Photovoltaic linkage tracking system driving arm synchronism verification detection method

Abstract

The invention relates to the technical field of photovoltaic linkage tracking system verification, and discloses a photovoltaic linkage tracking system driving arm synchronism verification detection method, which comprises the following steps: one end of a tension line is connected to a driving beam and is attached to the end face of a first connecting flange, connected with the driving beam, of a driving arm, and the other end of the tension line is tensioned to a driven beam along the extension direction of the driving arm; a detection plate is arranged between the driving beam and the driven beam; the driving device drives the driving beam and the driven beam to rotate; overlapping the tension line with a vertical detection line on the detection plate; and the offset between the other end of the tension line and the end face of a second connecting flange connected with the driving arm and the driven beam is obtained. According to the invention, through the cooperation of the tension line and the detection plate, the offset of the driving beam and the driven beam after rotation can be accurately detected, and then the rotation synchronism of the driving beam and the driven beam is judged. The detection method is less affected by human factors, is higher in detection precision, is easy to operate dynamically, and can shorten the detection time.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic linkage tracking system verification technology, and specifically to a method for verifying and testing the synchronization of the drive arm of a photovoltaic linkage tracking system. Background Technology

[0002] Photovoltaic power generation is a core component of the new energy system and occupies a dominant position among new energy sources as the mainstream form of solar energy utilization. Large-scale photovoltaic power plants are facilities that centrally utilize solar energy. They are mostly located in places with abundant solar energy, such as wastelands and deserts. They absorb sunlight and generate direct current through multiple sets of photovoltaic modules, which are then converted into alternating current by inverters and finally connected to the power grid or used by local loads.

[0003] Photovoltaic power stations typically have multiple rows of support structures spaced at intervals. Each row can accommodate multiple sets of photovoltaic modules, forming a multi-row, multi-column array. To ensure the photovoltaic modules are as perpendicular to the sunlight as possible, maximizing solar radiation reception and improving power generation efficiency, a photovoltaic tracking system is usually included. Specifically, one of the adjacent rows of support structures is equipped with a drive device that rotates the crossbeam and the corresponding photovoltaic module. The two rows of support structures are connected by a U-shaped drive arm, which, under the action of the drive arm, drives the other set of support structures and its corresponding photovoltaic modules to rotate.

[0004] Because the distance between the two rows of supports is 6-8 meters, asynchronous operation during transmission can cause the photovoltaic modules on the driven beam to rotate out of sync, resulting in reduced power generation efficiency, power loss, and mechanical damage to the drive system. Therefore, after the drive arm is installed, it is inspected using equipment such as a right-angle ruler and laser measuring instrument. However, this inspection method involves adjusting the tracking system angle to find a specific reference plane, is time-consuming, and its accuracy is affected by human factors, resulting in low efficiency and large errors. Summary of the Invention

[0005] In view of this, the present invention provides a method for verifying and detecting the synchronization of the drive arm of a photovoltaic linkage tracking system, in order to solve the problems of long detection time, accuracy affected by human factors, low detection efficiency and large error in existing photovoltaic linkage tracking system drive arm detection methods.

[0006] In a first aspect, the present invention provides a method for verifying and detecting the synchronization of a drive arm in a photovoltaic linkage tracking system, comprising:

[0007] One end of the tensioning wire is connected to the active beam and attached to the end face of the first connecting flange that connects the drive arm to the active beam; the other end is tensioned to the driven beam along the extension direction of the drive arm.

[0008] A detection plate is positioned between the active beam and the driven beam.

[0009] The driving device drives the driving beam and the driven beam to rotate;

[0010] The tensioning line is coincided with the vertical detection line on the detection plate;

[0011] The offset between the other end of the tensioning line and the end face of the second connecting flange where the driving arm and the driven beam are connected is obtained.

[0012] Advantages

[0013] Through the cooperation of the tensioning line and the detection plate, the offset after the rotation of the driving beam and the driven beam can be accurately obtained, and the rotation synchronization of the driving beam and the driven beam can be judged. This detection method is less affected by human factors, has high detection efficiency, can realize dynamic detection, and is easy to operate. It can ensure that the rotation synchronization of the photovoltaic module is high, thereby effectively improving the power generation efficiency, reducing the energy and mechanical loss of the tracking system, and reducing the failure rate.

[0014] In an optional embodiment, after the step of obtaining the offset between the other end of the tensioning line and the end face of the second connecting flange where the driving arm and the driven beam are connected, the method further comprises: calculating an offset angle according to the offset.

[0015] In an optional embodiment, the offset angle is calculated by the formula: where Δθ is the offset angle, Δd is the offset, and L is the distance from the driving beam to the driven beam.

