Dynamic wind-resistant flexible photovoltaic power generation mount system

Abstract

A dynamic wind-resistant flexible photovoltaic power generation mount system, in which multiple photovoltaic panels are mounted astride a same load-bearing cable and connected in series to form a flat-plate-type photovoltaic power generation suspension cable. Each photovoltaic panel can sway with the wind around the load-bearing cable. The present application overcomes the defects of existing static wind-resistant technologies, pioneers a new dynamic wind-resistant approach, reduces wind resistance, and achieves an exceptionally strong wind-resistant effect. The present application allows for an increased span, reduces the number of pile foundations, and minimally interferes with large-scale agricultural machinery operation. The movement speed of shadows is rapid, so that crop photosynthesis is not affected, and instead, crop growth is stimulated and agricultural yield and income are increased.

Description

Dynamic wind-resistant flexible photovoltaic support power generation system

[0001] This application claims priority from the following Chinese patent applications, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application belongs to the fields of wind-resistant photovoltaic technologies such as agricultural-photovoltaic complementarity, fishery-photovoltaic complementarity, forest-photovoltaic complementarity, and pastoral-photovoltaic complementarity, and specifically relates to a dynamic wind-resistant flexible photovoltaic bracket power generation system. Background Art

[0003] 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. It lays a layer of photovoltaic cells on a load-bearing cable with high tensile strength to encapsulate and produce a (cylindrical) photovoltaic power generation cable, and then erects the photovoltaic power generation cable above the cultivated land through a support. On the one hand, it absorbs the surplus solar energy in the sky to generate electricity, and on the other hand, it can also transport water for irrigation, thus realizing the complementary development of agricultural production and photovoltaic power generation - agricultural and photovoltaic complementarity. Its large span and few pile foundations can avoid serious interference with agricultural machinery operations. It overcomes many technical defects of existing agricultural and photovoltaic complementary technologies, such as large power generation fluctuations, difficulty in high-altitude erection, high installation costs, difficulty in cleaning and maintenance, short service life, and insufficient and effective exploitation of surplus solar energy resources above cultivated land.

[0004] However, when using flexible thin-film photovoltaic cells to produce cylindrical photovoltaic power cables, it was found that flexible thin-film photovoltaic cells have not yet formed economies of scale, and their market price (about 1.65 yuan / watt) is difficult to drop to the price level of single-crystal silicon flat photovoltaic (battery) panels (about 0.8 yuan / watt) in the short term. It is expected that the cost of photovoltaic power cables will remain high in the short term.

[0005] As the patent applicant, the Guiyang Survey and Design Institute Geotechnical Engineering Co., Ltd. of the China Hydropower Consulting Group has proposed four patents: "A Desertification Control System for a Large-Span Flexible Support Photovoltaic Power Station (CN219812768U)", "A Large-Span Hyperbolic Suspension Flexible Photovoltaic Support (CN219834036U)", "A Large-Span Prestressed Double-Layer Cable Net Structure Photovoltaic Support and Installation Method (CN116780986A)", and "A Large-Span Flexible Cable Net Structure Photovoltaic Support (CN116667755 A)". These four patents, along with many other existing technologies, share a common technical feature: the use of two load-bearing cables and one stabilizing cable to stabilize the photovoltaic panels, with static photovoltaic panels used to resist wind. In short, they employ a static wind-resistant technology approach.

[0006] After investigating the implementation of the aforementioned patented technologies, including flexible photovoltaic brackets employing static wind-resistant technology, the applicant discovered a common technical flaw: as shown in Figure 10, flexible photovoltaic bracket (power generation) systems employing "two load-bearing cables" to secure photovoltaic panels experience a cumulative force from the torque exerted by strong winds on each panel at the same time. The violent swaying of one panel inevitably causes the other panels to sway in tandem through the "two load-bearing cables," resulting in extremely high maintenance costs. A four-month-old flexible photovoltaic bracket fishery-photovoltaic hybrid demonstration project in Sanjiang Town, Meilan District, Haikou City, Hainan Province, constructed using the existing technology shown in Figure 10, with an installed capacity of 100 megawatts and covering an area of ​​1,663 mu, was completely destroyed by Typhoon Makar (Typhoon No. 11 of 2024), resulting in economic losses exceeding 400 million RMB. This demonstrates that the current static wind-resistant technology, which employs static photovoltaic panels to resist strong winds, faces severe challenges from super typhoons. Summary of the Invention

[0007] The purpose of this application is to provide a dynamic wind-resistant flexible photovoltaic bracket power generation system, so that the existing cheap planar photovoltaic components such as monocrystalline silicon photovoltaic panels can be used to build another flexible photovoltaic bracket power generation system to achieve the technical effect of resisting super typhoons and open up a new dynamic wind-resistant technology route.

[0008] In order to achieve the above-mentioned purpose of the invention, the present application proposes a dynamic wind-resistant flexible photovoltaic bracket power generation system that is different from the current static wind-resistant technical route.

[0009] The present application provides a dynamic wind-resistant flexible photovoltaic bracket power generation system, comprising a support, a load-bearing cable and a photovoltaic (battery) panel.

[0010] ① Multiple photovoltaic panels are mounted on the same load-bearing cable through a specific connection device, so that each photovoltaic panel can swing relative to the load-bearing cable in the event of strong winds, thereby buffering the wind force and enhancing the system's wind resistance. For example, multiple photovoltaic panels are mounted on the same load-bearing cable, so that they can swing around the load-bearing cable in the strong wind.

[0011] ② In the absence of wind or with a light breeze, the photovoltaic panels remain relatively still facing the sky to receive sunlight and generate electricity;

[0012] ③ Each photovoltaic panel is equipped with at least one buffer mechanism, including but not limited to a spring or lever mechanism, which can effectively reduce the swing amplitude of the photovoltaic panel when encountering strong winds, thereby protecting the photovoltaic panel from excessive stress and automatically helping the photovoltaic panel to return to a relatively static state facing the sky after the strong wind passes; in other words, each photovoltaic panel is connected to a (buffer) spring and / or (buffer) lever, which is used to buffer the swing intensity of the photovoltaic panel (that is, to reduce the swing impact force of the photovoltaic panel) when strong winds hit (at this time the spring is stretched by a large tension or the lever is tightened by a large torque) to buffer the wind force; when the strong wind passes (at this time the spring contracts or the lever relaxes), the photovoltaic panel is reset and (used to resist the wind force below the yield point to) maintain a relatively static state facing the sky;

[0013] ④ Multiple photovoltaic panels on the same load-bearing cable are electrically connected in parallel or / and series to form a complete (flat-plate type) photovoltaic power generation cable, which is suspended in the air between two supports.

