AU2021257936A1 - Method for inspecting connection bridge in photovoltaic array, and photovoltaic power generation system - Google Patents
Method for inspecting connection bridge in photovoltaic array, and photovoltaic power generation system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010248 power generation Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 88
- 238000007689 inspection Methods 0.000 claims abstract description 86
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000003491 array Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
A method for inspecting a connection bridge in a photovoltaic array, and a photovoltaic
power generation system are provided. In the method, a sensing unit is arranged on at least
one of a photovoltaic cleaning device, a connection bridge, and a photovoltaic module at a
5 side close to the connection bridge. The sensing unit inspects the connection bridge at
predetermined time intervals and transmits inspection data related to the connection bridge to
the photovoltaic cleaning device. The inspection data is compared with preset data. The
connection bridge is determined as having a fault in a case that the inspection data does not
match the preset data. The connection bridge is determined as having no fault in a case that
0 the inspection data matches the preset data. With the method, whether the connection bridge
has a fault is detected timely, thereby preventing the photovoltaic cleaning device from falling
from the connection bridge.
19
Arrange a sensing unit on at least one of a photovoltaic cleaning
device, a connection bridge, and a photovoltaic module at a side Si I
close to the connection bridge
The sensing unit inspects the connection bridge at predetermined
time intervals, and transmits inspection data related to the S12
connection bridge to the photovoltaic cleaning device
Compare the inspection data with preset data; determine that the
connection bridge has a fault in a case that the detection data
does not match the preset data; and determine that the S13
connection bridge has no fault in a case that the detection data
matches the preset data
Figure 1
4 4 2
1
14
4 2
Figure 2
-1/4-
Description
Arrange a sensing unit on at least one of a photovoltaic cleaning device, a connection bridge, and a photovoltaic module at a side Si I close to the connection bridge
The sensing unit inspects the connection bridge at predetermined time intervals, and transmits inspection data related to the S12 connection bridge to the photovoltaic cleaning device
Compare the inspection data with preset data; determine that the connection bridge has a fault in a case that the detection data does not match the preset data; and determine that the S13 connection bridge has no fault in a case that the detection data matches the preset data
Figure 1
1
4 4 2
14 4 2
Figure 2
-1/4-
Australian Patents Act 1990
Invention Title Method for inspecting connection bridge in photovoltaic array, and photovoltaic power generation system
The following statement is a full description of this invention, including the best method of performing it known to me/us:-
[0001] The present disclosure relates to the technical field of photovoltaic power generation, and in particular to a method for inspecting a connection bridge in a photovoltaic array, and a photovoltaic power generation system.
[0002] In a photovoltaic power station, adjacent photovoltaic strings or photovoltaic arrays are spaced. Photovoltaic strings or photovoltaic arrays are cleaned by a photovoltaic cleaning device at regular time intervals. The adjacent photovoltaic strings or photovoltaic arrays are connected by a connection bridge, helping the photovoltaic cleaning device clean the photovoltaic strings or photovoltaic arrays arranged in rows and columns.
[0003] In the conventional technology, whether the connection bridge has a fault is inspected manually. However, manual inspection is not comprehensive and not timely. As a result, loosening, breaking and even falling off of the connection bridge cannot be known in time. Therefore, the photovoltaic cleaning device has a risk of falling off from the connection bridge when cleaning the photovoltaic strings or photovoltaic arrays.
[0004] In view of the above, a method for inspecting a connection bridge in a photovoltaic array, and a photovoltaic power generation system are provided according to the present disclosure. Whether the connection bridge has a fault is determined by inspecting the connection bridge in real time, thereby reducing a probability of the photovoltaic cleaning device falling from a photovoltaic module.
[0005] The following technical solutions are provided according to the present disclosure, in order to reduce the probability of the photovoltaic cleaning device falling from a photovoltaic module.
[0006] A method for inspecting a connection bridge in a photovoltaic array is provided. The method includes: arranging a sensing unit on at least one of a photovoltaic cleaning device, a connection bridge, and a photovoltaic module at a side close to the connection bridge; inspecting the connection bridge by the sensing unit at predetermined time intervals; and
la transmitting, by the sensing unit, inspection data related to the connection bridge to the photovoltaic cleaning device; and comparing the inspection data with preset data; determining that the connection bridge has a fault in a case that the inspection data does not match the preset data; and determining that the connection bridge has no fault in a case that the inspection data matches the preset data.
[0007] In an embodiment, the method for inspecting a connection bridge in a photovoltaic array further includes: determining that the connection bridge has a fault in a case that the connection bridge is determined as having a fault a fault in the predetermined number of successive inspections; and determining that the connection bridge has no fault in a case that the connection bridge is determined as having no fault in at least one of the predetermined number of successive inspections.
[0008] In an embodiment, the sensing unit is arranged on the photovoltaic cleaning device. The photovoltaic cleaning device stops passing through the connection bridge when cleaning the photovoltaic module if it is determined that the connection bridge has a fault.
