T-shaped Photovoltaic Cable Power Generation System and T-shaped Photovoltaic Rod

Abstract

The present application provides a T-shaped photovoltaic cable power generation system and a T-shaped photovoltaic rod. The T-shaped photovoltaic rod includes a narrow and long photovoltaic panel that stands upright and can generate electricity on both sides, and a narrow and long reflector that lies flat on the lower side of the photovoltaic panel. The photovoltaic panel can simultaneously receive direct sunlight and reflected sunlight from the reflector to generate electricity. The present application uses inexpensive components such as current monocrystalline silicon photovoltaic panels to encapsulate another type of photovoltaic power generation cable - the T-shaped photovoltaic cable, which has high power generation efficiency and low power generation cost.

Description

Technical Field

[0001] This application belongs to the technical field of photovoltaic power generation and agricultural production, and specifically relates to a T-shaped photovoltaic cable power generation system and a T-shaped photovoltaic rod (i.e., a slender photovoltaic cell module). Background Art

[0002] The applicant's prior application "Cultivated Land High-altitude Photovoltaic Power Generation Method and Photovoltaic Power Generation Suspension Cable (CN117792235B)" provided a method for photovoltaic power generation using the high altitude of cultivated land and a photovoltaic power generation suspension cable. It laid a photovoltaic cell layer around a horizontally suspended load-bearing cable with high tensile strength to encapsulate a photovoltaic power generation suspension cable, and erected supports to install the photovoltaic power generation suspension cable over the cultivated land. On the one hand, it absorbs the surplus solar energy in the high altitude for power generation, and on the other hand, it can also be used for water conveyance and irrigation by the way, realizing the complementary development of agricultural production and photovoltaic power generation - agricultural-photovoltaic complementarity. It has a large span and few pile foundations, and can avoid seriously interfering with agricultural machinery operations. It overcomes many technical defects of the existing agricultural-photovoltaic complementary technologies, such as large power generation fluctuations, difficult high-altitude installation, high installation labor costs, difficult cleaning and maintenance, short service life, and the unexploited surplus solar energy resources over the cultivated land not being fully and effectively utilized. Among them, a photovoltaic power generation suspension cable is composed of multiple shorter photovoltaic power generation suspension cables connected together; each shorter photovoltaic power generation suspension cable forms a photovoltaic cell module, which is called a photovoltaic cell rod, or simply a photovoltaic rod for short.

[0003] However, during the implementation of production, it is found that at the present stage, due to the lack of economies of scale, the price of flexible thin-film photovoltaic cells (about 1.6 yuan / watt) is difficult to drop to the price level of monocrystalline silicon photovoltaic panels (about 0.7 yuan / watt) in the short term. Therefore, the cost of the photovoltaic power generation suspension cable encapsulated with them will still be relatively high in the coming years. Summary of the Invention

[0004] One of the purposes of this application: To provide a T-shaped photovoltaic cable power generation system, so as to use cheap flat battery modules such as current monocrystalline silicon photovoltaic panels to encapsulate another photovoltaic power generation suspension cable with high power generation efficiency and low power generation cost - the T-shaped photovoltaic cable.

[0005] Another purpose of this application: To provide another T-shaped photovoltaic rod (module) with high power generation efficiency and low power generation cost, so as to be strung into a T-shaped photovoltaic cable.

[0006] In order to achieve the above-mentioned first invention purpose, a T-shaped photovoltaic cable power generation system provided by this application is as follows.

[0007] This application provides a T-shaped photovoltaic cable power generation system, which is characterized in that it includes:

[0008] ① A linear photovoltaic cell module with a (reversed) T-shaped cross-section - a T-shaped photovoltaic rod (module); the T-shaped photovoltaic rod includes a narrow and long photovoltaic (cell) panel that generates electricity on both sides and stands upright, and a narrow and long reflector that lies flat on the lower side of the photovoltaic panel. The reflector reflects the sunlight incident on it to the photovoltaic panel, so that the photovoltaic panel simultaneously receives direct sunlight and (reflected sunlight from the reflector), thereby irradiating the photovoltaic panel with multiple portions of sunlight simultaneously to generate electricity, so as to improve the (photovoltaic panel's) power generation efficiency and reduce the (system's) power generation cost; the reflector described here can be a mirror reflector, a matte white reflector, a reflective film, or a reflective metal foil and other reflective surface materials, and can be either a flat reflector or a curved or concave reflector;

