A compound wave energy power generation device based on built-in oscillating body motion control

Abstract

The present application relates to the technical field of marine renewable energy utilization, and discloses a composite wave energy power generation device based on built-in oscillating body motion control, comprising a ring-shaped floating carrier platform, an air turbine generator set and a plurality of built-in oscillating body power generation systems, the ring-shaped floating carrier platform is composed of an inner shell and an outer shell, the upper ends of the inner shell and the outer shell are fixedly connected with a deck, the lower ends of the inner shell and the outer shell are fixedly connected with a ring-shaped base, the bottom of the inner shell is open to seawater to form an oscillating water column, the free surface of the water column, the inner shell and the deck form an air chamber, the air turbine generator set is installed at the center of the deck, and is used for converting the air kinetic energy generated in the air chamber due to the movement of the oscillating water column into electric energy. The technical scheme can effectively suppress the movement of the floating carrier through the built-in oscillating body power generation system, can increase the relative movement amplitude of the oscillating water column and the floating carrier, and can further improve the wave energy capture efficiency.

Description

Technical Field

[0001] This invention relates to the field of marine renewable energy utilization technology, specifically to a composite wave energy power generation device based on the motion control of a built-in oscillator. Background Technology

[0002] Ocean energy, as a abundant and renewable clean energy source, boasts significant advantages such as high energy density and immunity to seasonal and diurnal variations. The development and utilization of wave energy, in particular, has attracted considerable attention. Wave energy, as a clean and renewable energy source, possesses enormous development potential. Currently, mainstream wave energy conversion devices (WECs) mainly include oscillating water column (OWC) and oscillating float types. However, due to the low-frequency, multi-directional, and highly random characteristics of waves, current wave energy conversion devices struggle to achieve full-condition compatibility. Harsh environments such as high salt spray, strong corrosion, and storm surges in the ocean exacerbate structural and component wear. The numerous power transmission and energy conversion stages result in multiple energy losses, leading to drawbacks such as low energy capture efficiency, poor stability and reliability, short maintenance cycles, and high costs.

[0003] In existing technologies, such as Chinese patent CN107842459B, a "combined wave energy conversion device of oscillating water column and oscillating float" is disclosed. Although this device combines two technologies, it adopts a pile-foundation fixed structure, relying on pile driving to fix it to the seabed, which limits its application in deep-sea areas. In addition, the oscillating float of this technology is located on the outside and directly exposed to seawater, suffering from long-term seawater corrosion, marine organism attachment, and direct impact from extreme winds and waves, resulting in high maintenance costs and challenges to reliability.

[0004] For floating OWC devices, the heave motion of the external structure of the power generation platform under wave action will counteract the relative motion of the water column inside the pipe, resulting in a smaller range of air pressure changes in the air chamber, thereby reducing the energy capture efficiency. Therefore, how to effectively suppress the motion response of the external structure while capturing wave energy to the maximum extent possible, and improve the reliability and power generation efficiency of the device, is a key problem that floating OWC technology urgently needs to solve. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a composite wave energy generation device based on the motion control of a built-in oscillator. This solves the problem that the heave motion of the external structure of the power generation platform can counteract the relative motion of the water column inside the pipe, resulting in a reduced pressure change in the air chamber and thus a decrease in energy capture efficiency.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a composite wave energy power generation device based on the motion control of a built-in oscillator, comprising a floating carrier platform, an air turbine generator set, and multiple built-in oscillator power generation systems. The floating carrier platform consists of an inner shell and an outer shell. The upper ends of the inner shell and the outer shell are fixedly connected to a deck, and the lower ends of the inner shell and the outer shell are fixedly connected to an annular base. The bottom of the inner shell is open to seawater to form an oscillating water column. The free liquid surface of the water column, the inner shell, and the deck constitute an air chamber. The air turbine generator set is installed in the center of the deck and uses the air turbine generator set to convert the airflow energy generated by the movement of the oscillating water column in the air chamber into electrical energy. Multiple partitions are fixedly connected between the inner shell and the outer shell, which divide the space between the floating carrier platform into multiple completely sealed equipment compartments. An auxiliary air chamber is formed between two adjacent equipment compartments. Multiple built-in oscillator power generation systems are installed in multiple equipment compartments and can reciprocate vertically relative to the floating carrier platform. The built-in oscillator power generation systems convert inertial kinetic energy into electrical energy by reciprocating linearly with a lag behind the floating carrier platform.