[0014] It should be noted that the above-mentioned "buffer mechanism" refers to a design used to reduce or absorb the impact of external forces (such as wind) on photovoltaic panels, protect the structural safety of photovoltaic panels and maintain their power generation.

[0015] It should also be noted that when the tension is low, the spring remains stationary, but when the tension exceeds a certain value, the spring begins to stretch. This specific tension value is usually called the critical tension or yield point of the spring. After adopting the above-mentioned "buffer mechanism", when there is a light breeze, the tension of the photovoltaic panel to swing is less than the yield point of the spring and lever, and cannot pull the spring and lever. Therefore, in a light breeze, the spring and lever can continue to maintain the photovoltaic panel in a relatively static state facing the sky. When strong winds hit, the tension of the photovoltaic panel to swing is greater than the yield point of the spring and lever, which can pull the spring and lever, making it impossible to maintain the photovoltaic panel in a relatively static state facing the sky. The photovoltaic panel will inevitably sway around the load-bearing cables with the strong wind to buffer the wind force.

[0016] Preferably, in the dynamic wind-resistant flexible photovoltaic support power generation system, one end of the spring is connected to the photovoltaic panel or lever, and the other end is connected to (another) stabilizer, such as a stabilizing cable, an adjacent load-bearing cable, a water pipe, a heavy object, the ground, or other immovable object, to limit the swing amplitude of the photovoltaic panel and prevent the photovoltaic panel from circling around the load-bearing cable (due to wind) and thus severing the electrical connection wires. Alternatively, one end of the lever is connected to the photovoltaic panel and the other end is connected to (another) stabilizer, to limit the swing amplitude of the photovoltaic panel and prevent the photovoltaic panel from circling around the load-bearing cable (due to wind) and thus severing the electrical connection wires. The lever should be rigid, such as angle iron or aluminum profile.

[0017] Preferably, the dynamic wind-resistant flexible photovoltaic support power generation system utilizes a non-fixed connection device, including but not limited to a hinge structure, between the photovoltaic panel and the load-bearing cable, so that the photovoltaic panel can swing around the load-bearing cable in response to strong winds, thereby preventing the load-bearing cable from twisting and causing adjacent photovoltaic panels to swing. The "non-fixed connection" mentioned here refers to the photovoltaic panel being able to swing relative to the load-bearing cable within a certain range in response to wind, rather than being completely fixed.

[0018] Preferably, in the dynamic wind-resistant flexible photovoltaic support power generation system, the ratio of the lever length B to the panel width D (B / D) is ≥ 1, 2, 3, 4, 5, or 10, so that an inexpensive spring with a low yield point can be used to maintain the photovoltaic panel in a relatively static position facing the sky. This is because a longer lever length (B) increases the B / D ratio and torque, making it easier to stabilize the photovoltaic panel. The optimal lever length (B) is 1-2 meters.

[0019] Preferably, the yield points of the springs of the dynamic wind-resistant flexible photovoltaic support power generation system are different (i.e., uneven); or the lengths B of the levers are different (i.e., uneven). This can prevent the photovoltaic panels from swinging in the same frequency resonance, avoiding linkage tearing and resonance damage.

[0020] Preferably, in the dynamic wind-resistant flexible photovoltaic bracket power generation system, the load-bearing cable is clamped with a rope protection sleeve (such as a bearing, a pipe, a clamp, etc.), and the photovoltaic panel rides on the rope protection sleeve to protect the load-bearing cable from wear.

[0021] Preferably, the dynamic wind-resistant flexible photovoltaic support power generation system has a ∩-shaped or annular saddle fixed to the back or side of the photovoltaic panel, with the ∩-shaped or annular saddle sitting on the cable guard to form a non-fixed connection device such as a hinge structure. The cable guard is preferably equipped with a retaining member such as a baffle or a retaining pin to prevent the photovoltaic panel from sliding along the load-bearing cable and to prevent adjacent photovoltaic panels from squeezing or colliding with each other.

[0022] Preferably, in the dynamic wind-resistant flexible photovoltaic bracket power generation system, one end of the lever is connected to the photovoltaic panel, the other end is connected to one end of the spring, and the other end of the spring is connected to (other) stabilizer.

[0023] Preferably, in the dynamic wind-resistant flexible photovoltaic bracket power generation system, the height of the photovoltaic power generation cable from the ground is the cable height H, the single span of the photovoltaic power generation cable is the span L, and the horizontal projection spacing of the photovoltaic power generation cable is the shadow distance K; the shading coefficient D / K≤5, and the height ratio K / H≤10.

[0024] Preferably, in the dynamic wind-resistant flexible photovoltaic support power generation system, the photovoltaic panel width D is ≤ 50mm, 100mm, 235mm, 322mm, 415mm, 830mm, or 1288mm. A panel width D of 100mm to 235mm is preferred because panels of this width cast a narrower shadow on the ground, minimizing the time it takes to cast a shadow across the crops, allowing sunlight to be evenly distributed across the crops without affecting normal photosynthesis. Furthermore, the wind-induced swing torque and wind resistance are minimized, allowing for a larger span L.

[0025] Preferably, the cable height H ≥ 1m or 2m or 3m or 5m or 10m or 20m or 30m or 50m or 100m and other set dimensions should make the cable height H high enough to ensure that the top of the highest crop will not touch the photovoltaic power generation cable, preferably H ≥ 5m to ensure that it does not hinder the operation of large agricultural machinery and drones; the span L ≥ 10m or 20m or 50m or 80m or 150m or 500m, and the span L should be large enough to reduce the number of supports, reduce the area occupied by pile foundations, and avoid serious interference with the operation of large agricultural machinery. The best span L ≥ 120m for ultra-large span applications; the shadow distance K ≥ 0.05m or 0.1m or 0.2m or 0.5m or 1m or 2m or 3m or 5m or 10m, and the shadow area of ​​the photovoltaic power generation cable should be appropriately reduced to minimize the light needs for crop growth and avoid yield reduction due to insufficient photosynthesis.

