A distributed photovoltaic grid-connected testing method and equipment

Abstract

The present invention discloses a distributed photovoltaic grid-connected test method and equipment, the equipment comprising: a box body, a cover body, a test assembly, a wiring assembly, and a transmission assembly. The method comprises moving the box body to a distributed photovoltaic grid-connected test position and opening the cover body; when the cover body is opened, the transmission assembly performs a mutual rotation between the components, driving the test assembly to move upward, and moving the test assembly to a first preset position; the test assembly at the first preset position performs a mutual movement between the components, controls the deployment angle of the test assembly, and deploys the test assembly to a preset angle in the box body; adjusts the wiring assembly to a preset wiring position, and connects the test equipment to the grid-connected inverter through the wiring assembly; starts the test assembly at the preset angle, and tests the waveform of the grid-connected inverter through the test assembly to obtain test data. This embodiment improves the ventilation effect and overall integration effect during testing, and improves the connection adaptability when wiring multiple harnesses.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic grid-connected testing, and in particular to a distributed photovoltaic grid-connected testing method and equipment. Background Art

[0002] Photovoltaic (PV) generally refers to photovoltaic power generation systems, or simply PV. These systems utilize the photovoltaic effect of photovoltaic cells to directly convert solar radiation into electricity. Distributed PV grid-connected systems are characterized by the direct distribution of generated electricity to loads. Excess or insufficient power is regulated through connection to the larger power grid, and power exchange with the larger grid can be bidirectional. Grid-connected distributed PV systems require grid-connected testing of the grid current after the inverter to improve operational safety.

[0003] Traditional grid-connected testing requires wiring testing using a grid-connected tester. The test equipment commonly used in existing technologies is large and cannot be moved. Furthermore, the test equipment takes up a lot of space, and stacking them in a box affects heat dissipation efficiency, resulting in inaccurate testing. Summary of the Invention

[0004] The present invention provides a distributed photovoltaic grid-connected testing method and equipment, which realizes the distributed photovoltaic grid-connected testing, improves the ventilation effect and overall integration effect during the test, and improves the connection adaptability when wiring multiple wiring harnesses.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a distributed photovoltaic grid-connected testing method, comprising:

[0006] The test method is performed on a test device, wherein the test device includes: a box body, a cover body, a test assembly, a wiring assembly, and a transmission assembly;

[0007] The box body is connected to the cover body, the box body is connected to the test assembly, the test assembly is connected to the transmission assembly, the transmission assembly is connected to the cover body, the transmission assembly is connected to the box body, the wiring assembly is connected to the test assembly, and the wiring assembly is connected to the box body;

[0008] Test methods include:

[0009] Move the box to the distributed photovoltaic grid-connected test position and open the cover;

[0010] When the cover is opened, the transmission assembly rotates the components to move the test assembly upward to the first preset position.

[0011] The test assembly at the first preset position is used to move between the components to control the deployment angle of the test assembly and deploy the test assembly to a preset angle in the box body;

[0012] Adjust the wiring assembly to the preset wiring position, and connect the test equipment to the grid-connected inverter through the wiring assembly;

[0013] Start the test component with a preset angle, test the waveform of the grid-connected inverter through the test component, and obtain test data.

[0014] In implementing the embodiment of the present invention, the test equipment is moved to the test position of the distributed photovoltaic grid-connected system and the cover is opened; when the cover is opened, the components are rotated with each other through the transmission assembly to drive the connected test assembly to move upward and move to the first preset position; the test assembly at the first preset position is used to move the components with each other to control the deployment angle of the test assembly and deploy the test assembly to the preset angle in the box; the wiring assembly is adjusted to the preset wiring position, and the test equipment is connected to the grid-connected inverter through the wiring assembly, and the test assembly is opened; the test assembly at the preset angle is started, and the waveform of the grid-connected inverter is tested through the test assembly to obtain test data. The waveform of the grid-connected inverter during distributed photovoltaic grid connection is tested, and the spacing between the boxes is controlled by the retractable test assembly table, which is beneficial to improving the ventilation effect and the overall integration effect during the deployment test, and the portability and passability during the grid-connected test are improved by the corresponding test method of the test equipment, while the connection adaptability during multi-wiring harness wiring is improved.

