Hydroenergy power generation device

Abstract

According to the hydroenergy power generation device, power is jointly supplied through a first power generation module, a second power generation module and an energy storage module, the first power generation module generates power according to wave energy, the second power generation module drives a turbine to generate power according to input water flow, and a first pipeline is arranged below an oscillation floater and can generate a damping effect on the oscillation floater; the motion stability of the oscillation floater is improved under extreme conditions, and the power generation stability of the first power generation module is further improved. According to the hydroenergy power generation device, the influence of instability of wave energy on the stability of wave energy power generation can be effectively reduced, the power supply stability is improved, when the power generation power of the first power generation module is larger than the power utilization power of the load, the first pipeline can be opened, and the first water flow is obtained in the first pipeline according to the motion of the oscillation floater along with waves; the first water flow drives the second power generation module to charge the energy storage module, the utilization rate of the wave energy can be further improved, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower generation, and in particular to a hydropower generation device. Background Art

[0002] For offshore platforms or docks, transmitting electricity from land is risky and costly, leading many projects to rely on wave power generation. Wave power generation utilizes the kinetic energy of ocean waves and primarily includes oscillating water column, push-and-slide, wave-gathering storage, and oscillating float types.

[0003] Among them, the oscillating water column power generation device converts wave motion into air flow through an air chamber to drive the turbine to generate electricity. It has a simple structure and is usually deployed near the shore or in shallow waters. The wave energy is converted into air flow, which drives the turbine to generate electricity. After multiple conversions, the efficiency is reduced; the oscillating float power generation device uses the vertical oscillation of the float to drive the motor to generate electricity. It has fewer energy conversion times and high efficiency.

[0004] However, traditional oscillating float-type power generation devices are usually in a complex and changeable marine hydrological environment, including changes in hydraulic factors such as tide level, wave height, wave direction, and frequency under normal and extreme conditions in the working sea area. As a result, the efficiency of converting water energy into mechanical energy and then into electrical energy is affected, and the output of the generator set is unstable, which greatly limits the absorption and application development of new energy. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a hydropower generation device to solve the problem that the power generation device on the offshore platform far away from the land is significantly affected by wind and waves and has insufficient power generation stability.

[0006] The present invention provides a hydropower generation device, comprising: a first power generation module and a second power generation module arranged on an underwater platform, and an energy storage module and a main controller arranged on an above-water platform, wherein: The first power generation module is used to obtain mechanical energy from waves according to the oscillating float to generate electricity according to the mechanical energy, and the second power generation module is used to drive a turbine according to the input water flow to generate electricity; The first power generation module further includes a first pipeline, which includes a first flow guide cover. The bottom of the first flow guide cover is connected to the second power generation module via a first transmission pipe. The first flow guide cover is longitudinally arranged below the oscillating float so that when the oscillating float oscillates, a first water flow can be stimulated in the first pipeline and provided to the second power generation module. The main controller is used to monitor the first power generation power of the first power generation module and the power consumption of the load, as well as the status of the energy storage module, and when the first power generation power is greater than the power consumption and the energy storage module meets the charging conditions, open the first pipeline and drive the second power generation module to charge the energy storage module through the first water flow.

[0007] Optionally, the top of the first air deflector is covered with a filter grid, the first generator of the first power generation module is arranged in the first air deflector, and the first generator is connected to the oscillating float through a connecting rod.

[0008] Optionally, the diameter of the first transmission pipe gradually decreases along the transmission direction.

[0009] Optionally, guide fins are further provided on the inner side wall of the first air guide cover.

[0010] Optionally, the second power generation module further includes a second pipeline, the second pipeline being used to provide a second water flow according to the subsurface water flow, and the second power generation module is further used to generate electricity according to the parallel flow of the second water flow and the first water flow; The main controller is further configured to monitor the size of surface waves and the velocity of water flow below the surface, so as to obtain a first predicted power generation power of the first power generation module and a second predicted power generation power of the second power generation module according to the size of surface waves and the velocity of water flow below the surface, and to use the second power generation module as a direct power supply when the first predicted power generation power is less than the second predicted power generation power; The main controller is further used to adjust the openings of the first pipeline and the second pipeline to adjust the power generation power of the second power generation module.

[0011] Optionally, the above-water platform is arranged on the top of the fixed pile, and the underwater platform is fixedly arranged at the waist of the fixed pile by a clamp locking mechanism. The clamp locking mechanism includes a socket, and the underwater platform includes an extending fixed rod, and the fixed rod is plugged and fixed in the socket.

[0012] Optionally, the clamp locking mechanism is further connected to a guide rail, which is arranged below the underwater platform.