[0009] ② A photovoltaic power generation suspension cable formed by connecting multiple T-shaped photovoltaic rods in series with a load-bearing cable - a T-shaped photovoltaic cable; the height of the T-shaped photovoltaic cable from the ground surface is H, the span of a single span of the T-shaped photovoltaic cable is L, and the horizontal projection spacing of the T-shaped photovoltaic cable is K; among them, H is greater than the set height dimension, L is greater than the set span dimension, and K is greater than the set spacing dimension;

[0010] ③ The shadow projected by the T-shaped photovoltaic cable on the ground surface, including the horizontal projection; among them, the ratio of the thickness dimension D of the T-shaped photovoltaic rod (which is also the thickness dimension D of the T-shaped photovoltaic cable) to the horizontal projection spacing K of the T-shaped photovoltaic cable - the shading coefficient: D / K is less than the set coefficient value; preferably, D / K ≤ 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, to ensure that each noon shadow moves a distance equal to the width of one noon shadow every 1 - 20 minutes (preferably every 1 - 5 minutes), so as to avoid the time when the same shadow passes over the same crop being too long (for example, exceeding 30 minutes), which may cause the photosynthesis of the crop to weaken and the yield to decrease; in order to unify the detection standard, the noon shadow is defined here as the shadow projected by the sun on the ground surface of the T-shaped photovoltaic cable at noon (that is, from 11:00 to 13:00).

[0011] Preferably, D ≤ 10mm or 20mm or 30mm or 50mm or 100mm or 200mm or 300mm or 500mm or 680mm or 790mm; the best thickness dimension D is 10mm to 200mm, because the shadow of the T-shaped photovoltaic cable with this thickness dimension D on the ground is relatively narrow, and the time it takes to pass over the crop is short, without affecting normal photosynthesis.

[0012] Preferably, H ≥ 1m or 2m or 3m or 5m or 10m or 20m or 30m or 50m or 100m. The height H should be high enough to ensure that the top of the tallest crop will not touch the T-shaped photovoltaic cable. Preferably, H ≥ 5m to ensure that it does not interfere with the operation of large agricultural machinery and drones.

[0013] Preferably, L ≥ 10 m or 20 m or 50 m or 80 m or 150 m or 500 m or 1000 m. The span L should be large enough to reduce the number of high supporting rods, decrease the floor area of the pile foundation, and avoid seriously hindering the operation of large agricultural machinery. Preferably, L ≥ 120 m for super-large span applications.

[0014] Preferably, K ≥ 0.05 m or 0.1 m or 0.2 m or 0.5 m or 1 m or 2 m or 3 m or 5 m or 10 m. The spacing K should be appropriately widened to reduce the shadow area of the T-shaped photovoltaic cable, minimally ensure the lighting requirements for crop growth, and avoid crop yield reduction due to insufficient photosynthesis.

[0015] Research shows that by reducing the shading coefficient to make D / K ≤ 0.25 and increasing the cable height to make H ≥ 3 m, the sunlight required by the crops is blocked for 3 - 5 minutes every 20 minutes, and intermittent lighting of the crops is carried out by constantly blocking, releasing, blocking again, and releasing again, which can stimulate crop growth and increase crop yield. The test data shows that when the above intermittent lighting measures are adopted, the sunlight absorbed by the crops is reduced by an average of 13 - 20%. One set of data shows that when the sunlight irradiation is reduced by less than 13% (i.e., D / K ≤ 0.15), it has no effect on the photosynthesis and yield of the crops, but instead stimulates crop growth and increases crop yield; another set of data shows that when the sunlight irradiation is reduced by more than 20% (i.e., D / K ≥ 0.25), it begins to have some impact on the photosynthesis and yield of the crops. Therefore, it is not recommended to reduce the sunlight irradiation by more than 20% in specific implementation.