[0007] As a further description of the above technical solution, multiple equipment compartments are evenly distributed between the inner shell and the outer shell, and the deck and the annular base form a sealed space to provide the buoyancy required for the floating carrier platform on the water surface. The side wall of the annular base has a water inlet that communicates with the auxiliary air chamber. The water inlet is open to seawater, allowing seawater to freely enter and exit the auxiliary air chamber. The side wall of the outer shell has multiple matrix-arranged water perforations. The water perforations guide seawater into the auxiliary air chamber and together with the seawater entering from the water inlet, they form a wave-damping and load-reducing water body in the auxiliary air chamber, which can reduce the impact of seawater on the floating carrier platform and reduce the lateral sway amplitude of the floating carrier platform.

[0008] As a further description of the above technical solution, the multiple water-permeable holes on the side wall of the outer shell are located below the water surface to introduce seawater to reduce energy consumption and load. The array of water-permeable holes above the water surface constitutes an exhaust zone, which is used to discharge air from the auxiliary air chamber, facilitating the discharge of water from the auxiliary air chamber.

[0009] As a further description of the above technical solution, the floating carrier platform maintains its static balance through a circumferentially evenly distributed layout of multiple built-in oscillating power generation systems, and the auxiliary air chamber can simultaneously play a role in stabilizing the floating carrier platform.

[0010] As a further description of the above technical solution, the side wall of the outer shell is fixedly connected with multiple anchor chain fixing seats, and each of the multiple anchor chain fixing seats is fixedly connected with an anchor chain. The anchor chain is connected with an anchor block, and the floating carrier platform is stably moored on the sea surface through the anchor chain and the anchor block.

[0011] As a further description of the above technical solution, at least two built-in oscillator power generation systems are provided. Each built-in oscillator power generation system includes a mass block, a variable stiffness elastic element, and a linear generator set. The mass block is installed in a closed shell through the elastic element. The shell is installed in the equipment compartment and configured to reciprocate vertically relative to the floating carrier platform to drive the built-in oscillator power generation system to generate electricity. The linear generator set is a permanent magnet linear generator, which consists of a direct shaft, a stator, and a mover. The stator is fixedly installed on the inner wall of the shell. The mover is fixedly connected to the mass block. The mass block is connected to the variable stiffness elastic element, which provides elastic support to the mass block, allowing the mover to reciprocate linearly along the axis of the direct shaft under the action of wave energy.

[0012] As a further description of the above technical solution, the built-in oscillator power generation system constitutes a dynamic vibration absorber for the floating carrier platform. The mass parameters of the mass block, the stiffness parameters of the elastic element, and the electromagnetic damping coefficient of the linear generator assembly are configured to match the natural frequency of the built-in oscillator power generation system with the resonant frequency of the floating carrier platform, thereby suppressing the heave motion response of the floating carrier platform and increasing the relative displacement of the oscillating water column in the air chamber relative to the floating carrier platform.

[0013] As a further description of the above technical solution, the floating carrier platform is also equipped with an integrated control module. The integrated control module connects the built-in oscillator power generation system and the air turbine generator set. The integrated control module adjusts the electromagnetic damping coefficient of the built-in oscillator power generation system in real time according to the air pressure sensor data in the air chamber and the motion state of the floating carrier platform, so as to maximize the power output under different sea conditions.

[0014] Beneficial effects Compared with the prior art, the present invention has the following significant advantages: 1. Wideband energy harvesting: By integrating a built-in oscillator, the energy harvesting frequency range of the wave energy power generation system is increased. Dynamic adjustment is achieved through the characteristics of variable damping, ensuring that the system is in an optimal working state under different wave conditions.

[0015] 2. Synergistic Gain: The built-in oscillator power generation system is both an auxiliary power generation unit and a dynamic vibration absorber. By suppressing platform movement, it increases the relative displacement and air pressure energy of the water column in the OWC air chamber relative to the floating carrier platform, achieving a dual efficiency improvement.

[0016] 3. High reliability: The core power generation components are completely sealed in the side wall cavity, which protects them from seawater corrosion and biological adhesion. At the same time, the linear generator set eliminates the need for a complex mechanical transmission mechanism, reducing the failure rate and friction loss.

