Method for automatically generating photovoltaic calculation report

Abstract

The invention relates to a method for automatically generating a photovoltaic calculation report, and belongs to the technical field of photovoltaic design automation, and the method comprises the following operation steps: 1, determining a photovoltaic design scheme and a digital twinborn model; 2, data acquisition is carried out, and in the data acquisition stage, two data sources are provided: the first data is data determined by the design scheme of the photovoltaic project, and the second data is data determined by the design scheme of the photovoltaic project; and the second type of data is different design modes adopted by the photovoltaic engineering. And 3, data processing is carried out, and installed capacity calculation, assembly series number calculation, series-parallel checking calculation and cable calculation are adopted to respectively correspond to different fields of photovoltaic design, but are important and tedious processes for calculation. And 4, carrying out data conversion, clicking to export a calculation report, and storing an md file on a desktop. By realizing automatic calculation and generation of the photovoltaic calculation report, the time required by calculation in the photovoltaic design process is reduced, the working difficulty is reduced, the workload is reduced, and the efficiency of the whole photovoltaic power station design process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic design automation, and in particular to a method for automatically generating a photovoltaic calculation report. Background Art

[0002] With the rapid development of the photovoltaic industry, the demand for intelligent photovoltaic design is constantly upgrading. All stages of the photovoltaic industry are relying on rapidly developing information networks, digital models, big data and other high-tech modern information technologies to achieve varying degrees of automation, informatization and intelligent development.

[0003] As an important process and output document in the photovoltaic design process, photovoltaic design calculation reports play an important role in ensuring the safe operation of photovoltaic systems, optimizing designs, improving equipment performance, predicting future energy demand, and improving energy accessibility. However, the complex calculation formulas and numerous mathematical symbols in photovoltaic calculation reports make it difficult for many software to achieve the overall automatic creation and complete expression of photovoltaic calculation reports.

[0004] Markdown‌ is a lightweight markup language that allows people to write documents in an easy-to-read and easy-to-write plain text format, and then convert them into valid HTML documents. Markdown has simple syntax rules, including the formatting of basic elements such as titles, paragraphs, lists, links, and pictures. By simply typing a few characters, you can quickly define the style of the document. This language absorbs many of the features of plain text tags already in emails, and supports pictures, charts, and mathematical formulas. Because of its simplicity, efficiency, cross-platform compatibility, strong scalability, and flexible format conversion, it has become a widely used markup language in many websites and applications. Therefore, Markdown can also provide a convenient and efficient solution for the automation of photovoltaic power station calculation reports.

[0005] In the current photovoltaic design field, there is no method or software for automatically generating photovoltaic calculation reports. Photovoltaic calculation reports still follow the traditional method of manual production after calculation, which is not only uneconomical and inefficient, but also prone to errors, causing unnecessary losses. The field of automatic generation of photovoltaic calculation reports is still blank. The emergence of this patent fills this gap, is the beginning of the automation of photovoltaic design calculation reports, and is an important link in realizing the informatization of photovoltaic design.

[0006] In the current photovoltaic system design field, the preparation of photovoltaic calculation reports mainly relies on manually calculating the various parameters of photovoltaic components, and then carefully calculating according to the formula. After careful calculation, it is necessary to manually format the photovoltaic calculation report and input the overall calculation formula, and present the final results to all parties involved in the project in written form. In this way, a detailed calculation report can be prepared for a specific project, but in the entire photovoltaic design system, it is difficult to generate reports with complex calculation formula styles, dynamic pictures, and reports for different situations. Therefore, only simple and very irregular text formats are used to replace complex mathematical formulas, which also leads to the fact that there is currently no unified report format and report content.

[0007] On the other hand, in the photovoltaic calculation process, the overall calculation process is very complicated. Each calculation formula involves many variables, different design reference constants, and calculation parameters according to different equipment models. In addition, the parameters before and after the overall calculation process affect each other, and the data is closely related. Once some parameters are changed, the entire process needs to be recalculated. Therefore, the calculation process is very cumbersome and error-prone, and manual calculation is very inconvenient. For computer automation, there is no such error-prone problem, so it is imperative to introduce computers for automated calculations. However, there is no perfect system in the field of photovoltaic design that can automatically calculate and generate photovoltaic calculation reports. Summary of the invention

[0008] The present invention mainly solves the deficiencies existing in the prior art and provides a method for automatically generating a photovoltaic calculation report. By realizing the automatic calculation and generation of the photovoltaic calculation report, the time required for calculation in the photovoltaic design process is reduced, the work difficulty is reduced, the workload is reduced, and the efficiency of the entire photovoltaic power station design process is improved.

