Compatibility analysis method and device for photovoltaic module and inverter, and medium

Abstract

The invention discloses a compatibility analysis method and device for a photovoltaic module and an inverter and a medium. Relates to the field of photovoltaic power generation, solves the problem that compatibility judgment of a photovoltaic module and an inverter is inaccurate, judges compatibility without depending on single module parameters or inverter parameters, comprehensively collects various module related parameters including open-circuit voltage of the module, voltage at the maximum power, short-circuit current and temperature coefficient of the module, and improves the compatibility of the photovoltaic module and the inverter. And meanwhile, the performance of the assembly under different working conditions is evaluated and predicted more accurately in combination with the actual working environment temperature. The design, operation and maintenance efficiency of the photovoltaic power station is improved, the power generation efficiency reduction and equipment failure risk caused by the compatibility problem are reduced, and the dependence on manual calculation and experience judgment of professionals is reduced. The temperature information of the actual working environment is considered and is not limited to data under standard test conditions any more, and challenges brought by temperature changes can be better coped with.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation, and in particular to a method, device and medium for analyzing the compatibility of photovoltaic modules and inverters. Background Art

[0002] In the design of solar photovoltaic power stations, the power generation of photovoltaic modules is an important factor to consider when selecting inverters. The function of the inverter is to convert the direct current generated by the photovoltaic modules into alternating current for use in the power grid. The choice of inverter must match the power generation capacity of the photovoltaic modules to ensure that the power station can operate efficiently.

[0003] The compatibility of PV panels and inverters usually requires professionals to perform manual calculations and make judgments based on experience. This method is inefficient and prone to human errors.

[0004] It can be seen that how to solve the problem of inaccurate compatibility judgment between photovoltaic modules and inverters is a technical problem that needs to be solved urgently by people in this field. Summary of the invention

[0005] The purpose of this application is to provide a method, device and medium for analyzing the compatibility of photovoltaic modules and inverters, so as to solve the problem of inaccurate compatibility judgment between photovoltaic modules and inverters.

[0006] In order to solve the above technical problems, the present application provides a compatibility analysis method between a photovoltaic module and an inverter, comprising:

[0007] Obtain the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter;

[0008] Obtaining an open circuit voltage extreme value, a peak power voltage extreme value, and a short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and a preset working environment temperature;

[0009] Determining whether the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value all satisfy the compatibility range corresponding to the operating parameters;

[0010] If yes, it is determined that the photovoltaic assembly to be analyzed is compatible with the inverter;

[0011] If not, it is determined that the photovoltaic assembly to be analyzed is not compatible with the inverter and compatibility exception information is output.

[0012] As an optional solution, in the above-mentioned method for analyzing the compatibility of photovoltaic modules and inverters, the step of obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed includes:

[0013] Receiving model information of the photovoltaic module to be analyzed;

[0014] According to the model information, similar photovoltaic components that meet similarity conditions are selected from a component library;

[0015] Receiving modification information of the similar photovoltaic components sent by a user;

[0016] Creating parameter information of the photovoltaic assembly to be analyzed according to the modification information;

[0017] The open circuit voltage, peak power voltage and short circuit current parameters under standard test conditions are obtained according to the parameter information of the photovoltaic module to be analyzed.

[0018] As an optional solution, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed includes:

[0019] According to the normal voltage curve and the normal current curve of the photovoltaic module to be analyzed under normal working conditions and at nominal working temperature;

[0020] Correspondingly, obtaining the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and the preset working environment temperature includes:

[0021] Real-time acquisition of the real-time current change curve and the real-time voltage change curve of the photovoltaic module to be analyzed at the nominal operating temperature;

[0022] Correspondingly, judging whether the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value all satisfy the compatibility range corresponding to the operating parameters includes:

[0023] It is determined whether the real-time current change curve and the real-time voltage change curve both meet a compatible fluctuation range according to the normal voltage curve and the normal current curve.

