Electrical parameter calculation method and device of photovoltaic module, equipment and medium

Abstract

The invention relates to the technical field of photovoltaic operation and maintenance, and discloses an electrical parameter calculation method, device, equipment and medium for a photovoltaic module, and the method comprises the steps: obtaining the actual working condition of a to-be-tested photovoltaic module, and the actual working condition comprises at least one of solar irradiance and temperature; determining an electrical parameter model matched with the actual working condition, wherein the electrical parameter model represents electrical characteristics of the photovoltaic module to be tested; based on the electrical parameter model, initial electrical parameters of the photovoltaic module to be tested are obtained, and the initial electrical parameters comprise at least one of open-circuit voltage and short-circuit current; and determining electrical parameters under the first working condition according to the initial electrical parameters. The detection efficiency of the photovoltaic module can be improved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic operation and maintenance technology, and in particular to a method, device, equipment and medium for calculating electrical parameters of a photovoltaic module. Background Art

[0002] Energy is the basis of human survival. With the increasing maturity of photovoltaic power generation technology and the strong support of national policies for the photovoltaic industry, the application of photovoltaic power generation is becoming more and more popular. Photovoltaic modules are one of the most important components of photovoltaic power stations. Obtaining the electrical parameters of photovoltaic modules can facilitate subsequent monitoring and optimization of the system.

[0003] In the related art, electrical parameters of photovoltaic modules are monitored by manual inspection to determine whether the photovoltaic modules are normal, but the open circuit voltage and short circuit current of the photovoltaic modules cannot be obtained, which is time-consuming and labor-intensive.

[0004] In view of this, a method for calculating electrical parameters to improve the detection efficiency of photovoltaic modules is needed. Summary of the invention

[0005] In view of this, the present invention provides a method for calculating electrical parameters of a photovoltaic module to improve the detection efficiency of the photovoltaic module.

[0006] In a first aspect, the present invention provides a method for calculating electrical parameters of a photovoltaic component, the method comprising: obtaining actual working conditions of the photovoltaic component to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature; determining an electrical parameter model that matches the actual working conditions, wherein the electrical parameter model characterizes electrical characteristics of the photovoltaic component to be tested; based on the electrical parameter model, obtaining initial electrical parameters of the photovoltaic component to be tested, wherein the initial electrical parameters include at least one of open-circuit voltage and short-circuit current; and determining the electrical parameters under first working conditions based on the initial electrical parameters.

[0007] In this embodiment, the solar irradiance and temperature have an impact on the working state of the photovoltaic module to be tested. By obtaining the actual working conditions of the photovoltaic module to be tested and determining an electrical parameter model that matches the actual working conditions, the accuracy of the acquired electrical model parameters can be improved. Then, the test and evaluation of the photovoltaic module to be tested is completed, and the test efficiency and working stability of the photovoltaic module are improved.

[0008] In an optional embodiment, before determining the electrical parameter model that matches the actual working conditions, the method also includes: obtaining at least two typical operating points of the photovoltaic component to be tested, wherein the typical operating points include at least one of solar irradiance and temperature; performing parameter fitting on the typical operating points to obtain initial model parameters, wherein the initial model parameters match the photovoltaic component to be tested and the typical operating points; and based on the fitting results, establishing an electrical parameter model that matches the typical operating points.

[0009] In this embodiment, an electrical parameter model is constructed to quickly obtain the electrical parameters of the photovoltaic module and improve the detection efficiency.

[0010] In an optional implementation, the initial model parameters include open circuit voltage and short circuit current.

[0011] In this embodiment, the open circuit voltage and the short circuit current are obtained to determine whether the photovoltaic module is working normally, thereby improving the detection efficiency of the photovoltaic module.

[0012] In an optional implementation, the initial model parameters include at least one of an operating voltage, an operating current, and a maximum power point.

[0013] In this implementation, the initial model parameters include at least one of an operating voltage, an operating current, and a maximum power point, which can improve the applicability of the method.

[0014] In an optional implementation, the fitting result is the relationship between the electrical parameters of the photovoltaic module to be tested and the typical operating point.

