CN114645817A - Coupling power generation system and method of multi-degree-of-freedom wave energy float and semi-submersible floating wind turbine - Google Patents

Abstract

The invention discloses a power generation technology for coupling ocean wave energy and wind energy, in particular to a system and a method for coupling a multi-degree-of-freedom wave energy floater with a semi-submersible floating type fan to generate power, wherein the power generation system comprises a semi-submersible floating type platform, a wind power generation mechanism is arranged at the center of the upper part of the semi-submersible floating type platform, and the multi-degree-of-freedom wave energy floater is arranged on the semi-submersible floating type platform at the periphery of the wind power generation mechanism; the wind power generation mechanism and the multi-degree-of-freedom wave energy floater are controlled by the central control system. During power generation, the central control system monitors the quality of the power generated by the wind driven generator in real time, compares the quality with the rated parameters of the device, automatically converts the difference into the control parameters of the wave energy power generation device, adjusts the power generation behavior of the wave energy power generation device, achieves the effect of complementing the output power of the wave energy power generation device and the output power of the wind driven generator, and enables the quality of the power output by the central control system to be closer to the rated parameters, so that the wind wave coupling power generation system can generate richer and higher-quality power.

Description

Coupling power generation system and method of multi-degree-of-freedom wave energy float and semi-submersible floating wind turbine

technical field

The invention relates to a power generation technology for coupling ocean wave energy and wind energy, in particular to a coupling power generation system and method for ocean multi-degree-of-freedom wave energy and a semi-submersible wind turbine.

Background technique

With the improvement of human productivity, the demand for energy in social production and life is increasing. At present, the energy supply of mankind is dominated by fossil energy, but the reserves of fossil energy are limited, and the greenhouse gases emitted by a large number of burning fossil energy have caused huge damage to the earth's ecological civilization. Under the background of increasingly tight energy supply and increasingly severe climate change, the development and utilization of renewable and clean energy has been paid more and more attention. The vast ocean contains a huge amount of marine wind energy and wave energy. At present, the offshore fixed wind power generation technology has become mature, and the offshore wind power generation is developing in the direction of floating wind turbines; the wave energy power generation technology has been developed for decades. Great progress has also been made. The current development direction is to reduce the engineering cost and improve the survival reliability of the device.

Most of the existing offshore wind turbines are of fixed foundation type, and only fixed wind turbine carrying platforms can be built in offshore areas, and only limited offshore wind energy is developed. Most of the existing wave energy power generation devices use the single-degree-of-freedom energy harvesting technology, and the devices are basically arranged independently, and there is no engineering practice combined with offshore wind turbines. Among the proposed wind-wave coupling concept models, the combination of large-scale single-degree-of-freedom heave wave energy floats and outrigger oscillating floats with wind turbines is the mainstay.

Most of the existing wave power generation and wind power generation devices operate independently, and they need to build and install bases respectively, which makes the development and maintenance costs of wave power generation and offshore wind power generation relatively high. At present, wave energy power generation and offshore wind power generation are mainly in the shallow sea. The wave energy and wind energy resources in the shallow sea are not as rich as those in the deep sea, and the quality of the resources is also slightly worse. Moreover, the development of wave energy and wind energy in the shallow sea has a greater impact on fishery production and other activities. Large negative impact, after entering the deep sea to develop wave and wind energy, the economic cost of fixed foundations is too high. The wind-wave coupling development devices under trial operation at home and abroad mainly focus on the single-degree-of-freedom energy harvesting of wave energy. The single-degree-of-freedom wave energy power generation device has poor adaptability to wave conditions, and the motion response amplitude is too large when the wave is large, which makes the manufacturing of the device difficult. Maintenance is more difficult.

Chinese invention patent application CN 105781899 A discloses an offshore wind and wave integrated power plant, which is composed of power generation modules connected by connecting pieces; wherein the power generation modules include: a platform, the platform floats on the sea; a wind energy absorption conversion unit, wind energy absorption conversion unit The unit is arranged on the platform; the wave energy collection and conversion unit, the wave energy collection and conversion unit is arranged on the platform; the hydraulic energy generation unit, the hydraulic energy generation unit is arranged on the platform, and the hydraulic energy generation unit is respectively connected with the wind energy absorption conversion unit and the wave energy collection unit. Conversion unit connection. The wave energy power generation device involved in the application has a cantilever outstretching float, and the cantilever hinge shaft is subjected to lateral force on one side under the action of the wave, which is prone to structural failure due to excessive torque; the hydraulic pipe of the wave energy power generation device involved in the application The road is complicated and long, and the loss is large in the process of energy transfer.

