A performance testing device for photovoltaic inverters in a grid-connected photovoltaic system

Abstract

This invention relates to the field of photovoltaic inverter testing technology and discloses a performance testing device for photovoltaic inverters in a grid-connected photovoltaic system. The device includes a base, a testing mechanism at the top of the base, a lifting mechanism fixedly connected to the bottom of the base, and a clamping mechanism fixedly connected to the top of the lifting mechanism. The operating components include a bracket fixedly connected to the top of the base, a first motor fixedly connected to the surface of the bracket, and a pole fixedly connected to the right end of the first motor. This performance testing device for photovoltaic inverters in a grid-connected photovoltaic system, through the testing mechanism, causes the support frame and connecting double rings to move up and down, ultimately driving the support base to perform continuous and regular tapping operations on the surface of the workpiece. This tapping simulates the vibration environment that a photovoltaic inverter may encounter during actual use, thereby achieving vibration detection of the workpiece to evaluate its performance under vibration conditions.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic inverter testing technology, specifically to a performance testing device for photovoltaic inverters in a grid-connected photovoltaic system. Background Technology

[0002] As a core component of photovoltaic (PV) power generation systems, the performance testing of PV inverters is crucial. PV inverter performance testing involves using specialized equipment and techniques to simulate various real-world operating conditions and comprehensively evaluate multiple performance indicators of the inverter. Testing items include efficiency testing, which measures the energy loss during the inverter's conversion of DC to AC; output power quality testing, including voltage and frequency stability and harmonic content; and mechanical stress testing of the workpiece surface.

[0003] According to the photovoltaic inverter testing device disclosed in announcement number CN208506152U, its structure includes a box, a first support column, and a solar panel. The photovoltaic inverter testing device of this utility model has a testing cabinet door. Temperature and humidity sensors are detected by a microcontroller and the temperature and humidity values ​​inside the box are transmitted to the display screen.

[0004] While this photovoltaic inverter testing device can be equipped with a heat sink and dehumidifier during workpiece testing, allowing hot air to be expelled from the vents and the air inside the chamber to remain dry to ensure testing results when the microcontroller drives the heat sink, it is not convenient to perform mechanical stress testing on the workpiece during the testing process. Therefore, the device needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to provide a performance testing device for photovoltaic inverters in a grid-connected photovoltaic system, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system, comprising a base, a testing mechanism disposed at the top of the base, a lifting mechanism fixedly connected to the bottom of the base, and a clamping mechanism fixedly connected to the top of the lifting mechanism;

[0007] The detection mechanism includes an operating component and an adjusting component, wherein the adjusting component is disposed on the surface of the operating component;

[0008] The operating component includes a bracket, which is fixedly connected to the top of the base. A first motor is fixedly connected to the surface of the bracket, and a pole is fixedly connected to the right end of the first motor. An eccentric wheel is fixedly connected to the surface of the pole. A central rod is provided inside the top of the base, and a support base is fixedly connected to the bottom of the central rod. A central rod is fixedly connected inside the support base, and a connecting double ring is fixedly connected to the top of the central rod. A support frame is fixedly connected inside the connecting double ring, and the surface of the eccentric wheel is located inside the support frame.

[0009] According to the above technical solution, a support hole is formed at the top of the support base, the surface of the central rod is slidably connected to the support hole, a circular hole is formed on the surface of the bracket, and the surface of the electric pole is rotatably connected to the circular hole. As the support frame and the connecting double rings move up and down, the support base eventually performs a continuous and regular tapping operation on the surface of the workpiece. Through this tapping, the vibration environment that the photovoltaic inverter may encounter in actual use is simulated, thereby realizing the vibration detection function of the workpiece to evaluate the performance of the workpiece under vibration conditions.