[0013] Optionally, the guide rail is a multi-section structure, and the guide rails are connected by hinges and self-locking mechanisms. The hinges are used to enable each section of the guide rail to swing with the water flow within a predetermined range, and the self-locking mechanism is used to reduce the floating amount between the guide rails when the wind and waves are greater than a preset self-locking threshold, so as to avoid the offset of the wave movement exceeding the safety limit and destroying the connection state between the guide rails.

[0014] The hydropower generation device provided by the present invention includes a first power generation module and a second power generation module disposed on an underwater platform, as well as an energy storage module and a main controller disposed on an above-water platform. The first power generation module is configured to generate electricity by generating mechanical energy from waves generated by an oscillating float, while the second power generation module generates electricity by driving a turbine based on input water flow. The first power generation module further includes a first pipeline comprising a first shroud disposed below the oscillating float, the bottom of which is connected to the second power generation module via a first transmission pipe. When the oscillating float oscillates, the first shroud can damp the movement of the oscillating float under extreme conditions, thereby improving the motion stability of the oscillating float and, in turn, the power generation stability of the first power generation module. When the first power generation power of the first power generation module exceeds the power consumption of the load and the energy storage module meets charging conditions, the first pipeline is opened, and the first water flow in the first pipeline drives the second power generation module to charge the energy storage module. This reduces the waste of wave energy. The high stability of the first water flow ensures the stability of the power generation power of the second power generation module and guarantees the charging efficiency and safety of the energy storage module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A top view of a hydropower generation device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the module structure of the main structure of the hydropower generation device in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the clamp locking mechanism of the hydropower generation device in an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the self-locking mechanism of the hydropower generation device in the embodiment of the present invention in the locked state; Figure 5 Schematic diagram of the structure of the self-locking mechanism of the hydropower generation device in the embodiment of the present invention in the unlocked state.

[0016] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0017] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] In order to solve the problem that the power generation devices of offshore platforms far away from land are significantly affected by wind and waves and have insufficient power generation stability, the present invention provides a hydropower generation device, which is jointly powered by a first power generation module, a second power generation module and an energy storage module, wherein the first power generation module is an oscillating float type power generation, which generates electricity based on the wave energy on the water surface; the second power generation module is a water flow type power generation, which is used to drive a turbine to generate electricity based on the input water flow. The first power generation module also includes a first pipeline, which includes a first guide cover arranged below the oscillating float. The bottom of the first guide cover is connected to the second power generation module through a first transmission pipe. When the oscillating float oscillates, the first guide cover can damp the movement of the oscillating float, thereby improving the movement stability of the oscillating float and thereby improving the power generation stability of the first power generation module. When the first power generation power of the first power generation module exceeds the load's power consumption and the energy storage module meets charging conditions, the first pipeline is opened, and the first water flow in the first pipeline drives the second power generation module to charge the energy storage module. This reduces the waste of wave energy. The high stability of the first water flow ensures the stability of the power generation power of the second power generation module and guarantees the charging efficiency and safety of the energy storage module. Especially under high-power demand, this can ensure the operating capacity and reliability of offshore platforms (hundreds of kilowatts and tens of thousands of kilowatts).

[0021] Specifically, if Figure 1 and Figure 2As shown, the hydropower generation device of this embodiment is primarily used in offshore waters and includes an installation platform fixed with foundation piles 110 (when modifying an offshore platform or offshore dock, the existing foundation piles of the offshore platform or offshore dock can be directly reused). The installation platform includes an above-water platform 100 and a submerged platform 200. A first power generation module and a second power generation module are mounted on the submerged platform 200, while an energy storage module 101 and a main controller (not shown) are mounted on the above-water platform 100. The first power generation module is an oscillating float-type power generation device that generates electricity based on waves, while the second power generation module is a current-generating device that generates electricity based on the flow of subsurface water.

[0022] The first power generation module includes an oscillating float 211 and a first generator 201. The oscillating float 211 is connected to the first generator 201 through a connecting rod 212 (the motor is driven by a transmission mechanism such as a crank, eccentric wheel, or a rotating linear motor). When the oscillating float 211 oscillates up and down with the waves, it converts wave energy into mechanical energy, which drives the first generator 201 to generate electricity.

[0023] The second power generation module is disposed underwater and is used to drive the turbine of the second generator 202 to generate electricity according to the input water flow.

