Wind power generation system

Abstract

The invention discloses a wind power generation system, and relates to the technical field of expressway wind power generation, the wind power generation system comprises a current collecting device, a power generation device and a storage device, the current collecting device comprises a current collecting body, and the current collecting body is provided with a first wind collecting structure and a second wind collecting structure; the first wind collecting structure and the second wind collecting structure are used for collecting airflow in different directions, the power generation device comprises a vertical axis fan, and the vertical axis fan is located in the flow collecting body. The vertical axis draught fan is used for converting wind energy entering the current collecting body from the first wind collecting structure and the second wind collecting structure into electric energy, and the storage device is electrically connected with the power generation device and used for transporting and storing the electric energy generated by the power generation device. The vertical axis fan is adopted to be provided with the horizontal axis fan, installation and operation are not limited, and collection of wind in different directions can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of highway wind power generation, and particularly to a wind power generation system. Background Art

[0002] As a clean and renewable energy source, wind energy has received extensive attention and application due to its abundant resources, wide distribution, and low pollution. In the field of wind energy utilization, wind power generation technology has made remarkable progress and has gradually become an important part of the new energy field. Traditional wind power generation systems mostly use horizontal-axis wind turbines, which are mature in technology and widely used. However, in specific environments, such as the central median of highways, their installation and operation are restricted by many factors. Summary of the Invention

[0003] The purpose of the present invention is to provide a wind power generation system to solve the problems existing in the above-mentioned prior art. By using a vertical-axis wind turbine to drive a horizontal-axis wind turbine, the installation and operation are not restricted, and the collection of wind from different directions can be achieved.

[0004] To achieve the above purpose, the present invention provides the following solution:

[0005] The present invention provides a wind power generation system, including: a current collection device, a power generation device, and a storage device. The current collection device includes a current collection body, and the current collection body is provided with a first air collection structure and a second air collection structure. The first air collection structure and the second air collection structure are used to collect airflows in different directions. The power generation device includes a vertical-axis wind turbine, and the vertical-axis wind turbine is located in the current collection body. The vertical-axis wind turbine is used to convert the wind energy entering the current collection body from the first air collection structure and the second air collection structure into electrical energy. The storage device is electrically connected to the power generation device, and the storage device is used to transport and store the electrical energy generated by the power generation device.

[0006] Preferably, the current collector body includes a top plate, a bottom plate, a first drainage side wall, a second drainage side wall, a third drainage side wall, and a fourth drainage side wall; the upper ends of the first drainage side wall and the second drainage side wall are both connected to the top plate, and the lower ends of the first drainage side wall and the second drainage side wall are both connected to the bottom plate. The first drainage side wall and the second drainage side wall form the first air collecting structure; the upper ends of the third drainage side wall and the fourth drainage side wall are both connected to the top plate, and the lower ends of the third drainage side wall and the fourth drainage side wall are both connected to the bottom plate. The third drainage side wall and the fourth drainage side wall form the second air collecting structure; the first drainage side wall, the second drainage side wall, the top plate, and the bottom plate form a first air collecting channel of the first air collecting structure. A first air collecting port is provided at the outer end of the first air collecting structure, and the first air collecting port is communicated with the first air collecting channel; the third drainage side wall, the fourth drainage side wall, the top plate, and the bottom plate form a second air collecting channel of the second air collecting structure. A second air collecting port is provided at the outer end of the second air collecting structure, and the second air collecting port is communicated with the second air collecting channel.

[0007] Preferably, the first drainage side wall protrudes away from the second drainage side wall, the second drainage side wall protrudes away from the first drainage side wall, the length of the first drainage side wall is greater than the length of the second drainage side wall, and the distance between the first drainage side wall and the second drainage side wall gradually decreases from the first air collecting port in a direction away from the first air collecting port; the third drainage side wall protrudes away from the fourth drainage side wall, the fourth drainage side wall protrudes away from the third drainage side wall, the length of the third drainage side wall is greater than the length of the fourth drainage side wall, and the distance between the third drainage side wall and the fourth drainage side wall gradually decreases from the second air collecting port in a direction away from the second air collecting port.

[0008] Preferably, the current collector body further includes a first connecting side wall and a second connecting side wall. The upper ends of the first connecting side wall and the second connecting side wall are both connected to the top plate, and the lower ends of the first connecting side wall and the second connecting side wall are both connected to the bottom plate. One side of the first connecting side wall and one side of the second connecting side wall are both connected to the first air collecting structure, and the other side of the first connecting side wall and the other side of the second connecting side wall are both connected to the second air collecting structure. The first connecting side wall, the second connecting side wall, the top plate, and the bottom plate form a space for arranging the vertical axis fan.

[0009] Preferably, the first air collecting structure includes two first air inlets located at the outer ends of the first air collecting structure; the second air collecting structure includes two second air inlets located at the outer ends of the second air collecting structure; both of the two first air inlets face one side lane, and both of the two second air inlets face the other side lane; the first air inlets and the second air inlets are arranged in parallel.

