CN112180792B - Alarm processing method and device for photovoltaic system and monitoring equipment - Google Patents
Alarm processing method and device for photovoltaic system and monitoring equipment Download PDFInfo
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- CN112180792B CN112180792B CN202011060805.7A CN202011060805A CN112180792B CN 112180792 B CN112180792 B CN 112180792B CN 202011060805 A CN202011060805 A CN 202011060805A CN 112180792 B CN112180792 B CN 112180792B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24024—Safety, surveillance
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- 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
Abstract
The application provides a photovoltaic system alarm processing method, a photovoltaic system alarm processing device and monitoring equipment. If the electrical parameter data of the string is abnormal and not matched with the shielding characteristics, outputting an alarm generated aiming at the electrical parameter data abnormity. According to the process, the alarm generated by shielding of the fixed object can be identified, the alarm information can be shielded, other fault alarm information cannot be shielded, the phenomenon that the fault alarm is missed and not shielded can be avoided by adopting the scheme, further fault expansion is avoided, and the safety of the photovoltaic system is improved.
Description
Technical Field
The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic system alarm processing method, a photovoltaic system alarm processing device and monitoring equipment.
Background
With the gradual maturity of photovoltaic power generation technology, photovoltaic power generation systems are applied more and more. With the increase of photovoltaic power generation systems, the total unobstructed field is less and less, and in order to make full use of the installation area of the field, a part of fixed objects such as telegraph poles, walls, distribution boxes, front row assembly shelters and the like are received.
A fixture in a photovoltaic system installation field can prevent sunlight from irradiating a photovoltaic assembly, namely, the shadow of the fixture covers the photovoltaic assembly, so that the current, power and other electric parameters of the photovoltaic assembly are changed, and when the change exceeds a certain threshold value, the photovoltaic system can be triggered to alarm. However, when the shadow sheltered by the fixture disappears, the electric parameters of the photovoltaic string can be automatically restored, and therefore, the alarm does not need to be concerned. In the related art, the alarm generated by the shielded photovoltaic string is directly shielded, but the mode of shielding the alarm generated by the shielded photovoltaic string is to shield all alarms generated by the photovoltaic string, so that the fault alarm when the photovoltaic string of the path really fails may be missed, and further the fault amplification is caused.
Disclosure of Invention
In view of this, an object of the present invention is to provide a method, an apparatus, and a monitoring device for alarm processing of a photovoltaic system, so as to solve the problem in the related art that failure alarm is missed due to directly shielding alarm information of a certain path of photovoltaic string, and a disclosed technical scheme is as follows:
in a first aspect, the present application provides a method for processing an alarm of a photovoltaic system, which is applied to a photovoltaic system with a fixed object shielding, and the method includes:
acquiring electrical parameter data of each photovoltaic power generation component in the photovoltaic system;
obtaining shielding characteristics corresponding to the photovoltaic power generation component in a current preset period according to the electrical parameter data of the photovoltaic power generation component, wherein the shielding characteristics represent the change characteristics of the electrical parameter data of the photovoltaic power generation component shielded by a fixed object in one preset period;
when the corresponding electric parameter data of the photovoltaic power generation component is matched with the shielding characteristic, shielding alarm information generated by the photovoltaic power generation component aiming at the abnormal electric parameter data;
and when the electric parameter data corresponding to the photovoltaic power generation component is not matched with the shielding characteristics, outputting alarm information generated by the photovoltaic power generation component aiming at the abnormal electric parameter data.
Optionally, the step of determining whether the electrical parameter data corresponding to the photovoltaic power generation component matches the occlusion feature includes:
calculating deviation characteristic data corresponding to the electrical parameters according to the electrical parameter data corresponding to the photovoltaic power generation component, wherein the deviation characteristic data represent the deviation condition between the electrical parameter data and corresponding normal values;
if the deviation characteristic data of the electrical parameter is in the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electrical parameter data in the shielding characteristic, determining that the electrical parameter data is matched with the shielding characteristic;
and if the deviation characteristic data of the electrical parameter exceeds the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electrical parameter data in the shielding characteristic, determining that the electrical parameter data is not matched with the shielding characteristic.
Optionally, the obtaining, according to the electrical parameter data of the photovoltaic power generation component, a shielding characteristic corresponding to the photovoltaic power generation component in a current preset period includes:
aiming at a photovoltaic power generation component which is shielded by a fixed object and does not have a fault, acquiring a first data characteristic of time-varying electrical parameter data corresponding to the photovoltaic power generation component in a historical preset period;
and calculating to obtain the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic, the geographic position of the photovoltaic system and the solar azimuth corresponding to the current preset period.