Chinese invention patent application CN 113202699 A discloses a floating platform-based wind energy-wave energy power generation device, including: a wind power generation assembly, a floating platform, and a wave energy power generation assembly; the wind power generation assembly is arranged on the platform of the floating platform; The circumference of the floating platform is evenly arranged with several wave energy power generation components; the wave energy generation components can be adjusted in height according to the height of the wave; there is a pendulum power generation mechanism in the float, which drives the pendulum to make a circular motion through the fluctuation of the float. to generate electricity. The wave energy power generation device involved in this application has a cantilever outstretched float, and the cantilever hinge shaft is subjected to lateral force on one side under the action of waves, which is prone to structural failure due to excessive torque; the wind energy-wave energy generation device involved in the application Wind energy and wave energy are independently generated. Due to the randomness of wind and wave resources, the power quality is not easy to control.

Chinese invention patent application CN 112780483 A discloses a new type of self-adaptive heave, sway and oscillate float type wave energy power generation device, including a small float, a limit device, a single column, a rotor, an electromagnetic coil, a driving gear, a tooth slot, a first A gear train device, a second gear train device and a generator, a limit device is arranged in the small float, and a single column is connected to the lower side of the limit device, the outer side of the single column is provided with a rudder, and the single column is A first shaft is installed on its lower end, and the first shaft is connected to the fixing table. The wave energy power generation device involved in this application is a separate wave energy power generation device with high cost; the wave energy power generation device involved in this application has a gear transmission mechanism to work underwater, and it is difficult to prevent corrosion and maintain.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a coupling power generation system and method of a multi-degree-of-freedom wave energy float and a semi-submersible floating fan in order to overcome the above-mentioned deficiencies of the prior art.

To achieve the above object, the present invention adopts the following technical solutions:

A multi-degree-of-freedom wave energy float and a semi-submersible floating fan coupled power generation system, comprising a semi-submersible floating platform, a wind power generation mechanism is installed in the upper center of the semi-submersible floating platform, and a semi-submersible floating type outside the wind power generation mechanism is installed. The multi-degree-of-freedom wave energy float is installed on the platform; the wind power generation mechanism and the multi-degree-of-freedom wave energy float are controlled by the central control system;

The multi-degree-of-freedom wave energy float includes a vertical guide column installed on the semi-submersible floating platform, a guide rail is vertically installed on the inner side of the vertical guide column, and a slider that can slide freely along the guide rail is clamped. The block is rotatably connected with the rotating shaft on the wave energy float, and the wave energy float moves with two degrees of freedom relative to the semi-submersible floating platform; the top of the wave energy float is hinged with the bottom of a plurality of piston rods, and the piston rods One end is connected with the piston through the ball bearing, the piston is axially matched with the hydraulic cylinder, and the heave and pitch motions of the wave energy float under the action of waves are converted into the axial sliding of the piston inside the hydraulic cylinder; The liquid inlet and outlet are respectively connected with the low-pressure accumulator and the high-pressure accumulator. The high-pressure accumulator is connected with the liquid inlet of the hydraulic motor through the pipeline. The hydraulic motor is connected with the generator and can drive it to do work and generate electricity. The liquid outlet of the motor communicates with the liquid inlet of the low pressure accumulator.

The semi-submersible floating platform includes three floating legs respectively arranged on the three included angles of an equilateral triangle, the three floating legs are connected by cross braces, and the three floating legs are connected to a central column located in the center of the triangle. Connected by diagonal braces.

The wind power generation mechanism is installed on the upper part of the central column.

Each floating leg is connected to a mooring line for anchoring in the deep sea.

Each two floating pile legs are connected by two upper and lower parallel horizontal braces, and the two horizontal braces are connected by two parallel vertical guide columns; the upper horizontal brace is provided with a support portion fixed on it, and the support portion A low-pressure accumulator, a high-pressure accumulator, a hydraulic motor and a generator are installed on it.

There are three groups of the multi-degree-of-freedom wave energy floats, which are respectively installed between two adjacent floating legs.

