Agricultural, solar and wind complementary system

Abstract

The invention provides a agriculture, light and wind complementary system. The agriculture, light and wind complementary system comprises a wind-light same-cable power generation string which is formed by connecting a plurality of wind driven generators and a plurality of photovoltaic cell assemblies in series and shares the same group of upper suspension cables and lower suspension cables. The photovoltaic cell assembly has a certain inclination angle and is used for guiding air flow to the wind driven generator. The wind-solar co-cable power generation strings are suspended above the ground surface such as farmland at intervals. The system does not occupy farmland and other land resources, does not interfere with agricultural machinery operation and other normal production, can relieve the contradiction of wind power land shortage, and can promote the development of agriculture, forestry and animal husbandry and clean energy.

Description

Technical Field

[0001] The present application belongs to the field of agricultural photovoltaic and wind power complementary technology, and specifically relates to a complementary system of agricultural production, photovoltaic power generation, wind power generation, etc. Background Art

[0002] The applicant's "Photovoltaic power generation method and photovoltaic power generation cable at high altitude on cultivated land (CN117792235B)" authorizes a method and photovoltaic power generation cable for photovoltaic power generation at high altitude on cultivated land. The method lays photovoltaic cell components on a load-bearing cable with high tensile strength to make a photovoltaic power generation cable (also a photovoltaic cell string), and erects the photovoltaic power generation cable in the air through a towering support, which can not only absorb the surplus solar energy in the sky for power generation, but also realize water transport and irrigation, and promote the complementary development of agricultural production and photovoltaic power generation. The method has a large span, few pile foundations, and little impact on agricultural machinery operations. It overcomes the problems of large wind resistance, large power generation fluctuations, difficult high-altitude erection, high installation costs, difficult cleaning and maintenance, short service life, and insufficient and effective exploitation of surplus solar energy resources above cultivated land on the flexible bracket of the existing cable structure such as "A rocky desertification control system for a large-span flexible bracket photovoltaic power station (CN219812768U)". Its photovoltaic power generation cable is figuratively called a photovoltaic line in the market. Photovoltaic lines break through the limitation that traditional photovoltaic cell components need to occupy a large area of ​​land, and achieve the invention purpose of photovoltaics without occupying land. As a clean energy technology, the cost of photovoltaic power generation has dropped significantly in recent years. It is reported that the cost of some photovoltaic power stations has dropped to RMB 0.10 per kilowatt-hour over the entire life cycle. Although the cost of photovoltaic power generation has been greatly reduced, because there is no sunlight at night and on rainy days, it is necessary to increase energy storage investment, resulting in high energy storage costs, and has become the main obstacle to large-scale replacement of traditional thermal power.

[0003] Hefei University of Technology proposed "A wind power tree system (CN209654170U)". It arranges multiple miniature "wind turbines" in a tree structure. Since each wind turbine is small, the blades can rotate in a breeze to generate electricity. On November 15, 2018, the Inner Mongolia Power Machinery Research Institute proposed "A Breeze Power Generation System (CN109340051A)", which is a tree-shaped breeze power generation system, including a power generation structure, an electrical control system, a battery, several axially rotatable wind wheels and a magnetic levitation wind turbine; it only needs a breeze to drive power generation, and its power generation efficiency is much higher than that of traditional wind turbines, which effectively solves the problems existing in the above-mentioned traditional wind turbines and existing breeze power generation equipment.

[0004] With the continuous development of wind power technology, larger rotor diameters and taller towers have become the main trends in the development of wind power. The tower height of megawatt-class wind turbines is generally more than tens of meters, or even more than one hundred meters. As the height increases, the manufacturing cost of the tower increases significantly. However, the initial investment of this megawatt-class wind turbine is very high, easily reaching tens of millions, and the site selection requirements are high. They are generally installed on the top of a mountain with strong winds, and will not be installed in low-lying areas and valleys with weak winds. On August 10, 2018, China Information Network published an article titled "36% of the world's icebergs will melt, and wind power will become the savior." The article shows the application scenarios of the small vertical axis wind turbine group that the NPC team has designated to be promoted around the world (see attached) Fig.13 ).