Optionally, calculating, according to the first data feature, the geographic position of the photovoltaic system, and the solar azimuth angle corresponding to the current preset period, an occlusion feature corresponding to the photovoltaic power generation component in the current preset period includes:
calculating the solar azimuth angle deviation corresponding to the historical preset period and the current preset period at the same moment;
and calculating to obtain the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic corresponding to the historical preset period and the solar azimuth deviation corresponding to each moment in the preset period.
Optionally, the method further comprises:
when the fact that shielding of a fixed object in the photovoltaic system is changed is detected, acquiring a first data characteristic corresponding to a photovoltaic power generation component influenced by the shielding of the changed fixed object;
updating the latest first data characteristic corresponding to the photovoltaic power generation component into a database.
Optionally, the process of detecting whether fixture shading in the photovoltaic system changes includes:
acquiring a current environment image corresponding to the overall environment of the photovoltaic system;
performing image recognition on the current environment image to obtain current fixture shielding existing in the overall environment of the photovoltaic system;
comparing the current fixture occlusion to already labeled fixture occlusions in the photovoltaic system;
and if the unmarked fixture shielding exists in the current fixture shielding, determining that the fixture shielding in the photovoltaic system is changed.
Optionally, the preset period comprises one day, one week, one month, one quarter or one year.
Optionally, before obtaining the occlusion feature corresponding to the current preset period of the photovoltaic power generation component, the method further includes:
detecting whether the electrical parameter data of the photovoltaic power generation component is abnormal or not;
and when the electrical parameter data is smaller than the normal value of the electrical parameter, or the deviation rate of the electrical parameter data is larger than a preset deviation rate threshold value, determining that the electrical parameter data is abnormal.
In a second aspect, the present application further provides a photovoltaic system alarm processing apparatus, which is applied to a photovoltaic system with a fixed object shielding, and the apparatus includes:
the first acquisition module is used for acquiring the electric parameter data of each photovoltaic power generation component in the photovoltaic system;
the second acquisition module is used for acquiring the shielding characteristics corresponding to the photovoltaic power generation component in the current preset period, and the shielding characteristics represent the change characteristics of the electrical parameter data of the photovoltaic power generation component shielded by a fixed object in one preset period;
the judging module is used for judging whether the electric parameter data corresponding to the photovoltaic power generation component is matched with the shielding characteristics;
the alarm shielding module is used for shielding alarm information generated by abnormity of the electric parameter data of the photovoltaic power generation component when the corresponding electric parameter data of the photovoltaic power generation component is matched with the shielding characteristic;
and the alarm output module is used for outputting alarm information generated by abnormity of the electric parameter data of the photovoltaic power generation component when the electric parameter data corresponding to the photovoltaic power generation component is not matched with the shielding characteristics.
Optionally, the determining module includes:
the deviation characteristic data calculation submodule is used for calculating deviation characteristic data corresponding to the electric parameters according to the electric parameter data corresponding to the photovoltaic power generation component, and the deviation characteristic data represent the deviation condition between the electric parameter data and corresponding normal values;
the first determining submodule is used for determining that the electric parameter data is matched with the shielding characteristic when the deviation characteristic data of the electric parameter is in the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data;
and the second determining submodule is used for determining that the electric parameter data is not matched with the shielding characteristic when the deviation characteristic data of the electric parameter exceeds the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data.
Optionally, the second obtaining module includes:
the first data characteristic acquisition sub-module is used for acquiring a first data characteristic of the change of corresponding electrical parameter data of the photovoltaic power generation component along with time in a historical preset period aiming at the photovoltaic power generation component which is shielded by a fixed object and does not have a fault;
and the shielding characteristic obtaining sub-module is used for calculating and obtaining the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic, the geographic position of the photovoltaic system and the solar azimuth angle corresponding to the current preset period.
Optionally, the occlusion feature obtaining sub-module includes:
the sun azimuth deviation calculation submodule is used for calculating the sun azimuth deviation corresponding to the historical preset period and the current preset period at the same moment;
and the shielding characteristic data calculation submodule is used for calculating and obtaining the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic corresponding to the historical preset period and the solar azimuth deviation corresponding to each moment in the preset period.
In a third aspect, the present application further provides a monitoring device, including: a processor and a memory;
the memory has stored therein program instructions;
the processor is configured to call the program instructions stored in the memory and implement the photovoltaic system alarm processing method of any of the first aspect when executed.