[0010] Preferably, the first air collecting structure and the second air collecting structure are symmetrically arranged along a first symmetry axis, the two first air inlets are symmetrically arranged along a second symmetry axis, the two second air inlets are symmetrically arranged along the second symmetry axis, and the first symmetry axis and the second symmetry axis are in the same plane and perpendicular to each other.

[0011] Preferably, there are several air collecting devices and several power generation devices. The air collecting devices are arranged in the central isolation belt, and several air collecting devices are evenly distributed along the length direction of the central isolation belt. The air collecting devices and the power generation devices are in one-to-one correspondence.

[0012] Preferably, the storage device includes an energy storage converter and a storage battery. The energy storage converter is connected to the storage battery. The energy storage converter is used to control the charging and discharging processes of the storage battery and perform AC-DC conversion. The storage battery is connected to the power generation device, and the storage battery is used to store electric energy.

[0013] Preferably, the power generation device further includes a control system. The control system includes a frequency converter, an inverter and a grid connection controller. The frequency converter and the inverter are both connected to the vertical axis wind turbine. The frequency converter is used to control the rotation speed and output power of the vertical axis wind turbine. The inverter is used to convert the alternating current generated by the vertical axis wind turbine into direct current or convert direct current into alternating current. The power grid and the storage battery are both connected to the grid connection controller. The grid connection controller is used to monitor the parameters of the power grid and adjust the charge and discharge state of the storage battery.

[0014] Preferably, it further includes an intelligent management and control platform. The intelligent management and control platform includes a video monitoring workstation, an operation workstation, an engineer workstation, a coordination controller and an EMS system. The video monitoring workstation includes a camera. The camera is used to monitor and record the vertical axis wind turbine. The operation workstation is used for staff to issue daily operation instructions and scheduling work for the wind power generation system. The engineer workstation is responsible for the configuration, configuration, supervision, control and maintenance work of the wind power generation system. The video monitoring workstation, the operation workstation and the engineer workstation are all connected to the coordination controller. The coordination controller is used to integrate and coordinate the work of the video monitoring workstation, the operation workstation and the engineer workstation. The EMS system is respectively connected to the power generation device and the storage device.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] In view of the windy environment on highways, the present invention realizes the sustainable development of highways through the installation of a flow collection device, changing the layout position, adjusting the type of wind turbines, and using efficient, stable, and economical vertical-axis wind turbines, providing new ideas for the innovative development of energy integration. The flow collection device adopted by the present invention can collect winds from different directions, enabling the collection and timely conversion of wind energy, improving the availability of the device; at the same time, it provides a new conversion method for renewable energy utilization, introducing a new utilization scheme for ecological sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic diagram of the application of the wind power generation system according to some embodiments of the present invention;

[0019] Figure 2 Axonometric view of the flow collection device and the vertical-axis wind turbine according to some embodiments of the present invention;

[0020] Figure 3 Top view sectional view of the flow collection device and the vertical-axis wind turbine according to some embodiments of the present invention;

[0021] Figure 4 Schematic diagram of α and θ according to some embodiments of the present invention;

[0022] Figure 5 Side view sectional view of the flow collection device and the vertical-axis wind turbine according to some embodiments of the present invention;

[0023] Figure 6 Front view of the vertical-axis wind turbine according to some embodiments of the present invention;

[0024] Figure 7 Top view of the vertical-axis wind turbine according to some embodiments of the present invention;

[0025] Figure 8 Schematic diagram of the structure of the wind power generation system according to some embodiments of the present invention;

[0026] Figure 9 Basic wind speed curve diagram according to some embodiments of the present invention;

[0027] Figure 10Gust wind speed curve graph of some embodiments of the present invention;

[0028] Figure 11 Gradual change wind speed graph curve of some embodiments of the present invention;

[0029] Figure 12 Random wind speed curve graph of some embodiments of the present invention;

[0030] Figure 13 Comprehensive wind speed curve graph of some embodiments of the present invention;

[0031] Figure 14 Simulation of the present invention Figure 1 ;

[0032] Figure 15 Simulation of the present invention Figure 2 ;

[0033] Figure 16 Power coefficient curve graph of a vertical axis wind turbine;

[0034] In the figure: 100 - wind power generation system, 1 - current collection device, 2 - vertical axis wind turbine, 3 - first axis of symmetry, 4 - second axis of symmetry, 5 - top plate, 6 - bottom plate, 7 - first drainage side wall, 8 - second drainage side wall, 9 - third drainage side wall, 10 - fourth drainage side wall, 11 - first air intake, 12 - second air intake, 13 - first air intake channel, 14 - second air intake channel, 15 - first connection side wall, 16 - second connection side wall, 17 - wind wheel shaft, 18 - blade, 19 - upper support disk, 20 - lower support disk, 21 - main machine, 22 - flange bearing. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The purpose of the present invention is to provide a wind power generation system to solve the problems existing in the above-mentioned prior art. By using a vertical axis wind turbine to drive a horizontal axis wind turbine, the installation and operation are not restricted, and the collection of wind in different directions can be realized.