[0005] In summary, the vigorous development of wind power and photovoltaic power will require the occupation of large areas of land resources. Due to the nature of cultivated land, the current agricultural land does not allow large-scale and high-density installation of wind turbines and photovoltaic cell modules. Summary of the invention

[0006] The purpose of this application is to provide a complementary system of agriculture, photovoltaics and wind power, integrating photovoltaic power generation and wind power generation on the same flexible bracket, in order to improve the utilization efficiency of land resources such as farmland / forest land / pasture land, and promote the development of renewable energy; in order to rely on photovoltaic power generation on sunny days without wind, and rely on wind power generation at night and on cloudy days when there is no sunshine, and rely on wind and photovoltaic complementarity to reduce energy storage investment and reduce the cost per kilowatt-hour.

[0007] In order to achieve the above-mentioned invention objectives, the present application provides a complementary system of agriculture, photovoltaics and wind power as follows.

[0008] The present application provides an agricultural photovoltaic wind complementary system, characterized in that it includes: ① A wind-solar cable power generation string composed of n vertical axis wind turbines and (multiple) photovoltaic cell modules connected in series, wherein the n vertical axis wind turbines and (multiple) photovoltaic cell modules in the wind-solar cable power generation string share the same set of upper suspension cables (i.e. load-bearing cables) and lower suspension cables (i.e. stabilizing cables) and other suspension cables; wherein the photovoltaic cell modules are installed at a higher position than the wind turbines, and the photovoltaic cell modules preferably have a certain inclination angle to guide the wind flow to the wind turbines; the installation position of the wind turbines is not higher than the photovoltaic cell modules, so as to prevent their shadows from falling on the photovoltaic cell modules and affecting the normal power generation of the photovoltaic cell modules, and to avoid causing hot spot effects; wherein n≥3 or 5 or 10 or 25 or 50 or 100; wherein the wind turbines are preferably light wind turbines with a single weight of ≤200kg or 100kg or 50kg or 30kg or 15kg, and the density of wind turbines is ≥20 or 30 units / 100m; ② A flexible support with a cable structure consisting of multiple groups (commonly known as multiple pairs) of high-rise supports and multiple cables, where the height of the cables (from the lowest point of the ground) is H ≥ 2m or 4m or 8m or 15m, and the span of the cables is L ≥ 10m or 20m or 50m or 80m or 150m or 500m; ③ (x) wind-solar strings suspended on a flexible bracket; x (preferably) ≥ 2 strings / mu, or 3 strings / mu, or 5 strings / mu, or 10 strings / mu, or 20 strings / mu, or 50 strings / mu; in this way, farmland can be cultivated as usual and crops can grow as usual; preferably, the width of the wind-solar string is D, and the spacing of the wind-solar string is K, D / K≤0.01 or 0.02 or 0.03 or 0.05 or 0.10 or 0.20 or 0.30; to ensure that the shadow of the wind-solar string can quickly pass over the same crop as the sun moves, to avoid the same crop from staying in the shadow of the wind-solar string for a long time, which reduces photosynthesis and leads to crop yield reduction; ④ Crops or plants that grow normally on the ground.

[0009] It should be noted that it is best to use a group of light wind turbines lined up in a string and suspended in the air, rather than using a single larger wind turbine suspended in the air. The purpose is to increase the span, increase the height, increase the windward area, facilitate construction and installation, avoid interfering with agricultural machinery operations, maximize the use of wind energy resources above the land, and avoid the loss of wind energy from limited land resources.

[0010] Preferably, the complementary system of agriculture, photovoltaic and wind power is characterized in that: the upper end of the vertical axis is fixed to the upper suspension cable (i.e. the load-bearing cable), and the lower end of the vertical axis is fixed to the lower suspension cable (i.e. the stabilizing cable); or, a lifting ring is provided on the vertical axis, and a horizontal-axis wind turbine is installed in the lifting ring. In other words, the wind turbine adopts a horizontal-axis wind turbine, and the horizontal-axis wind turbine is installed in a lifting ring with a vertical axis, and is fixed to the suspension cable via the vertical axis on the lifting ring, the upper end of the vertical axis is fixed to the upper suspension cable, and the lower end of the vertical axis is fixed to the lower suspension cable.

[0011] Preferably, the agricultural-solar-wind complementary system is characterized in that the spacing K between two adjacent wind-solar same-cable power generation strings is ≥ 2m or 3m or 5m or 10m or 20m or 50m.

[0012] Preferably, the agricultural, solar and wind complementary system is characterized in that a plurality of wind turbines in the same wind-solar and wind-cable power generation string are connected in parallel or / and in series through rectifiers and wires.

