CN117439540A - PR value monitoring system for photovoltaic station - Google Patents

PR value monitoring system for photovoltaic station Download PDF

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CN117439540A
CN117439540A CN202311132084.XA CN202311132084A CN117439540A CN 117439540 A CN117439540 A CN 117439540A CN 202311132084 A CN202311132084 A CN 202311132084A CN 117439540 A CN117439540 A CN 117439540A
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photovoltaic
data
unit
area
value
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马聪永
张瑞
王丽
田元
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Huaneng International Power Co ltd Hebei Clean Energy Branch
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Huaneng International Power Co ltd Hebei Clean Energy Branch
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    • H—ELECTRICITY
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    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • 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
    • H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells

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Abstract

The invention discloses a PR value monitoring system of a photovoltaic station, which divides photovoltaic areas according to rated power of each component in the photovoltaic station, acquires ideal generating capacity and actual generating capacity data of the photovoltaic areas, performs statistical analysis, calculates and records PR values of each photovoltaic area; drawing a trend graph by utilizing a statistical analysis module according to the historical record of PR values so as to analyze the efficiency trend of the photovoltaic area; identifying a photovoltaic region with abnormal efficiency by comparing with a preset standard of PR values, and further acquiring information of an abnormal photovoltaic module; the abnormal region information and the abnormal component information are displayed in an alarm mode, and the alarm information is sent to terminal equipment of maintenance personnel; the invention can help the photovoltaic station monitor the power generation efficiency in real time, avoid the problem of inaccurate PR value calculation caused by different rated efficiency of the photovoltaic modules, quickly find and process abnormal efficiency, lock the area information of the abnormal modules in each area and improve the operation efficiency and stability of the photovoltaic power generation system.

Description

PR value monitoring system for photovoltaic station
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a PR value monitoring system of a photovoltaic station.
Background
PR value is an important index for measuring photovoltaic power generation efficiency; the method is used for representing the ratio of the actual power generation amount to the theoretical power generation amount of the photovoltaic module; the theoretical generated energy is the expected generated energy calculated according to parameters such as illumination intensity, rated power of the photovoltaic module, effective area of the photovoltaic module and the like; the closer the PR value is to 1, the actual power generation amount of the photovoltaic field station is close to the theoretical power generation amount, namely the photovoltaic system performance is good; and PR value is lower than 1, which means that the photovoltaic station has the problems of power generation efficiency loss or system failure and the like, and maintenance and optimization are required; by monitoring and analyzing the change of PR values, operation and maintenance personnel can timely master the power generation condition of the photovoltaic station and take corresponding measures to improve the efficiency and the power generation capacity of the photovoltaic system;
the existing technical means generally adopts a sensor and monitoring equipment which are arranged on a photovoltaic module, acquires various data of a photovoltaic station in real time, processes the data by combining weather data and characteristics of the photovoltaic module, and calculates actual generated energy and theoretical generated energy, thereby obtaining PR values; the system can set a reasonable PR range, and when the PR value exceeds a preset range, the system can give an alarm in time so that operation and maintenance personnel can adjust the operation state of the photovoltaic station in time; however, in the practical application process, when the rated efficiency of each photovoltaic module in the photovoltaic field station is different, the PR value is calculated too complex; secondly, only the efficiency of the photovoltaic field station can be confirmed by obtaining the PR value, and the information of the photovoltaic module with abnormality can not be obtained, so that the maintenance accuracy is reduced, and the workload of maintenance personnel can not be reduced;
therefore, how to provide a photovoltaic station PR value monitoring system capable of knowing information of an abnormal photovoltaic module and further reducing workload of maintenance personnel is a problem to be solved in the art.