[0026] More preferably, the cable height H is (try to make) greater than the set size, and the shading coefficient D / K is (try to make) ≤ 0.01 or 0.02 or 0.03 or 0.05 or 0.1 or 0.2 or 0.3 or 0.5 or 1 or 2 or 3 or other set coefficient values, so as to ensure that each noon shadow moves a distance of one noon shadow width every 1-20 minutes (preferably every 1-5 minutes); the same shadow stays on the same crop (at the same position) for no more than 30 minutes, to at least ensure the light needs for crop growth and avoid yield reduction due to insufficient photosynthesis; in order to unify the detection standards, the noon shadow is defined here as the shadow cast by the sun on the ground by the photovoltaic power generation cable at noon (i.e., from 11:00 to 13:00); in other words, the noon shadow refers to the shadow cast by the sun on the ground by the photovoltaic power generation cable from 11:00 to 13:00.

[0027] Research shows that when the cable height is ≥ 2m, D is ≤ 0.415m, and the shading coefficient D / K is ≤ 0.25, the sunlight needed by crops is blocked for 3-5 minutes every 20 minutes. Using multiple adjacent photovoltaic cables to repeatedly block, release, re-block, and release the sunlight for the same crop, intermittent sunlight is provided to the crop, stimulating growth and increasing yield. This reduces the amount of sunlight absorbed by the crop by an average of 13-20%. One set of data shows that a reduction of less than 13% (equivalent to a D / K ≤ 0.15) has no effect on crop photosynthesis and yield. Another set of data shows that a reduction of more than 20% (equivalent to a D / K ≥ 0.25) begins to have some impact on crop photosynthesis and yield. Therefore, the golden ratio of rope height H ≥ 2m, D ≤ 0.415m (0.235m is best), D / K ≤ 0.25, and each noon shadow moves a distance of one noon shadow width every 1-20 minutes, which does not hinder crop photosynthesis and has universal use value.

[0028] Research shows that the length of time a shadow remains on a crop is inversely proportional to H and directly proportional to D. For example, in Xiuying District, Haikou City, a 50-meter-high north-south photovoltaic cable moved at a speed of 68 cm / minute at noon on March 4th (11:00 AM). If the cable's height (H) were reduced to 4.6 meters, the shadow's speed would drop to 2.5 cm / minute. If the cable's height (H) were reduced to 1.2 meters, the speed would drop to 0.6 cm / minute. Furthermore, if the cable's height (H) were reduced to 5 meters at noon on March 4th (1:30 PM), the shadow's speed would drop to 1.3 cm / minute. Comparative observations during the same period revealed that the shadow of a 5-meter-high photovoltaic cable running east-west moved southward at a speed of only 0.33 mm / minute. This is far too slow. In practice, wider photovoltaic cables should be avoided in an east-west orientation and preferably installed in a north-south orientation. This suggests that to mitigate the impact of slow shadow movement on crop growth, the cable height (H) of the photovoltaic cable should be increased. Given that a 1-meter cable height (H) results in a prolonged shadow cast on crops, severely impacting their growth, such a low cable height (H) is not recommended. Furthermore, to mitigate the impact of slow shadow movement on crop growth, the cable width (D) should be minimized.

[0029] In summary, during specific implementation, the cable height H should preferably be above 2m, preferably above 4m; the panel width D should preferably be below 0.15m, preferably below 0.1m; the horizontal projection shadow distance K should also preferably be above 0.5m, preferably above 1m; D / K≤0.25, preferably the golden ratio of D / K≤0.15. The current market size of small-sized photovoltaic panels is 1.2m×0.6m, and the shadow it produces is 0.6m wide, which is several times the optimal shadow width of 0.235m in this application. Such a wide shadow will inevitably stay on the same crop for a long time (generally more than 1 hour each time), which will lead to the weakening of the photosynthesis of the crop and a reduction in yield, and will inevitably have a greater ecological impact on the original crops in the cultivated land.

[0030] In practice, the shading coefficient D / K should be selected based on the crop types in the farmland. For crops that require shading nets to regulate light levels, and for forest land where yield is not a priority, such as vegetable crops like lettuce, spinach, cabbage, mustard greens, celery, greens, and grasslands, the shading coefficient D / K can be appropriately increased, the shadow distance K can be reduced, and the board width D can be increased.

[0031] Furthermore, in the dynamic wind-resistant flexible photovoltaic support power generation system, the photovoltaic power generation cables are preferably suspended in a north-south direction, which includes all directions with an angle of less than 39° to the meridian. This can increase the speed of shadow movement, allowing the shadow to quickly move away from the same crop, thereby reducing the impact on crop photosynthesis.

[0032] Preferably, in the dynamic wind-resistant flexible photovoltaic bracket power generation system, the photovoltaic power generation cables are equipped with irrigation pipes (connected to the existing drip irrigation / sprinkler irrigation system), and the photovoltaic power generation cables and irrigation pipes share a load-bearing cable and support. In this way, the technical solution of this application can not only utilize the excess sunlight above the farmland for photovoltaic power generation, but also provide water for irrigation.

[0033] Even more preferably, the dynamic wind-resistant flexible photovoltaic bracket power generation system has a photovoltaic power generation cable equipped with a supplementary light (commonly known as a plant growth light). The photovoltaic power generation cable, the supplementary light, and its power supply wire share a load-bearing cable and support, which is used to supplement light for light-loving crops at night to promote crop growth, thereby achieving a three-in-one agricultural photoelectric complementarity of photovoltaic power generation, nighttime supplementary light, and water supply and irrigation. In this way, the technical solution of this application can not only utilize the excess sunlight above the cultivated land for photovoltaic power generation, but also provide water supply and irrigation, and supplement light for light-loving crops at night to promote crop growth.

[0034] Preferably, the dynamic wind-resistant flexible photovoltaic bracket power generation system is provided with a limiting component on the load-bearing cable or the protective cable sleeve to prevent the photovoltaic panel from sliding along the load-bearing cable to prevent adjacent photovoltaic panels from colliding with each other.

[0035] Preferably, the photovoltaic panels in the dynamic wind-resistant flexible photovoltaic support power generation system are curved photovoltaic panels with a bending radius greater than 0.30m. This is because currently available, relatively inexpensive semi-flexible photovoltaic modules all have a bending radius greater than 0.30m, making them difficult to manufacture into the small-diameter cylindrical photovoltaic cables required in the "High-altitude Photovoltaic Power Generation Method and Photovoltaic Power Generation Cable for Cultivated Land (CN117792235B)." However, these can be used in this application to manufacture curved photovoltaic panels with a bending radius greater than 0.30m.