[0015] In this embodiment, the relationship between the electrical parameters and the typical operating points is obtained, so that the electrical parameters of the photovoltaic module to be tested can be quickly obtained.

[0016] In an optional implementation, the photovoltaic component to be tested is a photovoltaic cell.

[0017] In this embodiment, a photovoltaic cell is used as a component to be tested, which can improve the flexibility of the method.

[0018] In an optional implementation, the first working condition is that the photovoltaic assembly to be tested is at a target solar irradiance and a target ambient temperature.

[0019] In this implementation, by setting the first working condition, the electrical parameters under standard conditions can be mastered, which facilitates monitoring of the working state of the photovoltaic assembly to be tested.

[0020] In a second aspect, the present invention provides an electrical parameter calculation device for a photovoltaic component, the device comprising: a working condition acquisition module, used to obtain the actual working conditions of the photovoltaic component to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature; a determination module, used to determine an electrical parameter model that matches the actual working conditions, wherein the electrical parameter model characterizes the electrical characteristics of the photovoltaic component to be tested; a parameter acquisition module, used to obtain the initial electrical parameters of the photovoltaic component to be tested based on the electrical parameter model, wherein the initial electrical parameters include at least one of open-circuit voltage and short-circuit current; a parameter determination module, used to determine the electrical parameters under a first working condition based on the initial electrical parameters.

[0021] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method for calculating electrical parameters of a photovoltaic module according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0022] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for calculating electrical parameters of a photovoltaic component according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic flow chart of a method for calculating electrical parameters of a photovoltaic module according to an embodiment of the present invention;

[0025] Figure 2 is a schematic flow chart of another method for calculating electrical parameters of a photovoltaic module according to an embodiment of the present invention;

[0026] Figure 3 is a structural block diagram of an electrical parameter calculation device for a photovoltaic module according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] According to an embodiment of the present invention, an embodiment of a method for calculating electrical parameters of a photovoltaic module is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0030] First, in an exemplary embodiment of the present application, a photovoltaic module electrical parameter calculation system is provided, which includes a server and a terminal device.

[0031] Optionally, the terminal device in the embodiment of the present application may be a PC (Personal Computer), a smart phone, a tablet computer, or other devices with high computing capabilities.

[0032] Optionally, the terminal device has a network communication module, which is used to connect to a wired network or a wireless network, and the terminal device can establish a network connection with the server through the wired network or the wireless network.

[0033] Optionally, the electrical parameter calculation system of the photovoltaic module in the embodiment of the present application also includes a photovoltaic module to be tested, and a sensor device arranged around the photovoltaic module to be tested. Further, the sensor device includes a temperature sensor to record the temperature data of the working environment of the photovoltaic module to be tested. Further, after the temperature sensor obtains the temperature data of the working environment of the photovoltaic module to be tested, the temperature data can be transmitted to the server for storage.

[0034] Optionally, the photovoltaic assembly to be tested is provided with a data acquisition unit, and the data acquisition unit can collect data when the photovoltaic assembly to be tested is in a working state, for example, obtain electrical characteristics of the photovoltaic assembly to be tested when it is in a working state.

[0035] Optionally, after the data acquisition unit on the photovoltaic assembly to be tested acquires the electrical characteristics, the electrical characteristics may be sent to a corresponding server.

[0036] Optionally, the terminal device can obtain data information related to the photovoltaic component to be tested from the server, thereby realizing the calculation of electrical parameters of the photovoltaic component to be tested.

[0037] Optionally, the above-mentioned server can be a server cluster or a distributed system composed of multiple physical servers, or it can be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN (Content Delivery Network), as well as big data and artificial intelligence platforms and other technical computing services.

[0038] Optionally, the system may further include a management device, which is used to manage the system (such as managing the connection status between each module and the server, etc.), and the management device is connected to the server via a communication network. Optionally, the communication network is a wired network or a wireless network.

