A photovoltaic power station PR value monitoring system

Abstract

The application discloses a kind of photovoltaic station PR value monitoring systems, according to the rated power of each component in photovoltaic station and divide photovoltaic area, obtain the ideal power generation of photovoltaic area and actual power generation data, and carry out statistical analysis, calculate and record the PR value of each photovoltaic area;Utilize statistical analysis module according to the historical record of PR value draw trend curve chart, so as to analyze the efficiency trend of photovoltaic area;By comparing the preset standard of PR value, identify the photovoltaic area of efficiency anomaly, and further obtain the information of abnormal photovoltaic component;Abnormal area information and abnormal component information are alarmed and displayed, and alarm information is sent to the terminal equipment of maintenance personnel;The application can help photovoltaic station real-time monitoring power generation efficiency, avoid the problem that PR value is not accurately calculated due to different rated efficiency of photovoltaic component, quickly find and handle efficiency anomaly, lock the area information of abnormal component in each area, improve the operation efficiency and stability of photovoltaic power generation system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation, more particularly to a photovoltaic power station PR value monitoring system. BACKGROUND

[0002] The PR value is an important indicator of measuring the efficiency of photovoltaic power generation; it represents the ratio of actual power generation to the theoretical power generation of photovoltaic modules; the theoretical power generation is the expected power generation calculated according to the parameters such as light intensity, rated power of photovoltaic modules and effective area of photovoltaic modules; the closer the PR value is to 1, the closer the actual power generation of the photovoltaic power station is to the theoretical power generation, i.e. the photovoltaic system has good performance; and if the PR value is less than 1, it indicates that there is a problem such as power generation efficiency loss or system failure in the photovoltaic power station, which needs to be maintained and optimized; by monitoring and analyzing the changes of the PR value, the operation and maintenance personnel can timely master the power generation situation of the photovoltaic power station and take corresponding measures to improve the efficiency and power generation of the photovoltaic system;

[0003] The existing technical means usually adopts sensors and monitoring devices installed on photovoltaic modules to collect various data of the photovoltaic power station in real time, processes in combination with weather data and characteristics of photovoltaic modules, calculates the actual power generation and the theoretical power generation, and thus obtains the PR value; the system can set a reasonable PR range, and when the PR value exceeds the preset range, the system will promptly issue an alarm so that the operation and maintenance personnel can timely adjust the operation state of the photovoltaic power station; but in actual application process, the rated efficiency of each photovoltaic module in the photovoltaic power station is different, and the calculation of the PR value is too complex; secondly, only the efficiency of the photovoltaic power station can be confirmed by obtaining the PR value, and the information of the abnormal photovoltaic module cannot be obtained, which reduces the accuracy of maintenance and thus cannot reduce the workload of maintenance personnel;

[0004] Therefore, how to provide a photovoltaic power station PR value monitoring system capable of obtaining the information of abnormal photovoltaic modules and thus reducing the workload of maintenance personnel becomes a problem to be solved in the field. SUMMARY

[0005] To solve the above problems, the present application provides the following technical scheme:

[0006] A photovoltaic power station PR value monitoring system, comprising:

[0007] A region division module, which divides regions according to the basic information of each photovoltaic module in the photovoltaic power plant, and generates a plurality of photovoltaic regions;

[0008] An ideal power generation acquisition module, which is connected with the region division module, is used to acquire meteorological data of the photovoltaic power plant, substitutes the data into a preset ideal power generation calculation model together with the basic information of the modules in each photovoltaic region, and acquires ideal power generation data of each photovoltaic region through calculation;

[0009] an actual power generation acquisition module, connected with the area division module, for acquiring actual power generation data of each photovoltaic area;

[0010] a statistical analysis module, connected with the ideal power generation acquisition module and the actual power generation acquisition module, for calculating and recording PR values of each photovoltaic area according to the detected actual power generation data and ideal power generation data, drawing a trend curve graph by using the PR values of the day and the PR values recorded in the previous preset days, analyzing the efficiency trend of each photovoltaic area, and acquiring abnormal area information;

[0011] an abnormal component acquisition module, connected with the statistical analysis module, for acquiring photovoltaic areas with PR values lower than a preset PR standard on the day, analyzing basic information of photovoltaic components with abnormal efficiency, and acquiring the abnormal component information;

[0012] an alarm display module, connected with the statistical analysis module and the abnormal component acquisition module, for displaying the trend curve graph and alarming the abnormal area information and the abnormal component information.