[0009] In an embodiment, the inspection data is transmitted to the photovoltaic cleaning device via a background management system. The inspection data is compared with the preset data by the photovoltaic cleaning device to determine whether the connection bridge has a fault.
[0010] In an embodiment, the sensing unit is arranged on the photovoltaic module at the side close to the connection bridge. The photovoltaic cleaning device stops passing through the connection bridge if it is determined that the connection bridge has a fault.
[0011] In an embodiment, the sensing unit is arranged on the connection bridge. The photovoltaic cleaning device stops passing through the connection bridge if it is determined that the connection bridge has a fault.
[0012] In an embodiment, the sensing unit includes at least one of a photoelectric output sensing unit, an analog output sensing unit, and an image acquisition sensing unit.
[0013] In an embodiment, the photoelectric output sensing unit includes at least one of an infrared photoelectric switch sensor, a through-beam photoelectric switch sensor, a diffuse reflection photoelectric switch sensor, a limit switch sensor, and a proximity switch sensor.
[0014] In an embodiment, the analog output sensing unit includes at least one of a laser ranging sensor, an ultrasonic sensor, a millimeter wave radar sensor, a pressure sensor, and a displacement sensor.
[0015] In an embodiment, it is determined that the connection bridge has no fault in a case that a sensing unit on a cantilever of the photovoltaic cleaning device detects that the connection bridge has a fault and another sensing unit on the cantilever detects that the connection bridge has no fault.
[0016] A photovoltaic power generation system is provided. The method for inspecting a connection bridge in a photovoltaic array is applicable to the photovoltaic power generation system. The photovoltaic power generation system includes multiple photovoltaic modules that are spaced, a connection bridge, a photovoltaic cleaning device, and a sensing unit. The connection bridge is connecting adjacent photovoltaic modules. The photovoltaic cleaning device is configured to clean the photovoltaic modules. The sensing unit is arranged on at least one of the photovoltaic cleaning device, the connection bridge, and the photovoltaic module at a side close to the connection bridge.
[0017] In an embodiment, the connection bridge is arranged between every adjacent photovoltaic modules in a part of the plurality of photovoltaic modules. A distance between adjacent photovoltaic modules without connected by a connection bridge is a first distance. The photovoltaic cleaning device includes at least one cantilever. Two sensing units are arranged on one of the at least one cantilever. A distance between the two sensing units is a second distance. The second distance is greater than the first distance.
[0018] The present disclosure has the following beneficial effects. With the method for inspecting a connection bridge in a photovoltaic array according to the present disclosure, whether the connection bridge has a fault is determined by comparing inspection data acquired by the sensing unit with the preset data that is pre-stored, thereby preventing the photovoltaic cleaning device from falling from the connection bridge.
[0019] In order to clearly describe the technical solutions in the embodiments of the present disclosure, drawings to be used in the description of the embodiments of the present disclosure are briefly described hereinafter. It is apparent that the drawings described below show merely some embodiments of the present disclosure, and those skilled in the art may obtain other drawings according to the embodiments of the present disclosure and the provided drawings without any creative effort.
[0020] Figure 1 is a flowchart of a method for inspecting a connection bridge in a photovoltaic array according to a first embodiment of the present disclosure;
[0021] Figure 2 is a schematic structural diagram of a photovoltaic power generation system according to the first embodiment of the present disclosure;
[0022] Figure 3 is a flowchart of a method for inspecting a connection bridge in a photovoltaic array according to a second embodiment of the present disclosure;
[0023] Figure 4 is a schematic structural diagram of a photovoltaic power generation system according to the second embodiment of the present disclosure;
[0024] Figure 5 is a flowchart of a method for inspecting a connection bridge in a photovoltaic array according to a third embodiment of the present disclosure; and
[0025] Figure 6 is a schematic structural diagram showing a connection bridge and a sensing unit according to the third embodiment of the present disclosure.
[0026] In the drawings:
1 photovoltaic module, 2 connection bridge,
3 photovoltaic cleaning device, 4 sensing unit.
[0027] In order to make the technical problems, the technical solutions and the technical effects of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure are described below in detail in conjunction with the drawings. Apparently, the embodiments described below are only some rather than all the embodiments of the present disclosure. Any other embodiments obtained by those skilled in the art based on the embodiments in the present disclosure without any creative effort fall within the protection scope of the present disclosure.
[0028] In the description of the present disclosure, it should be noted that positions or position relationships indicated by terms such as "center", "upper", "lower", "left", "right",
"vertical", "horizontal", "inside", "outside"and the like are based on positions or position relationships shown in the drawings. These terms are only for convenience of describing the present disclosure and simplifying the description rather than indicating or implying that a device or component is required to be at a particular position, constructed and operated in a particular direction. Therefore, these terms cannot be understood as a limitation to the present disclosure. In addition, the terms "first" and "second" are only for description and cannot be understood to indicate or imply relative importance. Terms "first position" and "second position" represent two different positions.
