Wave energy power generation device and control method

Abstract

The present invention provides a wave energy power generation device and control method, the wave energy power generation device includes a floating platform, a rotating seat and a processor, the floating platform is provided with a flow velocity and direction meter connected to the processor, the floating platform includes a first column; the first column is provided with a generator and a yaw drive module, a yaw brake module and a yaw counter, all of which are connected to the processor, and the first column is rotatably connected to the rotating seat; at least one group of absorbing components are symmetrically provided on the front side of the rotating seat, and the absorbing components are all hinged to the rotating seat; a hydraulic energy storage system connected to the absorbing components is provided in the rotating seat; the hydraulic motor of the hydraulic energy storage system is connected to the generator. The absorbing component of the device of the present invention can adaptively adjust its angle with the incoming wave direction, so that it can not only always be in the wave-facing direction under normal sea conditions, but also can be adjusted to be parallel to the wave direction under extreme sea conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation devices, and in particular to a wave energy power generation device and a control method thereof. Background Art

[0002] 71% of the Earth's surface is covered by oceans, which contain vast reserves of various energy sources, including offshore wind energy, wave energy, tidal energy, temperature gradient energy, and salinity gradient energy. Offshore wind and wave energy offer numerous advantages, including pollution-free operation, large reserves, widespread distribution, high energy density, and concentrated energy forms. Consequently, these two energy sources have become sought-after new energy sources by energy experts worldwide in recent years.

[0003] A wave energy power generation device is a system that converts the kinetic energy of waves into electrical energy. It is generally composed of a capture system, an energy conversion system, a monitoring system, and a mooring system. Wave energy generation is usually achieved by attaching the device to an offshore floating platform or platform. The direction of wave propagation is random and uncertain under complex sea conditions. The angle between the wave energy power generation device and the incoming wave direction is a key factor affecting energy capture efficiency. However, existing wave energy power generation devices based on floating platforms are fixed to the floating platform and cannot flexibly adjust the angle between the wave energy generation device and the incoming wave direction. This reduces the wave energy capture efficiency of the wave energy power generation device and affects the power generation efficiency and economic efficiency of the wave energy power generation device. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and propose a wave energy power generation device and control method, which can adaptively adjust the angle between the wave energy power generation device and the incoming wave direction, so as to solve the problem that the existing wave energy power generation devices based on offshore floating platforms are fixedly connected to the floating platform and cannot flexibly adjust the angle between the wave energy generation device and the incoming wave direction, thereby affecting their wave energy capture efficiency.

[0005] The present invention provides a wave energy power generation device, comprising a floating platform, a rotating seat and a processor, wherein a flow velocity and direction meter is provided on the floating platform, and the floating platform comprises a first column;

[0006] The first column is provided with a generator, a yaw drive module, a yaw brake module and a yaw counter. The first column vertically passes through the central axis of the rotating base and is rotatably connected to the rotating base. The yaw drive module is used to drive the rotating base to rotate around the first column. The yaw brake module is used to fix the rotating base. The yaw counter is used to record the rotation angle of the rotating base.

[0007] The yaw drive module, the yaw brake module, the yaw counter and the flow velocity and direction meter are respectively connected to the processor for communication;

[0008] The rotating seat is a box structure with a cavity inside. The rotating seat is symmetrically provided with at least one group of wave absorbing components for absorbing wave energy on its front side with its central axis as the axis of symmetry, and the wave absorbing components are all hinged to the rotating seat; a hydraulic energy storage system is provided in the cavity, and the hydraulic energy storage system is connected to the hydraulic cylinder of the wave absorbing component for converting wave energy into hydraulic energy; the hydraulic motor of the hydraulic energy storage system is connected to the generator for converting hydraulic energy into electrical energy.

[0009] Preferably, the floating platform comprises a plurality of concentric support arms extending radially, the distal ends of the support arms are each provided with the first columns, and the distances between the first columns and the center of the circle are equal;

[0010] The yaw drive module, yaw brake module and yaw counter on each of the first columns are respectively connected to the processor for communication.

[0011] Preferably, the floating platform is a semi-submersible platform.

[0012] More preferably, it further comprises a wind turbine generator set, which is vertically fixed on the floating platform.