[0024] As an optional solution, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the open circuit voltage extreme value according to the open circuit voltage and the preset working environment temperature includes:

[0025] Get the voltage temperature coefficient;

[0026] Obtaining a maximum open circuit voltage value and a minimum open circuit voltage value according to the preset working environment temperature, the voltage temperature coefficient, the open circuit voltage, and the first formula;

[0027] Among them, the first formula is:

[0028] or ;

[0029] In the above formula, Indicates the maximum open circuit voltage, Indicates the minimum open circuit voltage. represents the open circuit voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0030] As an optional solution, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the peak power voltage extreme value according to the peak power voltage and the preset working environment temperature includes:

[0031] Obtaining a peak power voltage maximum value and a peak power voltage minimum value according to the preset working environment temperature, the voltage temperature coefficient, the peak power voltage, and the second formula;

[0032] Wherein, the second formula is:

[0033] or ;

[0034] In the above formula, Indicates the maximum value of peak power voltage, Indicates the minimum value of peak power voltage, represents the peak power voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0035] As an optional solution, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the short-circuit current extreme value according to the short-circuit current and the preset working environment temperature includes:

[0036] Get the current temperature coefficient;

[0037] Obtaining a short-circuit current maximum value according to the preset working environment temperature, the current temperature coefficient, the short-circuit current, and the third formula;

[0038] Wherein, the third formula is:

[0039] or ;

[0040] In the above formula, Indicates the maximum short-circuit current value, Indicates the short-circuit current, represents the current temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0041] As an optional solution, in the above-mentioned method for analyzing the compatibility of photovoltaic modules and inverters, the step of obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed includes:

[0042] Obtain the real-time operating data of the photovoltaic modules to be analyzed and perform preprocessing;

[0043] Correspondingly, obtaining the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and the preset working environment temperature includes:

[0044] The open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value are obtained according to the pre-processed real-time operation data.

[0045] In order to solve the above technical problems, the present application provides a compatibility analysis device for photovoltaic modules and inverters, comprising:

[0046] An acquisition module is used to acquire the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter;

[0047] A processing module, used for obtaining an open circuit voltage extreme value, a peak power voltage extreme value and a short circuit current extreme value according to the open circuit voltage, the peak power voltage and the short circuit current, and a preset working environment temperature;

[0048] A judgment module, used to judge whether the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value all meet the compatibility range corresponding to the working parameters; if so, triggering a normal compatibility module, if not, triggering an abnormal compatibility module;

[0049] A compatible normal module is used to determine whether the photovoltaic assembly to be analyzed is compatible with the inverter;

[0050] The compatibility exception module is used to determine that the photovoltaic component to be analyzed is not compatible with the inverter and output compatibility exception information.

[0051] In order to solve the above technical problems, the present application provides a compatibility analysis device for photovoltaic modules and inverters, comprising:

[0052] Memory for storing computer programs;

[0053] The processor is used to implement the steps of the above-mentioned photovoltaic module and inverter compatibility analysis method when executing the computer program.

[0054] In order to solve the above technical problems, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned photovoltaic component and inverter compatibility analysis method are implemented.

[0055] The compatibility analysis method of photovoltaic components and inverters provided in the present application includes: obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic components to be analyzed, as well as the working parameters of the inverter; obtaining the open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value according to the open circuit voltage, peak power voltage and short circuit current, and the preset working environment temperature; judging whether the open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value all meet the compatibility range corresponding to the working parameters; if so, determining that the current photovoltaic component to be analyzed is compatible with the inverter; if not, determining that the current photovoltaic component to be analyzed is incompatible with the inverter and outputting compatibility exception information. The present application does not rely solely on a single component parameter or inverter parameter to judge compatibility, but comprehensively collects multiple component-related parameters including the open circuit voltage of the component, the voltage at maximum power, the short circuit current and its temperature coefficient, and at the same time combines the actual working environment temperature to more accurately evaluate and predict the performance of the component under different working conditions. It not only improves the efficiency of photovoltaic power station design and operation and maintenance, but also reduces the risk of reduced power generation efficiency and equipment failure caused by compatibility issues, reduces the reliance on manual calculations and experience judgments by professionals, improves the automation level of compatibility checks, and reduces the possibility of human errors. Taking into account the temperature information of the actual working environment, it is no longer limited to data under standard test conditions, and can better cope with the challenges brought by temperature changes, providing a strong guarantee for the long-term stable operation of photovoltaic power stations.