[0029] In the description of the present disclosure, it should be noted that terms "arranged", "connected to" and "connected with" should be understood in a broad sense unless otherwise clearly specified and defined. For example, the connection may be a fixed connection or a detachable connection, may be a mechanical connection or an electrical connection, and may be a direct connection or an indirect connection via a medium or inner communication between two components. Those skilled in the art can understand specific meanings of the above terms in the present disclosure based on specific conditions.
[0030] First Embodiment
[0031] As shown in Figure 1 and Figure 2, a method for inspecting a connection bridge in a photovoltaic array is provided according to the embodiment of the present disclosure. The method includes the following steps S1 to S13.
[0032] In step S11, a sensing unit 4 is arranged on at least one of a photovoltaic cleaning device 3, a connection bridge 2 and a photovoltaic module 1 at a side close to the connection bridge 2.
[0033] In step S12, the sensing unit 4 inspects the connection bridge 2 at predetermined time intervals, and transmits inspection data related to the connection bridge 2 to the photovoltaic cleaning device 3.
[0034] In step S13, the inspection data is compared with preset data. It is determined that the connection bridge 2 has a fault in a case that the inspection data does not match the preset data. It is determined that the connection bridge 2 has no fault in a case that the inspection data matches the preset data.
[0035] With the method for inspecting a connection bridge in a photovoltaic array according to the embodiment, whether the connection bridge has a fault is determined by comparing inspection data acquired by the sensing unit 4 with the preset data that is pre-stored, thereby preventing the photovoltaic cleaning device 3 from falling from the connection bridge 2.
[0036] After step S13, the method for inspecting a connection bridge in a photovoltaic array further includes step S14. In step S14, it is determined that the connection bridge 2 has a fault in a case that the connection bridge 2 is determined as having a fault in the predetermined number of successive inspections, and it is determined that the connection bridge 2 has no fault in a case that the connection bridge 2 is determined as having no fault in at least one of the predetermined number of successive inspections.
[0037] In step S13, when the photovoltaic cleaning device 3 cleans the photovoltaic module 1 or the wind blows the connection bridge 2, the connection bridge 2 may waggle. In this case, the sensing unit 4 may detect that the connection bridge 2 has a fault even if the connection bridge 2 has no fault, resulting in an inaccurate inspection result. That is, the connection bridge 2 is mistaken as having a fault, so that the inspection result is inaccurate. In step S14, it is determined that the connection bridge 2 has a fault in the case that the sensing unit 4 detects that the connection bridge 2 has a fault in all the predetermined successive inspections. In this case, the connection bridge 2 is required to be timely repaired by maintenance personnel. Otherwise, the connection bridge 2 is determined as having no fault and thus is not required to -0 be repaired. By performing step S14, a case that the connection bridge 2 is mistaken as having a fault due to waggle of the connection bridge 2 resulted from the photovoltaic cleaning device 3 or an external factor is avoided, so that accuracy of the inspection result is ensured.
[0038] It should be noted that in step S1, the sensing unit 4 is arranged on the photovoltaic cleaning device 3, and the preset data refers to inspection data acquired by the sensing unit 4 in a case that the connection bridge 2 has no fault. The predetermined successive inspections are set according to actual needs, for example, three inspections, four inspections, five inspections or the like. The inspection data acquired by the sensing unit 4 is directly transmitted to the photovoltaic cleaning device 3, or transmitted to the photovoltaic cleaning device 3 via a background management system. The photovoltaic cleaning device 3 compares the inspection data with the preset data to determine whether the connection bridge 2 has a fault, so as to timely obtain information about the connection bridge 2, thereby avoiding a case that the sensing unit 4 detects an fault of the connection bridge 2 but the photovoltaic cleaning device 3 cannot be informed that the connection bridge 2 has a fault.
[0039] In other embodiments, the background management system compares the received inspection data with the preset data to determine whether the connection bridge 2 has a fault, and transmits a final inspection result to the photovoltaic cleaning device 3.
[0040] As shown in Figure 2, four sensing units 4 are arranged on the photovoltaic cleaning device 3 according to the embodiment. In a process that the photovoltaic cleaning device 3 cleans the photovoltaic module 1 along a predetermined cleaning route from a stop position, the photovoltaic cleaning device 3 stops passing through the connection bridge 2 and returns to the stop position in a case that the connection bridge 2 is determined as having a fault, so as to prevent the connection bridge 2 from being further damaged due to stay of the photovoltaic cleaning device 3, and further reduce the probability that the photovoltaic cleaning device 3 falls from the connection bridge 2.
[0041] In step S1, the sensing unit 4 includes a photoelectric output sensing unit. Specifically, the photoelectric output sensing unit is implemented by an infrared photoelectric switch sensor. In the case that the connection bridge 2 has no fault, an infrared light emitted by the infrared photoelectric switch sensor reaches the connection bridge 2 and is reflected by the connection bridge 2. Then the reflected infrared light is received by the infrared photoelectric switch sensor. The infrared photoelectric switch sensor outputs a high level signal, that is, the inspection data in this case includes the high level signal, and a distance between the infrared photoelectric switch sensor and the connection bridge 2 is within a range distance.
