Photovoltaic module wind resistance performance testing device and method based on flexible bracket

Abstract

The present invention discloses a photovoltaic module wind resistance performance test device based on a flexible bracket, comprising a frame, two parallel steel cables are arranged above the frame, and photovoltaic modules are installed on the steel cables; a first simulation component comprises two first swing rods and a first driving component that drives the first swing rods to swing up and down, the two first swing rods are respectively connected to the two steel cables, driving the two steel cables to vibrate up and down; a second simulation component comprises four second swing rods and a second driving component that drives the second swing rods to swing up and down independently, and the amplitudes of different groups of second swing rods are the same or different; a third simulation component comprises four independently lifting top corner fixing sleeves, which are respectively fixed at the four top corners of the photovoltaic module. The present invention uses swing rods with different swing modes to simulate the scene where the steel cable is subjected to different wind forces, so as to test the wind resistance of the photovoltaic module under different wind force scenes and improve the accuracy of the photovoltaic module performance test.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module testing, and in particular to a device and method for testing the wind resistance performance of a photovoltaic module based on a flexible support. Background Art

[0002] During the development of photovoltaic project resources, some places have good light resources and are suitable for the construction of photovoltaic power generation projects, but the terrain slope is large, and there is not enough land in conventional terrain, making it difficult for fixed photovoltaic brackets to adapt. Therefore, flexible brackets came into being.

[0003] The flexible bracket is a large-span photovoltaic module support structure formed by a prestressed flexible cable structure with both ends fixed. Compared with the traditional fixed bracket, the flexible bracket installs photovoltaic panels on rows of steel cables, and the two ends of the steel cables are connected by rigid supports. It can cross complex terrains such as gullies, steep slopes, and streams, effectively improving land utilization. In the same land area, the span area is increased, and more photovoltaic modules can be installed on the flexible bracket. It has the advantages of large span, high clearance, good crack resistance, etc., and the bottom farming space is large, which meets the needs of agricultural photovoltaic complementarity.

[0004] The wind resistance test of photovoltaic modules is an important part to ensure the safe and stable operation of photovoltaic power stations. When conducting wind resistance tests on photovoltaic modules, it is necessary to fully consider environmental factors such as wind force level, wind direction, temperature, humidity, as well as the actual conditions such as the installation angle, height, and number of photovoltaic modules.

[0005] At present, the wind resistance test of photovoltaic modules is carried out based on fixed brackets. When the wind resistance performance of photovoltaic modules is tested on flexible brackets, the flexible brackets themselves will shake due to the wind. When the photovoltaic modules are installed on the flexible brackets, there will be a large difference between their wind resistance and the test results, resulting in inaccurate test results of the photovoltaic modules. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a photovoltaic module wind resistance performance testing device and method based on a flexible bracket, which is used to simulate the scenario where the photovoltaic module is installed on a flexible bracket and is subjected to wind force, so as to obtain the wind resistance test results of the photovoltaic module on the flexible bracket.

[0007] To this end, the technical solution of the present invention is: a photovoltaic module wind resistance performance testing device based on a flexible support, comprising a rack and a first simulation component, a second simulation component and a third simulation component that work alternately;

[0008] Two parallel steel cables are arranged above the frame, and the photovoltaic modules are installed on the steel cables;

[0009] The first simulation component includes two first swing rods and a first driving component that drives the first swing rods to swing up and down, and the two first swing rods are respectively connected to two steel cables to drive the two steel cables to vibrate up and down;

[0010] The second simulation component includes four second swing rods and a second driving component that drives the second swing rods to swing up and down independently, the second swing rods are grouped in pairs, the same group is connected to the same steel cable, and the amplitudes of the second swing rods in different groups are the same or different;

[0011] The third simulation component includes four independently lifting top corner fixing sleeves, which respectively fix the four top corners of the photovoltaic component.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: multiple photovoltaic modules are installed side by side on two steel cables, the first swing rod is connected to the middle position of the steel cables, and the first driving assembly synchronously drives the first swing rods on both sides to swing with an amplitude of 0 to 20 cm.