[0016] Research shows that the length of time a shadow passes over the same crop is inversely proportional to H and directly proportional to D. Taking Xiuying District, Haikou City as an example, the shadow of a 50-meter-high T-type photovoltaic cable running north-south moved at a speed of 68 cm / minute at noon on March 4 (11 o'clock); if the height H of the T-type photovoltaic cable is reduced to 4.6 meters, the shadow movement speed will drop to 2.5 cm / minute, and if the height H of the T-type photovoltaic cable is reduced to 1.2 meters, the shadow movement speed will drop to 0.6 cm / minute. At noon on March 4 (13:30), the height H of the T-type photovoltaic cable was reduced to 5 meters, and the shadow movement speed would drop to 1.3 cm / minute. Comparative observations over the same period show that the shadow of a 5-meter-high T-type photovoltaic cable running east-west moved at a speed of only 0.33 mm / minute (towards the south), which is too slow. In specific implementation, it is necessary to avoid installing thicker T-type photovoltaic cables along the east-west direction as much as possible, and to install them along the north-south direction as much as possible. It can be seen that in order to reduce the impact of slow shadow movement on crop growth, the hanging height H of the T-type photovoltaic cable should be increased as much as possible. Given that when the height H is 1 meter, the shadow stays on the crop for a long time, which will seriously affect the growth of the crop, it is not recommended to use such a low height H; of course, in order to reduce the impact of slow shadow movement on crop growth, the thickness D of the T-type photovoltaic cable should be minimized.

[0017] In summary, in specific implementation, the height H should be preferably above 2m, preferably above 4m; the thickness dimension D should be preferably below 0.25m, preferably below 0.15m; the horizontal projection spacing K should also be preferably above 0.5m, preferably above 1m; D / K≤0.25, preferably the golden ratio of D / K≤0.15. The current market's small-sized photovoltaic panels are 1.22m×0.61m in size, and the shadow they produce is 0.61m wide, three times the maximum preferred shadow width of 0.25m 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 weaken the photosynthesis of the crop and reduce the yield, and will inevitably cause a greater ecological and environmental impact on the original crops in the cultivated land.

[0018] In specific implementation, the shading coefficient D / K should be selected according to the types of crops in the cultivated land. For crops that need shading nets to adjust the light level and for forests that do not care about yield, such as vegetable crops such as lettuce, lettuce, spinach, cabbage, mustard, celery, trees, grasslands, etc., the shading coefficient D / K can be appropriately increased, the spacing K can be reduced, and the thickness D can be increased.

[0019] Preferably, the T-shaped photovoltaic cable power generation system is characterized in that: the T-shaped photovoltaic cable is suspended in the air between two supports along the north-south direction, and the north-south direction includes all directions with an included angle less than 39 degrees with the meridian; the photovoltaic panels with double-sided power generation in the T-shaped photovoltaic cable face east on one side and west on the other side; the included angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 120°. In this way, the shadow movement speed can also be increased, so that the shadow quickly moves away from the same crop, reducing the impact on the photosynthesis of the crop.

[0020] Also preferably, the T-shaped photovoltaic cable power generation system is characterized in that: the included angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 90°; preferably, the included angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 87°, so as to prevent the photovoltaic panel from not receiving direct and reflected sunlight during noon (within about 1 - 2 minutes), resulting in the system having no power or very little power generation.

[0021] Also preferably, the T-shaped photovoltaic cable power generation system is characterized in that: the T-shaped photovoltaic rods are connected to the stabilizing cable through stabilizing arms or / and buffer springs, so that each T-shaped photovoltaic rod can swing with the wind when strong wind comes, buffering the wind force and reducing the wind resistance. It should be noted that the buffer springs here can effectively slow down the swinging amplitude of the T-shaped photovoltaic rods, thereby protecting the photovoltaic panels from excessive stress, and automatically assisting the T-shaped photovoltaic rods to reset after strong wind, so that the photovoltaic panels and the reflectors maintain a relatively static state facing the sky.