[0015] As a preferred solution, the transmission assembly is used to rotate the components to drive the test assembly upward and move the test assembly to the first preset position, specifically:

[0016] The transmission assembly includes a triangular plate, an abutment block, a slide bar, a connecting plate, a driving rack and a driven gear;

[0017] When the cover is opened, the triangular plate is squeezed by the abutment block, and the abutment block drives the slide rod to move. The movement of the slide rod drives the connecting plate at the bottom to move. The movement of the connecting plate drives the active rack and the driven gear on one side to rotate. The rotation of the driven gear drives the driven rack to move upward. The driven rack drives the connected test assembly to move upward, and moves the test assembly to the first preset position.

[0018] As a preferred solution, the test assembly at the first preset position is used to move between the components to control the deployment angle of the test assembly, and deploy the test assembly to the preset angle in the box body, specifically:

[0019] The test assembly includes a test display screen, a rear connecting rod, a movable screw seat and an adjusting screw;

[0020] When the test assembly is moved to the first preset position, the test display screen is unfolded by flipping the rear connecting rod and rotating it around the movable screw seat. When the test display screen is unfolded, the adjusting screw is turned to rotate. The rotation of the adjusting screw drives the threaded movable screw seat to move. The movement of the movable screw seat drives the top test display screen to move. The unfolding angle of the test display screen is adjusted to unfold the test assembly to the preset angle in the box.

[0021] As a preferred solution, adjust the wiring assembly to a preset wiring position, specifically:

[0022] The wiring assembly includes a pull-limit spring and a wiring slot seat;

[0023] The wiring slot seat is moved by pulling the limiting spring piece, and the wiring slot seat is slidably adjusted to a preset wiring position through the sliding groove.

[0024] By implementing the embodiment of the present invention, a wiring assembly is designed, and the wiring slot seat of the rear connection is driven to adjust the corresponding position by pulling the limiting spring piece, which is conducive to quickly adjusting the wiring position, and the wiring operation can improve the sliding stability in the slide groove through the sliders on both sides, avoiding shaking and deviation during the wiring operation.

[0025] As a preferred solution, the waveform of the grid-connected inverter is tested by a test component to obtain test data, specifically:

[0026] The built-in software of the test component is used to determine the AC power harmonic waveform of the grid-connected inverter and obtain test data.

[0027] In order to solve the same technical problem, an embodiment of the present invention further provides a distributed photovoltaic grid-connected test device, comprising: a box body, a cover body, a test assembly, a wiring assembly, a transmission assembly, a control keyboard and a control module;

[0028] The box body is connected to the cover body, the box body is connected to the test assembly, the test assembly is connected to the transmission assembly, the transmission assembly is connected to the cover body, the transmission assembly is connected to the box body, the wiring assembly is connected to the test assembly, the wiring assembly is connected to the box body, the box body is connected to the control module, and the control keyboard is connected to the box body;

[0029] The control module is used to execute the distributed photovoltaic grid-connected test method.

[0030] As a preferred solution, the outer wall of the box body is connected to the cover body through a pin hinge, the cover body is clamped to one side of the box body through a locking piece, the inner cavity of the box body is slidably connected to the test component, one side of the test component is connected to the cover body through a transmission component, the transmission component is arranged on one side of the inner cavity of the box body, and a wiring component is arranged on the outside of the box body, and the wiring component and the test component are connected through a power cable.