[0013] More preferably, the wave energy power generation devices are evenly arranged along the circumference with the tower of the wind turbine generator set as the central axis.

[0014] More preferably, the wind turbine generator set is of a wind direction adaptive type.

[0015] Preferably, the wave absorbing component is a dolphin-type or eagle-type wave energy device.

[0016] Another object of the present invention is to provide a control method for a wave energy power generation device, based on the above-mentioned wave energy power generation device, comprising the steps of:

[0017] S10, each yaw counter in the wave energy power generation device timely records the rotation angle of the corresponding rotating seat, and the current velocity and direction meter timely obtains the wave direction and wave height, and sends them to the processor in a timely manner;

[0018] S11: The processor calculates the angle θ between each absorbing component and the wave direction according to the received wave direction and the rotation angle of the rotating seat. n , and judge whether the wave height exceeds the upper threshold H max If yes, go to step S12; if no, go to step S13;

[0019] S12: The processor determines |θ n |Whether the emergency avoidance condition allows the threshold value θ2, if so, the emergency avoidance control mode of step S14 is executed, if not, no rotation command is issued;

[0020] S13: The processor determines |θ n |Whether it exceeds the normal power generation condition allowable threshold θ1, if so, execute the high-efficiency capture control mode of step S15, if not, do not issue a rotation command;

[0021] S14: If θ n >θ2, the processor sends a first action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate counterclockwise to a preset adjustment angle a; if θ n <-θ2, the processor sends a second action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate clockwise by a preset adjustment angle a; after the processor receives the rotation angle equal to the preset adjustment angle a sent by the corresponding yaw counter, step S11 is executed;

[0022] S15: If θ n >θ1, the processor sends a third action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate counterclockwise to a preset adjustment angle b; if θ n <-θ1, the processor sends a fourth action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate clockwise by a preset adjustment angle b; after the processor receives the rotation angle equal to the preset adjustment angle b sent by the corresponding yaw counter, step S11 is executed.

[0023] Preferably, before entering step S11, the process further includes executing step S16: the processor determines whether the wave height exceeds the lower threshold value H min If so, execute step S11; if not, do not issue a rotation instruction.

[0024] Further preferably, the preset adjustment angle a is equal to the preset adjustment angle b.

[0025] It can be seen from the above technical solutions that the present invention has the following advantages:

[0026] On the one hand, the above technical solution of the present invention provides a wave energy power generation device, wherein the yaw drive module, the yaw brake module, the yaw counter and the flow velocity and direction meter are respectively communicatively connected to the processor, and the first column is rotatably connected to the rotating seat, so that the processor can control the yaw drive module to drive the rotating seat to rotate around the first column according to the wave direction and wave height sent by the flow velocity and direction meter and the rotation angle of the rotating seat sent by the yaw counter, thereby enabling the absorbing component to adaptively adjust its angle with the incoming wave direction, so that it can not only always be in the wave-facing direction under normal sea conditions, thereby improving the wave energy capture efficiency of the wave energy power generation device, but also can be adjusted to be parallel to the wave direction under extreme sea conditions, reducing the load of waves on the wave energy power generation device, thereby improving the safety and stability of the wave energy power generation device, and fixing the rotating seat by the yaw brake module can ensure that the absorbing component will not be passively rotated due to the action of waves, thereby improving the stability of the angle between it and the incoming wave direction.

[0027] On the other hand, the above technical solution of the present invention provides a control method for a wave energy power generation device, which timely processes the data information of the yaw counter and the flow velocity and direction meter 3 through the processor, and controls the yaw drive module to drive the rotating seat 2 to rotate around the first column 4, so that the absorbing component 10 can adaptively adjust its angle with the incoming wave direction; and by setting the wave height upper threshold H max The emergency avoidance condition threshold θ2 of the angle is used to determine whether to enter the emergency avoidance control mode, and the upper threshold H max The judgment of the allowable threshold value θ1 under the normal power generation condition is used to identify whether to enter the high-efficiency capture control mode, so that the above-mentioned wave energy power generation device can not only always be in the wave-facing direction under normal sea conditions, but also be able to adjust the angle with the wave direction to be parallel under extreme sea conditions; and by setting the allowable threshold value θ2 under the emergency avoidance condition and the allowable threshold value θ1 under the normal power generation condition, the angle between the absorbing component 10 and the incoming wave direction is retained with a certain allowable margin, avoiding the driving of the rotating seat 2 to rotate whenever the angle between the two is not 90° or 0°, thereby avoiding the problem of excessive wear of the device due to frequent rotation and accelerated shortening of the life of the equipment due to long-term operation, and is more in line with actual operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1A schematic diagram of the overall structure of a wave energy power generation device provided in Example 1 of the present invention;