The wave energy float, the piston rod and the hydraulic cylinder are all located in the space between the two transverse braces and the two vertical guide columns.

The central control system is arranged at the bottom of the tower of the wind power generating mechanism.

The power generated by the wind power generation mechanism and the multi-degree-of-freedom wave energy float is fed into the central control system, which outputs the electric energy through the main cable.

The power generation method of the multi-degree-of-freedom wave energy float and the semi-submersible floating wind turbine coupling power generation system, including:

After the coupling power generation system is installed and activated, the offshore wind power generation mechanism generates power under the drive of the wind, and the electric energy is connected to the central control system. The parameters are compared with the rated parameters of the system, and the adjustment scheme is automatically calculated, and the adjustment scheme is further converted into the hydraulic release pressure control parameters of the high-voltage accumulator, so as to change the output power, voltage and current parameters of the wave energy power generation device;

The heave and pitch motion of the wave energy float under the action of waves is converted into the axial slip of the piston inside the hydraulic cylinder; when the piston moves downward, the hydraulic oil in the low pressure accumulator is pumped into the hydraulic cylinder, when When the piston moves upward, the hydraulic oil in the hydraulic cylinder is squeezed into the high-pressure accumulator, and the wave energy is converted into hydraulic energy through the multi-degree-of-freedom motion of the wave energy float and stored in the high-pressure accumulator;

When the pressure value in the high-pressure accumulator reaches the release pressure value set by the central control system, the high-pressure oil will be released and flow to the hydraulic motor along the pipeline. , the hydraulic oil that has completed the work will flow back to the low-pressure accumulator along the pipeline, thus completing a wave power generation cycle;

The electric energy generated by the wave power generation device is also fed into the central control system, complemented and integrated with the electric energy obtained by the wind turbine, and then fed into the power grid through the main cable.

The semi-submersible floating platform of the present invention is provided with three groups of vertical guide piles in the circumferential direction for installing the slider guide rail device, and one wave energy float is placed in each group of vertical guide piles, and the wave energy float can be energized under the limitation of the slider guide rail device. Relative to the semi-submersible platform, the motion of two degrees of freedom, heave and pitch, occurs. Each wave energy float is connected with three pistons through three piston rods, wherein the piston rod is hingedly connected with the float, and is connected with the piston through a ball bearing, which conforms to the motion characteristics and force characteristics of both ends of the piston rod.

Under the action of waves, the float can drive the pistons to move axially in the hydraulic cylinder, thereby driving the hydraulic oil to circulate between the high-pressure accumulator and the low-pressure accumulator. The hydraulic oil is pumped into the high-pressure accumulator from the low-pressure accumulator under the movement of the piston. When the pressure in the high-pressure accumulator reaches the release pressure value set by the central control system, the hydraulic oil will be released and flow through the hydraulic motor and then return to the low pressure. Accumulator, the hydraulic motor will rotate under the drive of hydraulic oil to drive the generator to generate electricity.

The wind turbine is installed on the central column of the semi-submersible platform, and a central control system is installed at the bottom of the wind turbine tower. The energy generated by the wave energy and the energy generated by the wind turbine are fed into the central control system and output by the main cable.

When using the above wind-wave coupling power generation system to generate electricity, its central control system can monitor the quality of the energy generated by the wind turbine in real time, including its power, voltage and frequency, and compare it with the rated parameters of the device, and automatically convert the difference into wave energy. The control parameters of the power generation device (such as the release pressure value of the high-voltage accumulator, the flow value of the hydraulic circuit, etc.), so as to adjust the power generation behavior of the wave energy power generation device, so as to achieve the complementary effect of the electric energy output by the wave energy generation device and the output electric energy of the wind turbine, The quality of the power output by the central control system is closer to the rated parameters, so that the wind-wave coupling power generation system can produce more abundant and higher-quality power.

Compared with the technical solution of the patent application in the background art, the wave energy float is safer without an overhang structure, the wave energy power generation device has a compact structure, and the hydraulic layout is more reasonable; More secure; wind energy and wave energy power generation devices share support and mooring devices, and the unit construction cost is lower; the moving parts of wave energy power generation devices are far away from the water surface, and the maintenance difficulty is greatly reduced.