[0013] On the basis of the above scheme and as a preferred scheme of the above scheme: the first driving component includes a first driving motor, the first driving motor drives a transmission shaft through gears, the two ends of the transmission shaft drive the first eccentric wheel to rotate through a pulley group, and the first eccentric wheel drives the first swing rod to swing up and down.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: only a single photovoltaic module is installed on the two steel cables, the position where the second pendulum connects the steel cables is located on the four top corner sides of the photovoltaic module, and the second pendulum can swing independently with an amplitude of 0 to 20 cm.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: the second driving assembly includes four sets of independently arranged second driving motors, and the second driving motor drives the second swing rod to swing up and down through the second eccentric wheel.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: the third simulation component also includes four independently arranged electric cylinders, and the top angle fixing sleeves are installed at the ends of the electric cylinders.

[0017] On the basis of the above scheme and as a preferred scheme of the above scheme: the frame is provided with a first slide rail and a second slide rail that slide with each other, and the first simulation component, the second simulation component and the third simulation component are all slidably installed on the second slide rail.

[0018] The second technical solution of the present invention is: a method for testing the wind resistance performance of photovoltaic modules based on a flexible support, including the following three test modes:

[0019] S1, Test Mode 1:

[0020] S1.1 Install multiple groups of photovoltaic modules side by side on two steel cables;

[0021] S1.2 Connect the top of the first swing rod to the middle of the steel cable;

[0022] S1.3 Start the first drive motor, which drives the first swing up and down through the transmission shaft, the pulley set, and the first eccentric wheel, thereby driving the two steel cables to vibrate up and down with an amplitude of 0 to 20 cm, which is used for the photovoltaic module excitation fatigue test;

[0023] S2, test mode 2:

[0024] S2.1 Install a single PV module on two steel cables, with the length of the PV module spanning the two steel cables;

[0025] S2.2 Move the four second swing arms to the four corners of the photovoltaic module and connect them to the steel cables; at the same time, adjust the position of the second drive motor so that the second swing arms are in a vertical position;

[0026] S2.3 starts the second drive motor, and the four second swing arms swing independently, driving the steel cables at the four corners of the photovoltaic module to vibrate up and down, with an amplitude of 0 to 20 cm; the amplitudes of the two steel cables may be inconsistent, which is used to perform dynamic T-type distribution test of photovoltaic modules;

[0027] S3, test mode three:

[0028] S3.1 A single photovoltaic module is installed on two steel cables, the electric cylinder of the third simulation module is moved to a suitable position, and the four top corners of the photovoltaic module are fixed in the top corner fixing sleeves;

[0029] S3.2 Adjust the height of the electric cylinder so that the photovoltaic module maintains an inclined state with one side higher than the other side for 3 hours;

[0030] S3.3 Swap the heights of the electric cylinders on both sides to change the tilt direction of the PV module and maintain this for 3 hours for the static volume distribution test of the PV module.

[0031] On the basis of the above scheme and as a preferred scheme of the above scheme: the three test modes are independent of each other and do not interfere with each other.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. Use pendulums with different swing modes to simulate the scenarios where the steel cables are subjected to different wind forces, so as to test the wind resistance of photovoltaic modules under different wind force scenarios, thereby improving the accuracy of wind resistance performance testing of photovoltaic modules on flexible brackets.

[0034] 2. Combining the three test modes together can comprehensively test the wind resistance of photovoltaic modules, reduce testing costs, and make operation more convenient.

[0035] 3. The first simulation component, the second simulation component and the third simulation component can move along the second slide rail to adjust the position of the test point, so as to facilitate the testing of photovoltaic components of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention;

[0037] Figure 2 It is a top view of the structure of the present invention;

[0038] Figure 3 It is a structural schematic diagram of the present invention (with the frame hidden);

[0039] Figure 4 This is a state diagram of test mode 1 of the present invention;

[0040] Figure 5 This is a state diagram of the second test mode of the present invention;

[0041] Figure 6 This is a state diagram of test mode three of the present invention.