[0016] Advantages

[0017] Through the formula calculation, the offset obtained directly can be converted into an offset angle, and the synchronous deviation of the rotation of the driving beam and the driven beam can be more accurately understood.

[0018] In an optional embodiment, between the step of setting the detection plate between the driving beam and the driven beam and the step of driving the driving beam and the driven beam by the driving device, the method further comprises:

[0019] The driving device drives the driving beam and the driven beam to rotate to a reference state, and in the reference state, the photovoltaic module arranged on the driving beam and the driven beam is parallel to the ground.

[0020] In an optional embodiment, in the step of driving the driving beam and the driven beam by the driving device, the rotation angle of the driving beam and the driven beam is ±55°.

[0021] In an optional embodiment, in the step of coinciding the tensioning line with the vertical detection line on the detection plate, the coincidence state of the tensioning line and the vertical detection line is recognized by a camera.

[0022] Advantages

[0023] The camera recognition is more accurate and precise, and the detection accuracy is higher.

[0024] In an optional embodiment, the tensioning wire is further connected to a tension sensor.

[0025] In an optional embodiment, a plurality of the vertical detection lines are arranged at intervals on the detection plate.

[0026] In an optional embodiment, the interval of the vertical detection lines is 1-5 mm.

[0027] In an optional embodiment, a clamping groove is formed at one end of the detection plate, and the detection plate is adapted to be abutted to the driven beam at both ends of the second connecting flange through the clamping groove.

[0028] Advantages

[0029] By forming the clamping groove on the detection plate and stably arranging the detection plate, the detection work is facilitated, and the error is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0031] Figure 1 The shaft side view of the detection plate of the embodiment of the present application is arranged in the photovoltaic linkage tracking system.

[0032] Figure 2 The top view of the detection plate of the embodiment of the present application is arranged in the photovoltaic linkage tracking system.

[0033] Figure 3 The front view of the detection plate of the embodiment of the present application is arranged in the photovoltaic linkage tracking system.

[0034] Figure 4 The installation top view of the detection plate and the tensioning wire of the embodiment of the present application is arranged in the photovoltaic linkage tracking system.

[0035] Figure 5 The shaft side view of the photovoltaic linkage tracking system of the embodiment of the present application.

[0036] Figure 6 The schematic view of the detection plate of the embodiment of the present application.

[0037] Reference numerals:

[0038] 1. tensioning wire;

[0039] 2. driving arm, 21, first connecting flange, 22, second connecting flange;

[0040] 3. driving beam;

[0041] 4. driven beam;

[0042] 5. detection plate, 51, vertical detection line;

[0043] 6. driving device. DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0048] The embodiments of the present application will be described below in conjunction with Figures 1 to 6 .

[0049] According to an embodiment of the present application, in one aspect, a photovoltaic linkage tracking system driving arm synchronism verification detection method is provided, comprising:

[0050] The tensioning wire 1 is connected to the driving beam 3 at one end and adheres to the end face of the first connecting flange 21 connecting the driving arm 2 and the driving beam 3, and is tensioned to the driven beam 4 along the extension direction of the driving arm 2 at the other end;

[0051] Specifically, the distance between two adjacent rows of supports in a photovoltaic power station can reach 6-8m. Each row of supports includes a main beam and a plurality of columns, the plurality of columns are fixedly arranged on the ground, the main beam is assembled on the columns, and the main beam can be provided with a cross beam and a photovoltaic module. One of the two adjacent main beams is provided with a driving device 6, and this main beam is referred to as the driving beam 3, and the other is referred to as the driven beam 4. The driving device 6 generally includes a driving motor and a speed reducer, the power output by the driving motor is transmitted to the driving beam 3 through the speed reducer to drive the driving beam 3 to rotate. The driving beam 3 and the driven beam 4 are connected through the driving arm 2, the driving arm 2 includes a horizontal rod and two vertical rods, the upper ends of the two vertical rods are respectively provided with the first connecting flange 21 and the second connecting flange 22, the first connecting flange 21 is connected with the driving beam 3, the second connecting flange 22 is connected with the driven beam 4, and the lower ends of the two vertical rods are hingedly connected with the two ends of the horizontal rod through hinges. The driving arm 2 can realize power transmission, and when the driving device 6 drives the driving beam 3 to rotate, the driven beam 4 will also rotate.

[0052] One end of the tensioning wire 1 is connected to the driving beam 3 and adheres to one end face of the first connecting flange 21, and the other end is tensioned from one side of the driving beam 3 to the other side of the driven beam 4 along the extension direction of the driving arm 2.

[0053] The detection plate 5 is arranged between the driving beam 3 and the driven beam 4;

[0054] The material of the detection plate 5 is not specifically limited in the embodiment, and the detection plate 5 is preferably a wooden board, so that a vertical detection line 51 can be drawn on the wooden board. The plate body of the detection plate 5 is flat, and is arranged between the driving beam 3 and the driven beam 4 in parallel to the ground, and close to the side of the driven beam 4.