Compared with the prior art, the present invention has the following advantages:

(1) Compared with separate offshore wind and wave power generation devices, the wind-wave coupled power generation system of the present invention can greatly reduce infrastructure investment and effectively reduce the operation and maintenance cost of offshore power production under the same installed power.

(2) Compared with the near-shallow sea wind energy and wave energy power generation devices, the wind-wave coupling power generation system of the present invention can obtain higher-quality wind and wave energy resources in the deep sea, and reduce the negative impact on human activities such as fishery production and transportation and navigation.

(3) Compared with the single-degree-of-freedom wave energy power generation device, the wave energy float in the wind-wave coupled power generation system of the present invention can obtain energy through two degrees of freedom movement, the device has a wider range of adaptation to wave conditions, more stable energy acquisition, and energy. Higher utilization efficiency.

(4) Compared with the single-degree-of-freedom wave energy power generation device, the wave energy float in the wind-wave coupling power generation system of the present invention can obtain more wave energy with a smaller motion response, making the device structure more compact and stable, thereby reducing the manufacturing cost. maintenance costs.

(5) Compared with fixed wind energy and wave energy power generation devices, the wind and wave coupling development system of the present invention has obvious cost advantages in the deep sea, and the floating platform can automatically adapt to tide level changes, eliminating the need for wave energy power generation devices. The R&D and manufacturing costs of the adaptive control system eliminate the hidden safety hazards and maintenance costs of the tide level adaptive control system.

(6) Compared with the independent offshore wind energy and wave energy power generation devices, the wind and wave coupled power generation system of the present invention shares a set of semi-submersible floating platform with the wave energy power generation device, and the wave energy power generation device can obtain a more stable operation The wave power generation device can absorb the energy of incident waves near the floating platform, reduce the impact of waves on the floating platform, further increase the stability of the floating platform, and ensure the safe operation of wind turbines and wave power generation devices.

(7) Compared with the floating platform equipped with the outstretched wave power generation device, the wind-wave coupling power generation system of the present invention has a more compact structure, is less likely to be damaged by a large moment in a wind and wave environment, and has a safer structure.

(8) The wind-wave coupled power generation system of the present invention is provided with a central control unit. The central control unit can monitor the electrical energy parameters output by the wind turbine in real time, and automatically generate corresponding control parameters of the power generation behavior of the wave energy device, thereby regulating the power generation of the wave energy device. output power quality.

(9) Compared with the separate offshore wind energy and wave energy power generation devices, the wind and wave coupling power generation system of the present invention can complement the power generated by the two resources, thereby improving the quality of the output power of the system.

(10) The wave energy energy intake mechanism in the wind-wave coupled power generation system of the present invention uses a uniquely designed hydraulic piston rod, which can simultaneously meet the energy conversion requirements of the wave energy float heave and pitch motions.

(11) In the wind-wave coupling power generation system of the present invention, three groups of vertical guide piles are added in the circumferential direction of the submersible floating platform to provide necessary and ingenious installation space for the wave energy float, while enhancing the structural strength of the semi-submersible floating platform.

(12) In the wind-wave coupled power generation system of the present invention, the wave energy power generation device is equipped with a high-pressure accumulator and a low-pressure accumulator, and the hydraulic oil flows out from the high-pressure accumulator, and returns to the low-pressure accumulator after performing work on the hydraulic motor. , Compared with the traditional fuel tank configuration, the low-pressure accumulator can recover the residual energy after the hydraulic oil does work, so that the energy utilization efficiency is higher.

(13) In the wind-wave coupling power generation system of the present invention, one wave energy float is connected to three hydraulic cylinders at the same time. Compared with the wave energy float controlled by only one hydraulic cylinder, the motion attitude of the wave energy float of the present invention is more controllable and connected. The strength is higher, and the movement stroke is smaller under the action of the same wave height, which can make the hydraulic cylinder and the piston rod more compact, and further improve the structural strength.