[0042] In a case that the connection bridge 2 is loose, the infrared light emitted by the infrared photoelectric switch sensor reaches the connection bridge 2 but cannot be reflected by the connection bridge 2. Therefore, no reflected infrared light is received by the infrared photoelectric switch sensor. In this case, the infrared photoelectric switch sensor outputs a low level signal, that is, the inspection data in this case includes the low level signal. In a case that the connection bridge 2 is broken or even falls off, the infrared light emitted by the infrared photoelectric switch sensor cannot reach the connection bridge 2, and thus the infrared light cannot be reflected. In this case, the infrared photoelectric switch sensor outputs a low level signal, that is, the inspection data includes the low level signal. By comparing the low level signal outputted by the infrared photoelectric switch sensor in this case with the high level signal outputted by the infrared photoelectric switch sensor in the case that the connection bridge 2 has no fault, the connection bridge 2 is determined as having a fault in this inspection. In addition, the connection bridge 2 is determined as having a fault in a case that the connection bridge 2 is determined as having a fault in all the predetermined successive inspections. In this case, the distance between the infrared photoelectric switch sensor and the faulty connection bridge 2 is not within the range distance. In other embodiments, the infrared photoelectric switch sensor outputs a low level signal in a case that the connection bridge 2 has no fault and outputs a high level signal in a case that the connection bridge 2 has a fault.
[0043] In other embodiments, the photoelectric output sensing unit includes at least one of an infrared photoelectric switch sensor, a limit switch sensor, a proximity switch sensor and the like, which are all capable of outputting a low level signal or a high level signal. Whether the connection bridge 2 has a fault is determined through comparison. The connection bridge 2 is determined as having a fault in the case that the connection bridge 2 is determined as having a fault in all the predetermined consecutive inspections.
[0044] In other embodiments, the sensing unit 4 includes at least one of an analog output sensing unit and an image acquisition sensing unit.
[0045] In a case that the analog output sensing unit is implemented by a laser ranging sensor, a laser emitted by the laser ranging sensor reaches the connection bridge 2 and is reflected by the connection bridge 2. Then the reflected laser is received by the laser ranging sensor. The laser ranging sensor outputs a distance between the laser ranging sensor and the connection bridge 2. In this case, the inspection data includes the distance, and the preset data includes a preset distance range. The connection bridge 2 is determined as having no fault in a case that the outputted distance is within the predetermined distance range. The connection bridge 2 is determined as having a fault in a case that the outputted distance is not within the predetermined distance range. The connection bridge 2 is determined as having a fault in a case that the connection bridge 2 is determined as having a fault in all the predetermined successive inspections.
[0046] In other embodiments, the analog output sensing unit includes at least one of analog output sensing units for measuring a distance, such as an ultrasonic sensor, a millimeter wave radar sensor. These analog output sensing units are all capable of outputting a distance.
Whether the connection bridge 2 has a fault is determined through comparison. The connection bridge 2 is determined as having a fault in a case that the connection bridge 2 is determined as having a fault in all the predetermined successive inspections.
[0047] In other embodiments, the image acquisition sensing unit is implemented by an image sensor. The image sensor acquires images of the connection bridge 2 when having no fault, being loose, breaking or falling off. That is, the inspection data includes these images. In addition, the acquired images are stored in the photovoltaic cleaning device 3 or the background management system. After a large number of images are stored, whether the connection bridge 2 has a fault is determined based on the acquired images of the connection bridge 2.
[0048] Generally, if a distance between adjacent photovoltaic modules 1 is large, a connection bridge 2 is arranged between the adjacent photovoltaic modules 1. If a distance between adjacent photovoltaic modules 1 is small, it is unnecessarily to arrange a connection bridge 2 between the adjacent photovoltaic modules 1. In order to prevent the sensing unit 4 from erroneously determining a case of no connection bridge 2 as a fault, two sensing units 4 are arranged on at least one cantilever of the photovoltaic cleaning device 3. In a case that one sensing unit 4 on a cantilever of the photovoltaic cleaning device 3 determines that the connection bridge 2 has a fault and the other sensing unit 4 on the cantilever determines that the connection bridge 2 has no fault, it indicates no connection bridge 2 in arranged between -0 adjacent photovoltaic modules 1 that are relatively close. Since no connection bridge 2 is arranged between the adjacent photovoltaic modules 1, the connection bridge 2 is determined as having no fault. The connection bridge 2 is determined as having a fault only in a case that all the two sensing units 4 determines that the connection bridge 2 has a fault.
[0049] A photovoltaic power generation system is further provided according to the embodiment. The method for inspecting a connection bridge in a photovoltaic array according to above embodiment is applicable to the photovoltaic power generation system. As shown in Figure 2, the photovoltaic power generation system includes multiple photovoltaic modules 1 that are spaced, a connection bridge 2, a photovoltaic cleaning device 3 and a sensing unit 4. The connection bridge 2 is connecting adjacent photovoltaic modules 1. The photovoltaic cleaning device 3 is configured to clean the photovoltaic modules 1. The sensing unit 4 is arranged on the photovoltaic cleaning device 3.