According to the alarm processing method of the photovoltaic system, in the photovoltaic system with known fixed object shielding, after the electric parameter data corresponding to each photovoltaic power generation component in the system are collected, the shielding characteristics corresponding to the photovoltaic power generation component in the current preset period are further obtained, if the electric parameter data are matched with the shielding characteristics, it is determined that the electric parameter data are abnormal due to the shielding of the fixed object, and at the moment, alarm information generated aiming at the electric parameter data abnormality of the photovoltaic power generation component is shielded. And if the electrical parameter data of the photovoltaic power generation component is abnormal and is not matched with the shielding characteristics, outputting alarm information generated aiming at the abnormal electrical parameter data. According to the process, the alarm information generated due to shielding of the fixed object can be identified, the alarm information can be shielded, other fault alarm information cannot be shielded, the phenomenon that the fault alarm is missed and not shielded can be avoided by adopting the scheme, further expansion of faults is avoided, and the safety of the photovoltaic system is 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 in the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of an alarm processing method for a photovoltaic system according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a process of acquiring an occlusion feature of a photovoltaic string according to an embodiment of the present application;
FIG. 3 is a schematic view of an occlusion characteristic curve provided by an embodiment of the present application;
FIG. 4 is a comparison diagram of an occlusion characteristic curve provided by an embodiment of the present application before and after adjustment;
FIG. 5 is a schematic illustration of whether the electrical parameter data matches the occlusion feature provided by an embodiment of the present application;
fig. 6 is a flowchart of another alarm processing method for a photovoltaic system according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of detecting whether fixture shading changes within a photovoltaic power plant according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a photovoltaic system alarm processing device provided in an embodiment of the present application;
fig. 9 is a schematic structural diagram of another photovoltaic system alarm processing device provided in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, a flowchart of a method for processing an alarm of a photovoltaic system, which is provided by the embodiment of the present application, is shown, and the method is applied to a monitoring system of a photovoltaic power station.
The photovoltaic power generation component herein may be the entire string of photovoltaic strings, or, alternatively, one photovoltaic component in the string of photovoltaic strings. The photovoltaic string is used as an example for illustration. In addition, the alarm processing method provided by the application is also suitable for the photovoltaic module level, the accuracy of processing the alarm information by taking the photovoltaic module as a basic unit is higher, but the alarm processing flow of the photovoltaic module is the same as the photovoltaic group string, and the details are not repeated herein.
As shown in fig. 1, the method may include the steps of:
and S110, acquiring electric parameter data of each photovoltaic group string in the photovoltaic system.
The electrical parameter herein may be a current, power, etc. output by the photovoltaic string or the photovoltaic module. And acquiring the electrical parameter data of the photovoltaic string or the photovoltaic module measured by the measuring equipment through the monitoring system, and reading the electrical parameter data from the monitoring system.
In an application scenario of the present application, the measurement device may measure and upload electrical parameter data of the entire photovoltaic string to the monitoring system, and the electrical parameter data of the photovoltaic string in the application scenario is the electrical parameter data of the entire photovoltaic string.
In another application scenario of the present application, the measuring device may measure electrical parameter data of each photovoltaic module in one photovoltaic string and upload the electrical parameter data to the monitoring system, where the electrical parameter data of the photovoltaic string in the application scenario is the electrical parameter data of each photovoltaic module in the photovoltaic string.
And S120, acquiring the shielding characteristics corresponding to the current preset period of the photovoltaic string according to the electrical parameter data.
The shielding characteristic represents the change characteristic of the electrical parameter data of the photovoltaic group string or the photovoltaic module shielded by the fixture in a preset period. The shielding characteristic can be obtained by collecting the electric parameter data of the target photovoltaic group string or the photovoltaic module in a preset period and calculating the electric parameter data.
The photovoltaic string is taken as an example for explanation, and the process of obtaining the shielding feature corresponding to the photovoltaic string in the current preset period is shown in fig. 2, and in addition, the process of obtaining the shielding feature of the photovoltaic module is the same as the process of obtaining the photovoltaic string, which is not repeated here
In an embodiment of the application, after obtaining the electrical parameter data of the photovoltaic string, it may be preliminarily determined whether the electrical parameter data is abnormal, and if so, the shielding feature corresponding to the photovoltaic string is further obtained.
As shown in fig. 2, the process of obtaining the occlusion feature corresponding to the photovoltaic string in the current preset period includes:
s121, aiming at the photovoltaic string which is shielded by a fixed object and does not have a fault, acquiring a first data characteristic of the photovoltaic string, which corresponds to the change of the electrical parameter data along with time in a historical preset period.
In one embodiment of the present application, detecting whether a fixture occlusion exists in a photovoltaic string can be confirmed remotely through videos or images captured by a monitoring camera, an unmanned aerial vehicle, a robot, etc. within a photovoltaic power plant, or confirmed manually on site.