[0013] Preferably, in the above photovoltaic power station PR value monitoring system, the area division module comprises:

[0014] a numbering unit for numbering each photovoltaic component in the photovoltaic power plant;

[0015] an area statistical unit for acquiring effective area data of each photovoltaic component in the photovoltaic power plant;

[0016] a power statistical unit for acquiring rated power data of each photovoltaic component in the photovoltaic power plant;

[0017] a division unit, connected with the numbering unit, the area statistical unit and the power statistical unit, for dividing each acquired rated power data into a plurality of photovoltaic areas according to a preset power range, and establishing a database for each photovoltaic area, and storing the numbering, effective area data and rated power data of photovoltaic components in the photovoltaic area in the database.

[0018] Preferably, in the above photovoltaic power station PR value monitoring system, the ideal power generation acquisition module comprises:

[0019] a light intensity detection unit arranged in the photovoltaic power plant for detecting average light intensity data in a day;

[0020] a light time detection unit arranged in the photovoltaic power plant for detecting light time data in a day;

[0021] A partition calculation unit, connected with the database, the illumination intensity detection unit and the illumination time detection unit, is configured to obtain the rated power data and the effective area data corresponding to each photovoltaic area, and substitute the data into a preset ideal power generation calculation model to obtain ideal power generation data W0 of each photovoltaic area.

[0022] Preferably, in the photovoltaic power station PR value monitoring system, the preset ideal power generation calculation model is Wn0=E*T*Pn*Sn.

[0023] wherein Wn0 is the ideal power generation data of the photovoltaic area n, E is the illumination intensity data, T is the illumination time data, Pn is the maximum value of the rated power data in the photovoltaic components in the photovoltaic area n, and Sn is the sum of the effective area data of the photovoltaic components in the photovoltaic area n.

[0024] Preferably, in the photovoltaic power station PR value monitoring system, the actual power generation obtaining module comprises:

[0025] A power consumption obtaining unit is arranged at the output end of each photovoltaic component in the photovoltaic power plant, and is configured to detect actual power generation data of each photovoltaic component in a day.

[0026] A second partition calculation unit is connected with the database, and is configured to obtain the actual power generation data of each photovoltaic component, divide the data according to the number information of each photovoltaic component in the database, calculate the sum of the power generation of each photovoltaic component in the same photovoltaic area, and generate actual power generation data Wt of each photovoltaic area.

[0027] Preferably, in the photovoltaic power station PR value monitoring system, the statistical analysis module comprises:

[0028] A PR value calculation unit is connected with the first partition calculation unit and the second partition calculation unit, and is configured to substitute the obtained ideal power generation data W0 and actual power generation data Wt of each photovoltaic area into a PR value calculation model to obtain the PR value of each photovoltaic area; the PR value calculation model is PRn=Wnt / Wn0; wherein PRn represents the PR value of the photovoltaic area n.

[0029] A history storage unit is connected with the PR value calculation unit, and is configured to store the PR value obtained by daily calculation, and divide the PR value according to the corresponding photovoltaic area.

[0030] A drawing unit is connected with the history storage unit, and is configured to copy the PR value of each photovoltaic area in the day and a preset number of days before the day from the history storage unit, substitute the PR value into different coordinate axes, and draw a trend curve graph of each photovoltaic area with the date as the X axis and the PR value as the Y axis.

[0031] a determination unit, connected with the drawing unit, for obtaining the curve feature in the trend curve graph of each photovoltaic region, comparing it with the preset feature standard, identifying the photovoltaic region with abnormal trend, and generating abnormal region information.