[0039] Optionally, the above-mentioned wireless network or wired network uses standard communication technology and / or protocol. The network is usually the Internet, but it can also be any other network, including but not limited to any combination of local area network, metropolitan area network, wide area network, mobile, limited or wireless network, private network or virtual private network. In some embodiments, the technology and / or format including hypertext markup language, extensible markup language, etc. are used to represent the data exchanged through the network. In addition, conventional encryption technologies such as secure socket layer, transport layer security, virtual private network, Internet protocol security, etc. can also be used to encrypt all or some links. In other embodiments, customized and / or dedicated data communication technology can also be used to replace or supplement the above-mentioned data communication technology.

[0040] In this embodiment, a method for calculating electrical parameters of a photovoltaic module is provided. Figure 1 is a flow chart of a method for calculating electrical parameters of a photovoltaic module according to an embodiment of the present invention. The method is executed by a computer device, which may be the terminal device mentioned above, such as Figure 1 As shown, the process includes the following steps:

[0041] Step S101 : acquiring actual working conditions of the photovoltaic module to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature.

[0042] The photovoltaic module to be tested is a photovoltaic cell. The model of the photovoltaic cell is as follows:

[0043]

[0044] Among them, I phis the photocurrent, I0 is the reverse saturation current, V is the photovoltaic cell voltage, I is the photovoltaic cell current, R s is the series resistance, R p is the parallel resistance and a is the ideal factor.

[0045] The working condition of the photovoltaic module to be tested will be affected by the solar radiation and temperature. The performance of the photovoltaic module to be tested will be different under different solar radiation and temperature, and its electrical parameter model will also be different. Under different solar radiation, the current-voltage characteristic curve of the photovoltaic module will change, thus affecting its electrical parameters, such as open circuit voltage, short circuit current and maximum power point. Under different temperatures, the open circuit voltage and short circuit current of the photovoltaic module to be tested will change. As the temperature rises, the open circuit voltage of the photovoltaic module to be tested will decrease, the short circuit current will increase, but the overall efficiency will decrease.

[0046] By obtaining the accurate actual working conditions of the PV modules to be tested, the working status of the standard PV modules under the same working conditions can be determined, and the performance of the PV modules to be tested can be evaluated through the electrical parameter model.

[0047] Solar irradiance can be measured by a solar radiometer, and temperature can be determined by installing a temperature sensor near the photovoltaic module to be tested. The actual working conditions may also include other working conditions that affect the working performance of the photovoltaic module, such as wind speed and humidity. In the actual working conditions of the photovoltaic module to be tested, the wind speed will affect the temperature of the photovoltaic module to be tested, and the wind speed will reduce the working temperature of the photovoltaic module to be tested, thereby reducing the negative impact of temperature on the efficiency of the photovoltaic module to be tested. When the humidity in the actual working conditions of the photovoltaic module to be tested is high, it will affect the solar irradiance of the photovoltaic module to be tested, thereby reducing the working efficiency of the photovoltaic module to be tested.

[0048] Optionally, in an embodiment of the present application, when the actual working conditions include weather information such as wind speed and humidity, the computer device can determine the location information of the photovoltaic component to be tested that needs to be calculated, and access the corresponding meteorological platform based on the location information, thereby obtaining the weather information corresponding to the photovoltaic component to be tested.

[0049] Optionally, in an embodiment of the present application, sensors for meteorological measurement such as humidity sensors and wind speed sensors are also installed around the photovoltaic component to be tested. When the photovoltaic component to be tested is in working condition, the temperature sensor, humidity sensor and wind speed sensor will send the data collected by themselves to the server or terminal device for storage in real time, and bind the data to the relevant data of the photovoltaic component to be tested in the server or terminal device according to the timestamp.

[0050] Step S102 : determining an electrical parameter model that matches the actual working conditions, wherein the electrical parameter model represents the electrical characteristics of the photovoltaic module to be tested.

[0051] The electrical parameter model can be selected by collecting the electrical performance data of the photovoltaic module to be tested under different environments and selecting a suitable electrical model to describe the performance of the photovoltaic module to be tested. The electrical parameter model can select a single diode model, a double diode model, etc. according to actual conditions. The electrical parameter model can include electrical parameters such as voltage and current.

[0052] In the embodiment of the present application, the electrical parameter model may be pre-generated.

