Calculation method and device for solar radiation power generation index

Abstract

The invention belongs to the technical field of photovoltaic power generation measurement, and discloses a solar radiation power generation index calculation method and device, and the method comprises the steps: obtaining the information of a target power station; the target power station information comprises longitude and latitude information of a target power station, a photovoltaic module installation angle, an installed capacity, an attenuation rate, production time and calculation version information; acquiring internal radiation quantity, meteorological radiation quantity and daily power generation quantity of the target power station according to the target power station information; calculating accumulated attenuation data of the target power station according to the attenuation rate and the production time; calculating the daily radiation quantity of the target power station based on the daily generating capacity and the accumulated attenuation data; and obtaining a power generation index based on the internal radiation quantity, the meteorological radiation quantity and the daily radiation quantity. According to the invention, the power generation performance of the photovoltaic power station can be comprehensively and accurately evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation measurement, and in particular to a method and device for calculating a solar radiation power generation index. Background Art

[0002] As the world relies more on renewable energy, photovoltaic power generation, as one of the main forms of solar energy utilization, has attracted widespread attention for its power generation efficiency and reliability. Although there are some systems for evaluating the power generation performance of photovoltaic power stations, these systems mainly rely on real-time monitoring and data analysis of photovoltaic power stations, and most of them only focus on the internal operation data of the power station (such as power generation), lacking comprehensive consideration of external environmental factors (such as solar radiation).

[0003] Although there are some third-party organizations that release solar radiation data that provide a certain reference for power generation forecasts, these data are usually based on remote calculations by third-party organizations based on the geography and meteorology of the photovoltaic power station. They are difficult to accurately reflect the actual solar radiation power generation of a specific photovoltaic power station, resulting in incomplete and inaccurate evaluation results. Summary of the invention

[0004] The present application provides a method and device for calculating the solar radiation power generation index, which can comprehensively and accurately evaluate the power generation performance of a photovoltaic power station and provide a reliable data source for the daily operation and management of the photovoltaic power station.

[0005] In a first aspect, an embodiment of the present application provides a method for calculating a solar radiation power generation index, comprising: Obtain target power station information; target power station information includes latitude and longitude information of the target power station, photovoltaic module installation angle, installed capacity, attenuation rate, commissioning time and calculation version information; Collect the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information; Calculate the cumulative decay data of the target power station based on the decay rate and commissioning time; Calculate the daily radiation of the target power station based on the daily power generation and accumulated attenuation data; The power generation index is obtained based on the internal radiation, meteorological radiation and daily radiation.

[0006] Furthermore, the above-mentioned calculation of the cumulative attenuation data of the target power station based on the attenuation rate and the commissioning time includes: Determine the commissioning years of the target power plant based on the commissioning time; Subtract 1 from the number of years of operation and multiply it by the annual decay rate minus the decay rate of the first year to get the remaining annual decay rate. Add the first year decay rate and the remaining year decay rate to get the cumulative decay data.

[0007] Furthermore, the above calculation of the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data includes: Obtain the acceptance loss value of the target power station; Subtract the accumulated attenuation data from 1 to get the component effectiveness; Multiply the component efficiency, installed capacity and acceptance loss value to get the actual power generation; Divide the daily power generation by the actual power generation to get the daily radiation.

[0008] Furthermore, the power generation index based on the internal radiation, meteorological radiation and daily radiation includes: If the internal radiation is 0, when the daily power generation is 0, the meteorological radiation is used as the power generation index; when the daily power generation is not 0, the daily radiation is compared with the preset threshold to obtain the power generation index; If the internal radiation amount is not 0, the internal radiation amount is compared with a preset threshold to obtain a power generation index.

[0009] Furthermore, the above-mentioned comparison of the internal radiation amount and the preset threshold value to obtain the power generation index includes: Determine whether the internal radiation level is greater than a preset threshold; If so, the daily radiation is compared with the preset threshold to obtain the power generation index; If not, when the daily power generation is 0, the power generation index is obtained by the first judgment method; when the daily power generation is not 0, the power generation index is obtained by the second judgment method.