[0031] As a preferred solution, the transmission assembly includes a triangular plate, an abutment block, a slide rod, a connecting block, a connecting plate, a slider, a driving rack, a driven gear, a corrugated cover and a spring;

[0032] Among them, the triangular plate is fixedly connected to the bottom of the cover body, the bottom inclined surface of the triangular plate is connected to the abutment block fixedly arranged on the top of the slide rod, the outer wall of the slide rod is slidably connected to the slider, one side of the slider is fixedly connected to the connecting block, the connecting block is fixedly connected to the groove body on one side of the outer wall of the box body, the bottom end of the slide rod is fixedly connected to the connecting plate, the top side of the connecting plate is fixedly connected to the active rack, one side of the active rack is meshed with the driven gear, the driven rack is fixedly connected to the bottom of the test assembly, one side of the connecting block is fixedly connected to the corrugated cover, and the two ends of the corrugated cover are respectively fixedly connected to both sides of the groove body cavity of the box body, the outer wall of the slide rod is provided with a spring, one end of the spring is fixedly connected to the top of the slider, and the other end of the spring is fixedly connected to the bottom of the abutment block.

[0033] As a preferred solution, the control module includes a moving module, a rotating module, an unfolding module, a wiring module and a testing module;

[0034] The moving module is used to move the box to the distributed photovoltaic grid-connected test position and open the cover;

[0035] The rotation module is used to rotate the components mutually through the transmission component when the cover is opened, thereby driving the test component to move upward and move the test component to the first preset position;

[0036] The unfolding module is used to perform the mutual movement between components through the test component at the first preset position, control the unfolding angle of the test component, and unfold the test component to a preset angle in the box body;

[0037] The wiring module is used to adjust the wiring assembly to a preset wiring position and connect the test equipment to the grid-connected inverter through the wiring assembly;

[0038] The test module is used to start the test component of the preset angle, test the waveform of the grid-connected inverter through the test component, and obtain test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 : A schematic flow chart of an embodiment of a distributed photovoltaic grid-connected testing method provided by the present invention;

[0040] Figure 2 : A front view of a test device according to an embodiment of a distributed photovoltaic grid-connected test method provided by the present invention;

[0041] Figure 3 : A right view of a test device according to an embodiment of a distributed photovoltaic grid-connected test method provided by the present invention;

[0042] Figure 4 : A side right view of a test device according to an embodiment of a distributed photovoltaic grid-connected test method provided by the present invention;

[0043] Figure 5 : A diagram of a transmission component of an embodiment of a distributed photovoltaic grid-connected testing method provided by the present invention;

[0044] Figure 6 : A test component diagram of an embodiment of a distributed photovoltaic grid-connected test method provided by the present invention;

[0045] Figure 7 : A wiring assembly diagram of an embodiment of a distributed photovoltaic grid-connected testing method provided by the present invention;

[0046] Figure 8 : A wiring assembly diagram of an embodiment of a distributed photovoltaic grid-connected testing device provided by the present invention;

[0047] Figure 9 : An exploded view of the test equipment of an embodiment of a distributed photovoltaic grid-connected test method provided by the present invention;

[0048] The accompanying drawings in the specification are numerals as follows:

[0049] 1 is the box body, 2 is the cover body, 3 is the test assembly, 301 is the test display screen, 302 is the connecting rod, 303 is the movable screw seat, 304 is the linear module, 305 is the adjusting screw, 306 is the test table, 4 is the wiring assembly, 401 is the sealing gasket, 402 is the connecting coil, 403 is the slide groove, 404 is the first slider, 405 is the slide hole, 406 is the wiring slot seat, 407 is the limit spring, 408 is the connecting Wire sleeve, 5 is the transmission assembly, 501 is the sliding rod, 502 is the second sliding block, 503 is the connecting block, 504 is the corrugated cover, 505 is the first spring, 506 is the abutment block, 507 is the triangular plate, 508 is the active rack, 509 is the driven gear, 510 is the fixed plate, 511 is the driven rack, 512 is the telescopic rod, 513 is the second spring, 514 is the connecting plate, 6 is the control keyboard, and 7 is the control module. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] Example 1

[0052] Please refer to Figure 1 , which is a flow chart of a distributed photovoltaic grid-connected testing method provided by an embodiment of the present invention. The testing method of this embodiment is applicable to distributed photovoltaic grid-connected testing. This embodiment tests the waveform of the grid-connected inverter during distributed photovoltaic grid-connected testing, improves the ventilation effect and overall integration effect during testing, and improves the connection adaptability when wiring multiple wiring harnesses. The testing method includes steps 101 to 105, each of which is specifically as follows:

[0053] Step 101: Move the box body 1 to a distributed photovoltaic grid-connected test position and open the cover body 2.