[0037] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0038] As Figures 1 to 8As shown in the figure, this embodiment provides a wind power generation system 100, which is applied on highways and includes: a current collection device 1, a power generation device, and a storage device. The installation height of the current collection device 1 is 0.8 - 1.2 meters from the ground. The current collection device 1 includes a current collection body, and the current collection body is provided with a first air collection structure and a second air collection structure. The first air collection structure and the second air collection structure are used to collect airflows in different directions. The power generation device includes a vertical axis wind turbine 2, and the vertical axis wind turbine 2 is preferably a Darrieus type wind turbine. The vertical axis wind turbine 2 is located in the current collection body. The vertical axis wind turbine 2 is used to convert the wind energy entering the current collection body from the first air collection structure and the second air collection structure into electrical energy. The storage device is electrically connected to the power generation device. The storage device is used to transport and store the electrical energy generated by the power generation device. The electrical energy is used to supply power to a load device, and the load device includes electrical equipment along the highway. In view of the windy environment on highways, the present invention installs a current collection device, changes the layout position, adjusts the type of the wind turbine, and realizes the sustainable development of highways through an efficient, stable, and economical vertical axis wind turbine, providing new ideas for the innovative development of energy integration. The current collection device adopted by the present invention can collect winds in different directions, can realize the collection and timely conversion of wind energy, and improves the availability of the device; at the same time, it provides a new conversion method for renewable energy utilization, introducing a new utilization scheme for ecological sustainable development.

[0039] In some specific embodiments, both the current collection device 1 and the power generation device are several. The current collection device 1 is arranged in the central isolation belt of the highway. Several current collection devices 1 are evenly distributed along the length direction of the central isolation belt. The distance L between adjacent current collection devices 1 is preferably four times the diameter of the vertical axis wind turbine 2. The current collection device 1 and the power generation device correspond one by one.

[0040] In some specific embodiments, the current collection device 1 is made of Q235 steel, and the exterior of the current collection device 1 is sprayed with anti-glare material and protective paint.

[0041] In some specific embodiments, the vertical axis wind turbine 2 is fixed in the middle of the current collection device 1. The vertical axis wind turbine 2 includes blades 18, a bracket, a wind wheel shaft 17, a main engine 21, an upper bracket plate 19, a lower bracket plate 20, a flange bearing 22, a generator, etc. The cross-section of the blade 18 is in a water droplet shape (the cross-section is as Figure 7(the shaded part shown), the blade 18 has a streamlined profile. Specifically, the leading edge of the blade 18 (i.e., the windward side) is an arc protruding away from the trailing edge of the blade 18. The leading edge of the blade 18 is relatively rounded, and the trailing edge of the blade 18 (i.e., the leeward side) is a tip. The cross-sectional dimension of the blade 18 gradually narrows from the leading edge of the blade 18 towards the trailing edge of the blade 18. The water-drop-shaped setting of the blade 18 can reduce the weight of the blade 18 while reducing the thickness. A number of main bodies 21 of the blade 18 are arranged on the wind turbine shaft 17 through flange bearings 22. The height L1 from the central position of the blade 18 to the ground is 0.2 - 0.4 meters. While providing rotational connection, the flange bearings 22 can bear large radial loads and axial loads. The main bodies 21 of the blade 18 are respectively connected to the blade 18 and the generator. Both the upper support disc 19 and the lower support disc 20 are connected to the blade 18 through brackets. The brackets are snap-connected to the blade 18. The upper support disc 19 and the lower support disc 20 are respectively connected to the brackets by T-bolts. Both the upper support disc 19 and the lower support disc 20 are rotationally connected to the wind turbine shaft 17 through flange bearings 22.

[0042] When the wind speed in the median strip of the highway reaches a certain threshold (generally above 5 m / s), the water-drop-shaped blade 18 generates a rotational torque under the action of the airflow; the blade 18 is installed on the wind turbine shaft 17 and supported by flange bearings 22 to reduce friction and ensure smooth operation; the blade 18 converts wind energy into mechanical energy and transmits it to the transmission device through the wind turbine shaft 17; the transmission device transmits the energy to the generator to make it reach the synchronous speed, thereby converting mechanical energy into electrical energy. The braking device intervenes when the wind speed is abnormal or maintenance is required, and realizes the deceleration and shutdown of the vertical axis wind turbine 2 by means of friction.

