An adaptive high-efficiency wave energy power generation device and method

Abstract

This invention provides an adaptive high-efficiency wave energy generation device and method, including a linear generator, a data acquisition device, a motor, an energy-absorbing float, a connecting rod, and a central controller. At least one motor is mounted on the bottom of the linear generator, and the bottom of each motor is connected to the energy-absorbing float. The connecting rod is mounted on the top of the energy-absorbing float and extends into the linear generator. The data acquisition device and the motor are both signal-connected to the central controller. The central controller drives the motor to apply optimal output force to the energy-absorbing float based on the output data from the data acquisition device. The energy-absorbing float achieves extremely high wave energy capture efficiency for the current ocean waves. It actively adjusts the force output by the motor to the energy-absorbing float for different wave frequencies, ensuring that the force output by the motor is always equal to the optimal output force, thus achieving all-weather high-efficiency wave energy capture.

Description

Technical Field

[0001] This invention relates to the field of power generation technology, and in particular to an adaptive high-efficiency wave energy power generation device. Background Technology

[0002] A wave energy power generation device is a device that uses wave energy as an energy source to generate electricity. Existing wave energy power generation devices typically have a three-stage energy conversion process. The first stage is the wave energy capture process, converting wave energy into other forms of energy for subsequent use. Common types include converting wave energy into aerodynamic energy, water potential energy, hydraulic energy, or mechanical energy. The second stage is an intermediate energy conversion stage, converting the energy from the previous stage into an energy form suitable for use as input to the power generation system. The third stage is the power generation stage. If the energy form produced by the first stage is suitable for use as input to the selected power generation system, theoretically, the intermediate energy conversion stage can be omitted.

[0003] Existing wave energy generation devices improve the final wave energy utilization rate by reducing energy losses in the second and third stage conversion processes, or by designing new floating bodies to increase the amount of waves received, thereby increasing the final power generation. On the other hand, they also optimize the wave energy capture efficiency for waves of a certain frequency or peak frequency according to the wave conditions of the working area. However, when the main frequency of the wave spectrum changes due to seasonal or wind zone changes in the working water area, they cannot work efficiently, that is, they cannot efficiently absorb wave energy across the entire spectrum. Therefore, the problem of improving the efficiency of broad-spectrum wave energy capture remains to be solved.

[0004] For example, Chinese invention patent CN114738175A discloses a wave energy power generation device, a wind and wave integrated power generation system, and a method. The device includes a magnetic column, a float, a coil assembly, a guide column, and an extension mechanism. The extension mechanism supports and fixes the guide column, which contains a magnetic column. The float is fitted onto the guide column and floats in the water. The coil assembly inside the float moves up and down and rotates along the guide column as it is impacted by waves, generating current by cutting magnetic field lines. This invention provides a power generation method that, under the same wave conditions, converts wave energy into electrical energy more efficiently than traditional single-degree-of-freedom float power generation devices, improving energy conversion efficiency. However, it is essentially still a power generation device without active control, and its wave energy absorption efficiency is still limited by the wave conditions of the working environment. Currently, there is an urgent need for a wave energy power generation device with active control capabilities that can efficiently capture wave energy regardless of the wave conditions in the working environment. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive high-efficiency wave energy power generation device and method. Based on wave absorption theory, it adopts an active control scheme and uses a self-developed control algorithm to achieve efficient wave energy capture in a wide range of wave frequencies and all weather conditions. Compared with floating power generation devices without active control, it can achieve higher wave energy capture efficiency. It can provide a solution to the problem that most current wave energy power generation devices have low first-stage energy conversion efficiency or can only work efficiently under limited conditions.

[0006] This invention is achieved through the following technical solution:

[0007] The first aspect of the present invention discloses an adaptive high-efficiency wave energy generation device, comprising a linear generator, a data acquisition device, a motor, an energy-absorbing float, a connecting rod, and a central controller. At least one motor is provided at the bottom of the linear generator, and the bottom of each motor is connected to the energy-absorbing float. The connecting rod is provided at the top of the energy-absorbing float and extends into the interior of the linear generator. The data acquisition device and the motor are both signal-connected to the central controller. The central controller is used to drive the motor to apply optimal output force to the energy-absorbing float based on the output data of the data acquisition device.