For a photovoltaic string which is shielded by a fixed object and does not have a fault, acquiring electrical parameter data of the photovoltaic string at each moment in a preset period, and calculating a characteristic of the electrical parameter data in the preset period changing along with time, namely a first data characteristic.
The photovoltaic string can be judged whether to have a fault according to the telemetering and remote signaling data obtained by the monitoring system, or the photovoltaic string can be judged whether to have a fault through manually measuring the data of the photovoltaic string and the equipment on site.
In an embodiment of the application, the first data characteristic may be a deviation between the electrical parameter data obtained at each acquisition time in a historical preset period and a normal value corresponding to the time, and the deviation may be characterized by a deviation rate or a dispersion rate.
The first data characteristics can be obtained by calculation according to the change condition of the corresponding electrical parameter data of the photovoltaic string or the photovoltaic module in a historical preset period and stored in a monitoring system of the photovoltaic power station. When the alarm processing method is operated, the shielding characteristic corresponding to the current preset period is obtained through calculation according to the first data characteristic corresponding to the photovoltaic group string stored in the monitoring system.
The preset period may be set according to actual needs, and may be, for example, one day, one week, one month, one quarter, or one year. The shorter the cycle length of the preset cycle, the higher the accuracy of the calculation result, but the larger the calculation amount.
And S122, calculating the solar azimuth angle deviation corresponding to the historical preset period and the current preset period at the same moment.
The solar azimuth angles corresponding to the same time on different dates are different, and the solar azimuth angle corresponding to the geographic position of the photovoltaic power station at the current time can be inquired from a meteorological website.
And S123, calculating to obtain the shielding characteristics corresponding to the photovoltaic string in other preset periods according to the first data characteristics corresponding to the historical preset periods and the solar azimuth deviation corresponding to each moment.
The solar azimuth angles are different, the solar radiation received on the ground is also different, and different solar radiation corresponding to different solar azimuth angles can be calculated by using a formula. The generated energy of the photovoltaic group strings or photovoltaic modules shielded by the fixed objects is different due to different solar radiation, so that the shielding characteristics corresponding to the same moment in the current preset period can be calculated according to the difference of the solar azimuth angles corresponding to the same moment in different preset periods and the first data characteristics corresponding to the historical preset periods.
For example, taking a preset period as one day as an example, after the electrical parameter data characteristics corresponding to a certain photovoltaic group string in 6 months and 1 day are obtained, if the current detection day is 6 months and 3 days, the shielding characteristics corresponding to the photovoltaic module in 6 months and 3 days are obtained by calculating according to the electrical parameter data characteristics corresponding to the 6 months and 1 day, the geographic position of the photovoltaic power station and the solar azimuth angle.
Furthermore, it should be noted that the historical preset period and the current preset period may have different period lengths, for example, the historical preset period is a day, and the current preset period may be a week, a month, a quarter, a year, or the like.
In a possible implementation manner, a curve diagram of the corresponding occlusion characteristics of a certain photovoltaic string in a preset period is shown in fig. 3, where a horizontal axis represents different times in the preset period, and a vertical axis represents a deviation rate between an electrical parameter of the photovoltaic string and a normal value, or a dispersion rate of the electrical parameter.
In another embodiment of the present application, in order to avoid false alarm caused by detection accuracy, and improve robustness, after the characteristic of the electrical parameter data that corresponds to the current preset period and changes with time is obtained through calculation according to the first data characteristic, the deviation rate range of the electrical parameter is appropriately expanded, for example, as shown in fig. 4, a curve B' is adjusted to a curve B, and finally, the curve B is used as a shielding characteristic curve corresponding to the photovoltaic group string.
S130, judging whether the electric parameter data is matched with the shielding characteristics corresponding to the photovoltaic string; if so, go to S140; if not, S150 is performed.
In an embodiment of the present application, taking a photovoltaic string as an example for explanation, the process of determining whether the shielding features corresponding to the electrical parameter data and the photovoltaic string are matched may include:
calculating deviation characteristic data corresponding to the electrical parameters according to the electrical parameter data corresponding to the photovoltaic group strings, wherein the deviation characteristic data represents the deviation condition between the electrical parameter data and corresponding normal values;
if the deviation characteristic data of the electrical parameter is in the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electrical parameter data in the shielding characteristic, determining that the electrical parameter data is matched with the shielding characteristic;
and if the deviation characteristic data of the electrical parameter exceeds the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electrical parameter data in the shielding characteristic, determining that the electrical parameter data is not matched with the shielding characteristic.
As shown in fig. 5, it is assumed that at time t1, the deviation ratio (or the dispersion ratio) of the electrical parameter obtained by calculation according to the measured electrical parameter data of the photovoltaic string is D1, and D1 is located in the deviation ratio value range corresponding to the occlusion characteristic curve at time t1, and it is determined that the electrical parameter data at time t1 matches the occlusion characteristic.