Disclosure of Invention
In order to solve the problems, the invention provides the following technical scheme:
a photovoltaic field station PR value monitoring system comprising:
the regional division module is used for dividing regions according to basic information of each photovoltaic module in the photovoltaic power plant to generate a plurality of photovoltaic regions;
the ideal power generation acquisition module is connected with the region division module and is used for acquiring meteorological data of the photovoltaic power plant, substituting the meteorological data and component basic information in each photovoltaic region into a preset ideal power generation calculation model, and calculating to obtain ideal power generation data of each photovoltaic region;
the actual power generation acquisition module is connected with the region dividing module and is used for acquiring actual power generation data of each photovoltaic region;
the statistical analysis module is connected with the ideal power generation acquisition module and the actual power generation acquisition module, and is used for calculating and recording PR values of each photovoltaic area according to the detected actual power generation data and the detected ideal power generation data, drawing a trend graph by utilizing the PR values of the day and PR values recorded in the previous preset days, analyzing the efficiency trend of each photovoltaic area and obtaining abnormal area information;
the abnormal component acquisition module is connected with the statistical analysis module and is used for acquiring a photovoltaic region with the daily PR value lower than a preset PR standard, analyzing the basic information of the photovoltaic component with abnormal efficiency and acquiring the abnormal component information;
and the alarm display module is connected with the statistical analysis module and the abnormal component acquisition module and is used for displaying a trend graph and alarming the abnormal region information and the abnormal component information.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the area dividing module includes:
the numbering unit is used for numbering each photovoltaic module in the photovoltaic power plant;
the area statistics unit is used for acquiring the effective area data of each photovoltaic module in the photovoltaic power plant;
the power statistics unit is used for acquiring rated power data of each photovoltaic module in the photovoltaic power plant;
the dividing unit is connected with the numbering unit, the area counting unit and the power counting unit and is used for dividing the obtained rated power data into a plurality of photovoltaic areas according to a preset power range, establishing a database for each photovoltaic area and storing the numbers, the effective area data and the rated power data of the photovoltaic components in the photovoltaic areas in the database.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the ideal power generation acquisition module includes:
the illumination intensity detection unit is arranged in the photovoltaic power plant and is used for detecting average illumination intensity data in one day;
the illumination time detection unit is arranged in the photovoltaic power plant and is used for detecting illumination time data in one day;
the first partition computing unit is connected with the database, the illumination intensity detecting unit and the illumination time detecting unit and is used for acquiring rated power data and effective area data corresponding to each photovoltaic area, substituting the rated power data and the effective area data, the illumination intensity data and the illumination time data into a preset ideal power generation amount computing model, and acquiring ideal power generation amount data W0 of each photovoltaic area.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the preset ideal power generation calculation model is w0=e×t×pn×sn;
wherein Wn0 is ideal power generation amount data of the photovoltaic region n, E is illumination intensity data, T is illumination time data, pn is the maximum value of rated power data of the photovoltaic component in the photovoltaic region n, and Sn is the sum of effective area data of the photovoltaic component in the photovoltaic region n.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the actual power generation acquisition module includes:
the electricity consumption acquisition unit is arranged at the output end of each photovoltaic module in the photovoltaic power plant and is used for detecting actual generated energy data output by each photovoltaic module in one day;
and the partition computing unit II is connected with the database and is used for acquiring actual power generation data of each photovoltaic module, dividing the data according to the serial number information of each photovoltaic module in the database, computing the sum of the power generation of each photovoltaic module in the same photovoltaic area and generating actual power generation data Wt of each photovoltaic area.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the statistical analysis module includes:
the PR value calculation unit is connected with the first partition calculation unit and the second partition calculation unit and is used for substituting the obtained ideal power generation amount data W0 and the actual power generation amount data Wt of each photovoltaic area into a PR value calculation model to obtain PR values of each photovoltaic area; the PR value calculation model is prn=Wnt/Wn 0; wherein PRn represents the PR value of photovoltaic region n;
the history storage unit is connected with the PR value calculation unit and is used for storing PR values obtained through daily calculation and dividing the PR values according to photovoltaic areas corresponding to the PR values;
the drawing unit is connected with the history storage unit and is used for copying PR values of each photovoltaic area on the day and in the preset days before the day from the history storage unit and substituting the PR values into different coordinate axes; drawing trend graphs of all photovoltaic areas by taking dates as an X axis and PR value values as a Y axis;
and the judging unit is connected with the drawing unit and is used for acquiring curve characteristics in the trend graph of each photovoltaic area, comparing the curve characteristics with preset characteristic standards, identifying the photovoltaic area with abnormal trend and generating abnormal area information.