[0042] Marked in the figure are: frame 1, first slide rail 11, second slide rail 12, steel cable 2, photovoltaic component 3, first simulation component 4, first swing arm 41, first drive motor 42, transmission shaft 43, first eccentric wheel 44, second simulation component 5, second swing arm 51, second drive motor 52, second eccentric wheel 53, third simulation component 6, electric cylinder 61, and top angle fixing sleeve 62. DETAILED DESCRIPTION

[0043] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0045] See the attached drawings. The photovoltaic module wind resistance performance test device based on the flexible support described in this embodiment includes a frame 1, and two parallel steel cables 2 are arranged above the frame 1. The steel cables 2 are distributed along the X-axis. A clamp (not shown in the figure) is arranged on the steel cables 2, and the photovoltaic module 3 can be mounted on the steel cables 2 by the clamp. A first slide rail 11 and a second slide rail 12 that slide with each other are arranged below the frame 1. The first slide rail 11 is distributed along the Y-axis, and the second slide rail 12 is distributed along the X-axis. The second slide rail 12 can move along the first slide rail 11.

[0046] The first simulation component 4 , the second simulation component 5 and the third simulation component 6 are slidably mounted on the second slide rail 12 , and the first simulation component 4 , the second simulation component 5 and the third simulation component 6 work alternately with each other.

[0047] The first simulation component 4 includes two first swing rods 41 and a first driving component that drives the first swing rods 41 to swing up and down. The first driving component includes a first driving motor 42. The first driving motor 42 drives a transmission shaft 43 through gears. Both ends of the transmission shaft 43 drive a driven shaft through a pulley group. The driven shaft is equipped with a first eccentric wheel 44. The lower end of the first swing rod 41 is connected to the first eccentric wheel 44. The first driving motor 42 drives the first eccentric wheel 44 to rotate through the transmission shaft 43, the pulley group and the driven shaft. The first eccentric wheel 44 drives the first swing rod 41 to swing up and down. The top ends of the two first swing rods 41 are respectively connected to the middle positions of the two steel cables 2, which can drive the two steel cables 2 to vibrate up and down with an amplitude of 0 to 20 cm. During actual testing, multiple photovoltaic modules 3 can be installed side by side on the two steel cables 2, the first swing arm 41 is connected to the middle position of the steel cables 2, and the first driving assembly synchronously drives the first swing arms 41 on both sides to swing. At the same time, wind resistance tests are performed on multiple photovoltaic modules 3 to simulate the fatigue attenuation of the photovoltaic module frame and the overall mechanical structure of the module under wind-induced vibration.

[0048] The second simulation component 5 includes four second swing rods 51 and a second drive component that drives the second swing rods 51 to swing up and down independently. The second drive component includes four groups of independently set second drive motors 52. The second drive motors 52 are slidably mounted on the second slide rail 12 through the second base, and the position can be adjusted according to the specifications of the photovoltaic component 3. The second eccentric wheel 53 is installed on the output shaft of the second drive motor 52. The lower end of the second swing rod 51 is connected to the second eccentric wheel 53. The second drive motor 52 drives the second swing rod 51 to swing up and down through the second eccentric wheel 53. The second swing rods 51 are arranged in groups of two. The two second swing rods 51 in the same group are distributed along the X axis. The top ends of the second swing rods 51 in the same group are connected to the same steel cable 2. The amplitudes of the second swing rods 51 in different groups can be inconsistent, and the amplitude is 0 to 20 cm.

[0049] During the actual test, only a single photovoltaic module 3 is installed on the two steel cables 2, and the second swing rod 51 is connected to the steel cables 2 at the four corners of the photovoltaic module 3. The second swing rod 51 is driven by an independent second drive motor 52 and can swing independently. Simulate the actual wind-induced vibration dynamic wind pressure uneven working conditions of the photovoltaic module, the inconsistent wind load body shape coefficients on the upper and lower surfaces, the pressure difference between the upper and lower surfaces of the module, and the module battery cells, frames, glass and the overall structure's ability to resist uneven loads (pulsating wind).

[0050] The third simulation component 6 includes four independently arranged electric cylinders 61, which are arranged in groups of two, and the bottom is slidably mounted on the second slide rail 12 through the third base. The top of the electric cylinder 61 is provided with a top corner fixing sleeve 62, and the four top corners of a single photovoltaic component 3 can be inserted into the top corner fixing sleeve 62. At the same time, the height of the top corner fixing sleeves 62 on both sides of the length direction of the photovoltaic component is adjusted, so that the photovoltaic component 3 can maintain a state where one side is high and the other side is low. Simulate the uneven wind pressure of the actual photovoltaic component. The wind load body shape coefficients on the upper and lower surfaces are inconsistent. There is a pressure difference between the upper and lower surfaces of the photovoltaic component, and the component cells, frames, and glass have the ability to resist uneven loads (average wind).

