A photovoltaic integrated machine heat resistance performance verification experimental system

Abstract

The present invention discloses a photovoltaic integrated machine heat resistance performance verification experimental system, which comprises: an experimental carrier box, a sealed experimental chamber is arranged inside the experimental carrier box, the inner wall of the experimental carrier box is made of high temperature resistance and high strength, an adjusting frame is arranged in the sealed experimental chamber, and the photovoltaic integrated machine is horizontally installed on the adjusting frame; light source groups are symmetrically distributed on the left and right sides above the sealed experimental chamber for simulating the sunlight illumination environment; a frame is fixed on the upper middle side of the sealed experimental chamber, and guide rods are vertically slidably connected to the frame, and the guide rods are two symmetrically distributed on the left and right, and electric heating pipe groups are fixed to the lower ends of the two guide rods; a sand covering component is arranged in the sealed experimental chamber, and the sand covering component is horizontally overhead arranged above the adjusting frame, and the sand covering component covers the surface of the photovoltaic integrated machine with a sand layer, so that sand layers with different coverage rates and different morphological distributions are formed on the photovoltaic integrated machine.

Description

Technical Field

[0001] The invention belongs to the technical field of heat resistance testing of photovoltaic equipment, and in particular is a thermal resistance performance verification experimental system for an integrated photovoltaic machine. Background Art

[0002] Photovoltaic integrated equipment is a new energy device that converts solar energy into electrical energy. Its working principle is based on the photoelectric effect, that is, when sunlight shines on the photovoltaic panel, photons interact with electrons in the semiconductor material to directly convert light energy into electrical energy. Since the photovoltaic integrated equipment is in a high temperature environment during use, its heat resistance directly affects the performance and service life of the photovoltaic integrated equipment; currently, for the photovoltaic integrated equipment heat resistance test experiment, such as the invention patent disclosed by patent number CN1 16505877A, it can directly provide multiple groups of different light intensities to the solar panel to be tested, and at the same time monitor the temperature of the tested solar panel through the temperature control module, so as to complete the heat resistance test of the solar panel; however, since the photovoltaic integrated equipment is actually put into use, its surface is very easy to accumulate dust or sand layer to form a heat collection layer, which hinders the heat exchange between the battery cell and the environment, resulting in an increase in the working temperature of the battery cell, causing the heat resistance of the photovoltaic integrated equipment in actual use to be far lower than the experimental detection value, affecting the allocation and use effect of the photovoltaic integrated equipment.

[0003] Therefore, it is necessary to provide a photovoltaic integrated machine heat resistance performance verification experimental system to solve the problems raised in the above background technology. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solutions: a photovoltaic integrated machine heat resistance performance verification experimental system, comprising: an experimental carrier box, a sealed experimental chamber is provided inside the experimental carrier box, the inner wall of the experimental carrier box is made of high temperature resistance and high strength, an adjustment frame is provided in the sealed experimental chamber, and the photovoltaic integrated machine is horizontally installed on the adjustment frame;

[0005] A light source group is symmetrically distributed on the upper left and right sides of the sealed experimental chamber, and the light source group is composed of a plurality of solar simulators arranged in a matrix, which are used to simulate the sunlight illumination environment;

[0006] A frame is fixed on the upper middle side of the sealed experimental chamber, and a guide rod is vertically slidably connected to the frame. The guide rods are two symmetrically distributed on the left and right, and an electric heating pipe group is fixed at the lower ends of the two guide rods. A telescopic rod is vertically fixed at the upper end of the experimental carrier box, and the telescopic end of the telescopic rod is connected to the electric heating pipe group;

[0007] A sand covering component is provided in the sealed experimental chamber, and the sand covering component is horizontally suspended above the adjustment frame. The sand covering component covers the surface of the photovoltaic integrated machine with a sand layer, so that sand layers with different coverage rates and different morphological distributions are formed on the photovoltaic integrated machine;

[0008] The sand coating assembly comprises:

[0009] A fixed bracket, which is horizontally fixed on the inner wall of the experimental carrier box, and two guide seats are slidably arranged on the fixed bracket, and a crossbeam is connected between the guide seats;

[0010] A sand loading box is fixed on one side of the crossbeam, a partition is horizontally fixed in the sand loading box, and the partition is used to divide the sand loading box into two sand bins, wherein the upper and lower sand bins store the first category sand and the second category sand respectively;

[0011] Sandblasting tubes are arranged and distributed below the sand carrying box. The sandblasting tubes are all connected to the sand bin below. A section tube is connected to the sandblasting tube. A sand tube is arranged at the upper end of the section tube. One end of the sand tube is fixed on the partition and connected to the sand bin above. A sand guide leaf is rotatably connected inside the sand tube.