Preferably, in the above-mentioned system for monitoring PR value of a photovoltaic station, the preset number of days is the first 15 days excluding the day.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the abnormal component acquisition module includes:
the standard setting unit is connected with the preset ideal power generation amount calculation model and the PR value calculation unit, and is used for replacing the maximum value Pn of rated power data in the photovoltaic module in the photovoltaic area n with the minimum value Qn of rated power data in the photovoltaic module in the photovoltaic area n, substituting the maximum value Pn into the preset ideal power generation amount calculation model Wn1=ETQn Sn, and obtaining minimum ideal power generation amount data Wn1 through calculation; substituting the PR value standard and actual power generation data Wt into a PR value calculation model, and calculating to obtain PR value standards of each photovoltaic area;
PR value comparison unit, it and said PR value calculation unit and said standard presume the unit and compare PR value of each photovoltaic area with PR value standard correspondence of each photovoltaic area, obtain the information of photovoltaic area lower than PR value standard;
the reverse analysis unit is connected with the PR value comparison unit and the database and is used for acquiring rated power data maximum value Pn of the photovoltaic area information lower than PR value standard, actual power generation amount data Wt of the photovoltaic area, illumination intensity data E and illumination time data T from the database; substituting the data into the preset ideal power generation amount calculation model, and calculating the sum S0 of the actual effective area data of the photovoltaic modules in the photovoltaic area; calculating a difference delta S between the sum Sn of ideal effective area data and the sum S0 of actual effective area data;
the component information determining unit is connected with the reverse analysis unit, determines abnormal area information in the photovoltaic area according to the difference value delta S, determines the number of abnormal photovoltaic components according to the abnormal area information and generates abnormal component information.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the alarm display module includes:
the display unit is connected with the drawing unit and used for displaying trend graphs of the photovoltaic areas;
and the alarm unit is connected with the judging unit and the component information determining unit and is used for sending the abnormal region information and the abnormal component information to the terminal equipment of the maintenance personnel together.
Preferably, in the above-mentioned photovoltaic station PR value monitoring system, the alarm display module further includes:
and the feedback unit is connected with the display unit and the terminal equipment of the maintenance personnel and is used for generating a feedback signal after the personnel confirms that the maintenance is finished through the terminal equipment and sending the feedback signal to the display unit to display the maintenance result.
According to the technical scheme, compared with the prior art, the application has the beneficial effects that:
the invention discloses a PR value monitoring system of a photovoltaic station, which divides photovoltaic areas according to rated power of each component in the photovoltaic station, acquires ideal generating capacity and actual generating capacity data of the photovoltaic areas, performs statistical analysis, calculates and records PR values of each photovoltaic area; drawing a trend graph by utilizing a statistical analysis module according to the historical record of PR values so as to analyze the efficiency trend of the photovoltaic area; identifying a photovoltaic region with abnormal efficiency by comparing with a preset standard of PR values, and further acquiring information of an abnormal photovoltaic module; the abnormal region information and the abnormal component information are displayed in an alarm mode, and the alarm information is sent to terminal equipment of maintenance personnel; the invention can help the photovoltaic station monitor the power generation efficiency in real time, avoid the problem of inaccurate PR value calculation caused by different rated efficiency of the photovoltaic modules, quickly find and process abnormal efficiency, lock the area information of the abnormal modules in each area and improve the operation efficiency and stability of the photovoltaic power generation system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In one embodiment, referring to fig. 1, a system for monitoring PR value of a photovoltaic station includes:
the regional division module is used for dividing regions according to basic information of each photovoltaic module in the photovoltaic power plant to generate a plurality of photovoltaic regions;
the ideal power generation acquisition module is connected with the region division module and is used for acquiring meteorological data of the photovoltaic power plant, substituting the meteorological data and component basic information in each photovoltaic region into a preset ideal power generation calculation model, and calculating to obtain ideal power generation data of each photovoltaic region;
the actual power generation acquisition module is connected with the region dividing module and is used for acquiring actual power generation data of each photovoltaic region;