[0050] As shown in Figure 2, the photovoltaic cleaning device 3 includes four cantilevers. For each of the four cantilevers, a sensing unit 4 is arranged on the cantilever. That is, four sensing units 4 are arranged on the photovoltaic cleaning device 3. In other embodiments, at least one sensing unit 4 is arranged on the photovoltaic cleaning device 3. Further, at least one sensing unit 4 is arranged on a cantilever at the front of the photovoltaic cleaning device 3, and an arrangement position of other sensing unit 4 is determined based on actual needs. In a case only one sensing unit 4 is arranged on the photovoltaic cleaning device 3 and is arranged on a cantilever at the rear of the photovoltaic cleaning device 3, the sensing unit 4 is not directly above the connection bridge 2 when the front of the photovoltaic cleaning device 3 has reached the connection bridge 2. In this case, the sensing unit 4 cannot detect a fault even if the connection bridge 2 has a fault. As a result, the photovoltaic cleaning device 3 may fall from the connection bridge 2 due to the fault of the connection bridge 2.
[0051] In other embodiments, a connection bridge 2 is arranged between adjacent photovoltaic modules 1 of some photovoltaic modules. A distance between adjacent photovoltaic modules 1 without connected by a connection bridge 2 is a first distance. That is, not all adjacent photovoltaic modules 1 are connected by a connection bridge 2, and some adjacent photovoltaic modules 1 are not connected by a connection bridge 2. A distance between adjacent photovoltaic modules 1 without connected by a connection bridge 2 is small, so that the photovoltaic cleaning device 3 is able to move from one of the adjacent photovoltaic modules 1 to the other of the adjacent photovoltaic modules 1. In this case, at least one cantilever is provided with two sensing units 4. A distance between the two sensing units 4 is a second distance, and the second distance is greater than the first distance. In a case that all the two sensing units 4 detect that the connection bridge 2 has a fault, the connection bridge 2 is determined as having a fault. In a case that one sensing unit 4 on a cantilever detects that the connection bridge 2 has a fault and the other sensing unit 4 on the cantilever detects that the connection bridge 2 has no fault, it indicates that the photovoltaic cleaning device 3 moves between adjacent photovoltaic modules 1 without connected by a connection bridge 2, and the connection bridge 2 is determined as having no fault.
[0052] Second Embodiment
[0053] As shown in Figure 3 and Figure 4, a method for inspecting a connection bridge in a photovoltaic array is provided according to the embodiment. The method includes the following steps S21 to S24.
[0054] In step S21, a sensing unit 4 is arranged on a photovoltaic module 1 at a side close to a connection bridge 2.
[0055] In step S22, the sensing unit 4 inspects the connection bridge 2 at predetermined time intervals, and transmits inspection data related to the connection bridge 2 to a photovoltaic cleaning device 3.
[0056] In step S23, the photovoltaic cleaning device 3 compares the inspection data with preset data; determines that the connection bridge 2 has a fault in a case that the inspection data does not match the preset data; and determines that the connection bridge 2 has no fault in a case that the inspection data matches the preset data.
[0057] In step S24, it is determined that the connection bridge 2 has a fault in a case that the connection bridge 2 is determined as having a fault in the predetermined number of successive inspections, and it is determined that the connection bridge 2 is determined as having no fault in a case that the connection bridge 2 has no fault in at least one of the predetermined number of successive inspections.
[0058] It should be noted that in step S24, the photovoltaic cleaning device 3 stops passing through the connection bridge 2 in a case that the connection bridge 2 is determined as having a fault.
[0059] In step S21, the sensing unit 4 is implemented by a photoelectric output sensing unit. Specifically, the photoelectric output sensing unit is implemented by a through-beam photoelectric switch sensor. A transmitter and a receiver of the through-beam photoelectric switch sensor are respectively arranged on two photovoltaic modules 1 between which the connection bridge 2 is arranged. The transmitter and the receiver are parallel to a bridge surface of the connection bridge 2. In a case that the connection bridge 2 has a fault, the bridge surface sinks relative to a case that the connection bridge 2 has no fault. In this case, a signal emitted by the transmitter is blocked by the sinking connection bridge 2, so that the receiver fails to receive the signal. Therefore, the connection bridge 2 is determined as having a fault.
[0060] In other embodiments, the photoelectric output sensing unit is implemented by a diffuse reflection photoelectric switch sensor. The diffuse reflection photoelectric switch sensor is mounted on the photovoltaic module 1 at a side close to the connection bridge 2, and is mounted horizontally. In a case that the connection bridge 2 has no fault, the diffuse reflective photoelectric switch sensor fails to receive a reflected light of a light emitted by the diffuse reflective photoelectric switch sensor. In a case that the connection bridge 2 has a fault, the bridge surface sinks relative to the case that the connection bridge 2 has no fault, so that the diffuse reflection photoelectric switch sensor receives the reflected light of the light emitted by the diffuse reflection photoelectric switch sensor. Therefore, the connection bridge 2 is determined as having a fault.