[0030] Figure 2 for Figure 1 Side view of;

[0031] Figure 3 A schematic structural diagram of a wave absorbing assembly of a wave energy power generation device provided in the first embodiment of the present invention;

[0032] Figure 4 for Figure 3 Side view of;

[0033] Figure 5 This is a schematic diagram of the structure of the cooperation between the yaw drive module and the yaw brake module provided in the first embodiment of the present invention;

[0034] Figure 6 for Figure 5 A top view of

[0035] Figure 7 A schematic diagram of a high-efficiency capture mode state of a wave energy power generation device provided in the first embodiment of the present invention;

[0036] Figure 8 A schematic diagram of an emergency avoidance mode of a wave energy power generation device provided in the first embodiment of the present invention;

[0037] Figure 9 A schematic diagram of the angle between the wave absorbing component and the wave direction of a wave energy power generation device provided in the first embodiment of the present invention;

[0038] Figure 10 This is a flow chart of a control method for a wave energy power generation device provided in the second embodiment of the present invention;

[0039] Among them, the figure numerals are explained: floating platform 1, rotating seat 2, flow velocity and direction meter 3, first column 4, generator 5, yaw drive motor 6, gear ring 7, brake pad 8, screw 9, absorbing assembly 10, absorbing float 101, connecting rod 102, spring rod 103, hydraulic cylinder 104, hydraulic rod 105, upper hinge plate 106, lower hinge plate 107, support arm 11, wind turbine 12, tower 120, nacelle 121, blade 122, second column 13. DETAILED DESCRIPTION

[0040] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the description of this application, it should be noted that the terms "upper", "lower", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0042] Unless otherwise expressly specified or limited, the terms "connect," "fixed," and "disposed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, indirect connections through an intermediary, or connections within two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of such features, unless otherwise specifically specified.

[0044] The first embodiment of the present invention provides a wave energy power generation device, such as Figures 1-2 As shown, it includes: a floating platform 1, a rotating seat 2 and a processor (not shown in the figure), a flow velocity and direction meter 3 is provided on the floating platform 1, and the floating platform 1 includes a first vertically arranged column 4;

[0045] The first column 4 is provided with a generator 5 (not shown in the figure), a yaw drive module, a yaw brake module and a yaw counter (not shown in the figure). The first column 4 vertically passes through the central axis of the rotating base 2 and is rotatably connected to the rotating base 2. The above-mentioned yaw drive module is used to drive the rotating base 2 to rotate around the first column 4, the above-mentioned yaw brake module is used to fix the rotating base 2, and the above-mentioned yaw counter is used to record the rotation angle of the rotating base 2. In a specific embodiment, Figure 5 and 6As shown, the yaw drive module includes a yaw drive motor 6 fixed in the first column 4, and the rotating base 2 is provided with a gear ring 7 coaxial with its central axis at the point where the first column 4 passes through. The other end of the output shaft of the yaw drive motor 6 is engaged with the gear ring 7. The yaw brake module includes two brake pads 8 respectively located on the upper and lower end surfaces of the gear ring 7. The two brake pads 8 are connected by a screw 9. By controlling the screw 9 to rotate clockwise, the distance between the two brake pads 8 is reduced until the gear ring 7 is clamped, so that the friction force generated can ensure that the rotating base 2 does not rotate, and by controlling the screw 9 to rotate counterclockwise, the distance between the upper and lower brake pads 8 is increased until There is no contact with the end surface of the gear ring 7, so that the friction between the brake pads 8 and the gear ring 7 disappears, so that the rotating base 2 can rotate smoothly under the drive of the yaw drive motor 6; of course, in order to improve the driving force during rotation, multiple yaw drive motors 6 can be arranged around the circumference of the gear ring 7. In order to increase the friction during braking, the combination of the upper and lower brake pads 8 can also be arranged in multiple groups along the circumference of the gear ring 7. It should be noted that the mechanical transmission connection between the above-mentioned yaw drive module and the yaw brake module and the various mechanical transmission components should be sealed underwater to avoid corrosion from seawater. This is a technical means that can be easily implemented by those skilled in the art and will not be described in detail here.