[0009] The above technical problems of the present invention are mainly solved by the following technical solutions: A method for automatically generating a photovoltaic calculation report includes the following steps: Step 1: Create a digital twin model for the photovoltaic project through PVDT. After design optimization through simulation, determine the final photovoltaic design plan and the corresponding digital twin model.

[0010] The second step is to acquire data. In the data acquisition stage, there are two sources of data to be acquired: the first type of data is the data determined by the design plan of this photovoltaic project; the second type of data is the data obtained due to the different design methods adopted in this photovoltaic project; in the PVDT interface, enter the necessary calculation constants, equipment models, and engineering data according to the design files.

[0011] Step 3: Process the data, click the calculation button on the PVDT interface to generate the calculation results; use installed capacity calculation, component series number calculation, series-parallel verification, and cable calculation to calculate the important and tedious processes corresponding to different areas of photovoltaic design.

[0012] Step 4: Perform data conversion, click Export Calculation Report, and save the md file on the desktop.

[0013] Step 5: Use Typora to open the md file and convert it into pdf format. The photovoltaic calculation report is automatically generated.

[0014] PVDT is a photovoltaic power station design system based on the digital twin model. PVDT is an existing technology. The digital twin system of the smart photovoltaic power station uses the Internet of Things technology to monitor the equipment and environment in real time, and displays the operation of the power station through a three-dimensional visualization system, realizing remote monitoring, automatic inspection and preventive maintenance, reducing costs, and improving operation and maintenance efficiency and decision-making quality. PVDT is used as a platform to realize the method of automatically generating photovoltaic calculation reports.

[0015] The digital twin system of the smart photovoltaic power station deploys sensors to monitor photovoltaic cell arrays, junction boxes, low-voltage DC cabinets, inverter cabinets, AC low-voltage cabinets, step-up transformers and other equipment, as well as environmental conditions in real time, and issues real-time alarms for abnormal situations to ensure the safe operation of the power station and meet the daily operations of power station operators and the monitoring needs of superior systems or dispatchers. At the same time, it uses big data technology to conduct statistical analysis of power station data and monitor the current situation and future trends of power station data indicators.

[0016] As a preference, the number of photovoltaic components in the engineering design, the electronic components used in the engineering design, and the electrical properties such as power, current, and voltage carried by the components, all of which have been carried in the digital model’s own internal properties when the PVDT creates a digital twin model. The digital twin model, as the basis of the PVDT system, directly interacts with the PVDT with the data information it carries. Therefore, the PVDT automatically obtains the corresponding data information through the digital twin model.

[0017] Preferably, the supporting method and structure of the lower bracket of the photovoltaic panel needs to be adjusted according to the photovoltaic design specifications, and the corresponding constants in the calculation formula need to be adjusted. This part of the data is manually input in the software interface through the reserved input column of the PVDT calculation interface.

[0018] Preferably, after determining the type of photovoltaic modules, the inverter model, and the capacity ratio of the module capacity and the inverter capacity of the photovoltaic power station, the power of the photovoltaic modules or the number of photovoltaic modules is determined; the calculation process is as follows: Calculation parameters: : Transformer rated power; : Photovoltaic module power; : Number of photovoltaic modules; ① Calculate the number of blocks by power: ; ② Calculate power by number of blocks: .

[0019] As a preferred method, the module for calculating the number of components in series mainly calculates the lowest working temperature t of the components, the highest working temperature t' of the components, the number of components in series N, the lowest voltage Vmin of the string, and the highest voltage Vmax of the string. There are many calculation parameters, and the calculation is prone to errors. Automatic calculation is more convenient and faster. The calculation process is as follows: PV panel parameters: Open circuit voltage (V); Open circuit voltage coefficient; Peak power voltage (V); Peak voltage coefficient; Battery operating temperature (℃); : Component working limit low temperature (℃); : Component working maximum high temperature (℃); : Minimum number of components connected in series; : Maximum number of components connected in series; : Minimum string voltage (V); : Maximum string voltage (V); Inverter parameters: : Maximum DC input voltage (V); : Minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage (V); Environmental parameters: : Historical extremely low temperature (℃); : Historical extremely low temperature (℃); Calculation of the maximum operating temperature of the component: t': ; Calculation of the lowest operating temperature of the component: t: ; Number of components connected in series: Calculation of the value range of N: ; Calculation of the minimum voltage (Vmin) of the string: ; Calculation of the maximum voltage (Vmax) of the string: .

