阅读说明：本技术 一种海上太阳能、风能和波浪能互补发电设备 (Offshore solar energy, wind energy and wave energy complementary power generation equipment ) 是由 顾煜炯 和学豪 余志文 徐涌珂 雒玉新 于 2019-11-19 设计创作，主要内容包括：本发明提出一种海上太阳能、风能和波浪能互补发电设备,包括波浪能捕获装置、风能捕获装置、液压传递系统、太阳能光伏板、电力转换系统、浮动平台上层甲板、浮动平台下层甲板、支撑柱、水下浮箱以及锚泊系统。液压传递系统由波浪能转换液压子系统和风机液压子系统组成,波浪能捕获装置和风能捕获装置分别与两个子系统连接,驱动发电机发电,并与太阳能光伏板发出的电能通过电力转换系统结合,形成微电网,将电能存入储能装置或直接供给用户。波浪能转换液压子系统和风机液压子系统各自的主油路之间通过联通管路相连,由插装阀控制两条主油路的连通和关闭,在资源较好时,两套子系统独立运行,当资源较差时,两套子系统互补运行,驱动发电机发电。(The invention provides offshore solar energy, wind energy and wave energy complementary power generation equipment which comprises a wave energy capturing device, a wind energy capturing device, a hydraulic transmission system, a solar photovoltaic panel, a power conversion system, a floating platform upper deck, a floating platform lower deck, supporting columns, an underwater buoyancy tank and an anchoring system. The hydraulic transmission system consists of a wave energy conversion hydraulic subsystem and a fan hydraulic subsystem, the wave energy capturing device and the wind energy capturing device are respectively connected with the two subsystems to drive a generator to generate electricity, and the electricity is combined with the electric energy generated by the solar photovoltaic panel through the electric power conversion system to form a microgrid, and the electric energy is stored in an energy storage device or directly supplied to a user. The wave energy conversion hydraulic subsystem and the fan hydraulic subsystem are connected through a communication pipeline, the communication and the closing of the two main oil ways are controlled by the cartridge valve, the two subsystems run independently when resources are good, and the two subsystems run complementarily to drive the generator to generate power when the resources are poor.)

1. The utility model provides a complementary power generation facility of offshore solar energy, wind energy and wave energy which characterized in that: the power generation equipment comprises a wave energy capturing device, a wind energy capturing device, a hydraulic transmission system, a solar photovoltaic panel, a power conversion system, a floating platform upper deck, a floating platform lower deck, supporting columns, an underwater buoyancy tank and an anchoring system; the wave energy capturing device is arranged on the side face of a lower deck of the floating platform, the wind energy capturing device is arranged around the lower deck of the floating platform, the solar photovoltaic panel is arranged on an upper deck of the floating platform, and the hydraulic transmission system and the electric power conversion system are arranged on the lower deck of the floating platform; the hydraulic transmission system consists of a wave energy conversion hydraulic subsystem and a fan hydraulic subsystem, the wave energy capturing device and the wind energy capturing device are respectively connected with the wave energy conversion hydraulic subsystem and the fan hydraulic subsystem to drive a generator to generate electricity, and are combined with electric energy generated by the solar photovoltaic panel through the electric power conversion system to form a microgrid, and the electric energy is stored in an energy storage device or directly supplied to a user; the wave energy conversion hydraulic subsystem and the fan hydraulic subsystem are in complementary operation to drive the generator to generate power when resource conditions are poor.

2. An offshore solar, wind and wave energy complementary power plant according to claim 1, characterized in that: the wave energy capturing device comprises a floater, a floater arm and a double-stroke hydraulic cylinder.

3. An offshore solar, wind and wave energy complementary power plant according to claim 2, characterized in that: the floater is a cantilever type oscillating floater, the floater is hinged to the outer side face of a lower deck of the floating platform through a floater arm, the floater arm is connected with the lower deck of the floating platform through rolling bearings on two sides, bearing seats of the rolling bearings are fixedly welded on the side edge of the lower deck of the floating platform, bearings of the rolling bearings are sleeved at two ends of a cross rod of the floater arm, so that the floater can drive the floater arm to do swinging motion, the other side of the floater arm is connected with a flange plate on the top of the floater through bolts, the rigid and fixed connection between the floater and the floater arm is realized, the connection angle depends on the distance between the lower deck of the floating platform and the water surface, and the vertical axis of the floater in a free floating state of the still water surface is ensured; in extreme weather, the float is lifted off the water surface directly by the cable, thereby protecting the power generation equipment.