the statistical analysis module is connected with the ideal power generation acquisition module and the actual power generation acquisition module and is used for calculating and recording PR values of each photovoltaic area according to the detected actual power generation data and the detected ideal power generation data, drawing a trend graph by utilizing the PR value of the day and the PR value recorded in the previous preset days, analyzing the efficiency trend of each photovoltaic area and acquiring abnormal area information;
the abnormal component acquisition module is connected with the statistical analysis module and is used for acquiring a photovoltaic region with the daily PR value lower than a preset PR standard, analyzing the basic information of the photovoltaic component with abnormal efficiency and acquiring the abnormal component information;
and the alarm display module is connected with the statistical analysis module and the abnormal component acquisition module and is used for displaying a trend graph and alarming the abnormal region information and the abnormal component information.
The principle of the above embodiment is: dividing areas based on basic information of a photovoltaic module in a photovoltaic power plant, and acquiring ideal generating capacity data and actual generating capacity data through an ideal generating acquisition module and an actual generating acquisition module; then, a statistical analysis module is used for calculating and recording PR values of each photovoltaic area, and a trend graph is drawn to analyze efficiency trend and detect abnormal areas; the abnormal component acquisition module is used for acquiring a photovoltaic region with PR value lower than a preset standard and analyzing basic information of the abnormal component; the alarm display module is used for displaying the trend graph and sending out alarm information of the abnormal region and the abnormal component.
The beneficial effects of the embodiment are as follows: PR values of all areas of the photovoltaic power plant are monitored and evaluated in real time, so that the photovoltaic modules and areas with abnormal efficiency can be found; analyzing the efficiency trend of the photovoltaic area, and knowing the overall power generation efficiency condition of the photovoltaic power station; detailed information of the abnormal region and the abnormal component is provided, so that maintenance personnel can conveniently process and maintain in time; the trend graph and the alarm information are visually displayed, so that the monitoring and the processing of management personnel and maintenance personnel are facilitated; through drawing trend graphs, operation and maintenance strategies of the photovoltaic power plant can be better optimized, and power generation efficiency and income are improved.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, a region dividing module includes:
the numbering unit is used for numbering each photovoltaic module in the photovoltaic power plant;
the area statistics unit is used for acquiring the effective area data of each photovoltaic module in the photovoltaic power plant;
the power statistics unit is used for acquiring rated power data of each photovoltaic module in the photovoltaic power plant;
the dividing unit is connected with the numbering unit, the area counting unit and the power counting unit and is used for dividing the obtained rated power data into a plurality of photovoltaic areas according to a preset power range, establishing a database for each photovoltaic area and storing the numbers, the effective area data and the rated power data of the photovoltaic modules in the photovoltaic areas in the database.
It should be noted that, in this embodiment, the numbering unit is used to number the photovoltaic modules, so that each photovoltaic module can be conveniently and rapidly identified and managed, and subsequent operations and data recording are facilitated; acquiring effective area data and rated power data of a photovoltaic module, which are necessary for calculating ideal power generation amount and PR value of a photovoltaic area; the dividing unit divides the photovoltaic module according to the preset power range according to the obtained rated power data, so that analysis and comparison of the regional level can be better performed; the dividing unit establishes a database for each photovoltaic area, and stores the serial numbers, the effective area data and the rated power data of the photovoltaic modules in the database, so that the subsequent data management and inquiry are convenient.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, an ideal power generation acquisition module includes:
the illumination intensity detection unit is arranged in the photovoltaic power plant and is used for detecting average illumination intensity data in one day;
the illumination time detection unit is arranged in the photovoltaic power plant and is used for detecting illumination time data in one day;
the first partition computing unit is connected with the database, the illumination intensity detecting unit and the illumination time detecting unit and is used for acquiring rated power data and effective area data corresponding to each photovoltaic area, substituting the rated power data and the effective area data, the illumination intensity data and the illumination time data into a preset ideal power generation amount computing model, and acquiring ideal power generation amount data W0 of each photovoltaic area.