[0013] Preferably, the agricultural, solar, and wind complementary system is characterized in that the rectifier outputs direct current, the wires connect the multiple wind turbines in the wind, solar, and cable power generation string in parallel, and the wires are bound to the suspension cables and led to the towering supports.

[0014] Preferably, the agricultural, photovoltaic and wind complementary system is characterized in that: the wind and photovoltaic power generation strings are suspended in the sky above the valley between two mountains, and (according to local conditions) the mountain peaks are used as high supports. In other words, the wind and photovoltaic power generation strings are suspended above the valley. Studies have shown that because the mountains on both sides of the valley have a wind-guiding effect, the wind speed above the valley is faster than the top of the mountain, the wind force is stronger than the top of the mountain, and the wind energy is greater than the top of the mountain, making it more suitable as a place for wind energy collection.

[0015] Preferably, the agricultural, solar and wind complementary system is characterized in that the solar and wind power generation strings are suspended in the air between two adjacent large wind power generation towers, and the large wind power generation towers are also used as tall supports.

[0016] Preferably, the agricultural, solar, and wind complementary system is characterized in that the wind and solar power generation strings are suspended in the air between two adjacent electric poles (including electric towers), and the electric poles are also used as tall supports.

[0017] Preferably, the agricultural, solar and wind complementary system is characterized by: a certain distance k is left between two adjacent wind and solar power generation strings, where k≥1m or 2m or 3m or 5m or 10m or 20m or 50m.

[0018] Preferably, the agricultural-solar-wind complementary system is characterized by: n vertical axis generators and multiple photovoltaic cell modules share the same set of upper suspension cables (i.e. load-bearing cables) and lower suspension cables (i.e. stabilizing cables); The photovoltaic cell assembly is installed at a position higher than the wind turbine, and the photovoltaic cell assembly has a certain inclination angle to direct the wind flow toward the wind turbine; The wind turbine is a light wind turbine with a single weight of ≤200kg or 100kg or 50kg or 30kg or 15kg; The density of wind turbines is ≥ 20 or 30 per 100 meters; The width dimension of the wind-solar power generation string is D, and the spacing is K, D / K≤0.01 or 0.02 or 0.03 or 0.05 or 0.10 or 0.20 or 0.30, so as to ensure that the shadow of the wind-solar power generation string can quickly pass through the same crop as the sun moves, so as to avoid the same crop from staying in the shadow of the wind-solar power generation string for a long time, thereby reducing photosynthesis and causing crop yield reduction.

[0019] The surface described in this application includes agricultural land, forestry land, pastoral land, water surface, etc.

[0020] Compared with the prior art, the present application has the following beneficial technical effects.

[0021] First, although it is a dense wind-solar-cable power generation string, it does not occupy land resources such as farmland, forest land, pasture land, and does not hinder normal agricultural production such as agricultural machinery operations. The wind-solar-cable power generation string in this application, like high-voltage power lines, basically does not occupy arable land (pile foundations can be set on ridges, ditches, and roadsides according to local conditions), the suspension cable has a large span, high height, small shadow, and does not affect crop growth and yield. Fig.13 If the wind turbines are used in the application scenarios, it will occupy a large amount of land resources such as farmland, hindering agricultural production. The relevant departments do not allow the dense installation of wind turbines in farmland.

[0022] Second, one land for two uses, wind, light and agriculture complement each other. The most beneficial technical effect of this application is that it cleverly develops and uses the surplus wind energy resources above the land, which can improve the single agricultural, forestry and animal husbandry use of the land, increase the value of the land, alleviate the contradiction of tight land use for wind power, and promote the innovative development of complementary agriculture, forestry and animal husbandry with clean energy. However, the current wind turbines such as wind power trees and the current flexible bracket photovoltaic power generation system are not allowed to be installed in farmland. Most of the wind resources passing over the farmland will be lost in vain and not fully exploited.

[0023] Third, electricity can be generated above the valley, opening up new wind power resources. Currently, large wind turbines are generally installed on mountain tops (because the wind is strong on the mountain tops), and will not be installed in low-lying valleys (because the wind is weak or even non-existent in the valleys). However, the agricultural, solar, and wind complementary system of this application can suspend the wind and solar power generation string in the valley between two mountains, thereby exploring new wind power sites with greater wind energy.

