Shadow shielding detection device and photovoltaic power generation equipment

Abstract

The utility model relates to a shadow shielding detection device and photovoltaic power generation equipment, the shadow shielding detection device comprises a moving track, a moving assembly and a photosensitive sensor, the moving track is arranged around a photovoltaic array, the photosensitive sensor is arranged on the moving assembly, and the moving assembly can move along the moving track. Therefore, the photosensitive sensor can carry out shadow shielding detection corresponding to different positions around the photovoltaic array. According to the shadow shielding detection device and the photovoltaic power generation equipment, the photosensitive sensor is driven by the moving assembly to move to different positions around the corresponding photovoltaic array along the moving track, so that shadow shielding detection on different positions around the photovoltaic array by the photosensitive sensor is realized; the situation that a part of areas cannot be detected due to a detection blind area is avoided, and then the detection accuracy is improved; and photosensitive sensors do not need to be arranged at different positions around the photovoltaic array, so that the arrangement number of the photosensitive sensors is reduced, and the detection cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a shadow occlusion detection device and photovoltaic power generation equipment. Background Art

[0002] Photovoltaic arrays may be shadowed during power generation applications. This shadowing reduces the area of ​​the PV array receiving sunlight, thereby reducing the array's power generation efficiency. Traditional PV power generation equipment does not monitor shadowing of the PV array; instead, it attempts to mitigate shadowing during the design phase. However, due to complex site conditions, design surveys often cannot completely mitigate shadowing. Therefore, temporary shadowing testing of the PV array is necessary during project operation.

[0003] However, the temporary detection method used in related technologies typically involves placing sensors at specific points on the photovoltaic array to perform detection at these locations. This method requires a large number of sensors, resulting in high detection costs and hindering cost reduction. Reducing the number of sensors also results in some areas being left undetected, thus affecting detection accuracy. Utility Model Content

[0004] Based on this, the present application provides a shadow occlusion detection device and a photovoltaic power generation device to solve the technical problem of how to reduce the number of photosensitive sensors while improving detection accuracy.

[0005] On the one hand, the present application provides a shadow occlusion detection device, which is suitable for performing shadow occlusion detection on a photovoltaic array. The shadow occlusion detection device includes a movable track, a movable component and a photosensitive sensor. The movable track is arranged around the photovoltaic array, and the photosensitive sensor is arranged on the movable component. The movable component can move along the movable track, so that the photosensitive sensor can perform shadow occlusion detection corresponding to different positions around the photovoltaic array.

[0006] In one embodiment, the moving component includes a walking wheel and a motor, the photosensor is provided on the walking wheel, the motor is connected to the walking wheel, and the motor can drive the walking wheel to rotate so that the walking wheel moves along the moving track.

[0007] In one embodiment, the moving component includes a walking wheel, a motor and a moving seat, the photosensor is arranged on the moving seat, the walking wheel is rotatably connected to the moving seat, the motor is connected to the walking wheel, and the motor can drive the walking wheel to rotate so that the walking wheel moves along the moving track, so that the moving seat moves along the moving track with the photosensor.

[0008] In one embodiment, the movable track is provided with a track groove, at least a portion of the structure of the motor is located in the track groove, and when the motor drives the running wheel to rotate, the running wheel moves along the track groove.

[0009] In one embodiment, the motor can drive the traveling wheel to rotate forward and can drive the traveling wheel to rotate reverse.

[0010] In one embodiment, the movable track is arranged in a rectangular shape and surrounds the photovoltaic array, or the movable track is arranged in a circular shape and surrounds the photovoltaic array.

[0011] In one embodiment, the shadow occlusion detection device also includes a data processing module, which is electrically connected to the photosensor. The data processing module is used to process the data detected by the photosensor to determine whether there is a shadow occlusion at the position of the photovoltaic array corresponding to the photosensor.

[0012] In one embodiment, the material of the movable track includes metal, plastic or composite material.

[0013] In one embodiment, the light-sensitive sensor comprises a photoresistor sensor.

[0014] On the other hand, the present application provides a photovoltaic power generation device, including a photovoltaic array and a shadow occlusion detection device as described above, wherein the photovoltaic array includes a frame and a plurality of photovoltaic cells, wherein the plurality of photovoltaic cells are installed in an array on the frame, and the movable track is arranged on the frame along the edge of the photovoltaic array.