[0024] In order to reduce the impact of the instability of natural waves on the power generation stability of the first power generation module, in this embodiment, the second power generation module is further provided with a first pipeline, which includes a first flow guide cover 220. The bottom of the first flow guide cover 220 is connected to the first transmission pipe 223. The first flow guide cover 220 is vertically arranged below the oscillating float 211. The limit of the oscillating float 211 can be used to generate a damping effect, improve the movement stability of the oscillating float 211, reduce the instability of natural wave energy, and improve the power generation stability of the first power generation module.

[0025] The first transmission pipe 223 is connected to the second power generation module. The movement of the oscillating float stimulates a directional water flow in the first pipe, generating a first water flow. The first water flow drives the turbine of the second generator 202 to generate electricity. The first pipe can improve the utilization of wave energy and enhance energy conversion efficiency.

[0026] To ensure the flow rate of the first water flow, in this embodiment, the first flow guide cover 220 is funnel-shaped.

[0027] The main controller is used to monitor the system status and adjust the power generation mode and power supply mode according to the power generation conditions and power consumption conditions to ensure system reliability.

[0028] Specifically, for example, when the first power generation of the first power generation module exceeds the load's power consumption and the energy storage module meets charging conditions, the first pipeline is opened, and the first water flow in the first pipeline drives the second power generation module to charge the energy storage module, thereby reducing the waste of wave energy. The high stability of the first water flow ensures the stability of the power generation of the second power generation module, thereby guaranteeing the charging efficiency and safety of the energy storage module.

[0029] When the first power generation of the first power generation module exceeds the load power consumption and the energy storage module is fully charged, the first pipeline is closed. The second generator 202 can also be an excitation generator. When the energy storage module is fully charged, the excitation current is disconnected to stop the second power generation module from generating power while maintaining the rotation of its turbine, thus avoiding losses caused by repeated starting and stopping of the turbine.

[0030] The main controller is also used to monitor the size of surface waves and the velocity of subsurface water flow to obtain predicted power generation for the first and second power generation modules. The power generation module with the higher predicted power generation is then used as the direct power supply, while the other power generation module is used as a charging source for the energy storage module. The energy storage module is then used to supplement the remaining power demand, thus reducing the need for grid connection between the two power generation modules with different operating conditions. When both the first and second power generation modules are enabled, the direct power supply is selected based on their actual power generation, with the second power generation module, due to its higher stability, being the preferred power source.

[0031] The second power generation module has dual inputs and the input water flow is highly stable. The power generation power of the second power generation module can also be flexibly adjusted by adjusting the opening of the first pipeline and the second pipeline, thereby improving the controllability of the matching between the power generation power and the power consumption, reducing the control complexity of the transformer, and improving the stability of power supply and power consumption.

[0032] To facilitate motor placement, in this embodiment, the first generator 201 of the first power generation module is housed within a first shroud 220. A filter grille 221 covers the top of the shroud 220, through which the connecting rod 212 passes for transmission connection. The filter grille 221 protects the first generator 201 and guides the incoming water flow, improving the flow quality of the first water flow.

[0033] In order to further increase the flow rate of the first water flow and improve the turbine efficiency, in this embodiment, the diameter of the first transmission pipe 223 gradually decreases along the transmission direction.

[0034] In order to improve the stability of the first water flow, in this embodiment, guide fins 222 are further provided on the inner side wall of the first flow guide cover 220. The guide fins 222 are preferably spiral fins.

[0035] To facilitate the installation platform settings, please refer to Figure 3 In this embodiment, the above-water platform 100 is set on the top of the fixed pile 110, and the underwater platform 200 is fixed to the waist of the fixed pile 110 through the clamp locking mechanism 130. The clamp of the clamp locking mechanism 130 is provided with a socket 131 and an ear plate 132. The underwater platform 200 includes an extended fixing rod 261. The fixing rod 261 (telescopic rod) is plugged and fixed into the socket 131 to fix the underwater platform 200 on the clamp locking mechanism 130.

[0036] Since the first power generation module and the second power generation module are both fixedly mounted on the underwater platform 200, the overall weight is relatively heavy. To facilitate installation, in this embodiment, a guide rail 120 is further provided at the location where the underwater platform 200 is mounted. The guide rail 120 is mounted on the lug 132 of the clamp locking mechanism 130. When the first power generation module, the second power generation module, and the underwater platform are installed, the guide rail 120 can be used to assist in transportation, thereby improving the convenience of installation and maintenance. Furthermore, since multiple power generation units are provided in a hydropower generation device, the overall size is large, and the guide rail 120 is often connected in multiple sections. To reduce damage to the guide rail 120 caused by tidal impact, a floating design is often adopted, whereby one section of the guide rail 120 is fixedly connected to the clamp locking mechanism, while the other sections can be connected to the clamp locking mechanism in a floating manner to cushion the impact of waves.