[0010] Furthermore, the above comparison of daily radiation and a preset threshold value to obtain a power generation index includes: If the daily radiation is greater than the preset threshold, the meteorological radiation is used as the power generation index; If the daily radiation is less than or equal to the preset threshold, the difference between the meteorological radiation and the daily radiation is calculated; If the difference is greater than the preset deviation, the meteorological radiation is used as the power generation index; If the difference is less than or equal to the preset deviation, the daily radiation is used as the power generation index.

[0011] Furthermore, the above-mentioned first determination method is used to obtain the power generation index, including: Calculate the difference between meteorological radiation and internal radiation; If the difference is greater than the preset deviation, the meteorological radiation is used as the power generation index; If the difference is less than or equal to the preset deviation, the internal radiation is used as the power generation index.

[0012] Furthermore, the second determination method is used to obtain the power generation index, including: Calculate the difference between internal radiation and daily radiation; If the difference is greater than the preset deviation, the power generation index is obtained by using the third judgment method; If the difference is less than or equal to the preset deviation, the internal radiation is used as the power generation index.

[0013] Furthermore, the third determination method is used to obtain the power generation index, including: Calculating the first difference between meteorological radiation and internal radiation; Calculate the second difference between the meteorological radiation and the daily radiation; If the first difference is greater than the second difference, the daily radiation is used as the power generation index; If the first difference is less than or equal to the second difference, the internal radiation amount is used as the power generation index.

[0014] In a second aspect, an embodiment of the present application provides a device for calculating a solar radiation power generation index, comprising: The acquisition module is used to obtain the target power station information; the target power station information includes the latitude and longitude information of the target power station, the installation angle of the photovoltaic modules, the installed capacity, the attenuation rate, the commissioning time and the calculation version information; A collection module, used to collect the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information; The decay module is used to calculate the cumulative decay data of the target power station according to the decay rate and commissioning time; The back calculation module is used to calculate the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data; The calculation module is used to obtain the power generation index based on the internal radiation, meteorological radiation and daily radiation.

[0015] Furthermore, the above-mentioned attenuation module is specifically used to determine the number of years of operation of the target power station according to the commissioning time; subtract 1 from the number of years of operation and multiply it by the annual attenuation rate minus the first year's attenuation rate to obtain the remaining annual attenuation rate; add the first year's attenuation rate and the remaining annual attenuation rate to obtain the cumulative attenuation data.

[0016] Furthermore, the above-mentioned inverse calculation module is specifically used to obtain the acceptance loss value of the target power station; subtract the accumulated attenuation data from 1 to obtain the component efficiency; multiply the component efficiency, installed capacity and acceptance loss value to obtain the actual power generation; divide the daily power generation by the actual power generation to obtain the daily radiation.

[0017] Furthermore, the above-mentioned calculation module is specifically used to use the meteorological radiation as the power generation index when the internal radiation is 0, if the daily power generation is 0; if the daily power generation is not 0, compare the daily radiation with the preset threshold to obtain the power generation index; when the internal radiation is not 0, compare the internal radiation with the preset threshold to obtain the power generation index.

[0018] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a method for calculating a solar radiation power generation index as in any of the above embodiments are performed.

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for calculating a solar radiation power generation index as in any of the above embodiments.

[0020] In summary, compared with the prior art, the technical solution provided in the embodiment of the present application has at least the following beneficial effects: A method for calculating a solar radiation power generation index provided in an embodiment of the present application collects the daily power generation, internal radiation and meteorological radiation of a target power station, and reversely calculates the daily radiation of the target power station based on power station information such as attenuation rate and commissioning time. Finally, the final solar radiation power generation index is determined based on the internal radiation of the power station irradiator, the daily radiation calculated based on a variety of data and the meteorological radiation of a third-party agency. This achieves a comprehensive and accurate evaluation of the power generation performance of a photovoltaic power station and provides a reliable data source for daily operation and management of the photovoltaic power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flow chart of a method for calculating a solar radiation power generation index provided as an exemplary embodiment of the present application.

[0022] Figure 2 A structural diagram of a solar radiation power generation index calculation device provided as an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0024] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0025] See also Figure 1 , the embodiment of the present application provides a method for calculating the solar radiation power generation index, including: Step S1, obtaining target power station information; the target power station information includes the latitude and longitude information of the target power station, the installation angle of the photovoltaic modules, the installed capacity, the attenuation rate, the commissioning time and the calculation version information.

