CN115276558A - Photovoltaic detection method and system - Google Patents
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- 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
Abstract
The invention discloses a photovoltaic detection method and a system, and the photovoltaic detection method provided by the invention comprises the steps of firstly determining a photovoltaic panel group with faults based on all panel group voltage values, and marking the photovoltaic panel group with the faults as an abnormal panel group; all detection switches in the detection modules corresponding to the abnormal plate group are switched off, then all detection switches are switched on in sequence, so that the voltage sensor detects the output voltage of the photovoltaic plate corresponding to each detection switch in sequence, and then the sub-voltage value corresponding to each photovoltaic plate in the abnormal plate group is compared with the standard output voltage value, so that whether the photovoltaic plate corresponding to the sub-voltage value fails or not can be judged; the photovoltaic detection method provided by the invention can determine the failed photovoltaic panel under the condition that an operator does not go to the site for troubleshooting, so that the detection efficiency of the photovoltaic panel is greatly improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic detection, in particular to a photovoltaic detection method and system.
Background
Photovoltaic panel assemblies are electrical power generating devices that produce direct current electricity when exposed to sunlight and are comprised of thin solid photovoltaic cells made almost entirely of semiconductor materials such as silicon.
At present, in a large-scale solar photovoltaic power generation system, a fault detection scheme for a photovoltaic panel is generally as follows: the solar power generation monitoring center carries out fault location through monitoring facilities so as to determine a photovoltaic panel group with a fault; after the field detection personnel reach the fault point, the photovoltaic panel groups with faults are powered off and then the photovoltaic panels are detected one by one so as to find out the single photovoltaic panel with faults and replace the photovoltaic panel with faults.
That is to say, the monitoring facility of the existing solar photovoltaic power generation system can only locate the fault to the photovoltaic panel group, and can not specifically detect which photovoltaic panel has the fault, and the maintenance personnel must go to the site to perform power failure detection and check one by one, so that the existing fault detection scheme of the photovoltaic panel is complex in operation and low in detection efficiency.
Disclosure of Invention
The invention mainly aims to provide a photovoltaic detection method and a photovoltaic detection system, and aims to solve the problems of complex operation and low detection efficiency of the conventional fault detection scheme of a photovoltaic panel.
The technical scheme provided by the invention is as follows:
a photovoltaic detection method is applied to a photovoltaic detection system; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor; each photovoltaic panel in the photovoltaic panel group corresponds to the detection switches one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switch is connected between the photovoltaic panel and the voltage sensor in series; the method comprises the following steps:
acquiring a plate group voltage value sent by a detection module through the host, wherein the plate group voltage value is an output voltage value of the whole photovoltaic plate group detected by a voltage sensor when all detection switches in the detection module are switched on, and the plate group voltage value corresponds to the photovoltaic plate groups one by one;
determining a photovoltaic panel group with a fault based on all panel group voltage values, and marking the photovoltaic panel group with the fault as an abnormal panel group;
all detection switches in the detection module corresponding to the abnormal plate group are switched off and then switched on in sequence, and the voltage value detected by the voltage sensor when each detection switch is switched on is marked as a sub-voltage value, wherein each photovoltaic plate corresponds to a unique sub-voltage value;
and marking all the sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the photovoltaic plate with the fault in the abnormal plate group based on the detection voltage set.
Preferably, the determining the faulty pv panel group based on all panel group voltage values and marking the faulty pv panel group as an abnormal panel group includes:
obtaining an average plate group voltage value based on the plate group voltage values corresponding to all the photovoltaic plate groups;
acquiring a difference value between each plate group voltage value and the average plate group voltage value, and marking as a plate group difference value;
acquiring a first preset difference value;
and marking the photovoltaic panel group corresponding to the panel group difference value larger than the preset difference value as an abnormal panel group.
Preferably, the obtaining the first preset difference value includes:
acquiring a standard output voltage value of a single photovoltaic panel in the photovoltaic panel group;
and taking the standard output voltage value of a single photovoltaic panel in the photovoltaic panel group as the first preset difference value.