[0056] In addition, the present application also provides a device and a medium, which correspond to the above-mentioned compatibility analysis method of photovoltaic components and inverters, and have the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 A flowchart of a method for analyzing compatibility between a photovoltaic module and an inverter is provided for an embodiment of the present application;

[0059] Figure 2 A schematic diagram of curve compatibility provided in an embodiment of the present application;

[0060] Figure 3A structural diagram of a photovoltaic module and inverter compatibility analysis device provided in an embodiment of the present application;

[0061] Figure 4 A structural diagram of another photovoltaic module and inverter compatibility analysis device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] The core of this application is to provide a method, device and medium for compatibility analysis between photovoltaic modules and inverters.

[0064] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0065] To solve the above problems, the present application provides a method for analyzing the compatibility of a photovoltaic module and an inverter. Figure 1 As shown, including:

[0066] S11: Obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter;

[0067] S12: Obtaining an open circuit voltage extreme value, a peak power voltage extreme value, and a short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and a preset working environment temperature;

[0068] S13: Determine whether the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value all meet the compatible range corresponding to the working parameters;

[0069] S14: If yes, it is determined that the current PV module to be analyzed is compatible with the inverter;

[0070] S15: If not, it is determined that the current PV module to be analyzed is incompatible with the inverter and compatibility exception information is output.

[0071] In step S11, obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed refers to collecting the basic electrical parameters of the photovoltaic module under standard test conditions (Standard Test Conditions, STC). These parameters are key indicators of the performance of photovoltaic modules, and can be specifically the product parameters provided by the photovoltaic module manufacturer. The operating parameters of the inverter refer to the input voltage and current range that the inverter can accept, etc. These parameters determine the compatibility between the inverter and the photovoltaic module, and can be specifically the data in the technical specification of the inverter. In this step, a basic understanding of photovoltaic modules and inverters is achieved by inputting these parameters. It should be noted that in order to achieve the accuracy of compatibility analysis, the parameters are accurately input through step S11; it is not limited to manual input, and data can be automatically read or imported; in this field, it is common to provide these data in the form of a database or spreadsheet.

[0072] Users can customize new components by manually inputting various parameters. This method gives users the greatest freedom and creativity, and can meet special demand scenarios where suitable components cannot be found in the public component library, further expanding the scope and possibilities of component management.

[0073] Users can directly select the required components from the public component library and import them into the component library of this system. This method provides users with a quick way to obtain common components, saves users time and energy in finding and entering component information, and improves the efficiency of component management.

[0074] Step S12 obtains the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value according to the open circuit voltage, the peak power voltage and the short circuit current, and the preset working environment temperature. The open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value refer to the maximum and minimum voltage and current values ​​that the photovoltaic module may reach under extreme temperature conditions. These extreme values ​​are important parameters for evaluating the performance of the photovoltaic module under different environmental conditions, and can be specifically the maximum and minimum values ​​calculated according to the temperature coefficient. The preset working environment temperature refers to the highest and lowest temperatures that may occur in the area where the photovoltaic power station is located. These temperatures have a direct impact on the performance of the photovoltaic module, and can be specifically the average value of historical meteorological data. In this step, the prediction of the extreme value is realized by formula calculation. It should be noted that in order to realize the accurate evaluation of the performance of the photovoltaic module at different temperatures, the extreme value is calculated by step S12; it is not limited to a specific calculation formula, and can be a variety of formulas or models; in this field, it is common to use the temperature coefficient provided by the manufacturer for calculation.