[0055] The driving device 6 drives the driving beam 3 and the driven beam 4 to rotate;

[0056] After the tensioning wire 1 and the detection plate 5 are arranged, the detection work can be started. The driving device 6 is started, and the output power drives the driving beam 3 and the driven beam 4 to rotate by a certain angle, and then the synchronism of the driving beam 3 and the driven beam 4 is detected.

[0057] The tensioning wire 1 coincides with the vertical detection line 51 on the detection plate 5;

[0058] The vertical detection line 51 on the detection plate 5 is perpendicular to the driving beam 3 and the driven beam 4, so that the superposition of the tension cable 1 and the vertical detection line 51 also indicates that the tension cable 1 is perpendicular to the driving beam 3 and the driven beam 4. If the driving beam 3 and the driven beam 4 rotate completely synchronously, the end faces on the same side of the first connecting flange 21 and the second connecting flange 22 are coplanar, that is, the line between the two end faces is parallel to the tension cable 1 / vertical detection line 51. If the driving beam 3 and the driven beam 4 rotate asynchronously, a deviation will occur between the first connecting flange 21 and the second connecting flange 22, that is, the line between the two end faces is not parallel to the tension cable 1 / vertical detection line 51.

[0059] The offset between the other end of the tension cable 1 and the end face of the second connecting flange 22 connected to the driven beam 4 of the driving arm 2 is obtained.

[0060] The distance between the position of the tension cable 1 on the driven beam 4 and the end face of the second connecting flange 22 is measured to obtain the offset. The size of the offset can reflect the difference in synchronism between the driving beam 3 and the driven beam 4. The larger the offset, the worse the synchronism, and vice versa.

[0061] This detection method directly displays the deviation value when the driving beam 3 and the driven beam 4 rotate by setting the tension cable 1 and the detection plate 5, can accurately judge the synchronism between the driving beam 3 and the driven beam 4, is less affected by human factors, has high detection efficiency, and is easy to operate dynamically. Subsequently, according to the detection result, the staff can timely adjust the driving arm 2 to ensure high synchronism of the photovoltaic module rotation, thereby effectively improving the power generation efficiency, reducing the energy, mechanical loss and failure rate of the tracking system.

[0062] In one embodiment, the tension cable 1 is also connected to a tension sensor.

[0063] The tension sensor is a device for measuring the tension (tension) of an object. When the tension cable 1 is subjected to tension, the elastic element (such as strain gauge, spring, piezoelectric crystal, etc.) inside the tension sensor will deform. This deformation is converted into an electrical signal (voltage, current or resistance change), which is then processed and amplified by subsequent circuitry to ultimately obtain a value corresponding to the tension, standardizing the detection operation process.

[0064] In one embodiment, a plurality of vertical detection lines 51 are arranged at intervals on the detection plate 5.

[0065] In one embodiment, the interval of the vertical detection line 51 is 1-5 mm.

[0066] The detection plate 5 is provided with a plurality of vertical detection lines 51 at equal intervals, and the interval is 1-5 mm. In this embodiment, the interval between adjacent vertical detection lines 51 is 1 mm.

[0067] In other embodiments, the spacing between adjacent vertical detection lines 51 can also be 1.5 mm, 2 mm, 5 mm, etc., and the present embodiment is not specifically limited.

[0068] In one embodiment, one end of the detection plate 5 is provided with a clamping groove, and the detection plate 5 is adapted to abut to the driven beam 4 at both ends of the second connecting flange 22 through the clamping groove.

[0069] As shown in Figure 6 , one end of the detection plate 5 is provided with a rectangular clamping groove, so that the detection plate 5 is more convenient to abut on the driven beam 4 to keep stable.

[0070] In other embodiments, the end of the plate body on both sides of the clamping groove of the detection plate 5 can be provided with a sharp end, which is adapted to abut with the driven beam 4.

[0071] In one embodiment, the detection plate 5 is arranged between the driving beam 3 and the driven beam 4, and the driving device 6 drives the driving beam 3 and the driven beam 4 to rotate. The step further comprises:

[0072] The driving device 6 drives the driving beam 3 and the driven beam 4 to rotate to a reference state, and the photovoltaic module arranged on the driving beam 3 and the driven beam 4 is parallel to the ground in the reference state.

[0073] That is, a reference setting step is arranged before detection, the photovoltaic module is adjusted to 0° state (i.e. parallel to the ground), and the tensioning wire 1 is coincided with the vertical detection line 51 on the detection plate 5, which is recorded as the initial coincided state.

[0074] In one embodiment, in the step of driving the driving beam 3 and the driven beam 4 to rotate, the rotation angle of the driving beam 3 and the driven beam 4 is ±55°.