[0032] Preferably, in the photovoltaic power station PR value monitoring system, the preset days are the previous 15 days excluding the day.

[0033] Preferably, in the photovoltaic power station PR value monitoring system, the abnormal component acquisition module comprises:

[0034] a standard setting unit, connected with the preset ideal power generation calculation model and the PR value calculation unit, for replacing the maximum value Pn of the rated power data of the photovoltaic components in the photovoltaic region n with the minimum value Qn of the rated power data of the photovoltaic components in the photovoltaic region n, substituting them into the preset ideal power generation calculation model Wn1=E*T*Qn*Sn, and obtaining the minimum ideal power generation data Wn1 through calculation; and substituting them into the PR value calculation model with the actual power generation data Wt, and obtaining the PR value standard of each photovoltaic region through calculation;

[0035] a PR value comparison unit, connected with the PR value calculation unit and the standard setting unit, for comparing the PR value of each photovoltaic region with the PR value standard of each photovoltaic region, and obtaining the photovoltaic region information lower than the PR value standard;

[0036] a reverse analysis unit, connected with the PR value comparison unit and the database, for obtaining the maximum value Pn of the rated power data of the photovoltaic region information lower than the PR value standard, the actual power generation data Wt of the photovoltaic region, the light intensity data E and the light time data T from the database; substituting them into the preset ideal power generation calculation model, calculating the sum S0 of the actual effective area data of the photovoltaic components in the photovoltaic region; and calculating the difference δS between the sum Sn of the ideal effective area data and the sum S0 of the actual effective area data.

[0037] a component information determination unit, connected with the reverse analysis unit, for determining the abnormal area information in the photovoltaic region according to the difference δS, determining the number of abnormal photovoltaic components according to the abnormal area information, and generating abnormal component information.

[0038] Preferably, in the photovoltaic power station PR value monitoring system, the alarm display module comprises:

[0039] a display unit, connected with the drawing unit, for displaying the trend curve graph of each photovoltaic region;

[0040] An alarm unit is connected with the determination unit and the component information determination unit, used for corresponding the abnormal area information and the abnormal component information, and sending to the terminal device of the maintenance personnel.

[0041] Preferably, in the photovoltaic station PR value monitoring system, the alarm display module further comprises:

[0042] A feedback unit is connected with the display unit and the terminal device of the maintenance personnel, used for generating a feedback signal after the maintenance personnel confirms the end of maintenance through the terminal device, and sending the feedback signal to the display unit to display the maintenance result.

[0043] Compared with the prior art, the technical scheme has the beneficial effects that:

[0044] The application discloses a photovoltaic station PR value monitoring system, which divides photovoltaic areas according to rated powers of components in the photovoltaic station, obtains ideal power generation and actual power generation data of the photovoltaic areas, and performs statistical analysis, calculates and records PR values of the photovoltaic areas; a statistical analysis module is used to draw a trend curve according to historical records of the PR values, so that the efficiency trend of the photovoltaic areas can be analyzed; by comparing preset standards of the PR values, the photovoltaic areas with abnormal efficiency can be identified, and information of abnormal photovoltaic components can be further obtained; abnormal area information and abnormal component information are displayed and an alarm is given, and the alarm information is sent to a terminal device of maintenance personnel; the application can help the photovoltaic station to monitor power generation efficiency in real time, avoid the problem that PR values are inaccurate due to different rated efficiencies of photovoltaic components, quickly find and handle abnormal efficiency, lock area information of abnormal components in each area, and improve operation efficiency and stability of the photovoltaic power generation system. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0046] Figure 1 It is a system flowchart of the application. DETAILED DESCRIPTION

[0047] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described in the description of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application. With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described in the description of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0048] In the present application, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the present application.