[0054] Optionally, the testing method is performed on a testing device, wherein the testing device includes: a box body 1, a cover body 2, a test assembly 3, a wiring assembly 4, and a transmission assembly 5; wherein the box body 1 is connected to the cover body 2, the box body 1 is connected to the test assembly 3, the test assembly 3 is connected to the transmission assembly 5, the transmission assembly 5 is connected to the cover body 2, the transmission assembly 5 is connected to the box body 1, the wiring assembly 4 is connected to the test assembly 3, and the wiring assembly 4 is connected to the box body 1;

[0055] In this embodiment, the front view of the test device is as follows: Figure 2 As shown, the right side view of the test equipment is as follows: Figure 3 As shown, the side right view of the test equipment, such as Figure 4 As shown, the test equipment includes: a box body 1, a cover body 2, a test component 3, a wiring component 4 and a transmission component 5, and also includes a control keyboard 6. When performing a grid-connected test, the box body 1 is moved to the grid-connected test position, and the cover body 2 can be opened around the rear pin shaft in the test equipment.

[0056] Step 102: When the cover 2 is opened, the transmission assembly 5 performs a mutual rotational action between the components, driving the test assembly 3 to move upward, and moving the test assembly 3 to the first preset position.

[0057] Optionally, step 102 is specifically as follows: the transmission assembly 5 includes a triangular plate 507, an abutment block 506, a slide bar 501, a connecting plate 514, an active rack 508 and a driven gear 509; when the cover body 2 is opened, the triangular plate 507 is forced to squeeze the abutment block 506, and the abutment block 506 is forced to drive the slide bar 501 to move, and the movement of the slide bar 501 drives the connecting plate 514 at the bottom to move, and the movement of the connecting plate 514 drives the active rack 508 and the driven gear 509 on one side to rotate, and the driven gear 509 rotates to drive the driven rack to move upward, and the driven rack drives the connected test assembly 3 to move upward, and moves the test assembly 3 to the first preset position.

[0058] In this embodiment, when the cover 2 is opened, the transmission assembly starts to work, as shown in FIG. Figure 5As shown, the triangular plate 507 on the rear side can be subjected to force to squeeze the bottom abutment block 506, and the abutment block 506 can be subjected to force to drive the slide bar 501 to move, and the movement of the slide bar 501 can drive the bottom connecting plate 514 to move, and the movement of the connecting plate 514 can drive the active rack 508 and the driven gear 509 on one side to rotate, and the rotation of the driven gear 509 can drive the driven rack 511 to move upward, and the driven rack 511 can drive the connected test component 3 to move upward.

[0059] Step 103 : The test component 3 at the first preset position is moved between components to control the deployment angle of the test component 3 , and deploy the test component 3 in the box body 1 to a preset angle.

[0060] Optionally, step 103 is specifically as follows: the test component 3 includes a test display screen, a rear connecting rod, a movable screw seat and an adjusting screw; when the test component 3 is moved to the first preset position, the test display screen 301 is unfolded by flipping the rear connecting rod around the movable screw seat 303, and when the test display screen 301 is unfolded, the adjusting screw 305 is rotated by twisting the adjusting screw 305, and the rotation of the adjusting screw 305 drives the threaded movable screw seat 303 to move, and the movement of the movable screw seat 303 drives the top test display screen 301 to move, and the unfolding angle of the test display screen 301 is adjusted to unfold the test component 3 to the preset angle in the box body 1.

[0061] In this embodiment, the test component diagram, such as Figure 6 As shown, by flipping the test display screen 301, the rear connecting rod 302 is rotated and unfolded around the movable screw seat 303. When the adjusting screw 305 is moved by twisting, the adjusting screw 305 rotates to drive the threaded movable screw seat 303 to move, and the movable screw seat 303 can drive the top test display screen 301 to move, and the unfolding angle of the test display screen 301 is unfolded and adjusted, and the test assembly 3 is unfolded to a preset angle in the box body 1. When the test display screen 301 is fully unfolded, test observation is performed.