[0008] Optionally, the linear generator has a vertically arranged moving part movement pipe inside, the moving part movement pipe contains a generator moving part, the moving part movement pipe is fitted with a generator coil, the bottom of the linear generator is provided with a guide sleeve, and the connecting rod extends vertically through the guide sleeve into the moving part movement pipe and is fixedly connected to the generator moving part.

[0009] Optionally, the energy-absorbing float is shaped like a right triangular prism with a right-angled triangle base, and the connecting rod and the motor are both located on one of the right-angled sides of the energy-absorbing float.

[0010] Optionally, the data acquisition device includes a wave measuring radar and a displacement sensor. The wave measuring radar is installed on the upper part of the linear generator, and the displacement sensor is installed on the bottom of the linear generator. Both the wave measuring radar and the displacement sensor are connected to the central controller.

[0011] Optionally, it also includes a first limiter and a second limiter, both of which are disposed on the vertical wall surface. The first limiter is located at the top of the energy-absorbing float and is spaced apart by a certain distance, while the second limiter is located on the side of the energy-absorbing float and is spaced apart by a certain distance.

[0012] The second aspect of the present invention discloses an adaptive high-efficiency wave energy power generation method, employing an adaptive high-efficiency wave energy power generation device as described in the first aspect of the present invention, comprising the following steps:

[0013] Obtain the first correspondence between the optimal control force coefficient and the wave frequency, wherein the optimal control force coefficient includes the damping force coefficient and the restoring force coefficient that maximize the wave energy capture efficiency;

[0014] Obtain the second correspondence between the force exerted by the linear generator on the energy-absorbing float and the velocity of the energy-absorbing float;

[0015] Acquire data information detected by the displacement sensor and the wave measuring radar, including the displacement of the energy-absorbing float, the velocity of the energy-absorbing float, and the wave frequency;

[0016] Based on the data information and the first correspondence, the optimal control force coefficient of the energy-absorbing float is obtained;

[0017] Based on the data information and the optimal control force coefficient, the optimal control force is obtained. The optimal control force is an additional control force that maximizes the wave energy capture efficiency. The additional control force includes the force exerted by the electric motor on the energy-absorbing float and the force exerted by the linear generator on the energy-absorbing float.

[0018] Based on the data information and the second correspondence, the force exerted by the linear generator on the energy-absorbing buoy is obtained;

[0019] Based on the optimal control force and the force exerted by the linear generator on the energy-absorbing float, the optimal output force is obtained. The optimal output force is the force exerted by the electric motor on the energy-absorbing float to maximize the wave energy capture efficiency.

[0020] Optionally, obtaining the optimal control force based on the data information and the optimal control force coefficient specifically includes:

[0021] The relationship between the optimal control force applied to the energy-absorbing float, the wave frequency, and the motion state of the energy-absorbing float is as follows:

[0022] F(ω,v,z)=b(ω)*v+c(ω)*z

[0023] F(ω,v,z) is the optimal control force applied to the energy-absorbing float, ω is the wave frequency, b(ω) is the damping force coefficient, c(ω) is the restoring force coefficient, v is the velocity of the energy-absorbing float, and z is the displacement of the energy-absorbing float.

[0024] Optionally, after obtaining the optimal output force, the specific steps include:

[0025] The central controller controls the electric motor to output the optimal output force to the energy-absorbing float.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0027] This invention provides an adaptive high-efficiency wave energy generation device and method. A linear generator, connected to an energy-absorbing float via a connecting rod, completes the power generation process. A data acquisition device collects wave information from the ocean and the displacement information of the energy-absorbing float as it is subjected to wave action. This information is transmitted in real time to a central controller. The central controller processes the wave and displacement information to obtain the wave frequency near the energy-absorbing float and the velocity information of the float's vertical movement, ultimately determining the optimal output force. The central controller then drives a motor to apply this optimal output force to the energy-absorbing float, ensuring that the additional control force on the float equals the optimal control force. Under this optimal control force, the energy-absorbing float achieves extremely high wave energy capture efficiency. This invention's device can actively adjust the motor's output force to the energy-absorbing float for different wave frequencies, ensuring that the additional control force always equals the optimal control force. This ultimately achieves efficient absorption of waves across a wide frequency range, enabling high-efficiency power generation by acquiring high wave energy input. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an adaptive high-efficiency wave energy generation device provided by the present invention.