[0050] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] In one embodiment, please refer to Figure 1 A photovoltaic station PR value monitoring system, comprising:

[0052] A region division module divides the regions according to the basic information of each photovoltaic component in the photovoltaic power plant, and generates a plurality of photovoltaic regions;

[0053] an ideal power generation obtaining module connected with the region division module, configured to obtain meteorological data of the photovoltaic power plant, and substitute the meteorological data and component basic information in each photovoltaic region into a preset ideal power generation calculation model to obtain ideal power generation data of each photovoltaic region through calculation;

[0054] an actual power generation obtaining module connected with the region division module, configured to obtain actual power generation data of each photovoltaic region;

[0055] a statistical analysis module connected with the ideal power generation obtaining module and the actual power generation obtaining module, configured to calculate and record PR values of each photovoltaic region according to the detected actual power generation data and ideal power generation data, draw a trend curve graph using the PR values of the day and the PR values recorded in the previous preset number of days, analyze efficiency trends of each photovoltaic region, and obtain abnormal region information;

[0056] an abnormal component obtaining module connected with the statistical analysis module, configured to obtain photovoltaic regions with PR values lower than a preset PR standard, analyze photovoltaic component basic information with abnormal efficiency, and obtain the abnormal component information;

[0057] an alarm display module connected with the statistical analysis module and the abnormal component obtaining module, configured to display the trend curve graph and alarm the abnormal region information and the abnormal component information.

[0058] The principle of the above embodiment is that: the photovoltaic regions are divided based on the basic information of photovoltaic components in the photovoltaic power plant, and ideal power generation data and actual power generation data are obtained through the ideal power generation obtaining module and the actual power generation obtaining module; then the statistical analysis module is used to calculate and record PR values of each photovoltaic region, and a trend curve graph is drawn to analyze efficiency trends and detect abnormal regions; the abnormal component obtaining module is used to obtain photovoltaic regions with PR values lower than a preset standard, and analyze the basic information of abnormal components; and the alarm display module is used to display the trend curve graph and issue alarm information of abnormal regions and abnormal components.

[0059] The beneficial effects of the above embodiment are: real-time monitoring and evaluation of PR values of each region of the photovoltaic power plant, helping to find photovoltaic components and regions with abnormal efficiency; analysis of efficiency trends of photovoltaic regions to understand the overall power generation efficiency of the photovoltaic power station; provision of detailed information of abnormal regions and abnormal components for timely processing and maintenance by maintenance personnel; visual display of trend curve graphs and alarm information for monitoring and processing by management personnel and maintenance personnel; through drawing of trend curve graphs, the operation and maintenance strategy of the photovoltaic power plant can be better optimized, and the power generation efficiency and income can be improved.

[0060] In order to further optimize the above technical solution, please refer to Figure 1 A photovoltaic station PR value monitoring system, the region division module comprises:

[0061] a numbering unit configured to number each photovoltaic module in the photovoltaic power plant;

[0062] an area statistics unit configured to obtain effective area data of each photovoltaic module in the photovoltaic power plant;

[0063] a power statistics unit configured to obtain rated power data of each photovoltaic module in the photovoltaic power plant;

[0064] a division unit connected with the numbering unit, the area statistics unit and the power statistics unit, configured to divide each rated power data obtained into a plurality of photovoltaic regions according to a preset power range, and establish a database for each photovoltaic region, and store the number, effective area data and rated power data of the photovoltaic module in the photovoltaic region in the database.

[0065] It should be noted that the photovoltaic module is numbered by the numbering unit, which can facilitate quick identification and management of each photovoltaic module, and facilitate subsequent operation and data recording; the effective area data and rated power data of the photovoltaic module are obtained, which is necessary for calculating the ideal power generation and PR value of the photovoltaic region; the division unit divides the photovoltaic module according to the preset power range according to the rated power data obtained, which can better analyze and compare the region level; the division unit establishes a database for each photovoltaic region, and stores the number, effective area data and rated power data of the photovoltaic module in the database, which facilitates subsequent data management and query.