[0075] In step S13, judgment refers to comparing the calculated extreme values ​​of the photovoltaic modules with the operating parameters of the inverter to determine whether they are within the acceptable range of the inverter. These comparisons are key steps in compatibility analysis, and can be specifically compared to see whether the value of each parameter falls within the compatible range specified by the inverter. In this step, a preliminary evaluation of compatibility is achieved through logical judgment. It should be noted that in order to accurately judge the compatibility of photovoltaic modules and inverters, parameter comparison is performed through step S13; it is not limited to a single comparison method, and can be a variety of comparison logics or algorithms.

[0076] Based on the judgment result of step S13, a final conclusion is given as to whether the photovoltaic module and the inverter are compatible. This conclusion is the direct output of the compatibility analysis and can be specifically a clear compatible or incompatible mark. Outputting compatible abnormal information means providing specific reasons and suggestions when the photovoltaic module and the inverter are incompatible. This information helps the user understand the problem and take corresponding measures. It can be specifically listed as incompatible parameters and possible solutions. In this step, the final compatibility judgment is achieved through decision logic. It should be noted that in order to achieve a rapid response to the compatibility issues of photovoltaic modules and inverters, the final judgment and the output of abnormal information are performed; it is not limited to a specific output format, and can be text, charts or alarms; in this field, it is common to use a graphical user interface (GUI) to display results and suggestions.

[0077] A compatibility analysis method for photovoltaic components and inverters provided by an embodiment of the present application includes: obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic component to be analyzed, as well as the working parameters of the inverter; obtaining the open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value according to the open circuit voltage, peak power voltage and short circuit current, and the preset working environment temperature; judging whether the open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value all meet the compatible range corresponding to the working parameters; if so, determining that the current photovoltaic component to be analyzed is compatible with the inverter; if not, determining that the current photovoltaic component to be analyzed is incompatible with the inverter and outputting compatibility exception information. The present application does not rely solely on a single component parameter or inverter parameter to judge compatibility, but comprehensively collects multiple component-related parameters including the open circuit voltage of the component, the voltage at maximum power, the short circuit current and its temperature coefficient, and at the same time combines the actual working environment temperature to more accurately evaluate and predict the performance of the component under different working conditions. It not only improves the efficiency of photovoltaic power station design and operation and maintenance, but also reduces the risk of reduced power generation efficiency and equipment failure caused by compatibility issues, reduces the reliance on manual calculations and experience judgments by professionals, improves the automation level of compatibility checks, and reduces the possibility of human errors. Taking into account the temperature information of the actual working environment, it is no longer limited to data under standard test conditions, and can better cope with the challenges brought by temperature changes, providing a strong guarantee for the long-term stable operation of photovoltaic power stations.

[0078] In order to improve the flexibility and accuracy of obtaining photovoltaic module parameters, especially when no direct test data is available, in a specific embodiment, the above photovoltaic module and inverter compatibility analysis method obtains the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, including:

[0079] Receiving model information of the photovoltaic module to be analyzed;

[0080] Filter similar photovoltaic modules that meet similarity conditions from the module library according to the model information;

[0081] Receive modification information of similar photovoltaic modules sent by users;

[0082] Create parameter information of the photovoltaic module to be analyzed according to the modification information;

[0083] The open circuit voltage, peak power voltage and short circuit current parameters under standard test conditions are obtained according to the parameter information of the photovoltaic module to be analyzed.

[0084] Since not all PV modules have direct test data, by screening similar modules, the known parameters of these similar modules can be used as references to indirectly obtain the parameters of the module to be analyzed. First, determine the specific PV module model that the user needs to analyze, and find a known module with similar characteristics to the PV module to be analyzed.

[0085] Users can adjust the parameters of similar components according to specific needs or known differences. New components that meet specific needs are created based on the modification information provided by users and imported into the component library. This method not only utilizes the existing resources of the public component library, but also allows users to make personalized adjustments based on actual conditions, greatly enhancing the flexibility and adaptability of component management.