Description of drawings

Fig. 1 is the front view of the power generation system of the present invention;

Fig. 2 is the top view of the power generation system of the present invention;

Fig. 3 is the axial side view of the power generation system of the present invention;

Figure 4 is a schematic structural diagram of a multi-degree-of-freedom wave energy power generation device;

Figure 5 is a detailed view of the piston and the piston rod;

Fig. 6 is the instantaneous power comparison diagram of wave energy power generation device;

Figure 7 is a comparison diagram of the pitching motion of the wave energy float;

Figure 8 is a comparison diagram of wave energy float heave motion;

Figure 9 is a comparison diagram of the heaving motion of the semi-submersible floating platform;

Figure 10 is a comparison diagram of the pitching motion of the semi-submersible floating platform;

In the figure, 1. mooring cable, 2. semi-submersible floating platform, 3. fan tower, 4. fan blade, 5. fan hub, 6. engine room, 7. wave energy float, 8. piston rod, 9. Hydraulic cylinder, 10. Low pressure accumulator, 11. High pressure accumulator, 12. Hydraulic motor, 13. Generator, 14. Piston, 15. Slide block, 16. Guide rail, 17. Vertical guide pile, 18. Central control System, 19. Main cable.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The structures, proportions, sizes, etc. shown in the accompanying drawings of this specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention. Therefore, Without technical substantive significance, any structural modification, proportional relationship change or size adjustment should still fall within the technology disclosed in the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. content covered. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the present invention without substantially changing the technical content.

As shown in Figure 1-Figure 10, the multi-degree-of-freedom wave energy float and semi-submersible floating fan coupled power generation system includes a semi-submersible floating platform 2, and a wind power generation mechanism is installed at the upper center of the semi-submersible floating platform 2, and wind power generates electricity. A multi-degree-of-freedom wave energy float is installed on the semi-submersible floating platform outside the mechanism; both the wind power generation mechanism and the multi-degree-of-freedom wave energy float are controlled by the central control system.

The semi-submersible floating platform 2 is anchored in the deep sea by three mooring cables 1, and serves as a carrying platform for offshore wind turbines and wave power generation devices.

The tower 3 of the offshore wind turbine is installed on the central column of the semi-submersible floating platform 2, a nacelle 6 is installed on the top of the tower 3, a fan hub 5 is installed at the front end of the nacelle 6, and three fan blades 4 are installed on the fan hub 5 Therefore, the fan blades 4 can drive the fan hub 5 to rotate under the blowing of the wind, and then drive the generator in the engine room 6 to rotate and generate electricity, thus completing the process of generating electricity from offshore wind energy.

The semi-submersible floating platform 2 is mainly composed of three large floating legs and some horizontal braces and diagonal braces. Three sets of vertical guide piles 17 are evenly added between the horizontal braces in the circumferential direction as the installation of wave energy floats. The frame, each group of vertical guide piles is distributed in the middle of the circumferential transverse support of the semi-submersible floating platform 2 . A set of guide rails 15 are fixedly installed on the inner side of the vertical guide pile 17 , and the slider 16 can slide vertically along the guide rails 15 .

The wave energy float 7 is connected with the slider 16 through the rotating shaft, so the wave energy float 7 can rotate relative to the slider 16, then under the limitation of the slider guide device, the wave energy float 7 can be vertical relative to the semi-submersible floating platform 2. Motion with two degrees of freedom, sway and pitch.

The top of the wave energy float 7 is connected with the three piston rods 8 by means of articulation, and the other end of the piston rod 8 is connected with the piston 14 through the ball bearing. The heaving and pitching motions are cleverly converted into the axial slip of the piston 14 inside the hydraulic cylinder 9, and the float can drive the piston to move axially in the hydraulic cylinder under the action of waves.

The wave energy power generation device also includes a set of high-pressure accumulators 11 and a set of low-pressure accumulators 10. Both sets of accumulators are connected to the hydraulic cylinder 9, and the release pressure of the high-pressure accumulator 11 can be adjusted to realize the wave energy float. control of the movement and power generation behavior of the device. The wave energy power generation device further includes a hydraulic motor 12 , which can drive the generator to work and generate electricity under the drive of hydraulic oil released from the high-pressure accumulator 11 .