[0012] The sandblasting tube mixes and proportions the first-category sand and the second-category sand, and sprays the proportioned sand particles on the surface of the photovoltaic integrated machine.

[0013] Further, preferably, the adjustment frame comprises:

[0014] A steel plate frame, one side of which is vertically fixed with a connecting frame, and the connecting frame is rotatably connected to a structural frame;

[0015] A hydraulic drive arm is connected obliquely to one side of the steel plate frame. One end of the hydraulic drive arm is connected to the structural frame;

[0016] The rotation angle of the structural frame is not greater than 90°, and a recovery channel is provided below the steel plate frame in the experimental carrier box for collecting and processing excess sand particles.

[0017] Further, as a preference, a rotating shaft seat is fixed at the center of the structural frame, a connecting shaft is rotatably arranged in the center of the rotating shaft seat, one end of the connecting shaft is assembled and fixed to the photovoltaic integrated machine, two linear vibrators are symmetrically arranged on the structural frame with the rotating shaft seat as the center point, one end of the linear vibrators are hinged to the structural frame, a connector is provided at the vibration end of the linear vibrator, and is rotatably connected to the photovoltaic integrated machine through the connector, and a spring group is connected between the linear vibrator and the connector.

[0018] Further, as a preference, the sand coating assembly further comprises:

[0019] A lifting part is vertically fixed on the crossbeam, a fixing plate is arranged parallel to the lower side of the crossbeam, and the telescopic end of the lifting part is connected to the fixing plate;

[0020] A brush scraper is installed below the fixed plate.

[0021] Further, as a preference, a flow bin is provided above the inside of the sandblasting tube, the joint tube is connected to the flow bin, a bypass channel is obliquely provided on one side of the flow bin, the bypass channel is connected to the sand bin below through an outer tube, and a second sand guide leaf is rotatably provided in the bypass channel;

[0022] A mixing chamber is provided below the flow chamber in the sandblasting tube, a mixing shaft is provided in the center of the mixing chamber for rotation, a driving motor is installed on the sandblasting tube, an output end of the driving motor is connected to the mixing shaft for transmission through gear meshing, and a mixing gap is provided between the mixing shaft and the mixing chamber;

[0023] The inner wall of the mixing bin is provided with a thread groove;

[0024] An annular air passage is provided in the mixing chamber below the mixing shaft, the annular air passage is communicated with an air flow pump arranged on the sandblasting tube, and the annular air passage is communicated with the mixing chamber through a plurality of downwardly inclined air holes.

[0025] Further, preferably, the sand guide page 1 and the sand guide page 2 control the conveying of the first category sand and the second category sand at different speeds at different rotation speeds. When the sand guide page 1 and the sand guide page 2 are in a stationary state, the sandblasting tube is in a sandblasting shutdown stage.

[0026] Furthermore, as a preference, the first category of sand uses sand particles with lower thermal conductivity and larger heat capacity, and the second category of sand uses sand particles with moderate thermal conductivity and smaller heat capacity.

[0027] Furthermore, as a preference, an image acquisition module is provided above the interior of the sealed experimental chamber, and the image acquisition module obtains an image of the sand layer covering the surface of the photovoltaic integrated machine by taking pictures with a high-definition camera.

[0028] Further, as a preference, the photovoltaic integrated machine is tested for its heat resistance by a three-stage comparative verification method in a heat resistance experiment, wherein:

[0029] In the first stage, the photovoltaic integrated machine operates for a period of time under rated high temperature environment conditions, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period;

[0030] In the second stage, the photovoltaic integrated machine operates for a period of time under high and low temperature alternating cycle conditions, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period;

[0031] In the third stage, the photovoltaic integrated machine operates for a period of time under extreme high temperature conditions with non-uniform heating, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period.