[0026] The calculation version information refers to different versions of the calculation process that can be added or subtracted set by the photovoltaic power station management system. The management system supports multiple versions to be applied to different power stations at the same time. To avoid data confusion and ensure the traceability of calculations, the management system will record the calculation version information used to generate each power generation index.

[0027] Step S2, collecting the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information.

[0028] Among them, the internal radiation is the data collected by the irradiator of the target power station, and the meteorological radiation is the data collected by an external third-party organization; the internal radiation, meteorological radiation and daily power generation are all the data of the target power station on that day to ensure real-time performance.

[0029] Specifically, after collecting the internal radiation, meteorological radiation and daily power generation data, the collected data are cleaned, such as removing outliers and missing values, to form a unified and complete data set, providing a basis for subsequent analysis.

[0030] Step S3, calculating the cumulative attenuation data of the target power station according to the attenuation rate and the commissioning time.

[0031] Specifically, first determine the number of years of operation N of the target power station according to the commissioning time (N is rounded up to an integer, such as 1 for less than 1 year and 4 for 3.2 years); subtract 1 from the number of years of operation and multiply it by the annual attenuation rate minus the first year attenuation rate to obtain the remaining annual attenuation rate; add the first year attenuation rate and the remaining year attenuation rate to obtain the cumulative attenuation data. The specific calculation formula is: Cumulative attenuation data = first year attenuation rate + subsequent year attenuation rate * (N-1).

[0032] Step S4, calculating the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data.

[0033] Specifically, first obtain the acceptance loss value (also called acceptance PR value) of the target power station; subtract the accumulated attenuation data from 1 to obtain the component efficiency; multiply the component efficiency, installed capacity and acceptance loss value to obtain the actual power generation; divide the daily power generation by the actual power generation to obtain the daily radiation. The specific calculation formula is: Daily radiation = daily power generation / (installed capacity*acceptance loss value*(1-accumulated attenuation data)).

[0034] Among them, the acceptance loss value integrates the losses of various components of the target power station, such as the efficiency reduction caused by dust and rain, the efficiency reduction caused by temperature, the power loss of the grid-connected inverter, the power loss of the transformer, the efficiency reduction caused by the mismatch of the series and parallel connection of the components, the power loss of the AC and DC cables, etc. It is a product value of related influencing factors, and is currently generally between 76% and 85%. (1-accumulated attenuation data) is the current component power conversion efficiency, referred to as the component efficiency.

[0035] Step S5, obtaining a power generation index based on the internal radiation, meteorological radiation and daily radiation.

[0036] The above embodiment provides a method for calculating the solar radiation power generation index, which collects the daily power generation, internal radiation and meteorological radiation of the target power station, and combines the power station information such as attenuation rate and commissioning time to reversely calculate the daily radiation of the target power station. Finally, the final solar radiation power generation index is determined by combining the internal radiation of the power station irradiator, the daily radiation calculated based on multiple data and the meteorological radiation of the third-party agency, thereby achieving a comprehensive and accurate evaluation of the power generation performance of the photovoltaic power station and providing a reliable data source for the daily operation and management of the photovoltaic power station.

[0037] In some embodiments, the power generation index is obtained based on the internal radiation, meteorological radiation and daily radiation, including: Step S51, if the internal radiation is 0, when the daily power generation is 0, the meteorological radiation is used as the power generation index; when the daily power generation is not 0, the daily radiation is compared with the preset threshold to obtain the power generation index.

[0038] Specifically, if the internal radiation is 0, it means that the internal radiation is invalid and cannot be used as a reference indicator. It is necessary to further determine whether the daily power generation is valid. If the daily power generation is 0, it means that the daily power generation is also invalid, and the daily radiation calculated based on the daily power generation is also invalid. Therefore, the meteorological radiation of the external third-party agency is directly used as the power generation index.

[0039] However, if the daily power generation is not 0, that is, the daily power generation is valid, then the daily radiation calculated based on the daily power generation is also valid. Then, the power generation index is obtained by comparing the daily radiation with the preset threshold.

[0040] Step S52: if the internal radiation amount is not 0, compare the internal radiation amount with a preset threshold to obtain a power generation index.