[0061] In other embodiments, the photoelectric output sensing unit is implemented by a limit switch sensor. The limit switch sensor is arranged on the photovoltaic module 1 at a side close to the connection bridge 2. In a case that the connection bridge 2 has no fault, a baffle of the limit switch sensor is not squeezed by the connection bridge 2. The limit switch sensor outputs a high level signal, that is, the inspection data in this case includes the high level signal. In a case that the connection bridge 2 has a fault, a bridge surface sinks relative to the case that the connection bridge 2 has no fault. The connection bridge 2 contacts the baffle of the limit switch sensor, so that the limit switch sensor outputs a low level signal, that is, the inspection data in this case includes the low level signal. Therefore, the connection bridge 2 is determined as having a fault. In other embodiments, the limit switch sensor outputs a low level signal in the case that the connection bridge 2 has no fault, and outputs a high level signal in the case that the connection bridge 2 has a fault.
[0062] In other embodiments, the photoelectric output sensing unit is implemented by a proximity switch sensor. The proximity switch sensor is arranged on the photovoltaic module 1 a side close to the connection bridge 2. In a case that the connection bridge 2 has no fault, the proximity switch sensor fails to detect the connection bridge 2 and outputs a high level signal. That is, the inspection data in this case includes the high level signal. In a case that the connection bridge 2 has a fault, the bridge surface sinks relative to the case that the connection bridge 2 has no fault. The connection bridge 2 approaches the proximity switch sensor, so that the proximity switch sensor outputs a low level signal. That is, the inspection data in this case includes the low level signal, and the connection bridge 2 is determined as having a fault. In other embodiments, the proximity switch sensor outputs a low level signal in the case that the connection bridge 2 has no fault and outputs a high level signal in the case that the connection bridge 2 has a fault. In other embodiments, the photoelectric output sensing unit is implemented by other sensing unit 4. The sensing unit 4 is arranged on the photovoltaic module 1at a side close to the connection bridge 2, and a type of the sensing unit 4 is determined according to actual needs.
[0063] In other embodiments, the sensing unit 4 includes at least one of an analog output sensing unit and an image acquisition sensing unit.
[0064] In other embodiments, the analog output sensing unit is implemented by a pressure sensor. The pressure sensor is arranged on the photovoltaic module 1 at a side close to the connection bridge 2. In a case that the connection bridge 2 has no fault, the pressure sensor fails to detect a pressure or detects a relatively small pressure, and accordingly outputs a relatively small voltage or current. That is, the inspection data in this case includes the voltage or the current. In a case that the connection bridge 2 has a fault, the pressure sensor detects an increasing pressure and accordingly outputs relatively large inspection data. When the detected pressure increases to a threshold of abnormal pressure, the connection bridge 2 is determined as having a fault.
[0065] In other embodiments, the analog output sensing unit is implemented by a displacement sensor. The displacement sensor is arranged on the photovoltaic module 1 at a side close to the connection bridge 2. In a case that the connection bridge 2 has no fault, the displacement sensor is not compressed or stretched, and outputs a voltage or a current within a predetermined threshold range. That is, the inspection data in this case includes the voltage or the current. In a case that the connection bridge 2 has a fault, the displacement sensor is compressed or stretched and outputs a voltage or a current not within the predetermined threshold range, so that the connection bridge 2 is determined as having a fault.
[0066] In other embodiments, the analog output sensing unit is other sensing unit 4. The sensing unit 4 is arranged on the photovoltaic module 1 at a side close to the connection bridge 2 and a type of the sensing unit 4 is determined according to actual needs.
[0067] In other embodiments, the image acquisition sensing unit is implemented by an image sensor. The image sensor acquires images of the connection bridge 2 when having no fault, being loose, breaking or falling off. That is, the inspection data includes these images. In addition, the acquired images are stored in the photovoltaic cleaning device 3 or the background management system. After a large number of images are stored, whether the connection bridge 2 has a fault is determined based on the acquired images of the connection bridge 2.
[0068] As shown in Figure 4, a photovoltaic power generation system is further provided according to the embodiment. The photovoltaic power generation system according to this embodiment is different from that according to the first embodiment in that four sensing units 4 in this embodiment are arranged on the photovoltaic module 1 at a side close to the connection bridge 2.
[0069] Third Embodiment
[0070] As shown in Figure 5 and Figure 6, a method for inspecting a connection bridge in a photovoltaic array is provided according to the embodiment. The method includes the following steps S31 to S34.
[0071] In step S31, a sensing unit 4 is arranged on a connection bridge 2.
[0072] In step S32, the sensing unit 4 inspects the connection bridge 2 at predetermined time intervals, and transmits inspection data related to the connection bridge 2 to a photovoltaic cleaning device 3.