[0066] In order to further optimize the above technical solutions, please refer to Figure 1 A photovoltaic station PR value monitoring system, the ideal power generation obtaining module comprises:

[0067] a light intensity detection unit arranged in the photovoltaic power plant and configured to detect average light intensity data in a day;

[0068] a light time detection unit arranged in the photovoltaic power plant and configured to detect light time data in a day;

[0069] a first partition calculation unit connected with the database, the light intensity detection unit and the light time detection unit, configured to obtain rated power data and effective area data corresponding to each photovoltaic region, and substitute the rated power data and effective area data into a preset ideal power generation calculation model together with light intensity data and light time data to obtain ideal power generation data W0 of each photovoltaic region.

[0070] It should be noted that the preset ideal power generation calculation model is Wn0=E*T*Pn*Sn.

[0071] Wherein, Wn0 is the ideal power generation data of photovoltaic area n, E is the light intensity data, T is the light time data, Pn is the maximum value of the rated power data of the photovoltaic components in the photovoltaic area n, and Sn is the sum of the effective area data of the photovoltaic components in the photovoltaic area n;

[0072] The ideal power generation acquisition module in the embodiment can calculate the ideal power generation data of each photovoltaic area by acquiring the light intensity and light time data, combining the rated power and effective area data of the photovoltaic area, and using a preset ideal power generation calculation model, thereby providing basic data for subsequent PR value calculation and efficiency analysis, and improving the monitoring and evaluation capability of the system for the power generation efficiency of the photovoltaic power plant.

[0073] For further optimization of the above technical solutions, please refer to Figure 1 A photovoltaic station PR value monitoring system, the actual power generation acquisition module comprises:

[0074] The power consumption acquisition unit is arranged on the output end of each photovoltaic component in the photovoltaic power plant, and is used to detect the actual power generation data of each photovoltaic component output in a day.

[0075] The subarea calculation unit two is connected with the database, is used to acquire the actual power generation data of each photovoltaic component, divides the actual power generation data according to the number information of each photovoltaic component in the database, calculates the sum of the power generation of each photovoltaic component in the same photovoltaic area, and generates the actual power generation data Wt of each photovoltaic area.

[0076] It should be noted that the actual power generation acquisition module can acquire the actual power generation data of each photovoltaic area by detecting the actual power generation data of the photovoltaic components and combining the photovoltaic areas divided in the area division module, thereby providing basic data for subsequent PR value calculation, efficiency analysis and abnormality detection, and helping to monitor and evaluate the actual power generation effect of the photovoltaic power plant and the power generation difference between the areas.

[0077] For further optimization of the above technical solutions, please refer to Figure 1 A photovoltaic station PR value monitoring system, the statistical analysis module comprises:

[0078] The PR value calculation unit is connected with the subarea calculation unit one and the subarea calculation unit two, is used to substitute the ideal power generation data W0 and the actual power generation data Wt of each photovoltaic area into a PR value calculation model, and obtains the PR value of each photovoltaic area; the PR value calculation model is PRn = Wnt / Wn0; wherein PRn represents the PR value of the photovoltaic area n.

[0079] The historical storage unit is connected with the PR value calculation unit, is used to store the PR value obtained by daily calculation, and divides the PR value according to the photovoltaic area corresponding to the PR value.

[0080] a drawing unit connected with the history storage unit, configured to copy the PR value of each photovoltaic area in the day and a preset number of days before the day from the history storage unit, and substitute it into different coordinate axes; draw a trend curve of each photovoltaic area with the date as the X axis and the PR value as the Y axis;

[0081] a determination unit connected with the drawing unit, configured to obtain the curve characteristics in the trend curve of each photovoltaic area, compare it with a preset characteristic standard, identify the photovoltaic area with abnormal trend, and generate abnormal area information.