[0017] 4. Deep-sea space sharing: By utilizing the space of the OWC buoyancy bulkhead to install the oscillating body system, structural and mooring costs are shared, significantly reducing the unit power cost of deep-sea wave energy development. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a composite wave energy power generation device based on the motion control of a built-in oscillator proposed in this invention. Figure 2 This is a schematic diagram of another embodiment of a composite wave energy generation device based on the motion control of a built-in oscillator proposed in this invention. Figure 3 This invention proposes a composite wave energy generation device based on the motion control of a built-in oscillator. Figure 1 A sectional view; Figure 4 This invention proposes a composite wave energy generation device based on the motion control of a built-in oscillator. Figure 2 A sectional view; Figure 5 This invention proposes a composite wave energy generation device based on the motion control of a built-in oscillator. Figure 4 Top view; Figure 6 This is an installation effect diagram of the built-in oscillator power generation system in the equipment compartment of a composite wave energy power generation device based on built-in oscillator motion control proposed in this invention. Figure 7 This is a rendering of the anchor chain and anchor block mooring floating carrier platform in a composite wave energy power generation device based on built-in oscillator motion control proposed in this invention. Figure 8 This is a structural diagram of the linear generator in the built-in oscillator power generation system of a composite wave energy power generation device based on built-in oscillator motion control proposed in this invention.

[0019] In the diagram: 1. Deck; 2. Outer shell; 3. Anchor chain fixing seat; 4. Air turbine generator set; 5. Water inlet; 6. Bulkhead; 7. Cooling pipe; 9. Built-in oscillator power generation system; 10. Inner shell; 11. Equipment compartment; 12. Auxiliary air chamber; 13. Exhaust area; 14. Water inlet. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: The purpose of this invention is to overcome the problems of narrow energy harvesting bandwidth, poor external structural stability, and insufficient space utilization in existing single wave energy conversion technologies. Therefore, this invention aims to provide an integrated wave energy conversion system combining a floating wave energy harvester (OWC) and an array-based built-in oscillator power generation system. This system introduces an active tuning mechanism and collaborative control logic, enabling the built-in oscillator to act as a dynamic vibration absorber to suppress platform motion while simultaneously matching random wave frequencies in real time. This creates a more favorable working environment for the OWC and, through synergistic optimization with the OWC's pressure damping, achieves cost sharing, efficient energy harvesting, and safe coexistence across all sea conditions. This results in the creation of a composite wave energy generation device based on the motion control of the built-in oscillator.

[0022] This invention achieves the above objectives through two technical approaches: integrated layout and motion control. The technical solutions adopted are as follows: For technical solutions regarding integrated layout, please refer to the appendix. Figure 1-8 This system includes a floating carrier platform, The floating platform consists of an air turbine generator set 4 and multiple built-in oscillating body power generation systems 9. The floating platform is composed of an inner shell 10 and an outer shell 2. Multiple anchor chain fixing seats 3 are fixedly connected to the side walls of the outer shell 2. Each anchor chain fixing seat 3 is fixedly connected to an anchor chain, and the anchor chain is connected to an anchor block. The floating platform is stably moored on the sea surface by the anchor chain and the anchor block, thus forming a three-dimensional mooring, which allows the floating platform to be deployed in various marine environments. The upper ends of the inner shell 10 and the outer shell 2 are fixedly connected to a deck 1, and the lower ends of the inner shell 10 and the outer shell 2 are fixedly connected to an annular base. The bottom of the inner shell 10 is open to the seawater to form an oscillating water column. The free liquid surface of the water column, the inner shell 10, and the deck 1 form an air chamber. The air turbine generator set 4 is installed at the center of the deck 1. The air turbine generator set 4 absorbs and converts the reciprocating airflow in the air chamber in real time, and converts the airflow energy generated by the movement of the oscillating water column in the air chamber into electrical energy. Multiple partitions 6 are fixedly connected between the inner shell 10 and the outer shell 2, dividing the interior of the floating platform into multiple completely sealed equipment compartments 11. These compartments 11 are evenly distributed between the inner shell 10 and the outer shell 2, and the deck 1 and annular base form a sealed space. This provides the buoyancy required for the floating platform on the water surface and allows multiple built-in oscillator power generation systems 9 to be installed within the compartments 11. These systems can reciprocate vertically relative to the floating platform, converting inertial kinetic energy into electrical energy through a reciprocating linear motion that lags behind the platform. As the core power generation component, these systems are completely sealed within the compartments 11, protecting them from seawater corrosion and biofouling. Furthermore, the use of linear generators eliminates the need for complex mechanical transmission mechanisms, reducing failure rates and friction losses. The use of the OWC buoyancy chamber space to house the oscillator system achieves shared structural and mooring costs, significantly reducing the unit power cost of deep-sea wave energy development.