[0086] In a specific embodiment, the above-mentioned photovoltaic module and inverter compatibility analysis method obtains the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, including:

[0087] According to the normal voltage curve and normal current curve of the photovoltaic module to be analyzed under normal working conditions and nominal working temperature;

[0088] Correspondingly, the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value are obtained according to the open circuit voltage, the peak power voltage and the short circuit current, as well as the preset working environment temperature, including:

[0089] Real-time collection of the real-time current change curve and real-time voltage change curve of the photovoltaic module to be analyzed at the nominal operating temperature;

[0090] Correspondingly, judging whether the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value all meet the compatible range corresponding to the working parameters includes:

[0091] According to the normal voltage curve and the normal current curve, it is determined whether the real-time current change curve and the real-time voltage change curve both meet the compatible fluctuation range.

[0092] Obtaining the performance baseline of PV modules under standard operating conditions is essential for understanding the behavior of the modules under ideal conditions. By analyzing the voltage and current curves under normal working conditions, the standard performance parameters of the modules can be determined, providing a reference for subsequent compatibility analysis. These curve data can be obtained through laboratory testing or field measurements, or from the data sheet provided by the manufacturer.

[0093] Real-time acquisition of the real-time current change curve and real-time voltage change curve of the photovoltaic module to be analyzed at the nominal operating temperature is used to capture the actual performance of the photovoltaic module in the actual working environment, especially the performance changes at the nominal operating temperature. These real-time data are crucial for evaluating the performance of the module in actual operation and help determine the performance extremes of the module at extreme temperatures. Specifically, the voltage and current data are collected in real time by sensors installed on the photovoltaic module, and these data can be transmitted and stored in real time through the data acquisition system.

[0094] Judging whether the real-time current change curve and real-time voltage change curve meet the compatible fluctuation range based on the normal voltage curve and normal current curve: By comparing the performance of the PV module under normal working conditions with the real-time performance, it is judged whether the actual performance of the module is within the fluctuation range acceptable to the inverter. This helps to identify performance deviations caused by environmental changes or module aging, and ensure the compatibility between the PV module and the inverter.

[0095] Figure 2 A schematic diagram of curve compatibility provided in an embodiment of the present application, such as Figure 2 As shown in the figure, the voltage and current comparison diagram under abnormal and normal dynamic compatibility check conditions. By monitoring and analyzing key parameters under these different operating conditions, the dynamic compatibility between PV modules and inverters in various conditions such as stable operation or high-load operation can be comprehensively evaluated.

[0096] In a specific embodiment, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the open circuit voltage extreme value according to the open circuit voltage and the preset working environment temperature includes:

[0097] Get the voltage temperature coefficient;

[0098] According to the preset working environment temperature, voltage temperature coefficient, open circuit voltage, and the first formula, a maximum open circuit voltage value and a minimum open circuit voltage value are obtained;

[0099] Among them, the first formula is:

[0100] or ;

[0101] In the above formula, Indicates the maximum open circuit voltage, Indicates the minimum open circuit voltage. Indicates open circuit voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0102] The voltage temperature coefficient is a parameter that describes the change of the open circuit voltage of a photovoltaic module with temperature. Obtaining this coefficient is essential for calculating the extreme values ​​of the open circuit voltage at different temperatures. The voltage temperature coefficient is usually provided by the manufacturer of the photovoltaic module and can be obtained by consulting the technical manual or directly from the specification sheet of the module.

[0103] Use the first formula provided and select the appropriate formula for calculation according to different temperature units (Celsius or Kelvin). According to the open circuit voltage and voltage temperature coefficient of the photovoltaic module and the preset operating ambient temperature range, calculate the maximum and minimum values ​​of the open circuit voltage at extreme temperatures. These extreme values ​​are crucial for evaluating the performance of photovoltaic modules under different environmental conditions.

[0104] When the unit is % / ℃, select ;

[0105] When the unit is mV / ℃, select .

[0106] By considering the effect of temperature on open-circuit voltage, the performance of PV modules under different environmental conditions can be predicted more accurately, thereby improving the accuracy of compatibility analysis with inverters.