[0043] In some specific embodiments, the air collection body includes a top plate 5, a bottom plate 6, a first air diversion side wall 7, a second air diversion side wall 8, a third air diversion side wall 9, and a fourth air diversion side wall 10; the top plate 5 and the bottom plate 6 are arranged in parallel, and the distance between the top plate 5 and the bottom plate 6 is 0.6 - 1.4 m, which can collect almost all the wind into the air collection body. The top plate 5 is perpendicular to the first air diversion side wall 7, the second air diversion side wall 8, the third air diversion side wall 9, the fourth air diversion side wall 10, and the wind wheel shaft 17 of the vertical axis fan 2 respectively; the upper ends of the first air diversion side wall 7 and the second air diversion side wall 8 are both connected to the top plate 5, and the lower ends of the first air diversion side wall 7 and the second air diversion side wall 8 are both connected to the bottom plate 6, and the first air diversion side wall 7 and the second air diversion side wall 8 form a first air collection structure; the upper ends of the third air diversion side wall 9 and the fourth air diversion side wall 10 are both connected to the top plate 5, and the lower ends of the third air diversion side wall 9 and the fourth air diversion side wall 10 are both connected to the bottom plate 6, and the third air diversion side wall 9 and the fourth air diversion side wall 10 form a second air collection structure; the first air diversion side wall 7, the second air diversion side wall 8, the top plate 5, and the bottom plate 6 form a first air collection channel 13 of the first air collection structure, and a first air collection port 11 is arranged at the outer end of the first air collection structure, and the first air collection port 11 is communicated with the first air collection channel 13; the third air diversion side wall 9, the fourth air diversion side wall 10, the top plate 5, and the bottom plate 6 form a second air collection channel 14 of the second air collection structure, and a second air collection port 12 is arranged at the outer end of the second air collection structure, and the second air collection port 12 is communicated with the second air collection channel 14. The vertical distance between the plane where the first air collection port 11 is located and the central axis of the vertical axis fan 2 and the vertical distance between the plane where the second air collection port 12 is located and the central axis of the vertical axis fan 2 are both about 60 cm.

[0044] In some specific embodiments, the first air diversion side wall 7 protrudes in a direction away from the second air diversion side wall 8, the second air diversion side wall 8 protrudes in a direction away from the first air diversion side wall 7, the length of the first air diversion side wall 7 is greater than the length of the second air diversion side wall 8, and the distance between the first air diversion side wall 7 and the second air diversion side wall 8 gradually decreases from the first air collection port 11 in a direction away from the first air collection port 11; the third air diversion side wall 9 protrudes in a direction away from the fourth air diversion side wall 10, the fourth air diversion side wall 10 protrudes in a direction away from the third air diversion side wall 9, the length of the third air diversion side wall 9 is greater than the length of the fourth air diversion side wall 10, and the distance between the third air diversion side wall 9 and the fourth air diversion side wall 10 gradually decreases from the second air collection port 12 in a direction away from the second air collection port 12, that is, the first air collection channel 13 and the second air collection channel 14 form a streamlined expansion port from the inner end to the outer end (the outer end is the position where the first air collection port 11 and the second air collection port 12 are located). The first air collection channel 13 and the second air collection channel 14 play a role in diverting the wind, so that the airflow entering the first air collection channel 13 from the first air collection port 11 and the airflow entering the second air collection channel 14 from the second air collection port 12 can be stabilized.

[0045] In this embodiment, the first drainage sidewall 7 is longer than the second drainage sidewall 8, and the third drainage sidewall 9 is longer than the fourth drainage sidewall 10. The first drainage sidewall 7 and the third drainage sidewall 9 are used to guide the strong wind (main stream wind) generated by the vehicle traveling at high speed to smoothly enter the air collecting device 1, expanding the air collecting area and dispersing the wind pressure at the same time to prevent local structure overload. The second drainage sidewall 8 and the fourth drainage sidewall 10 are used for auxiliary diversion to adjust the flow direction of lateral or low-speed airflows, reduce the generation of turbulence, and ensure that the airflows are evenly delivered to the area where the blades 18 of the vertical axis wind turbine 2 are located. The first drainage sidewall 7 is placed opposite to the second drainage sidewall 8 with the first drainage sidewall 7 being longer, and the third drainage sidewall 9 is placed opposite to the fourth drainage sidewall 10 with the third drainage sidewall 9 being longer. The cross-sectional areas of the first air collecting channel 13 and the second air collecting channel 14 continuously decrease from the outside to the inside, forming a contraction section inside. The arc-shaped design of the first drainage sidewall 7, the second drainage sidewall 8, the third drainage sidewall 9, and the fourth drainage sidewall 10 makes the first air inlet and the second air inlet suitable for the wind to enter. In this embodiment, the included angle α between the tangent line at the inner end of the first drainage sidewall 7 and the tangent line at the inner end of the second drainage sidewall 8 is 60 degrees, and the included angle θ between the tangent line at the inner end of the third drainage sidewall 9 and the tangent line at the inner end of the fourth drainage sidewall 10 is 60 degrees, and α is equal to θ.

[0046] In some specific embodiments, the edges of the first air collecting opening 11 and the second air collecting opening 12 are both rounded to reduce the generation of eddy currents and turbulence and lower the resistance during air circulation.

[0047] In some specific embodiments, the air collecting body further includes a first connecting sidewall 15 and a second connecting sidewall 16. The upper ends of the first connecting sidewall 15 and the second connecting sidewall 16 are both connected to the top plate 5, the lower ends of the first connecting sidewall 15 and the second connecting sidewall 16 are both connected to the bottom plate 6, one side of the first connecting sidewall 15 and one side of the second connecting sidewall 16 are both connected to the first air collecting structure, the other side of the first connecting sidewall 15 and the other side of the second connecting sidewall 16 are both connected to the second air collecting structure. The first connecting sidewall 15 protrudes away from the second connecting sidewall 16, and the second connecting sidewall 16 protrudes away from the first connecting sidewall 15. The first connecting sidewall 15, the second connecting sidewall 16, the top plate 5, and the bottom plate 6 form a space for arranging the vertical axis wind turbine 2.