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

[0033] The heat resistance performance verification experimental device mainly used in the present invention can provide multi-mode heat resistance verification for the photovoltaic integrated machine to be tested. Among them, the sand-covered component used can simulate the sand layer coverage of the actual photovoltaic integrated machine when it is put into use, that is, it can deduce the sand layer coverage rate on the surface of the photovoltaic integrated machine based on the dust concentration in the environment, so as to carry out heat resistance verification tests on photovoltaic integrated machines with different coverage rates, thereby verifying the performance and service life of the photovoltaic integrated machine under the environmental conditions, and improving the environmental relevance in the verification test. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the sand-covered component in the present invention;

[0036] Figure 3 It is a structural schematic diagram of the sand carrying box in the present invention;

[0037] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0038] Figure 5 It is a structural schematic diagram of the adjustment frame in the present invention;

[0039] Figure 6 A top view of the adjustment frame of the present invention;

[0040] Figure 7 It is a structural schematic diagram of the sandblasting tube in the present invention;

[0041] In the figure: 1. Experimental carrier box; 11. Light source group; 12. Rack; 13. Electric heating tube group; 14. Telescopic rod; 2. Adjustment frame; 21. Steel plate frame; 22. Structural frame; 23. Hydraulic drive arm; 24. Rotating shaft seat; 25. Connecting shaft; 26. Linear vibrator; 27. Connector; 3. Photovoltaic integrated machine; 4. Sand coating assembly; 41. Fixed bracket; 42. Guide seat; 43. Crossbeam; 44. Sand carrying box; 45. Partition; 46. Section pipe; 47. Sand pipe; 48. Sand guide page one; 5. Sandblasting pipe; 51. Flow bin; 52. Mixing bin; 53. Mixing shaft; 54. Annular airway; 55. Airflow pump; 6. Lifting part; 61. Fixed plate; 62. Brush scraper; 7. Bypass channel; 71. Sand guide page two. DETAILED DESCRIPTION

[0042] See also Figure 1-7In an embodiment of the present invention, a photovoltaic integrated machine heat resistance performance verification experimental system comprises: an experimental carrier box 1, which is provided with a sealed experimental chamber inside, the inner wall of the experimental carrier box 1 is made of high temperature resistance and high strength, an adjustment frame 2 is provided in the sealed experimental chamber, and the photovoltaic integrated machine 3 is horizontally installed on the adjustment frame 2;

[0043] The sealed experimental chamber has light source groups 11 symmetrically distributed on the upper left and right sides. The light source group 11 is composed of a plurality of solar simulators arranged in a matrix, which are used to simulate the sunlight environment. In the test, the photovoltaic integrated machine is connected to the DC side of two or more inverters to form an internal loop of the test equipment, avoiding interference and dependence on the actual power grid, and improving the independence and controllability of the test. In the 35kV internal loop line, the SHS (intelligent medium voltage breaking device) test can be added. When a short circuit fault occurs in the internal loop line, the SHS can quickly and accurately identify the fault location, isolate the fault area, prevent the fault from expanding, ensure the safety of the test equipment and personnel, shorten the test cycle, and reduce the impact on the actual power grid.

[0044] A frame 12 is fixed on the upper middle side of the sealed experimental chamber, and a guide rod is vertically slidably connected to the frame 12. The guide rods are two symmetrically distributed on the left and right. The lower ends of the two guide rods are fixed with an electric heating pipe group 13. A telescopic rod 14 is vertically fixed to the upper end of the experimental carrier box 1, and the telescopic end of the telescopic rod 14 is connected to the electric heating pipe group 13; thereby controlling the working distance between the electric heating pipe group and the photovoltaic integrated machine, and realizing heating of the surface of the photovoltaic integrated machine;

[0045] A sand covering component 4 is provided in the sealed experimental chamber, and the sand covering component 4 is horizontally overhead arranged above the adjustment frame 2. The sand covering component 4 covers the surface of the photovoltaic integrated machine 3 with a sand layer, so that sand layers with different coverage rates and different morphological distributions are formed on the photovoltaic integrated machine 3; that is, in the heat resistance verification test experiment, the sand covering component can simulate various situations in which sand and dust cover the photovoltaic integrated machine in the actual environment according to the environmental conditions of the photovoltaic integrated machine deployment environment, such as light, medium, and heavy coverage, so that researchers can conduct heat resistance verification tests on photovoltaic integrated machines with different sand layer coverage rates, and evaluate the influence of sand layer coverage on photovoltaic conversion efficiency; by observing material aging, structural deformation, electrical insulation performance, etc., evaluate the influence of sand layer coverage on the long-term stability and service life of the photovoltaic integrated machine; thereby obtaining relevant data on the environmental adaptability of the photovoltaic integrated machine, so as to facilitate subsequent accurate deployment based on the adaptation data;

[0046] The sand coating component 4 comprises:

[0047] A fixed bracket 41 is horizontally fixed on the inner wall of the experimental carrier box 1, and two guide seats 42 are slidably provided on the fixed bracket 41, and a crossbeam 43 is connected between the guide seats;

[0048] A sand loading box 44 is fixed on one side of the cross beam 43. A partition 45 is horizontally fixed in the sand loading box 44. The partition 45 divides the sand loading box 44 into two sand bins, wherein the first sand bin and the second sand bin are respectively stored.