Preferably, marking all the sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the faulty photovoltaic plate in the abnormal plate group based on the detection voltage set, includes:
acquiring a standard output voltage value of a single photovoltaic panel in a photovoltaic panel group;
acquiring a second preset difference value, wherein the second preset difference value is smaller than the standard output voltage value;
judging whether a sub-voltage value with a difference value larger than a second preset difference value with the standard output voltage value exists or not;
and if so, determining the photovoltaic panel corresponding to the sub-voltage value with the difference value between the standard output voltage value and the standard output voltage value larger than a second preset difference value as the failed photovoltaic panel.
Preferably, the determining whether there is a sub-voltage value whose difference from the standard output voltage value is greater than a second preset difference further includes:
if yes, judging whether the sub-voltage value corresponding to the photovoltaic panel with the fault is 0 or not;
and when the sub-voltage value corresponding to the failed photovoltaic panel is 0, marking the photovoltaic panel with the sub-voltage value of 0 as a damaged panel.
Preferably, the determining whether there is a sub-voltage value having a difference with the standard output voltage value larger than a second preset difference, and then further includes:
if not, judging whether all the sub-voltage values meet the following conditions: the sub-voltage value smaller than the standard output voltage value exists, and all the sub-voltage values are not 0;
and when the sub-voltage values smaller than the standard output voltage value exist and all the sub-voltage values are not 0, marking the abnormal plate group as a plate group to be analyzed.
Preferably, when there is a sub-voltage value smaller than the standard output voltage value and all the sub-voltage values are not 0, the abnormal plate group is marked as a plate group to be analyzed, and then the method further includes:
acquiring a plate group voltage value sent by a detection module corresponding to the plate group to be analyzed once every preset time within a preset time period, and marking the plate group voltage value as the voltage value to be analyzed, wherein the preset time period is the time period corresponding to the current time section in the daytime;
acquiring a voltage value of an average plate set once every other preset time within a preset time period;
judging whether the voltage values to be analyzed at the same moment are all smaller than the voltage value of the average plate set;
and if so, marking the plate group to be analyzed as a plate group to be cleaned.
Preferably, the system further comprises a camera and a display which are in communication connection with the host; the number of the cameras is multiple; each camera is used for shooting a real-time image of the photovoltaic panel set; the method comprises the following steps of marking the plate group to be analyzed as a plate group to be cleaned, and then further comprising the following steps:
acquiring a real-time image shot by a camera closest to the to-be-cleaned board group;
carrying out image analysis on the real-time image to judge whether a to-be-cleaned board group has shielding foreign matters;
and if so, displaying the real-time image through the display.
Preferably, each photovoltaic panel is correspondingly provided with a unique panel number, and the panel number mark is displayed on the back of the photovoltaic panel; each detection switch is correspondingly provided with a unique switch number; the system also includes a display communicatively coupled to the host; marking all sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the photovoltaic plate with a fault in the abnormal plate group based on the detection voltage set, and then:
acquiring a plate number and a switch number corresponding to a failed photovoltaic plate, and packaging to form failure information;
and displaying the fault information through the display.
The invention also provides a photovoltaic detection system, which is applied to the photovoltaic detection method; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the plurality of voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor; each photovoltaic plate in the photovoltaic plate group corresponds to the detection switch one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switch is connected between the photovoltaic panel and the voltage sensor in series.