[0048] In some specific embodiments, the first air collecting structure includes two first air inlets 11 which are located at the outer ends of the first air collecting structure; the second air collecting structure includes two second air inlets 12 which are located at the outer ends of the second air collecting structure; both of the two first air inlets 11 face one side lane, and both of the two second air inlets 12 face the other side lane, so as to achieve two-way air collection; the first air inlets 11 and the second air inlets 12 are arranged in parallel. In this embodiment, the first air collecting structure and the second air collecting structure can achieve multi-air inlet two-way air collection. The first air collecting channel 13 can stably convey the air entering from the first air inlets 11 in the first air collecting channel 13, and the second air collecting channel 14 can stably convey the air entering from the second air inlets 12 in the second air collecting channel 14.

[0049] In this embodiment, by providing two first air inlets 11 and two second air inlets 12, two-way air inlet can be realized for the oncoming wind and wake wind generated during the vehicle driving process, symmetrically capturing the positive wind, reverse wind and lateral wind generated by the vehicle driving on the highway. The positive wind refers to the wind in the same direction as the vehicle driving direction. When the vehicle is driving on the highway, it will push the air in front forward, forming a relatively high-pressure area in front of the vehicle, so that the air flows along the vehicle driving direction, generating positive wind. Reverse wind: The wind opposite to the vehicle driving direction. During the vehicle driving process, low-pressure areas of air will be formed on both sides and behind the vehicle. For oncoming vehicles, due to the air flowing into the low-pressure areas on both sides and behind the vehicle, an air flow opposite to the vehicle driving direction will be formed, that is, reverse wind. Lateral wind: The wind perpendicular to the lane direction, including natural cross wind or lateral air flow generated when the vehicle passes by on the side. The design of the two first air inlets 11 and the two second air inlets 12 can balance the wind pressure distribution, reduce the generation of eddy currents and turbulence, stably convey the air flow passing through the air collecting device 1, and avoid damage to the air collecting device 1 caused by structural vibration due to unilateral wind force overload. The first air collecting channel 13 and the second air collecting channel 14 adopt a streamline-shaped enlarged opening design, which can increase the air inlet area and at the same time reduce the air resistance through smooth edge treatment. The design of the two first air inlets 11 and the two second air inlets 12 ensures that when a certain air inlet (a certain first air inlet 11 or a certain second air inlet 12) of the air collecting device 1 cannot work due to blockage or damage, the remaining air inlets (the remaining first air inlets 11 or the remaining second air inlets 12) can still maintain partial functions.

[0050] In some specific embodiments, the first air collecting structure and the second air collecting structure are symmetrically arranged along the first symmetry axis 3, the two first air inlets 11 are symmetrically arranged along the second symmetry axis 4, the two second air inlets 12 are symmetrically arranged along the second symmetry axis 4, and the first symmetry axis and the second symmetry axis are in the same plane and perpendicular.

[0051] The current collector device 1 of this embodiment is placed on the central divider of the highway in an axisymmetric form. The first air collection structure and the second air collection structure are symmetrically arranged along the first axis of symmetry 3, so that symmetrical pressure gradients are formed when the air flows on both sides enter the current collector device 1. The air flow is accelerated and stably transported to the vertical axis wind turbine 2 through the internal contraction sections of the first air collection channel 13 and the second air collection channel 14; the two first air inlets 11 are symmetrically arranged along the second axis of symmetry 4, and the two second air inlets 12 are symmetrically arranged along the second axis of symmetry 4, which can enhance the ability of the structure to resist natural crosswinds or transient wind pressures and lateral wind loads when vehicles pass at high speeds.

[0052] In some specific embodiments, the storage device includes an energy storage converter and a storage battery. The electric energy generated by the vertical axis wind turbine 2 is stored in the storage battery through the energy storage converter for efficient utilization of electric energy. The energy storage converter is connected to the storage battery. The energy storage converter is used to control the charging and discharging processes of the storage battery and perform AC-DC conversion. The storage battery is connected to the power generation device, and the storage battery is used to store electric energy.

[0053] In some specific embodiments, the power generation device further includes a control system. The control system is used to coordinate the operation of the vertical axis wind turbine 2; the control system includes a frequency converter, an inverter and a grid connection controller. Both the frequency converter and the inverter are connected to the vertical axis wind turbine 2; the frequency converter adjusts the rotation speed and output power of the vertical axis wind turbine 2 according to the wind speed in the central divider of the highway and the grid demand. When the vertical axis wind turbine 2 starts, stops or the wind speed in the central divider changes sharply, the frequency converter reduces the power fluctuation by adjusting the power transmission to protect the storage battery in the storage device; the inverter is used to convert the alternating current generated by the vertical axis wind turbine 2 into direct current or convert the direct current into alternating current that meets the requirements of the highway grid where it is located according to the grid demand. For the storage device, when the storage battery is charging, the inverter converts the transmitted electric energy from alternating current to direct current, and when the storage battery is discharging, the inverter converts the electric energy from direct current to alternating current and outputs it to the grid; both the grid and the storage battery are connected to the grid connection controller. The grid connection controller monitors parameters such as the voltage and frequency of the highway grid where it is located, and adjusts the charge and discharge state of the storage battery. When the wind power generation is excessive and the grid demand is insufficient, the grid connection controller will instruct the storage battery to charge and store the excess electric energy. When the wind power generation is insufficient and the grid demand increases, it will instruct the storage battery to discharge and supplement the power supply.