[0037] In order to prevent the guide rails 120 from being damaged due to excessive offset with the waves in strong winds and waves, in this embodiment, the guide rails 120 are hinged and connected by a self-locking mechanism. The self-locking mechanism is used to lock the guide rails when the wind and waves are greater than a preset self-locking threshold to prevent the offset with the waves from exceeding the safety limit and destroying the connection between the guide rails. For example, when the offset between the guide rails is too large, the pulling force on the connecting hinge increases, which is prone to pulling damage. When the angle between the two guide rails increases and exceeds the support range of the connecting hinge, shear damage is prone to occur. The pulling force will also damage the connection state of the fixed end.

[0038] Please refer to further Figure 4 and Figure 5 The self-locking mechanism includes a first fixing part 310 and a second fixing part 320, which are arranged relatively at the connection of the guide rails and are fixed on the two guide rails respectively. A locking hole 311 is provided in the first fixing part 310, and a hydraulic component and a locking pin 301 are provided in the second fixing part 320. The hydraulic component is used to control the extension and retraction of the locking pin 301.

[0039] In the unlocked state, Figure 5 As shown, the lock pin 301 is in a retracted state and is not connected to the first fixing portion 310. The first fixing portion 310 and the second fixing portion 320 can move freely along the corresponding guide rails. Figure 4As shown, the hydraulic assembly drives the locking pin 301 to extend into the locking hole 311 of the first fixing portion 310 , thereby locking the first fixing portion 310 and the second fixing portion 320 into one in the vertical direction, thereby locking the corresponding two guide rails.

[0040] Among them, since the guide rail 120 needs to convey equipment, the top thereof needs to be kept unobstructed. It can be understood that the first fixing part 310 and the second fixing part 320 should be arranged on the outer side of the guide rail 120, and the inner side of the guide rail 120 corresponds to the conveying channel.

[0041] To achieve automatic triggering of the hydraulic assembly, in this embodiment, the second fixed portion 320 includes a float 321, a lever 322, an active magnet 323, and a permanent magnet piston 325. A partition 324 is provided within the second fixed portion 320, separating an air chamber and a hydraulic chamber 326 from each other. The lever 322 and active magnet 323 are located in the air chamber, while the permanent magnet piston 325 is located in the hydraulic chamber 326. The float 321 is externally mounted and connected to the active magnet 323 at either end of the lever 322. During strong winds and waves, the float 321 is pushed upward by the waves, driving the active magnet 323 downward through the lever 322. This, in turn, drives the permanent magnet piston 325 downward through magnetic isolation, compressing the hydraulic chamber 326. The liquid within it pushes the lock pin 301 outward. As the wind and waves subside, the float 321 moves downward, causing the movable components to reverse their motion, expanding the hydraulic chamber 326, and retracting the lock pin 301.

[0042] Among them, when strong winds and waves occur, surface waves are formed first and underwater waves lag behind. The float 321 can preferentially respond to the surface waves to trigger self-locking protection, thereby ensuring the protection effect.

[0043] The hydropower generation device provided by the present invention is powered by a first power generation module, a second power generation module, and an energy storage module. The first power generation module employs an oscillating float-type power generation system, generating electricity based on surface wave energy; the second power generation module employs a flow-type power generation system, driving a turbine based on input water flow to generate electricity. The first power generation module also includes a first pipeline comprising a first flow deflector disposed below the oscillating float. The bottom of the first flow deflector is connected to the second power generation module via a first transmission pipe. When the oscillating float oscillates, the first flow deflector damps the movement of the oscillating float, improving its motion stability and, consequently, the power generation stability of the first power generation module. When the first power generation power of the first power generation module is greater than the power consumption of the load and the energy storage module meets the charging conditions, the first pipeline is opened, and the first water flow in the first pipeline drives the second power generation module to charge the energy storage module, which can reduce the waste of wave energy. The high stability of the first water flow can ensure the stability of the power generation power of the second power generation module and the charging efficiency and safety of the energy storage module. Especially under high-power electricity demand, the working capacity of the offshore platform (hundred-kilowatt, ten-thousand-kilowatt level) can be guaranteed.

[0044] The present invention has at least the following beneficial effects: (1) Based on the law of vertical wave energy transmission, a layered power generation structure is proposed, with the upper layer being an oscillating float for power generation and the lower layer being a turbine for power generation. The structure of the present invention exerts a synergistic effect. When the float moves up and down, it activates the first generator and simultaneously pushes the water flow along the spiral fins of the deflector to form a rotating downward jet. The diameter of the first transmission pipe gradually changes to form an energy-gathering pipe, which uses the Venturi effect to accelerate the water flow, increase the turbine inflow velocity, and assist the operation of the second generator.