[0022] Also preferably, the T-shaped photovoltaic cable power generation system includes any one or any combination of the following technical features ① - ⑩.

[0023] Technical feature ①, the T-shaped photovoltaic rods are hung on a load-bearing cable, the upper edge of the photovoltaic panel is directly below the load-bearing cable, and the horizontal projection of the load-bearing cable projects on the upper edge of the photovoltaic panel; the T-shaped photovoltaic rods can swing around the load-bearing cable with the wind, and their swing angles are limited within 180° by stabilizing arms or / and buffer springs, so as to prevent the swing amplitude of the T-shaped photovoltaic rods around the load-bearing cable from exceeding 360° and breaking the connecting wires.

[0024] Technical feature ②, the T-shaped photovoltaic rods straddle a load-bearing cable, and the lower edge of the photovoltaic panel is above the load-bearing cable.

[0025] Technical feature ③, the T-shaped photovoltaic rods are laid on multiple load-bearing cables, and both sides of the reflector are fixed on the load-bearing cables.

[0026] Technical feature ④, the T-shaped photovoltaic rods are connected to counterweights through stabilizing arms, so that the photovoltaic panels always maintain a side-standing (i.e., perpendicular to the ground) posture.

[0027] Technical feature ⑤: An irrigation water pipe (including a water hose) connected to the existing drip irrigation / sprinkler irrigation system is added (or externally hung) on the T-shaped photovoltaic cable. The T-shaped photovoltaic cable and the irrigation water pipe share the load-bearing cable and supports, which are used for irrigating crops, spraying pesticides or fertilizers and water, so as to realize the complementary use of agriculture and light. In this way, the technical solution of this application can not only generate electricity by using the redundant sunlight in the air above the cultivated land, but also convey water for irrigation by the way, and can also absorb the heat of the photovoltaic panel to achieve the effects of heat dissipation and cooling and improving the power generation efficiency.

[0028] Technical feature ⑥: A supplementary photovoltaic lamp (commonly known as a plant growth lamp) is added (or externally hung) on the T-shaped photovoltaic cable. The T-shaped photovoltaic cable, the supplementary photovoltaic lamp and its power supply wire share the load-bearing cable and the support rod, which are used for supplementing light to light-loving crops at night to promote the growth of crops. In this way, the technical solution of this application can not only generate electricity by using the redundant sunlight in the air above the cultivated land, but also convey water for irrigation by the way, and can also supplement light to light-loving crops at night to promote the growth of crops.

[0029] Technical feature ⑦: The diameter of the load-bearing cable is 1.5 - 4.5 times the thickness of the photovoltaic panel, so that the load-bearing cable can intercept the hail falling directly above, thereby reducing the damage of hail to the photovoltaic panel.

[0030] Technical feature ⑧: The angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 90°.

[0031] Technical feature ⑨: The angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 87°.

[0032] Technical feature ⑩: Ventilation and water-permeable gaps are provided at the intersection of the photovoltaic panel and the reflector to facilitate ventilation and water permeability, cleaning and dust removal, and reducing wind resistance.

[0033] In order to achieve the second object of the above invention, a T-shaped photovoltaic rod (module) provided by this application is as follows.

[0034] A T-shaped photovoltaic rod (module) of this application is characterized in that: it is a linear photovoltaic cell module with an (inverted) T-shaped structure in cross section; the linear module includes a narrow and long photovoltaic (cell) panel with double-sided power generation standing upright, and a narrow and long reflector lying flat under the photovoltaic panel; the reflector reflects the sunlight incident on it to the photovoltaic panel, so that the photovoltaic panel simultaneously receives two-way sunlight, namely direct sunlight and (reflected sunlight from the reflector), so as to irradiate the photovoltaic panel with multiple portions of sunlight at the same time for power generation, so as to improve the power generation efficiency of the photovoltaic panel and reduce the power generation cost of the photovoltaic panel.

[0035] Preferably, for the T-shaped photovoltaic rod (module), it is characterized in that: the angles θ between the reflector and the front and back surfaces of the photovoltaic panel are respectively ≤ 120° or ≤ 90° or ≤ 87°.