[0073] In step S33, the photovoltaic cleaning device 3 compares the inspection data with preset data; determines that the connection bridge 2 has a fault in a case that the inspection data does not match the preset data; and determines that the connection bridge 2 has no fault in a case that the inspection data matches the preset data.
[0074] In step S34, it is determined that the connection bridge 2 has a fault in a case that the connection bridge 2 is determined as having a fault in the predetermined number of successive inspections, and it is determined that the connection bridge 2 is determined as having no fault in a case that the connection bridge 2 has no fault in at least one of the predetermined number of successive inspections.
[0075] This embodiment is different from the second embodiment in that the sensing unit 4 according to this embodiment is arranged on the connection bridge 2 in step S31, as shown in Figure 6. The sensing unit 4 may be any one of a photoelectric output sensing unit or an analog output sensing unit, and a type of the sensing unit 4 is similar to that in the second embodiment. The photovoltaic cleaning device 3 stops passing through the connection bridge 2 in a case that the connection bridge 2 is determined as having a fault.
[0076] As shown in Figure 6, a photovoltaic power generation system is further provided according to this embodiment. The photovoltaic power generation system according to this embodiment is different from that according to the second embodiment in that the photovoltaic power generation system according to the third embodiment includes six sensing units 4. Four of the six sensing units 4 are arranged on the connection bridge 2 at a position where the connection bridge 2 is connected to a photovoltaic module 1. The other two sensing units 4 are arranged at a center of the connection bridge 2. In other embodiments, the photovoltaic power generation system may include other number of sensing units 4, which is determined according to actual needs.
[0077] It should be noted that the above description shows only preferred embodiments and technical principles of the present disclosure. Those skilled in the art can understand that the present disclosure is not limited to the embodiments described herein. Various variations, readjustments and substitutions may be made by those skilled in the art without departing from the protection scope of the present disclosure. Therefore, although the present disclosure is described in detail based on the above embodiments, the present disclosure is not limited to the above embodiments and may further include other equivalent embodiments without departing from the conception of the present disclosure. The scope of the present disclosure depends on the scope limited by the claims.
[0078] Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and -0 "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
[0079] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavor to which this specification relates.
[0080] The reference numerals in the following claims do not in any way limit the scope of the respective claims.
Claims (12)
1. A method for inspecting a connection bridge in a photovoltaic array, comprising:
arranging a sensing unit (4) on at least one of a photovoltaic cleaning device (3), a connection bridge (2), and a photovoltaic module (1) at a side close to the connection bridge (2);
inspecting the connection bridge (2) by the sensing unit (4) at predetermined time intervals; and transmitting, by the sensing unit (4), inspection data related to the connection bridge (2) to the photovoltaic cleaning device (3); and
comparing the inspection data with preset data; determining that the connection bridge (2) has a fault in a case that the inspection data does not match the preset data; and determining that the connection bridge (2) has no fault in a case that the inspection data matches the preset data.
2. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, further comprising:
determining that the connection bridge (2) has a fault in a case that the connection bridge (2) is determined as having a fault in the predetermined number of successive inspections; and
determining that the connection bridge (2) has no fault in a case that the connection bridge (2) is determined as having no fault in at least one of the predetermined number of successive inspections.
3. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, wherein the sensing unit (4) is arranged on the photovoltaic cleaning device (3), wherein
the photovoltaic cleaning device (3) stops passing through the connection bridge (2) when cleaning the photovoltaic module (1) if it is determined that the connection bridge (2) has a fault.
4. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, wherein
the inspection data is transmitted to the photovoltaic cleaning device (3) via a background management system; and the inspection data is compared with the preset data by the photovoltaic cleaning device (3) to determine whether the connection bridge (2) has a fault.
5. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, wherein the sensing unit (4) is arranged on the photovoltaic module (1) at the side close to the connection bridge (2), wherein
the photovoltaic cleaning device (3) stops passing through the connection bridge (2) if it is determined that the connection bridge (2) has a fault.
6. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, wherein the sensing unit (4) is arranged on the connection bridge (2), wherein
the photovoltaic cleaning device (3) stops passing through the connection bridge (2) if it is determined that the connection bridge (2) has a fault.
7. The method for inspecting a connection bridge in a photovoltaic array according to claim 1, wherein the sensing unit (4) comprises at least one of a photoelectric output sensing unit, an analog output sensing unit, and an image acquisition sensing unit.
8. The method for inspecting a connection bridge in a photovoltaic array according to claim 7, wherein the photoelectric output sensing unit comprises at least one of an infrared photoelectric switch sensor, a through-beam photoelectric switch sensor, a diffuse reflection photoelectric switch sensor, a limit switch sensor, and a proximity switch sensor.
9. The method for inspecting a connection bridge in a photovoltaic array according to claim 7, wherein the analog output sensing unit comprises at least one of a laser ranging sensor, an ultrasonic sensor, a millimeter wave radar sensor, a pressure sensor, and a displacement sensor.