[0045] (2) Through the scheduling logic of vertical layered power generation and energy storage and the structure of the second generator water inlet channel, the matching optimization of wave and current power generation output and power load is achieved. Considering that the surface wave power generation intensity is large but unstable, and the tidal power generation energy below the surface is slightly weaker, but the power generation is stable. Therefore, through the scheduling logic, the valves of the first and second water inlet channels are opened and closed. When the intensity of the sea waves is large, the upper layer power generation is mainly used for supply, and the bottom layer power generation enters the energy storage system for charging; when the intensity of the sea waves is weak, the bottom layer power generation is supplied, and the energy storage system discharges to fill the gap.

[0046] (3) Prefabricated integrated installation and operation method. The equipment can move on the guide rail through the rolling drive device, and be driven from outside the dock to the bottom of the dock panel. Then, the telescopic rod on the power generation module is inserted into the pile foundation locking device to fix the power generation module to the dock pile foundation. During maintenance, the telescopic rod is disengaged from the locking device, and a section of guide rail is set up along the outside of the dock, and the roller is driven to the outside of the dock for maintenance.

[0047] (4) The self-locking mechanism of the guide rail is triggered during high tide or large waves. It is mainly used to realize the dynamic anti-wave automatic locking function under high tide and huge wave impact conditions, and solve the risk of micro-wear and loosening of the bolt connection under wave vibration.

[0048] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The above-described embodiments merely represent several specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A hydropower generation device, characterized in that: include: The first power generation module and the second power generation module are arranged on the underwater platform, and the energy storage module and the main controller are arranged on the above-water platform, wherein: The first power generation module is used to obtain mechanical energy from waves according to the oscillating float to generate electricity according to the mechanical energy, and the second power generation module is used to drive a turbine according to the input water flow to generate electricity; The first power generation module further includes a first pipeline, which includes a first flow guide cover. The bottom of the first flow guide cover is connected to the second power generation module via a first transmission pipe. The first flow guide cover is longitudinally arranged below the oscillating float so that when the oscillating float oscillates, a first water flow can be stimulated in the first pipeline and provided to the second power generation module. The main controller is used to monitor the first power generation power of the first power generation module and the power consumption of the load, as well as the status of the energy storage module, and when the first power generation power is greater than the power consumption and the energy storage module meets the charging conditions, open the first pipeline and drive the second power generation module to charge the energy storage module through the first water flow.

2. The hydropower generation device according to claim 1, characterized in that: The top of the first air deflector is covered with a filter grid. The first generator of the first power generation module is arranged in the first air deflector. The first generator is connected to the oscillating float through a connecting rod.

3. The hydropower generation device according to claim 1, characterized in that: The diameter of the first transmission pipe gradually decreases along the transmission direction.

4. The hydropower generation device according to claim 1, characterized in that: The inner side wall of the first air guide cover is also provided with guide fins.

5. The hydropower generation device according to claim 1, characterized in that: The second power generation module further includes a second pipeline, the second pipeline is used to provide a second water flow based on the subsurface water flow, and the second power generation module is further used to generate electricity based on the parallel flow of the second water flow and the first water flow; The main controller is further configured to monitor the size of surface waves and the velocity of water flow below the surface, so as to obtain a first predicted power generation power of the first power generation module and a second predicted power generation power of the second power generation module according to the size of surface waves and the velocity of water flow below the surface, and to use the second power generation module as a direct power supply when the first predicted power generation power is less than the second predicted power generation power; The main controller is further used to adjust the openings of the first pipeline and the second pipeline to adjust the power generation power of the second power generation module.

6. The hydropower generation device according to claim 1, characterized in that: The above-water platform is arranged on the top of the fixed pile, and the underwater platform is fixedly arranged at the waist of the fixed pile through a clamp locking mechanism. The clamp locking mechanism includes a socket, and the underwater platform includes an extending fixed rod, and the fixed rod is plugged and fixed in the socket.

7. The hydropower generation device according to claim 6, characterized in that: The clamp locking mechanism is also connected to a guide rail, which is arranged below the underwater platform.

8. The hydropower generation device according to claim 7, characterized in that: The guide rails are of multi-section structure, and are connected by hinges and self-locking mechanisms. The hinges are used to enable each section of the guide rails to swing with the water flow within a predetermined range. The self-locking mechanism is used to reduce the floating amount between the guide rails when the wind and waves are greater than a preset self-locking threshold, so as to avoid the offset of the wave movement exceeding the safety limit and destroying the connection state between the guide rails.

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