[0036] Preferably, in the dynamic wind-resistant flexible photovoltaic support power generation system, among the multiple photovoltaic panels on the same load-bearing cable, some photovoltaic panels are larger on the left side of the load-bearing cable, while others are larger on the right side. This allows some photovoltaic panels to swing clockwise and others counterclockwise when a gust of wind blows, thereby causing the stabilizing cable to be simultaneously subjected to multiple pulling forces in different directions, resulting in a zero resultant force on the stabilizing cable, thereby preventing the stabilizing cable from breaking. Alternatively, the photovoltaic panels on the left and right sides of the load-bearing cable have unequal areas.

[0037] Preferably, the dynamic wind-resistant flexible photovoltaic support power generation system includes a force limiter (e.g., a pair of permanent electromagnets) on the photovoltaic panel. During periods of calm, light winds, and low-level typhoons, the force limiter restrains the photovoltaic panel, keeping it stationary and facing the sky. When strong winds strike, the photovoltaic panel releases the force limiter, and the spring provides a buffering tension to mitigate the wind force. The force limiter can be a variety of existing force limiters, including a snap bolt, overload protector, safety pin, and other devices, including electronically controlled force limiters.

[0038] It is also preferred that the dynamic wind-resistant flexible photovoltaic bracket power generation system has a cable height H ≥ 2m, a board width D ≤ 0.415m, a shading coefficient D / K ≤ 0.25, and each noon shadow moves a distance of one noon shadow width every 1-20 minutes, thereby ensuring the minimum light needs for crop growth and avoiding yield reduction due to insufficient photosynthesis.

[0039] It is also preferred that the dynamic wind-resistant flexible photovoltaic bracket power generation system includes the following a1 to a 10 or b1 to b8, or c1 to c6, or e1 to e8, or f1 to f 12 or any one of the technical features from g1 to g5, or y1 to y5:

[0040] a1D≤10mm, a2D≤20mm, a3D≤30mm, a4D≤50mm, a5D≤100mm, a6D≤235mm, a7D≤322mm, a8D≤415mm, a9D≤830mm, a 10 D≤1288mm;

[0041] b1H≥1m, b2H≥2m, b3H≥3m, b4H≥5m, b5H≥10m, b6H≥20m, b7H≥30m, b8H≥50m;

[0042] c1L≥10m, c2L≥20m, c3L≥50m, c4L≥80m, c5L≥150m, c6L≥500m;

[0043] e1K≥0.05m, e2K≥0.1m, e3K≥0.2m, e4K≥0.5m, e5K≥1m, e6K≥2m, e7K≥3m, e8K≥5m;

[0044] f1D / K≤0.01, f2D / K≤0.02, f3D / K≤0.03, f4D / K≤0.05, f5D / K≤0.1, f6D / K≤0.2, f7D / K≤0.3, f8D / K≤0.5, f9D / K≤1, f 10 D / K≤2, f 11 D / K≤3, f 12 D / K≤5;

[0045] g1K / H≤0.1, g2K / H≤0.5, g3K / H≤1, g4K / H≤2, g5K / H≤5;

[0046] y1B / D≥2, y2B / D≥3, y3B / D≥4, y4B / D≥5, y5B / D≥10.

[0047] It is also preferred that the dynamic wind-resistant flexible photovoltaic bracket power generation system has multiple adjacent photovoltaic power generation cables that continuously block, release, block again, and release again to take turns blocking the sunlight of the same crop, so that the crop can obtain intermittent light to stimulate crop growth and increase crop yield.

[0048] The load-bearing cables mentioned in this application generally refer to linear objects that can support photovoltaic panels through tensioning, including ropes, steel cables, chains, linear objects formed by connecting multiple sections of rods or tubes or profiles, etc.

[0049] Compared with the prior art, this application has the following beneficial technical effects.

[0050] First, it possesses all ten beneficial technical effects of the prior application, "High-altitude Photovoltaic Power Generation Method and Photovoltaic Power Generation Cable for Farmland (CN117792235B)," and is low-cost. This is because this application utilizes inexpensive flat panels, such as existing monocrystalline silicon photovoltaic panels (rather than expensive flexible thin-film cells), and encapsulates a different (flat-plate) photovoltaic power generation cable made with these flat panels.

[0051] Second, there will be no linkage and no resonance: the photovoltaic panels that make up the photovoltaic power generation cable in this application are separated structures, and there is no linkage connection between them. The violent swing of one photovoltaic panel will not be transmitted to other photovoltaic panels through a load-bearing cable. In a photovoltaic power generation cable that is hundreds of meters long, each photovoltaic panel will inevitably be affected by multiple strands, multiple phases, and multiple directions of strong winds at the same time. Their directions and combined forces will inevitably offset each other, making it difficult to superimpose and enhance each other, and difficult to form destructive force. Therefore, the dynamic wind resistance cost of this application is extremely low. Just like the separated structure of a string of leaves shown in Figure 11 (each leaf has its own freedom to swing, and the swing of one leaf will not cause other leaves to swing in step with it), the violent swing of one photovoltaic panel will not cause other photovoltaic panels to swing violently in step with it, that is, there will be no linkage and no resonance. However, the current flexible support photovoltaic power station solutions such as the background technology "A rocky desertification control system for a large-span flexible support photovoltaic power station (CN219812768U)", as shown in Figure 10, all use "two load-bearing cables" to stabilize the photovoltaic panels, and the photovoltaic panels are linked and connected to each other. The photovoltaic panels do not have their own freedom to swing. The twisting of one photovoltaic panel will inevitably affect the linkage and resonance of the other photovoltaic panel, making it difficult to resist strong winds and easy to be damaged. It is worth emphasizing that the "dynamic wind resistance" innovative implementation plan shown in Figure 5 of this application, which is different from the current "static wind resistance" technical route, has passed the actual test of Super Typhoon Makar No. 11 in 2024. Analysis shows that the "dynamic wind resistance" of this application adopts the strategy of treating movement with movement, while the "static wind resistance" of the prior art adopts the strategy of treating movement with static. The two have completely different ideas and the technical effects are in stark contrast.