[0015] The aforementioned shadow obstruction detection device and photovoltaic power generation equipment, because the movable track is arranged around the circumference of the photovoltaic array, and the movable assembly can move along the movable track, the photosensors on the movable assembly can detect different positions around the corresponding photovoltaic array, thereby eliminating the need to set photosensors at different positions around the photovoltaic array, thereby reducing the number of photosensors set and lowering detection costs. Moreover, in the shadow obstruction detection device of the present application, the photosensors move along the movable track with the movable assembly to different positions around the corresponding photovoltaic array, avoiding detection blind spots that may cause some areas to be undetectable, thereby improving detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0017] Figure 1 Schematic diagram of the local structure of a shadow obstruction detection device corresponding to the corner position of a photovoltaic array according to one embodiment.

[0018] Figure 2 Schematic diagram of the structure of a moving component in a shadow occlusion detection device according to one embodiment of the present application.

[0019] Figure 3 This is a structural schematic diagram of a moving component in a shadow occlusion detection device according to another embodiment of the present application.

[0020] Figure 4 This is a schematic diagram of a path where a photosensor moves clockwise from an initial position around a photovoltaic array when a shadow obstruction detection device according to an embodiment of the present application performs shadow detection.

[0021] Figure 5 This is a schematic diagram of a path where a photosensor moves counterclockwise from an initial position around a photovoltaic array when a shadow obstruction detection device according to an embodiment of the present application performs shadow detection.

[0022] Description of reference numerals:

[0023] 10. Shadow detection device; 101. Starting position; 11. Moving track; 111. Track groove; 12. Moving assembly; 121. Traveling wheel; 122. Motor; 123. Moving seat; 13. Photosensor; 20. Photovoltaic array; 21. Column. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0027] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0030] Combine Figure 1 As shown, a shadow shading detection device 10 provided in an embodiment of the present application is suitable for performing shadow shading detection on a photovoltaic array 20 to provide detection support for subsequent power generation analysis, research, and improvement of shadow shading.

[0031] Shadow detection device 10 includes a movable track 11, a movable assembly 12, and a photosensor 13. The movable track 11 is disposed around the perimeter of a photovoltaic array 20. The photosensor 13 is mounted on the movable assembly 12. The movable assembly 12 is movable along the movable track 11, enabling the photosensor 13 to detect shadows at various locations around the photovoltaic array 20.

[0032] In the above-described embodiment, since the movable track 11 is arranged around the periphery of the photovoltaic array 20 and the movable assembly 12 is capable of moving along the movable track 11, the light sensor 13 on the movable assembly 12 can detect different positions around the photovoltaic array 20. This eliminates the need to install light sensors 13 at different positions around the photovoltaic array 20, thereby reducing the number of light sensors 13 installed and lowering detection costs. Moreover, in the shadow obstruction detection device 10 of the present application, the light sensor 13 moves along the movable track 11 with the movable assembly 12 to different positions around the corresponding photovoltaic array 20, avoiding detection blind spots that may cause some areas to be undetectable, thereby improving detection accuracy.

[0033] Combine Figure 2As shown, the mobile component 12 includes a walking wheel 121 and a motor 122. The photosensor 13 is provided on the walking wheel 121, and the motor 122 is connected to the walking wheel 121. The motor 122 can drive the walking wheel 121 to rotate so that the walking wheel 121 moves along the moving track 11. In this embodiment, the photosensor 13 is provided on the walking wheel 121, so that when the walking wheel 121 moves along the moving track 11, the photosensor 13 also moves along the moving track 11 to perform shadow occlusion detection on different positions around the photovoltaic array 20. Since the photosensor 13 is provided on the walking wheel 121, the consistency of the position of the photosensor 13 and the walking wheel 121 is ensured, which is conducive to improving the moving position of the photosensor 13 by accurately realizing the walking position of the walking wheel 121 by controlling the motor 122, thereby improving the detection accuracy.