[0054] In some specific embodiments, it further includes an intelligent control platform which is used to monitor in real time and ensure the efficient and stable operation of the system. The intelligent control platform includes a video monitoring workstation, an operation workstation, an engineer workstation, a coordination controller, and an EMS system. The video monitoring workstation includes cameras installed in the area where the vertical axis wind turbine 2 is located. The cameras are used to conduct all-round and all-weather monitoring and recording of the vertical axis wind turbine 2, so that the staff can view the operating status of the unit and the surrounding environmental conditions in real time. The operation workstation is respectively connected to the video monitoring workstation and the EMS system. The operation workstation is used for the staff to issue daily operation instructions and carry out dispatching work for the vertical axis wind turbine 2 and the battery. That is, through the data analysis of the EMS system and combined with the video monitoring of the video monitoring workstation, the staff can understand the various parameters of the vertical axis wind turbine 2 and the battery, and perform remote control such as starting, stopping, and adjusting the power of the vertical axis wind turbine 2 and the battery. The engineer workstation is responsible for the configuration, setup, supervision, control, and maintenance of the wind power generation system 100. That is, system engineers perform overall configuration, parameter setting, algorithm coordination, etc. of the wind power generation system 100 here. The video monitoring workstation, the operation workstation, and the engineer workstation are all connected to the coordination controller. The coordination controller is used to integrate and coordinate the work of the video monitoring workstation, the operation workstation, and the engineer workstation. That is, it coordinates the operation of each station in the intelligent control platform. The EMS system is respectively connected to the power generation device and the storage device. The EMS system (full name: Energy Management System) is used to monitor, control, and optimize the energy flow and energy consumption of the power generation device and the storage device in real time. That is, the EMS system collects various data such as the operating status of the vertical axis wind turbine 2, the energy consumption of the battery, the charge and discharge status, temperature, voltage, and current of the battery, and reasonably arranges the charge and discharge operations of the battery. The wind power generation system 100 of this embodiment can collect and generate electricity from the wind energy generated by highway vehicles and can perform intelligent control.

[0055] In view of the windy environment on highways, the present invention realizes the sustainable development of highways through measures such as installing a flow collection device 1, changing the layout position, adjusting the type of wind turbines, and the installation height, etc., and provides new ideas for the innovative development of the integration of transportation and energy. The present invention innovatively adjusts the overall height of the device. While utilizing the instantaneous wind of the vehicle flow, it does not block the line of sight of vehicle driving, occupies a small land area, has little impact on the environment. At the same time, compared with other ordinary power generation devices, it effectively improves the anti-overturning ability of the device against strong winds, and can continuously generate electricity at high wind speeds, greatly improving the production efficiency and ensuring the stability of the system. The flow collection device 1 adopted by the present invention can realize the collection and timely conversion of wind energy, greatly reducing the vortices generated when the wind flow enters the device, and improving the availability of the device; at the same time, it provides a new conversion method for the utilization of renewable energy, introducing a new utilization scheme for ecological sustainable development. The present invention adjusts the blades 18 of the vertical axis wind turbine 2, improving the efficiency of the wind power generation set, increasing the overall power generation while reducing the material cost. The intelligent control platform adopted by the present invention can effectively control the wind turbines in all aspects, take timely measures for the problems generated, reduce the damage to the wind turbines under faults and natural weather conditions, reduce the operation cost. At the same time, the present invention integrates power storage, supervision, and power consumption management, efficiently utilizes electric energy, reduces losses, reduces transportation costs, and realizes the orderly management of big data.

[0056] The process of simulating the flow collection device 1 of this embodiment is as follows:

[0057] The wind speed model uses the four-component superposition method to superimpose the basic wind, gust wind, gradually changing wind, and random wind to make a simulation diagram, making the result more realistic.

[0058] The wind speed model using the four-component superposition method: v = v b + v g + v r + v t , where v b is the basic wind, v g is the gust wind, v r is the gradually changing wind, v t is the random wind, and the units of v, v b , v g , v r and v t are all m / s.

[0059] Basic wind: It can be approximately determined by the Weibull distribution parameters measured in the wind farm. The formula for the basic wind is as follows:

[0060]

[0061] In the formula, the scale parameter A and the shape parameter k can be estimated according to the measured data of the wind farm.

[0062] During actual operation and simulation, it is approximately considered that v b is a component that does not change with time, that is, v b is taken as a constant.