[0046] The above-mentioned yaw drive module, yaw brake module, yaw counter and flow velocity and direction meter 3 are respectively connected to the processor for communication;

[0047] The rotating base 2 is a box structure with a cavity inside. The rotating base 2 has at least one set of wave absorbing assemblies 10 symmetrically arranged on its front side with its central axis as the axis of symmetry. The wave absorbing assemblies 10 are all hinged to the rotating base 2. A hydraulic energy storage system (not shown in the figure) is arranged in the above cavity. The hydraulic energy storage system is connected to the hydraulic cylinder 104 of the wave absorbing assembly 10 for converting wave energy into hydraulic energy. The hydraulic motor of the hydraulic energy storage system is connected to the generator 5 for converting hydraulic energy into electrical energy.

[0048] In this embodiment, the wave absorbing component 10 is an oscillating float type, and can be various types of wave energy devices including existing dolphin-type or eagle-type wave energy devices. In the specific embodiment taking the dolphin-type wave energy device as an example, Figures 3-4As shown, the wave absorbing assembly 10 includes a wave absorbing float 101, a connecting rod 102, a spring rod 103, a hydraulic cylinder 104 and a hydraulic rod 105. One end of the connecting rod 102 is hinged to the wave absorbing float 101, and the other end is hinged to the front side of the rotating seat 2 through the lower hinge plate 107. The spring rod 103 is located below the connecting rod 102, and one end is hinged to the wave absorbing float 101, and the other end is hinged to the connecting rod 102. The hydraulic rod 105 and the hydraulic cylinder 104 are located on the connecting rod 1 02, one end of the hydraulic rod 105 is inserted into the hydraulic cylinder 104, and the other end is hinged to the connecting rod 102. The other end of the hydraulic cylinder 104 is hinged to the front side of the rotating seat 2 through the upper hinge plate 106. After the wave-absorbing float 101 is acted upon by the waves, it drives the connecting rod 102 and the spring rod 103 to rotate around the lower hinge plate 107, so that the hydraulic rod 105 moves in the hydraulic cylinder 104 to drive the hydraulic energy storage system to do work, thereby converting wave energy into hydraulic energy.

[0049] The present invention provides a wave energy power generation device in which a yaw drive module, a yaw brake module, a yaw counter and a current velocity and direction meter 3 are respectively connected to the processor for communication, and a first column 4 is rotatably connected to the rotating seat 2, so that the processor can control the yaw drive module to drive the rotating seat 2 to rotate around the first column 4 according to the wave direction and wave height sent by the current velocity and direction meter 3 and the rotation angle of the rotating seat 2 sent by the yaw counter, thereby enabling the wave absorbing component 10 to adaptively adjust its angle with the incoming wave direction, so that it can not only always be in normal sea conditions but also in normal sea conditions. Figure 7 The wave-facing direction shown in the figure can improve the wave energy capture efficiency of the wave energy power generation device, and it can also be adjusted to the following in extreme sea conditions: Figure 8 As shown, it is parallel to the wave direction, reducing the load of waves on the wave energy power generation device, thereby improving the safety and stability of the wave energy power generation device, and fixing the rotating seat 2 by the yaw brake module can ensure that the absorbing assembly 10 will not be passively rotated due to the action of waves, thereby improving the stability of the angle between it and the incoming wave direction.

[0050] In order to arrange multiple absorbing assemblies 10 on the same floating platform 1 to improve the wave utilization efficiency of the wave energy power generation device, in a specific embodiment, the floating platform 1 includes multiple concentric support arms 11 extending radially, and a first column 4 is provided at the distal end of each support arm 11. The yaw drive module, yaw brake module and yaw counter on each first column 4 are respectively communicated with the above-mentioned processor, so that the processor can separately receive signal data from the corresponding yaw counter on each support arm 11 and separately control the operation of the corresponding yaw drive module and yaw brake module on each support arm 11; at the same time, the distance between each first column 4 and the center of the circle is equal to ensure the balance of the weight distribution of the floating platform 1.