[0053] For example, when the terminal device needs to calculate the electrical parameters of the photovoltaic module to be tested, it is first necessary to collect the historical data of the photovoltaic module to be tested or the photovoltaic module of the same type as the photovoltaic module to be tested. The historical data includes the electrical parameters of the photovoltaic module and the working conditions of the photovoltaic module (i.e., the temperature, humidity, wind speed and other characteristics of the photovoltaic module), and the electrical parameters of the photovoltaic module under various working conditions are fitted with the working conditions to obtain various fitting functions as various electrical parameter models.

[0054] Specifically, in the embodiment of the present application, the temperature can be used as an independent variable, the voltage as a dependent variable, the irradiance as an independent variable, and the short-circuit current as a dependent variable to construct an electrical parameter model of voltage-temperature and short-circuit current-irradiance. In the electrical parameter model, different temperatures, humidity, and wind speeds can generate different models. Therefore, when the actual working conditions are obtained, a matching electrical parameter model can be selected based on the meteorological factors other than the independent variables.

[0055] Step S103 : acquiring initial electrical parameters of the photovoltaic assembly to be tested based on the electrical parameter model, wherein the initial electrical parameters include at least one of an open circuit voltage and a short circuit current.

[0056] The operating data of the photovoltaic module to be tested can be obtained first, and then the operating data can be input into the electrical parameter model, and the initial electrical parameters of the photovoltaic module to be tested under actual working conditions can be obtained through software tools. The initial electrical parameters can include not only the open circuit voltage and short circuit current, but also the maximum power point, etc.

[0057] Step S104: determining electrical parameters under a first working condition according to the initial electrical parameters.

[0058] The setting of the first working condition is not limited and can be determined by the staff according to the actual situation. After the first working condition is determined, the initial electrical parameters can be converted to the first working condition by modifying the formula.

[0059] In a practical application, the first working condition is a standard test condition. The initial electrical parameters include a short-circuit current, wherein the short-circuit current under the first working condition can be expressed by the following formula:

[0060]

[0061] Where I0 is the short-circuit current under the first working condition, I sc is the short-circuit current included in the initial electrical parameters, T0 is the temperature under the first working condition, T is the temperature under the actual working condition, α is the current temperature coefficient of the photovoltaic module to be tested, and K is the curve correction coefficient, which can be determined according to the characteristics of the photovoltaic module to be tested.

[0062] In the method for calculating the electrical parameters of the photovoltaic module provided in this embodiment, the solar irradiance and temperature have an impact on the working state of the photovoltaic module to be tested. By obtaining the actual working conditions of the photovoltaic module to be tested and determining an electrical parameter model that matches the actual working conditions, the accuracy of the acquired electrical model parameters can be improved. In this way, the test and evaluation of the photovoltaic module to be tested can be completed, and the test efficiency and working stability of the photovoltaic module can be improved.

[0063] In this embodiment, a method for calculating electrical parameters of a photovoltaic module is provided. Figure 2 is a flow chart of a method for calculating electrical parameters of a photovoltaic module according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0064] Step S201, obtaining at least two typical operating points of the photovoltaic module to be tested, wherein the typical operating points include at least one of solar irradiance and temperature.

[0065] The typical operating point may be the electrical characteristics of the photovoltaic module to be tested under standard test conditions and nominal working conditions. The typical operating point under the corresponding solar irradiance and / or temperature may be determined by obtaining typical values ​​of the electrical characteristics of the photovoltaic module to be tested in the past twelve months.

[0066] In a practical application, the historical working data of the photovoltaic module to be tested is collected, where the historical working data includes parameters such as working voltage, working current, power generation, solar irradiance, and temperature. The historical working data is then cleaned to remove abnormal values ​​and incomplete data records to ensure the accuracy and availability of the historical working data. Then, according to the data characteristics of the historical working data, the historical working data is divided into working conditions, where different working conditions can be defined according to the change characteristics of parameters such as power, temperature, and irradiance of the photovoltaic module to be tested to obtain working condition points.