[0030] Figure 2 This is a schematic diagram of the structure of an adaptive high-efficiency wave energy generation device provided by the present invention.

[0031] Figure 3 The present invention provides a structural block diagram of an adaptive high-efficiency wave energy generation device.

[0032] Figure 4 The flowchart illustrates an adaptive and efficient wave energy generation method provided by this invention.

[0033] Figure 5 The numerical simulation results provided for this invention show a comparison of power generation under active control and non-active control conditions.

[0034] In the diagram, 1 is a linear generator, 2 is a data acquisition device, 201 is a wave measuring radar, 202 is a displacement sensor, 3 is a motor, 4 is an energy-absorbing float, 5 is a connecting rod, 6 is a central controller, 7 is a remote terminal, 8 is a moving part movement pipe, 9 is a generator moving part, 10 is a generator coil, 11 is a guide sleeve, 12 is a first limiter, and 13 is a second limiter. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0036] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0037] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0039] To fully understand this invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this invention. Optional embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0040] See Figures 1 to 3The first aspect of the present invention discloses an adaptive high-efficiency wave energy generation device, including a linear generator 1, a data acquisition device 2, a motor 3, an energy-absorbing float 4, a connecting rod 5, and a central controller 6. At least one motor 3 is provided at the bottom of the linear generator 1, and the bottom of each motor 3 is connected to the energy-absorbing float 4. A connecting rod 5 is provided at the top of the energy-absorbing float 4, and the connecting rod 5 extends into the interior of the linear generator 1. The data acquisition device 2 and the motor 3 are both signal-connected to the central controller 6. The central controller 6 is used to drive the motor 3 to apply the optimal output force to the energy-absorbing float 4 according to the output data of the data acquisition device 2.

[0041] The central controller 6 can be a single-chip microcomputer controller, which can realize human-computer interaction or modify the built-in program of the central controller 6 through the remote terminal 7. The linear generator 1 can be fixed on a vertical wall, such as the outer wall of a dam or offshore platform. Multiple power generation devices can be arranged in rows along the outer wall of the dam or offshore platform to form a power generation device array. Multiple motors 3 can be set at the bottom of the linear generator 1. At this time, the energy-absorbing float 4 connected to the linear generator 1 through multiple motors 3 needs to be as close as possible to a vertical wall of a certain size without contacting the vertical wall. The connecting rod 5 set at the top of the energy-absorbing float 4 extends into the interior of the linear generator 1, ensuring that the connecting rod 5 is parallel to the vertical direction, so as to assist the linear generator 1 in generating electricity. The number and specific arrangement of the motors 3 need to be determined in combination with the mass distribution of the energy-absorbing float 4. The specific size of the energy-absorbing float 4 needs to be determined in combination with the environmental conditions of the working sea area. At the same time, it should be ensured that the energy-absorbing float 4 will not be completely submerged in water during normal operation.

[0042] Data acquisition device 2 can detect wave information around energy-absorbing float 4 in the sea area and displacement information of energy-absorbing float 4 when it is subjected to waves. It transmits the wave information and displacement information to central controller 6 in real time. After processing the wave information and displacement information, central controller 6 can obtain the wave frequency near energy-absorbing float 4 and the speed information of energy-absorbing float 4 when it moves up and down. Finally, it obtains the optimal output force. Electric motor 3 can provide additional force to energy-absorbing float 4 during its up and down movement. According to the optimal output force information, central controller 6 can drive electric motor 3 to apply the optimal output force to energy-absorbing float 4. Under the action of the optimal output force, energy-absorbing float 4 can achieve extremely high wave energy capture efficiency against the waves at the energy-absorbing float location at the current time.

[0043] Furthermore, a moving part movement pipe 8 is vertically arranged inside the linear generator 1, a generator moving part 9 is arranged inside the moving part movement pipe 8, a generator coil 10 is sleeved on the moving part movement pipe 8, a guide sleeve 11 is arranged at the bottom of the linear generator 1, and a connecting rod 5 extends vertically through the guide sleeve 11 into the moving part movement pipe 8 and is fixedly connected to the generator moving part 9.