4. An offshore solar, wind and wave energy complementary power plant according to claim 3, characterized in that: one side of a hydraulic cylinder piston connecting rod of the cantilever type oscillating floater is connected with a lower deck fence of the floating platform, a rolling bearing is adopted to form a revolute pair, the other side of the hydraulic cylinder is hinged with the small cross rod of the floater arm, the rolling bearing is also adopted to form the revolute pair, and the floater can drive a hydraulic cylinder piston rod to perform piston motion when swinging the arm under the action of waves, so that mechanical energy is converted into hydraulic energy, and the hydraulic energy is converted into electric energy through a generator.

5. An offshore solar, wind and wave energy complementary power plant according to claim 2, characterized in that: the connection angle of the floater arm and the floater is adjustable, so that the distance between the floater and the water surface can be adjusted according to the wave height.

6. An offshore solar, wind and wave energy complementary power plant according to claim 1, characterized in that: the wind energy capturing device is a vertical shaft fan which can be opened and closed, and the fan drives a hydraulic pump when rotating, so that the generator rotates to generate electricity.

7. An offshore solar, wind and wave energy complementary power plant according to claim 5, characterized in that: the blades of the fan are semicircular, the blades can rotate along a rotating shaft of the blades, and when the fan normally operates, the blades rotate to 90 degrees, and the fan rotates under the action of wind; in extreme weather, the blades rotate to 0 degree, and the whole wind wheel forms a closed cylinder, so that wind cannot pass through the closed cylinder, and the fan is protected.

8. An offshore solar, wind and wave energy complementary power plant according to claim 1, characterized in that: the wave energy conversion hydraulic subsystem adopts a hydraulic cylinder which does work bidirectionally, and the floater can output energy both in an uplink direction and a downlink direction, so that the working capacity of the system is enhanced; the fan hydraulic subsystem drives the hydraulic pump to rotate by the fan, converts mechanical energy into hydraulic energy, and then drives the generator to generate power through the hydraulic motor.

9. An offshore solar, wind and wave energy complementary power plant according to claim 1, characterized in that: the power generation equipment is semi-submersible and is moored on the sea through the anchoring system.

10. An offshore solar, wind and wave energy complementary power plant according to claim 1, characterized in that: the fence around the lower deck of the floating platform is of a hollow steel structure, and the oil pipeline of the hydraulic transmission system is arranged inside the fence.

Technical Field

The invention relates to the technical field of power generation, in particular to offshore solar energy, wind energy and wave energy complementary power generation equipment.

Background

At present, a marine working platform and a sea island far off the shore are mainly powered by a diesel generator, so that the cost is high, the pollution is easily caused, and the development of marine renewable energy power generation has important significance for solving the problems of domestic power consumption of sea island residents, marine exploration, ecological sea island construction and the like. When the offshore renewable energy power generation platform is developed, the platform is high in manufacturing cost and not too large in area, so that the energy utilization rate needs to be improved in a limited space as much as possible. In addition, the offshore environment is severe, which puts high requirements on the viability of the platform, so that the self-protection function of the platform needs to be considered in the design process, thereby improving the reliability to the maximum extent.

At present, some offshore power generation technologies have characteristics, such as a buoy type offshore power generation platform (patent number CN201310455060.8), the power generation platform is composed of different wind power generation boxes, solar power generation boxes, ocean current power generation boxes and energy storage boxes, the boxes are connected through bolts, and a power generation system is modularized and convenient to mount and dismount. However, the structure is unstable due to the connection of multiple boxes, and the corresponding extreme weather resistant structure is not designed for each power generation device, so that the stability is difficult to guarantee when the wind waves are large. Patent No. CN201510441268.3 discloses an offshore wind energy and ocean wave energy combined power generation device. The power generation device consists of a wind driven generator and a wave energy generator. The wind turbine platform support body penetrates through the upper platform and is connected with the lower platform, and the hydraulic cylinder is arranged between the upper platform and the lower platform to absorb wave energy for power generation. This power generation facility has improved resource utilization to a certain extent, but the fan supporter is higher, and the horizontal axis fan power of overturning is big moreover, and this structural strength and the stability can the improvement to the platform require to the increase cost.

Disclosure of Invention

Aiming at the requirements of offshore exploration, communication and island power supply and the defects of the existing offshore power generation platforms, the invention provides offshore solar energy, wind energy and wave energy complementary power generation equipment. The equipment can be towed to a sea area needing to be used by a ship to supply power to users with the power demand on the sea.