Through above-mentioned technical scheme, can realize following beneficial effect:
the photovoltaic detection method provided by the invention comprises the steps of firstly obtaining a plate group voltage value sent by a detection module through a host; then, determining a photovoltaic panel group with a fault based on all panel group voltage values, and marking the photovoltaic panel group with the fault as an abnormal panel group; after the abnormal plate group with faults is determined, all detection switches in the detection modules corresponding to the abnormal plate group are switched off, and then all detection switches are switched on in sequence, so that the voltage sensor detects the output voltage (marked as a sub-voltage value) of the photovoltaic plate corresponding to each detection switch in sequence, and then the sub-voltage value corresponding to each photovoltaic plate in the abnormal plate group is compared with a standard output voltage value (namely the standard output voltage when a single photovoltaic plate works normally), so that whether the photovoltaic plate corresponding to the sub-voltage value has faults or not can be judged, and the photovoltaic plate with faults in the abnormal plate group is determined; the photovoltaic detection method provided by the invention can determine the failed photovoltaic panel under the condition that an operator does not go to the site to perform troubleshooting, so that the overhaul personnel do not need to go to the site to perform power-off detection to perform troubleshooting one by one, the operation is simpler, and the detection efficiency of the photovoltaic panel is greatly improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a flowchart of a photovoltaic detection method according to a first embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a photovoltaic detection method and a photovoltaic detection system.
As shown in fig. 1, in a first embodiment of a photovoltaic detection method provided by the present invention, the photovoltaic detection method is applied to a photovoltaic detection system; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the plurality of voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor; each photovoltaic plate in the photovoltaic plate group corresponds to the detection switch one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switch is connected between the photovoltaic panel and the voltage sensor in series; the embodiment comprises the following steps:
step S110: and acquiring a plate group voltage value sent by the detection module through the host, wherein the plate group voltage value is an output voltage value of the whole photovoltaic plate group detected by the voltage sensor when all detection switches in the detection module are switched on, and the plate group voltage value corresponds to the photovoltaic plate groups one by one.
Specifically, the voltage value of the plate group is a voltage value which is output outwards integrally when the photovoltaic plate group works, and the voltage value of the plate group is the sum of the output voltages of the photovoltaic plates in the photovoltaic plate group.
Step S120: and determining the failed photovoltaic panel group based on all panel group voltage values, and marking the failed photovoltaic panel group as an abnormal panel group.
Specifically, since the plate group voltage value is the sum of the output voltages of the photovoltaic plates in the photovoltaic plate group, if the output voltage is reduced or the output voltage is 0 due to a failure of a certain photovoltaic plate in the photovoltaic plate group, the output voltage of the whole photovoltaic plate group will be changed (reduced), and the plate group voltage value corresponding to each photovoltaic plate group is compared with the plate group voltage values of other photovoltaic plate groups, so that whether the photovoltaic plate group fails or not can be judged.
Step S130: all detection switches in the detection module corresponding to the abnormal plate group are switched off and then switched on in sequence, and the voltage value detected by the voltage sensor when each detection switch is switched on is marked as a sub-voltage value, wherein each photovoltaic plate corresponds to a unique sub-voltage value.
Specifically, after the abnormal plate group with the fault is determined, all detection switches in the detection modules corresponding to the abnormal plate group are all switched off, and then all detection switches are switched on in sequence, so that the voltage sensor can detect the output voltage (marked as a sub-voltage value) of the photovoltaic plate corresponding to each detection switch in sequence, and subsequently, whether the photovoltaic plate has the fault or not can be judged according to the output voltage of each photovoltaic plate.
Step S140: and marking all the sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the photovoltaic plate with the fault in the abnormal plate group based on the detection voltage set.
Specifically, the sub-voltage value corresponding to each photovoltaic panel in the abnormal panel group is compared with the standard output voltage value (i.e., the standard output voltage when a single photovoltaic panel normally works), so that whether the photovoltaic panel corresponding to the sub-voltage value fails or not can be judged, and the failed photovoltaic panel in the abnormal panel group is determined.