[0044] The vertically arranged moving element movement pipe 8 inside the linear generator 1 ensures that the generator moving element 9 moves in the vertical direction. The generator moving element 9 is made of permanent magnet material. The guide sleeve 11 at the bottom of the linear generator 1 is a hollow tube surrounding the connecting rod 5, which ensures that the connecting rod 5 moves in the vertical direction and prevents the connecting rod 5 from rotating. When the energy-absorbing float 4 interacts with the waves, it can convert the wave energy into the mechanical energy of the energy-absorbing float 4 and the connected components. When the energy-absorbing float 4 is subjected to the waves, it will drive the generator moving element 9 to move up and down in the moving element movement pipe 8 through the connecting rod 5. During the up and down movement of the generator moving element 9, the generator coil 10 sleeved on the moving element movement pipe 8 will cut the magnetic field lines to generate induced current, thereby realizing power generation.

[0045] Furthermore, the energy-absorbing float 4 is shaped like a right triangular prism with a right-angled triangle base, and the connecting rod 5 and the motor 3 are both located on one of the right-angled sides of the energy-absorbing float 4.

[0046] The side of the right triangle base of the energy-absorbing float 4, where the longer right-angled side is located, is close to and parallel to the vertical wall. The connecting rod 5 and the motor 3 are both located on the side of the right triangle base of the energy-absorbing float 4, where the shorter right-angled side is located. The side of the right triangle base of the energy-absorbing float 4, where the hypotenuse is located, faces the direction from which the waves impact, so that the energy-absorbing float 4 can move up and down when the waves impact it.

[0047] The shape of the energy-absorbing float 4 was selected through numerical experiments. The numerical experimental results show that the shape of the energy-absorbing float 4 can achieve efficient wave energy capture for regular waves in a wide frequency range. Numerical simulation data shows that when the angle between the longer right-angled side and the hypotenuse in the base of the right triangle of the energy-absorbing float 4 is around 30°, it can achieve an absorption efficiency of more than 99% for regular waves in a wide frequency range.

[0048] Furthermore, the data acquisition device 2 includes a wave measuring radar 201 and a displacement sensor 202. The wave measuring radar 201 is installed on the upper part of the linear generator 1, and the displacement sensor 202 is installed at the bottom of the linear generator 1. Both the wave measuring radar 201 and the displacement sensor 202 are connected to the central controller 6 via signals.

[0049] The wave measuring radar 201 is installed on the upper part of the linear generator 1, for example, on the top of the linear generator 1. It can detect the wave information around the energy-absorbing float 4 in real time and transmit the wave information to the central controller 6. The displacement sensor 202 installed at the bottom of the linear generator 1 can detect the displacement information of the energy-absorbing float 4 moving up and down in real time and transmit the displacement information to the central controller 6.

[0050] Furthermore, it also includes a first limiter 12 and a second limiter 13. Both the first limiter 12 and the second limiter 13 are set on the vertical wall surface. The first limiter 12 is located at the top of the energy-absorbing float 4 and is a distance apart from it. The second limiter 13 is located on the side of the energy-absorbing float 4 and is a distance apart from it.

[0051] The first limiter 12 and the second limiter 13 are both fixedly installed on the vertical wall. The first limiter 12 is a distance above the energy-absorbing float 4 to limit the maximum height of the energy-absorbing float 4 when it moves up and down. This is to prevent the energy-absorbing float 4 from moving too high due to large waves or a sudden increase in water level, which could damage the linear generator 1 and other devices above. The two second limiters 13 are respectively installed on the left and right sides of the energy-absorbing float 4, each a short distance away from the energy-absorbing float 4, to prevent the energy-absorbing float 4 from swaying left and right or rotating when it moves up and down. The guide sleeve 11 and the second limiter 13 simultaneously ensure that the energy-absorbing float 4 can move in a single degree of freedom.

[0052] See Figures 4 to 5 The second aspect of the present invention discloses an adaptive high-efficiency wave energy power generation method, employing an adaptive high-efficiency wave energy power generation device as described in the first aspect of the present invention, comprising the following steps:

[0053] Obtain the first correspondence between the optimal control force coefficient and the wave frequency. The optimal control force coefficient includes the damping force coefficient and the restoring force coefficient that maximize the wave energy capture efficiency.