[0041] Specifically, the above-mentioned comparison of the internal radiation amount and the preset threshold value to obtain the power generation index includes: Step S521, determining whether the internal radiation amount is greater than a preset threshold.

[0042] The preset threshold is a reasonable value for the radiation calculated from the power generation. If the internal radiation is greater than the preset threshold, it means that the internal radiation is unreliable, and the power generation index is determined based on the daily radiation after it is removed.

[0043] Step S522: If yes, compare the daily radiation with the preset threshold to obtain the power generation index.

[0044] Specifically, the above comparison of daily radiation and a preset threshold value to obtain a power generation index includes: Step S5211, if the daily radiation is greater than a preset threshold, the meteorological radiation is used as a power generation index.

[0045] Step S5212: If the daily radiation is less than or equal to the preset threshold, the difference between the meteorological radiation and the daily radiation is calculated.

[0046] It is worth noting that the difference here is the absolute value of the difference between the two radiation amounts.

[0047] Step S5213: If the difference is greater than the preset deviation, the meteorological radiation is used as the power generation index.

[0048] Step S5214: If the difference is less than or equal to the preset deviation, the daily radiation is used as the power generation index.

[0049] It is worth noting that in step S51, the operation of comparing the daily radiation and the preset threshold to obtain the power generation index is the same as steps S5211-S5214 here. In the above steps, if the daily radiation is greater than the preset threshold, it means that the daily radiation is unreliable, if the daily radiation is less than or equal to the preset threshold, it means that the daily radiation is reliable, and the difference between the meteorological radiation and the daily radiation is further calculated. If the difference is greater than the preset deviation, it means that the daily radiation is unreliable, otherwise the daily radiation is reliable.

[0050] Step S523: if not, when the daily power generation is 0, the power generation index is obtained by the first judgment method; when the daily power generation is not 0, the power generation index is obtained by the second judgment method.

[0051] Among them, if the internal radiation is less than or equal to the preset threshold and is not 0, it means that it is a valid reference indicator, and further judges whether the daily power generation (actual judgment of daily radiation) is valid.

[0052] Specifically, the above-mentioned first determination method is used to obtain the power generation index, including: Step S5231, calculate the difference between meteorological radiation and internal radiation.

[0053] It is worth noting that the difference here is the absolute value of the difference between the two radiation amounts.

[0054] Step S5232: If the difference is greater than the preset deviation, the meteorological radiation is used as the power generation index.

[0055] Step S5233: If the difference is less than or equal to the preset deviation, the internal radiation amount is used as the power generation index.

[0056] When the daily power generation is 0, it means that the daily radiation is invalid data, so the power generation index needs to be obtained based on the meteorological radiation and the internal radiation; if the difference between the meteorological radiation and the internal radiation is within the preset deviation, this means that the internal radiation is reliable and the internal radiation should be selected as the power generation index, otherwise the meteorological radiation should be selected.

[0057] Specifically, the second determination method is used to obtain the power generation index, including: Step S5234, calculate the difference between the internal radiation and the daily radiation.

[0058] It is worth noting that the difference here is also the absolute value of the difference between the two radiation amounts.

[0059] Step S5235: if the difference is greater than the preset deviation, a third judgment method is used to obtain the power generation index.

[0060] The third judgment method is: calculate the first difference between the meteorological radiation and the internal radiation; calculate the second difference between the meteorological radiation and the daily radiation; if the first difference is greater than the second difference, use the daily radiation as the power generation index; if the first difference is less than or equal to the second difference, use the internal radiation as the power generation index.

[0061] Here, the first difference and the second difference are both absolute values ​​after difference.

[0062] Step S5236: If the difference is less than or equal to the preset deviation, the internal radiation amount is used as the power generation index.

[0063] When the daily power generation is not 0, it means that the daily radiation is valid data. Therefore, the power generation index is determined based on the internal radiation and the daily radiation. If the difference between the internal radiation and the daily radiation is within the preset deviation, it means that the internal radiation is reliable, and the internal radiation is directly selected as the power generation index. Otherwise, if it is not within the preset deviation, the third judgment method is executed.

[0064] In the third judgment method, if the first difference is greater than the second difference, it means that the daily radiation is a reliable value and can be used as the power generation index. Otherwise, it means that the internal radiation is more reliable and the internal radiation is selected as the power generation index.