[0024] Fourth, wind and photovoltaic use the same cables and one frame for dual purposes, wind power and photovoltaic power complement each other. A set of flexible brackets can be shared by wind power generation system and photovoltaic power generation system, and photovoltaic cell components and wind turbines share the same set of load-bearing cables and stabilizing cables, saving material and construction costs. When night falls, wind power can continue to supply power, thus avoiding the shortage of power supply at night for a pure photovoltaic power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a wind turbine string consisting of many vertical axis wind turbines installed in a farmland.

[0026] Figure 2 This is a schematic diagram of the structure of a wind-solar cable power generation string formed by connecting a plurality of vertical axis wind turbines and a plurality of photovoltaic cell modules in series in the present application (Example 1).

[0027] Figure 3 for Figure 2Schematic diagram of an application scenario in which multiple wind-solar strings are installed in a farmland at a certain distance K.

[0028] Figure 4 This is a schematic structural diagram of a (light vertical axis) wind turbine (including a wind wheel) in this application.

[0029] Figure 5 This is a schematic structural diagram of another (lightweight vertical axis) wind turbine (including a wind wheel) in this application.

[0030] Figure 6 This is a schematic structural diagram of another (light vertical axis) wind turbine (including a wind wheel) in the present application.

[0031] Figure 7 This is a schematic structural diagram of a (horizontal axis) wind turbine (including a wind wheel) with an additional vertical axis in the present application (Example 2).

[0032] Figure 8 for Figure 7 Schematic diagram of the application of a (horizontal axis) wind turbine.

[0033] Fig. 9 This is a schematic diagram of the application of the agricultural, solar and wind complementary system above the valley in this application (Example 3).

[0034] Fig.10 This is a schematic diagram of the application (Example 4) of the agricultural, solar and wind complementary system combined with a large wind turbine.

[0035] Fig.11 This is a schematic diagram of the application of the agricultural-solar-wind complementary system (Example 5) combined with existing power transmission poles.

[0036] Fig.12 for Figure 1 Schematic diagram of the parallel circuit of n wind turbines.

[0037] Fig.13 This is a picture of an application scenario of a current vertical axis wind turbine group.

[0038] Fig.14 This is a schematic diagram of the bell mouth formed by the inclined photovoltaic cell assembly and the wind guide plate in the present application (Example 1).

[0039] Explanation of the accompanying numbers: 1-vertical axis, 2-wind turbine (including wind rotor), 3-lower suspension cable, 4-upper suspension cable, 5-stayed cable, 6-high support, 7-crops, 8-arable land, 9-large agricultural machinery, 10-lifting ring, 11-tail rudder, 12-horizontal axis wind turbine, 13-rectifier, 14-inverter, 15-wind-solar cable power generation string, 16-(current) large wind turbine, 17-photovoltaic cell module, 18-wind guide plate, 19-wind. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by this application easy to understand, this application is further explained below in conjunction with specific implementation methods.

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

[0042] It should be noted that, unless otherwise specified or limited, the terms "installation" and "series connection" should be understood in a broad sense. "Connected" can be electrically connected or directly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Embodiment 1.

[0044] like Figure 1 As shown, first, an upper suspension cable 4 and a lower suspension cable 3 are set up in the north-south direction above a piece of cultivated land 8 (such as a wheat field, a vegetable field, a corn field, or an orchard) at a height of 3-50 meters from the ground. The upper suspension cable 4 and the lower suspension cable 3 are 2.6 meters apart.

[0045] The first step is to purchase n (for example, 50) small wind turbines 2 (including wind rotors) with vertical axes 1, for example, vertical axis wind turbines 2 with a diameter of 1.6m, a power of 1kw, and a weight of 50kg. Then purchase a batch of high tensile strength steel cables greater than 1200 MPa as upper suspension cables 4 (as load-bearing cables), for example, φ17.2×3 galvanized prestressed steel cables as load-bearing cables. Then purchase a batch of 1200 MPa high tensile strength steel cables as lower suspension cables 3 (as stabilizing cables), for example, φ12.5×3 galvanized prestressed steel cables as stabilizing cables.