[0054] Obtain the second correspondence between the force exerted by the linear generator 1 on the energy-absorbing float 4 and the velocity of the energy-absorbing float 4;

[0055] The data information detected by displacement sensor 202 and wave radar 201 is acquired, including the displacement of energy-absorbing float 4, the speed of energy-absorbing float 4 and wave frequency;

[0056] Based on the data information and the first correspondence, the optimal control force coefficient of the energy-absorbing float 4 is obtained;

[0057] Based on data information and the optimal control force coefficient, the optimal control force is obtained. The optimal control force is the additional control force that maximizes the wave energy capture efficiency. The additional control force includes the force of the electric motor 3 on the energy-absorbing float 4 and the force of the linear generator 1 on the energy-absorbing float 4.

[0058] Based on the data information and the second correspondence, the force exerted by the linear generator 1 on the energy-absorbing float 4 is obtained;

[0059] Based on the optimal control force and the force exerted by the linear generator 1 on the energy-absorbing float 4, the optimal output force is obtained. The optimal output force is the force exerted by the electric motor 3 on the energy-absorbing float 4 to maximize the wave energy capture efficiency.

[0060] Based on the physical properties of the energy-absorbing float 4, the numerical program in the central controller 6 calculates the correspondence between the optimal control force coefficient and the wave frequency in advance, which is called the first correspondence. The data is then compiled into a table and stored in the central controller 6. The optimal control force coefficient includes the damping force coefficient and the restoring force coefficient that maximize the wave energy capture efficiency. The central controller 6 can quickly obtain the corresponding optimal control force coefficient based on the wave frequency at the current time.

[0061] The force exerted by the linear generator 1 on the energy-absorbing float 4 is called the generator force. The generator force refers to the force applied by the linear generator 1 to the generator mover 9 during the power generation process. It is mainly the damping force experienced by the generator mover 9 during its up-and-down movement, and is applied to the energy-absorbing float 4 through the connecting rod 5. The generator force is related to the physical characteristics of the linear generator 1 and the speed of the generator mover 9, i.e., the speed of the energy-absorbing float 4. After determining the linear generator 1, it is mainly related only to the speed of the energy-absorbing float 4. The correspondence between the discrete generator force and the speed of the energy-absorbing float 4 can be obtained experimentally. Then, the complete correspondence is obtained through numerical methods, which is called the second correspondence, and stored in the central controller 6. That is, the force exerted by the linear generator 1 on the energy-absorbing float 4 at the current time can be obtained based on the speed of the energy-absorbing float 4 at the current time and the second correspondence. Under real conditions, the position of the energy-absorbing float 4 during its movement may have a certain influence on the force exerted by the linear generator 1 on the energy-absorbing float 4.

[0062] The process from the start of data acquisition by data acquisition device 2 to the end of the process of motor 3 applying the optimal output force to energy-absorbing float 4 is called an energy-absorbing unit process. If the time consumed by each energy-absorbing unit process is short enough, the wave energy carried by the water body interacting with the energy-absorbing float 4 in the energy-absorbing unit process can be efficiently absorbed. If the time consumed by a single energy-absorbing unit process is short enough and the energy-absorbing unit process is repeated continuously, efficient wave energy capture can be achieved around the clock.

[0063] The displacement information of the energy-absorbing float 4 detected by displacement sensor 202 and the wave information in the vicinity of the energy-absorbing float 4 detected by wave measuring radar 201 are acquired and transmitted to the central controller 6. After data processing, the central controller 6 obtains the velocity of the energy-absorbing float 4 and the wave frequency in the vicinity of the energy-absorbing float 4. Thus, the central controller 6 can quickly obtain from the data table the damping force coefficient and restoring force coefficient that maximize the wave energy capture efficiency under the condition that the motor 3 and the linear generator 1 provide additional damping force and restoring force corresponding to the measured wave frequency, i.e., the optimal control force coefficient. The additional control force on the energy-absorbing float 4 includes the force exerted by the motor 3 on the energy-absorbing float 4 and the force exerted by the linear motor 1 on the energy-absorbing float 4. The central controller 6 calculates the force that the motor 3 needs to provide to the energy-absorbing float 4 to maximize wave energy capture efficiency, i.e., the optimal output force, based on the displacement of the energy-absorbing float 4, the speed of the energy-absorbing float 4, the wave frequency near the energy-absorbing float 4, the second correspondence between the generator force and the speed of the energy-absorbing float 4, and the optimal control force coefficient. Then, the central controller 6 drives the motor 3 to apply the optimal output force to the energy-absorbing float 4, so that the additional control force on the energy-absorbing float 4 is equal to the optimal control force. Thus, the additional control force on the energy-absorbing float 4 is always equal to the optimal control force. Under the action of the optimal control force, efficient wave energy capture can be achieved, and efficient power generation can be achieved by obtaining high wave energy input.