[0062] Step 104: Adjust the wiring assembly 4 to a preset wiring position, and connect the test equipment to the grid-connected inverter through the wiring assembly.

[0063] Optionally, the wiring assembly 4 is adjusted to a preset wiring position, specifically: the wiring assembly 4 includes a pull-limiting spring piece 407 and a wiring slot seat 406; the wiring slot seat 406 is driven to move by pulling the limit spring piece 407, and the wiring slot seat 406 is slid and adjusted to the preset wiring position through the slide groove 403.

[0064] In this embodiment, the wiring assembly diagram, such as Figure 7As shown, after the test assembly 3 is deployed through the box body 1, the limiting spring 407 is pulled to adjust the corresponding position of the wiring slot 406 on the rear side of the connection, which facilitates the adjustment of the wiring position. The wiring operation can improve the sliding stability within the slide 403 through the first sliders 404 on both sides, preventing the wiring operation from shaking or deviating. The wiring slot 406 is adjusted to the preset wiring position to adjust to the optimal wiring position. After connecting the wiring assembly 4 on one side to the grid-connected inverter, the test assembly 3 is opened and ready for testing.

[0065] Step 105: Start the test component 3 at a preset angle, test the waveform of the grid-connected inverter through the test component 3, and obtain test data.

[0066] Optionally, the waveform of the grid-connected inverter is tested by the test component 3 to obtain test data, specifically: the AC power harmonic waveform of the grid-connected inverter is determined by the built-in software of the test component 3 to obtain the test data.

[0067] In this embodiment, the software in the test component 3 determines the harmonic waveform of the AC power supply of the grid-connected inverter and obtains test data. After the test is completed, the test data is uploaded, and the cover 2 and the box body 1 are closed to complete the test.

[0068] In the embodiment of the present invention, the box body 1 is moved to the grid-connected test position. The cover body 2 is opened around the rear pin. When the cover body 2 is opened, the triangular plate 507 connected to the rear side can be pressed against the bottom abutment block 506. The abutment block 506 can be forced to drive the slide bar 501 to move. The movement of the slide bar 501 can drive the bottom connecting plate 514 to move. The movement of the connecting plate 514 can drive the active rack 508 and the driven gear 509 on one side to rotate. The rotation of the driven gear 509 can drive the driven rack 511 to move upward. The driven rack 511 can drive the connected test assembly 3 to move upward. The box body spacing can be regulated by the retractable test table 306. The waveform of the grid-connected inverter during distributed photovoltaic grid connection is tested. The retractable test assembly table can be used to regulate the box body spacing, which is beneficial to improving ventilation and overall integration during the test. The corresponding test method of the test equipment improves the portability and passability during grid-connected testing, and improves the connection adaptability when wiring multiple wiring harnesses.

[0069] Example 2

[0070] Accordingly, see Figure 8 , Figure 8 This is a connection diagram of a second embodiment of a distributed photovoltaic grid-connected test device provided by the present invention. Figure 8As shown, the distributed photovoltaic grid-connected test equipment includes a box body 1, a cover body 2, a test assembly 3, a wiring assembly 4, a transmission assembly 5, a control keyboard 6, and a control module 7. The box body 1 is connected to the cover body 2, the box body 1 is connected to the test assembly 3, the test assembly 3 is connected to the transmission assembly 5, the transmission assembly 5 is connected to the cover body 2, the transmission assembly 5 is connected to the box body 1, the wiring assembly 4 is connected to the test assembly 3, the wiring assembly 4 is connected to the box body 1, the box body 1 is connected to the control module 7, and the control keyboard 6 is connected to the box body 1. The control module 7 is used to execute the distributed photovoltaic grid-connected test method.

[0071] Optionally, the outer wall of the box body 1 is connected to the cover body 2 through a pin hinge, the cover body 2 is clamped to one side of the box body 1 through a locking piece, the inner cavity of the box body 1 is slidably connected to the test component 3, one side of the test component 3 is connected to the cover body 2 through a transmission component 5, the transmission component 5 is arranged on one side of the inner cavity of the box body 1, and a wiring component 4 is arranged on the outside of the box body 1, and the wiring component 4 is connected to the test component 3 through an electrical cable.