[0082] It should be noted that the PR value can reflect the power generation efficiency of the photovoltaic power plant, and provide an index for comparative analysis; the history storage unit is connected with the PR value calculation unit, configured to store the PR value data calculated every day, and divide it according to the photovoltaic area corresponding to the PR value, so as to facilitate subsequent query and analysis; through the trend curve, the change trend of the power generation efficiency of the photovoltaic area can be directly observed; the determination unit is connected with the drawing unit, and the curve characteristics in the trend curve of the photovoltaic area are compared with the preset characteristic standard to identify the photovoltaic area with abnormal trend. By generating abnormal area information, the photovoltaic area with abnormal efficiency can be found and processed in time, and the operation and maintenance efficiency of the photovoltaic power plant is improved.

[0083] For further optimization of the above technical solution, please refer to Figure 1 A photovoltaic station PR value monitoring system, and the preset number of days is 15 days not including the day.

[0084] It should be noted that the embodiment can provide longer historical data to more comprehensively analyze and evaluate the change of the power generation efficiency of the photovoltaic area.

[0085] For further optimization of the above technical solution, please refer to Figure 1 A photovoltaic station PR value monitoring system, the abnormal component acquisition module comprises:

[0086] a standard setting unit connected with the preset ideal power generation calculation model and the PR value calculation unit, configured to replace the maximum value Pn of the rated power data of the photovoltaic components in the photovoltaic area n with the minimum value Qn of the rated power data of the photovoltaic components in the photovoltaic area n, substitute it into the preset ideal power generation calculation model Wn1=E*T*Qn*Sn, and obtain the minimum ideal power generation data Wn1 through calculation; and substitute it and the actual power generation data Wt into the PR value calculation model to obtain the PR value standard of each photovoltaic area through calculation;

[0087] a PR value comparison unit connected with the PR value calculation unit and the standard setting unit, configured to compare the PR value of each photovoltaic area with the PR value standard of each photovoltaic area, and obtain the photovoltaic area information lower than the PR value standard.

[0088] The reverse analysis unit is connected with the PR value comparison unit and the database, and is used to obtain the maximum power data Pn of the photovoltaic area information below the PR value standard, the actual power generation data Wt of the photovoltaic area, the light intensity data E and the light time data T from the database; the data is substituted into the preset ideal power generation calculation model to calculate the sum S0 of the actual effective area data of the photovoltaic components in the photovoltaic area; and the difference δS between the sum Sn of the ideal effective area data and the sum S0 of the actual effective area data is calculated.

[0089] The component information determination unit is connected with the reverse analysis unit, determines the abnormal area information in the photovoltaic area according to the difference δS, determines the number of abnormal photovoltaic components according to the abnormal area information, and generates abnormal component information.

[0090] It should be noted that the reference standard selects the minimum value, and the PR calculation selects the maximum value, which helps to establish an operation system that is more in line with the actual situation in the power plant; the actual effective area is calculated through reverse analysis, which can preliminarily determine the number or abnormality of abnormal components in the area; and beneficial support is provided for flexible and timely maintenance and repair, and the power generation performance and long-term operation benefit of the photovoltaic power plant are improved.

[0091] For further optimization of the above technical solutions, please refer to Figure 1 A PR value monitoring system of a photovoltaic station, the alarm display module comprises:

[0092] The display unit is connected with the drawing unit, and is used to display the trend curve graph of each photovoltaic area.

[0093] The alarm unit is connected with the determination unit and the component information determination unit, and is used to correspond the abnormal area information and the abnormal component information, and send them to the terminal device of the maintenance personnel together.

[0094] It should be noted that the real-time data display and abnormal information alarm notification are realized, so that the maintenance personnel can quickly understand the situation of the photovoltaic area and take corresponding measures in time, and the efficient and stable operation of the photovoltaic power plant is ensured.

[0095] For further optimization of the above technical solutions, please refer to Figure 1 A PR value monitoring system of a photovoltaic station, the alarm display module further comprises:

[0096] The feedback unit is connected with the display unit and the terminal device of the maintenance personnel, and is used to generate a feedback signal after the personnel confirms the end of maintenance through the terminal device, and send the feedback signal to the display unit to display the maintenance result.