Assuming that at time t2, the deviation ratio (or dispersion ratio) of the electrical parameter corresponding to the photovoltaic string is D2, and D2 exceeds the value range of the deviation ratio corresponding to the known shading curve at time t2, it is determined that the electrical parameter data corresponding to time t2 does not match the shading characteristics.
And S140, shielding alarm information generated by the abnormity of the electric parameter data of the photovoltaic string.
If the fact that the electrical parameter data of a certain photovoltaic string is matched with the shielding characteristics is determined, it is indicated that the electrical parameter data of the photovoltaic string is abnormal due to shielding of a fixed object, at the moment, alarm information generated by a monitoring system aiming at the electrical parameter data abnormality of the photovoltaic string is shielded, and the alarm information does not need to be reported.
And S150, outputting alarm information generated by the photovoltaic string aiming at the abnormal electrical parameter data.
The photovoltaic string is taken as an example for explanation, if it is determined that the electrical parameter data of a certain photovoltaic string is not matched with the shielding characteristics, it is indicated that the electrical parameter data is abnormal not due to shielding of a fixed object, and possibly due to abnormality of a photovoltaic module, other equipment or a line, and at this time, alarm information generated by the monitoring system for the abnormality of the electrical parameter data is normally reported.
In the alarm processing method for the photovoltaic system provided by the embodiment, in the photovoltaic system with known blocking of a fixed object, after the electric parameter data corresponding to each photovoltaic string in the system is acquired, the blocking characteristic corresponding to the photovoltaic string in the current preset period is further acquired, if the electric parameter data is matched with the blocking characteristic, it is determined that the electric parameter data is abnormal due to blocking of the fixed object, and at this time, alarm information generated by abnormal electric parameter data of the photovoltaic string is shielded. And if the electrical parameter data of the group of strings has abnormality and is not matched with the shielding characteristics, outputting alarm information generated aiming at the abnormality of the electrical parameter data. According to the process, the alarm information generated due to shielding of the fixed object can be identified, the alarm information can be shielded, other fault alarm information cannot be shielded, the phenomenon that the fault alarm is missed and not shielded can be avoided by adopting the scheme, further expansion of faults is avoided, and the safety of the photovoltaic system is improved.
Referring to fig. 6, a flowchart of another alarm processing method for a photovoltaic system provided in the embodiment of the present application is shown, and as shown in fig. 6, the method further includes the following steps based on the embodiment shown in fig. 1:
s210, when the fact that shielding of a fixed object in the photovoltaic power station is changed is detected, first data characteristics corresponding to photovoltaic string influenced by the shielding of the changed fixed object are obtained.
Whether the shielding of a fixed object in the photovoltaic power station is changed or not can be detected in real time according to a certain period or according to video monitoring. The period here may be set according to actual needs, for example, may be set to one day, one week, one month, or one quarter.
In other embodiments of the present application, it can also be determined whether fixture shading has changed by manually going to the photovoltaic power station site.
In one embodiment of the present application, whether fixture shielding inside a photovoltaic power station changes can be detected through a photographed image of the photovoltaic power station, as shown in fig. 7, the following steps can be included:
s211, acquiring a current environment image corresponding to the overall environment of the photovoltaic power station.
The image of photovoltaic power plant can be shot through the camera of installation in the photovoltaic power plant, perhaps, can also shoot through unmanned aerial vehicle or robot and obtain.
S212, performing image recognition on the current environment image to obtain the current fixture shielding existing in the overall environment of the photovoltaic power station.
And identifying fixture occlusion contained in the image of the photovoltaic power station through an image identification algorithm.
S213, comparing the current fixture occlusion with the already marked fixture occlusion in the photovoltaic power station.
And comparing the shielding of the fixed objects contained in the shot latest image of the photovoltaic power station with the shielding of the fixed objects marked in the photovoltaic power station one by one, and judging whether the latest image contains the shielding of the unmarked new fixed objects or whether the shielding of the marked fixed objects changes.
S214, if the shielding of the unmarked fixed objects exists in the shielding of the current fixed objects or the shielding of the marked fixed objects changes, the shielding of the fixed objects in the photovoltaic power station is determined to change.
The process of acquiring the first data characteristic of the photovoltaic string blocked by the fixed object is the same as the process of S121, and is not described herein again.
And S220, updating the latest first data characteristic corresponding to the photovoltaic group string into a database.
Occlusion variation scenarios may include: the photovoltaic string which is not shielded by the fixed object originally is shielded by the fixed object; or the number of the fixed objects influenced by the shielding of the photovoltaic string with fixed object shielding is increased/decreased; or, the photovoltaic string originally shielded by the fixture becomes free of fixture shielding.