[0107] In a specific embodiment, in the above-mentioned photovoltaic module and inverter compatibility analysis method, obtaining the peak power voltage extreme value according to the peak power voltage and the preset working environment temperature includes:

[0108] According to the preset working environment temperature, voltage temperature coefficient, peak power voltage, and the second formula, a peak power voltage maximum value and a peak power voltage minimum value are obtained;

[0109] Among them, the second formula is:

[0110] or ;

[0111] In the above formula, Indicates the maximum value of peak power voltage, Indicates the minimum value of peak power voltage, Indicates peak power voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0112] This step aims to calculate the maximum and minimum values ​​of the peak power voltage at extreme temperatures based on the peak power voltage and voltage temperature coefficient of the PV module and the preset operating ambient temperature range. These extreme values ​​are critical to evaluating the performance of PV modules under different environmental conditions and are necessary to ensure the accuracy of the compatibility analysis between PV modules and inverters. Select the appropriate formula for calculation according to different temperature units (Celsius or Kelvin).

[0113] When the unit is % / ℃, select ;

[0114] When the unit is mV / ℃, select .

[0115] In a specific embodiment, in the above-mentioned photovoltaic assembly and inverter compatibility analysis method, obtaining the short-circuit current extreme value according to the short-circuit current and the preset working environment temperature includes:

[0116] Get the current temperature coefficient;

[0117] According to the preset working environment temperature, current temperature coefficient, short-circuit current, and the third formula, the short-circuit current maximum value is obtained;

[0118] Among them, the third formula is:

[0119] or ;

[0120] In the above formula, Indicates the maximum short-circuit current value, Indicates short circuit current, represents the current temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

[0121] The current temperature coefficient is a parameter that describes the change of the short-circuit current of a photovoltaic module with temperature. Obtaining this coefficient is essential for calculating the extreme value of the short-circuit current at different temperatures. The current temperature coefficient is usually provided by the manufacturer of the photovoltaic module and can be obtained by consulting the technical manual or directly from the specification sheet of the module.

[0122] According to the short-circuit current and current temperature coefficient of the photovoltaic module, as well as the preset operating ambient temperature range, the maximum value of the short-circuit current at extreme temperatures is calculated. This maximum value is critical to evaluating the performance of photovoltaic modules under different environmental conditions, and is necessary to ensure the accuracy of the compatibility analysis between photovoltaic modules and inverters. Use the third formula provided to select the appropriate formula for calculation according to different temperature units (Celsius or Kelvin).

[0123] When the unit is % / ℃, select ;

[0124] When the unit is mA / ℃, select .

[0125] By considering the effect of temperature on short-circuit current, the performance of PV modules under different environmental conditions can be predicted more accurately, thereby improving the accuracy of compatibility analysis with inverters. It can adapt to temperature changes in different regions, ensure that PV modules are compatible with inverters under various environmental conditions, and improve the stability and reliability of PV power stations.

[0126] In a specific embodiment, in the above-mentioned photovoltaic assembly and inverter compatibility analysis method, obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic assembly to be analyzed includes:

[0127] Obtain the real-time operating data of the photovoltaic modules to be analyzed and perform preprocessing;

[0128] Correspondingly, the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value are obtained according to the open circuit voltage, the peak power voltage and the short circuit current, as well as the preset working environment temperature, including:

[0129] The open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value are obtained according to the pre-processed real-time operation data.

[0130] Collect data generated by PV modules in actual operation, which is crucial for analyzing module performance. Preprocessing is to ensure the accuracy and availability of data for subsequent analysis. Preprocessing techniques such as filtering, denoising, and outlier detection are used to clean the data.

[0131] The performance extremes of PV modules at specific operating ambient temperatures are extracted from the preprocessed data. These extremes are crucial for evaluating the performance of PV modules under different environmental conditions and ensuring compatibility with inverters.

[0132] In the above embodiments, the compatibility analysis method of photovoltaic components and inverters is described in detail, and the present application also provides embodiments corresponding to the compatibility analysis device of photovoltaic components and inverters. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the functional module perspective, and the other is based on the hardware perspective.