When the piston 14 moves downward, the hydraulic oil in the low-pressure accumulator 10 will be pumped into the hydraulic cylinder 9; when the piston 14 moves upward, the hydraulic oil in the hydraulic cylinder 9 will be squeezed into the high-pressure accumulator 11 , so far the wave energy is converted into hydraulic energy through the multi-degree-of-freedom motion of the wave energy float 7 and stored in the high-pressure accumulator 11 . When the pressure value in the high-pressure accumulator 11 reaches the release pressure value set by the central control system 18, the high-pressure oil will be released and flow to the hydraulic motor 12 along the pipeline, and the hydraulic motor 12 will be driven by the high-pressure oil to rotate with The generator 13 generates power, and the hydraulic oil after the work is completed will flow back to the low-pressure accumulator 10 along the pipeline, thus completing a wave power generation cycle. The central control system can control the release pressure of the high-pressure accumulator 11 in the wave energy power generation device and the flow in the hydraulic pipeline, so as to automatically switch the power generation and energy storage states of the wave energy power generation device and adjust the rotational speed of the hydraulic motor during power generation, and then The electric energy output by the wave energy power generation device and the output electric energy of the wind turbine are complementary to improve the power quality.

The power generation method of the coupled power generation system is as follows: after the above-mentioned coupled power generation system is installed and activated, the offshore wind turbine generates power under the driving of the wind, and the power is connected to the central control system 18. The central control system 18 will detect the power quality of the wind power, including parameters such as voltage, power, current and frequency, and compare the parameters with the rated parameters of the system to automatically calculate the adjustment scheme, and further convert the adjustment scheme into control parameters such as the hydraulic release pressure of the high-pressure accumulator 11, so as to change the wave energy The output power, voltage, current and other parameters of the generator. The electric energy generated by the wave power generation device is also fed into the central control system 18, and after complementary integration with the electric energy obtained by the wind turbine, it is fed into the power grid through the main cable 19, which makes the production and management of offshore electric energy more convenient. Through the regulation of this power generation method, the coupled power generation system can obtain higher-quality and more abundant power than separate offshore wind power generation and wave power generation.

In order to verify the advantages of the multi-degree-of-freedom wave energy float and semi-submersible wind turbine coupled power generation system in terms of wave energy generation power and restraining the movement of the float and the platform, the following calculations are made: If the wave energy float is applied with the following formula (1) Linear PTO damping force

F=cv(1)

In the formula, F represents the PTO reaction force, c represents the linear damping coefficient, and v represents the moving speed of the float in the heave or pitch direction.

When linear damping with damping coefficients of 60000N/(m/s) and 60000N.m/(rad/s) is applied in the heave direction and pitch direction respectively, the wave height of 1.6m and the wave period of 6s are applied. The power generation of the power generation device is greater than that when the single-degree-of-freedom wave-energy float is coupled with the semi-submersible floating wind turbine. Compared with the wave energy float of 32 kW with only heave degree of freedom and 1.5 kW with only pitching degree of freedom; the motion amplitude of the float is smaller in the case of multi-degree-of-freedom coupling, as shown in Figures 7 and 8, the multi-degree-of-freedom The amplitudes of the heave motion and pitch motion of the wave energy buoy are both reduced by 5% compared with the case of a single degree of freedom; compared with the case of only the semi-submersible floating fan, the heave and pitch motions of the semi-submersible floating platform are also greatly reduced. decrease, as shown in Figure 9 and Figure 10, in the case of wind and wave coupling, the heave motion amplitude and pitch motion amplitude of the semi-submersible floating platform are both reduced by 40%. It is shown that the wind-wave coupling power generation system proposed by the present invention can effectively increase the power generation capacity of the wave energy device, and reduce the motion amplitude of the wave energy power generation device to improve the structural strength and survivability of the device; in improving the stability of the semi-submersible floating platform In terms of performance, the wind-wave coupling power generation system proposed by the present invention has significant effects, and further improves the survivability of the wave energy power generation device and the floating wind turbine at sea.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the scope of protection of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, those skilled in the art do not need to pay creative work. Various modifications or deformations that can be made are still within the protection scope of the present invention.

Claims (10)