[0034] It should be noted that the light sensor 13 is not limited to being arranged on the walking wheel 121, but may also be arranged on other structures. Figure 3 As shown, in some embodiments, the mobile assembly 12 includes a mobile seat 123, a running wheel 121 and a motor 122. The photosensor 13 is provided on the mobile seat 123, the running wheel 121 is rotatably connected to the mobile seat 123, and the motor 122 is connected to the running wheel 121. The motor 122 can drive the running wheel 121 to rotate so that the running wheel 121 moves along the mobile track 11, so that the mobile seat 123 moves along the mobile track 11 with the photosensor 13. In this embodiment, the running wheel 121 rotates under the drive of the motor 122, so that the mobile seat 123 moves along the mobile track 11. Since the photosensor 13 is provided on the mobile seat 123, the photosensor 13 can move along the mobile track 11 together with the mobile seat 123, and then the photosensor 13 can move to different positions around the corresponding photovoltaic array 20 to perform shadow occlusion detection.

[0035] The location and orientation of the photosensor 13 are not limited here. As long as the moving assembly 12 moves along the moving track 11 and can move the photosensor 13 to different locations around the corresponding photovoltaic array 20, the photosensor 13 can perform shadow occlusion detection.

[0036] The moving component 12 is not limited to moving the walking wheel 121 to realize the movement of the photosensor 13 along the moving track 11. For example, in some embodiments, the moving component 12 includes a conveyor belt, a mounting member, and a driving member. The conveyor belt is arranged along the moving track 11. The photosensor 13 is connected to the conveyor belt through the mounting member. The driving member is used to drive the conveyor belt to move so that the conveyor belt drives the mounting member and the photosensor 13 to move along the moving track 11. It should be noted that the conveyor belt can be mounted on a plurality of rolling wheels arranged along the moving track 11, and the plurality of rolling wheels define the moving path of the conveyor belt driving the mounting member to guide the movement of the conveyor belt. In this embodiment, the principle of the conveyor belt moving along the moving track 11 to drive the photosensor 13 to move around the photovoltaic array 20 is similar to the principle of the cable-pulling cable car to move in a circular motion, which will not be elaborated here. The driving member includes but is not limited to a rotary motor or a servo motor.

[0037] See again Figure 1 As shown, in some embodiments, the movable track 11 is provided with a track groove 111, and at least a portion of the structure of the motor 122 is located in the track groove 111. When the motor 122 drives the running wheel 121 to rotate, the running wheel 121 moves along the track groove 111. In this embodiment, since at least a portion of the structure of the motor 122 is located in the track groove 111 of the movable track 11, the volume of the portion of the movable component 12 protruding from the movable track 11 is reduced, thereby facilitating the maintenance of the cleanliness around the photovoltaic array 20 and reducing the obstruction of the photovoltaic array 20 by the movable component 12 itself. In this way, the power generation efficiency of the photovoltaic array 20 is not affected by the shadow obstruction detection device 10.

[0038] It should be noted that, combined with Figure 4 As shown, the moving assembly 12 can enable the light sensor 13 to move clockwise around the photovoltaic array 20. Figure 5 As shown, the mobile component 12 can also enable the photosensor 13 to move counterclockwise around the photovoltaic array 20, so that the photosensor 13 can take a round-trip approach to perform shadow occlusion detection on different positions around the photovoltaic array 20, thereby improving the accuracy of the detection results. Specifically, in the shadow occlusion detection device 10 of the present application, the motor 122 can drive the running wheel 121 to rotate forward, and can drive the running wheel 121 to rotate reversely. Thus, by using the motor 122 to drive the running wheel 121 to rotate forward, the mobile component 12 can move the photosensor 13 clockwise along the moving track 11 around the photovoltaic array 20; correspondingly, by using the motor 122 to drive the running wheel 121 to rotate reversely, the mobile component 12 can move the photosensor 13 counterclockwise along the moving track 11 around the photovoltaic array 20.

[0039] The starting position 101 where the light sensor 13 performs shadow shading detection on the photovoltaic array 20 may be any position around the photovoltaic array 20 and is not limited here.

[0040] For ease of understanding, the shadow blocking detection process is described below by taking the middle position of the upper edge of the photovoltaic array 20 as the starting position 101 as an example, but this does not limit the working process of the shadow blocking detection device 10 of the present application.