It should be noted that, the preset ideal power generation calculation model is wn0=e×t×pn×sn;
wherein Wn0 is ideal power generation amount data of the photovoltaic region n, E is illumination intensity data, T is illumination time data, pn is the maximum value of rated power data of the photovoltaic components in the photovoltaic region n, and the sum of effective area data of the photovoltaic components in the Sn photovoltaic region n;
according to the embodiment, the ideal power generation acquisition module can calculate the ideal power generation data of each photovoltaic area by acquiring the illumination intensity and illumination time data and combining the rated power and effective area data of the photovoltaic area and utilizing the preset ideal power generation calculation model, basic data are provided for subsequent PR value calculation and efficiency analysis, and the monitoring and evaluation capability of the system on the power generation efficiency of the photovoltaic power plant is improved.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, an actual power generation acquisition module includes:
the electricity consumption acquisition unit is arranged at the output end of each photovoltaic module in the photovoltaic power plant and is used for detecting actual generated energy data output by each photovoltaic module in one day;
the partition computing unit II is connected with the database and used for acquiring actual power generation data of each photovoltaic module, dividing the data according to the serial number information of each photovoltaic module in the database, computing the sum of the power generation of each photovoltaic module in the same photovoltaic area and generating actual power generation data Wt of each photovoltaic area.
The actual power generation acquisition module can acquire the actual power generation data of each photovoltaic region by detecting the actual power generation data of the photovoltaic modules and combining the photovoltaic regions divided in the region dividing module, provides basic data for subsequent PR value calculation, efficiency analysis and anomaly detection, and helps to monitor and evaluate the actual power generation effect of the photovoltaic power plant and the power generation difference between the regions.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, a statistical analysis module includes:
the PR value calculation unit is connected with the first partition calculation unit and the second partition calculation unit and is used for substituting the obtained ideal power generation amount data W0 and the actual power generation amount data Wt of each photovoltaic area into a PR value calculation model to obtain PR values of each photovoltaic area; the PR value calculation model is PRn=Wnt/Wn 0; wherein PRn represents the PR value of photovoltaic region n;
the history storage unit is connected with the PR value calculation unit and is used for storing PR values obtained through daily calculation and dividing the PR values according to photovoltaic areas corresponding to the PR values;
the drawing unit is connected with the history storage unit and is used for copying PR values of each photovoltaic area on the day and in the preset day before the day from the history storage unit and substituting the PR values into different coordinate axes; drawing trend graphs of all photovoltaic areas by taking dates as an X axis and PR value values as a Y axis;
and the judging unit is connected with the drawing unit and is used for acquiring curve characteristics in the trend graph of each photovoltaic area, comparing the curve characteristics with preset characteristic standards, identifying the photovoltaic area with abnormal trend and generating abnormal area information.
The PR value can reflect the power generation efficiency of the photovoltaic power plant and provides an index for comparison analysis; the history storage unit is connected with the PR value calculation unit and is used for storing PR value data obtained through daily calculation and dividing the PR value data according to a photovoltaic area corresponding to the PR value, so that subsequent inquiry and analysis are facilitated; through the trend graph, the change trend of the power generation efficiency of the photovoltaic area can be intuitively observed; the judging unit is connected with the drawing unit, and compares the curve characteristics in the trend graph of the photovoltaic area with preset characteristic standards to identify the photovoltaic area with abnormal trend. By generating the abnormal region information, the photovoltaic region with abnormal efficiency can be conveniently found and processed in time, and the operation and maintenance efficiency of the photovoltaic power plant is improved.