10. The method for inspecting a connection bridge in a photovoltaic array according to claim 3, wherein it is determined that the connection bridge (2) has no fault in a case that a sensing unit (4) on a cantilever of the photovoltaic cleaning device (3) detects that the connection bridge (2) has a fault and another sensing unit (4) on the cantilever detects that the connection bridge (2) has no fault.
11. A photovoltaic power generation system, wherein the method for inspecting a connection bridge in a photovoltaic array according to any one of claims 1 to 10 is applicable to the photovoltaic power generation system, and the photovoltaic power generation system comprises: a plurality of photovoltaic modules (1) that are spaced; a connection bridge (2) connecting adjacent photovoltaic modules (1); a photovoltaic cleaning device (3) configured to clean the photovoltaic modules (1); and a sensing unit (4) arranged on at least one of the photovoltaic cleaning device (3), the connection bridge (2), and the photovoltaic module (1) at a side close to the connection bridge (2).
12. The photovoltaic power generation system according to claim 11, wherein
the connection bridge (2) is arranged between every adjacent photovoltaic modules (1) in a part of the plurality of photovoltaic modules (1);
a distance between adjacent photovoltaic modules (1) without connected by a connection bridge (2) is a first distance; and
the photovoltaic cleaning device (3) comprises at least one cantilever, wherein two sensing units (4) are arranged on one of the at least one cantilever, a distance between the two sensing units (4) is a second distance, and the second distance is greater than the first distance.
Arrange a sensing unit on at least one of a photovoltaic cleaning device, a connection bridge, and a photovoltaic module at a side S11 close to the connection bridge
The sensing unit inspects the connection bridge at predetermined time intervals, and transmits inspection data related to the S12 2021257936
connection bridge to the photovoltaic cleaning device
Compare the inspection data with preset data; determine that the connection bridge has a fault in a case that the detection data does not match the preset data; and determine that the S13 connection bridge has no fault in a case that the detection data matches the preset data
Figure 1
Figure 2
-1/4-
Arrange a sensing unit on a photovoltaic module at a side close S21 to a connection bridge
The sensing unit inspects the connection bridge at predetermined time intervals, and transmits inspection data related to the S22 connection bridge to the photovoltaic cleaning device
The photovoltaic cleaning device compares the inspection data with preset data; determines that the connection bridge has a fault in a case that the detection data does not match the preset S23 data; and determines that the connection bridge has no fault in a case that the detection data matches the preset data
Determine that the connection bridge has a fault when determining that the connection bridge has a fault in the predetermined number of successive inspections, and determine that the connection bridge has no fault when determining that the S24 connection bridge has no fault in at least one of the predetermined number of successive inspections
Figure 3
-2/4-
-3/4- Figure 4
Arrange a sensing unit on a connection bridge S31
The sensing unit inspects the connection bridge at predetermined time intervals, and transmits inspection data related to the S32 connection bridge to the photovoltaic cleaning device 2021257936
The photovoltaic cleaning device compares the inspection data with preset data; determines that the connection bridge has a fault in a case that the detection data does not match the preset S33 data; and determines that the connection bridge has no fault in a case that the detection data matches the preset data
Determine that the connection bridge has a fault when determining that the connection bridge has a fault in the predetermined number of successive inspections, and determine that the connection bridge has no fault when determining that the S34 connection bridge has no fault in at least one of the predetermined number of successive inspections
Figure 5
Figure 6 -4/4-
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| CN202011398909.9A CN112577545B (en) | 2020-12-01 | 2020-12-01 | Detection method of photovoltaic cleaning device and photovoltaic power generation system |
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| JP2897111B2 (en) * | 1995-02-02 | 1999-05-31 | 規方 田熊 | Cleaning device for solar cells by wave power |
| US20150349706A1 (en) * | 2014-06-03 | 2015-12-03 | Sunpower Corporation | Solar module cleaner |
| WO2016172810A1 (en) * | 2015-04-27 | 2016-11-03 | 张意铃 | Thermal-infrared detection system applied to photovoltaic module fault detection |
| WO2017145194A1 (en) * | 2016-02-24 | 2017-08-31 | 株式会社 スカイロボット | Cleaning device for photovoltaic power generation panel |
| CN105834188B (en) * | 2016-05-13 | 2017-03-22 | 北京中电博顺智能设备技术有限公司 | Photovoltaic panel cleaning equipment |
| CN206180954U (en) * | 2016-09-12 | 2017-05-17 | 深圳创动科技有限公司 | Solar cell panel service equipment and running gear thereof |
| CN206701782U (en) * | 2016-11-15 | 2017-12-05 | 南京绿谷信息科技有限公司 | A kind of photovoltaic array cleaning device |
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| JP2020069460A (en) * | 2018-10-31 | 2020-05-07 | 孝一 中川 | Solar panel cleaning device |
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| CN110138329A (en) * | 2019-06-19 | 2019-08-16 | 珠海思略智能科技有限公司 | Cleaning running gear crosses slope control assembly and photovoltaic array |
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