[0020] As a preference, the series-parallel verification module determines the optimal series and parallel configuration of solar panels by verifying the capacity ratio, inverter voltage, and inverter current to ensure the maximum efficiency and reliability of the photovoltaic system; the calculation process is as follows: Calculation parameters: PV panel power (W); : Open circuit voltage of photovoltaic module (V); : PV module short-circuit current (A); : Inverter power (W); : Maximum input current of the inverter (A); : Inverter minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage of the inverter (V); : Number of components connected in series; : Number of parallel strings; Ratio verification: The power ratio between the inverter and the connected PV panels is 1:1. In the case of over-ratio, the capacity ratio shall not exceed 1.3: ; Inverter voltage verification: The battery array voltage is between the inverter minimum full-load MPPT voltage and the maximum full-load MPPT voltage: ; Inverter current verification: The maximum output current of the battery module array shall not be greater than the maximum input current of the inverter; .

[0021] As a preferred embodiment, in the cable calculation module, the data of the allowable voltage reduction △U of the DC cable, the DC cable length L, the allowable voltage reduction △U' of the AC cable, the maximum output power Wp of the inverter, and the AC cable length L' are calculated to realize the cable calculation of the photovoltaic design; the calculation process is as follows: Calculation parameters: Ambient temperature (℃); : Copper conductor resistivity ; : Cable cross-sectional area ; : Allowable voltage drop (V); : Pressure drop rate; : Maximum power operating voltage of the component (V); : Maximum power operating current of the component (A); : Component power factor; : Maximum output power of the inverter (W); : Inverter output voltage (V); Calculation of allowable voltage drop △U of DC cable: ; Calculation of DC cable length L: ; Calculation of allowable voltage drop △U' of AC cable: ; Calculation of the maximum output power Wp of the inverter: ; Calculation of AC cable length L': .

[0022] Preferably, after the steps of data processing, text generation, calculation formula selection, and calculation formula arrangement generation of the overall photovoltaic calculation book are performed through the Markdown language, an md format file of the photovoltaic calculation book is generated, and the file format is converted through the Markdown toolbox Typora, and generated in multiple formats such as "doc", "pdf", and "txt". The generated electronic file is convenient for storage, transmission, and printing.

[0023] The present invention can achieve the following effects: The present invention provides a method for automatically generating a photovoltaic calculation report. Compared with the prior art, the method uses Markdown language as a tool. After inputting necessary project geographic location information, project design equipment electrical parameter information and other data, the photovoltaic power station design calculation is automatically performed, and a photovoltaic design written calculation report that complies with photovoltaic design specifications and conventional mathematical expressions is generated, which is used to show the photovoltaic calculation process to the industry and the outside world. By realizing the automatic calculation and generation of photovoltaic calculation reports, the time required for calculation in the photovoltaic design process is reduced, the difficulty of work is reduced, the workload is reduced, and the efficiency of the entire photovoltaic power station design process is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the data processing flow of the present invention.

[0025] Figure 2 It is a schematic diagram of the process of using PVDT to automatically generate a photovoltaic calculation book according to the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0027] Example 1: Figure 1 and Figure 2 , the method for automatically generating a photovoltaic calculation report includes the following steps: Step 1: Create a digital twin model for the photovoltaic project through PVDT. After design optimization through simulation, determine the final photovoltaic design plan and the corresponding digital twin model.