[0046] In the second step, the lower suspension cable 3 and the upper suspension cable 4 are separated by 2.6m in height, and are suspended above the cultivated land 8 through multiple pairs of high-rise supports 6 such as support columns or cable towers (similar to electric towers / poles) higher than 20 meters, just like erecting high-voltage transmission lines. The height H of the lower suspension cable 3 from the ground can be set to about 15 meters, the span L of its single span can be set to 120 meters, and the distance between the horizontal projections of the lower suspension cable 3 and the upper suspension cable 4 (on the cultivated land 8) is preferably set to more than 10 meters. For example, H can be set to ≥ 20m, 30m or 50m. In short, the height H should be high enough to ensure that the top of the crop 7 does not touch the lower suspension cable 3. L can also be set to ≥ 20m, 50m, 100m or 500m. In short, the span L should be large enough to reduce the number of high-rise supports 6, reduce the area occupied by the pile foundation, and avoid serious obstruction of the operation of large agricultural machinery 9. It is best to make the spacing K ≥ 5m or 10m. In short, the thickness and shadow width of the suspension cables should be appropriately reduced to ensure the minimum light needs for crop growth and avoid reduced production due to insufficient photosynthesis.

[0047] The third step is to add necessary facilities such as inclined cables and wind-resistant inclined cables according to the convention in order to stabilize the towering support 6.

[0048] Preferably, if Figure 2 As shown, a wind-solar simultaneous power generation string 15 composed of a plurality of photovoltaic cell assemblies 17 is laid on top of the wind power string, wherein n≥3 or 5 or 10 or 25 or 50 or 100; the wind turbine 2 is preferably a light wind turbine 2 with a single weight ≤100kg or 50kg or 30kg or 15kg, and a density of wind turbines 2 ≥20 or 30 units / 100 meters; wherein the photovoltaic cell assembly 17 is higher than the wind turbine 2, and the photovoltaic cell assembly 17 preferably has a certain inclination angle (preferably forming a trumpet with the wind guide plate 18) to converge the wind flow toward the direction of the wind turbine 2 (such as Fig.14 The wind turbine 2 is not higher than the photovoltaic cell assembly 17 to prevent its shadow from falling on the photovoltaic cell assembly 17 and affecting the normal power generation of the photovoltaic cell assembly 17.

[0049] It is also preferred to improve land utilization efficiency, maximize the development of wind energy, and avoid passing wind energy slipping away in vain, such as Figure 3 As shown, a wind-solar-cable power generation string 15 can be installed at a certain distance K above the same piece of hundreds of acres of cultivated land 8. For example, 2 strings, 3 strings, 5 strings, 10 strings, 20 strings, or 50 strings can be installed per acre. It is best to ensure that D / K ≤ 0.01 or 0.02 or 0.03 or 0.05 or 0.10 or 0.20 or 0.30 or 3; so that the shadow of the wind-solar-cable power generation string 15 can quickly pass through the same crop 7 as the sun moves, so as to avoid the same crop 7 staying in the shadow of the wind-solar-cable power generation string 15 for a long time, thereby reducing photosynthesis and causing crop 7 yield.

[0050] The fourth step is to install 50 small wind turbines 2 with vertical axes 1 in a row between the upper suspension cable 4 and the lower suspension cable 3 to form a wind power string.

[0051] More preferably, in order to reduce the weight of the wind turbine 2, the span L is increased to reduce the impact on the operation of agricultural machinery, such as Figure 4 , Figure 5 , Figure 6 As shown, it is best to use a lightweight wind turbine 2 with a vertical axis 1. It is best to use the patent number CN307243653S, such as Figure 6 The tulip-shaped wind turbine 2 shown. With the promotion and application of the technology of the present application, with continuous research and development and product upgrades, it can be foreseen that in the near future, the wind turbine 2 will be configured to be manufactured more lightly, more suitable for being made into a wind-solar cable power generation string 15, and more suitable for being suspended in the air.

[0052] More preferably, in order to output the unstable AC power generated by each wind turbine 2 in a wind-solar cable power generation string 15, it is best to Fig.12 As shown, each wind turbine 2 is equipped with a rectifier 13 for converting AC power into pulsed DC power, which is then outputted via two parallel wires.

[0053] In this way, the crops 7 located in the cultivated land 8 can be cultivated or grown as usual.

[0054] Embodiment 2.