[0133] From the perspective of functional modules, Figure 3 A structural diagram of a photovoltaic module and inverter compatibility analysis device provided in an embodiment of the present application, such as Figure 3 As shown, a compatibility analysis device for a photovoltaic module and an inverter includes:

[0134] An acquisition module 21 is used to acquire the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter;

[0135] The processing module 22 is used to obtain the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value according to the open circuit voltage, the peak power voltage and the short circuit current, and the preset working environment temperature;

[0136] The judgment module 23 is used to judge whether the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value all meet the compatibility range corresponding to the working parameters; if so, the compatibility normal module is triggered, and if not, the compatibility abnormal module is triggered;

[0137] A compatible normal module 24 is used to determine whether the photovoltaic component to be analyzed is compatible with the inverter;

[0138] The compatibility exception module 25 is used to determine whether the photovoltaic component to be analyzed is incompatible with the inverter and output compatibility exception information.

[0139] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0140] Figure 4 A structural diagram of another photovoltaic module and inverter compatibility analysis device provided in an embodiment of the present application, such as Figure 4 As shown, the compatibility analysis device for photovoltaic modules and inverters includes: a memory 30 for storing a computer program;

[0141] The processor 31 is used to implement the steps of the method for obtaining user operation habit information in the above embodiment (compatibility analysis method between photovoltaic modules and inverters) when executing a computer program.

[0142] The photovoltaic module and inverter compatibility analysis device provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer or a desktop computer.

[0143] Among them, the processor 31 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 31 may be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 31 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 31 may be integrated with a graphics processing unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 31 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0144] The memory 30 may include one or more computer-readable storage media, which may be non-transitory. The memory 30 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 30 is at least used to store the following computer program 301, wherein, after the computer program is loaded and executed by the processor 31, it can implement the relevant steps of the compatibility analysis method of the photovoltaic component and the inverter disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 30 may also include an operating system 302 and data 303, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 302 may include Windows, Unix, Linux, etc. Data 303 may include but is not limited to data involved in implementing the compatibility analysis method of the photovoltaic component and the inverter.

[0145] In some embodiments, the photovoltaic assembly and inverter compatibility analysis device may further include a display screen 32 , an input / output interface 33 , a communication interface 34 , a power supply 35 , and a communication bus 36 .

[0146] Those skilled in the art will understand that Figure 4 The structure shown in the figure does not constitute a limitation on the compatibility analysis device for photovoltaic components and inverters, and may include more or fewer components than those shown in the figure.

[0147] The photovoltaic module and inverter compatibility analysis device provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: photovoltaic module and inverter compatibility analysis method.

[0148] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps described in the embodiment of the compatibility analysis method for photovoltaic modules and inverters are implemented.

[0149] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the methods of each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0150] The computer-readable storage medium provided in this embodiment stores a computer program, and when a processor executes the program, the following method can be implemented: a compatibility analysis method between a photovoltaic module and an inverter.

[0151] The above is a detailed introduction to the compatibility analysis method, device and medium for photovoltaic modules and inverters provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0152] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A compatibility analysis method for photovoltaic modules and inverters, characterized in that: include: Obtain the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter; Obtaining an open circuit voltage extreme value, a peak power voltage extreme value, and a short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and a preset working environment temperature; Determining whether the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value all satisfy the compatibility range corresponding to the operating parameters; If yes, it is determined that the photovoltaic assembly to be analyzed is compatible with the inverter; If not, it is determined that the photovoltaic assembly to be analyzed is not compatible with the inverter and compatibility exception information is output.

2. The compatibility analysis method of photovoltaic modules and inverters according to claim 1, characterized in that: The step of obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed includes: Receiving model information of the photovoltaic module to be analyzed; According to the model information, similar photovoltaic components that meet similarity conditions are selected from a component library; Receiving modification information of the similar photovoltaic components sent by a user; Creating parameter information of the photovoltaic assembly to be analyzed according to the modification information; The open circuit voltage, peak power voltage and short circuit current parameters under standard test conditions are obtained according to the parameter information of the photovoltaic module to be analyzed.