[0072] In this embodiment, the outer wall of the box body 1 is hinged to the cover body 2 via a pin, and the cover body 22 is snapped onto the side of the box body 1 via a locking member. The inner cavity of the box body 11 is slidably connected to the test assembly 3. A transmission assembly 5 is connected between one side of the test assembly 33 and the cover body 2. The transmission assembly 55 is provided on one side of the inner cavity of the box body 1. A wiring assembly 4 is provided on one side of the box body 11. The wiring assembly 44 is connected to the test assembly 3 via a power cable. For ease of display, the test equipment is disassembled for observation. The disassembled diagram of the test equipment is shown in FIG. Figure 9 shown.

[0073] Optionally, the transmission assembly 5 includes a triangular plate 507, an abutment block 506, a slide bar 501, a connecting block 503, a connecting plate 514, a slider (a second slider 502), an active rack 508, a driven gear 509, a corrugated cover 504 and a spring (a first spring 505); wherein, the triangular plate 507 is fixedly connected to the bottom of the cover body 2, the bottom inclined surface of the triangular plate 507 is connected to the abutment block 506 fixedly provided at the top of the slide bar 501, the outer wall of the slide bar 501 is slidably connected to the second slider 502, one side of the second slider 502 is fixedly connected to the connecting block 503, and the connecting block 503 is fixedly connected to the groove body on one side of the outer wall of the box body 1 Inside, the bottom end of the slide rod 501 is fixedly connected to the connecting plate 514, and one side of the top of the connecting plate 514 is fixedly connected to the active rack 508. One side of the active rack 508 is meshed with the driven gear 509, and the driven rack 511 is fixedly connected to the bottom of the test component 3. One side of the connecting block 503 is fixedly connected to the corrugated cover 504, and the two ends of the corrugated cover 504 are respectively fixedly connected to the two sides of the inner cavity of the groove of the box body 1. The outer wall of the slide rod 501 is provided with a spring (first spring 505), one end of the first spring 505 is fixedly connected to the top of the second slider 502, and the other end of the first spring 505 is fixedly connected to the bottom of the abutment block 506.

[0074] In this embodiment, if Figure 5 As shown, the transmission assembly 55 includes a triangular plate 507 and a slide bar 501. The triangular plate 507 is fixedly connected to one side of the bottom of the cover body 2, and the bottom inclined surface of the triangular plate 507 contacts the abutment block 506 fixedly provided at the top of the slide bar 501. The outer wall of the slide bar 501 is slidably connected to the second slider 502. One side of the second slider 502 is fixedly connected to the connecting block 503. The connecting block 503 is fixedly connected to the groove body on one side of the outer wall of the box body 1. The bottom end of the slide bar 501 is fixedly connected to the connecting plate 514. The top side of the connecting plate 514 is fixedly connected to the active rack 508. The active rack A driven gear 509 is engaged with one side of 508, and a driven rack 511 is engaged with one side of the driven gear 509. The driven rack 511 is fixedly connected to the bottom of the test component 3. A corrugated cover 504 is fixedly connected to one side of the connecting block 503. Both ends of the corrugated cover 504 are respectively fixedly connected to the two sides of the inner cavity of the groove on one side of the inner cavity of the box body 1, and the corrugated cover 504 is an elastic plastic cover. The outer wall of the sliding rod 501501 is provided with a first spring 505. One end of the first spring 505 is fixedly connected to the top of the second slider 502, and the top of the first spring 505 is fixedly connected to the bottom of the abutment block 506.