In order to further optimize the above technical solution, please refer to fig. 1, a system for monitoring PR value of a photovoltaic station, wherein the preset day is the first 15 days without the day.
It should be noted that this embodiment can provide longer-time history data in order to more comprehensively analyze and evaluate the change in the power generation efficiency of the photovoltaic region.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, an abnormal component obtaining module includes:
the standard setting unit is connected with the preset ideal power generation amount calculation model and the PR value calculation unit and is used for replacing the maximum value Pn of rated power data in the photovoltaic module in the photovoltaic area n with the minimum value Qn of rated power data in the photovoltaic module in the photovoltaic area n, substituting the maximum value Pn into the preset ideal power generation amount calculation model Wn1=ETQn Sn and obtaining the minimum ideal power generation amount data Wn1 through calculation; substituting the PR value standard and actual power generation data Wt into a PR value calculation model, and calculating to obtain PR value standards of each photovoltaic area;
PR value comparison unit, which compares PR value of each photovoltaic region with PR value standard of each photovoltaic region correspondingly with PR value calculation unit and standard setting unit to obtain photovoltaic region information lower than PR value standard;
the reverse analysis unit is connected with the PR value comparison unit and the database and is used for acquiring rated power data maximum value Pn of the photovoltaic area information lower than the PR value standard, actual power generation amount data Wt of the photovoltaic area, illumination intensity data E and illumination time data T from the database; substituting the data into a preset ideal power generation amount calculation model, and calculating the sum S0 of the actual effective area data of the photovoltaic modules in the photovoltaic area; calculating a difference delta S between the sum Sn of ideal effective area data and the sum S0 of actual effective area data;
the component information determining unit is connected with the reverse analysis unit, determines abnormal area information in the photovoltaic area according to the difference value delta S, determines the number of abnormal photovoltaic components according to the abnormal area information and generates abnormal component information.
It should be noted that, the minimum value is selected by the reference standard, and the maximum value is selected by PR calculation, which is helpful for establishing an operation system more in line with the actual situation in the power plant; the actual effective area is calculated through reverse analysis, so that the number or degree of abnormality of abnormal components in the area can be preliminarily judged; the method provides beneficial support for flexible and timely maintenance and repair, and improves the power generation performance and long-term operation benefit of the photovoltaic power plant.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, an alarm display module includes:
the display unit is connected with the drawing unit and used for displaying trend graphs of the photovoltaic areas;
and the alarm unit is connected with the judging unit and the component information determining unit and is used for corresponding the abnormal region information and the abnormal component information and transmitting the abnormal region information and the abnormal component information to the terminal equipment of the maintenance personnel.
The method has the advantages that real-time data display and abnormal information alarm notification are realized, maintenance personnel can quickly know the condition of the photovoltaic area, corresponding measures are timely taken, and the efficient and stable operation of the photovoltaic power plant is ensured.
In order to further optimize the above technical solution, referring to fig. 1, a system for monitoring PR value of a photovoltaic station, the alarm display module further includes:
and the feedback unit is connected with the display unit and the terminal equipment of the maintenance personnel and is used for generating a feedback signal after the personnel confirms that the maintenance is finished through the terminal equipment and sending the feedback signal to the display unit to display the maintenance result.
It should be noted that, the feedback unit allows maintenance personnel to confirm the maintenance result through the terminal equipment, reduces communication links and time, and can quickly feed back maintenance completion, thereby improving maintenance efficiency.
It should be noted that, in the system provided in the foregoing embodiment, only the division of the foregoing functional modules is illustrated, in practical application, the foregoing functional allocation may be performed by different functional modules, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps related to the embodiments of the present invention are merely for distinguishing the respective modules or steps, and are not to be construed as unduly limiting the present invention.
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/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/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the appended claims and their equivalents, the present invention is intended to include such modifications and variations as would be included in the above description of the disclosed embodiments, enabling those 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.