[0036] Preferably, the T-shaped photovoltaic rod (component) is characterized in that a ventilation and water-permeable gap is provided at the intersection of the photovoltaic panel and the reflector.

[0037] Compared with the prior art, the present application has the following beneficial technical effects.

[0038] First, it has all ten beneficial technical effects of the prior application "Cultivated land high-altitude photovoltaic power generation method and photovoltaic power generation suspension cable (CN117792235B)".

[0039] Second, the T-shaped photovoltaic cable encapsulated by using current low-cost components such as monocrystalline silicon photovoltaic panels can improve the power generation efficiency of the (photovoltaic panel) because it has the function of simultaneously receiving multiple light sources such as direct sunlight and reflected sunlight for power generation.

[0040] Third, low cost: The current average price of photovoltaic panels is 200 yuan / m 2 , and the reflector can use a reflector such as aluminized glass with an average price of 40 yuan / m 2 . It can be seen that compared with using only photovoltaic panels for power generation, when collecting the same amount of sunlight energy for power generation, using the T-shaped photovoltaic rod with a reflector for power generation can greatly reduce the power generation cost of the (photovoltaic panel). In other words, the present application replaces about 50% of the expensive photovoltaic panels with low-cost reflectors, which can greatly reduce the power generation cost.

[0041] Fourth, no linkage and no resonance: The T-shaped photovoltaic rods in the present application are in a separated structure and there is no linkage connection between them. The violent swing of one T-shaped photovoltaic rod will not be transmitted to other T-shaped photovoltaic rods through a load-bearing cable, and resonance will not occur.

[0042] Fifth, intermittent light and high frequency and fast speed of shadow movement: When the T-shaped photovoltaic cable is hung in a north-south direction, its shadow can quickly move away from the crops. Some vegetable test experiments conducted by the applicant show that the sunlight is blocked for a while every period of time, for example, the sunlight is blocked for 1-5 minutes every 20-30 minutes, and the sunlight is blocked and released in such a cycle. The shadow of the T-shaped photovoltaic cable blocks and releases the sunlight multiple times and quickly every day, so that the crops under the T-shaped photovoltaic cable can have intermittent light multiple times and for a long time, which can basically meet the growth needs of having sunlight throughout the day. Experimental data show that this intermittent light measure not only does not affect photosynthesis, but can also increase the yield of vegetables and other crops, truly realizing the win-win situation of "agriculture" and "photovoltaic". BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 FIG. is an application schematic diagram of the T-shaped photovoltaic cable power generation system (Example 1) of the present application on a piece of cultivated land.

[0044] Figure 2 is Figure 1Schematic diagram of the horizontal projection cross-section structure of multiple T-shaped photovoltaic cables on cultivated land.

[0045] Figure 3 is Figure 1 Schematic diagram of the structure of a photovoltaic rod (module) in

[0046] Figure 4 is Figure 3 Schematic diagram of the cross-section structure of a photovoltaic rod (module) in

[0047] Figure 5 is Figure 3 Schematic diagram of the cross-section structure of another type of photovoltaic rod (module) in

[0048] Figure 6 is Figure 1 Schematic diagram of the cross-section structure of a section of T-shaped photovoltaic cable in

[0049] Figure 7 is Figure 1 Schematic diagram of the structure of two adjacent sections of T-shaped photovoltaic cables in

[0050] Figure 8 Schematic diagram of the structure in which an irrigation water pipe is provided below a section of T-shaped photovoltaic cable in this application (Example 2).

[0051] Figure 9 Schematic diagram of the structure in which a supplementary photoelectric lamp is provided below a section of T-shaped photovoltaic cable in this application (Example 3).

[0052] Figure 10 is Figure 3 Schematic diagram of the structure in which ventilation and water-permeable gaps are provided on the photovoltaic rod (module) in

[0053] Figure 11 is Figure 6 Another schematic diagram of the structure in which the buffer spring and the stabilizing cable are replaced by counterweights in

[0054] Figure 12 Schematic diagram of a structure in which two load-bearing cables and one stabilizing cable are used to fix a photovoltaic panel in a current flexible photovoltaic bracket.

