Double-floating-body wave power generation test device

Abstract

The invention discloses a double-floating-body wave energy power generation test device, and the device comprises a supporting system which is used for restraining the vertical displacement and heaving motion of a wave energy device, so as to improve the coaxiality of the floating bodies of the wave energy device; the wave energy capturing system is used for generating relative movement to capture wave energy; the control system is used for measuring the motion response of the wave energy capturing system so as to control the linear motor to adjust the wave energy device, and energy maximization is achieved; the control system comprises a laser displacement sensor, an S-shaped tension and compression sensor and an acceleration sensor which are arranged in a matched mode.

Description

Technical Field:

[0001] The present invention relates to a double-float wave energy power generation test device. Background Art:

[0002] Wave energy is a kind of marine renewable energy with large reserves, wide distribution, high energy density and long duration. Developing and utilizing wave energy resources helps to solve problems such as environmental pollution and greenhouse effect, and is also beneficial to improving the energy structure and ensuring the safe and stable supply of energy.

[0003] In order to make full use of wave energy, it is necessary to set up a wave energy power generation device to convert wave energy into utilizable electric energy; and as the core of converting wave energy into utilizable electric energy, wave energy devices have been widely studied. Among them, the double-float oscillating float wave energy device has been popularized and applied due to its advantages such as simple structure and convenient deep-sea deployment.

[0004] Due to the too low survival ability and wave energy conversion efficiency of the double-float oscillating float wave energy device under severe sea conditions, it is usually necessary to conduct a pool power generation test of a scaled-down model during the preliminary research and development process. However, since the current wave energy equipment does not form a unified structural form, it is difficult to have universality; at the same time, the existing power generation test device lacks a corresponding universal energy conversion system, so the control strategy of the wave energy device cannot be effectively verified. Summary of the Invention:

[0005] The embodiment of the present invention provides a double-float wave energy power generation test device with reasonable structural design. Based on the mutual cooperation of multiple functional components, the vertical displacement between the float and the buoy and the damping plate is restricted by a guide rod, which ensures the coaxiality of the floating body and avoids damage to the energy conversion system. At the same time, the guide rod is connected to the float, the buoy and the damping plate through linear bearings, which is convenient for disassembly and assembly and subsequent multi-degree-of-freedom tests and mooring tests. A linear generator is used to replace the energy conversion system, which is easy to implement various control strategies and also retains the installation interface for the subsequent energy conversion system to realize the whole process simulation from wave energy to electric energy, solving the problems existing in the prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A double-float wave energy power generation test device, the power generation test device includes:

[0008] A support system, which is used to restrict the vertical displacement and heaving motion of the wave energy device to improve the coaxiality of the floating body of the wave energy device;

[0009] A wave energy capture system, which is used to generate relative motion to capture wave energy;

[0010] A control system, which is used to measure the motion response of a wave energy capture system to control a linear motor to adjust a wave energy device to achieve maximum energy; the control system includes a laser displacement sensor, an S-type tension and compression sensor, and an acceleration sensor that are cooperatively arranged.

[0011] The support system includes multiple guide rods, a support platform, and a fixed support. The guide rods, the support platform, and the fixed support are connected into a whole through linear bearings, which is convenient for disassembly and removal to conduct six-degree-of-freedom tests on the wave energy device and mooring system tests; the linear bearings ensure the smoothness of the connection and avoid the generation of excessive damping force.

[0012] The guide rod is connected to the support platform through a U-shaped buckle, and the U-shaped buckle is tightly fixed on the support platform; the guide rod is fixed to the fixed support by welding.

[0013] The wave energy capture system includes a float, a buoy, and a damping plate that are cooperatively arranged to cause relative motion between the float, the buoy, and the damping plate to capture wave energy.

[0014] A cage is provided inside the buoy. The cage is fixed to the damping plate by bolts and is provided with a waterproof gasket to prevent water seepage. It is connected to the bottom for easy disassembly and installation, which is convenient for the maintenance of the linear motor and the installation and debugging of the subsequent energy conversion system.

[0015] The linear motor is connected to the buoy through a cage. The cage includes an end cover, a motor support, a cage support, and a support ring; the end cover is connected to the mover of the linear motor through a linear bearing, and both ends of the mover of the linear motor are constrained by vertical motion, which ensures the perpendicularity of the mover and avoids motion deviation caused by tangential force.

[0016] The linear motor is connected to the cage through motor support bolts; the cage is connected to the buoy through support ring bolts.

[0017] The support platform is fixed to the laser displacement sensor by welding to simultaneously measure the displacement changes of the float and the buoy. When conducting an optimized float test, the disassembly and installation of the laser displacement sensor can be avoided, and the range and accuracy of the laser displacement sensor can be adjusted up and down.