[0041] In some embodiments, the photosensor 13 moves clockwise from a starting position 101 along the movable track 11 around the photovoltaic array 20, performing shadow detection while moving, thereby obtaining shadow conditions at corresponding locations around the photovoltaic array 20. After the photosensor 13 completes a circle around the photovoltaic array 20, it returns to the starting position 101. Since the photosensor 13 completes a circle around the photovoltaic array 20 during this shadow detection process, it can be considered a single-circle detection. Accordingly, the photosensor 13 can also perform a single-circle detection by moving counterclockwise from the starting position 101 around the photovoltaic array 20. This allows shadow detection to be performed at any location around the photovoltaic array 20, improving the accuracy of the detection results and requiring only one photosensor 13. Of course, during the shadow detection process, the photosensor 13 can first perform a single-circle detection counterclockwise, followed by a single-circle detection counterclockwise. Thus, the two single-circle detections can be considered a double-circle detection. Accordingly, the light sensor 13 can perform single-circle detection in clockwise and counterclockwise directions alternately, thereby achieving a cyclic and repeated detection effect. The working process of the shadow occlusion detection device 10 will not be described in detail here.

[0042] In some embodiments, multiple moving assemblies 12 can be configured on the movable track 11 to enable movement of multiple photosensors 13, thereby improving detection efficiency. Furthermore, the movement of the photosensors 13 along the movable track 11 enables shadow detection at different locations around the photovoltaic array 20. This improves detection accuracy while reducing the number of photosensors 13 required, thereby reducing costs while improving detection accuracy. The number of moving assemblies 12 and photosensors 13 is not limited herein and can be one, two, or three.

[0043] The movable track 11 can be a single-piece ring structure or a ring structure formed by joining multiple track segments, as long as the movable track 11 can accommodate the movable assembly 12 carrying the photosensor 13 to perform shadow detection at different locations around the photovoltaic array 20. In some embodiments, the movable track 11 is arranged in a rectangular shape around the photovoltaic array 20, so that the movement path of the photosensor 13 when it circles around the photovoltaic array 20 is rectangular. In some embodiments, the movable track 11 is arranged in a circular shape around the photovoltaic array 20, so that the movement path of the photosensor 13 when it circles around the photovoltaic array 20 is circular.

[0044] The material of the moving track 11 includes but is not limited to metal, plastic or composite material.

[0045] In some embodiments, the shadow occlusion detection device 10 further includes a data processing module, which is electrically connected to the photosensor 13. The data processing module is used to process the data detected by the photosensor 13 to determine whether a shadow is blocking the position of the photovoltaic array 20 corresponding to the photosensor 13. In this embodiment, the data detected by the photosensor 13 includes the light intensity sensed by the photosensor 13 when performing shadow occlusion detection around the photovoltaic array 20, thereby obtaining information related to the light intensity. It is understandable that the light intensity at a position not blocked by a shadow is weaker than the light intensity at a position blocked by a shadow. Therefore, the data processing module can determine whether a shadow is blocking the corresponding position by performing data processing and analysis on the light intensity.

[0046] In some embodiments, the data processing module can be a computer with a built-in calculation program. The photosensor 13 and the data processing module can be connected via an RS-485 signal line to facilitate remote data transmission. This allows the data processing module to be located in a control room remote from the photovoltaic array 20. RS-485 is a communication interface for remote data acquisition. When communication distances range from tens of meters to thousands of meters, the RS-485 serial bus standard is used. RS-485 utilizes balanced transmission and differential reception, thus suppressing common-mode interference.

[0047] The light sensor 13 includes, but is not limited to, a photoresistor sensor. A photoresistor sensor has the advantages of small size, high sensitivity, stable performance, and low price. The photoresistor in a photoresistor sensor is a junctionless (PN junction) device. When the incident light is strong, the resistance of the photoresistor decreases significantly; when the incident light becomes weaker, the resistance of the photoresistor increases significantly. Thus, the photoresistor sensor can provide feedback on light intensity through the size of its resistance, thereby enabling shadow occlusion detection.

[0048] Another embodiment of the present application provides a photovoltaic power generation device comprising a photovoltaic array 20 and the aforementioned shadow detection device 10. The photovoltaic array 20 comprises a frame and a plurality of photovoltaic cells, which are mounted in an array on the frame. A movable track 11 is provided on the frame along the edge of the photovoltaic array 20. In this embodiment, the movable track 11 is provided by utilizing the frame on which the photovoltaic cells are mounted. This eliminates the need for a separate mounting structure, and allows the shadow detection device 10 to be mounted around the photovoltaic array 20, thereby simplifying the structural design.