[0075] Optionally, the control module 7 includes a moving module, a rotating module, an unfolding module, a wiring module and a testing module;

[0076] The moving module is used to move the box body 1 to the distributed photovoltaic grid-connected test position and open the cover body 2;

[0077] The rotation module is used to rotate the components through the transmission component 5 when the cover 2 is opened, so as to drive the test component 3 to move upward and move the test component 3 to the first preset position;

[0078] The unfolding module is used to perform the mutual movement between components through the test component 3 at the first preset position, control the unfolding angle of the test component 3, and unfold the test component 3 to a preset angle in the box body 1;

[0079] The wiring module is used to adjust the wiring assembly 4 to a preset wiring position and connect the test equipment to the grid-connected inverter through the wiring assembly;

[0080] The test module is used to start the test component 3 at a preset angle, and test the waveform of the grid-connected inverter through the test component 3 to obtain test data.

[0081] By implementing the embodiment of the present invention, the spacing between the boxes can be regulated by means of the retractable test table 306, which is beneficial to improving the ventilation effect and the overall integration effect during the test. In addition, the above-mentioned test scheme can improve the portability and passability during the grid-connected test, and at the same time improve the connection adaptability during multi-wiring harness wiring. By means of the designed wiring assembly 4, the wiring slot seat 406 on the rear side is driven to adjust the corresponding position by pulling the limiting spring piece 407, which is beneficial to quickly adjust the wiring position. In addition, the wiring operation can improve the sliding stability in the slide groove 403 through the first sliders 404 on both sides, thereby avoiding shaking and deviation during the wiring operation.

[0082] The above specific embodiments further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention for those skilled in the art.

Claims

1. A distributed photovoltaic grid-connected testing method, characterized in that: include: The test method is performed on a test device, wherein the test device comprises: a box body, a cover body, a test assembly, a wiring assembly and a transmission assembly; The box body is connected to the cover body, the box body is connected to the test assembly, the test assembly is connected to the transmission assembly, the transmission assembly is connected to the cover body, the transmission assembly is connected to the box body, the wiring assembly is connected to the test assembly, and the wiring assembly is connected to the box body; The test method includes: Moving the box to a distributed photovoltaic grid-connected test position and opening the cover; When the cover is opened, the transmission assembly rotates the components to move the test assembly upward to a first preset position. The test assembly in the first preset position is used to perform mutual movement between components to control the deployment angle of the test assembly and deploy the test assembly to a preset angle in the box body, wherein the test assembly includes a test display screen, a rear connecting rod, a movable screw seat and an adjusting screw; when the test assembly is moved to the first preset position, the rear connecting rod is flipped and rotated around the movable screw seat so that the test display screen is deployed; after the test display screen is deployed, the adjusting screw is rotated by twisting the adjusting screw, and the rotation of the adjusting screw drives the threaded movable screw seat to move, and the movement of the movable screw seat drives the test display screen at the top to move, thereby adjusting the deployment angle of the test display screen and deploying the test assembly to the preset angle in the box body; The wiring assembly is adjusted to a preset wiring position, and the test equipment is connected to the grid-connected inverter through the wiring assembly, wherein the wiring assembly is adjusted to the preset wiring position in the following manner: the wiring assembly includes a pull-limiting spring piece and a wiring slot seat; the pull-limiting spring piece is used to drive the wiring slot seat to move, and the wiring slot seat is slidably adjusted to the preset wiring position through the slide groove; The test component of the preset angle is started, and the waveform of the grid-connected inverter is tested by the test component to obtain test data.

2. The distributed photovoltaic grid-connected testing method according to claim 1, characterized in that: The mutual rotation between the components is performed by the transmission component to drive the test component to move upward, and the test component is moved to the first preset position, specifically: The transmission assembly includes a triangular plate, an abutment block, a sliding rod, a connecting plate, a driving rack, a driven rack and a driven gear; When the cover is opened, the triangular plate is forced to squeeze the abutment block, and the abutment block is forced to drive the slide bar to move, and the movement of the slide bar drives the connecting plate at the bottom to move, and the movement of the connecting plate drives the active rack and the driven gear on one side to rotate, and the rotation of the driven gear drives the driven rack to move upward, and the driven rack drives the connected test assembly to move upward, and moves the test assembly to the first preset position.

3. The distributed photovoltaic grid-connected testing method according to claim 1, characterized in that: The waveform of the grid-connected inverter is tested by the test component to obtain test data, specifically: The test data is obtained by determining the AC power harmonic waveform of the grid-connected inverter through the software built into the test component.