The photovoltaic detection method provided by the invention comprises the steps of firstly obtaining a plate group voltage value sent by a detection module through a host; then, determining a photovoltaic panel group with a fault based on all panel group voltage values, and marking the photovoltaic panel group with the fault as an abnormal panel group; after the abnormal plate group with faults is determined, all detection switches in the detection modules corresponding to the abnormal plate group are switched off, and then all detection switches are switched on in sequence, so that the voltage sensor detects the output voltage (marked as a sub-voltage value) of the photovoltaic plate corresponding to each detection switch in sequence, and then the sub-voltage value corresponding to each photovoltaic plate in the abnormal plate group is compared with a standard output voltage value (namely the standard output voltage when a single photovoltaic plate works normally), so that whether the photovoltaic plate corresponding to the sub-voltage value has faults or not can be judged, and the photovoltaic plate with faults in the abnormal plate group is determined; the photovoltaic detection method provided by the invention can determine the failed photovoltaic panel under the condition that an operator does not go to the site to perform troubleshooting, so that the overhaul personnel do not need to go to the site to perform power-off detection to perform troubleshooting one by one, the operation is simpler, and the detection efficiency of the photovoltaic panel is greatly improved.
In a second embodiment of the photovoltaic detection method provided by the present invention, based on the first embodiment, step S130 includes the following steps:
step S210: and obtaining an average plate group voltage value based on the plate group voltage values corresponding to all the photovoltaic plate groups.
Specifically, the average plate group voltage value here is an average value of plate group voltages of all photovoltaic plate groups in the same field at the same time, and the value can reflect a voltage value that should be output by a photovoltaic plate group that normally operates at the current time.
Step S220: the difference between each plate set voltage value and the average plate set voltage value is obtained and marked as the plate set difference.
Specifically, the panel group voltage value of each photovoltaic panel group is compared with the average panel group voltage value, and the obtained difference value is marked as a panel group difference value.
Step S230: and acquiring a first preset difference value.
Specifically, such a first predetermined difference is expressed as a value that, if a faulty photovoltaic panel occurs in the photovoltaic panel group, the output voltage value of the whole photovoltaic panel group is decreased by at least a decrease.
Step S240: and marking the photovoltaic panel group corresponding to the panel group difference value larger than the preset difference value as an abnormal panel group.
Specifically, the photovoltaic panel group corresponding to the panel group difference value larger than the preset difference value is directly marked as an abnormal panel group.
In a third embodiment of the photovoltaic detection method provided by the present invention, based on the second embodiment, step S230 includes the following steps:
step S310: and acquiring the standard output voltage value of a single photovoltaic panel in the photovoltaic panel group.
Specifically, the standard output voltage value of a single photovoltaic panel is the output voltage value (e.g., 1.5V) of the single photovoltaic panel in the normal operating condition.
Step S320: and taking the standard output voltage value of a single photovoltaic panel in the photovoltaic panel group as the first preset difference value.
Specifically, the purpose of this embodiment is to use the standard output voltage value of a single photovoltaic panel as the first preset difference value, that is, when 1 faulty photovoltaic panel occurs in the photovoltaic panel group, the photovoltaic panel group is marked as an abnormal panel group.
In a fourth embodiment of the photovoltaic detection method provided by the present invention, based on the second embodiment, step S150 includes the following steps:
step S410: and acquiring the standard output voltage value of a single photovoltaic panel in the photovoltaic panel group.
Step S420: acquiring a second preset difference value, wherein the second preset difference value is smaller than the standard output voltage value, and the calculation formula of the second preset difference value is as follows:
C2＝V1*N+A*Vb，
in the formula, C2Is a second predetermined difference value, V1The voltage annual ageing loss value, expressed as the value of the reduction of the output voltage of the photovoltaic panel due to ageing after each year (for example 0.1V), N being the annual limit value at which the panel has been operated; a is a correction ratio, which is less than 1 (preferably 0.1); vbIs a standard output voltage value.
Specifically, when a single photovoltaic panel fails, the output voltage of the photovoltaic panel is a threshold value of a difference value from a normal standard output voltage value; that is, when the difference between the output voltage of the photovoltaic panel and the normal standard output voltage value is not greater than the second preset value, the output voltage of the photovoltaic panel is reduced within the normal range, and no fault occurs; and if the difference value between the output voltage of the photovoltaic panel and the normal standard output voltage value is larger than the second preset value, the abnormal voltage reduction of the photovoltaic panel occurs, namely, a fault occurs.