[0055] Explanation of the reference numerals in the drawings: 1 - T-shaped photovoltaic cable, 101 - T-shaped photovoltaic rod, 2 - load-bearing cable, 3 - photovoltaic panel, 4 - reflector, 5 - stabilizing arm, 6 - buffer spring, 7 - stabilizing cable, 8 - cultivated land, 9 - shadow, 10 - sunlight, 11 - support, 12 - crop, 13 - cross beam, 14 - agricultural machinery, 15 - irrigation water pipe, 16 - connecting piece, 17 - sprayed water, 18 - supplementary photoelectric lamp, 19 - ventilation and water-permeable gap, 20 - counterweight, 21 - connecting wire, 22 - screw. Detailed implementation manners

[0056] To make the technical means, creative features, achieved objectives and effects of this application easy to understand, the following further elaborates this application in conjunction with specific implementation manners.

[0057] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0058] It should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "communication" should be understood in a broad sense. For example, "communication" can be electrical communication or direct connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] Example 1.

[0060] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 shown, over a piece of cultivated land of thousands of mu (such as wheat fields or vegetable fields or corn fields or orchards) 8, thousands of T-shaped photovoltaic cables 1 spaced 0.5 - 1.5 meters apart and 3 - 5 meters above the ground are suspended in the north-south direction.

[0061] First step, purchase some single-crystal photovoltaic cells with a width of 182 mm, and fabricate them into long-strip photovoltaic (cell) panels 3 with a width of 202 mm and a length of 1200 mm that can generate electricity on both sides for standby.

[0062] Second step, purchase some aluminized glass mirrors with a width of 202 mm and a length of 1200 mm as reflector plates 4 for standby.

[0063] Third step, take two reflector plates 4 as a group, use them as the bottom edge of an inverted T-shaped structure, and stand the photovoltaic panel 3 upright in the middle position of the bottom edge, so that two reflector plates 4 and one photovoltaic (cell) panel 3 form a T-shaped photovoltaic rod 101 of an inverted T-shaped structure.

[0064] Desirably, the angles θ between the front and back sides of the reflector plate 4 and the photovoltaic panel 3 should be ≤ 90° respectively.

[0065] Also desirably, ventilation and water-permeable gaps 19 are provided at the intersection of the photovoltaic panel 3 and the reflector plate 4 for ventilation, water permeability, drainage, dust removal, and wind resistance reduction.

[0066] Preferably, the T-shaped photovoltaic rod 101 is connected to the stabilizing cable 7 through the stabilizing arm 5 or / and the buffer spring 6, so that each T-shaped photovoltaic rod 101 can swing with the wind when strong wind comes, so as to buffer the wind force and reduce the wind resistance. It should be noted that the buffer spring 6 described here can effectively slow down the swinging amplitude of the T-shaped photovoltaic rod 101, thereby protecting the photovoltaic panel 3 from excessive stress, and automatically assisting the T-shaped photovoltaic rod 101 to reset after the strong wind, so that the photovoltaic panel 3 and the reflector 4 maintain a relatively static state facing the sky.

[0067] Preferably, the T-shaped photovoltaic rod 101 is hung on a load-bearing cable 2, the upper edge of the photovoltaic panel 3 is located directly below the load-bearing cable 2, and the horizontal projection of the load-bearing cable 2 projects on the upper edge of the photovoltaic panel 3; the T-shaped photovoltaic rod 101 can swing around the load-bearing cable 2 with the wind, and its swing angle is limited within 180° by the stabilizing arm 5 or / and the buffer spring 6, so as to prevent the swing amplitude of the T-shaped photovoltaic rod 101 around the load-bearing cable 2 from exceeding 360° and breaking the connecting wire 21.

[0068] Preferably, the T-shaped photovoltaic rod 101 straddles a load-bearing cable 2, and the lower edge of the photovoltaic panel 3 is located above the load-bearing cable 2 (not shown in the figure).