[0051] In this embodiment, Figure 1As shown, the floating platform 1 has a Y-shaped structure with three support arms 11, and there are four groups of absorbing components 10 corresponding to each support arm 11. It should be noted that the distal end of the support arm 11 is the end away from the center of the circle formed by each support arm 11. The absorbing components 10 corresponding to each support arm 11 can be one group, two groups, three groups, etc., and the specific number is determined comprehensively based on the designed power generation and the size of the rotating base 2.

[0052] The floating platform 1 is mainly divided into semi-submersible, single-column, tension-leg and barge types. Among them, the semi-submersible platform has the advantages of a wide operating water depth range, a small waterline area, strong wind and wave resistance, a large deck area and a large variable load, and is widely used in ocean energy power generation platforms such as wave energy, offshore wind power, and offshore photovoltaics. Therefore, in this embodiment, the floating platform 1 is preferably a semi-submersible platform.

[0053] Due to the volatility and randomness of offshore wind and wave energy, offshore wind and wave energy cannot be used as a stable power source for long-term power generation. However, the two energy sources have certain complementarity. If offshore wind and wave energy can be efficiently combined, it will not only be beneficial to the development of the marine economy, reduce emissions and improve the environment, but also have great strategic significance for the management and construction of islands far away from the mainland.

[0054] To this end, in a specific implementation, the wave energy power generation device also includes a wind turbine 12, which is vertically fixed on the floating platform 1. In this way, the wind turbine 12 and the wave energy power generation device are coupled and installed to form a wind-wave combined power generation device. This not only improves the utilization rate of the floating platform 1, but also significantly reduces the manufacturing cost of the device by sharing the submarine cable, the floating platform 1, and the mooring system. At the same time, it can improve the comprehensive utilization and conversion efficiency of wind energy and wave energy green energy, thereby increasing the comprehensive power generation of the device and significantly improving the economic benefits and profitability of the ocean energy power generation device. Usually, the wind turbine 12 is composed of a tower 120, a nacelle 121, blades 122, etc. The blades 122 absorb the kinetic energy of the wind and convert it into electrical energy. In order to facilitate the docking and installation of the tower 120 and the floating platform 1, specifically, a second column 13 can be provided, and the lower end of the second column 13 is fixedly connected to the floating platform 1, and the upper end is docked and fixed to the tower 120. The wave energy power generation device in the preferred embodiment is evenly arranged along the circumference with the tower 120 of the wind turbine 12 as the central axis, so that the weight of the wind and wave combined power generation device can be evenly distributed, thereby improving the stability of the device.

[0055] Furthermore, the wind turbine 12 is of an adaptive wind direction type, that is, the wind turbine 12 can adjust the windward position of the wind rotor in real time through its yaw control system, thereby adjusting the angle between the wind rotor and the incoming wind direction to achieve the maximum wind energy capture efficiency of the wind turbine 12. This function is an existing technology and will not be repeated here. Specifically, the wind turbine 12 can be a horizontal axis wind turbine or a vertical axis wind turbine.

[0056] Based on the wave energy power generation device provided in the above embodiment 1, the second embodiment of the present invention provides a control method for the wave energy power generation device, such as Figure 10 As shown, the steps include:

[0057] S10, each yaw counter in the wave energy power generation device timely records the rotation angle of the corresponding rotating seat 2, and the current velocity and direction meter 3 timely obtains the wave direction and wave height, and sends them to the processor in a timely manner;

[0058] S11: The processor calculates the angle θ between each absorbing assembly 10 and the wave direction according to the received wave direction and the rotation angle of each rotating seat 2. n ,like Figure 9 As shown, it is determined whether the wave height exceeds the upper threshold H max If yes, go to step S12; if no, go to step S13;

[0059] S12: The above processor determines |θ n |Whether the emergency avoidance condition allows the threshold value θ2, if so, the emergency avoidance control mode of step S14 is executed, if not, no rotation command is issued;

[0060] S13: The processor determines |θ n |Whether it exceeds the normal power generation condition allowable threshold θ1, if so, execute the high-efficiency capture control mode of step S15, if not, do not issue a rotation command;