[0023] At this time, the built-in oscillator power generation system 9 can work with the air turbine generator set 4 to generate electricity simultaneously, so that the floating carrier platform can reasonably integrate the two power generation devices to generate electricity efficiently. With an integrated layout scheme, it realizes the innovative idea of ​​cost sharing, efficient energy capture and safe coexistence under all sea conditions.

[0024] For technical solutions regarding motion control, please refer to the appendix. Figure 1-8 This is mainly achieved through the auxiliary air chamber 12, the water permeable hole 5, and the integrated control module. The specific technical solution is as follows: By making full use of the auxiliary air chamber 12 formed between two adjacent equipment compartments 11, a water inlet 14 communicating with the auxiliary air chamber 12 is provided on the side wall of the annular base. The auxiliary air chamber 12 is open to seawater, allowing seawater to freely enter and exit. Multiple water-permeable holes 5 on the side wall of the outer shell 2 are located below the water surface to introduce seawater for energy consumption and load reduction. The array of water-permeable holes 5 above the water surface forms an exhaust zone 13, which is used to exhaust air from the auxiliary air chamber 12, creating a wave-damping and load-reducing water body inside the auxiliary air chamber 12. At this time, the same number of auxiliary air chambers 12 as the equipment compartment 11 can be formed on the floating carrier platform. After fully considering the buoyancy required for the platform from above, the remaining space is configured as auxiliary air chambers 12 that can store water. Since a certain amount of flowing seawater will be stored in the auxiliary air chamber 12, it can form a ballast effect, that is, the water surface inside will float according to the wave fluctuation. Since the water inlet 14 and the water permeable holes 5 on the side are less than the seawater inlet and outlet speed in the air chamber, the swaying amplitude of the floating carrier platform can be limited, thereby reducing the pitching of the floating carrier platform.

[0025] like Figure 2 and Figure 4As shown, the side wall of the outer shell 2 is provided with multiple matrix-arranged water-permeable holes 5. The water-permeable holes 5 can dissipate the energy of the incident wave. In addition, the water-permeable holes 5 guide seawater into the auxiliary air chamber 12 and together with the seawater entering from the inlet 14, they form a load-reducing water column in the auxiliary air chamber 12, which can reduce the impact of seawater on the floating carrier platform and reduce the lateral sway amplitude of the floating carrier platform. When the wave comes into contact with the outer shell 2, it will naturally form an impact force. At this time, the array-arranged water-permeable holes 5 can pass through some seawater into the auxiliary air chamber 12, thereby forming a load-reducing water column and reducing the impact on the floating carrier platform.

[0026] The floating platform designed in this technical solution has an overall cylindrical structure, but it can also have other structures, such as rectangular, semi-circular, elliptical, and other geometric structures. Taking the cylindrical structure as an example, this technical solution uses multiple built-in oscillating power generation systems 9 evenly distributed around the circumference to absorb wave energy in all directions to maintain the static balance of the floating platform. At the same time, the water column generated by the auxiliary air chamber 12, which lags behind the load reduction column in the floating platform, can simultaneously play a role in stabilizing the floating platform.

[0027] When implementing this technical solution, Figure 1 As a technical solution, it can be applied to sea areas with good sea conditions. It can reduce the lateral sway amplitude of the floating carrier platform simply by relying on multiple built-in oscillator power generation systems 9.

[0028] like Figure 2 As an alternative technical solution, it can be applied to sea areas with variable and relatively harsh sea conditions. At this time, multiple built-in oscillating power generation systems 9 and the load-reducing water column formed in the innovatively designed auxiliary air chamber 12 can be used to achieve the purpose of reducing the lateral sway amplitude of the floating carrier platform. The specific implementation can be carried out according to the technical solution described above.

[0029] like Figure 7 and Figure 8 As shown, at least two built-in oscillator power generation systems 9 are provided. Each built-in oscillator power generation system 9 includes a mass block, a variable stiffness elastic element, and a linear generator set. The mass block is installed in a closed shell through the elastic element. The shell is installed in the equipment compartment 11 and is configured to reciprocate vertically relative to the floating carrier platform to drive the built-in oscillator power generation system 9 to generate electricity. The linear generator set is a permanent magnet linear generator, which consists of a direct shaft, a stator, and a mover. The stator is fixedly installed on the inner wall of the shell, and the mover is fixedly connected to the mass block. The mass block is connected to the variable stiffness elastic element. The variable stiffness elastic element provides elastic support to the mass block, so that the mover reciprocates linearly along the axis of the direct shaft under the action of wave energy.