[0064] Furthermore, based on data information and optimal control coefficients, the optimal control force is obtained, specifically including:

[0065] The relationship between the optimal control force applied to the energy-absorbing float 4, the wave frequency, and the motion state of the energy-absorbing float 4 is as follows:

[0066] F(ω,v,z)=b(ω)*v+c(ω)*z

[0067] F(ω,v,z) is the optimal control force applied to the energy-absorbing float 4, ω is the wave frequency, b(ω) is the damping force coefficient, c(ω) is the restoring force coefficient, v is the velocity of the energy-absorbing float 4, and z is the displacement of the energy-absorbing float 4.

[0068] According to the single-body wave energy absorption theory, for a single-degree-of-freedom motion energy-absorbing float 4 system with additional damping and restoring force sources (such as provided by motor 3 and linear generator 1), there is theoretically a case where the energy-absorbing float 4 has a wave energy absorption efficiency of 100%. That is, the additional damping and restoring forces on the energy-absorbing float 4, the frequency of the regular waves, and the motion state of the energy-absorbing float 4 need to reach a certain specific correspondence. The size and shape of the energy-absorbing float 4 are also factors affecting the optimal control force coefficient. After the selection of the energy-absorbing float 4 is completed, the damping force coefficient and the restoring force coefficient, i.e. the optimal control force coefficient, are only related to the frequency of the waves. The optimal control force coefficient at each wave frequency can be calculated according to the relationship formula.

[0069] Furthermore, after achieving optimal output, the specific steps include:

[0070] The central controller 6 controls the electric motor 3 to output the optimal force to the energy-absorbing float 4.

[0071] After the central controller 6 calculates the optimal output force, it drives the motor 3 to apply the optimal output force to the energy-absorbing float 4, so that the additional control force on the energy-absorbing float 4 is equal to the optimal control force, and finally achieves the maximum wave energy capture efficiency.

[0072] Actual ocean waves are irregular waves, which are not simply superpositions of waves of multiple frequencies. The device of this invention is designed for efficient absorption of regular waves and has not been specially optimized for the absorption of irregular waves. In this case, the control process needs to be changed to analyze the real-time ocean wave data measured by the wave measuring radar 201, obtain the dominant frequency in the wave as the wave frequency, adjust the optimal control force coefficient according to the wave frequency at the current time, and continuously and repeatedly perform the energy absorption unit process to achieve efficient wave energy capture in all weather conditions.

[0073] For example, the device of the present invention can achieve high wave energy capture efficiency over a wide range of wave frequencies. The angle between the longer right-angled side and the hypotenuse of the right-angled triangle base of the energy-absorbing float 4 is set to 30°, with the 30° angle at the bottom. The energy-absorbing float 4 has a draft of 26 meters when stationary, and the measured ambient water depth in the current sea area is 120 meters. The average power generation of the device of the present invention is compared between using active control and not using active control (i.e., disabling motor 3). Energy-absorbing floats 4 of the same shape and size as described above are selected and arranged side-by-side to form a 50-meter-wide power generation array. For regular waves with a wave height of 1.4m and a frequency of 0.57-1.07 rad / s, calculations are performed every 0.05 rad / s. The damping force coefficient in the optimal control force coefficient corresponding to the working condition is taken as the damping coefficient of generator 1. Based on the numerical calculation results, the average power generation comparison curve is shown below. Figure 5As shown, the power generation value using active control has taken into account the power consumed by the motor 3 when applying the optimal output force. It can be seen that the device of the present invention can achieve relatively higher power generation efficiency across the entire calculation frequency range. By comparing the average power generation efficiency of each operating condition, it can be seen that within the calculation operating range, the power generation is increased by 25.5% overall when active control is activated compared to when there is no active control.

