovoltaics and offshore platform photovoltaics. However, both photovoltaic configurations have obvious defects. Conventional surface floating photovoltaic technology cannot operate in harsh marine environmental conditions, and conventional offshore platform construction costs are high and cannot be promoted on a large scale in the market.

[0004] At present, there are many types of offshore wave power generation devices, the most typical of which are wave-riding type, oscillating water column type, raft type and oscillating pendulum point absorption type. By converting wave motion into other forms of energy, such as air motion and potential energy difference, the generator inside the device is driven to generate electricity. According to the different water depths of arrangement, wave power generation devices are divided into fixed type and floating type. Floating wave power generation devices adapt to different water depths and sea conditions, are not restricted by the seabed topography, and avoid damage to the marine ecology by flexibly deploying within the sea area and reducing the impact on the seabed environment. In addition, floating wave power generation devices are arranged in offshore waters, and their wave energy density is much higher than that in shallow waters. In other words, floating wave power generation devices can improve the utilization efficiency of wave energy. Therefore, it is urgent to develop a floating wave power generation technology. Summary of the invention

[0005] Purpose of the invention: In view of the shortcomings of the prior art, the present invention proposes an integrated offshore platform for wave energy and photovoltaic integrated power generation. The offshore platform combines both wave energy and photovoltaic power generation, avoiding mutual interference between wave energy power generation devices and photovoltaic power generation devices, making the two power generation methods cooperate with each other, multi-energy complementarity, and improving power generation efficiency; at the same time, it also makes efficient use of the offshore space area.

[0006] Technical solution: The integrated offshore platform for wave energy and photovoltaic integrated power generation of the present invention comprises an offshore platform body, a photovoltaic power generation device and a wave energy power generation device;

[0007] The main body of the offshore platform is a hollow platform composed of multiple floating bodies; connecting ribs are connected in series between the floating bodies;

[0008] Steel frames and steel columns are fixed in the main body of the offshore platform in the horizontal and vertical directions, and the steel frames and steel columns divide the internal space of the main body of the offshore platform into grid areas; the wave energy power generation device is fixed in the grid area; the photovoltaic power generation device is fixed above the grid area;

[0009] The outside of the wave energy power generation device is a buoy, the inside of the buoy is hollow and arranged with coils, and the outside of the buoy is fixedly connected to the steel frame;

[0010] The interior of the wave energy power generation device is a buoy; a rotating magnet is provided in the middle of the buoy; fixed magnets are provided at the upper and lower ends of the buoy; the magnetic poles at both ends of the rotating magnet are opposite to the magnetic poles at both ends of the fixed magnet;

[0011] The bottom of the wave energy power generation device is a float, a push rod is provided on the float, a ball screw is fixedly connected to the push rod, and a rod shaft is provided above the ball screw; the ball screw passes through the bottom of the float, and a bearing is provided at the connection between the bottom of the float and the ball screw;

[0012] The rotating magnet is fixed on the rod shaft; the push rod drives the ball screw to drive the rod shaft and the rotating magnet to rotate under the action of waves;

[0013] The polarity of the magnetic field generated by the rotating magnet and the fixed magnet changes during the rotation process, driving the coil to generate free electrons to form an electric current.

[0014] Connecting ribs are arranged between the wave energy power generation device and the steel frame, thereby fixing the wave energy power generation device on the steel frame.

[0015] The connecting ribs include a steel plate and reinforcing ribs; holes are provided on the steel plate.

[0016] A fixing piece is connected between the push rod and the ball screw.

[0017] The photovoltaic power generation device includes a photovoltaic power generation panel and a bracket. The bracket is fixed on a steel frame. The photovoltaic power generation device generates electricity through the photovoltaic power generation panel.

[0018] The bracket consists of a base and a plurality of rectangular units, and the plurality of rectangular units constitute a plurality of side surfaces and a top surface.

[0019] The rectangular unit is made up of rods, and the rods are provided with slide grooves for installing photovoltaic panels.

[0020] There is a set angle between the rectangular unit and the base, which makes it easy for the photovoltaic panel to be installed on the rectangular unit and absorb solar energy to generate electricity.

[0021] The buoy is a rectangular buoy with a hollow interior.

[0022] The buoy is a columnar buoy.

[0023] Working principle: The main body of the offshore platform of the present invention is composed of multiple floating bodies connected in series through connecting ribs. The internal space of the offshore platform main body is divided into a grid by welding steel frames. Each grid contains a photovoltaic power generation device and a wave power generation device, and then the two different power generation devices are installed in an array on the offshore platform.