A marine solar energy, wind energy and wave energy complementary power generation device comprises a wave energy capturing device, a wind energy capturing device, a hydraulic transmission system, a solar photovoltaic panel, a power conversion system, a floating platform upper deck, a floating platform lower deck, supporting columns, an underwater buoyancy tank and an anchoring system; the wave energy capturing device is arranged on the side face of the lower deck of the floating platform, the wind energy capturing device is arranged on the periphery of the lower deck of the floating platform, the solar photovoltaic panel is arranged on the upper deck of the floating platform, and the hydraulic transmission system and the electric power conversion system are arranged on the lower deck of the floating platform; the hydraulic transmission system consists of a wave energy conversion hydraulic subsystem and a fan hydraulic subsystem, the wave energy capturing device and the wind energy capturing device are respectively connected with the wave energy conversion hydraulic subsystem and the fan hydraulic subsystem to drive a generator to generate electricity, and are combined with electric energy generated by a solar photovoltaic panel through an electric power conversion system to form a microgrid, and the electric energy is stored in an energy storage device or directly supplied to a user; the wave energy conversion hydraulic subsystem and the fan hydraulic subsystem are in complementary operation when resource conditions are poor, and a generator is driven to generate electricity.

Further, the wave energy capturing device comprises a floater, a floater arm and a double-stroke hydraulic cylinder.

Preferably, the floater is a cantilever type oscillating floater, the floater is hinged to the outer side face of a lower deck of the floating platform through a floater arm, the floater arm is connected with the lower deck of the floating platform in a connection mode through rolling bearings on two sides, a bearing seat of each rolling bearing is fixedly welded to the side edge of the lower deck of the floating platform, bearings of each rolling bearing are sleeved at two ends of a cross rod of the floater arm, so that the floater can drive the floater arm to do swinging motion, the other side of the floater arm is connected with a flange plate at the top of the floater through bolts, the floater is rigidly and fixedly connected with the floater arm, the connection angle depends on the distance between the lower deck of the floating platform and the water surface, and the axis of the floater is ensured to; in extreme weather, the floater is lifted off the water surface directly through the cable, thereby protecting the power generation equipment.

Furthermore, one side of a piston connecting rod of a hydraulic cylinder of the cantilever type oscillating floater is connected with a lower deck fence of the floating platform, a rolling bearing is adopted to form a revolute pair, the other side of the hydraulic cylinder is hinged with the small cross rod of the floater arm, the rolling bearing is also adopted to form the revolute pair, the floater can drive a piston rod of the hydraulic cylinder to perform piston movement when the floater swings under the action of waves, mechanical energy is converted into hydraulic energy, and then the hydraulic energy is converted into electric energy through a generator.

Preferably, the connection angle of the float arm and the float is adjustable, so that the distance between the float and the water surface can be adjusted according to the wave height.

Preferably, the wind energy capturing device is a vertical shaft fan which can be opened and closed, and the fan drives the hydraulic pump when rotating, so that the generator rotates to generate electricity.

Further, the blades of the fan are semicircular, the blades can rotate along the rotating shaft of the blades, and when the fan normally operates, the blades rotate to 90 degrees, and the fan rotates under the action of wind; under extreme weather, the blade rotates to 0 degree, and whole wind wheel forms closed cylinder, makes wind can't pass to the protection fan.

The wave energy conversion hydraulic subsystem adopts a hydraulic cylinder which does work bidirectionally, and the floater can output energy both in an ascending direction and a descending direction, so that the working capacity of the system is enhanced; the fan hydraulic subsystem drives the hydraulic pump to rotate by the fan, converts mechanical energy into hydraulic energy, and then drives the generator to generate power through the hydraulic motor.

Preferably, the power plant is semi-submersible, moored at sea by means of a mooring system.

Preferably, the surrounding fence of the lower deck of the floating platform is a hollow steel structure, and an oil pipeline of the hydraulic transmission system is placed inside the hollow steel structure.

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

1. the offshore wave energy, the wind energy and the solar energy are combined, the integral power generation power and the energy utilization rate of the platform are improved, and the investment cost is reduced.

2. The semi-submersible type floating platform is adopted, is fixed through anchoring, can be towed to a target sea area by a ship as required for distributed power generation application, and compared with a floating platform, the floating platform has the advantages that the wave load on the sea surface is small, and the stability is high; compared with a seabed fixed foundation bottom-sitting type platform, the sea-bed seabed fixed foundation bottom-sitting type platform has the advantages that tidal range self-adaption can be achieved, flexibility is improved, and workload of offshore and seabed installation is reduced.

3. The wave energy is connected with the wind power generation device through a designed hydraulic system, so that the wind power generation device can independently generate power, and can also perform hydraulic energy complementary power generation through adjusting the cartridge valve, thereby improving the overall operation efficiency.

