Photovoltaic power station power generation calculation method, device, server and storage medium

Abstract

The present invention discloses a method, device, server and storage medium for calculating the increased power generation of a photovoltaic power station. The load rate of the inverter is obtained by calculating the daily output power data set and rated capacity of the inverter extracted from the database throughout the year, and then the load rate is divided into load rate intervals within a preset range to obtain the ratio of the power that can be increased in the target interval, and then the load rate factor of the target interval is obtained according to the inverter capacity ratio, and the increased power generation is calculated. By calculating the increased power generation through the present invention, the problems of difficulty in data acquisition and complex calculation in calculating the increased power generation through the power of photovoltaic modules are avoided, and the accuracy of the calculation of the increased power generation is improved to a certain extent, the calculation scheme is simplified, and the scope of application is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of photovoltaic power generation technology, and in particular to a method, device, server and storage medium for calculating increased power generation of a photovoltaic power station. Background Art

[0002] With the accelerated development of the photovoltaic power generation industry, the number of large-scale industrial and commercial photovoltaic power stations and ground power stations deployed is increasing. However, the inverter capacity is often designed according to the rated capacity of the components. Under low irradiance conditions, its output power cannot reach the nominal power. In addition, due to factors such as system loss and component attenuation, the inverter cannot work at full load most of the time.

[0003] Faced with this situation, most power stations use over-allocation to increase output power. That is, the output power is increased by increasing the DC power output to the inverter. The existing over-allocation design idea is to increase the capacity of the components to compensate for the attenuation of the components and the loss of the system, so that the inverter can achieve the effect of increasing power generation during actual use. This design idea is the design idea of ​​compensating for over-allocation; it also includes actively increasing the inverter power within a specific period of time after comprehensively considering various factors such as system loss and investment cost, and finding a balance between the increased component investment cost and the system power generation income to achieve the minimum cost per kilowatt-hour. This is the design idea of ​​the active over-allocation solution for photovoltaic systems.

[0004] On the premise of achieving the optimal cost per kilowatt-hour, calculating the additional power generation according to the over-allocated component power requires considering factors such as light characteristics, system losses and component attenuation. The calculation method is complex and the credibility of the calculation results is low. Summary of the invention

[0005] The embodiment of the present invention provides a method for calculating the increased power generation of a photovoltaic power station, so as to achieve the technical effect of calculating the increased power generation by calculating the load rate and capacity ratio of the inverter when the photovoltaic components connected to the inverter have different influencing factors.

[0006] Reading a daily output power data set and a rated capacity of a target inverter throughout the year from a database, and calculating a load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter throughout the year;

[0007] The load rate is divided into a preset number of load rate intervals, the corresponding inverter daily output power within the target load rate interval is counted, the actual capacity ratio is calculated according to the photovoltaic module installed capacity corresponding to the target inverter and the target inverter rated capacity, the actual capacity ratio is used as the initial capacity ratio, and the initial capacity ratio is updated using a preset step to obtain an updated capacity ratio, and according to the upper and lower boundaries of the target load rate interval, the power ratio that can be increased corresponding to the target load rate interval is obtained;

[0008] The increased power generation corresponding to the target load rate interval is calculated according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval.

[0009] Preferably, the step of reading the daily output power data set and the rated capacity of the inverter throughout the year from the database, and calculating the load rate of the inverter according to the daily output power data set and the rated capacity of the inverter throughout the year specifically includes:

[0010] Reading the daily output power data set and rated capacity of the target inverter throughout the year from the database;

[0011] Performing standardized preprocessing on the daily output power data set and rated capacity of the target inverter throughout the year, converting multiple data in a continuous preset time period in all daily output power data sets into one data, and storing all processed data in a data group;

[0012] The load factor of the target inverter is calculated according to the data group.

[0013] Preferably, after the step of reading the daily output power data set and rated capacity of the target inverter throughout the year from the database, the step further includes:

[0014] When the data missing rate of the target inverter is greater than a preset missing threshold, or the daily output power for a preset number of consecutive days is less than a preset power transmission threshold, it is determined that the target inverter has a fault, the calculation of the increased power generation is terminated, and the data of the target inverter is marked as faulty data.

[0015] Preferably, the method for converting a plurality of data in a continuous preset time period from all daily output power data sets into one data specifically includes:

[0016]

[0017] Among them, Date five is the converted data, which represents the data set with the preset time period as the time interval; Date is the real-time data in seconds, and t1 and t2 are the corresponding times of the first and last set of data recorded in the preset time period respectively; D rf The frequency of data collection within the preset time period.

[0018] Preferably, according to the upper and lower limits of the target load rate interval, a method for calculating the increaseable power ratio corresponding to the target load rate interval includes:

[0019]

[0020] Among them, γ nis the power ratio that can be increased, n is the target load rate range, x n,l and x n,h are respectively the lower limit and the upper limit of the boundary corresponding to the target load rate interval n.

[0021] Preferably, the step of calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval specifically includes:

[0022] The increaseable power ratio is compared with the corresponding updated capacity ratio to obtain the load factor corresponding to the updated capacity ratio, and the increased power generation corresponding to the target load rate interval is calculated based on the load factor and the power generation and power generation days in the target load rate interval.