[0065] The above embodiment can reasonably identify and eliminate abnormal radiation, and realize the generation of solar radiation power generation index. After the power generation index is generated, data use service is provided to users through the data service interface.

[0066] In the user interface, you can access the regional solar radiation power generation index and the solar radiation power generation index of the power station under your jurisdiction according to the permission settings. The data display interface includes group index, regional index, curve chart, detailed records, etc., which can adapt to the needs of users with different roles and different scenarios. It not only helps users understand the power generation performance and reliability of the power station, but also provides support for the daily operation and management of photovoltaic power stations. For example, the insurance amount of a power station can be set according to the historical annual index value of a power station. For another example, since the index calculation is the result of the selection of the radiation quantity of the irradiator in the comprehensive power station, the daily power generation data and the external meteorological radiation, the power generation management of the power station can be judged according to the difference in values, and then the production can be guided. For another example, for power stations with excellent index performance, the installed capacity of the station can be expanded, or its management model can be promoted, or new power stations can be built in nearby areas, etc.

[0067] See also Figure 2 Another embodiment of the present application provides a device for calculating a solar radiation power generation index, comprising: The acquisition module 101 is used to acquire the target power station information; the target power station information includes the latitude and longitude information of the target power station, the installation angle of the photovoltaic modules, the installed capacity, the attenuation rate, the commissioning time and the calculation version information.

[0068] The collection module 102 is used to collect the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information.

[0069] The attenuation module 103 is used to calculate the cumulative attenuation data of the target power station according to the attenuation rate and the commissioning time.

[0070] The back calculation module 104 is used to calculate the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data.

[0071] The calculation module 105 is used to obtain a power generation index based on the internal radiation, the meteorological radiation and the daily radiation.

[0072] Furthermore, the above-mentioned attenuation module 103 is specifically used to determine the number of years of operation of the target power station according to the commissioning time; subtract 1 from the number of years of operation and multiply it by the annual attenuation rate minus the first-year attenuation rate to obtain the remaining annual attenuation rate; add the first-year attenuation rate and the remaining annual attenuation rate to obtain the cumulative attenuation data.

[0073] Furthermore, the above-mentioned inverse calculation module 104 is specifically used to obtain the acceptance loss value of the target power station; subtract the accumulated attenuation data from 1 to obtain the component efficiency; multiply the component efficiency, installed capacity and acceptance loss value to obtain the actual power generation; divide the daily power generation by the actual power generation to obtain the daily radiation.

[0074] Furthermore, the above-mentioned calculation module 105 is specifically used to use the meteorological radiation as the power generation index when the internal radiation is 0 and the daily power generation is 0; if the daily power generation is not 0, compare the daily radiation with the preset threshold to obtain the power generation index; when the internal radiation is not 0, compare the internal radiation with the preset threshold to obtain the power generation index.

[0075] For the specific limitations of a solar radiation power generation index calculation device provided in this embodiment, please refer to the embodiment of a solar radiation power generation index calculation method described above, which will not be repeated here. Each module in the above-mentioned solar radiation power generation index calculation device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0076] The embodiment of the present application provides a computer device, which may include a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the processor executes the steps of a method for calculating a solar radiation power generation index as in any of the above embodiments.

[0077] The working process, working details and technical effects of the computer device provided in this embodiment can be found in the above embodiment of a method for calculating a solar radiation power generation index, which will not be described in detail here.

[0078] The embodiment of 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 a method for calculating a solar radiation power generation index as in any of the above embodiments are implemented. The computer-readable storage medium refers to a carrier for storing data, which may include but is not limited to a floppy disk, an optical disk, a hard disk, a flash memory, a USB flash drive and / or a memory stick, etc. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The working process, working details and technical effects of the computer-readable storage medium provided in this embodiment can be found in the above embodiment of a method for calculating a solar radiation power generation index, which will not be repeated here.

[0079] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0080] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for calculating solar radiation power generation index, characterized in that: include: Obtain target power station information; The target power station information includes the latitude and longitude information of the target power station, the installation angle of the photovoltaic modules, the installed capacity, the attenuation rate, the commissioning time and the calculation version information; Collecting the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information; Calculating the accumulated attenuation data of the target power station according to the attenuation rate and the commissioning time; Calculating the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data; A power generation index is obtained based on the internal radiation amount, the meteorological radiation amount and the daily radiation amount.