Accordingly, updating the first data characteristic of the photovoltaic string includes: replacing a first data characteristic corresponding to a photovoltaic string stored in a monitoring system with a latest first data characteristic; or deleting the first data characteristics corresponding to the photovoltaic group string stored in the database; or, newly adding a first data characteristic corresponding to a certain photovoltaic group string.
And calculating to obtain the shielding characteristic corresponding to the photovoltaic group string in the current preset period by using the latest first data characteristic corresponding to the photovoltaic group string in the subsequent alarm processing flow.
According to the alarm processing method of the photovoltaic system, whether shielding of a fixed object in a photovoltaic power station changes or not is periodically detected, if the shielding of the fixed object changes, characteristics of time-varying electrical parameters of a photovoltaic string in a preset period, which are influenced by the shielding of the changed fixed object, are acquired, and the data characteristics are updated to a database, so that a subsequent alarm processing flow uses the latest data characteristics to calculate and obtain the shielding characteristics, and the accuracy and the reliability of alarm processing are improved.
Referring to fig. 8, a schematic structural diagram of an alarm processing apparatus of a photovoltaic system according to an embodiment of the present application is shown, and as shown in fig. 8, the apparatus includes:
the first obtaining module 110 is configured to obtain electrical parameter data of each photovoltaic power generation component in the photovoltaic system.
The second obtaining module 120 is configured to obtain a shading feature corresponding to the photovoltaic power generation component in a current preset period, where the shading feature represents a change feature of an electrical parameter data of a photovoltaic group string or a photovoltaic module shaded by a fixture in a preset period.
In one embodiment of the present application, the second obtaining module 120 may include:
the first data characteristic acquisition sub-module is used for acquiring a first data characteristic of the change of the corresponding electrical parameter data of the photovoltaic power generation component along with time in a historical preset period aiming at the photovoltaic power generation component which is shielded by a fixed object and does not have a fault;
and the shielding characteristic obtaining submodule is used for calculating and obtaining the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic, the geographic position of the photovoltaic system and the solar azimuth angle corresponding to the current preset period.
In one embodiment of the present application, the occlusion feature acquisition sub-module may include:
and the sun azimuth deviation calculation submodule is used for calculating the sun azimuth deviation corresponding to the historical preset period and the current preset period at the same moment.
And the shielding characteristic data calculation submodule is used for calculating and obtaining the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic corresponding to the historical preset period and the solar azimuth deviation corresponding to each moment in the preset period.
The judging module 130 is configured to judge whether the electrical parameter data corresponding to the photovoltaic power generation component matches the occlusion feature.
In one embodiment of the present application, the determining module 130 includes:
and the deviation characteristic data calculation submodule is used for calculating deviation characteristic data corresponding to the electrical parameters according to the electrical parameter data corresponding to the photovoltaic power generation component, and the deviation characteristic data represents the deviation condition between the electrical parameter data and the corresponding normal value.
The first determining submodule is used for determining that the electric parameter data is matched with the shielding characteristic when the deviation characteristic data of the electric parameter is in the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data;
and the second determining submodule is used for determining that the electric parameter data is not matched with the shielding characteristic when the deviation characteristic data of the electric parameter exceeds the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data.
And the alarm shielding module 140 is configured to shield alarm information generated by an abnormal electrical parameter data of the photovoltaic power generation component when the corresponding electrical parameter data of the photovoltaic power generation component matches with the shielding feature.
And the alarm output module 150 is used for outputting alarm information generated by abnormity of the electric parameter data of the photovoltaic power generation component when the electric parameter data corresponding to the photovoltaic power generation component is not matched with the shielding characteristics.
According to the photovoltaic system alarm processing device, in a known photovoltaic system with fixed object shielding, after electric parameter data corresponding to each photovoltaic power generation component in the system are acquired, shielding characteristics corresponding to the photovoltaic power generation component in a current preset period are further acquired, if the electric parameter data are matched with the shielding characteristics, it is determined that the electric parameter data are abnormal due to shielding of the fixed object, and at the moment, alarm information generated aiming at the abnormal electric parameter data of the photovoltaic power generation component is shielded. And if the electrical parameter data of the group of strings has abnormality and is not matched with the shielding characteristics, outputting alarm information generated aiming at the abnormality of the electrical parameter data. According to the process, the alarm information generated due to shielding of the fixed object can be identified, the alarm information can be shielded, other fault alarm information cannot be shielded, the phenomenon that the fault alarm is missed and not shielded can be avoided by adopting the scheme, further expansion of faults is avoided, and the safety of the photovoltaic system is improved.