[0023] Preferably, the increaseable power ratio is compared with the corresponding capacity ratio, and the comparison method includes:

[0024] When γ n <R inv -1, α n Take 1, when γ n ≥R inv -1, α n Take 0;

[0025] Among them, γ n is the power ratio that can be improved, α n is the load factor, n is the target load range, R inv For the capacity ratio.

[0026] Preferably, a method for calculating the additional power generation corresponding to the target load rate interval according to the load rate factor and the power generation and power generation days in the target load rate interval includes:

[0027]

[0028] Among them, E n is the additional power generation corresponding to the load rate interval n; e i,d is the power generation in load rate interval n within d days; α n is the load factor corresponding to load factor interval n, and i is the complete set of all load factor intervals.

[0029] Preferably, it also includes:

[0030] When the initial capacity ratio does not reach the preset upper limit value, taking the initial capacity ratio as the starting point, updating the capacity ratio of the target inverter using a preset step, and calculating the load factor and the corresponding increased power generation corresponding to the updated capacity ratio;

[0031] When the updated capacity ratio reaches the preset upper limit, all updated capacity ratios and corresponding increased power generation are saved.

[0032] The present invention further provides a photovoltaic power station increased power generation calculation device, the photovoltaic power station increased power generation calculation device comprising:

[0033] A load rate calculation unit, used to read the daily output power data set and rated capacity of the target inverter throughout the year from the database, and calculate the load rate of the target inverter according to the daily output power data set and rated capacity of the inverter throughout the year;

[0034] A capacity ratio and available power calculation unit, used to divide the load rate into a preset number of load rate intervals, count the daily output power of the inverter corresponding to the target load rate interval, calculate the actual capacity ratio according to the installed capacity of the photovoltaic modules corresponding to the target inverter and the rated capacity of the target inverter, use the actual capacity ratio as the initial capacity ratio, and use a preset step to update the initial capacity ratio to obtain an updated capacity ratio, and obtain the available power ratio corresponding to the target load rate interval according to the upper and lower boundaries of the target load rate interval;

[0035] The increased power generation calculation unit is used to calculate the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the initial capacity ratio, the power generation and the number of power generation days in the target load rate interval.

[0036] The present invention also proposes a server, which includes: a memory, a processor, and a photovoltaic power station increased power generation calculation program stored in the memory and capable of running on the processor, wherein the photovoltaic power station increased power generation calculation program, when executed by the processor, implements the photovoltaic power station increased power generation calculation method as described above.

[0037] The present invention also proposes a readable storage medium, which stores a photovoltaic power station increased power generation calculation program. When the photovoltaic power station increased power generation calculation program is executed by a processor, the photovoltaic power station increased power generation calculation method described above is implemented.

[0038] The present invention calculates the inverter load rate, divides the load rate into load rate intervals within a preset range, counts the corresponding inverter daily output power and the increaseable power ratio within the target load rate interval, and finally calculates the increased power generation, so that each inverter can have a different over-matching optimization scheme, which solves the technical problems of difficult data acquisition and high calculation complexity in the process of calculating the increased power generation by photovoltaic module power in the prior art, and achieves the technical effect of obtaining the inverter over-matching increased power generation without considering various complex situations of the photovoltaic module itself, which improves the accuracy of the increased power generation calculation to a certain extent, simplifies the calculation scheme, and improves the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flowchart of an embodiment of the task automatic configuration method of the present invention;

[0040] Figure 2 is a flow chart of another embodiment of the task automatic configuration method of the present invention;

[0041] Figure 3 is a flow chart of another embodiment of the task automatic configuration method of the present invention;

[0042] Figure 4 It is a structural schematic diagram of an embodiment of a task automatic configuration device of the present invention;

[0043] Figure 5 It is a schematic diagram of the server structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] Figure 1 A flowchart of a method for calculating the additional power generation of a photovoltaic power station provided in an embodiment of the present invention. This embodiment can be applied to the calculation of the additional power generation of a photovoltaic inverter due to over-allocation. The method can be executed by a computing device with a data processing function, and specifically includes:

[0046] S100, reading a daily output power data set and a rated capacity of a target inverter throughout the year from a database, and calculating a load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter throughout the year;

[0047] It should be noted that the energy source of photovoltaic power stations is the sun. When the conversion efficiency is close, the lighting conditions largely determine the power generation of photovoltaic modules. Roughly speaking, the lighting conditions at any place on the earth have a periodic pattern in years. Therefore, when reading data, it is best to read the data for the whole year. If the data volume is limited, you can set a longer period data set by yourself. It is recommended to be no less than three months. The data read here includes daily output power, and the rated capacity is the rated output capacity of the inverter. Dividing the daily output power data set by the rated capacity can obtain the load rate corresponding to all the power of the target inverter on that day.