3. The compatibility analysis method of photovoltaic modules and inverters according to claim 1, characterized in that: Obtain the open circuit voltage, peak power voltage and short circuit current of the PV module to be analyzed, including: According to the normal voltage curve and the normal current curve of the photovoltaic module to be analyzed under normal working conditions and at nominal working temperature; Correspondingly, obtaining the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and the preset working environment temperature includes: Real-time acquisition of the real-time current change curve and the real-time voltage change curve of the photovoltaic module to be analyzed at the nominal operating temperature; Correspondingly, judging whether the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value all satisfy the compatibility range corresponding to the operating parameters includes: It is determined whether the real-time current change curve and the real-time voltage change curve both meet a compatible fluctuation range according to the normal voltage curve and the normal current curve.

4. The compatibility analysis method of photovoltaic modules and inverters according to claim 3, characterized in that: Obtaining an open circuit voltage extreme value according to the open circuit voltage and a preset working environment temperature includes: Get the voltage temperature coefficient; Obtaining a maximum open circuit voltage value and a minimum open circuit voltage value according to the preset working environment temperature, the voltage temperature coefficient, the open circuit voltage, and the first formula; Among them, the first formula is: or ; In the above formula, Indicates the maximum open circuit voltage, Indicates the minimum open circuit voltage. represents the open circuit voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

5. The compatibility analysis method of photovoltaic modules and inverters according to claim 4, characterized in that: Obtaining a peak power voltage extreme value according to the peak power voltage and a preset working environment temperature includes: Obtaining a peak power voltage maximum value and a peak power voltage minimum value according to the preset working environment temperature, the voltage temperature coefficient, the peak power voltage, and the second formula; Wherein, the second formula is: or ; In the above formula, Indicates the maximum value of peak power voltage, Indicates the minimum value of peak power voltage, represents the peak power voltage, Indicates the voltage temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

6. The compatibility analysis method of photovoltaic modules and inverters according to claim 4, characterized in that: Obtaining a short-circuit current extreme value according to the short-circuit current and a preset working environment temperature includes: Get the current temperature coefficient; Obtaining a short-circuit current maximum value according to the preset working environment temperature, the current temperature coefficient, the short-circuit current, and the third formula; Wherein, the third formula is: or ; In the above formula, Indicates the maximum short-circuit current value, Indicates the short-circuit current, represents the current temperature coefficient, Indicates the maximum preset working environment temperature. Preset the minimum working environment temperature.

7. The compatibility analysis method of photovoltaic modules and inverters according to claim 1, characterized in that: The step of obtaining the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed includes: Obtain the real-time operating data of the photovoltaic modules to be analyzed and perform preprocessing; Correspondingly, obtaining the open circuit voltage extreme value, the peak power voltage extreme value, and the short circuit current extreme value according to the open circuit voltage, the peak power voltage, the short circuit current, and the preset working environment temperature includes: The open circuit voltage extreme value, peak power voltage extreme value and short circuit current extreme value are obtained according to the pre-processed real-time operation data.

8. A compatibility analysis device for photovoltaic modules and inverters, characterized in that: include: An acquisition module is used to acquire the open circuit voltage, peak power voltage and short circuit current of the photovoltaic module to be analyzed, as well as the working parameters of the inverter; A processing module, used for obtaining an open circuit voltage extreme value, a peak power voltage extreme value and a short circuit current extreme value according to the open circuit voltage, the peak power voltage and the short circuit current, and a preset working environment temperature; A judgment module, used to judge whether the open circuit voltage extreme value, the peak power voltage extreme value and the short circuit current extreme value all meet the compatibility range corresponding to the working parameters; if so, triggering a normal compatibility module, if not, triggering an abnormal compatibility module; A compatible normal module is used to determine whether the photovoltaic assembly to be analyzed is compatible with the inverter; The compatibility exception module is used to determine that the photovoltaic component to be analyzed is not compatible with the inverter and output compatibility exception information.

9. A compatibility analysis device for photovoltaic modules and inverters, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the photovoltaic component and inverter compatibility analysis method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the photovoltaic component and inverter compatibility analysis method according to any one of claims 1 to 7 are implemented.

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