[0061] It is easy for a person skilled in the art to understand that when the rotating seat 2 is kept perpendicular to the wave direction, the absorbing assembly 10 is in a frontal position facing the wave, that is, the angle θ between the absorbing assembly 10 and the wave direction is n When it is zero, the wave energy power generation device can achieve and maintain the highest wave energy capture efficiency. However, it should be considered that due to the random variability of waves, if the rotating seat 2 is driven to rotate whenever there is an angle between the two, frequent rotation will cause the device to wear out too quickly and the equipment to run for a long time, which will accelerate the shortening of its life. In this embodiment, by setting the allowable threshold value θ1 under normal power generation conditions, a certain margin is retained for the angle between the absorbing component 10 and the incoming wave direction, thereby avoiding the problem of driving the rotating seat 2 to rotate whenever there is an angle between the two, thereby avoiding the problem of frequent rotation causing the device to wear out too quickly and the equipment to run for a long time, which is more in line with actual operating conditions.

[0062] S14: If θ n >θ2, the processor sends a first action instruction to the corresponding yaw drive module to drive the corresponding rotating seat 2 to rotate counterclockwise to a preset adjustment angle a; if θ n<-θ2, the processor sends a second action instruction to the corresponding yaw drive module to drive the corresponding rotating seat 2 to rotate clockwise by a preset adjustment angle a; after the processor receives the rotation angle equal to the preset adjustment angle a sent by the corresponding yaw counter, step S11 is executed;

[0063] S15: If θ n >θ1, the processor sends a third action instruction to the corresponding yaw drive module to drive the corresponding rotating seat 2 to rotate counterclockwise to a preset adjustment angle b; if θ n <-θ1, the above-mentioned processor sends a fourth action instruction to the corresponding yaw drive module to drive the corresponding rotating seat 2 to rotate clockwise by a preset adjustment angle b; after the processor receives the rotation angle sent by the corresponding yaw counter equal to the preset adjustment angle b, step S11 is executed.

[0064] The second embodiment provides a control method for a wave energy power generation device, which timely processes the data information of the yaw counter and the flow velocity and direction meter 3 through the processor, and controls the yaw drive module to drive the rotating seat 2 to rotate around the first column 4, so that the wave absorbing component 10 can adaptively adjust its angle with the incoming wave direction; and by setting the wave height upper threshold H max The emergency avoidance condition threshold θ2 of the angle is used to determine whether to enter the emergency avoidance control mode, and the upper threshold H max and the normal power generation condition allowable threshold θ1 to identify whether to enter the high-efficiency capture control mode, so that the above-mentioned wave energy power generation device can not only always be in the wave-facing direction under normal sea conditions, thereby improving the wave energy capture efficiency of the wave energy power generation device, but also can adjust the angle with the wave direction to be parallel under extreme sea conditions, thereby reducing the load of waves on the wave energy power generation device and improving the safety and stability of the wave energy power generation device; and by setting the emergency avoidance condition allowable threshold θ2 and the normal power generation condition allowable threshold θ1, the angle between the absorbing component 10 and the incoming wave direction retains a certain allowable margin, avoiding the driving of the rotating seat 2 to rotate whenever the angle between the two is not 90° or 0°, thereby avoiding the problem of excessive wear of the device due to frequent rotation and accelerated shortening of the life of the equipment due to long-term operation, and is more in line with actual operating conditions.

[0065] When the wave height is too small, even if the position of the wave absorbing assembly 10 of the wave energy power generation device faces the direction of the wave, the power generation of the wave energy power generation device is still small. At this time, taking into account the mechanical wear caused by driving the rotating seat 2, in order to improve the economic efficiency of the device operation, in a preferred embodiment, before entering step S11, step S16 is further executed: the above-mentioned processor determines whether the wave height exceeds the lower threshold H min If yes, then execute step S11; if no, then do not issue a rotation instruction, thereby setting the lower threshold value H of the wave height. min, when the wave height is less than the lower threshold H min In this case, the processor does not issue a rotation instruction, thereby avoiding mechanical wear in the case of too low power generation and improving the economic efficiency of the device operation.