[0097] It should be noted that the feedback unit allows the maintenance personnel to confirm the maintenance result through the terminal device, reduces the communication link and time, can quickly feedback the maintenance completion, and thus improves the maintenance efficiency.

[0098] It should be noted that the system provided by the above embodiments is only exemplified by the division of the above functional modules. In actual application, the above functions can be completed by different functional modules according to needs, that is, the modules or steps in the embodiments of the present application are further decomposed or combined, for example, the modules of the above embodiments can be combined into one module, or can be further split into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present application are only for distinguishing the respective modules and steps, and should not be considered as an improper limitation of the present application.

[0099] The term "comprising" or any other similar word is intended to encompass a non-exclusive inclusion, so that a process, method, article, or equipment / device including a series of elements includes not only those elements, but also other elements not explicitly listed, or inherent elements of the process, method, article, or equipment / device.

[0100] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

[0101] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations. The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic power station PR value monitoring system, characterized in that, include: The area division module divides the photovoltaic power plant into several photovoltaic areas based on the rated power of each photovoltaic module. The ideal power generation acquisition module is connected to the area division module and is used to acquire meteorological data of photovoltaic power plants, and substitute it and the basic information of components in each photovoltaic area into the preset ideal power generation calculation model to obtain the ideal power generation data of each photovoltaic area. The actual power generation acquisition module is connected to the area division module and is used to acquire the actual power generation data of each photovoltaic area; The statistical analysis module, which is connected to the ideal power generation acquisition module and the actual power generation acquisition module, is used to calculate and record the PR value of each photovoltaic area based on the detected actual power generation data and ideal power generation data, draw a trend curve using the PR value of the day and the PR values ​​recorded in the previous preset number of days, analyze the efficiency trend of each photovoltaic area, and obtain information on abnormal areas. An abnormal component acquisition module, which is connected to the statistical analysis module, is used to acquire photovoltaic areas where the PR value of the day is lower than the preset PR standard, analyze the basic information of photovoltaic modules with abnormal efficiency, and acquire information of the abnormal component. An alarm display module, which is connected to the statistical analysis module and the abnormal component acquisition module, is used to display trend curves and to issue alarms for abnormal area information and abnormal component information.

2. The photovoltaic power station PR value monitoring system according to claim 1, characterized in that, The region division module includes: Numbering unit, which is used to number each photovoltaic module in a photovoltaic power plant; The area statistics unit is used to obtain the effective area data of each photovoltaic module in the photovoltaic power plant. The power statistics unit is used to acquire the rated power data of each photovoltaic module in the photovoltaic power plant; The division unit, which is connected to the numbering unit, the area statistics unit and the power statistics unit, is used to divide the acquired rated power data into several photovoltaic areas according to a preset power range, and to establish a database for each photovoltaic area, storing the number of photovoltaic modules, effective area data and rated power data in the photovoltaic area in the database.

3. The photovoltaic power station PR value monitoring system according to claim 2, characterized in that, The ideal power generation acquisition module includes: The irradiance detection unit is installed inside the photovoltaic power plant to detect the average irradiance data over a day; The sunshine duration detection unit is installed inside the photovoltaic power plant to detect sunshine duration data throughout the day; The first partition calculation unit is connected to the database, the light intensity detection unit, and the light duration detection unit. It is used to obtain the rated power data and effective area data corresponding to each photovoltaic area, and substitute them, along with the light intensity data and light duration data, into a preset ideal power generation calculation model to obtain the ideal power generation data W0 for each photovoltaic area.

4. The photovoltaic power station PR value monitoring system according to claim 3, characterized in that, The preset ideal power generation calculation model is Wn0=E*T*Pn*Sn; Where Wn0 is the ideal power generation data of photovoltaic region n, E is the irradiance data, T is the irradiance time data, Pn is the maximum value of the rated power data of photovoltaic modules in photovoltaic region n, and Sn is the sum of the effective area data of photovoltaic modules in photovoltaic region n.