[0010] According to the above technical solution, the adjustment component includes a cross-shaped ring, which is slidably connected to the surface of a central rod. A second spring is fixedly connected between the inner ends of the cross-shaped ring and the top of the central rod. A vertical plate is fixedly connected to the front of the cross-shaped ring, and an adjustment seat is fixedly connected to the front of the vertical plate. Adjustment blocks are respectively provided on both sides of the adjustment seat. An I-shaped block is fixedly connected to the back of the adjustment block. An L-shaped rod is fixedly connected to the top of the side of the adjustment block. A connecting rod is rotatably connected to one end of the back of the L-shaped rod. A connecting block is rotatably connected to the bottom of the connecting rod. A T-shaped disk is rotatably connected to the front of the connecting block. The front of the T-shaped disk is rotatably connected to the back of the support seat. A horizontal bar is rotatably connected to the left end of the support seat. A connecting sleeve is fixedly connected to the front of the horizontal bar. A T-shaped rod is inserted into the top of the connecting sleeve. A T-shaped round rod is fixedly connected to the surface of the connecting sleeve. A slider is hinged to the top of the T-shaped round rod. A first spring is fixedly connected to the bottom of the slider. A positioning round plate is fixedly connected to the left end of the front of the support seat.

[0011] According to the above technical solution, a guide groove is opened inside the vertical plate, and the surface of the I-shaped block is slidably connected to the inside of the guide groove.

[0012] According to the above technical solution, a vertical groove is formed on the side of the adjusting block, the surface of the slider is slidably connected to the inside of the vertical groove, the bottom end of the first spring is fixedly connected to the inside of the vertical groove, slots are formed on both the surface of the adjusting seat and the surface of the adjusting block, a locking hole is formed on the surface of the positioning circular plate, and the surface of the T-shaped rod matches the inside of the locking hole. Through the transmission effect of the T-shaped plate, the two adjusting blocks are moved simultaneously. As the adjusting block moves, the contact area between it and the adjusting seat changes. According to the relationship between friction and contact area, the change in contact area will lead to a change in the magnitude of friction. In this way, the precise adjustment of vibration force according to the material and type of the workpiece can be achieved, so that the detection process can better simulate the actual use environment of the workpiece and make the detection results more realistic and reliable.

[0013] According to the above technical solution, the lifting mechanism includes a support rod, which is hinged to the bottom of the base. A base platform is hinged to the top of the support rod. L-shaped seats are fixedly connected to the front and rear of the base platform, and a U-shaped seat is slidably connected inside the L-shaped seat. A second motor is fixedly connected to the surface of the U-shaped seat. An electric shaft is fixedly connected to the back of the second motor. A gear is fixedly connected to the surface of the electric shaft, and a rack is meshed with the bottom of the gear.

[0014] According to the above technical solution, a groove is formed inside the U-shaped seat, and the surface of the rack is fixedly connected to the inside of the groove. A sliding groove is formed inside the support rod, and the surface of the U-shaped seat is slidably connected to the inside of the sliding groove. A transverse cavity is formed at the bottom of the base platform, and the surface of the electric shaft is located inside the transverse cavity. The sliding of the U-shaped seat will cause the L-shaped seat and the base platform connected to it to change in height. Through this series of mechanical transmissions, the equipment can be flexibly adjusted according to the height of the workpiece, which facilitates comprehensive and accurate performance testing of photovoltaic inverters of different heights and sizes.

[0015] According to the above technical solution, the clamping mechanism includes a vertical rod, which is fixedly connected to the top of the base platform. An L-shaped block is rotatably connected to the surface of the vertical rod. An adjusting screw is threaded inside the L-shaped block. A clamping bar is rotatably connected to one end of the adjusting screw. A limit rod is fixedly connected to the surface of the clamping bar. A T-shaped rod is inserted inside the L-shaped block. A vertical rod is inserted inside the base platform. The bottom end of the vertical rod is fixedly connected to the bottom of the base.

[0016] According to the above technical solution, an insertion hole is formed inside the L-shaped block, and a circular hole is formed on the surface of the base. The surface of the T-shaped rod is inserted into the insertion hole and the circular hole. To achieve a tight and suitable clamping of the workpiece, a fine-tuning screw is required. During the rotation of the adjusting screw, the clamping bar connected to it will move slightly. As the clamping bar moves, it gradually approaches the surface of the workpiece until it forms a stable clamping grip on the workpiece, completing the workpiece fixing operation and making full preparations for subsequent performance testing.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. The performance testing device for the photovoltaic inverter in this grid-connected photovoltaic system utilizes a detection mechanism. The rotation of the pole drives the connected eccentric wheel to rotate synchronously. During rotation, the eccentric wheel, due to its unique eccentric structure, generates periodic changes in centrifugal force. These changes cause the support frame and connecting double rings to reciprocate up and down within the support base under the guidance of the central rod. This up-and-down movement of the support frame and connecting double rings ultimately drives the support base to continuously and rhythmically strike the workpiece surface. This striking simulates the vibration environment that the photovoltaic inverter might encounter during actual use, thus achieving vibration detection of the workpiece to evaluate its performance under vibration conditions.