[0049] Sandblasting tubes 5 are arranged and distributed below the sand carrying box 44. The sandblasting tubes 5 are all connected to the sand bin below. A section tube 46 is connected to the sandblasting tube 5. A sand tube 47 is provided at the upper end of the section tube 46. One end of the sand tube 47 is penetrated and fixed on the partition 45 and connected to the sand bin above. A sand guide leaf 48 is rotatably connected in the sand tube 47.

[0050] The sandblasting tube 5 mixes the first-category sand and the second-category sand in a certain proportion, and sprays the mixed sand on the surface of the photovoltaic integrated machine 3, thereby covering the surface of the photovoltaic integrated machine with a sand layer.

[0051] In this embodiment, the adjustment frame 2 includes:

[0052] A steel plate frame 21 has a connecting frame vertically fixed on one side, and a structural frame 22 is rotatably connected to the connecting frame;

[0053] The hydraulic drive arm 23 is obliquely connected to one side of the steel plate frame 21. One end of the hydraulic drive arm 23 is connected to the structural frame 22;

[0054] The rotation angle of the structural frame 22 is not greater than 90°, and a recovery channel is provided in the experimental carrier box 1 below the steel plate frame 21 for collecting and processing excess sand particles. On the one hand, the sand layer on the surface of the photovoltaic integrated machine can be removed by rotation adjustment before and after the experiment; on the other hand, the angle between the photovoltaic integrated machine and the light source group can be changed during the experiment, thereby changing the lighting simulation angle.

[0055] As a preferred embodiment, a rotating shaft seat 24 is fixed at the center of the structural frame 22, and a connecting shaft 25 is rotatably arranged in the center of the rotating shaft seat 24. One end of the connecting shaft 25 is assembled and fixed to the photovoltaic integrated machine 3. Two linear vibrators 26 are symmetrically arranged on the structural frame 22 with the rotating shaft seat 24 as the center point. One end of each linear vibrator 26 is hinged on the structural frame 22. A connector 27 is provided at the vibration end of the linear vibrator 26, and the linear vibrator 26 is rotatably connected to the photovoltaic integrated machine 3 through the connector 27. A spring group is connected between the linear vibrator 26 and the connector 27. In particular, when the sand covering component initially projects sand onto the surface of the photovoltaic integrated machine, the two linear vibrators can push the photovoltaic integrated machine to swing within a certain rotation angle range under the cooperation of telescopic means, thereby causing the sand layer on its surface to be evenly distributed along the surface under the action of vibration, reducing local accumulation and improving the uniformity of sand layer coverage.

[0056] In this embodiment, the sand covering component 4 further includes:

[0057] The lifting part 6 is vertically fixed on the cross beam 43. A fixing plate 61 is arranged parallel to the lower side of the cross beam 43. The telescopic end of the lifting part 6 is connected to the fixing plate 61.

[0058] The brush scraper 62 is installed below the fixing plate 61 .

[0059] In this embodiment, a flow bin 51 is provided above the inside of the sandblasting tube 5, the joint tube 46 is connected to the flow bin 51, a bypass channel 7 is obliquely provided on one side of the flow bin 51, the bypass channel 7 is connected to the sand bin below through an outer tube, and a sand guide leaf 71 is rotatably provided in the bypass channel 7;

[0060] A mixing chamber 52 is provided below the flow chamber in the sandblasting tube 5, a mixing shaft 53 is provided in the center of the mixing chamber 52 for rotation, a driving motor is installed on the sandblasting tube 5, the output end of the driving motor is connected to the mixing shaft 53 for transmission through gear meshing, and a mixing gap is provided between the mixing shaft 53 and the mixing chamber 52; that is, when the first-category sand and the second-category sand enter the mixing gap through the flow chamber, the first-category sand and the second-category sand are fully mixed under continuous rotation by the mixing shaft, and then ejected through the lower end of the sandblasting tube;

[0061] The inner wall of the mixing bin 52 is provided with a thread groove;

[0062] An annular air duct 54 is provided in the mixing chamber 52 below the mixing shaft 53. The annular air duct 54 is connected to an air flow pump 55 provided on the sandblasting tube 5. The annular air duct 54 is connected to the mixing chamber 52 through a plurality of downwardly inclined air holes so as to provide air flow sandblasting power to the mixed sand particles, thereby facilitating the diffusion of the sand particles on the surface of the photovoltaic integrated machine.