4. A distributed photovoltaic grid-connected testing device, characterized in that: include: Box body, cover body, test assembly, wiring assembly, transmission assembly, control keyboard and control module; The box body is connected to the cover body, the box body is connected to the test assembly, the test assembly is connected to the transmission assembly, the transmission assembly is connected to the cover body, the transmission assembly is connected to the box body, the wiring assembly is connected to the test assembly, the wiring assembly is connected to the box body, the box body is connected to the control module, and the control keyboard is connected to the box body; The control module is used to execute the distributed photovoltaic grid-connected testing method according to any one of claims 1 to 3.

5. The distributed photovoltaic grid-connected testing equipment according to claim 4, characterized in that: The outer wall of the box body is connected to the cover body through a pin hinge, and the cover body is clamped to one side of the box body through a locking piece. The inner cavity of the box body is slidably connected to the test component, and one side of the test component is connected to the cover body through the transmission component. The transmission component is arranged on one side of the inner cavity of the box body, and the wiring assembly is arranged on the outside of the box body. The wiring assembly is connected to the test assembly through an electrical cable.

6. The distributed photovoltaic grid-connected testing equipment according to claim 4, characterized in that: The transmission assembly includes a triangular plate, an abutment block, a sliding rod, a connecting block, a connecting plate, a slider, a driving rack, a driven rack, a driven gear, a corrugated cover and a spring; wherein the triangular plate is fixedly connected to the bottom of the cover body, the bottom inclined surface of the triangular plate is connected to the abutment block fixedly arranged on the top of the slide rod, the outer wall of the slide rod is slidably connected to the slider, one side of the slider is fixedly connected to the connecting block, and the connecting block is fixedly connected to the groove body on one side of the outer wall of the box body, the bottom of the slide rod is fixedly connected to the connecting plate, one side of the top of the connecting plate is fixedly connected to the active rack, one side of the active rack is meshed with the driven gear, and the driven rack is fixedly connected to the bottom of the test assembly, one side of the connecting block is fixedly connected to the corrugated cover, and the two ends of the corrugated cover are respectively fixedly connected to the two sides of the groove body cavity of the box body, the outer wall of the slide rod is sleeved with the spring, one end of the spring is fixedly connected to the top of the slider, and the other end of the spring is fixedly connected to the bottom of the abutment block.

7. The distributed photovoltaic grid-connected testing equipment according to claim 4, characterized in that: The control module includes a moving module, a rotating module, an unfolding module, a wiring module and a testing module; The moving module is used to move the box body to a distributed photovoltaic grid-connected test position and open the cover body; The rotation module is used to rotate the components mutually through the transmission assembly when the cover is opened, thereby driving the test assembly to move upward and move the test assembly to a first preset position; The unfolding module is used to perform mutual movement between components through the test component in the first preset position, control the unfolding angle of the test component, and unfold the test component to a preset angle in the box body, wherein the test component includes a test display screen, a rear connecting rod, a movable screw seat and an adjusting screw; when the test component is moved to the first preset position, the rear connecting rod is flipped and rotated around the movable screw seat so that the test display screen is unfolded. After the test display screen is unfolded, the adjusting screw is rotated by twisting the adjusting screw, and the rotation of the adjusting screw drives the threaded movable screw seat to move. The movement of the movable screw seat drives the test display screen at the top to move, and the unfolding angle of the test display screen is adjusted, so that the test component is unfolded to the preset angle in the box body; The wiring module is used to adjust the wiring assembly to a preset wiring position, and connect the test equipment to the grid-connected inverter through the wiring assembly, wherein the wiring assembly is adjusted to the preset wiring position in detail as follows: the wiring assembly includes a pull-limiting spring piece and a wiring slot seat; the wiring slot seat is driven to move by pulling the limit spring piece, and the wiring slot seat is slidably adjusted to the preset wiring position through the slide groove; The test module is used to start the test component at the preset angle, and test the waveform of the grid-connected inverter through the test component to obtain test data.

Images