1. a multi-degree-of-freedom wave energy float and a semi-submersible floating fan coupling power generation system, is characterized in that, comprises a semi-submersible floating platform, and the upper center of the semi-submersible floating platform is installed with a wind power generation mechanism, and the wind power generation mechanism A multi-degree-of-freedom wave energy float is installed on the peripheral semi-submersible floating platform; the wind power generation mechanism and the multi-degree-of-freedom wave energy float are controlled by the central control system; The multi-degree-of-freedom wave energy float includes a vertical guide column installed on the semi-submersible floating platform, a guide rail is vertically installed on the inner side of the vertical guide column, and a slider that can slide freely along the guide rail is clamped. The block is rotatably connected with the rotating shaft on the wave energy float, and the wave energy float moves with two degrees of freedom relative to the semi-submersible floating platform; the top of the wave energy float is hinged with the bottom of a plurality of piston rods, and the piston rods One end is connected with the piston through the ball bearing, the piston is axially matched with the hydraulic cylinder, and the heave and pitch motions of the wave energy float under the action of waves are converted into the axial sliding of the piston inside the hydraulic cylinder; The liquid inlet and outlet are respectively connected with the low-pressure accumulator and the high-pressure accumulator. The high-pressure accumulator is connected with the liquid inlet of the hydraulic motor through the pipeline. The hydraulic motor is connected with the generator and can drive it to do work and generate electricity. The liquid outlet of the motor communicates with the liquid inlet of the low pressure accumulator. 2. The multi-degree-of-freedom wave energy float and semi-submersible floating fan coupling power generation system according to claim 1, wherein the semi-submersible floating platform comprises three There are three floating legs, the three floating legs are connected by transverse braces, and the three floating legs are connected with the central column located in the center of the triangle by diagonal bracing. 3. The multi-degree-of-freedom wave energy float and semi-submersible floating fan coupling power generation system according to claim 2, wherein the wind power generation mechanism is installed on the upper part of the central column. 4. The multi-degree-of-freedom wave energy float and semi-submersible floating wind turbine coupling power generation system according to claim 2, wherein each floating leg is connected with a mooring cable for anchoring in the deep sea. 5. The multi-degree-of-freedom wave energy float and semi-submersible floating fan coupling power generation system as claimed in claim 2, characterized in that, between every two floating legs are connected by upper and lower parallel horizontal braces, and the two horizontal braces They are connected by two parallel vertical guide columns; the upper transverse support is provided with a support part fixed on it, and a low pressure accumulator, a high pressure accumulator, a hydraulic motor and a generator are installed on the support part. 6. The multi-degree-of-freedom wave energy float and the semi-submersible floating fan coupled power generation system according to claim 2, wherein the multi-degree-of-freedom wave energy float consists of three groups, which are respectively installed on two adjacent floating piles between the legs. 7. The multi-degree-of-freedom wave energy float and semi-submersible floating fan coupling power generation system according to claim 5, wherein the wave energy float, the piston rod and the hydraulic cylinder are located in two horizontal braces and two vertical guide columns. in the space between. 8 . The multi-degree-of-freedom wave energy float and semi-submersible floating fan coupling power generation system according to claim 3 , wherein the central control system is arranged at the bottom of the tower of the wind power generating mechanism. 9 . 9. The multi-degree-of-freedom wave energy float and the semi-submersible floating fan coupling power generation system as claimed in claim 1, wherein the power generated by the wind power generation mechanism and the multi-degree-of-freedom wave energy float is fed into the central control system, and the central The control system outputs power through the main cable. 10. The power generation method of a multi-degree-of-freedom wave energy float and a semi-submersible floating fan coupled power generation system, characterized in that it includes: After the coupling power generation system is installed and activated, the offshore wind power generation mechanism generates power under the drive of the wind, and the electric energy is connected to the central control system. The parameters are compared with the rated parameters of the system, and the adjustment scheme is automatically calculated, and the adjustment scheme is further converted into the hydraulic release pressure control parameters of the high-voltage accumulator, so as to change the output power, voltage and current parameters of the wave energy power generation device; The heave and pitch motion of the wave energy float under the action of waves is converted into the axial slip of the piston inside the hydraulic cylinder; when the piston moves downward, the hydraulic oil in the low pressure accumulator is pumped into the hydraulic cylinder, when When the piston moves upward, the hydraulic oil in the hydraulic cylinder is squeezed into the high-pressure accumulator, and the wave energy is converted into hydraulic energy through the multi-degree-of-freedom motion of the wave energy float and stored in the high-pressure accumulator; When the pressure value in the high-pressure accumulator reaches the release pressure value set by the central control system, the high-pressure oil will be released and flow to the hydraulic motor along the pipeline. , the hydraulic oil that has completed the work will flow back to the low-pressure accumulator along the pipeline, thus completing a wave energy power generation cycle; The electric energy generated by the wave power generation device is also fed into the central control system, complemented and integrated with the electric energy obtained by the wind turbine, and then fed into the power grid through the main cable.

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