[0051] The three test modes involved in this embodiment are independent of each other and do not interfere with each other. The details are as follows:

[0052] Test mode 1 (PV module excitation fatigue test) simulates the fatigue attenuation of the PV module frame and the overall mechanical structure of the module under wind-induced vibration. The details are as follows:

[0053] 1. Adjustment of steel cable spacing: Confirm the installation spacing of components before the test, and adjust the steel cable spacing of the flexible bracket comprehensive fatigue test equipment simultaneously. The adjustment method is as follows:

[0054] 1.1 Unloading of steel cable: Unload the preload on the steel cable to make the steel cable unloaded. The preload of the steel cable is controlled by a hydraulic device, which is equipped with a pressure control button.

[0055] 1.2 Adjust the distance between the two steel cables: Move the two ends of the steel cables in the I-beam slots of the equipment, and adjust the distance between the two steel cables synchronously according to the steel cable distance required by the test plan. The current adjustment range of the distance between the two steel cables of the equipment is: 1300mm~2000mm;

[0056] 1.3 Tighten the pressure control knob of the hydraulic press in a clockwise direction, apply pressure to the required value through the handle of the hydraulic press, and apply preload to the steel cable.

[0057] 2. Adjust the synchronization of the transmission shafts at both ends of the transmission shaft on the first drive assembly so that the belt on the pulley group is in a taut state to avoid slipping.

[0058] 3. Amplitude adjustment: The amplitude during the test is adjusted by adjusting the distance between the first eccentric wheel on the first swing rod and the center of the driven shaft.

[0059] 4. Module installation: Install the clamps on the steel cable according to the module hole spacing, and then install multiple groups of photovoltaic modules 3 side by side on two steel cables 2. The photovoltaic modules 3 are fixed to the steel cables 2 by the clamps. The short side direction of the photovoltaic modules 3 is the X-axis direction, which is consistent with the direction of the steel cable, and the long side direction is the Y-axis direction, which is perpendicular to the steel cable.

[0060] The top of the first swing rod 41 is connected to the middle position of the steel cable 2, and the lower end of the first swing rod 41 is connected to the first eccentric wheel 44; at this time, the second swing rod 51 is not connected to the steel cable;

[0061] 5. Parameter adjustment: Set the parameters according to the test requirements. First, apply preload force to the steel cable through the hydraulic pressure, generally apply it to 30~60kN, try to make the preload force of the steel cables on both sides basically consistent, and then set the number of tests and the running time (the equipment will stop automatically when the running time is reached.) The frequency adjustment needs to be adjusted when the equipment is running. Before operation, safety protection measures (protective nets or protective covers) need to be set. The output knob of the inverter is adjusted by observing the real-time display value on the operation interface to control the frequency.

[0062] The first drive motor 42 is started, and the first drive motor 42 drives the first swing 41 to swing up and down through the transmission shaft 43, the pulley group, and the first eccentric wheel 44, thereby driving the two steel cables 2 to vibrate up and down with an amplitude of 0 to 20 cm, which is used to simulate the scene of the steel cables swinging due to wind.

[0063] Actual test:

[0064] Test parameters: 2P installation, amplitude 100mm, vibration frequency 30 times / min, total test 20,000 times, check the status every 10,000 times;

[0065] Dynamic observation: observe abnormal defects of component frames, component connectors, component glass, etc.;

[0066] Static observation: Confirm the failure conditions of component power, EL, insulation, grounding, appearance, etc. every 10,000 times.