[0063] In this embodiment, the sand guide page 1 48 and the sand guide page 2 71 control the conveying of the first category sand and the second category sand at different speeds at different rotation speeds. When the sand guide page 1 48 and the sand guide page 2 71 are in a stationary state, the sandblasting tube 5 is in a sandblasting shutdown stage, thereby facilitating the change of the sand layer coverage distribution on the surface of the photovoltaic integrated machine.

[0064] As a preferred embodiment, the first-category sand uses sand particles with lower thermal conductivity and larger heat capacity, and the second-category sand uses sand particles with moderate thermal conductivity and smaller heat capacity. That is, the first-category sand particles have weaker heat conduction ability, indicating that the sand particles can absorb and store more heat per unit mass, while the second-category sand is the opposite. Since the first-category sand has a larger heat capacity and a relatively stronger ability to absorb and store heat, there is a difference in the surface temperature of the photovoltaic integrated machine, forming a hot spot effect (the temperature of the battery cell in the high-temperature hot spot area is much higher than the normal operating temperature), which is not conducive to maintaining stable electrical performance. Therefore, the mixing ratio between the first-category sand and the second-category sand can be adjusted to change the heat capacity and porosity of the sand layer covering the sand layer, thereby facilitating multi-environment reduction tests.

[0065] In this embodiment, an image acquisition module is provided above the interior of the sealed experimental chamber. The image acquisition module uses a high-definition camera to obtain an image of the sand layer coverage on the surface of the photovoltaic integrated machine 3, so as to accurately obtain the sand layer distribution and coverage rate based on the sand layer coverage image.

[0066] In this embodiment, the photovoltaic integrated machine 3 is tested for its heat resistance by a three-stage comparison verification method in the heat resistance experiment, wherein:

[0067] In the first stage, the photovoltaic integrated machine 3 is operated for a period of time under the rated high temperature environment conditions, and the key performance indicators of output power, current, voltage and efficiency during this period are obtained and recorded; that is, it is stored for a long time (such as 48 hours) at a constant high temperature (such as +85°C) to simulate its long-term service in a hot climate; and its durability under the rated high temperature is evaluated;

[0068] In the second stage, the photovoltaic integrated machine 3 operates for a period of time under high and low temperature alternating cycle conditions, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period; that is, it quickly switches between the set high temperature (such as +85°C) and low temperature (such as 10°C), and each temperature point is maintained for a certain time (such as 1 hour), and the number of cycles is greater than 20 times; its thermal fatigue resistance is evaluated;

[0069] In the third stage, the photovoltaic integrated machine 3 operates for a period of time under extreme high temperature environment conditions with non-uniform heating, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period; that is, the sand layer coverage rate on the surface of the photovoltaic integrated machine is changed, and it is quickly transferred to an extremely high temperature or low temperature environment in a short time (about 1 hour), and then immediately returns to normal temperature or another extreme temperature to evaluate its ability to resist sudden thermal stress.