[0063] Gust: Describes the characteristic of sudden change in wind speed and is usually used to analyze the impact of the wind power system on the grid voltage fluctuation. The formula for gust is as follows:

[0064]

[0065] In the formula, v gmax is the gust peak, in m / s; T1 is the gust start time, in s; T g is the gust period, in s; t1 is the gust start time, in s.

[0066] Gradual wind: Describes the characteristic of gradual change in wind speed. The formula for gradual wind is as follows:

[0067]

[0068] In the formula, v rmax is the gradual wind peak, in m / s; T is the gradual wind duration, in s; T r1 is the gradual wind start time, in s; T r2 is the gradual wind end time, in s; t2 is the gradual wind start time, in s.

[0069] Random wind: Describes the random characteristic of wind speed change at a specific height. The formula for random wind is as follows:

[0070] v t = v tmax R andom (-1,1)cos(ω V +φ V )

[0071] In the formula, v tmax is the maximum value of the random wind, in m / s; R andom is a random variable uniformly distributed between -1 and 1; ω V is the average distance of wind speed fluctuation, in rad / s; φ V is the phase angle, in rad.

[0072] Aerodynamic performance model of the vertical-axis wind turbine 2:

[0073] For a vertical-axis wind turbine 2 with a rotor radius of R, when the wind speed is v, the mechanical power generated is:

[0074]

[0075] In the formula, P m is the mechanical efficiency, with the unit of W; R is the radius of the wind turbine; v is the wind speed, with the unit of m / s; C P (β,λ) is the power coefficient; λ is the tip speed ratio, and the expression is:

[0076] The mechanical torque is:

[0077]

[0078] In the formula, ρ is the air density. Under normal circumstances, that is, at 20 degrees Celsius, it is taken as 1.205 kg / m 3 ; v 叶 is the wind speed passing through the blade 18 of the vertical axis wind turbine 2; ω is the rotational angular velocity of the blade 18. In this embodiment, it is taken as 20 r / min; Cp(β,λ) is the power coefficient of the vertical axis wind turbine 2; Cp is related to the tip speed ratio λ and the pitch angle β of the blade 18, and the relationship is as follows:

[0079]

[0080] In the formula, C f is the design constant of the blade 18. In this embodiment, the value is 3, and r is taken as 12.

[0081] According to different values of β and λ, the Cp curve can be obtained as Figure 16 shown. It can be seen from the figure that for a certain determined pitch angle β, there is a maximum value of Cp. That is to say, when the wind turbine is operating, it cannot ensure that the maximum power output can be generated at all wind speeds. The theoretical maximum value of Cp is 0.593, which is the famous Betz limit.

[0082] Overall modeling of the wind power generation system 100:

[0083] Package each module established in the above system and connect them according to the pre-designed scheme to build the entire self-built wind power generation system 100. The system simulation module built under Simulink is as Figure 1 shown.

[0084] The designed rated wind speed of the vertical axis wind turbine 2 is 9.5 m / s, and the rated speed is 3000 r / min. Without affecting the simulation effect, the simulation time of the system is set to 0.1 second.

[0085] To effectively simulate the characteristics of each part of the system, the basic wind speed is set to 3 m / s, the gust peak is set to 6 m / s, the maximum value of the gradually changing wind is set to 6 m / s, the maximum value of the random wind is set to 2.5 m / s, and the minimum value of the random wind is set to 0 m / s in the model.

[0086] Figure 9 is the basic wind speed curve graph, and the basic wind speed is 3 m / s. Figure 10 is the typical gust wind speed curve graph. The gust acts from 0.025 s to 0.08 s, and the maximum wind speed is 6 m / s. Figure 11 is the gradually changing wind speed curve graph. It acts from 0.04 s to 0.06 s and maintains for 0.02 s, and the maximum wind speed is 6 m / s. Figure 12 is the random wind speed curve graph. Considering that the wind turbine will change with the wind direction, the minimum wind speed is 0 m / s and the maximum wind speed is 2.5 m / s. Figure 13 is the superposition curve graph of the above four wind speeds.

[0087] From Figure 14 and Figure 15 it can be seen that the current collection effect of the air collection device adopting this embodiment is remarkable.

[0088] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A wind power generation system, characterized in that: include: A current collecting device, a power generation device and a storage device, wherein the current collecting device includes a current collecting body, the current collecting body is provided with a first wind collecting structure and a second wind collecting structure, the first wind collecting structure and the second wind collecting structure are used to collect airflows in different directions, the power generation device includes a vertical axis fan, the vertical axis fan is located in the current collecting body, the vertical axis fan is used to convert wind energy entering the current collecting body from the first wind collecting structure and the second wind collecting structure into electrical energy, the storage device is electrically connected to the power generation device, and the storage device is used to transport and store the electrical energy generated by the power generation device.