[0019] 2. The performance testing device for the photovoltaic inverter in this grid-connected photovoltaic system utilizes a testing mechanism where the movement of the slider drives the L-shaped rod and connecting rod, which in turn, through the transmission effect of the T-shaped disk, move two adjusting blocks simultaneously. As the adjusting blocks move, the contact area between them and the adjusting seat changes. Based on the relationship between friction and contact area, the change in contact area leads to a change in the magnitude of friction. In this way, the vibration force can be precisely adjusted according to the material and type of the workpiece, allowing the testing process to better simulate the actual usage environment of the workpiece and making the test results more realistic and reliable.

[0020] 3. The performance testing device for photovoltaic inverters in this grid-connected photovoltaic system, through a lifting mechanism, causes a U-shaped base to slide along a specific track inside a second motor as the gear moves on the rack. The sliding of the U-shaped base, in turn, causes the connected L-shaped base and base to change height. Through this series of mechanical transmissions, the equipment can be flexibly adjusted according to the height of the workpiece, facilitating comprehensive and accurate performance testing of photovoltaic inverters of different heights and sizes.

[0021] 4. The performance testing device for the photovoltaic inverter in this grid-connected photovoltaic system uses a clamping mechanism to precisely insert a T-shaped rod into the L-shaped block and the base. The insertion of the T-shaped rod achieves initial positioning of the L-shaped block, ensuring its stability during subsequent operations. At this point, to achieve a tight and suitable clamping of the workpiece, a fine-tuning screw is required. During rotation, the adjusting screw causes the connected clamping bar to move slightly. As the clamping bar moves, it gradually approaches the workpiece surface until a stable clamping effect is achieved, completing the workpiece fixation operation and preparing it for subsequent performance testing. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional view of the structure of the present invention;

[0024] Figure 2 This is a perspective view of the testing mechanism of the present invention;

[0025] Figure 3 This is a three-dimensional sectional view of the operating components of the present invention.

[0026] Figure 4 This is a perspective view of the adjustment component of the present invention;

[0027] Figure 5 This is a three-dimensional exploded view of the adjustment component parts of the present invention;

[0028] Figure 6 These are two exploded perspective views of the adjustment component parts of this invention;

[0029] Figure 7 These are three-dimensional disassembled views of the adjustment component parts of this invention;

[0030] Figure 8 Four 3D disassembled views of the adjustment component parts of this invention;

[0031] Figure 9 This is a three-dimensional exploded view of the lifting mechanism of the present invention;

[0032] Figure 10 This is a three-dimensional exploded view of the lifting mechanism parts of the present invention;

[0033] Figure 11 This is a three-dimensional exploded view of the clamping mechanism of the present invention.

[0034] In the diagram: 1. Base; 2. Detection mechanism; 21. Operating component; 211. Bracket; 212. First motor; 213. Pole; 214. Eccentric wheel; 215. Support frame; 216. Connecting double ring; 217. Center bar; 218. Support seat; 219. Center rod; 22. Adjustment component; 221. Cross ring; 222. Vertical plate; 223. Adjustment seat; 2231. I-shaped block; 224. Adjustment block; 2241. L-shaped rod; 2242. Connecting rod; 2243. Connecting block; 225. T-shaped rod; 22 51. T-shaped plate; 226. Crossbar; 2261. T-shaped round bar; 227. Slider; 2271. First spring; 228. Positioning round plate; 229. Connecting sleeve; 2291. Second spring; 3. Lifting mechanism; 31. Support rod; 32. Base platform; 33. L-shaped seat; 34. U-shaped seat; 35. Second motor; 36. Electric shaft; 37. Gear; 38. Rack; 4. Clamping mechanism; 41. Vertical rod; 42. L-shaped block; 43. Adjusting screw; 44. Clamping bar; 45. Limiting rod; 46. T-shaped bar; 47. Vertical bar. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides the following technical solutions:

[0037] Example 1

[0038] Combination Figures 2 to 11 A performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system includes a base 1, a testing mechanism 2 is provided at the top of the base 1, a lifting mechanism 3 is fixedly connected to the bottom of the base 1, and a clamping mechanism 4 is fixedly connected to the top of the lifting mechanism 3.