[0067] Step S202 , performing parameter fitting for typical operating points to obtain initial model parameters, wherein the initial model parameters match the photovoltaic module to be tested and the typical operating points.

[0068] Among them, the simulation software can be used to perform parameter fitting on typical operating points. The result of parameter fitting can be expressed by a fitting formula. In one practical application, the result of parameter fitting is a fitting formula of open circuit voltage-current, and in another practical application, the result of parameter fitting is a fitting formula of short circuit current-solar irradiance.

[0069] In some optional embodiments, the initial model parameters include open circuit voltage and short circuit current.

[0070] Among them, open circuit voltage and short circuit current are the most basic electrical performance parameters of photovoltaic modules, which can directly reflect the maximum voltage and current output capacity of photovoltaic modules under certain conditions. By obtaining the open circuit voltage and short circuit current and ensuring that the open circuit voltage and short circuit current are within the specified range, the reliability and stability of the photovoltaic modules to be tested can be improved.

[0071] In some optional implementations, the initial model parameters include at least one of an operating voltage, an operating current, and a maximum power point.

[0072] The working voltage can be obtained through a voltage tester, and the working current can be obtained through a current tester. The maximum power point can be tested through a power tester to determine the maximum power point of the photovoltaic module to be tested, or the photovoltaic module tester can be directly used to measure the current-voltage curve of the photovoltaic module to be tested, thereby determining the maximum power point of the photovoltaic module to be tested.

[0073] Step S203: Based on the fitting result, an electrical parameter model matching the typical operating point is established.

[0074] The electrical parameter model can be determined by establishing an equivalent circuit model of the photovoltaic module to be tested and determining various parameters in the model. The electrical parameter model can be a single diode model or a double diode model. After the electrical parameter model is determined, the data under typical operating points can be used to adjust and optimize the electrical parameter model.

[0075] In some optional implementations, the fitting result is the relationship between the electrical parameters of the photovoltaic module to be tested and the typical operating point.

[0076] By obtaining the relationship between electrical parameters and typical operating points, we can increase our understanding of the electrical parameter model and the relationship between typical operating points, thereby improving the accuracy of the electrical parameter model.

[0077] Step S204, obtaining actual working conditions of the photovoltaic module to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature.

[0078] For details, please see Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0079] Step S205 , determining an electrical parameter model that matches the actual working conditions, wherein the electrical parameter model represents the electrical characteristics of the photovoltaic module to be tested.

[0080] For details, please see Figure 1 Step S102 of the illustrated embodiment will not be described in detail here.

[0081] Step S206 : acquiring initial electrical parameters of the photovoltaic assembly to be tested based on the electrical parameter model, wherein the initial electrical parameters include at least one of an open circuit voltage and a short circuit current.

[0082] For details, please see Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0083] Step S207: determining electrical parameters under the first working condition according to the initial electrical parameters.

[0084] For details, please see Figure 1 Step S104 of the illustrated embodiment will not be described in detail here.

[0085] In some optional embodiments, the first working condition is that the photovoltaic module to be tested is at a target solar irradiance and a target ambient temperature. In a practical application, the first working condition is a solar irradiance of one kilowatt per square meter and an ambient temperature of twenty-five degrees Celsius.

[0086] The method for calculating the electrical parameters of a photovoltaic module provided in this embodiment can quickly obtain the electrical parameters of a photovoltaic module by constructing an electrical parameter model, thereby improving detection efficiency.

[0087] In this embodiment, a device for calculating electrical parameters of a photovoltaic module is also provided, and the device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made are not repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0088] This embodiment provides a photovoltaic module electrical parameter calculation device, such as Figure 3 As shown, including:

[0089] The working condition acquisition module 301 is used to acquire the actual working condition of the photovoltaic module to be tested, wherein the actual working condition includes at least one of solar irradiance and temperature.

[0090] The determination module 302 is used to determine an electrical parameter model that matches the actual working conditions, wherein the electrical parameter model represents the electrical characteristics of the photovoltaic module to be tested.

[0091] The parameter acquisition module 303 is used to acquire initial electrical parameters of the photovoltaic assembly to be tested based on the electrical parameter model, wherein the initial electrical parameters include at least one of an open circuit voltage and a short circuit current.