[0024] The photovoltaic panels of the photovoltaic power generation device are arranged around and on the top of the bracket. Compared with the traditional arrangement, the number has increased, and the efficiency of the photovoltaic power generation device is increased by absorbing solar energy at different angles. The bracket of the photovoltaic power generation device is made of metal, and the base is welded to the steel frame of the offshore platform. The shape of the photovoltaic power generation device is trapezoidal. A slide is set in the bracket where the photovoltaic panels are placed, and the slide is used to replace the photovoltaic panels.

[0025] The wave energy power generation device is welded in the grid inside the offshore platform. In order to strengthen the connection between the wave energy power generation device and the platform and resist some severe sea conditions at sea, connecting ribs are arranged between the wave energy power generation device and the steel frame. The connecting ribs are riveted to fix the wave energy power generation device and the steel frame again.

[0026] The wave energy power generation device has a rectangular buoy on the outside and a pontoon on the inside, with a float at the bottom that moves up and down with the waves; a certain number of coils are arranged inside the buoy, and a rotating magnet is arranged inside the buoy. The rotating magnet forms a magnetic field, and the rotation of the rotating magnet itself will cause the magnetic poles of the magnetic field to constantly alternate, and the fixed magnet and the rotating magnet interact with each other to form a bistable state.

[0027] A push rod is provided on the upper part of the float, and the push rod is fixedly connected to the ball screw and the rod shaft, converting the longitudinal movement of the float into the rotational movement of the internal rod shaft, thereby driving the rotating magnet to rotate.

[0028] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0029] (1) The wave energy below the photovoltaic power generation panel of the present invention is absorbed by the wave power generation device, which prevents the waves from hitting the photovoltaic panel and ensures safety when operating in severe sea conditions.

[0030] (2) The photovoltaic power generation device and the wave energy power generation device of the present invention are integrated into one, avoiding the use of a connecting structure and ensuring stability when operating in severe sea conditions.

[0031] (3) The present invention combines wave energy power generation with photovoltaic power generation, making full use of the space on the offshore platform. At the same time, the combination of the two power generation methods increases the efficiency of the entire device in absorbing and converting energy and improves its economic efficiency. It is safe, stable and economical.

[0032] (4) The photovoltaic power generation device and the wave energy power generation device of the present invention are arranged in an array, which reduces the cost for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an isometric structural schematic diagram of a comprehensive offshore platform for wave energy and photovoltaic integrated power generation according to the present invention;

[0034] Figure 2 It is a schematic diagram of the structural arrangement of the integrated offshore platform of the present invention;

[0035] Figure 3 It is a schematic diagram of the top view of the structure of the integrated offshore platform of the present invention without a photovoltaic power generation device;

[0036] Figure 4 It is a schematic diagram of the cross-sectional structure of the integrated offshore platform of the present invention;

[0037] Figure 5 It is a schematic diagram of the structure of the connecting ribs of the integrated offshore platform of the present invention;

[0038] Figure 6 A schematic diagram of the support structure of the photovoltaic power generation device of the present invention;

[0039] Figure 7 It is a schematic structural diagram of the wave energy power generation device of the present invention;

[0040] Figure 8 is an internal cross-sectional view of the wave energy power generation device of the present invention;

[0041] Fig. 9 It is a schematic diagram of the partial internal structure of the wave energy power generation device of the present invention;

[0042] Fig.10 It is a schematic diagram of the internal magnet arrangement of the wave energy power generation device of the present invention. DETAILED DESCRIPTION

[0043] like Figure 1 and Figure 2 As shown, the integrated offshore platform for wave energy and photovoltaic integrated power generation of the present invention includes an offshore platform body, a photovoltaic power generation device 1 and a wave energy power generation device 3 .

[0044] The main body of the offshore platform is composed of multiple buoys 5, which are connected in series through first connecting ribs 8. The first connecting ribs 8 pass through the buoys 5 to form an internally hollow platform on the sea surface. The entire offshore platform body is fixed with anchor chains and connected to anchors on the seabed below.

[0045] like Figure 3 As shown, the interior of the offshore platform body is hollow, and steel frames 6 and steel columns 7 are welded horizontally and vertically in the internal space of the offshore platform body. The steel frames 6 and steel columns 7 divide the internal space of the entire offshore platform into grid areas. A bracket 2 of a photovoltaic power generation device is welded on the top of each grid of the grid area, and a wave energy power generation device 3 is arranged in the grid.

[0046] like Figure 4 As shown, the steel frame 6 and the steel column 7 are arranged alternately to form a grid, and the wave energy power generation device 3 is welded to the steel frame 6 in the grid. In order to strengthen the connection between the wave energy power generation device 3 and the offshore platform body and resist some severe sea conditions at sea, a second connecting rib 4 is arranged between the wave energy power generation device 3 and the steel frame 6. In this embodiment, the second connecting rib 4 fixes the wave energy power generation device 3 by riveting. The second connecting rib 4 includes two steel plates 4-1, a reinforcing rib 4-2 and a rivet hole 4-3.