[0030] In this technical solution, the built-in oscillator power generation system 9 constitutes the dynamic vibration absorber of the floating carrier platform. The mass parameters of the mass block, the stiffness parameters of the elastic element, and the electromagnetic damping coefficient of the linear generator assembly are configured to match the natural frequency of the built-in oscillator power generation system 9 with the resonant frequency of the floating carrier platform, so as to suppress the heave motion response of the floating carrier platform and increase the relative displacement of the oscillating water column in the air chamber relative to the floating carrier platform.

[0031] Secondly, the floating platform is also equipped with an integrated control module, which is electrically connected to the built-in oscillator power generation system 9 and the air turbine generator set 4. The integrated control module adjusts the electromagnetic damping coefficient of the built-in oscillator power generation system 9 in real time according to the air pressure sensor data in the air chamber and the motion state of the floating platform, so as to maximize the power output of the built-in oscillator power generation system 9 under different sea conditions.

[0032] The integrated control module executes the following collaborative control logic: 1. Damping synergy optimization: Real-time monitoring of air pressure fluctuations in the air chamber and the output power of the linear generator set. By adjusting the electromagnetic damping of the linear generator set and the aerodynamic damping of the air turbine generator set 4, a better damping ratio is found between suppressing the violent heave of the floating carrier platform and directly capturing mechanical energy. II. Extreme Sea State Risk Avoidance Mode: When extreme waves exceeding the set threshold are detected, the integrated control module increases the electromagnetic damping of the linear generator set to a locked state, making the mass block a stable ballast for the platform, while adjusting the air turbine to relieve pressure, ensuring the overall safety of the device.

[0033] The power generation process of this system involves two energy conversion paths: Firstly, the built-in oscillator power generation system 9 directly drives power generation. When the floating main platform experiences heaving or rolling motion due to wave action, the platform's motion serves as the excitation source, transmitted to the mass block via elastic elements. Due to the mass block's significant inertia, its motion lags behind the platform, resulting in relative reciprocating motion between the mass block and the platform. During this process, the mover connected to the mass block reciprocates linearly relative to the fixed stator. The magnetic field generated by the mover (permanent magnet) cuts the stator windings or causes periodic changes in the magnetic flux passing through them. Based on the principle of electromagnetic induction, an induced electromotive force is generated at both ends of the stator windings, directly converting mechanical vibration energy into electrical energy output. The elastic elements store and release energy during compression and stretching, maintaining the system's continuous oscillation.

[0034] Secondly, regarding system coupling and OWC enhancement, this invention optimizes the mass parameters of the mass block and the stiffness coefficient of the variable elastic element to tune the natural frequency of the built-in oscillator power generation system 9 to a wave frequency close to that of typical sea states. In this state, the built-in oscillator power generation system 9 acts as a dynamic vibration absorber in structural dynamics. It effectively absorbs the vibration energy of the floating main platform, significantly suppressing the platform's own heave amplitude and maintaining relative stability in the waves. Because the motion amplitude of the floating main platform is reduced, while external waves still drive the water column movement within the central air chamber, the relative velocity and displacement of the water column relative to the platform increase significantly. This effect greatly enhances the air pressure energy within the central air chamber (i.e., increases the air chamber's work potential), thereby significantly improving the power generation efficiency of the air turbine generator set 4.