[0028] Step 2: Data acquisition. Enter the necessary calculation constants, equipment models, and engineering data in the PVDT interface according to the design documents. In the data acquisition stage, there are two sources of data to be acquired: the first type of data is the data determined by the design scheme of this photovoltaic project, the number of photovoltaic components designed for the project, the electronic components used in the design of this project, and the power, current, voltage and other electrical properties it carries. When PVDT creates a digital twin model, these data have been used as a carrier and are all carried in the internal properties of the digital model itself. As the basis of the PVDT system, the digital twin model carries data information that directly interacts with the PVDT. Therefore, this part of the data is automatically acquired by PVDT through the digital twin model. The second type of data is the support method and structure of the lower bracket of the photovoltaic panel due to the different design methods adopted in this photovoltaic project. According to the photovoltaic design specifications, the corresponding constants in the calculation formula need to be adjusted. This part of the data is manually entered in the software interface by the reserved input column of the PVDT calculation interface.

[0029] Step 3: Process the data, click the calculation button on the PVDT interface to generate the calculation results; use installed capacity calculation, component series number calculation, series-parallel verification, and cable calculation to calculate the important and tedious processes corresponding to different areas of photovoltaic design.

[0030] Installed capacity, or installed power generation capacity, refers to the capacity of power generation equipment that has been formally installed and put into use, and is usually calculated in kilowatts (KW). In the photovoltaic field, the determination of installed capacity is based on a comprehensive consideration of factors such as the assessment of solar energy resources, site conditions, and expected power demand. After determining the type of photovoltaic modules, inverter model, and the capacity ratio of the photovoltaic power station's module capacity to the inverter capacity, it is used to determine the power of the photovoltaic modules or the number of photovoltaic modules; the calculation process is as follows: Calculation parameters: : Transformer rated power; : Photovoltaic module power; : Number of photovoltaic modules; ① Calculate the number of blocks by power: ; ② Calculate power by number of blocks: .

[0031] The number of modules in series is an important factor affecting the overall voltage, power generation and overall performance of the photovoltaic power station design system. There are many complex factors to consider when designing the optimal number of modules in series and parallel, including environmental factors: temperature and sunshine, lighting conditions: photovoltaic module electrical parameters, inverter parameters, etc.

[0032] The main calculation results of the module for calculating the number of components in series are the lowest working temperature t of the components, the highest working temperature t' of the components, the number of components in series N, the lowest voltage Vmin of the string, and the highest voltage Vmax of the string. There are many calculation parameters, and it is easy to make mistakes in the calculation. Automatic calculation is more convenient and faster. The calculation process is as follows: PV panel parameters: Open circuit voltage (V); Open circuit voltage coefficient; Peak power voltage (V); Peak voltage coefficient; Battery operating temperature (℃); : Component working limit low temperature (℃); : Component working maximum high temperature (℃); : Minimum number of components connected in series; : Maximum number of components connected in series; : Minimum string voltage (V); : Maximum string voltage (V); Inverter parameters: : Maximum DC input voltage (V); : Minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage (V); Environmental parameters: : Historical extremely low temperature (℃); : Historical extremely low temperature (℃); Calculation of the maximum operating temperature of the component: t': ; Calculation of the lowest operating temperature of the component: t: ; Components in series: N value range calculation: ; Calculation of the minimum voltage (Vmin) of the string: ; Calculation of the maximum voltage (Vmax) of the string: .

[0033] The photovoltaic design series and parallel verification is mainly to verify the series and parallel configuration of solar panels in the photovoltaic system through calculation, so as to ensure the safety performance of photovoltaic power generation, optimize the performance of the power generation system and meet specific needs. The series and parallel verification module determines the optimal series and parallel configuration of solar panels by verifying the capacity ratio, inverter voltage and inverter current to ensure the maximum efficiency and reliability of the photovoltaic system; the calculation process is as follows: Calculation parameters: PV panel power (W); : Open circuit voltage of photovoltaic module (V); : PV module short-circuit current (A); : Inverter power (W); : Maximum input current of the inverter (A); : Inverter minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage of the inverter (V); : Number of components connected in series; : Number of parallel strings; Ratio verification: The power ratio between the inverter and the connected PV panels is 1:1. In the case of over-ratio, the capacity ratio shall not exceed 1.3: ; Inverter voltage verification: The battery array voltage is between the inverter minimum full-load MPPT voltage and the maximum full-load MPPT voltage: ; Inverter current verification: The maximum output current of the battery module array shall not be greater than the maximum input current of the inverter; .