[0075] In one embodiment, in the step of coinciding the tensioning wire 1 with the vertical detection line 51 on the detection plate 5, the coincidence state of the tensioning wire 1 and the vertical detection line 51 is recognized by the camera.

[0076] Since the spacing of the vertical detection line 51 on the detection plate 5 is small, the observation accuracy of the naked eye is low, so the camera is used for assistance to realize the standardization of the detection process and the more accurate result.

[0077] In one embodiment, after the step of obtaining the offset between the other end of the tensioning wire 1 and the end face of the second connecting flange 22 connected with the driven beam 4 of the driving arm 2, the step further comprises: calculating the offset angle according to the offset.

[0078] In one embodiment, the offset angle is calculated by the formula: , wherein Δθ is the offset angle, Δd is the offset, and L is the distance between the driving beam 3 and the driven beam 4.

[0079] According to the offset, the offset angle can be converted by using trigonometric function. Specifically, as shown in FIG. 17, the line connecting the first connecting flange 21 and the second connecting flange 22 on the same side end face, and the line connecting the other end of the tensioning wire 1 and the end face of the second connecting flange 22 can form a triangle with the tensioning wire 1, wherein the offset angle is calculated by the formula: Figure 4 After the detection is completed, the staff can adjust the driving arm 2.

[0080] And such detection can be carried out in stages, such as quarterly, semi-annually or annual retesting. Ensure that the photovoltaic power station is in an efficient power generation state.

[0081] The photovoltaic linkage tracking system driving arm synchronicity verification detection method is suitable for the synchronicity detection of the 6-8m driving arm 2, the offset error can be optimized from ±10cm of the traditional detection method to ±1cm, the offset angle error can be optimized from ±1° of the traditional detection method to ±0.1°, and the detection accuracy is greatly improved. At the same time, the detection time is also shortened to about three minutes. Taking a 100MW photovoltaic power station as an example, after being detected and adjusted by the detection method, the annual power generation gain is more than 1 million degrees, which has good economic benefits.

[0082] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.​

Claims

1. A method for verifying and detecting the synchronization of a drive arm in a photovoltaic linkage tracking system, characterized in that, The tensioning wire (1) is connected to the driving beam (3) at one end and is attached to the end surface of the first connecting flange (21) where the driving arm (2) is connected to the driving beam (3), and is tensioned to the driven beam (4) along the extension direction of the driving arm (2); A detection plate (5) is arranged between the driving beam (3) and the driven beam (4); The driving device (6) drives the driving beam (3) and the driven beam (4) to rotate; The tensioning wire (1) is aligned with the vertical detection line (51) on the detection plate (5); The offset between the other end of the tensioning wire (1) and the end surface of the second connecting flange (22) where the driving arm (2) is connected to the driven beam (4) is obtained. After the step of obtaining the offset between the other end of the tensioning wire (1) and the end surface of the second connecting flange (22) where the driving arm (2) is connected to the driven beam (4), the step of calculating the offset angle according to the offset is further included.

2. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 1, characterized in that, Between the steps of arranging the detection plate (5) between the driving beam (3) and the driven beam (4) and driving the driving beam (3) and the driven beam (4) to rotate by the driving device (6), further includes:

3. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 2, characterized in that, The offset angle is calculated by the formula: where Δθ is the offset angle, Δd is the offset, and L is the distance from the master beam (3) to the slave beam (4).

4. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 1, characterized in that, The driving device (6) drives the driving beam (3) and the driven beam (4) to rotate to a reference state, and in the reference state, the photovoltaic module arranged on the driving beam (3) and the driven beam (4) is parallel to the ground. In the step of driving the driving beam (3) and the driven beam (4) to rotate by the driving device (6), the rotation angle of the driving beam (3) and the driven beam (4) is ±55°.

5. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 4, characterized in that, In the step of aligning the tensioning wire (1) with the vertical detection line (51) on the detection plate (5), the alignment state of the tensioning wire (1) and the vertical detection line (51) is recognized by a camera.

6. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 1, characterized in that, The tensioning wire (1) is also connected to a tension sensor.

7. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 1, characterized in that, A plurality of vertical detection lines (51) are arranged on the detection plate (5) at intervals.

8. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 1, characterized in that, The interval of the vertical detection line (51) is 1-5mm.

9. The photovoltaic linkage tracking system drive arm synchronism verification detection method according to claim 8, characterized in that, One end of the detection plate (5) is provided with a clamping groove, and the detection plate (5) is adapted to abut to the driven beam (4) at both ends of the second connecting flange (22) through the clamping groove.

10. The photovoltaic linked tracking system drive arm synchronicity verification detection method according to claim 1, wherein, ​

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