[0049] Since the shadow occlusion detection device 10 of the present application not only reduces the number of photosensitive sensors 13, but also avoids detection blind spots that cause some areas to be unable to be detected, the photovoltaic power generation equipment including the shadow occlusion detection device 10 can realize shadow occlusion detection of the photovoltaic array 20 at a low cost and with high detection accuracy.

[0050] It should be noted that the movable track 11 and the frame can be connected by welding, or by a detachable connection method such as bolt connection or clamping. When the movable track 11 and the frame are detachably connected, the installation and removal of the movable track 11 can meet the requirements of assembling and removing the shadow obstruction detection device 10 around the photovoltaic array 20, thereby improving the convenience of use.

[0051] In some embodiments, a plurality of columns 21 are connected to the bottom of the frame so that the frame can be supported by the columns 21 , so that the frame can stably support the photovoltaic array 20 and the shadow obstruction detection device 10 .

[0052] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments merely illustrate several implementation methods of the present application, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the inventive concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A shadow occlusion detection device (10), suitable for performing shadow occlusion detection on a photovoltaic array (20), characterized in that: The shadow occlusion detection device (10) comprises a moving track (11), a moving component (12) and a photosensitive sensor (13), wherein the moving track (11) is arranged around the photovoltaic array (20), the number of the photosensitive sensor (13) is one and the photosensitive sensor (13) is arranged on the moving component (12), and the moving component (12) is movable along the moving track (11) so that the photosensitive sensor (13) can perform shadow occlusion detection at different positions around the photovoltaic array (20), and the shadow occlusion detection device (10) further comprises a data processing module, wherein the data processing module is electrically connected to the photosensitive sensor (13), and the data processing module is used to process data detected by the photosensitive sensor (13) to determine whether a shadow occlusion exists at a position of the photovoltaic array (20) corresponding to the photosensitive sensor (13).

2. The shadow occlusion detection device (10) according to claim 1, characterized in that: The moving assembly (12) comprises a walking wheel (121) and a motor (122); the light-sensitive sensor (13) is arranged on the walking wheel (121); the motor (122) is connected to the walking wheel (121); and the motor (122) can drive the walking wheel (121) to rotate so that the walking wheel (121) moves along the moving track (11).

3. The shadow occlusion detection device (10) according to claim 1, characterized in that: The moving assembly (12) comprises a walking wheel (121), a motor (122) and a moving seat (123); the light-sensitive sensor (13) is arranged on the moving seat (123); the walking wheel (121) is rotatably connected to the moving seat (123); the motor (122) is connected to the walking wheel (121); the motor (122) can drive the walking wheel (121) to rotate so that the walking wheel (121) moves along the moving track (11), so that the moving seat (123) moves along the moving track (11) with the light-sensitive sensor (13).

4. The shadow occlusion detection device (10) according to claim 2 or 3, characterized in that: The movable track (11) is provided with a track groove (111), at least a portion of the structure of the motor (122) is located in the track groove (111), and when the motor (122) drives the running wheel (121) to rotate, the running wheel (121) moves along the track groove (111).

5. The shadow occlusion detection device (10) according to claim 2 or 3, characterized in that: The motor (122) can drive the running wheel (121) to rotate forward, and can drive the running wheel (121) to rotate reverse.

6. The shadow occlusion detection device (10) according to claim 1, characterized in that: The movable track (11) is arranged in a rectangular shape and surrounds the photovoltaic array (20).

7. The shadow occlusion detection device (10) according to claim 1, characterized in that: The movable track (11) is arranged in a circular shape surrounding the photovoltaic array (20).

8. The shadow occlusion detection device (10) according to claim 1, characterized in that: The material of the movable track (11) includes metal, plastic or composite material.

9. The shadow occlusion detection device (10) according to claim 1, characterized in that: The photosensor (13) comprises a photoresistor sensor.

10. A photovoltaic power generation device, characterized in that: The invention comprises a photovoltaic array (20) and a shadow occlusion detection device (10) as claimed in any one of claims 1 to 9, wherein the photovoltaic array (20) comprises a frame and a plurality of photovoltaic cells, the plurality of photovoltaic cells are mounted on the frame in an array, and the movable track (11) is arranged on the frame along the edge of the photovoltaic array (20).

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