[0035] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite wave energy power generation device based on built-in oscillator motion control, comprising a floating carrier platform, an air turbine generator set (4), and multiple built-in oscillator power generation systems (9), characterized in that, The floating carrier platform consists of an inner shell (10) and an outer shell (2). The upper ends of the inner shell (10) and the outer shell (2) are fixedly connected to a deck (1). The lower ends of the inner shell (10) and the outer shell (2) are fixedly connected to an annular base. The bottom of the inner shell (10) is permeated with seawater to form an oscillating water column. The free liquid surface of the oscillating water column, the inner shell (10), and the deck (1) constitute an air chamber. The air turbine generator set (4) is installed at the center of the deck (1) and uses the air turbine generator set (4) to convert the airflow energy generated by the oscillating water column movement in the air chamber into electrical energy. Multiple partitions (6) are fixedly connected between the inner shell (10) and the outer shell (2). The partitions (6) divide the interlayer of the floating carrier platform into multiple completely sealed equipment compartments (11). An auxiliary air chamber (12) is formed between two adjacent equipment compartments (11). Multiple built-in oscillator power generation systems (9) are installed in multiple equipment compartments (11) respectively. They can reciprocate relative to the floating carrier platform in the vertical direction. The built-in oscillator power generation system (9) constitutes the dynamic vibration absorber of the floating carrier platform. The built-in oscillator power generation system (9) converts inertial kinetic energy into electrical energy by reciprocating linear motion that lags behind the floating carrier platform. Multiple equipment compartments (11) are evenly distributed between the inner shell (10) and the outer shell (2), and the deck (1) and the annular base form a sealed space to provide the buoyancy required for the floating carrier platform on the water surface. The side wall of the annular base is provided with an inlet (14) that communicates with the auxiliary air chamber (12). The inlet (14) is open to seawater, allowing seawater to freely enter and exit the auxiliary air chamber (12). The side wall of the outer shell (2) is provided with multiple matrix-arranged permeable holes (5). The permeable holes (5) guide seawater into the auxiliary air chamber (12) and together with the seawater entering through the inlet (14), they form a wave-damping and load-reducing water body in the auxiliary air chamber (12), which can reduce the impact of seawater on the floating carrier platform and reduce the lateral sway amplitude of the floating carrier platform. The multiple water-permeable holes (5) on the side wall of the outer shell (2) are located below the water surface to introduce seawater to reduce energy consumption and load. The array of water-permeable holes (5) above the water surface constitutes an exhaust zone (13). The air in the auxiliary air chamber (12) is discharged through the exhaust zone (13), which facilitates the discharge of water from the auxiliary air chamber (12).

2. The composite wave energy generation device based on built-in oscillator motion control according to claim 1, characterized in that: The floating carrier platform maintains its balance through a circumferentially evenly distributed layout of multiple built-in oscillating power generation systems (9), while the auxiliary air chamber (12) simultaneously plays a role in stabilizing the floating carrier platform.

3. A composite wave energy generation device based on built-in oscillator motion control according to claim 1, characterized in that: Multiple anchor chain fixing seats (3) are fixedly connected to the side wall of the outer shell (2). Each of the multiple anchor chain fixing seats (3) is fixedly connected to an anchor chain. The anchor chain is connected to an anchor block. The floating carrier platform is stably moored on the sea surface through the anchor chain and the anchor block.

4. A composite wave energy generation device based on built-in oscillator motion control according to claim 1, characterized in that: At least two built-in oscillator power generation systems (9) are provided. Each built-in oscillator power generation system (9) includes a mass block, a variable stiffness elastic element, and a linear generator set. The mass block is installed in a closed shell through the variable stiffness elastic element. The shell is installed in the equipment compartment (11) and is configured to reciprocate vertically relative to the floating carrier platform to drive the built-in oscillator power generation system (9) to generate electricity. The linear generator set is a permanent magnet linear generator. The permanent magnet linear generator consists of a straight shaft, a stator, and a mover. The stator is fixedly installed on the inner wall of the shell. The mover is fixedly connected to the mass block. The mass block is connected to the variable stiffness elastic element. The variable stiffness elastic element provides elastic support to the mass block, so that the mover reciprocates linearly along the axial direction of the straight shaft under the action of wave energy.

5. A composite wave energy generation device based on built-in oscillator motion control according to claim 4, characterized in that: The mass parameters of the mass block, the stiffness parameters of the variable stiffness elastic element, and the electromagnetic damping coefficient of the linear generator assembly are configured such that the natural frequency of the built-in oscillator power generation system (9) matches the resonant frequency of the floating carrier platform, thereby suppressing the heave motion response of the floating carrier platform and increasing the relative displacement of the air chamber oscillating water column relative to the floating carrier platform.

6. A composite wave energy generation device based on built-in oscillator motion control according to claim 1, characterized in that: The floating carrier platform is also equipped with an integrated control module, which connects the built-in oscillator power generation system (9) and the air turbine generator set (4). The integrated control module adjusts the electromagnetic damping coefficient of the built-in oscillator power generation system (9) in real time according to the air pressure sensor data in the air chamber and the motion state of the floating carrier platform, so as to maximize the power output.

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