Referring to fig. 9, a schematic structural diagram of another photovoltaic system alarm processing apparatus provided in the embodiment of the present application is shown, where the apparatus further includes, on the basis of the embodiment shown in fig. 8:
a third obtaining module 210, configured to obtain a first data feature corresponding to a photovoltaic power generation component affected by occlusion of a changing fixture when a change in fixture occlusion in the photovoltaic system is detected.
In an embodiment of the present application, the third obtaining module 210 is specifically configured to:
acquiring a current environment image corresponding to the overall environment of the photovoltaic system;
performing image recognition on a current environment image to obtain current fixture shielding existing in the overall environment of the photovoltaic system;
comparing the current fixture occlusion with the already marked fixture occlusion in the photovoltaic system;
and if the unmarked fixture shielding exists in the current fixture shielding, determining that the fixture shielding in the photovoltaic system is changed.
And the data characteristic updating module 220 is used for updating the latest first data characteristic corresponding to the photovoltaic power generation component into the database.
In another embodiment of the present application, the apparatus further comprises:
an anomaly detection module 230, configured to detect whether the electrical parameter data of the photovoltaic power generation component is abnormal;
and an anomaly determination module 240, configured to determine that the electrical parameter data is anomalous when the electrical parameter data is smaller than a normal value of the electrical parameter, or a deviation rate of the electrical parameter data is greater than a preset deviation rate threshold.
The alarm processing device of the photovoltaic system provided by the embodiment periodically detects whether the shielding of a fixed object in the photovoltaic power station changes, if so, the device acquires the characteristic that the electrical parameter number of a photovoltaic string influenced by the shielding of the changed fixed object changes along with time in a preset period, and updates the data characteristic to the database, so that the subsequent alarm processing flow uses the latest data characteristic to calculate to obtain the shielding characteristic, and the accuracy and reliability of alarm processing are improved.
In another aspect, the present application further provides a monitoring device including a processor and a memory, where the memory stores a program executable on the processor. When the processor runs the program stored in the memory, any one of the above alarm processing methods of the photovoltaic system is realized.
The application also provides a storage medium executable by the computing device, wherein the storage medium stores a program, and the program is executed by the computing device to realize the alarm processing method of the photovoltaic system.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
It should be noted that technical features described in the embodiments in the present specification may be replaced or combined with each other, each embodiment is mainly described as a difference from the other embodiments, and the same and similar parts between the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The steps in the method of the embodiments of the present application may be sequentially adjusted, combined, and deleted according to actual needs.
The device and the modules and sub-modules in the terminal in the embodiments of the present application can be combined, divided and deleted according to actual needs.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal, apparatus and method may be implemented in other manners. For example, the above-described terminal embodiments are merely illustrative, and for example, the division of a module or a sub-module is only one logical division, and there may be other divisions when the terminal is actually implemented, for example, a plurality of sub-modules or modules may be combined or integrated into another module, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules or sub-modules described as separate parts may or may not be physically separate, and parts that are modules or sub-modules may or may not be physical modules or sub-modules, may be located in one place, or may be distributed over a plurality of network modules or sub-modules. Some or all of the modules or sub-modules can be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional module or sub-module in the embodiments of the present application may be integrated into one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated into one module. The integrated modules or sub-modules may be implemented in the form of hardware, or may be implemented in the form of software functional modules or sub-modules.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A photovoltaic system alarm processing method is applied to a photovoltaic system with fixture shielding, and comprises the following steps:
acquiring electrical parameter data of each photovoltaic power generation component in the photovoltaic system;
aiming at a photovoltaic power generation component which is shielded by a fixed object and does not have a fault, acquiring a first data characteristic of time-varying electrical parameter data corresponding to the photovoltaic power generation component in a historical preset period;
calculating the solar azimuth angle deviation of the historical preset period and the current preset period at the same moment, wherein the solar azimuth angles corresponding to the same moment on different dates are different;
calculating and obtaining shielding characteristics corresponding to the photovoltaic power generation component in the current preset period according to first data characteristics corresponding to the historical preset period and the solar azimuth angle deviation corresponding to each moment in the preset period, wherein the shielding characteristics are curves representing deviation conditions between electrical parameters corresponding to the photovoltaic power generation component at different moments in the preset period and normal values;
when the corresponding electric parameter data of the photovoltaic power generation component is matched with the shielding characteristic, shielding alarm information generated by the photovoltaic power generation component aiming at the abnormal electric parameter data;
and when the electric parameter data corresponding to the photovoltaic power generation component is not matched with the shielding characteristics, outputting alarm information generated by the photovoltaic power generation component aiming at the abnormal electric parameter data.