[0069] Preferably, the T-shaped photovoltaic rod 101 is laid on two load-bearing cables 2, and both sides of the reflector 4 are respectively fixed on the two load-bearing cables 2. For reference Figure 12 , the "load-bearing cable" and "stabilizing cable" in "A large-span hyperbolic suspension flexible photovoltaic bracket (CN219834036U)" are used to fix the T-shaped photovoltaic rod 101, so that the photovoltaic panels 3 therein face fixed directions (due east and due west), thereby stabilizing the light-receiving area and improving the power generation efficiency. The scheme of using two load-bearing cables 2 to fix the T-shaped photovoltaic rod 101 is feasible but not advisable, because when the wind force is very strong, the swing of one T-shaped photovoltaic rod 101 will inevitably involve the swing of the other two adjacent T-shaped photovoltaic rods 101, and resonance is very likely to occur, which is easy to damage the entire T-shaped photovoltaic cable 1.

[0070] Preferably, the diameter of the load-bearing cable 2 is 1.5-4.5 times the thickness of the photovoltaic panel 3, so that the load-bearing cable 2 can intercept the hail falling directly above, thereby reducing the damage of the hail to the photovoltaic panel 3.

[0071] The fourth step, as Figure 7 shown, a large number of T-shaped photovoltaic rods 101 are connected in series by a load-bearing cable 2 to form a T-shaped photovoltaic cable 1. As Figure 1 shown, a large number of T-shaped photovoltaic cables 1 are suspended in the air 3-5 meters above the ground in the north-south direction to form a T-shaped photovoltaic cable power generation system that can not only generate electricity, but also be cultivated as usual and does not occupy cultivated land 8.

[0072] Embodiment 2.

[0073] like Figure 5 , Figure 6 As shown, referring to the above example, the angle θ between the reflector 4 and the front and back surfaces of the photovoltaic panel 3 is modified to ≤87° or 75°. In this way, it can be avoided that the photovoltaic panel 3 cannot receive direct and reflected sunlight 10 at noon (about 1-2 minutes), causing the system to be out of power or generate very little power. In this way, in the morning, some sunlight 10 can directly shine on the east side of the photovoltaic panel 3 from the east, and other sunlight 10 can shine on the reflector 4 from the east and then reflect to the east side of the photovoltaic panel 3; in the afternoon, some sunlight 10 can directly shine on the west side of the photovoltaic panel 3 from the west, and other sunlight 10 can shine on the reflector 4 from the west and then reflect to the west side of the photovoltaic panel 3, so that the photovoltaic panel 3 can obtain double light for power generation.

[0074] Embodiment three.

[0075] like Figure 11 As shown, referring to the above two steps, the T-shaped photovoltaic rod 101 is connected to the counterweight 20 through the stabilizing arm 5, and the photovoltaic panel 3 always maintains a sideways (ie, perpendicular to the ground) posture by relying on the self-gravity of the counterweight 20.

[0076] Embodiment 4.

[0077] like Figure 8 As shown, referring to the above three steps, an irrigation water pipe (including a water hose) 15 (connected to the current drip irrigation / sprinkler irrigation system) is added (or hung) on ​​the T-shaped photovoltaic cable 1, and the T-shaped photovoltaic cable 1 and the irrigation water pipe 15 share the load-bearing cable 2 and the support 11, which are used to irrigate the crops 12, spray pesticides or water fertilizers, so as to achieve agricultural and photovoltaic complementarity. In this way, the technical solution of this application can not only use the surplus sunlight 10 above the cultivated land 8 for photovoltaic power generation, but also can transport water for irrigation, and can also absorb the heat of the photovoltaic panel 3 to achieve the effect of heat dissipation and cooling, and improve the power generation efficiency.

[0078] Embodiment five.

[0079] like Figure 9 As shown, referring to the above four steps, a supplementary light 18 (commonly known as a plant growth light) is added (or hung) on ​​the T-shaped photovoltaic cable 1. The T-shaped photovoltaic cable 1 and the supplementary light 18 and their power wires share the load-bearing cable 2 and the support 11, which are used to supplement light for the light-loving crops 12 at night to promote the growth of the crops 12. In this way, the technical solution of the present application can not only use the surplus sunlight 10 above the cultivated land 8 for photovoltaic power generation, but also can transport water for irrigation, and can also supplement light for the light-loving crops 12 at night to promote the growth of the crops 12.