Claims (10)

1. A photovoltaic field station PR value monitoring system, comprising:
the regional division module is used for dividing regions according to basic information of each photovoltaic module in the photovoltaic power plant to generate a plurality of photovoltaic regions;
the ideal power generation acquisition module is connected with the region division module and is used for acquiring meteorological data of the photovoltaic power plant, substituting the meteorological data and component basic information in each photovoltaic region into a preset ideal power generation calculation model, and calculating to obtain ideal power generation data of each photovoltaic region;
the actual power generation acquisition module is connected with the region dividing module and is used for acquiring actual power generation data of each photovoltaic region;
the statistical analysis module is connected with the ideal power generation acquisition module and the actual power generation acquisition module, and is used for calculating and recording PR values of each photovoltaic area according to the detected actual power generation data and the detected ideal power generation data, drawing a trend graph by utilizing the PR values of the day and PR values recorded in the previous preset days, analyzing the efficiency trend of each photovoltaic area and obtaining abnormal area information;
the abnormal component acquisition module is connected with the statistical analysis module and is used for acquiring a photovoltaic region with the daily PR value lower than a preset PR standard, analyzing the basic information of the photovoltaic component with abnormal efficiency and acquiring the abnormal component information;
and the alarm display module is connected with the statistical analysis module and the abnormal component acquisition module and is used for displaying a trend graph and alarming the abnormal region information and the abnormal component information.
2. The system for monitoring PR value of a photovoltaic field station according to claim 1, wherein said area dividing module comprises:
the numbering unit is used for numbering each photovoltaic module in the photovoltaic power plant;
the area statistics unit is used for acquiring the effective area data of each photovoltaic module in the photovoltaic power plant;
the power statistics unit is used for acquiring rated power data of each photovoltaic module in the photovoltaic power plant;
the dividing unit is connected with the numbering unit, the area counting unit and the power counting unit and is used for dividing the obtained rated power data into a plurality of photovoltaic areas according to a preset power range, establishing a database for each photovoltaic area and storing the numbers, the effective area data and the rated power data of the photovoltaic components in the photovoltaic areas in the database.
3. The system for monitoring PR value of a photovoltaic field station according to claim 2, wherein said ideal power generation acquisition module comprises:
the illumination intensity detection unit is arranged in the photovoltaic power plant and is used for detecting average illumination intensity data in one day;
the illumination time detection unit is arranged in the photovoltaic power plant and is used for detecting illumination time data in one day;
the first partition computing unit is connected with the database, the illumination intensity detecting unit and the illumination time detecting unit and is used for acquiring rated power data and effective area data corresponding to each photovoltaic area, substituting the rated power data and the effective area data, the illumination intensity data and the illumination time data into a preset ideal power generation amount computing model, and acquiring ideal power generation amount data W0 of each photovoltaic area.
4. A system for monitoring PR value of a photovoltaic station according to claim 3, characterized in that said preset ideal power generation calculation model is wn0=e×t×pn×sn;
wherein Wn0 is ideal power generation amount data of the photovoltaic region n, E is illumination intensity data, T is illumination time data, pn is the maximum value of rated power data of the photovoltaic component in the photovoltaic region n, and Sn is the sum of effective area data of the photovoltaic component in the photovoltaic region n.
5. The system for monitoring PR value of a photovoltaic field station as set forth in claim 4, wherein said actual power generation acquisition module comprises:
the electricity consumption acquisition unit is arranged at the output end of each photovoltaic module in the photovoltaic power plant and is used for detecting actual generated energy data output by each photovoltaic module in one day;
and the partition computing unit II is connected with the database and is used for acquiring actual power generation data of each photovoltaic module, dividing the data according to the serial number information of each photovoltaic module in the database, computing the sum of the power generation of each photovoltaic module in the same photovoltaic area and generating actual power generation data Wt of each photovoltaic area.