2. The method of claim 1, wherein the step of determining whether the electrical parameter data corresponding to the photovoltaic power generation component matches the occlusion feature comprises:
calculating deviation characteristic data corresponding to the electrical parameters according to the electrical parameter data corresponding to the photovoltaic power generation component, wherein the deviation characteristic data represent the deviation condition between the electrical parameter data and corresponding normal values;
if the deviation characteristic data of the electric parameter is in the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electric parameter data in the shielding characteristic, determining that the electric parameter data is matched with the shielding characteristic;
and if the deviation characteristic data of the electrical parameter exceeds the range of the shielding characteristic data at the moment corresponding to the acquisition moment of the electrical parameter data in the shielding characteristic, determining that the electrical parameter data is not matched with the shielding characteristic.
3. The method of claim 1, further comprising:
when the fact that shielding of a fixed object in the photovoltaic system is changed is detected, acquiring a first data characteristic corresponding to a photovoltaic power generation component influenced by the shielding of the changed fixed object;
updating the latest first data characteristic corresponding to the photovoltaic power generation component into a database.
4. The method of claim 3, wherein detecting whether fixture shading in the photovoltaic system changes comprises:
acquiring a current environment image corresponding to the overall environment of the photovoltaic system;
performing image recognition on the current environment image to obtain current fixture shielding existing in the overall environment of the photovoltaic system;
comparing the current fixture occlusion to already labeled fixture occlusions in the photovoltaic system;
and if the unmarked fixture shielding exists in the current fixture shielding, determining that the fixture shielding in the photovoltaic system is changed.
5. The method of claim 1, wherein the preset period comprises one day, one week, one month, one quarter, or one year.
6. The method according to claim 1, wherein before acquiring the shading feature corresponding to the photovoltaic power generation component at the current preset period, the method further comprises:
detecting whether the electrical parameter data of the photovoltaic power generation component is abnormal or not;
and when the electrical parameter data is smaller than the normal value of the electrical parameter, or the deviation rate of the electrical parameter data is larger than a preset deviation rate threshold value, determining that the electrical parameter data is abnormal.
7. A photovoltaic system alarm processing device is applied to a photovoltaic system with fixture shielding, and the device comprises:
the first acquisition module is used for acquiring the electric parameter data of each photovoltaic power generation component in the photovoltaic system;
the second acquisition module is used for acquiring a first data characteristic of the change of the corresponding electrical parameter data of the photovoltaic power generation component along with time in a historical preset period aiming at the photovoltaic power generation component which is shielded by a fixed object and does not have a fault;
the sun azimuth deviation calculation submodule is used for calculating the sun azimuth deviation corresponding to the historical preset period and the current preset period at the same moment, wherein the sun azimuth corresponding to the same moment on different dates is different;
the shielding characteristic data calculation submodule is used for calculating and obtaining the shielding characteristic corresponding to the photovoltaic power generation component in the current preset period according to the first data characteristic corresponding to the historical preset period and the solar azimuth angle deviation corresponding to each moment in the preset period, wherein the shielding characteristic is a curve representing the deviation condition between the electrical parameters corresponding to the photovoltaic power generation component at different moments in the preset period and a normal value;
the judging module is used for judging whether the electric parameter data corresponding to the photovoltaic power generation component is matched with the shielding characteristics;
the alarm shielding module is used for shielding alarm information generated by abnormal electric parameter data of the photovoltaic power generation component when the corresponding electric parameter data of the photovoltaic power generation component is matched with the shielding characteristic;
and the alarm output module is used for outputting alarm information generated by abnormity of the electric parameter data of the photovoltaic power generation component when the electric parameter data corresponding to the photovoltaic power generation component is not matched with the shielding characteristics.
8. The apparatus of claim 7, wherein the determining module comprises:
the deviation characteristic data calculation submodule is used for calculating deviation characteristic data corresponding to the electric parameters according to the electric parameter data corresponding to the photovoltaic power generation component, and the deviation characteristic data represent the deviation condition between the electric parameter data and corresponding normal values;
the first determining submodule is used for determining that the electric parameter data is matched with the shielding characteristic when the deviation characteristic data of the electric parameter is in the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data;
and the second determining submodule is used for determining that the electric parameter data is not matched with the shielding characteristic when the deviation characteristic data of the electric parameter exceeds the shielding characteristic data range of the shielding characteristic at the moment corresponding to the acquisition moment of the electric parameter data.
9. A monitoring device, comprising: a processor and a memory;
the memory has stored therein program instructions;
the processor is used for calling the program instructions stored in the memory and implementing the photovoltaic system alarm processing method of any one of claims 1-6 when the program instructions are executed.
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