[0080] The above-disclosed is only the preferred embodiment of the present application. The accompanying drawings are only schematic structural diagrams and are not drawn according to the actual size ratio, and 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 T-shaped photovoltaic cable power generation system, comprising an erected support, a horizontally hung load-bearing cable, and a photovoltaic panel arranged on the load-bearing cable, characterized in that it Including: A T-shaped photovoltaic rod, which is a linear photovoltaic cell module with a T-shaped cross-section; the T-shaped photovoltaic rod includes a narrow and long photovoltaic panel with double-sided power generation standing upright, and a narrow and long reflector lying flat under the photovoltaic panel. The reflector reflects the sunlight incident on it to the photovoltaic panel, so that the photovoltaic panel receives direct sunlight and reflected sunlight at the same time, so as to irradiate the photovoltaic panel with multiple portions of sunlight at the same time to generate electricity; The T-shaped photovoltaic rod is suspended below a load-bearing cable. The upper edge of the photovoltaic panel is directly below the load-bearing cable, and the horizontal projection of the load-bearing cable projects on the upper edge of the photovoltaic panel; the T-shaped photovoltaic rod can swing around the load-bearing cable with the wind, and its swing angle is limited within 180° by a stabilizing arm or / and a buffer spring; A T-shaped photovoltaic cable, which is a photovoltaic power generation suspension cable formed by connecting multiple T-shaped photovoltaic rods in series with a load-bearing cable; the height of the T-shaped photovoltaic cable from the ground is H, the span of a single span of the T-shaped photovoltaic cable is L, and the horizontal projection spacing of the T-shaped photovoltaic cable is K; among them, H is greater than the set height dimension, L is greater than the set span dimension, K is greater than the set spacing dimension, and the ratio D / K of the thickness dimension D of the T-shaped photovoltaic rod to the horizontal projection spacing K of the T-shaped photovoltaic cable is ≤3.

2. The T-shaped photovoltaic cable power generation system according to claim 1, characterized in that: The T-shaped photovoltaic cable is suspended in the air between two supports along the north-south direction, and the north-south direction includes all directions with an included angle less than 39 degrees with the meridian; the double-sided power generation photovoltaic panels in the T-shaped photovoltaic cable face east on one side and west on the other side; the included angles θ between the reflector and the front and back sides of the photovoltaic panel are respectively ≤120°.

3. The T-shaped photovoltaic cable power generation system according to claim 1, characterized in that: The T-shaped photovoltaic rod is connected to the stabilizing cable through a stabilizing arm or / and a buffer spring, so that each T-shaped photovoltaic rod can swing with the wind when strong wind comes, so as to buffer the wind force and reduce the wind resistance.

4. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: The T-shaped photovoltaic rod is connected to a counterweight through a stabilizing arm, so that the photovoltaic panel always maintains an upright posture.

5. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: An irrigation water pipe is added to the T-shaped photovoltaic cable. The T-shaped photovoltaic cable and the irrigation water pipe share the load-bearing cable and the support, so as to irrigate crops, spray pesticides or water and fertilizer.

6. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: A supplementary photoelectric lamp is added to the T-shaped photovoltaic cable. The T-shaped photovoltaic cable, the supplementary photoelectric lamp and its power supply wire share the load-bearing cable and the support pole, so as to supplement light to light-loving crops at night.

7. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: The diameter of the load-bearing cable is 1.5-4.5 times the thickness of the photovoltaic panel, so that the load-bearing cable can intercept the hail falling directly above, thereby reducing the damage of the hail to the photovoltaic panel.

8. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: The included angles θ between the reflector and the front and back sides of the photovoltaic panel are respectively ≤90°.

9. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: The included angles θ between the reflector and the front and back sides of the photovoltaic panel are respectively ≤87°.

10. The T-shaped photovoltaic cable power generation system according to claim 1 or 2 or 3, characterized in that: Ventilation and water-permeable gaps are provided at the intersection of the photovoltaic panel and the reflector.

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