[0052] Third, by saving one load-bearing cable, the dedicated stabilizing cable can be eliminated, resulting in lower costs and stronger wind resistance. Compared to the current flexible photovoltaic support (power generation) system built with "two load-bearing cables" and "one stabilizing cable", this application saves at least one load-bearing cable. In fact, one stabilizing cable can be shared by multiple power generation cables at the same time. It is even possible to install (or eliminate) a dedicated stabilizing cable and use the adjacent load-bearing cable as a stabilizing cable, which is extremely low cost and has extremely strong wind resistance.

[0053] Fourth, intermittent illumination can increase production and income: Because photovoltaic cables can be oriented north-south, can be very narrow and tall, and have a very low pitch-to-height ratio (K / H), the shadows of multiple adjacent photovoltaic cables can rotate to block sunlight as the sun moves (automatically and rapidly, without the need for power or manual intervention), allowing crops to receive intermittent illumination, thereby stimulating crop growth and increasing crop yield. This approach not only does not affect photosynthesis, but can actually promote crop growth and increase yield. The applicant previously posed the following question to the "Mou Xin Yi Yan" AI model: "I have conducted numerous experiments, blocking sunlight for 3-5 minutes every 20 minutes daily. This intermittent illumination can stimulate pitaya growth and increase yield. Why?" The response received is as follows: 1. As a plant, pitaya relies on photosynthesis for its growth and nutrients. However, prolonged exposure to sunlight can lead to excessive accumulation of photosynthetic products, affecting normal respiration and, in turn, the plant's overall metabolic balance. Intermittent lighting may help regulate the balance between photosynthesis and respiration, allowing plants to accumulate energy and nutrients during periods of light and carry out necessary respiration during periods of shade, thereby optimizing plant growth. 2. Light signal regulation. Light is not only a source of energy for photosynthesis but also a crucial signal for plant growth and development. Intermittent lighting may mimic the natural variations in light intensity, which are sensed by plants and converted into growth signals. Research has shown that light signals can regulate physiological processes such as plant growth cycles, flowering time, and fruit development. Therefore, intermittent lighting may promote the growth and yield of pitaya by affecting the light signal transmission pathway. 3. Reduce photoinhibition and photodamage. Under strong light, a plant's photosynthetic system may be inhibited or damaged, resulting in reduced photosynthetic efficiency. Intermittent lighting can reduce the risk of prolonged exposure to strong light, reducing the occurrence of photoinhibition and photodamage. This helps protect the photosynthetic system of pitaya, maintaining high photosynthetic efficiency, thereby promoting plant growth and increased yield. 4. Analysis of experimental results: Intermittent lighting may promote branch growth and leaf expansion in pitaya by regulating the secretion of growth hormones and the rate of cell division. Furthermore, good growth conditions help plants better absorb and utilize nutrients, laying a solid foundation for flowering and fruiting. Light is one of the key factors influencing flowering and fruiting in plants. Intermittent lighting may increase the flowering rate and fruit set rate of pitaya by optimizing light signal transduction pathways and promoting plant growth and development. Furthermore, good growth conditions also help improve fruit quality and yield, making the pitaya more plump and sweet. In summary, your experiment may have promoted the balance of photosynthesis and growth and development in pitaya through intermittent lighting, thereby increasing its growth rate and yield. However, the specific effects require further verification and analysis based on factors such as experimental conditions and plant variety. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] FIG1 is a schematic diagram of an application of the dynamic wind-resistant flexible photovoltaic bracket power generation system of the present application (Example 1) above cultivated land.

[0055] FIG2 is a schematic diagram of the horizontal projection cross-sectional structure of the multiple photovoltaic power generation cables in FIG1 in the cultivated land.

[0056] FIG3 is a schematic diagram of the structure of a photovoltaic panel, a load-bearing cable, a lever and a stabilizing cable in FIG1 .

[0057] FIG4 is a schematic side view of FIG3 .

[0058] FIG5 is a schematic structural diagram of a section of photovoltaic power generation cable in the present application (Example 2).

[0059] FIG. 6 is a schematic side view of FIG. 5 .

[0060] FIG. 7 is another schematic side view of a section of photovoltaic power generation cable.

[0061] FIG8 is a schematic structural diagram of an irrigation water pipe provided below the photovoltaic power generation cable in the present application (Example 3).

[0062] FIG9 is a schematic structural diagram of a photovoltaic power generation cable in the present application (Example 4) in which a supplementary light is provided below the cable.

[0063] FIG10 is a schematic diagram of the structure of the double load-bearing cables in the current flexible photovoltaic support to stabilize the photovoltaic panel.

[0064] FIG11 is a schematic diagram of the structure of a string of separated structure leaves.

[0065] FIG12 is a schematic structural diagram of a current hoop-type cable guard used in this application.

[0066] FIG13 is another side view schematic diagram of FIG5.

[0067] FIG14 is a schematic diagram of a horizontal projection cross-sectional structure of another type of photovoltaic power generation cables in FIG1 in a cultivated field.

[0068] FIG15 is a schematic diagram showing the positional relationship between a load-bearing cable and a photovoltaic panel.

[0069] FIG. 16 is a side view schematic diagram of FIG. 13 with a force limiter added.

[0070] Explanation of the accompanying numbers: 1-photovoltaic power generation cable, 2-load-bearing cable, 3-photovoltaic panel, 4-lever, 5-stabilizing cable, 6-support, 601-support beam (or support cable), 7-crop, 8-arable land, 9-shadow, 10-spring, 11-saddle, 12-electrical connection line, 13-water pipe (for irrigation), 14-large agricultural machinery, 15-water (for irrigation), 16-sunlight, 17-supplementary photoelectric lamp, 18-rope protection sleeve, 19-leaves, 20-limiting component, 21-force limiter. DETAILED DESCRIPTION

[0071] 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.

[0072] In the description of this application, it should be noted that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application. It should also be noted that, for ease of description, this application defines the longitudinal direction of the photovoltaic power generation cables and the load-bearing cables as the longitudinal direction, and the direction perpendicular thereto as the left and right directions.