[0092] The parameter determination module 304 is used to determine the electrical parameters under the first working condition according to the initial electrical parameters.

[0093] In some optional implementations, the electrical parameter calculation device further includes:

[0094] The typical operating point acquisition module is used to acquire at least two typical operating points of the photovoltaic module to be tested, wherein the typical operating points include at least one of solar irradiance and temperature.

[0095] The initial model parameter acquisition module is used to perform parameter fitting for typical operating points to obtain initial model parameters, wherein the initial model parameters match the photovoltaic module to be tested and the typical operating points.

[0096] The model building module is used to build an electrical parameter model that matches the typical operating point based on the fitting results.

[0097] In some optional embodiments, the initial model parameters include open circuit voltage and short circuit current.

[0098] In some optional implementations, the initial model parameters include at least one of an operating voltage, an operating current, and a maximum power point.

[0099] In some optional implementations, the fitting result is the relationship between the electrical parameters of the photovoltaic module to be tested and the typical operating point.

[0100] In some optional embodiments, the photovoltaic component to be tested is a photovoltaic cell.

[0101] In some optional implementations, the first working condition is that the photovoltaic assembly to be tested is at a target solar irradiance and a target ambient temperature.

[0102] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0103] The electrical parameter calculation device of the photovoltaic module in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0104] The embodiment of the present invention also provides a computer device having the above Figure 3 The electrical parameter calculation device of the photovoltaic module is shown.

[0105] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 4 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0106] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0107] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0108] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0109] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0110] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0111] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0112] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0113] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0114] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for calculating electrical parameters of a photovoltaic module, characterized in that: The method comprises: Acquiring actual working conditions of the photovoltaic module to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature; Determining an electrical parameter model that matches the actual working condition, wherein the electrical parameter model characterizes electrical characteristics of the photovoltaic module to be tested; Based on the electrical parameter model, obtaining initial electrical parameters of the photovoltaic assembly to be tested, wherein the initial electrical parameters include at least one of an open circuit voltage and a short circuit current; According to the initial electrical parameters, electrical parameters under a first working condition are determined.

2. The method according to claim 1, characterized in that Before determining the electrical parameter model matching the actual working condition, the method further includes: Acquire at least two typical operating points of the photovoltaic module to be tested, wherein the typical operating points include at least one of solar irradiance and temperature; Performing parameter fitting for the typical operating point to obtain initial model parameters, wherein the initial model parameters match the photovoltaic module to be tested and the typical operating point; Based on the fitting results, an electrical parameter model matching the typical operating point is established.

3. The method according to claim 2, characterized in that The initial model parameters include open circuit voltage and short circuit current.

4. The method according to claim 2, characterized in that: The initial model parameters include at least one of an operating voltage, an operating current and a maximum power point.

5. The method according to any one of claims 2 to 4, characterized in that: The fitting results are the relationship between the electrical parameters of the PV module to be tested and the typical operating points.

6. The method according to any one of claims 1 to 4, characterized in that: The photovoltaic component to be tested is a photovoltaic cell.

7. The method according to claim 1, characterized in that The first working condition is that the photovoltaic module to be tested is at a target solar irradiance and a target ambient temperature.

8. A photovoltaic module electrical parameter calculation device, characterized in that: The device comprises: A working condition acquisition module, used to acquire actual working conditions of the photovoltaic assembly to be tested, wherein the actual working conditions include at least one of solar irradiance and temperature; A determination module, configured to determine an electrical parameter model that matches the actual working condition, wherein the electrical parameter model characterizes electrical characteristics of the photovoltaic assembly to be tested; A parameter acquisition module, configured to acquire initial electrical parameters of the photovoltaic assembly to be tested based on the electrical parameter model, wherein the initial electrical parameters include at least one of an open circuit voltage and a short circuit current; The parameter determination module is used to determine the electrical parameters under the first working condition according to the initial electrical parameters.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for calculating electrical parameters of a photovoltaic component according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for calculating electrical parameters of a photovoltaic component according to any one of claims 1 to 7.

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