[0067] Test mode 2 (dynamic reciprocating fatigue test of flexible bracket components) simulates the actual component wind-induced vibration dynamic wind pressure uneven working conditions, the wind load body shape coefficients on the upper and lower surfaces are inconsistent, there is a pressure difference between the upper and lower surfaces of the component, and the component cells, frames, glass and overall structure are able to resist uneven loads (pulsating wind), as follows:

[0068] 1. Module installation: Install a single photovoltaic module 3 on two steel cables 2 through a clamp, and adjust the position of the photovoltaic module so that the module is placed in the middle of the installation plane, with the length direction of the photovoltaic module spanning the two steel cables.

[0069] 2. Adjust the position of the second drive motor 52 on the second slide rail 12 and lock it so that the four second swing arms 51 move to the four corners of the photovoltaic module 3 and connect to the steel cable 2. At this time, the first swing arm 41 is not connected to the steel cable.

[0070] 3. Amplitude adjustment: adjust the amplitude of the four second drive motors according to the test requirements, and adjust the amplitude during the test by adjusting the distance between the second eccentric wheel on the second swing rod and the center of the output shaft of the second drive motor.

[0071] 4. Parameter adjustment: adjust the operating frequency and motor direction of each second drive motor according to the test requirements, and set the number of tests and test time;

[0072] Start the second drive motor 52, and the four second swing arms 51 swing independently, driving the steel cables at the four top corners of the photovoltaic module 3 to vibrate up and down with an amplitude of 0 to 20 cm; the amplitudes of the two steel cables 2 may be inconsistent, which is used to simulate the scene where the steel cables are in a crosswind state.

[0073] Actual test:

[0074] Test parameters: 1P installation, vibration frequency 30 times / min, amplitude 100 / 150mm, cycle number 20000 times, check the status and change the amplitude direction every 1h;

[0075] Dynamic observation: observe abnormal defects of component frames, component connectors, component glass, etc.;

[0076] Static observation: confirm the failure conditions of component power, EL, insulation, grounding, appearance, etc. every 10,000 times;

[0077]

[0078]

[0079] Test mode 3 (static component shape distribution test) simulates the actual component wind pressure uneven wind conditions, the wind load body shape coefficients on the upper and lower surfaces are inconsistent, there is a pressure difference between the upper and lower surfaces of the component, and the component cells, frames, and glass have the ability to resist uneven loads (average wind), as follows:

[0080] 1. Module installation: Install a single photovoltaic module 3 on two steel cables 2 through a clamp, and adjust the position of the photovoltaic module so that the module is placed in the middle of the installation plane, with the length direction of the photovoltaic module spanning the two steel cables.

[0081] 2. Electric cylinder adjustment: Slide the movable guide rail at the bottom of the equipment to make the top corner fixing sleeve 62 on the top of the electric cylinder correspond to the four corners of the photovoltaic module, and then adjust the lifting button of the electric cylinder to make the height of the top corner fixing sleeve 62 flush with the height of the module. Fine-tune the height of the guide rail and the electric cylinder to make the top corner fixing sleeve 62 fit the photovoltaic module well.

[0082] 3. Fix the slide rail and lock the motor: After the electric cylinder is adjusted to the correct position, turn the fixing knobs at the bottom of the second slide rail and the electric cylinder clockwise to fix and lock them.

[0083] 4. Parameter adjustment: Set parameters according to test requirements, such as force, running time, and set the corresponding rising and falling states of each cylinder. Adjust the height of the electric cylinder 61 so that the photovoltaic module 3 maintains a tilted state with one side higher and the other side lower for 3 hours; swap the heights of the electric cylinders 61 on both sides, change the tilt direction of the photovoltaic module 3, and continue to maintain it for 3 hours to test the wind resistance of the photovoltaic module itself.

[0084] During the actual test:

[0085] Test parameters: 1P installation, 500Pa on the upper surface of the windward end, 1000Pa on the lower surface, 1000Pa on the upper surface of the leeward end, 500Pa on the lower surface, test time 6h for each wind direction, check the status every 1h;

[0086] Dynamic observation: observe abnormal defects of component frames, component connectors, component glass, etc.;

[0087] Static observation: Confirm the failure status of component power, EL, insulation, grounding, appearance, etc. every 1 hour.