[0039] The detection mechanism 2 includes an operating component 21 and an adjusting component 22, with the adjusting component 22 disposed on the surface of the operating component 21;

[0040] The operating component 21 includes a bracket 211, which is fixedly connected to the top of the base 1. A first motor 212 is fixedly connected to the surface of the bracket 211. A pole 213 is fixedly connected to the right end of the first motor 212. An eccentric wheel 214 is fixedly connected to the surface of the pole 213. A central rod 217 is provided inside the top of the base 1. A support base 218 is fixedly connected to the bottom of the central rod 217. A central rod 219 is fixedly connected inside the support base 218. A connecting double ring 216 is fixedly connected to the top of the central rod 217. A support frame 215 is fixedly connected inside the connecting double ring 216. The surface of the eccentric wheel 214 is located inside the support frame 215. A support hole is opened at the top of the support base 218. The surface of the central rod 217 is slidably connected to the support hole. A circular hole is opened on the surface of the bracket 211. The surface of the pole 213 is rotatably connected to the circular hole.

[0041] Furthermore, the adjustment assembly 22 includes a cross ring 221, which is slidably connected to the surface of the central rod 219. Second springs 2291 are fixedly connected between the inner ends of the cross ring 221 and the top of the central rod 219. A vertical plate 222 is fixedly connected to the front of the cross ring 221, and an adjustment seat 223 is fixedly connected to the front of the vertical plate 222. Adjustment blocks 224 are respectively provided on both sides of the adjustment seat 223. An I-shaped block 2231 is fixedly connected to the back of the adjustment block 224, and an L-shaped rod 2241 is fixedly connected to the top of the side of the adjustment block 224. A connecting rod 2242 is rotatably connected to one end of the back of the L-shaped rod 2241, and a connecting block 2243 is rotatably connected to the bottom of the connecting rod 2242. A T-shaped disk 2251 is rotatably connected to the front of the connecting block 2243, and the front of the T-shaped disk 2251 is rotatably connected to the back of the support base 218. A horizontal bar 226 is rotatably connected to the left end of the support base 218. A connecting sleeve 229 is fixedly connected to the front of the crossbar 226. A T-shaped rod 225 is inserted into the top of the connecting sleeve 229. A T-shaped round rod 2261 is fixedly connected to the surface of the connecting sleeve 229. A slider 227 is hinged to the top of the T-shaped round rod 2261. A first spring 2271 is fixedly connected to the bottom of the slider 227. A positioning round plate 228 is fixedly connected to the left end of the front of the support seat 218. A guide groove is opened inside the vertical plate 222. The surface of the I-shaped block 2231 is slidably connected to the inside of the guide groove. A vertical groove is opened on the side of the adjusting block 224. The surface of the slider 227 is slidably connected to the inside of the vertical groove. The bottom end of the first spring 2271 is fixedly connected to the inside of the vertical groove. Slots are opened on the surface of the adjusting seat 223 and the surface of the adjusting block 224. A locking hole is opened on the surface of the positioning round plate 228. The surface of the T-shaped rod 225 matches the inside of the locking hole. During the rotation of the eccentric wheel 214, due to its special eccentric structure, a periodic change in centrifugal force will occur. This change in centrifugal force causes the support frame 215 and the connecting double rings 216 to reciprocate up and down inside the support base 218 under the guidance of the central rod 217. As the support frame 215 and the connecting double rings 216 move up and down, they ultimately drive the support base 218 to perform a continuous and regular tapping operation on the workpiece surface. This tapping simulates the vibration environment that a photovoltaic inverter might encounter during actual use, thereby achieving vibration detection of the workpiece to evaluate its performance under vibration conditions.