[0073] It should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, "connected" can refer to both electrical and direct connection. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0074] Example 1

[0075] As shown in Figures 1, 2, 3, and 4, thousands of photovoltaic cables 1 are suspended in a north-south direction above a field of over a thousand mu (e.g., a wheat field, vegetable plot, cornfield, or orchard) at intervals of 0.5-3 meters, 3-15 meters above the ground. It should be noted that to highlight the photovoltaic cables 1, specific details such as levers 4 and stabilizing cables 5 are not shown in Figure 1.

[0076] The first step is to purchase some 182mm-wide photovoltaic cells and fabricate them into (lightweight) rectangular photovoltaic panels 3, each 202mm wide and 1200mm long. Because existing curved photovoltaic cells have a very small curvature and are expensive, it is difficult to manufacture circular photovoltaic cables with a narrow panel width D (e.g., diameter under 150mm). Therefore, lightweight rectangular photovoltaic modules are used.

[0077] In the second step, the long strips of photovoltaic modules are directly used as photovoltaic panels 3, and the photovoltaic panels 3 are placed on the same load-bearing cable 2 (including using a ring to put them on), and the photovoltaic panels 3 are connected end to end to form a photovoltaic power generation cable 1. It is best to use a load-bearing cable 2 with a high tensile strength of more than 1200 MPa, such as galvanized prestressed steel cables, high-strength fiber ropes, carbon fiber cables, glass fiber cables, steel wire ropes, lightweight pipes and other load-bearing cables2.

[0078] In the third step, the numerous photovoltaic cables 1 are suspended above the farmland 8 via supports 6 higher than 15 meters, similar to the installation of high-voltage transmission lines. The cable height H of the photovoltaic cables 1 can be set to 12 meters, the span L of a single span can be set to 120-500 meters, and the horizontal projection distance K of the photovoltaic cables 1 (on the farmland 8) is preferably set to 1.2-2.4 meters. For example, H can be ≥ 5m, 10m, 20m, 30m, or 50m. In short, the cable height H should be high enough to ensure that the tops of the crops 7 do not touch the photovoltaic cables 1. L can also be ≥ 10m, 20m, 50m, 100m, or 500m. In short, the span L should be large enough to reduce the number of supports 6, minimize the area occupied by the pile foundation, and avoid serious interference with the operation of large agricultural machinery 14. It is best to make K ≥ 1m or 2m or 3m or 5m or 10m. In short, the width of the photovoltaic power generation cable 1 and the width of the shadow 9 should be appropriately reduced to ensure the light needs of crop 7 growth to a minimum and avoid yield reduction due to insufficient photosynthesis.

[0079] In order to reduce the number of pile foundations, save floor space, and ensure that the photovoltaic power generation cable 1 can be erected along the north-south direction, during implementation, the supporting beam 601 in the support 6 may not be a rigid beam, but a flexible beam (i.e., a supporting cable), such as a very thick steel cable (not shown).

[0080] It should be noted that the photovoltaic panels 3 in the photovoltaic power generation cable 1 should not be fixed to the load-bearing cable 3, so that the photovoltaic panels 3 form the so-called "non-fixed connection", that is, the photovoltaic panels 3 can swing with the wind relative to the load-bearing cable 2 within a certain range, rather than being completely fixed, that is, they can each swing around the load-bearing cable 2 (or swing slightly left and right).

[0081] The length direction of the photovoltaic panel 3 is arranged in the same direction as the length direction of the load-bearing cable 2, so that the photovoltaic panel 3 remains in a static state facing the sky to receive sunlight for power generation; wherein, the height of the photovoltaic power generation cable 1 from the ground is the cable height H, the span of a single span of the photovoltaic power generation cable 1 is L, and the horizontal projection spacing of the photovoltaic power generation cable 1 is set to the shadow distance K; the shading coefficient D / K is ≤ 0.01 or 0.02 or 0.03 or 0.05 or 0.10 or 0.20 or 0.30 or 0.50 or 1 or 2 or 3, and the height ratio K / H is ≤ 0.1 or 0.5 or 1 or 2, (to ensure) the time for the same shadow 9 to pass through the same position on the same crop 7 does not exceed 30 minutes.

[0082] It is best to provide each photovoltaic panel 3 riding on the same load-bearing cable 2 with a lever 4, fix one end of the lever 4 on the photovoltaic panel 3 and the other end on the stabilizing cable 5, and stabilize the photovoltaic panel 3 through the lever 4 by virtue of the inherent elasticity and tension of the stabilizing cable 5, so that it remains in a stationary state facing the sky, so that when strong winds blow, each can swing around the load-bearing cable 2, thereby avoiding synchronized resonance and damage to the photovoltaic power generation cable 1.

[0083] It is also preferred that a cable guard 18 (e.g., a bearing, tube, or sheathing clamp) be mounted on the load-bearing cable 2, allowing the photovoltaic panel 3 to ride on the cable guard 18 to protect the load-bearing cable 2 and prevent wear and tear from the swinging photovoltaic panel 3. It is also preferred that a retaining member 20, such as a baffle or retaining pin, be provided on the cable guard to prevent the photovoltaic panel 3 from sliding along the load-bearing cable 2 and to prevent adjacent photovoltaic panels 3 from being squeezed or collided with each other.

[0084] It is also preferred that the ratio B / D of the length B of the lever 4 to the width D of the photovoltaic panel 3 is ≥ 2, 3, 4, 5, or 10. This is because the longer the lever 4, the greater the B / D, which makes it easier to exert a lever effect and stabilize the photovoltaic panel 3 with very little tension. The length B of the lever 4 is preferably 1-2 meters.

[0085] It is also preferred that a ∩-shaped saddle 11 is fixed to the back of the photovoltaic panel 3, and the ∩-shaped saddle 11 sits on the protective rope sleeve 18. The opening of the ∩-shaped saddle 11 is preferably closed to form a hinge structure.

[0086] It should be noted that, in specific implementations, the width of the photovoltaic cables 1 should be appropriately reduced and the spacing between them appropriately increased to ensure that the ratio of the cable width D to the shadow distance K of the horizontal projection of the photovoltaic cable 1 (on the cultivated land 8) is: D / K ≤ 0.01, 0.02, 0.03, 0.05, 0.10, 0.20, or 0.30. This allows the shadow 9 of the same photovoltaic cable 1 to quickly (e.g., within 5 minutes) pass over the same crop 7 as the sun moves (preferably, within 5 minutes, a distance equal to one cable width D). This prevents the same crop 7 from remaining in the shadow 9 of the same photovoltaic cable 1 for an extended period (e.g., more than 30 minutes), which would reduce photosynthesis and lead to reduced crop 7 yield. Studies have found that the length of time the shadow 9 remains on the same crop 7 is inversely proportional to H and directly proportional to D. Therefore, in order to reduce the impact of shadows on crop growth, the hanging height H of the photovoltaic power generation cable 1 should be increased as much as possible, and the board width D of the photovoltaic power generation cable 1 should be minimized. It is best to select H as 2-15m and the board width D as 10-25cm.