[0055] In order to use a horizontal axis wind turbine 2 with higher power generation efficiency in this application, Figure 7 , Figure 8 As shown, the existing horizontal axis wind turbine 2 with a tail rudder 11 is modified by adding a lifting ring 10 and its vertical axis 1, and the horizontal axis wind turbine 2 with the tail rudder 11 is installed in the lifting ring 10, and installed between the upper suspension cable 4 and the lower suspension cable 3 through the lifting ring 10 to form (one) wind-solar same-cable power generation string 15.

[0056] Embodiment three.

[0057] like Fig. 9 As shown, referring to the above two steps, the wind-solar-cable power generation string 15 is suspended in the air between two mountains. Because the current megawatt-level wind turbines 2 have high site selection requirements, they are generally installed on the top of the mountain with strong winds, and will not be installed in low-lying places and valleys with weak winds. In other words, the wind-solar-cable power generation string 15 can be suspended above the valley to turn the valley and other low-lying places into new wind power sites where the wind-solar-cable power generation string 15 can be installed.

[0058] Embodiment 4.

[0059] like Fig.10 As shown, referring to the above three steps, the wind-solar cable power generation string 15 is suspended in the air between two (current) large wind turbines 16. In this way, the towering support 6 can be shared, and new wind power resources can be mined at a very low cost.

[0060] Embodiment five.

[0061] like Fig.11 As shown, referring to the above four steps, the wind-solar cable power generation string 15 is suspended in the air between two electric poles (including electric towers). In this way, the towering support 6 can be shared, and new wind power resources can be mined at a very low cost.

[0062] What is disclosed above is only a preferred embodiment of the present application. The drawings are merely schematic structural diagrams and are not drawn according to the actual size ratio. They cannot be used to limit the scope of rights of the present application. Equivalent changes made based on the claims of the present application still fall within the scope covered by the present application.

Claims

1. A system of complementary agriculture, photovoltaic and wind power, characterized in that it include: ① A wind-solar power generation string consisting of n vertical axis wind turbines and multiple photovoltaic cell modules connected in series, where n ≥ 3 or 5 or 10 or 25 or 50 or 100; ② A flexible support with a cable structure consisting of multiple groups of high supports and multiple cables, where the cable height H ≥ 2m or 4m or 8m or 15m, and the cable span L ≥ 10m or 20m or 50m or 80m or 150m or 500m; ③ Wind-solar cable-generated power generation strings suspended on flexible brackets; ④ Crops or plants that grow normally on the ground.

2. The agricultural-solar-wind complementary system according to claim 1 is characterized by: The upper end of the vertical axis is fixed on the upper suspension cable, and the lower end of the vertical axis is fixed on the lower suspension cable; or, a lifting ring is provided on the vertical axis, and a horizontal axis wind turbine is installed in the lifting ring.

3. The agricultural-solar-wind complementary system according to claim 2 is characterized by: The distance between two adjacent wind-solar power generation strings is K≥1m or 2m or 3m or 5m or 10m or 20m or 50m.

4. The agricultural-solar-wind complementary system according to claim 1 is characterized by: The wind and solar power generation strings are suspended high in the valley between two mountains, with the mountain peaks also serving as tall supports.

5. The agricultural-solar-wind complementary system according to claim 1 is characterized by: The wind-solar cable power generation string is suspended in the air between two adjacent large wind power towers, and the large wind power towers also serve as tall supports.

6. The agricultural-solar-wind complementary system according to claim 1 is characterized by: The wind and solar power generation strings are suspended in the air between two adjacent electric poles, and the electric poles also serve as tall supports.

7. The agricultural-solar-wind complementary system according to claim 1, 2 or 3, characterized in that: n vertical axis generators and multiple photovoltaic cell modules share the same set of upper and lower suspension cables; The photovoltaic cell assembly is installed at a position higher than the wind turbine, and the photovoltaic cell assembly has a certain inclination angle to direct the wind flow toward the wind turbine; The wind turbine is a light wind turbine with a single weight of ≤200kg or 100kg or 50kg or 30kg or 15kg; The density of wind turbines is ≥ 20 or 30 per 100 meters; The width dimension of the wind-solar power generation string is D, and the spacing is K, D / K≤0.01 or 0.02 or 0.03 or 0.05 or 0.10 or 0.20 or 0.30, so as to ensure that the shadow of the wind-solar power generation string can quickly pass through the same crop as the sun moves, so as to avoid the same crop from staying in the shadow of the wind-solar power generation string for a long time, thereby reducing photosynthesis and causing crop yield reduction.

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