6. The system for monitoring PR value of a photovoltaic field station as set forth in claim 5, wherein said statistical analysis module comprises:
the PR value calculation unit is connected with the first partition calculation unit and the second partition calculation unit and is used for substituting the obtained ideal power generation amount data W0 and the actual power generation amount data Wt of each photovoltaic area into a PR value calculation model to obtain PR values of each photovoltaic area; the PR value calculation model is prn=Wnt/Wn 0; wherein PRn represents the PR value of photovoltaic region n;
the history storage unit is connected with the PR value calculation unit and is used for storing PR values obtained through daily calculation and dividing the PR values according to photovoltaic areas corresponding to the PR values;
the drawing unit is connected with the history storage unit and is used for copying PR values of each photovoltaic area on the day and in the preset days before the day from the history storage unit and substituting the PR values into different coordinate axes; drawing trend graphs of all photovoltaic areas by taking dates as an X axis and PR value values as a Y axis;
and the judging unit is connected with the drawing unit and is used for acquiring curve characteristics in the trend graph of each photovoltaic area, comparing the curve characteristics with preset characteristic standards, identifying the photovoltaic area with abnormal trend and generating abnormal area information.
7. The system of claim 6, wherein the predetermined number of days is the first 15 days excluding the day.
8. The system for monitoring PR value of a photovoltaic field station as set forth in claim 7, wherein said anomalous component acquisition module comprises:
the standard setting unit is connected with the preset ideal power generation amount calculation model and the PR value calculation unit, and is used for replacing the maximum value Pn of rated power data in the photovoltaic module in the photovoltaic area n with the minimum value Qn of rated power data in the photovoltaic module in the photovoltaic area n, substituting the maximum value Pn into the preset ideal power generation amount calculation model Wn1=ETQn Sn, and obtaining minimum ideal power generation amount data Wn1 through calculation; substituting the PR value standard and actual power generation data Wt into a PR value calculation model, and calculating to obtain PR value standards of each photovoltaic area;
PR value comparison unit, it and said PR value calculation unit and said standard presume the unit and compare PR value of each photovoltaic area with PR value standard correspondence of each photovoltaic area, obtain the information of photovoltaic area lower than PR value standard;
the reverse analysis unit is connected with the PR value comparison unit and the database and is used for acquiring rated power data maximum value Pn of the photovoltaic area information lower than PR value standard, actual power generation amount data Wt of the photovoltaic area, illumination intensity data E and illumination time data T from the database; substituting the data into the preset ideal power generation amount calculation model, and calculating the sum S0 of the actual effective area data of the photovoltaic modules in the photovoltaic area; calculating a difference delta S between the sum Sn of ideal effective area data and the sum S0 of actual effective area data;
the component information determining unit is connected with the reverse analysis unit, determines abnormal area information in the photovoltaic area according to the difference value delta S, determines the number of abnormal photovoltaic components according to the abnormal area information and generates abnormal component information.
9. The system for monitoring PR value of a photovoltaic field station as set forth in claim 8, wherein said alarm display module comprises:
the display unit is connected with the drawing unit and used for displaying trend graphs of the photovoltaic areas;
and the alarm unit is connected with the judging unit and the component information determining unit and is used for sending the abnormal region information and the abnormal component information to the terminal equipment of the maintenance personnel together.
10. The system for monitoring PR value of a photovoltaic field station as set forth in claim 9, wherein said alarm display module further comprises:
and the feedback unit is connected with the display unit and the terminal equipment of the maintenance personnel and is used for generating a feedback signal after the personnel confirms that the maintenance is finished through the terminal equipment and sending the feedback signal to the display unit to display the maintenance result.
CN202311132084.XA 2023-09-04 2023-09-04 PR value monitoring system for photovoltaic station Pending CN117439540A (en)

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Application Number Priority Date Filing Date Title
CN202311132084.XA CN117439540A (en) 2023-09-04 2023-09-04 PR value monitoring system for photovoltaic station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311132084.XA CN117439540A (en) 2023-09-04 2023-09-04 PR value monitoring system for photovoltaic station

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Publication Number Publication Date
CN117439540A true CN117439540A (en) 2024-01-23

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