[0087] Example 2

[0088] As shown in Figures 5 and 6, referring to the above example, a number of long flat photovoltaic modules are directly used as photovoltaic panels 3, and are connected end to end on the same load-bearing cable 2. Lever 4 is used to pull them to the stabilizing cable 5, adjacent load-bearing cable 2 and other adjacent stabilizing objects, and they are connected in series with electrical connecting lines 12. Through supports 6 higher than 15 meters, they are suspended above the cultivated land 8 like high-voltage transmission lines, forming a dynamic wind-resistant flexible photovoltaic bracket power generation system.

[0089] Preferably, the other end of lever 4 is secured to stabilizing cable 5 via spring 10. This allows each lever to more easily swing around the load-bearing cable 2 when strong winds blow, thereby preventing synchronized resonance and damage to the photovoltaic panels 3. This way, when the wind is light, the torque generated by the wind blowing against the photovoltaic panels 3 is small and does not reach the yield point of spring 10, allowing the panels 3 to remain motionless, facing the sky and receiving sunlight 16 to generate electricity. When the wind is strong, the torque generated by the wind blowing against the photovoltaic panels 3 is large, exceeding the yield point of spring 10, causing spring 10 to begin to stretch, causing the panels 3 to swing individually, buffering the wind and enhancing the system's wind resistance, thereby preventing linkage and resonance damage. Lever 4 is preferably a hook arm as shown in Figure 13, with one end welded to the back of the photovoltaic panel 3 and hooked (i.e., riding on) the cable sheath 18, and the other end secured to the stabilizing cable 5. It is preferable to connect lever 4 and / or spring 10 to other adjacent load-bearing cables 2 (as shown in Figure 14), eliminating the need for a dedicated stabilizing cable 5 and further saving costs. It is also possible to make a plurality of adjacent photovoltaic power generation cables 1 share the same stabilizing cable 5 (not shown) to further reduce costs.

[0090] Preferably, as shown in Figure 7, the photovoltaic panel 3 is formed using a semi-flexible photovoltaic module with a bending radius greater than 0.30 meters to form a photovoltaic panel 3 with a certain curvature. This is because the currently cheaper semi-flexible photovoltaic modules all have a bending radius greater than 0.30 meters, making it difficult to manufacture into the small-diameter cylindrical photovoltaic power generation cable required in the background art "High-altitude Photovoltaic Power Generation Method and Photovoltaic Power Generation Cable for Cultivated Land (CN117792235B)". However, they can be used in this application to manufacture a curved photovoltaic panel 3 with a bending radius greater than 0.30 meters.

[0091] Preferably, as shown in Figure 15, among the (many) photovoltaic panels 3 on the same load-bearing cable 2, some photovoltaic panels 3 have a larger area on the left side of the load-bearing cable 2, and other photovoltaic panels 3 have a larger area on the right side of the load-bearing cable 2, so that when a gust of wind blows, some photovoltaic panels 3 are easy to swing clockwise and other photovoltaic panels 3 are easy to swing counterclockwise, so that the stabilizing cable 2 is simultaneously subjected to (many) multiple pulling forces in different directions, so as to form a situation where the resultant force of the stabilizing cable 2 is zero, thereby avoiding the stabilizing cable 2 from breaking, and making the photovoltaic panels 3 more likely to swing.

[0092] As best shown in FIG16 , the photovoltaic panel 3 is equipped with a force limiter 21 (e.g., composed of a pair of permanent electromagnets). During periods of calm, light winds, and low-level typhoons, the force limiter 21 exerts a pulling force to stabilize the photovoltaic panel 3 and keep it facing the sky. When strong winds strike, the photovoltaic panel 3 breaks free from the force limiter 21, and the spring 10 exerts a buffering tension to mitigate the wind force. The force limiter 21 can be a variety of existing force limiting devices, including a breaking bolt, an overload protector, a safety pin, or other devices, including electronically controlled force limiting devices.

[0093] Example 3

[0094] As shown in FIG8 , referring to the above examples 1 and 2, a water pipe 13 (for irrigation connected to the existing drip irrigation / sprinkler irrigation system) is added below the photovoltaic power generation cable 1, so that the photovoltaic panel 3 and the water pipe 13 share the load-bearing cable 2 and its support 6 to spray irrigation water 15 on the crops 7, and realize photovoltaic power generation + artificial rainfall, thereby transforming arid farmland into high-yield farmland with abundant rainwater.

[0095] It should be noted that it is best to use a spring 10 and a lever 4, with one end fixed to a water pipe 13, so that when strong winds blow, they can more easily swing around the load-bearing cable 2, thereby avoiding synchronized resonance and damage to the photovoltaic panel 3. In this way, when the wind is light, the torque generated by the wind blowing against the photovoltaic panel 3 will be small and will not reach the yield point of the spring 10. The photovoltaic panel 3 will remain motionless, facing the sky and remaining stationary to receive sunlight 16 to generate electricity. When the wind is strong, the torque generated by the wind blowing against the photovoltaic panel 3 will be large, exceeding the yield point of the spring 10, and the spring 10 will begin to stretch, causing the photovoltaic panel 3 to swing, thus avoiding linkage and resonance damage.

[0096] Example 4

[0097] As shown in FIG9 , based on the second embodiment, a supplementary light 17 (commonly known as a plant growth light) is added below the photovoltaic power generation cable 1, so that the photovoltaic panel 3, the supplementary light 17, and its power supply wire share the same load-bearing cable 2 and its support 6. This is used to supplement light for light-loving crops 7 at night to promote the growth of crops 7, thereby achieving a three-in-one agricultural photoelectric complementarity of photovoltaic power generation, nighttime supplementary light, and water irrigation. In this way, the technical solution of this application can not only utilize the excess sunlight 16 above the cultivated land 8 for photovoltaic power generation, but also can transfer water 15 for irrigation and supplement light for light-loving crops 7 at night to promote the growth of crops 7.