[0018] The S-type tension and compression sensor is arranged between the cage and the mover of the linear motor and can accurately measure the control force to verify the performance of various control strategies.

[0019] The energy conversion system and the control system of the wave energy device are integrated. The power generation efficiency of the system is calculated by the relative speed of the linear motor control force and the wave energy power generation device to evaluate the energy capture performance of the wave energy power generation device, avoiding the installation of subsequent equipment such as generators. At the same time, the linear motor has a fast response speed and simple control, and can well verify the implementation of various control strategies.

[0020] With the above structure, the present invention restricts the vertical displacement and heaving motion of the wave energy device through the support system to improve the coaxiality of the floating body of the wave energy device; the six-degree-of-freedom test and mooring system test of the wave energy device are carried out by connecting the guide rod, the support platform and the fixed support as a whole with linear bearings; the relative motion is generated by the float, the buoy and the damping plate of the wave energy capture system to capture wave energy; the motion response of the wave energy capture system is measured by the control system to control the linear motor to adjust the wave energy device to achieve maximum energy, which has the advantages of simple structure and low cost. Description of the drawings:

[0021] Figure 1 It is a schematic structural diagram of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the cage of the present invention.

[0023] In the figure, 1. Guide rod; 2. Laser displacement sensor; 3. Linear motor; 4. Float; 5. Buoy; 6. Damping plate; 7. Fixed support; 8. Acceleration sensor; 9. S-type tension and compression sensor; 10. Support platform; 11. End cover; 12. Motor support; 13. Cage support; 14. Support ring. Detailed implementation manners:

[0024] To clearly illustrate the technical features of the present solution, the present invention will be elaborated in detail below through specific implementation manners and in conjunction with its drawings.

[0025] As Figure 1-2 shown in

[0026] a support system, which is used to restrict the vertical displacement and heaving motion of the wave energy device to improve the coaxiality of the floating body of the wave energy device;

[0027] a wave energy capture system, which is used to generate relative motion to capture wave energy;

[0028] A control system, which is used to measure the motion response of a wave energy capture system to control a linear motor to adjust a wave energy device and achieve maximum energy; the control system includes a laser displacement sensor 2, an S-type tension and compression sensor 9, and an acceleration sensor 8 which are cooperatively arranged.

[0029] The support system includes multiple guide rods 1, a support platform 10, and a fixed support 7. The guide rods 1, the support platform 10, and the fixed support 7 are connected into a whole through linear bearings, which is convenient for disassembly and removal to conduct six-degree-of-freedom tests on the wave energy device and mooring system tests; the linear bearings ensure the smoothness of the connection and avoid the generation of excessive damping force.

[0030] The guide rod 1 is connected to the support platform 10 through a U-shaped buckle, and the U-shaped buckle is tightly fixed on the support platform 10; the guide rod 1 is fixed to the fixed support 7 by welding.

[0031] The wave energy capture system includes a float 4, a buoy 5, and a damping plate 6 which are cooperatively arranged to cause relative motion between the float 4, the buoy 5, and the damping plate 6 to capture wave energy.

[0032] A cage is provided inside the buoy 5. The cage is fixed to the damping plate 6 by bolts and a waterproof gasket is used to prevent water seepage. It is connected to the bottom for convenient disassembly and assembly, facilitating the maintenance of the linear motor 3 and the installation and debugging of the subsequent energy conversion system.

[0033] The linear motor 3 is connected to the buoy 5 through a cage. The cage includes an end cover 11, a motor support 12, a cage support 13, and a support ring 14; the end cover 11 is connected to the mover of the linear motor 3 through a linear bearing, and both ends of the mover of the linear motor 3 are constrained by vertical motion, ensuring the perpendicularity of the mover and avoiding motion deviation caused by tangential force.

[0034] The linear motor 3 is connected to the cage through bolts of the motor support 12; the cage is connected to the buoy 5 through bolts of the support ring 14.

[0035] The support platform 10 is fixed to the laser displacement sensor 2 by welding to simultaneously measure the displacement changes of the float 4 and the buoy 5. When conducting an optimized float test, the disassembly and assembly of the laser displacement sensor 2 can be avoided, and the range and accuracy of the laser displacement sensor 2 can be adjusted up and down.

[0036] The S-type tension and compression sensor 9 is arranged between the cage and the mover of the linear motor 3 and can accurately measure the control force to verify the performance of various control strategies.

[0037] The energy conversion system and the control system of the wave energy device are integrated. The system power generation efficiency is calculated by the relative speed between the linear motor control force and the wave energy power generation device to evaluate the energy capture performance of the wave energy power generation device, avoiding the installation of subsequent equipment such as generators. At the same time, the linear motor has a fast response speed and simple control, which can well verify the implementation of various control strategies.