Step S430: and judging whether a sub-voltage value with a difference value larger than a second preset difference value with the standard output voltage value exists or not.
If yes, go to step S440: and determining the photovoltaic panel corresponding to the sub-voltage value with the difference value larger than the second preset difference value as the failed photovoltaic panel.
The purpose of this embodiment is to provide a technical solution for how to determine a failed photovoltaic panel.
In a fifth embodiment of the photovoltaic detection method provided by the present invention, based on the fourth embodiment, step S430 further includes the following steps:
if yes, go to step S510: and judging whether the sub-voltage value corresponding to the photovoltaic panel with the fault is 0 or not.
Step S520: and when the sub-voltage value corresponding to the failed photovoltaic panel is 0, marking the photovoltaic panel with the sub-voltage value of 0 as a damaged panel.
Specifically, on the basis of the fourth embodiment, it can be further determined whether the sub-voltage value corresponding to the failed photovoltaic panel is 0, and if the sub-voltage value corresponding to the failed photovoltaic panel is 0, it can be determined that the photovoltaic panel has stopped working, and the failure is determined to occur, so that the photovoltaic panel with the sub-voltage value of 0 can be directly marked as a damaged panel.
In a sixth embodiment of the photovoltaic detection method provided by the present invention, based on the fourth embodiment, step S430 further includes the following steps:
if not, go to step S610: judging whether all the sub-voltage values meet the following conditions: there are sub-voltage values that are less than the standard output voltage value and all sub-voltage values are not 0.
Step S620: and when the sub-voltage values smaller than the standard output voltage value exist and all the sub-voltage values are not 0, marking the abnormal plate group as a plate group to be analyzed.
Specifically, when the sub-voltage values smaller than the standard output voltage value exist and all the sub-voltage values are not 0, it is indicated that all the photovoltaic panels are working, and only the overall output voltage of the photovoltaic panel group is lower than the average level, which is very likely to be caused by sudden shielding of cloud layers or dust on the photovoltaic panels, and further analysis is needed.
In a seventh embodiment of the photovoltaic detection method provided by the present invention, based on the sixth embodiment, step S620 further includes the following steps:
step S710: and acquiring a plate group voltage value sent by a detection module corresponding to the plate group to be analyzed once every preset time within a preset time period, and marking the plate group voltage value as the voltage value to be analyzed, wherein the preset time period is the time period corresponding to the current time section in the daytime.
Specifically, the preset time period is preferably 6 am to 6 pm, and the preset time period is preferably 1 hour.
Step S720: and acquiring the voltage value of the average plate set once every preset time within a preset time period.
Step S730: and judging whether the voltage values to be analyzed at the same moment are all smaller than the voltage value of the average plate group.
If yes, go to step S740: and marking the plate group to be analyzed as a plate group to be cleaned.
Specifically, if the voltage values to be analyzed obtained every preset time within one day are all smaller than the average plate set voltage value, the situation that the output voltage of the photovoltaic plate set is reduced due to sudden cloud shielding can be eliminated; the decrease in the output voltage of the set of plates to be analyzed is due to the accumulation of dust.
In an eighth embodiment of the photovoltaic detection method provided by the present invention, based on the seventh embodiment, the system further includes a camera and a display, which are in communication connection with the host; the number of the cameras is multiple; each camera is used for shooting a real-time image of the photovoltaic panel set; step S750, the following steps are also included thereafter:
step S810: and acquiring a real-time image shot by a camera closest to the to-be-cleaned ash plate group.
Step S820: and carrying out image analysis on the real-time image to judge whether the dust cleaning plate group to be cleaned has shielding foreign matters.
If yes, go to step S830: and displaying the real-time image through the display.