[0042] Example 2

[0043] See Figure 1-11 Furthermore, based on Embodiment 1, the lifting mechanism 3 further includes a support rod 31, which is hinged to the bottom of the base 1. A base platform 32 is hinged to the top of the support rod 31. An L-shaped seat 33 is fixedly connected to the front and rear of the base platform 32. A U-shaped seat 34 is slidably connected inside the L-shaped seat 33. A second motor 35 is fixedly connected to the surface of the U-shaped seat 34. An electric shaft 36 is fixedly connected to the back of the second motor 35. A gear 37 is fixedly connected to the surface of the electric shaft 36. A rack 38 is meshed with the bottom of the gear 37.

[0044] Furthermore, a groove is formed inside the U-shaped seat 34, and the surface of the rack 38 is fixedly connected to the inside of the groove. A sliding groove is formed inside the support rod 31, and the surface of the U-shaped seat 34 is slidably connected to the inside of the sliding groove. A transverse cavity is formed at the bottom of the base 32, and the surface of the electric shaft 36 is located inside the transverse cavity. As the gear 37 moves on the rack 38, it drives the U-shaped seat 34 to slide along a specific track inside the second motor 35. The sliding of the U-shaped seat 34 will in turn drive the L-shaped seat 33 and the base 32 connected to it to change height. Through this series of mechanical transmissions, the equipment can be flexibly adjusted according to the height of the workpiece, which is convenient for comprehensive and accurate performance testing of photovoltaic inverters of different heights and sizes.

[0045] Example 3

[0046] See Figure 1-11 Furthermore, based on Embodiment 1, the clamping mechanism 4 further includes a vertical rod 41, which is fixedly connected to the top of the base 32. An L-shaped block 42 is rotatably connected to the surface of the vertical rod 41. An adjusting screw 43 is threadedly connected inside the L-shaped block 42. A clamping strip 44 is rotatably connected to one end of the adjusting screw 43. A limit rod 45 is fixedly connected to the surface of the clamping strip 44. A T-shaped rod 46 is inserted inside the L-shaped block 42. A vertical rod 47 is inserted inside the base 32. The bottom end of the vertical rod 47 is fixedly connected to the bottom of the base 1.

[0047] Furthermore, an insertion hole is formed inside the L-shaped block 42, and a circular hole is formed on the surface of the base 32. The surface of the T-shaped rod 46 is inserted into the insertion hole and the circular hole. To achieve a tight and proper clamping of the workpiece, a fine-tuning screw 43 is required. During the rotation of the adjusting screw 43, it will drive the clamping bar 44 connected to it to move slightly. As the clamping bar 44 moves, it gradually approaches the surface of the workpiece until it forms a stable clamping grip on the workpiece, completing the workpiece fixing operation and making full preparation for subsequent performance testing.

[0048] In actual operation, when using this device to conduct performance testing of photovoltaic inverters, the first and crucial step is to securely clamp the photovoltaic inverter workpiece to ensure smooth and accurate subsequent testing. The specific operation process is as follows: First, carefully place the photovoltaic inverter workpiece to be tested on top of the base 32, ensuring the workpiece is centered on the testing equipment, providing a stable foundation for subsequent clamping and testing operations. Next, rotate the L-shaped block 42, gradually bringing it closer to the workpiece. When the surface of the clamping bar 44 moves to the position corresponding to the workpiece, stop rotating the L-shaped block 42. Then, precisely insert the T-shaped bar 46 into the L-shaped block 42 and the base 32. The insertion of the T-shaped bar 46 achieves initial positioning of the L-shaped block 42, ensuring its stability during subsequent operations. At this point, to achieve tight and proper clamping of the workpiece, fine-tuning the adjusting screw 43 is required. During rotation, the adjusting screw 43 will cause the connected clamping bar 44 to move slightly. As the clamping bar 44 moves, it gradually approaches the surface of the workpiece until it forms a stable clamp on the workpiece, completing the fixation operation and making full preparations for subsequent performance testing.