[0070] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A photovoltaic integrated machine heat resistance performance verification experimental system, characterized by: It includes an experimental carrier box, which is provided with a sealed experimental chamber inside. The inner wall of the experimental carrier box is made of high temperature resistance and high strength. An adjustment frame is provided in the sealed experimental chamber, and the photovoltaic integrated machine is horizontally installed on the adjustment frame; The light source group is symmetrically distributed on the left and right sides of the upper part of the sealed experimental chamber. The light source group is composed of multiple solar simulators arranged in a matrix to simulate the sunlight environment. A frame is fixed on the upper side of the middle of the sealed experimental chamber, and a guide rod is vertically slidably connected to the frame. The guide rods are two symmetrically distributed on the left and right. The lower ends of the two guide rods are fixed with electric heating tube groups. A telescopic rod is vertically fixed on the upper end of the experimental carrier box, and the telescopic end of the telescopic rod is connected to the electric heating tube group. A sand covering component is provided in the sealed experimental chamber. The sand covering component is horizontally overhead and arranged above the adjustment frame. The sand covering component covers the surface of the photovoltaic integrated machine with a sand layer, so that sand layers with different coverage rates and different morphological distributions are formed on the photovoltaic integrated machine. Sand coating components include: A fixed bracket is horizontally fixed on the inner wall of the experimental carrier box, and two guide seats are slidably arranged on the fixed bracket, and a crossbeam is connected between the guide seats; The sand loading box is fixed on one side of the crossbeam. A partition is fixed horizontally in the sand loading box, and the partition divides the sand loading box into two sand bins, wherein the first sand bin and the second sand bin are respectively stored. The sandblasting tubes are arranged and distributed below the sand carrying box. The sandblasting tubes are connected to the sand bin below. A section tube is connected to the sandblasting tube. A sand tube is arranged on the upper end of the section tube. One end of the sand tube is fixed on the partition and connected to the sand bin above. A sand guide leaf is rotatably connected inside the sand tube. The sandblasting tube mixes the first-class sand and the second-class sand, and sprays the mixed sand on the surface of the photovoltaic integrated machine; A flow bin is arranged above the inside of the sandblasting tube, and the joint tube is connected with the flow bin. A bypass channel is arranged obliquely on one side of the flow bin, and the bypass channel is connected with the sand bin below through an outer tube. A second sand guide leaf is arranged in rotation in the bypass channel. A mixing chamber is provided below the flow chamber in the sandblasting tube, a mixing shaft is provided in the center of the mixing chamber for rotation, a driving motor is installed on the sandblasting tube, the output end of the driving motor is connected to the mixing shaft through gear meshing, and a mixing gap is provided between the mixing shaft and the mixing chamber; The inner wall of the mixing bin is provided with a threaded groove; An annular air passage is provided in the mixing chamber below the mixing shaft, the annular air passage is connected to an air flow pump provided on the sandblasting tube, and the annular air passage is connected to the mixing chamber through a plurality of downwardly inclined air holes; The sand guide page 1 and the sand guide page 2 control the conveying of the first category sand and the second category sand at different speeds at different rotation speeds. When the sand guide page 1 and the sand guide page 2 are in a stationary state, the sandblasting tube is in the sandblasting shutdown stage.

2. A photovoltaic integrated machine heat resistance performance verification experimental system according to claim 1, characterized in that: The adjustment frame includes: A steel plate frame, one side of which is vertically fixed with a connecting frame, and the connecting frame is rotatably connected to a structural frame; A hydraulic drive arm is obliquely connected to one side of the steel plate frame, and one end of the hydraulic drive arm is connected to the structural frame; The rotation angle of the structural frame is not greater than 90°, and a recovery channel is provided below the steel plate frame in the experimental carrier box for collecting and processing excess sand particles.

3. A photovoltaic integrated machine heat resistance performance verification experimental system according to claim 2, characterized in that: A rotating shaft seat is fixed at the center of the structural frame, and a connecting shaft is rotatably arranged in the center of the rotating shaft seat. One end of the connecting shaft is assembled and fixed to the photovoltaic integrated machine. Two linear vibrators are symmetrically arranged on the structural frame with the rotating shaft seat as the center point. One end of the linear vibrators is hinged on the structural frame. A connector is arranged at the vibration end of the linear vibrator, and is rotatably connected to the photovoltaic integrated machine through the connector. A spring group is connected between the linear vibrator and the connector.

4. A photovoltaic integrated machine heat resistance performance verification experimental system according to claim 1, characterized in that: The sand coating components also include: The lifting part is vertically fixed on the crossbeam, a fixing plate is arranged parallel to the lower part of the crossbeam, and the telescopic end of the lifting part is connected to the fixing plate; The brush scraper is installed below the fixed plate.

5. A photovoltaic integrated machine heat resistance performance verification experimental system according to claim 1, characterized in that: An image acquisition module is arranged above the interior of the sealed experimental chamber, and the image acquisition module uses a high-definition camera to take pictures to obtain the image of the sand layer covering the surface of the photovoltaic integrated machine.

6. A photovoltaic integrated machine heat resistance performance verification experimental system according to claim 1, characterized in that: The photovoltaic integrated machine adopts a three-stage comparative verification method to test its heat resistance in the heat resistance experiment, among which: In the first stage, the photovoltaic integrated machine operates for a period of time under rated high temperature environment conditions, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period; In the second stage, the photovoltaic integrated machine operates for a period of time under high and low temperature alternating cycle conditions, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period; In the third stage, the photovoltaic integrated machine operates for a period of time under extreme high temperature conditions with non-uniform heating, and obtains and records the key performance indicators of output power, current, voltage, and efficiency during this period.

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