4. Under extreme weather conditions such as strong wind, strong waves and the like, the floater can be lifted off the water surface, and the fan can form a closed cylinder by adjusting the angle of the blade, so that the reliability of the whole device is improved.

5. The device completely adopts clean energy to form a micro-grid system, and the practicability in remote areas is high.

Drawings

FIG. 1 is an overall block diagram of an offshore solar, wind and wave energy complementary power generation plant of the present invention;

FIG. 2 is a structural diagram of a wave energy capturing device in an offshore solar, wind and wave energy complementary power generation device of the invention;

FIG. 3 is a block diagram of the blade opening and closing of a wind energy capture device in an offshore solar, wind and wave energy complementary power plant of the present invention;

fig. 4 is a structural diagram of a hydraulic system in the offshore solar, wind and wave energy complementary power generation equipment.

Detailed Description

The embodiments are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an overall structure diagram of an offshore solar, wind and wave energy complementary power generation device of the invention is shown. The device comprises a wave energy capturing device 1, a wind energy capturing device 2, a hydraulic transmission system 3, a solar photovoltaic panel 4, an electric power conversion system 5, a floating platform upper deck 6, a floating platform lower deck 7, supporting columns 8, an underwater buoyancy tank 9 and an anchoring system 10. The wave energy capturing arrangement 1 is arranged on the side surface of a lower deck 7 of the floating platform; the wind energy capture device 2 is arranged around a lower deck 7 of the floating platform; the hydraulic transmission system 3 and the electric power conversion system are arranged on a lower deck 7 of the floating platform, and the solar photovoltaic panel 4 is arranged on an upper deck 6 of the floating platform. The surrounding fence of the lower deck 7 of the floating platform is a hollow steel structure, and an oil pipeline of a wave energy and wind energy hydraulic transmission system is arranged in the hollow steel structure. The floating platform of the present invention is semi-submersible and moored at sea by mooring system 10.

Fig. 2 is a structural diagram of the wave energy capturing device 1 therein. The wave energy capturing device 1 is composed of a floater 1-1, a floater arm 1-2 and a double-stroke hydraulic cylinder 1-3. The floater 1-1 moves in a wave field by the action of wave load and self gravity to drive the double-stroke hydraulic cylinder 1-3 hinged on the floater arm 1-2 to move as a piston, high-pressure hydraulic oil is discharged, mechanical energy is converted into hydraulic energy, energy conversion is further carried out through a hydraulic system, a generator is driven, and finally electric energy is generated.

The floater adopts a cantilever type oscillating floater, the floater 1-1 is hinged to the outer side edge of a lower deck of the floating platform through a floater arm, the floater arm 1-2 is connected with the lower deck of the floating platform through rolling bearings at two sides, a bearing seat is fixedly welded at the side edge of the lower deck of the floating platform, and the bearings are sleeved at two ends of a cross rod 1-2 of the floater arm, so that the floater 1-1 can drive the floater arm 1-2 to do swinging motion. The other side of the floater arm 1-2 is connected with a flange plate at the top of the floater through a bolt, so that the floater 1-1 and the floater arm 1-2 are rigidly and fixedly connected, the connection angle depends on the distance between a lower deck of the floating platform and the water surface, and the vertical axis of the floater 1-1 is ensured in a free floating state on a still water surface. One side of a piston connecting rod 1-3 of the hydraulic cylinder is connected with a lower deck fence of the floating platform, a rolling bearing is adopted to form a revolute pair, the other side of the hydraulic cylinder is hinged with a small cross rod of a float arm, and the rolling bearing is also adopted to form the revolute pair. When the float arm swings, the piston rod 1-3 of the hydraulic cylinder can be driven to do piston motion, and mechanical energy is converted into hydraulic energy.

FIG. 3 is a structural diagram of the wind energy capture device 2, which is composed of a fan blade 2-1, a rotating shaft 2-2, an adjusting mechanism 2-3 and a baffle 2-4. When the wind turbine normally operates, the adjusting mechanism 2-3 rotates the fan blade 2-1 to 90 degrees, when wind passes through the wind wheel, the fan blade 2-1 is stressed, the wind turbine starts to rotate, the connected hydraulic pump is driven to convert mechanical energy into hydraulic energy, and electric energy is generated by driving the generator. When extreme weather occurs, the fan blade 2-1 is rotated to 0 degree by the adjusting mechanism 2-3 to form a closed cylinder, so that the fan is protected.