[0038] The working principle of a dual-float wave energy power generation test device in an embodiment of the present invention is as follows: Based on the mutual cooperation of multiple functional components, the vertical displacements of the float, the floating cylinder, and the damping plate are restricted by the guide rod, ensuring the coaxiality of the floating body and avoiding damage to the energy conversion system. At the same time, the guide rod is connected to the float, the floating cylinder, and the damping plate through linear bearings, facilitating disassembly and assembly while conducting subsequent multi-degree-of-freedom tests and mooring tests. A linear generator is used to replace the energy conversion system, which is easy to implement various control strategies and also retains the installation interface of the subsequent energy conversion system to realize the full-process simulation from wave energy to electric energy.

[0039] Ocean wave energy has the advantages of large total reserves, wide distribution range, and high energy density. Developing and utilizing wave energy can provide a stable energy supply for offshore operation equipment. Generally, traditional linear wave energy power generation devices based on linear restoring forces can only work efficiently when approaching resonance. When the incident wave frequency differs greatly from the device's natural frequency, the wave energy power generation device will exhibit low power generation efficiency. Since actual ocean waves consist of a wide range of incident frequency components, traditional linear wave energy devices cannot approach resonance, affecting the overall power generation efficiency.

[0040] Due to the defects of existing wave energy power generation test devices and the lack of a corresponding general-purpose energy conversion system, the control strategies of wave energy devices cannot be effectively verified. Therefore, the wave energy power generation test device in this application conducts subsequent multi-degree-of-freedom tests and mooring tests to realize the full-process simulation of the conversion from wave energy to electric energy.

[0041] In the overall scheme, it mainly includes a support system for restricting the vertical displacement and heaving motion of the wave energy device to improve the coaxiality of the floating body of the wave energy device; a wave energy capture system for generating relative motion to capture wave energy; a control system for measuring the motion response of the wave energy capture system to control the linear motor to adjust the wave energy device to achieve maximum energy. The control system includes a laser displacement sensor, an S-type tension and compression sensor, and an acceleration sensor that are cooperatively arranged.

[0042] Specifically, for the support system, it includes multiple guide rods, a support platform, and a fixed support. The guide rods, the support platform, and the fixed support are connected into a whole through linear bearings, which facilitates disassembly and extraction for the six-degree-of-freedom test of the wave energy device and the mooring system test. The linear bearings ensure the smoothness of the connection and avoid the generation of excessive damping force.

[0043] Furthermore, the guide rods are fixed to the fixed support by welding. At the same time, the guide rods are connected to the support platform through U-shaped buckles to fix both ends of the guide rods and ensure the verticality of the guide rods. The use of U-shaped buckles also ensures that the support platform can move up and down to adjust the reference distance of the laser displacement sensor.

[0044] Since the models of the laser displacement sensors 2 are different and the measured reference distances are different, the U-shaped buckle connection can be adjusted and fixed according to the reference distance of the laser displacement sensor 2, ensuring wide application.

[0045] For the wave energy capture system, it includes a float, a buoy, and a damping plate that are set in cooperation to make the float, the buoy, and the damping plate generate relative motion to capture wave energy. A cage is provided inside the buoy. The cage is fixed to the damping plate by bolts and waterproof gaskets are used to prevent water seepage. The connection to the bottom is convenient for disassembly and assembly, facilitating the maintenance of the linear motor and the installation and debugging of the subsequent energy conversion system.

[0046] For the cage, it includes an end cover, a motor support, a cage support, and a support ring. The end cover is connected to the mover of the linear motor through a linear bearing. Both ends of the mover of the linear motor are constrained by vertical motion, ensuring the verticality of the mover and avoiding motion deviation caused by tangential force.

[0047] The cage is bolted to the buoy 5 through the support ring 14. The connection point between the cage and the buoy 5 is located at the bottom, which is easy to disassemble and assemble and convenient for taking out the linear motor 3. Waterproof gaskets are provided for the bolts between the support ring 14 and the buoy 5 to prevent water seepage.

[0048] In the control system, it mainly includes a laser displacement sensor, an S-type tension and compression sensor, and an acceleration sensor that are set in cooperation. The installation positions and specific quantities of each sensor can be set according to the specific scenario of the actual power generation simulation test, not limited to the above three sensors.

[0049] Generally, the laser displacement sensor is installed on the support platform, which can simultaneously measure the displacement changes of the float and the buoy. It can avoid the disassembly and assembly of the displacement sensor during the optimized float test, and can be adjusted up and down to ensure the range and accuracy of the displacement sensor. The S-type tension and compression sensor is arranged between the cage and the mover of the linear motor, which can accurately measure the control force to verify the performance of various control strategies.