The real-time image of the to-be-cleaned board group is obtained through the camera, then whether shielding foreign matters exist in the to-be-cleaned board group or not is further analyzed and judged through image analysis (for example, transparent plastic foreign matters can also cause output voltage reduction, but the output voltage is not 0), and if yes, the real-time image is displayed through the display to remind operation and maintenance personnel to process in time.
In a ninth embodiment of the photovoltaic detection method provided by the present invention, based on the first embodiment, each photovoltaic panel is correspondingly provided with a unique panel number, and the panel number mark is displayed on the back surface of the photovoltaic panel; each detection switch is correspondingly provided with a unique switch number; the system also includes a display communicatively coupled to the host; step S150, the following steps are also included thereafter:
step S910: and acquiring a plate number and a switch number corresponding to the failed photovoltaic plate, and packaging to form fault information.
Step S920: and displaying the fault information through the display.
Specifically, the present embodiment aims to provide a method for displaying fault information through a display in time to remind operation and maintenance personnel to handle faults in time.
The invention also provides a photovoltaic detection system, which is applied to the photovoltaic detection method; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor; each photovoltaic panel in the photovoltaic panel group corresponds to the detection switches one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switches are connected between the photovoltaic panels and the voltage sensors in series.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a ROM/RAM, a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A photovoltaic detection method is characterized by being applied to a photovoltaic detection system; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the plurality of voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor; each photovoltaic plate in the photovoltaic plate group corresponds to the detection switch one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switch is connected between the photovoltaic panel and the voltage sensor in series; the method comprises the following steps:
acquiring a plate group voltage value sent by a detection module through the host, wherein the plate group voltage value is an output voltage value of the whole photovoltaic plate group detected by a voltage sensor when all detection switches in the detection module are switched on, and the plate group voltage value corresponds to the photovoltaic plate groups one by one;
determining a photovoltaic panel group with a fault based on all panel group voltage values, and marking the photovoltaic panel group with the fault as an abnormal panel group;
all detection switches in the detection module corresponding to the abnormal plate group are switched off and then switched on in sequence, and the voltage value detected by the voltage sensor when each detection switch is switched on is marked as a sub-voltage value, wherein each photovoltaic plate corresponds to a unique sub-voltage value;
and marking all the sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the photovoltaic plate with the fault in the abnormal plate group based on the detection voltage set.
2. The method for detecting photovoltaic, according to claim 1, wherein the determining the faulty pv panel group based on all panel group voltage values and marking the faulty pv panel group as an abnormal panel group includes:
obtaining an average plate group voltage value based on the plate group voltage values corresponding to all the photovoltaic plate groups;
acquiring a difference value between the voltage value of each plate group and the average plate group voltage value, and marking as a plate group difference value;
acquiring a first preset difference value;
and marking the photovoltaic panel group corresponding to the panel group difference value larger than the preset difference value as an abnormal panel group.
3. The photovoltaic detection method according to claim 2, wherein the obtaining the first preset difference value includes:
acquiring a standard output voltage value of a single photovoltaic panel in a photovoltaic panel group;
and taking the standard output voltage value of a single photovoltaic panel in the photovoltaic panel group as the first preset difference value.
4. The photovoltaic detection method according to claim 2, wherein the step of marking all the sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the failed photovoltaic plate in the abnormal plate group based on the detection voltage set comprises:
acquiring a standard output voltage value of a single photovoltaic panel in a photovoltaic panel group;
acquiring a second preset difference value, wherein the second preset difference value is smaller than the standard output voltage value;
judging whether a sub-voltage value with a difference value larger than a second preset difference value with the standard output voltage value exists or not;
and if so, determining the photovoltaic panel corresponding to the sub-voltage value with the difference value larger than the second preset difference value with the standard output voltage value as the failed photovoltaic panel.
5. The photovoltaic detection method according to claim 4, wherein the determining whether there is a sub-voltage value having a difference from the standard output voltage value greater than a second preset difference further comprises:
if yes, judging whether the sub-voltage value corresponding to the photovoltaic panel with the fault is 0 or not;
and when the sub-voltage value corresponding to the failed photovoltaic panel is 0, marking the photovoltaic panel with the sub-voltage value of 0 as a damaged panel.