2. The method for calculating the solar radiation power generation index according to claim 1, characterized in that: The calculating the accumulated attenuation data of the target power station according to the attenuation rate and the commissioning time includes: Determining the commissioning years of the target power station according to the commissioning time; Subtract 1 from the number of years of service and multiply it by the annual decay rate minus the decay rate of the first year to obtain the remaining annual decay rate; The first-year attenuation rate and the remaining-year attenuation rate are added together to obtain the cumulative attenuation data.

3. The method for calculating the solar radiation power generation index according to claim 2, characterized in that: The calculating the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data includes: Obtaining an acceptance loss value of the target power station; Subtract the accumulated attenuation data from 1 to obtain the component effectiveness; Multiplying the component efficiency, the installed capacity and the acceptance loss value to obtain actual power generation; The daily power generation is divided by the actual power generation to obtain the daily radiation.

4. The method for calculating the solar radiation power generation index according to claim 1, characterized in that: The obtaining of a power generation index based on the internal radiation, the meteorological radiation and the daily radiation comprises: If the internal radiation is 0, then when the daily power generation is 0, the meteorological radiation is used as the power generation index; when the daily power generation is not 0, the daily radiation is compared with a preset threshold to obtain the power generation index; If the internal radiation amount is not 0, the internal radiation amount is compared with the preset threshold to obtain the power generation index.

5. The method for calculating the solar radiation power generation index according to claim 4, characterized in that: The comparing the internal radiation amount with the preset threshold to obtain the power generation index includes: Determining whether the internal radiation amount is greater than the preset threshold; If yes, then compare the daily radiation with a preset threshold to obtain the power generation index; If not, when the daily power generation is 0, the power generation index is obtained by using the first judgment method; when the daily power generation is not 0, the power generation index is obtained by using the second judgment method.

6. The method for calculating the solar radiation power generation index according to claim 5, characterized in that: The comparing the daily radiation amount with a preset threshold to obtain the power generation index includes: If the daily radiation is greater than the preset threshold, the meteorological radiation is used as the power generation index; If the daily radiation is less than or equal to the preset threshold, calculating the difference between the meteorological radiation and the daily radiation; If the difference is greater than a preset deviation, the meteorological radiation is used as the power generation index; If the difference is less than or equal to the preset deviation, the daily radiation is used as the power generation index.

7. The method for calculating the solar radiation power generation index according to claim 5, characterized in that: The adopting the first judgment method to obtain the power generation index includes: Calculating the difference between the meteorological radiation and the internal radiation; If the difference is greater than a preset deviation, the meteorological radiation is used as the power generation index; If the difference is less than or equal to the preset deviation, the internal radiation amount is used as the power generation index.

8. The method for calculating the solar radiation power generation index according to claim 5, characterized in that: The adopting the second determination method to obtain the power generation index includes: Calculating the difference between the internal radiation and the daily radiation; If the difference is greater than the preset deviation, the power generation index is obtained by adopting a third judgment method; If the difference is less than or equal to the preset deviation, the internal radiation amount is used as the power generation index.

9. The method for calculating the solar radiation power generation index according to claim 8, characterized in that: The adopting the third judgment method to obtain the power generation index includes: Calculating a first difference between the meteorological radiation and the internal radiation; Calculating a second difference between the meteorological radiation and the daily radiation; If the first difference is greater than the second difference, taking the daily radiation as the power generation index; If the first difference is less than or equal to the second difference, the internal radiation amount is used as the power generation index.

10. A device for calculating solar radiation power generation index, characterized in that: include: An acquisition module is used to acquire target power station information; The target power station information includes the latitude and longitude information of the target power station, the installation angle of the photovoltaic modules, the installed capacity, the attenuation rate, the commissioning time and the calculation version information; A collection module, used for collecting the internal radiation, meteorological radiation and daily power generation of the target power station according to the target power station information; An attenuation module, used for calculating the accumulated attenuation data of the target power station according to the attenuation rate and the commissioning time; A back calculation module, used for calculating the daily radiation of the target power station based on the daily power generation and the accumulated attenuation data; A calculation module is used to obtain a power generation index based on the internal radiation, the meteorological radiation and the daily radiation.

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