[0088] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A photovoltaic module wind resistance performance test device based on a flexible support, characterized in that: It includes a rack and a first simulation component, a second simulation component and a third simulation component that work alternately; Two parallel steel cables are arranged above the frame, and the photovoltaic modules are installed on the steel cables; The first simulation component includes two first swing rods and a first driving component that drives the first swing rods to swing up and down, and the two first swing rods are respectively connected to two steel cables to drive the two steel cables to vibrate up and down; The second simulation component includes four second swing rods and a second driving component that drives the second swing rods to swing up and down independently, the second swing rods are grouped in pairs, the same group is connected to the same steel cable, and the amplitudes of the second swing rods in different groups are the same or different; The third simulation component includes four independently lifting top corner fixing sleeves, which respectively fix the four top corners of the photovoltaic component.

2. The photovoltaic module wind resistance performance testing device based on a flexible bracket according to claim 1, characterized in that: A plurality of photovoltaic modules are installed side by side on the two steel cables, a first swing rod is connected to the middle position of the steel cables, and a first driving assembly synchronously drives the first swing rods on both sides to swing with an amplitude of 0 to 20 cm.

3. The photovoltaic module wind resistance performance testing device based on a flexible bracket according to claim 2, characterized in that: The first driving assembly includes a first driving motor, which drives a transmission shaft through gears. Both ends of the transmission shaft drive the first eccentric wheel to rotate through a pulley set, and the first eccentric wheel drives the first swing rod to swing up and down.

4. The photovoltaic module wind resistance performance testing device based on a flexible bracket according to claim 1, characterized in that: Only a single photovoltaic module is installed on the two steel cables. The second pendulum rod is connected to the steel cables at the sides of the four top corners of the photovoltaic module. The second pendulum rod can swing independently with an amplitude of 0 to 20 cm.

5. The photovoltaic module wind resistance performance testing device based on a flexible support as claimed in claim 4, characterized in that: The second driving assembly includes four sets of independently arranged second driving motors, and the second driving motor drives the second swing rod to swing up and down through the second eccentric wheel.

6. The photovoltaic module wind resistance performance testing device based on a flexible bracket according to claim 1, characterized in that: The third simulation component also includes four independently arranged electric cylinders, and the top angle fixing sleeves are installed at the ends of the electric cylinders.

7. The photovoltaic module wind resistance performance testing device based on a flexible bracket according to claim 1, characterized in that: The frame is provided with a first slide rail and a second slide rail which are slidably matched with each other, and the first simulation component, the second simulation component and the third simulation component are all slidably mounted on the second slide rail.

8. A method for testing the wind resistance of photovoltaic modules based on a flexible support, characterized in that: There are three test modes: S1, Test Mode 1: S1.1 Install multiple groups of photovoltaic modules side by side on two steel cables; S1.2 Connect the top of the first swing rod to the middle of the steel cable; S1.3 Start the first drive motor, which drives the first swing up and down through the transmission shaft, the pulley set, and the first eccentric wheel, thereby driving the two steel cables to vibrate up and down with an amplitude of 0 to 20 cm, which is used for the photovoltaic module excitation fatigue test; S2, test mode 2: S2.1 Install a single PV module on two steel cables, with the length of the PV module spanning the two steel cables; S2.2 Move the four second swing arms to the four corners of the photovoltaic module and connect them to the steel cables; at the same time, adjust the position of the second drive motor so that the second swing arms are in a vertical position; S2.3 starts the second drive motor, and the four second swing arms swing independently, driving the steel cables at the four corners of the photovoltaic module to vibrate up and down, with an amplitude of 0 to 20 cm; the amplitudes of the two steel cables may be inconsistent, which is used to perform dynamic T-type distribution test of photovoltaic modules; S3, test mode three: S3.1 A single photovoltaic module is installed on two steel cables, the electric cylinder of the third simulation module is moved to a suitable position, and the four top corners of the photovoltaic module are fixed in the top corner fixing sleeves; S3.2 Adjust the height of the electric cylinder so that the photovoltaic module maintains an inclined state with one side higher than the other side for 3 hours; S3.3 Swap the heights of the electric cylinders on both sides to change the tilt direction of the PV module and maintain this for 3 hours for the static volume distribution test of the PV module.

9. The method for testing wind resistance of photovoltaic modules based on a flexible support as claimed in claim 8, characterized in that: The three test modes are independent of each other and do not interfere with each other.

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