[0049] When entering the vibration detection stage, the equipment operates as follows: The first motor 212 starts, and its powerful output drives the pole 213 to rotate at high speed. The rotation of the pole 213 then drives the connected eccentric wheel 214 to rotate synchronously. During rotation, the eccentric wheel 214, due to its special eccentric structure, generates periodic changes in centrifugal force. This change in centrifugal force causes the support frame 215 and the connecting double ring 216 to reciprocate up and down inside the support base 218 under the guidance of the central rod 217. With the up and down movement of the support frame 215 and the connecting double ring 216, the support base 218 ultimately performs a continuous and regular tapping operation on the surface of the workpiece. Through this tapping, the vibration environment that the photovoltaic inverter may encounter during actual use is simulated, thereby achieving the vibration detection function of the workpiece to evaluate its performance under vibration conditions.

[0050] During vibration impact testing, to prevent damage to the workpiece due to excessive impact force, the equipment is equipped with corresponding protection and adjustment mechanisms. When the support seat 218 moves downward, it causes friction between the adjustment seat 223 and the surface of the adjustment block 224. This friction effectively reduces the impact force generated when the support seat 218 moves downward, thus protecting the workpiece and ensuring that it is not damaged by excessive impact during the testing process. However, different materials and types of photovoltaic inverter workpieces have different tolerances to vibration. To make the test results more realistic and accurate, the vibration force needs to be adjusted according to the specific situation of the workpiece. The specific adjustment method is as follows: First, carefully pull the T-shaped rod 225 out of the positioning circular plate 228 to release the lock on the connecting sleeve 229. Then, rotate the connecting sleeve 229. The rotation of the connecting sleeve 229 will drive the connected crossbar 226 and T-shaped circular rod 2261 to rotate synchronously. The rotation of the crossbar 226 and T-shaped circular rod 2261 will cause the slider 227 to move inside one of the adjustment blocks 224. The movement of slider 227, in turn, drives the L-shaped rod 2241 and connecting rod 2242, which, through the transmission of T-shaped disk 2251, simultaneously move the two adjusting blocks 224. As the adjusting blocks 224 move, the contact area between them and the adjusting seat 223 changes. Based on the relationship between friction and contact area, the change in contact area leads to a change in the magnitude of friction. In this way, the vibration force can be precisely adjusted according to the material and type of the workpiece, allowing the testing process to better simulate the actual usage environment of the workpiece and making the test results more realistic and reliable.

[0051] Furthermore, considering the potential differences in size and height of photovoltaic inverter workpieces during the entire testing process, the equipment also features a height adjustment function to accommodate workpieces of varying heights. When adjustment based on workpiece height is required, the second motor 35 activates. The second motor 35 drives the electric shaft 36 to rotate, which in turn drives the connected support rod 31 to rotate. The rotation of the support rod 31 causes the gear 37 fixed to it to move on the surface of the rack 38. As the gear 37 moves on the rack 38, it causes the U-shaped seat 34 to slide along a specific track inside the second motor 35. The sliding of the U-shaped seat 34, in turn, causes the connected L-shaped seat 33 and the base platform 32 to change height. Through this series of mechanical transmissions, the equipment can flexibly adjust according to the workpiece height, facilitating comprehensive and accurate performance testing of photovoltaic inverters of different heights.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system, comprising a base (1), characterized in that: The base (1) is provided with a detection mechanism (2) at the top, and a lifting mechanism (3) is fixedly connected to the bottom of the base (1). The lifting mechanism (3) is fixedly connected to a clamping mechanism (4) at the top. The detection mechanism (2) includes an operating component (21) and an adjusting component (22), wherein the adjusting component (22) is disposed on the surface of the operating component (21); The operating component (21) includes a bracket (211), which is fixedly connected to the top of the base (1). A first motor (212) is fixedly connected to the surface of the bracket (211). A pole (213) is fixedly connected to the right end of the first motor (212). An eccentric wheel (214) is fixedly connected to the surface of the pole (213). A central rod (217) is provided inside the top of the base (1). A support base (218) is fixedly connected to the bottom of the central rod (217). A central rod (219) is fixedly connected inside the support base (218). A connecting double ring (216) is fixedly connected to the top of the central rod (217). A support frame (215) is fixedly connected inside the connecting double ring (216). The surface of the eccentric wheel (214) is located inside the support frame (215). The support base (218) has a support hole at the top, the surface of the center rod (217) is slidably connected to the support hole, the bracket (211) has a circular hole on its surface, and the surface of the electric pole (213) is rotatably connected to the circular hole. The adjusting assembly (22) includes a cross ring (221), which is slidably connected to the surface of the central rod (219). A second spring (2291) is fixedly connected between the inner ends of the cross ring (221) and the top of the central rod (219). A vertical plate (222) is fixedly connected to the front of the cross ring (221). An adjusting seat (223) is fixedly connected to the front of the vertical plate (222). Adjusting blocks (224) are respectively provided on both sides of the adjusting seat (223). An I-shaped block (2231) is fixedly connected to the back of the adjusting block (224). An L-shaped rod (2241) is fixedly connected to the top of the side of the adjusting block (224). A connecting rod (2242) is rotatably connected to one end of the back of the L-shaped rod (2241). 242) A connecting block (2243) is rotatably connected to the bottom end. A T-shaped disk (2251) is rotatably connected to the front of the connecting block (2243). The front of the T-shaped disk (2251) is rotatably connected to the back of the support base (218). A crossbar (226) is rotatably connected to the left end of the support base (218). A connecting sleeve (229) is fixedly connected to the front of the crossbar (226). A T-shaped rod (225) is inserted into the top of the connecting sleeve (229). A T-shaped round rod (2261) is fixedly connected to the surface of the connecting sleeve (229). A slider (227) is hinged to the top of the T-shaped round rod (2261). A first spring (2271) is fixedly connected to the bottom of the slider (227). A positioning round plate (228) is fixedly connected to the left end of the front of the support base (218).

2. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 1, characterized in that: The vertical plate (222) has a guide groove inside, and the surface of the I-shaped block (2231) is slidably connected to the inside of the guide groove.

3. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 2, characterized in that: The adjusting block (224) has a vertical groove on its side, the surface of the slider (227) is slidably connected to the inside of the vertical groove, the bottom end of the first spring (2271) is fixedly connected to the inside of the vertical groove, the surface of the adjusting seat (223) and the surface of the adjusting block (224) both have slots, the surface of the positioning round plate (228) has a locking hole, and the surface of the T-shaped rod (225) matches the inside of the locking hole.

4. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 3, characterized in that: The lifting mechanism (3) includes a support rod (31), which is hinged to the bottom of the base (1). A base platform (32) is hinged to the top of the support rod (31). An L-shaped seat (33) is fixedly connected to the front and back of the base platform (32). A U-shaped seat (34) is slidably connected inside the L-shaped seat (33). A second motor (35) is fixedly connected to the surface of the U-shaped seat (34). An electric shaft (36) is fixedly connected to the back of the second motor (35). A gear (37) is fixedly connected to the surface of the electric shaft (36). A rack (38) is meshed with the bottom of the gear (37).

5. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 4, characterized in that: The U-shaped seat (34) has a groove inside, the surface of the rack (38) is fixedly connected to the inside of the groove, the support rod (31) has a sliding groove inside, the surface of the U-shaped seat (34) is slidably connected to the inside of the sliding groove, the bottom of the base (32) has a transverse cavity, and the surface of the electric shaft (36) is located inside the transverse cavity.

6. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 5, characterized in that: The clamping mechanism (4) includes a vertical rod (41), which is fixedly connected to the top of the base (32). An L-shaped block (42) is rotatably connected to the surface of the vertical rod (41). An adjusting screw (43) is threadedly connected inside the L-shaped block (42). A clamping bar (44) is rotatably connected to one end of the adjusting screw (43). A limit rod (45) is fixedly connected to the surface of the clamping bar (44). A T-shaped rod (46) is inserted inside the L-shaped block (42). A vertical rod (47) is inserted inside the base (32). The bottom end of the vertical rod (47) is fixedly connected to the bottom of the base (1).

7. The performance testing device for a photovoltaic inverter in a grid-connected photovoltaic system according to claim 6, characterized in that: The L-shaped block (42) has an insertion hole inside, the base (32) has a round hole on its surface, and the surface of the T-shaped rod (46) is inserted into the insertion hole and the round hole.

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