[0074] It should be noted that the numerical simulation results are based on regular waves of a fixed frequency and solve for the power generation efficiency under steady-state conditions. Due to the inertia of objects, a certain reaction time is required to reach a steady state. Therefore, for waves that are constantly changing in the actual working environment, it cannot be guaranteed that this device can achieve the same power generation at the same instantaneous frequency as the numerical simulation.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adaptive high efficient wave energy power generation device, characterized in that, The system includes a linear generator, a data acquisition device, a motor, an energy-absorbing float, a connecting rod, and a central controller. At least one motor is located at the bottom of the linear generator, and the bottom of each motor is connected to the energy-absorbing float. The connecting rod is located at the top of the energy-absorbing float and extends into the linear generator, where it is fixedly connected to the generator's actuator. The data acquisition device and the motor are both signal-connected to the central controller. The central controller is used to drive the motor to apply optimal output force to the energy-absorbing float based on the output data from the data acquisition device. The data acquisition device includes a wave-measuring radar and a displacement sensor. The wave-measuring radar is located at the top of the linear generator, and the displacement sensor is located at the bottom of the linear generator. Both the wave-measuring radar and the displacement sensor are signal-connected to the central controller. The data acquisition device can detect wave information around the energy-absorbing buoy in the sea area and displacement information of the energy-absorbing buoy's vertical movement when subjected to waves. It transmits the wave information and displacement information to the central controller in real time. After processing the wave information and displacement information, the central controller can obtain the wave frequency near the energy-absorbing buoy and the speed information of the energy-absorbing buoy's vertical movement, and finally obtain the optimal output force.

2. The adaptive high-efficiency wave energy generation device according to claim 1, characterized in that, The linear generator has a vertically arranged moving part channel inside, and a generator moving part is arranged inside the moving part channel. A generator coil is sleeved on the moving part channel. A guide sleeve is arranged at the bottom of the linear generator. The connecting rod extends vertically through the guide sleeve and into the moving part channel to be fixedly connected to the generator moving part.

3. The adaptive high-efficiency wave energy generation device according to claim 1, characterized in that, The energy-absorbing float is shaped like a right triangular prism with a right-angled triangle base. The connecting rod and the motor are both located on one of the right-angled sides of the energy-absorbing float.

4. The adaptive high-efficiency wave energy generation device according to claim 1, characterized in that, It also includes a first limiter and a second limiter, both of which are set on the vertical wall surface. The first limiter is located at the top of the energy-absorbing float and is a distance away from it, while the second limiter is located on the side of the energy-absorbing float and is a distance away from it.

5. An adaptive and efficient wave energy generation method, characterized in that, The adaptive high-efficiency wave energy generation device according to any one of claims 1-4 includes the following steps: Obtain the first correspondence between the optimal control force coefficient and the wave frequency, wherein the optimal control force coefficient includes the damping force coefficient and the restoring force coefficient that maximize the wave energy capture efficiency; Obtain the second correspondence between the force exerted by the linear generator on the energy-absorbing float and the velocity of the energy-absorbing float; Acquire data information detected by the displacement sensor and the wave measuring radar, including the displacement of the energy-absorbing float, the velocity of the energy-absorbing float, and the wave frequency; Based on the data information and the first correspondence, the optimal control force coefficient of the energy-absorbing float is obtained; Based on the data information and the optimal control force coefficient, the optimal control force is obtained. The optimal control force is an additional control force that maximizes the wave energy capture efficiency. The additional control force includes the force exerted by the electric motor on the energy-absorbing float and the force exerted by the linear generator on the energy-absorbing float. Based on the data information and the second correspondence, the force exerted by the linear generator on the energy-absorbing buoy is obtained; Based on the optimal control force and the force exerted by the linear generator on the energy-absorbing float, the optimal output force is obtained. The optimal output force is the force exerted by the electric motor on the energy-absorbing float to maximize the wave energy capture efficiency.

6. The adaptive high-efficiency wave energy generation method according to claim 5, characterized in that, Obtaining the optimal control force based on the data information and the optimal control force coefficient specifically includes: The relationship between the optimal control force applied to the energy-absorbing float, the wave frequency, and the motion state of the energy-absorbing float is as follows: To apply the optimal control force to the energy-absorbing buoy, For wave frequency, The damping force coefficient, The restoring force coefficient, The speed of the energy-absorbing buoy's motion. This represents the displacement of the energy-absorbing buoyant body.

7. The adaptive high-efficiency wave energy generation method according to claim 5, characterized in that, After obtaining the optimal output force, the specific steps include: The central controller controls the electric motor to output the optimal output force to the energy-absorbing float.

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