[0098] The above disclosure 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 dynamic wind-resistant flexible photovoltaic support power generation system, comprising a support, a load-bearing cable, and a photovoltaic panel, characterized by: ① Multiple photovoltaic panels are installed on the same load-bearing cable through a connecting device, so that each photovoltaic panel can swing relative to the load-bearing cable under strong winds to buffer wind force and enhance the system's wind resistance; ② In the absence of wind or with a light breeze, the photovoltaic panels remain relatively still facing the sky to receive sunlight and generate electricity; ③ Each photovoltaic panel is equipped with at least one buffer mechanism, including but not limited to a spring or lever mechanism, which can effectively reduce the swaying amplitude of the photovoltaic panel when encountering strong winds, thereby protecting the photovoltaic panel from excessive stress and automatically assisting the photovoltaic panel to return to a relatively static state facing the sky after the strong wind passes; ④ Multiple photovoltaic panels on the same load-bearing cable are electrically connected in parallel or / and series to form a complete photovoltaic power generation cable, which is suspended in the air between two supports.

2. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 1 is characterized in that: One end of the spring is connected to the photovoltaic panel or lever, and the other end is connected to a stabilizer to limit the swing amplitude of the photovoltaic panel, prevent the photovoltaic panel from circling around the load-bearing cable, and avoid breaking the electrical connection wires; Alternatively, one end of the lever is connected to the photovoltaic panel and the other end is connected to a stabilizer to limit the swing amplitude of the photovoltaic panel, prevent the photovoltaic panel from circling around the load-bearing cable, and avoid breaking the electrical connection line.

3. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 1 is characterized in that: A non-fixed connection device is used between the photovoltaic panel and the load-bearing cable, including but not limited to a hinge structure, so that the photovoltaic panel can swing around the load-bearing cable with strong wind to prevent the photovoltaic panel on the adjacent seat from swinging.

4. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 1 is characterized in that: The ratio of the lever length B to the photovoltaic panel width D is B / D ≥ 1; or the yield points of the springs are different; or the lever lengths B are different.

5. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 3 is characterized by: There is a rope guard on the hoop of the load-bearing cable, and the photovoltaic panel sits on the rope guard to protect the load-bearing cable from wear and tear.

6. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 3 is characterized by: A ∩-shaped saddle or an annular saddle is fixed on the back or side of the photovoltaic strip, and the ∩-shaped saddle or the annular saddle sits on the protective rope sleeve to form a non-fixed connection device.

7. The dynamic wind-resistant flexible photovoltaic support power generation system according to claim 2, characterized in that: One end of the lever is connected to the photovoltaic panel, the other end is connected to one end of a spring, and the other end of the spring is connected to a stabilizer.

8. The dynamic wind-resistant flexible photovoltaic bracket power generation system according to claim 1, characterized in that: The height of the photovoltaic power generation cable from the ground surface is the cable height H, the single span of the photovoltaic power generation cable is the span L, and the horizontal projection distance of the photovoltaic power generation cable is the shadow distance K; the shading coefficient D / K ≤ 5, and the height ratio K / H ≤ 10.

9. The dynamic wind-resistant flexible photovoltaic support power generation system according to any one of claims 1 to 8, comprising any one or more of the following technical features ① to ⑦: ① Photovoltaic power cables are installed along the north-south direction, which includes all directions with an angle of less than 39° to the meridian; ② An irrigation water pipe is installed on the photovoltaic power generation cable, and the photovoltaic power generation cable and the irrigation water pipe share the same load-bearing rope and support; ③ A supplementary light is installed on the photovoltaic power generation cable. The photovoltaic power generation cable, the supplementary light and its power supply wire share the same load-bearing cable and support; ④ The load-bearing cable or the cable sleeve is provided with a limiting component to prevent the photovoltaic panels from sliding along the load-bearing cable and to prevent adjacent photovoltaic panels from colliding with each other; ⑤ The photovoltaic panel is a curved photovoltaic panel with a bending radius greater than 0.30m; ⑥ Among the multiple photovoltaic panels on the same load-bearing cable, some photovoltaic panels are located on the left side of the load-bearing cable with a larger area, while others are located on the right side of the load-bearing cable with a larger area; ⑦ The areas of photovoltaic panels on the left and right sides of the load-bearing cable are not equal; ⑧The photovoltaic panel is equipped with a force limiter, which is used to limit the photovoltaic panel during periods of low winds, so that it remains stationary facing the sky. When strong winds come, the photovoltaic panel is released from the force limiter, and the spring plays a buffering role to buffer the wind force. ⑨ Rope height H ≥ 2m, board width D ≤ 0.415m, shading coefficient D / K ≤ 0.25, each noon shadow moves a distance equal to the width of the noon shadow every 1-20 minutes.

10. The dynamic wind-resistant flexible photovoltaic support power generation system according to any one of claims 1 to 7, characterized in that: It includes any one of the following technical features: a1 to a10, b1 to b8, c1 to c6, e1 to e8, f1 to f12, g1 to g5, or y1 to y5: a1D≤10mm, a2D≤20mm, a3D≤30mm, a4D≤50mm, a5D≤100mm, a6D≤235mm, a7D≤322mm, a8D≤415mm, a9D≤830mm, a10D≤1288mm; b1H≥1m, b2H≥2m, b3H≥3m, b4H≥5m, b5H≥10m, b6H≥20m, b7H≥30m, b8H≥50m; c1L≥10m, c2L≥20m, c3L≥50m, c4L≥80m, c5L≥150m, c6L≥500m; e1K≥0.05m, e2K≥0.1m, e3K≥0.2m, e4K≥0.5m, e5K≥1m, e6K≥2m, e7K≥3m, e8K≥5m; f1D / K≤0.01, f2D / K≤0.02, f3D / K≤0.03, f4D / K≤0.05, f5D / K≤0.1, f6D / K ≤0.2, f7D / K≤0.3, f8D / K≤0.5, f9D / K≤1, f10D / K≤2, f11D / K≤3, f12D / K≤5; g1K / H≤0.1, g2K / H≤0.5, g3K / H≤1, g4K / H≤2, g5K / H≤5; y1B / D≥2, y2B / D≥3, y3B / D≥4, y4B / D≥5, y5B / D≥10.

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