[0066] It should be noted that the preset adjustment angle a and the preset adjustment angle b can be any angle. Considering the characteristics of the wave direction changing at any time and the safety of rotation, the two values should not be set too large to avoid a single rotation angle being too large, which may lead to safety hazards in the operation of the device and poor adaptability to the change of wave direction at any time, resulting in excessive adjustment. Specifically, they can be 0.1°, 0.2°, ... 0.5°, etc. Preferably, the preset adjustment angle a is equal to the preset adjustment angle b, so as to simplify the program setting of the processor.

[0067] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wave energy power generation device, characterized in that: The floating platform comprises a floating platform, a rotating seat and a processor, wherein a flow velocity and direction meter is provided on the floating platform, and the floating platform comprises a first column; The first column is provided with a generator, a yaw drive module, a yaw brake module and a yaw counter. The first column vertically passes through the central axis of the rotating base and is rotatably connected to the rotating base. The yaw drive module is used to drive the rotating base to rotate around the first column. The yaw brake module is used to fix the rotating base. The yaw counter is used to record the rotation angle of the rotating base. The yaw drive module, the yaw brake module, the yaw counter and the flow velocity and direction meter are respectively connected to the processor for communication; The rotating seat is a box structure with a cavity therein. The rotating seat has at least one set of wave absorbing components symmetrically arranged on its front side with its central axis as the axis of symmetry, and the wave absorbing components are hinged to the rotating seat. A hydraulic energy storage system is arranged in the cavity, and the hydraulic energy storage system is connected to the hydraulic cylinder of the wave absorbing component for converting wave energy into hydraulic energy. The hydraulic motor of the hydraulic energy storage system is connected to the generator for converting hydraulic energy into electrical energy. The control method of the wave energy power generation device comprises: S10, the yaw counter in the wave energy power generation device timely records the rotation angle of the corresponding rotating seat, and the current velocity and direction meter timely obtains the wave direction and wave height, and sends them to the processor in a timely manner; S11: The processor calculates the angle θ between each absorbing component and the wave direction according to the received wave direction and the rotation angle of the rotating seat. n , and judge whether the wave height exceeds the upper threshold H max If yes, proceed to step S12; If not, proceed to step S13; S12: The processor determines |θ n |Whether the emergency avoidance condition allows the threshold value θ2, if so, the emergency avoidance control mode of step S14 is executed, if not, no rotation command is issued; S13: The processor determines |θ n |Whether it exceeds the normal power generation condition allowable threshold θ1, if so, execute the high-efficiency capture control mode of step S15, if not, do not issue a rotation command; S14: If θ n >θ2, the processor sends a first action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate counterclockwise to a preset adjustment angle a; if θ n <-θ2, the processor sends a second action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate clockwise by a preset adjustment angle a; after the processor receives a signal from the corresponding yaw counter indicating that the rotation angle is equal to the preset adjustment angle a, step S11 is executed; S15: If θ n >θ1, the processor sends a third action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate counterclockwise to a preset adjustment angle b; if θ n <-θ1, the processor sends a fourth action instruction to the corresponding yaw drive module to drive the corresponding rotating seat to rotate clockwise by a preset adjustment angle b; after the processor receives the rotation angle equal to the preset adjustment angle b sent by the corresponding yaw counter, step S11 is executed.

2. A wave energy power generation device according to claim 1, characterized in that: The floating platform comprises a plurality of concentric support arms extending radially, the distal ends of the support arms are each provided with the first columns, and the distances between the first columns and the center of the circle are equal; The yaw drive module, yaw brake module and yaw counter on each of the first columns are respectively connected to the processor for communication.

3. The wave energy power generation device according to claim 1, characterized in that: The floating platform is a semi-submersible platform.

4. A wave energy power generation device according to any one of claims 1 to 3, characterized in that: It also includes a wind turbine generator set, which is vertically fixed on the floating platform.

5. The wave energy power generation device according to claim 4, characterized in that: The wind turbine generator set is of the self-adaptive wind direction type.

6. The wave energy power generation device according to claim 1, characterized in that: The wave absorbing component is a dolphin-type or eagle-type wave energy device.

7. The wave energy power generation device according to claim 1, characterized in that: Before entering step S11, the process also includes executing step S16: the processor determines whether the wave height exceeds the lower threshold H min If so, execute step S11; if not, do not issue a rotation instruction.

8. The wave energy power generation device according to claim 1, characterized in that: The preset adjustment angle a is equal to the preset adjustment angle b.

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