[0047] The photovoltaic power generation device 1 is arranged on the top of the offshore platform body, and the wave power generation device 3 is arranged at the bottom of the offshore platform body. The lower end of the wave power generation device 3 contacts the seawater to absorb wave energy, while the photovoltaic power generation device 1 is arranged at the upper part to reduce the impact caused by waves.

[0048] The photovoltaic power generation device 1 generates electricity by absorbing solar energy through photovoltaic panels. The photovoltaic panels are placed on a bracket 2 at a set angle. Multiple photovoltaic panels are placed on the bracket 2 to increase the efficiency of solar power generation.

[0049] like Figure 6 As shown, the bracket 2 of the photovoltaic power generation device 1, the bottom of the bracket 2 is welded to the steel frame 6 inside the offshore platform, and the bracket 2 is welded to the upper part of each divided grid inside the offshore platform space. The bracket 2 includes a base and a plurality of rectangular units. The rectangular unit is spliced ​​by rods 2-1, and a slide groove 2-2 is provided on the rod 2-1. The photovoltaic power generation panel is inserted into the slide groove 2-2. There is a set angle between the rectangular unit and the steel frame 6.

[0050] In this embodiment, the bracket 2 is composed of four side surfaces and a top surface composed of rectangular units. Photovoltaic panels are placed on the four side surfaces and the top surface of the bracket 2. A slide 2-2 is prefabricated on the rod 2-1 on which the photovoltaic panels are placed. The photovoltaic panels are nested on the bracket 2 along the slide 2-2. The slide 2-2 is used to replace the photovoltaic panels and fix the photovoltaic panels on the bracket 2, which provides convenience for maintenance.

[0051] The wave energy power generation device 3 includes an inner buoy 3-1, an outer buoy 3-2, a rod shaft 3-3, a float 3-4, a rotating magnet 3-5, a push rod 3-6, a ball screw 3-7, a coil 3-8, a fixed magnet 3-9 and a bearing 3-10.

[0052] In this embodiment, the outside of the wave energy power generation device 3 is a rectangular outer buoy 3-2, the inside of the outer buoy 3-2 is hollow, so as to facilitate the arrangement of the coil 3-8. The outside of the outer buoy 3-2 is fixedly connected to the steel frame 6, and the connection with the steel frame 6 is strengthened by the second connecting rib 4.

[0053] The interior of the wave energy power generation device 3 is a columnar inner buoy 3-1, and the interior of the inner buoy 3-1 is a rotating magnet 3-5, which is fixed to the rod shaft 3-3 and fixedly connected to the ball screw 3-7 below. The rotating magnet 3-5 and the rod shaft 3-3 inside the inner buoy 3-1 rotate with the rotation of the ball screw 3-7. The rod shaft 3-3 inside the inner buoy 3-1 is connected to the rotating magnet 3-5, and the upper and lower ends of the buoy are connected to the fixed magnet 3-9. The rotating magnet 3-5 and the fixed magnet 3-9 are divided into left and right parts with opposite poles. The left end magnetic pole of the fixed magnet 3-9 at the upper and lower ends of the inner buoy 3-1 is opposite to the left end magnetic pole of the rotating magnet 3-5.

[0054] like Fig.10 As shown, one end of the fixed magnet 3-9 is an S pole and the other end is an N pole, which is opposite to the magnetic pole of the rotating magnet 3-5. When the magnetic poles of the rotating magnet 3-5 and the fixed magnet 3-9 are the same, a restoring torque is generated, and the system is in an unstable equilibrium state. When the magnetic poles of the rotating magnet 3-5 and the fixed magnet 3-9 are opposite, the system is in a stable equilibrium state, thereby achieving a bistable state.