5. A photovoltaic power station PR value monitoring system according to claim 4, characterized in that, The actual power generation acquisition module includes: The power consumption acquisition unit is installed on the output end of each photovoltaic module in the photovoltaic power plant to detect the actual power generation data of each photovoltaic module within a day. The second partition calculation unit is connected to the database and is used to obtain the actual power generation data of each photovoltaic module, divide it according to the number information of each photovoltaic module in the database, calculate the sum of the power generation of each photovoltaic module in the same photovoltaic area, and generate the actual power generation data Wt of each photovoltaic area.

6. A photovoltaic power station PR value monitoring system according to claim 5, characterized in that, The statistical analysis module includes: The PR value calculation unit, connected to the partition calculation unit one and the partition calculation unit two, is used to substitute the ideal power generation data W0 and the actual power generation data Wt of each photovoltaic region into the PR value calculation model to obtain the PR value of each photovoltaic region; the PR value calculation model is PRn=Wnt / Wn0; where PRn represents the PR value of photovoltaic region n; A historical storage unit, connected to the PR value calculation unit, is used to store the PR values ​​calculated daily and to divide the area according to the photovoltaic region corresponding to the PR value. A plotting unit, connected to the historical storage unit, is used to copy the PR values ​​of each photovoltaic region for that day and the number of days prior to that day from the historical storage unit, and substitute them into different coordinate axes; using the date as the X-axis and the PR value as the Y-axis, a trend curve of each photovoltaic region is plotted. The determination unit, which is connected to the drawing unit, is used to obtain the curve features in the trend curves of each photovoltaic region, compare them with preset feature standards, identify photovoltaic regions with abnormal trends, and generate abnormal region information.

7. A photovoltaic power station PR value monitoring system according to claim 6, characterized in that, The preset number of days is the 15 days prior to the current day.

8. A photovoltaic power station PR value monitoring system according to claim 7, characterized in that, The abnormal component acquisition module includes: A standard setting unit, connected to the preset ideal power generation calculation model and the PR value calculation unit, is used to replace the maximum value Pn of the rated power data of the photovoltaic modules in photovoltaic region n with the minimum value Qn of the rated power data of the photovoltaic modules in photovoltaic region n, and substitute it into the preset ideal power generation calculation model Wn1=E*T*Qn*Sn to obtain the minimum ideal power generation data Wn1; and substitute it and the actual power generation data Wt into the PR value calculation model to obtain the PR value standard for each photovoltaic region. The PR value comparison unit, together with the PR value calculation unit and the standard setting unit, compares the PR value of each photovoltaic region with the corresponding PR value standard for each photovoltaic region to obtain photovoltaic region information that is lower than the PR value standard. The reverse analysis unit, connected to the PR value comparison unit and the database, is used to obtain from the database the maximum rated power data Pn of the photovoltaic area information that is lower than the PR value standard, the actual power generation data Wt of the photovoltaic area, the irradiance data E, and the irradiance time data T; substitute these values ​​into the preset ideal power generation calculation model to calculate the sum of the actual effective area data S0 of the photovoltaic modules in the photovoltaic area; and calculate the difference δS between the sum of the ideal effective area data Sn and the sum of the actual effective area data S0. The component information determination unit is connected to the reverse analysis unit. It determines the abnormal area information in the photovoltaic area based on the difference δS, determines the number of abnormal photovoltaic components based on the abnormal area information, and generates abnormal component information.

9. A photovoltaic power station PR value monitoring system according to claim 8, characterized in that, The alarm display module includes: The display unit, which is connected to the drawing unit, is used to display trend curves for each photovoltaic region; An alarm unit, connected to the determination unit and the component information determination unit, is used to send the abnormal area information and abnormal component information together to the terminal device of the maintenance personnel.

10. A photovoltaic power station PR value monitoring system according to claim 9, characterized in that, The alarm display module also includes: A feedback unit, which is connected to the display unit and the terminal device of the maintenance personnel, is used to generate a feedback signal after the personnel confirm the completion of the maintenance through the terminal device, and send it to the display unit to display the maintenance result.

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