[0034] The photovoltaic design cable calculation is to calculate the selection and length of photovoltaic cables to meet the requirements of allowable temperature rise, voltage loss, mechanical strength, etc., to ensure that the performance of the cable matches the requirements of the photovoltaic system, and to ensure the safe, stable and efficient operation of the system. In the cable calculation module, the data of the allowable voltage reduction △U of the DC cable, the DC cable length L, the allowable voltage reduction △U' of the AC cable, the maximum output power Wp of the inverter, and the AC cable length L' are calculated to realize the cable calculation of photovoltaic design; the calculation process is as follows: Calculation parameters: Ambient temperature (℃); : Copper conductor resistivity ; : Cable cross-sectional area ; : Allowable voltage drop (V); : Pressure drop rate; : Maximum power operating voltage of the component (V); : Maximum power operating current of the component (A); : Component power factor; : Maximum output power of the inverter (W); : Inverter output voltage (V); Calculation of allowable voltage drop △U of DC cable: ; Calculation of DC cable length L: ; Calculation of allowable voltage drop △U' of AC cable: ; Calculation of the maximum output power Wp of the inverter: ; Calculation of AC cable length L': .

[0035] Step 4: Perform data conversion, click Export Calculation Report, and save the md file on the desktop. After using the Markdown language to process the data of the overall photovoltaic calculation book, generate text, select calculation formulas, and generate the arrangement of calculation formulas, the md format file of the photovoltaic calculation book is generated. The file format is converted through the Markdown toolbox Typora, and generated in multiple formats such as "doc", "pdf", and "txt". The generated electronic files are convenient for storage, transmission, and printing.

[0036] Step 5: Use Typora to open the md file and convert it into pdf format. The photovoltaic calculation report is automatically generated.

[0037] The photovoltaic calculation book, which has complicated data calculation formulas, special mathematical symbols, and high formula display requirements (to better conform to the expression form of conventional mathematical formulas, for example, X squared cannot be written as X^2), cannot be generated through programming, and conventional file formats such as word can only be manually edited in the formula interface of the software and then inserted into the doc file. It is not possible to directly generate a .doc file with the required photovoltaic calculation formula through code. Through various attempts and writing work, only the Markdown language has well realized the function of automatically generating photovoltaic calculation books.

[0038] A written calculation report with a standard format and neat arrangement, including but not limited to PDF, Doc, TXT, etc. A set of written formats for photovoltaic design calculation reports has been compiled, and the generated photovoltaic calculation report has the characteristics of complete logic, comprehensive content, reasonable format, and beautiful arrangement, including project description, construction units, calculation content, calculation process and formula, parameter description and other complete contents.

[0039] In summary, the method for automatically generating photovoltaic calculation reports uses Markdown language as a tool. After inputting necessary project geographic location information, project design equipment electrical parameter information and other data, the photovoltaic power station design calculation is automatically performed, and a photovoltaic design written calculation report that complies with photovoltaic design specifications and conventional mathematical expressions is generated, which is used to show the photovoltaic calculation process to the industry and beyond. By realizing the automatic calculation and generation of photovoltaic calculation reports, the time required for calculations in the photovoltaic design process is reduced, the difficulty of work is reduced, the workload is reduced, and the efficiency of the entire photovoltaic power station design process is improved.

[0040] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A method for automatically generating a photovoltaic calculation report, characterized in that The steps are as follows: Step 1: Create a digital twin model of the photovoltaic project through PVDT. After design optimization through simulation, determine the final photovoltaic design plan and the corresponding digital twin model. Step 2: Data acquisition. In the data acquisition stage, there are two sources of data to be acquired: the first type of data is the data determined by the design scheme of this photovoltaic project; the second type of data is the data obtained by this photovoltaic project due to different design methods; in the PVDT interface, enter the necessary calculation constants, equipment models, and engineering data according to the design file; Step 3: Process the data and click the calculation button on the PVDT interface to generate the calculation results. The calculations are carried out using the installed capacity calculation, the number of components in series calculation, the series-parallel verification calculation, and the cable calculation, which are important and tedious processes corresponding to different areas of photovoltaic design. Step 4: Perform data conversion, click Export Calculation Report, and save the md file on the desktop; Step 5: Use Typora to open the md file and convert it into pdf format. The photovoltaic calculation report is automatically generated.

2. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: The number of photovoltaic components designed for the project, the electronic components used in the project design, and the electrical properties such as power, current, and voltage they carry. When PVDT creates a digital twin model, the digital model is used as a carrier and all of these data are carried in the internal properties of the digital model itself. As the basis of the PVDT system, the digital twin model directly interacts with the PVDT with its own data information. Therefore, the PVDT automatically obtains the corresponding data information through the digital twin model.

3. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: The supporting method and structure of the lower bracket of the photovoltaic panel need to be adjusted according to the photovoltaic design specifications, and the corresponding constants in the calculation formula need to be adjusted. This part of the data is manually input in the software interface through the reserved input column of the PVDT calculation interface.

4. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: After determining the PV module type, inverter model, and the capacity ratio of the PV power station module capacity to the inverter capacity, it is used to determine the PV module power or the number of PV module blocks; the calculation process is as follows: Calculation parameters: : Transformer rated power; : Photovoltaic module power; : Number of photovoltaic modules; ① Calculate the number of blocks by power: ; ② Calculate power by number of blocks: .

5. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: The main calculation results of the module for calculating the number of components in series are the lowest working temperature t of the components, the highest working temperature t' of the components, the number of components in series N, the lowest voltage Vmin of the string, and the highest voltage Vmax of the string. There are many calculation parameters, and it is easy to make mistakes in the calculation. Automatic calculation is more convenient and faster. The calculation process is as follows: Photovoltaic module parameters: Open circuit voltage (V); Open circuit voltage coefficient; Peak power voltage (V); Peak voltage coefficient; Battery operating temperature (℃); : Component working limit low temperature (℃); : Component working maximum high temperature (℃); : Minimum number of components connected in series; : Maximum number of components connected in series; : Minimum string voltage (V); : Maximum string voltage (V); Inverter parameters: : Maximum DC input voltage (V); : Minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage (V); Environmental parameters: : Historical extremely low temperature (℃); : Historical extremely low temperature (℃); Calculation of the maximum operating temperature of the component: t': ; Calculation of the lowest operating temperature of the component: t: ; Components in series: N value range calculation: ； Calculation of the minimum voltage (Vmin) of the string: ； Calculation of the maximum voltage (Vmax) of the string: 。 6. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: The series-parallel verification module determines the optimal series and parallel configuration of solar panels by verifying the capacity ratio, inverter voltage, and inverter current to ensure the maximum efficiency and reliability of the photovoltaic system; the calculation process is as follows: Calculation parameters: PV panel power (W); : Open circuit voltage of photovoltaic module (V); : PV module short-circuit current (A); : Inverter power (W); : Maximum input current of the inverter (A); : Inverter minimum full-load MPPT voltage (V); : Maximum full-load MPPT voltage of the inverter (V); : Number of components connected in series; : Number of parallel strings; Capacity ratio verification: The power ratio between the inverter and the connected PV panels is 1:

1. In the case of over-capacity, the capacity ratio shall not exceed 1.3: ； Inverter voltage verification: The battery array voltage is between the inverter minimum full-load MPPT voltage and the maximum full-load MPPT voltage: ； Inverter current verification: The maximum output current of the battery module array shall not be greater than the maximum input current of the inverter; 。 7. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: In the cable calculation module, the data of the allowable voltage reduction △U of the DC cable, the DC cable length L, the allowable voltage reduction △U' of the AC cable, the maximum output power Wp of the inverter, and the AC cable length L' are calculated to realize the cable calculation of the photovoltaic design; the calculation process is as follows: Calculation parameters: Ambient temperature (℃); : Copper conductor resistivity ; : Cable cross-sectional area ; : Allowable voltage drop (V); : Pressure drop rate; : Maximum power operating voltage of the component (V); : Maximum power operating current of the component (A); : Component power factor; : Maximum output power of the inverter (W); : Inverter output voltage (V); Calculation of allowable voltage drop △U of DC cable: ; Calculation of DC cable length L: ; Calculation of allowable voltage drop △U' of AC cable: ; Calculation of the maximum output power Wp of the inverter: ; Calculation of AC cable length L': .

8. The method for automatically generating a photovoltaic calculation report according to claim 1, characterized in that: After using the Markdown language to process the data of the overall photovoltaic calculation book, generate text, select calculation formulas, and arrange and generate calculation formulas, an md format file of the photovoltaic calculation book is generated. The file format is converted through the Markdown toolbox Typora and generated in multiple formats such as "doc", "pdf", and "txt". The generated electronic files are convenient for storage, transmission, and printing.

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