[0055] The bottom of the wave energy power generation device 3 is a float 3-4, such as Fig. 9As shown, the push rod 3-6 is fixedly connected to the float 3-4, and the push rod 3-6 is rigidly connected to the ball screw 3-7 by bolts 3-11. The float 3-4 oscillates up and down with the waves and transmits it to the push rod 3-6, and the push rod 3-6 converts the up and down oscillation into a bidirectional rotation of the ball screw 3-7. Since the bottom of the inner buoy 3-1 and the connection between the ball screw 3-7 are provided with bearings 3-10, the ball screw 3-7 only drives the internal rod shaft 3-3 to rotate, thereby further driving the internal rotating magnet 3-5 to rotate. The internal rotating magnet 3-5 forms a bistable state with the fixed magnet 3-9, because the upper and lower ends of the buoy are connected to the fixed magnet 3-9, and the rotating magnet 3-5 is located in the middle position and the left and right magnetic poles are opposite to the left and right magnetic poles of the fixed magnet 3-9 at the upper and lower ends. When the internal rotating magnet 3-5 rotates so that the left and right poles are the same as the poles of the fixed magnet 3-9, the system is in an unstable equilibrium state, and a repulsive force, i.e., a restoring torque, is generated between the two magnets to restore it to a stable equilibrium state. When the left and right poles of the rotating magnet 3-5 are the same as the poles of the fixed magnets 3-9 at the upper and lower ends during the rotation process, the system is in a stable equilibrium state. At the same time, the rotating magnet 3-5 also forms a magnetic field inside the device, because the ball screw 3-7 converts the energy of the float's up and down oscillation into a two-way rotation and transmits it to the internal rotating magnet 3-5 through the rod shaft 3-3. At the same time, the process of the system recovering from an unstable equilibrium state to a stable equilibrium state will also cause the internal rotating magnet 3-5 to rotate, thereby causing the polarity of the magnetic field to change continuously, and the N pole and S pole of the magnetic field will alternately pass through the closed coil 3-8 inside the inner buoy 3-1. The coil 3-8 will generate free electrons and form an electric current because it senses the change in the magnetic field, thereby completing the conversion of wave energy-mechanical energy-electrical energy.

Claims

1. A comprehensive offshore platform for wave energy and photovoltaic integrated power generation, characterized by: It comprises an offshore platform body, a photovoltaic power generation device (1) and a wave energy power generation device (3); The offshore platform body is a hollow platform composed of a plurality of floating bodies (5); first connecting ribs (8) are connected in series between the floating bodies (5); Steel frames (6) and steel columns (7) are fixed in the offshore platform body in the transverse and longitudinal directions, and the steel frames (6) and steel columns (7) divide the internal space of the offshore platform body into grid areas; the wave energy power generation device (3) is fixed in the grid area; and the photovoltaic power generation device (1) is fixed above the grid area; The outside of the wave energy power generation device (3) is an outer buoy (3-2), the interior of the outer buoy (3-2) is hollow and is provided with a coil (3-8), and the outside of the outer buoy (3-2) is fixedly connected to a steel frame (6); The interior of the wave energy power generation device (3) is an inner buoy (3-1); a rotating magnet (3-5) is provided in the middle of the inner buoy (3-1); fixed magnets (3-9) are provided at the upper and lower ends of the inner buoy (3-1); the magnetic poles at both ends of the rotating magnet (3-5) are opposite to the magnetic poles at both ends of the fixed magnet (3-9); The bottom of the wave energy power generation device (3) is a float (3-4), the float (3-4) is provided with a push rod (3-6), the push rod (3-6) is fixedly connected with a ball screw (3-7), and a rod shaft (3-3) is provided above the ball screw (3-7); the ball screw (3-7) passes through the bottom of the inner buoy (3-1), and a bearing (3-10) is provided at the connection between the bottom of the inner buoy (3-1) and the ball screw (3-7); The rotating magnet (3-5) is fixed on the rod shaft (3-3); the push rod (3-6) drives the ball screw (3-7) under the action of waves to drive the rod shaft (3-3) and the rotating magnet (3-5) to rotate; The polarity of the magnetic field generated by the rotating magnet (3-5) and the fixed magnet (3-9) during the rotation process changes, driving the coil (3-8) to generate free electrons to form an electric current.

2. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 1, characterized in that: A second connecting rib (4) is provided between the wave energy power generation device (3) and the steel frame (6).

3. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 2 is characterized by: The second connecting rib (4) comprises a steel plate (4-1) and a reinforcing rib (4-2); a hole (4-3) is provided on the steel plate (4-1).

4. The integrated offshore platform for wave energy and photovoltaic power generation according to claim 1, characterized in that: A fixing piece is connected between the push rod (3-6) and the ball screw (3-7).

5. The integrated offshore platform for wave energy and photovoltaic power generation according to claim 1 is characterized by: The photovoltaic power generation device (1) comprises a photovoltaic power generation panel and a bracket (2), and the bracket (2) is fixed on the steel frame (6).

6. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 5 is characterized by: The support (2) consists of a base and a plurality of rectangular units.

7. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 6, characterized in that: The rectangular unit is formed by splicing rods (2-1), and the rods (2-1) are provided with sliding grooves (2-2) for installing photovoltaic panels.

8. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 6, characterized in that: There is a set angle between the rectangular unit and the base.

9. The integrated offshore platform for wave energy and photovoltaic power generation according to claim 1, characterized in that: The outer buoy (3-2) is a rectangular buoy with a hollow interior.

10. The integrated offshore platform for wave energy and photovoltaic integrated power generation according to claim 1, characterized in that: The inner buoy (3-1) is a columnar buoy.

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