Fig. 4 is a structural view of the hydraulic transmission system 3 therein. The hydraulic transmission system 3 comprises a wave energy conversion hydraulic subsystem and a fan hydraulic subsystem, and the two subsystems are connected through cartridge valves 3-12. The wave energy conversion hydraulic subsystem comprises a double-loop hydraulic cylinder 3-1, a wave energy accumulator 3-2, a wave energy hydraulic motor 3-3, a wave energy generator 3-4, an oil supplementing tank 3-5 and an oil supplementing motor 3-6. The fan hydraulic subsystem comprises 3-7 parts of a wind turbine hydraulic pump, 3-8 parts of a wind turbine energy accumulator, 3-9 parts of a proportional valve, 3-10 parts of a wind turbine hydraulic motor and 3-11 parts of a generator. The double-loop hydraulic cylinders 3-1 of the wave energy floats are connected in parallel, wave energy obtained by the floats is collected, the wave energy is stabilized by the wave energy accumulator 3-2 and then drives the wave energy hydraulic motor 3-3, and the wave energy generator 3-4 is connected with the wave energy hydraulic motor 3-3. The wind turbine rotates to drive the wind turbine hydraulic pumps 3-7, the wind turbine hydraulic pumps 3-7 are connected in parallel, the oil paths are mixed and then stabilized through the wind turbine energy accumulator 3-8, and then the wind turbine hydraulic motors 3-10 and the following generators 3-11 are driven to generate electricity. The hydraulic circuits of the wind turbine and the wave energy floater can operate independently, and the two oil paths can be mixed by controlling the cartridge valves 3-12 to generate power complementarily.

The solar photovoltaic panel is laid on the upper deck 6 of the floating platform. The upper deck receives the illumination condition good, and the tiling mode can let solar photovoltaic board reduce the atress under extreme weather to improve the life-span.

Electric energy generated by wave energy and wind energy and electric energy generated by the photovoltaic panel are mixed through the power conversion system to form a micro-grid system, and the micro-grid system supplies electric energy to users. Meanwhile, an energy storage device is arranged in the system, redundant electric energy is stored in the energy storage device to balance the power supply and demand, and the electric energy can be consumed nearby or transmitted to the booster station through a submarine cable.

When the wind and wave resources are strong, the power of the wave energy and the wind power generation system is large and is close to or reaches the rated power, the cartridge valves 3-12 connecting the pipelines of the two sets of hydraulic subsystems are closed, and the hydraulic subsystems operate independently to respectively drive the hydraulic motors to do work.

When the wind speed is high and the waves are small, if the wind power generation system reaches the rated power, the cartridge valves 3-12 are controlled, part of hydraulic oil flows to the wave energy conversion hydraulic subsystem through the communicated oil way from the fan hydraulic subsystem, so that the pressure of the oil way of the wave energy conversion hydraulic subsystem is increased, the power generation power of the wave energy device is improved, and the power output fluctuation of the wave energy device is reduced. If the wind power generation system does not reach the rated power, an independent operation mode is still adopted; on the contrary, if the waves are large and the wind speed is low, the cartridge valves 3-12 are controlled, so that part of the hydraulic oil flows from the wave energy conversion hydraulic subsystem to the fan hydraulic subsystem through the communicating oil way. The cartridge valves 3-12 enable flow direction and pressure control.

When wind and wave resources are deficient, the flow of the system is small, the established oil pressure is low, at the moment, for equipment such as a pump and a motor of the hydraulic system, the flow is greatly lower than the rated design capacity, the volumetric efficiency of the hydraulic system is greatly reduced, the mechanical efficiency is reduced due to the reduction of the pressure, the overall efficiency of the system is low, and in order to improve the efficiency of the system to a certain extent, a control system gives corresponding instructions to control the cartridge valves 3-12, so that hydraulic oil in a fan hydraulic subsystem and hydraulic oil in a wave energy conversion hydraulic subsystem are collected into a subsystem through the pressure regulating valves 3-12 of the cartridge valves to drive a generator to generate electricity. In the above operation modes, in the process of injecting oil into the wave energy conversion hydraulic subsystem by the fan hydraulic subsystem or vice versa, the oil pressures of two pipelines before the hydraulic oil is collected into the inlet are required to be consistent, the pressure regulation can be realized by adopting the plug-in valves 3-12 on the communicated oil way, so that the plug-in valves are more matched with the hydraulic system to be injected, and the flow regulation and the reversing can be realized by the plug-in valves according to the requirements.

When strong wind and strong wave extreme weather occurs and the wind and the wave exceed the available limit of power generation, the floater is lifted off the water surface through the cable, the blades of the fan rotate to 0 degree, and the equipment realizes self protection.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.