6. The photovoltaic detection method according to claim 4, wherein the determining whether there is a sub-voltage value having a difference from the standard output voltage value greater than a second preset difference further comprises:
if not, judging whether all the sub-voltage values meet the following conditions: the sub-voltage value smaller than the standard output voltage value exists, and all the sub-voltage values are not 0;
and when the sub-voltage values smaller than the standard output voltage value exist and all the sub-voltage values are not 0, marking the abnormal plate group as a plate group to be analyzed.
7. The method according to claim 6, wherein when there are sub-voltage values smaller than the standard output voltage value and all the sub-voltage values are not 0, the abnormal plate group is marked as the plate group to be analyzed, and then the method further comprises:
acquiring a plate group voltage value sent by a detection module corresponding to the plate group to be analyzed every other preset time within a preset time period, and marking the plate group voltage value as the voltage value to be analyzed, wherein the preset time period is the time period corresponding to the current time section in the daytime;
acquiring an average plate group voltage value once every preset time within a preset time period;
judging whether the voltage values to be analyzed at the same moment are all smaller than the voltage value of the average plate group;
and if so, marking the plate group to be analyzed as a plate group to be cleaned.
8. The photovoltaic detection method of claim 7, wherein the system further comprises a camera and a display communicatively connected to the host; the number of the cameras is multiple; each camera is used for shooting a real-time image of the photovoltaic panel set; the method comprises the following steps of marking the group of plates to be analyzed as a group of plates to be cleaned, and then:
acquiring a real-time image shot by a camera closest to the to-be-cleaned board group;
performing image analysis on the real-time image to judge whether a to-be-cleaned board group has shielding foreign matters;
and if so, displaying the real-time image through the display.
9. The photovoltaic detection method according to claim 1, wherein each photovoltaic panel is correspondingly provided with a unique panel number, and the panel number mark is displayed on the back of the photovoltaic panel; each detection switch is correspondingly provided with a unique switch number; the system also includes a display communicatively coupled to the host; marking all sub-voltage values sent by the detection module corresponding to the abnormal plate group as a detection voltage set, and determining the photovoltaic plate with the fault in the abnormal plate group based on the detection voltage set, and then further comprising:
acquiring a plate number and a switch number corresponding to a failed photovoltaic plate, and packaging to form failure information;
and displaying the fault information through the display.
10. A photovoltaic detection system, characterized by being applied to the photovoltaic detection method according to any one of claims 1 to 9; the system comprises a detection module and a host; the number of the detection modules is consistent with that of the photovoltaic panel groups, and the detection modules correspond to the photovoltaic panel groups one by one; the detection module comprises a controller, a plurality of voltage sensors and a plurality of detection switches; the voltage sensors are in communication connection with the controller; the controller is in communication connection with the host; the number of the voltage sensors is consistent with that of the detection switches, and the voltage sensors correspond to the detection switches one by one; each photovoltaic plate in the photovoltaic plate group corresponds to the voltage sensor one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding voltage sensor;
each photovoltaic plate in the photovoltaic plate group corresponds to the detection switch one by one; the voltage signal detection line of each photovoltaic panel in the photovoltaic panel group is connected with the corresponding detection switch in series, and the detection switch is connected between the photovoltaic panel and the voltage sensor in series.
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| CN115911187A (en) * | 2023-03-08 | 2023-04-04 | 广东联塑班皓新能源科技集团有限公司 | Intelligent processing system based on photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115911187A (en) * | 2023-03-08 | 2023-04-04 | 广东联塑班皓新能源科技集团有限公司 | Intelligent processing system based on photovoltaic module |
| CN115911187B (en) * | 2023-03-08 | 2023-06-30 | 广东联塑班皓新能源科技集团有限公司 | Intelligent processing system based on photovoltaic module |
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