[0050] The energy conversion system and the control system of this application are integrated. The power generation efficiency of the system is calculated by the relative speed of the linear motor control force and the wave energy power generation device to evaluate the energy capture performance of the wave energy power generation device, avoiding the installation of subsequent equipment such as generators. At the same time, the linear motor has a fast response speed and simple control, which can well verify the implementation of various control strategies.

[0051] In actual use, assemble the wave energy power generation test device according to the established structure, and place specific types of sensors at the designated positions according to the specific items of the simulation test to realize the full-process simulation from wave energy to electric energy.

[0052] In summary, a double-float wave energy power generation test device in the embodiments of the present invention is based on the mutual cooperation of multiple functional components. The vertical displacements of the float, the floating drum, and the damping plate are restricted by the guide rod, ensuring the coaxiality of the floating body and avoiding damage to the energy conversion system. At the same time, the guide rod is connected to the float, the floating drum, and the damping plate through linear bearings, facilitating disassembly and assembly and subsequent multi-degree-of-freedom tests and mooring tests. The linear generator is used to replace the energy conversion system, which is easy to implement various control strategies and also retains the installation interface of the subsequent energy conversion system to realize the full-process simulation from wave energy to electric energy.

[0053] The above specific implementation manners cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the embodiments of the present invention falls within the protection scope of the present invention.

[0054] Where the present invention is not described in detail, it is all well-known technology to those skilled in the art of this technology.

Claims

1. A double-floating-body wave energy power generation test device, characterized in that The power generation test device includes: A support system, which is used to restrict the vertical displacement and heaving motion of the wave energy device to improve the coaxiality of the floating body of the wave energy device; A wave energy capture system, which is used to generate relative motion to capture wave energy; A control system, which is used to measure the motion response of the wave energy capture system to control the linear motor to adjust the wave energy device to achieve maximum energy; the control system includes a laser displacement sensor, an S-type tension and compression sensor, and an acceleration sensor that are cooperatively arranged.

2. The double-floating-body wave energy power generation test device according to claim 1, wherein: The support system includes multiple guide rods, a support platform, and a fixed support. The guide rods, the support platform, and the fixed support are connected into a whole through linear bearings, which is convenient for disassembly and extraction to conduct six-degree-of-freedom tests on the wave energy device and mooring system tests; the linear bearings ensure the smoothness of the connection and avoid the generation of excessive damping force.

3. A double-floating-body wave energy power generation test device according to claim 2, characterized in that: The guide rod is connected to the support platform through a U-shaped buckle, and the U-shaped buckle is tightly fixed on the support platform; the guide rod is fixed to the fixed support by welding.

4. A double-floating-body wave energy power generation test device according to claim 1, characterized in that: The wave energy capture system includes a float, a buoy, and a damping plate that are cooperatively arranged to make the float, the buoy, and the damping plate generate relative motion to capture wave energy.

5. A double-floating-body wave energy power generation test device according to claim 4, characterized in that: A cage is arranged inside the buoy. The cage is fixed to the damping plate by bolts and is waterproofed by a waterproof gasket. It is connected to the bottom for easy disassembly and installation, which is convenient for the maintenance of the linear motor and the installation and commissioning of the subsequent energy conversion system.

6. The double-float wave energy power generation test device according to claim 5, wherein: The linear motor is connected to the buoy through the cage. The cage includes an end cover, a motor support, a cage support, and a support ring; the end cover is connected to the mover of the linear motor through a linear bearing, and both ends of the mover of the linear motor are constrained by vertical motion, which ensures the perpendicularity of the mover and avoids the motion deviation caused by tangential force.

7. A double-floating-body wave energy power generation test device according to claim 6, characterized in that: The linear motor is connected to the cage through motor support bolts; the cage is connected to the buoy through support ring bolts.

8. The double-floating-body wave energy power generation test device according to claim 2, characterized in that: The support platform is fixed to the laser displacement sensor by welding to simultaneously measure the displacement changes of the float and the buoy. When optimizing the float test, the disassembly and installation of the laser displacement sensor can be avoided, and at the same time, it can be adjusted up and down to ensure the range and accuracy of the laser displacement sensor.

9. A double-floating-body wave energy power generation test device according to claim 6, characterized in that: The S-type tension and compression sensor is arranged between the cage and the mover of the linear motor to accurately measure the control force to verify the performance of various control strategies.

10. A double-floating-body wave energy power generation test device according to claim 1, characterized in that: The energy conversion system of the wave energy device is integrated with the control system. The system power generation efficiency is calculated through the control force of the linear motor and the relative speed of the wave energy power generation device to evaluate the energy capture performance of the wave energy power generation device. The installation of subsequent equipment such as generators is avoided. At the same time, the linear motor has a fast response speed and simple control, and can well verify the implementation of various control strategies.

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