2. The wind power generation system according to claim 1, characterized in that: The current collecting body includes a top plate, a bottom plate, a first drainage side wall, a second drainage side wall, a third drainage side wall and a fourth drainage side wall; the upper end of the first drainage side wall and the upper end of the second drainage side wall are both connected to the top plate, the lower end of the first drainage side wall and the lower end of the second drainage side wall are both connected to the bottom plate, and the first drainage side wall and the second drainage side wall form the first wind collecting structure; the upper end of the third drainage side wall and the upper end of the fourth drainage side wall are both connected to the top plate, and the lower end of the third drainage side wall and the lower end of the fourth drainage side wall are both connected to the bottom plate , the third guide side wall and the fourth guide side wall form the second wind collecting structure; the first guide side wall, the second guide side wall, the top plate and the bottom plate form the first wind collecting channel of the first wind collecting structure, and the outer end of the first wind collecting structure is provided with a first wind collecting port, and the first wind collecting port is connected to the first wind collecting channel; the third guide side wall, the fourth guide side wall, the top plate and the bottom plate form the second wind collecting channel of the second wind collecting structure, the outer end of the second wind collecting structure is provided with a second wind collecting port, and the second wind collecting port is connected to the second wind collecting channel.

3. The wind power generation system according to claim 2, characterized in that: The first drainage side wall protrudes in a direction away from the second drainage side wall, the second drainage side wall protrudes in a direction away from the first drainage side wall, the length of the first drainage side wall is greater than the length of the second drainage side wall, and the distance between the first drainage side wall and the second drainage side wall gradually decreases from the first air collecting port to the direction away from the first air collecting port; the third drainage side wall protrudes in a direction away from the fourth drainage side wall, the fourth drainage side wall protrudes in a direction away from the third drainage side wall, the length of the third drainage side wall is greater than the length of the fourth drainage side wall, and the distance between the third drainage side wall and the fourth drainage side wall gradually decreases from the second air collecting port to the direction away from the second air collecting port.

4. The wind power generation system according to claim 2, characterized in that: The current collecting body also includes a first connecting side wall and a second connecting side wall, the upper end of the first connecting side wall and the upper end of the second connecting side wall are both connected to the top plate, the lower end of the first connecting side wall and the lower end of the second connecting side wall are both connected to the bottom plate, one side of the first connecting side wall and one side of the second connecting side wall are both connected to the first wind collecting structure, the other side of the first connecting side wall and the other side of the second connecting side wall are both connected to the second wind collecting structure, and the first connecting side wall, the second connecting side wall, the top plate and the bottom plate form a space for setting the vertical axis fan.

5. The wind power generation system according to claim 2, characterized in that: The first wind collecting structure includes two first wind collecting outlets, and the first wind collecting outlets are located at the outer end of the first wind collecting structure; the second wind collecting structure includes two second wind collecting outlets, and the second wind collecting outlets are located at the outer end of the second wind collecting structure; the two first air collecting outlets are both facing the lane on one side, and the two second air collecting outlets are both facing the lane on the other side; the first air collecting outlet and the second air collecting outlet are arranged in parallel.

6. The wind power generation system according to claim 5, characterized in that: The first wind collecting structure and the second wind collecting structure are symmetrically arranged along a first symmetry axis, the two first wind collecting outlets are symmetrically arranged along a second symmetry axis, the two second wind collecting outlets are symmetrically arranged along the second symmetry axis, and the first symmetry axis and the second symmetry axis are located in the same plane and are perpendicular.

7. The wind power generation system according to claim 1, characterized in that: There are multiple current collecting devices and multiple power generation devices. The current collecting devices are arranged in the central dividing strip. The multiple current collecting devices are evenly distributed along the length direction of the central dividing strip. The current collecting devices and the power generation devices correspond one to one.

8. The wind power generation system according to claim 1, characterized in that: The storage device includes an energy storage inverter and a battery. The energy storage inverter is connected to the battery. The energy storage inverter is used to control the charging and discharging process of the battery and perform AC / DC conversion. The battery is connected to the power generation device and is used to store electrical energy.

9. The wind power generation system according to claim 8, characterized in that: The power generation device also includes a control system, which includes a frequency converter, an inverter and a grid-connected controller. The frequency converter and the inverter are both connected to the vertical axis fan. The frequency converter is used to control the rotation speed and output power of the vertical axis fan. The inverter is used to convert the alternating current generated by the vertical axis fan into direct current or convert direct current into alternating current. The power grid and the battery are both connected to the grid-connected controller. The grid-connected controller is used to monitor the parameters of the power grid and adjust the charge and discharge status of the battery.

10. The wind power generation system according to claim 8, characterized in that: It also includes an intelligent management and control platform, which includes a video monitoring workstation, an operation workstation, an engineer station, a coordination controller and an EMS system. The video monitoring workstation includes a camera, which is used to monitor and record the vertical axis wind turbine. The operation workstation is used for staff to perform daily operation instructions and scheduling work on the wind power generation system. The engineer station is responsible for the configuration, configuration, supervision, control and maintenance of the wind power generation system. The video monitoring workstation, the operation workstation and the engineer station are all connected to the coordination controller, which is used to integrate and coordinate the work of the video monitoring workstation, the operation workstation and the engineer station. The EMS system is respectively connected to the power generation device and the storage device.

Images