[0048] S200, dividing the load rate into a preset number of load rate intervals, counting the daily output power of the inverter corresponding to the target load rate interval, calculating the actual capacity ratio according to the installed capacity of the photovoltaic modules corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity ratio as the initial capacity ratio, and updating the initial capacity ratio using a preset step to obtain an updated capacity ratio, and obtaining the increaseable power ratio corresponding to the target load rate interval according to the upper and lower limits of the boundary of the target load rate interval;

[0049] It should be noted that the calculation method of the installed capacity can be obtained by querying the database of the photovoltaic power station. When the data is not available in the database, it can be obtained by calculation. The calculation method includes: selecting a target inverter, recording the photovoltaic components that transmit electrical energy to the target inverter and the corresponding nominal power, and taking the sum of the nominal powers of all recorded photovoltaic components as the installed capacity.

[0050] It is easy to understand that due to the large difference in power generation in different load ranges, such as in the dawn and dusk period or in weather with poor lighting conditions, the power generation is extremely low. At this time, even if the capacity-to-load ratio reaches the upper limit of the design specification, the full power generation state cannot be achieved. Therefore, it is necessary to divide the load rate into a preset range of load rate intervals and select a suitable interval for calculation. The selection of this interval has different selection methods depending on the inverter and the over-allocation strategy. For example, when the over-allocation capability of the inverter is high and the over-allocation strategy is active over-allocation, the selected load interval will be lower, and the load rate that the inverter can achieve most of the time will be selected.

[0051] It is worth noting that according to the conditions of the inverter and the over-allocation strategy, the target load range is already relatively wide when it is selected. The purpose of over-allocation to increase power generation is to put more power generation time into the high-load range. The preset step is set according to the photovoltaic components, that is, after increasing the smallest unit of photovoltaic components, the corresponding increased capacity ratio is the preset step, which can be obtained by increasing the preset step multiple times.

[0052] S300, calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval.

[0053] It should be emphasized that after obtaining the increaseable power ratio and the initial capacity ratio, it is already possible to guide the over-allocation of photovoltaic power stations. Calculating the increased power generation can enable deeper data analysis, such as investment recovery period, gain internal rate of return, levelized cost of electricity and capital profit rate.

[0054] The technical solution of this embodiment divides the load rate into load rate intervals within a preset range by calculating the inverter load rate, statistics the corresponding inverter daily output power and the power increase ratio within the target load rate interval, and finally calculates the increased power generation. The increased power generation corresponding to each over-matching optimization scheme under different capacity ratios can be displayed according to the power generation situation after attenuation of different photovoltaic modules. The technical problems of difficult data acquisition and high calculation complexity in the process of calculating the increased power generation through photovoltaic modules in the prior art are solved, and the technical effect of obtaining the over-matching increased power generation of the inverter can be achieved without considering the various complex situations of the photovoltaic modules themselves. The accuracy of the calculation of the increased power generation is improved to a certain extent, the calculation scheme is simplified, and the scope of application is improved.

[0055] Reference Figure 2 , Figure 2 1 is a flow chart of another embodiment of the automatic task configuration method of the present invention. The method for calculating the increased power generation of a photovoltaic power station provided by the present invention includes the following steps in addition to the above steps S100-S300:

[0056] S110, reading the daily output power data set and rated capacity of the target inverter throughout the year from the database;

[0057] The daily output power is the output power at each moment of the day. Usually, the database will record the data at the second level, that is, the output power every second or every few seconds. The data recorded continuously is the daily output power set. The daily output power data set includes all the recorded times and the corresponding output power values ​​for each day of the year.

[0058] S120, performing standardized preprocessing on the daily output power data set and rated capacity of the target inverter throughout the year, converting multiple data in a continuous preset time period in all daily output power data sets into one data, and storing all processed data in a data group;

[0059] It should be noted that there are many existing methods of standardized preprocessing, and the purpose of the processing is to convert the data in the database that is easy to store into data that is easy to calculate. The specific processing method needs to select the corresponding standardized processing method according to the type of database. Since the data of the daily output power set is relatively large, when conducting large-scale statistics, too much data will bring unnecessary calculations, and the original data may have unstable collection frequency due to transmission and storage problems. Therefore, converting a data set within a period of time into one data can effectively reduce the total amount of data involved in subsequent calculations, and can effectively avoid the impact of unstable collection frequency, so that each parameter of each device is consistent in time period and data volume, while eliminating the interference of some maximum and minimum values.

[0060] S130. Calculate the load rate of the target inverter according to the data group.

[0061] It is easy to understand that after converting the data within a period of time into one data, the data can be used to represent the output power of the target inverter during the period of time, and then the load rate of the target inverter can be obtained by dividing it by the rated capacity of the target inverter.

[0062] Specifically, after the step of reading the daily output power data set and rated capacity of the target inverter throughout the year from the database, the step further includes:

[0063] When the data missing rate of the target inverter is greater than a preset missing threshold, or the daily output power for a preset number of consecutive days is less than a preset power transmission threshold, it is determined that the target inverter has a fault, the calculation of the increased power generation is terminated, and the data of the target inverter is marked as faulty data.

[0064] It should be noted that if the data missing rate of the target inverter is greater than the preset missing threshold, it can be understood that the data of the target inverter has not been correctly recorded, or the target inverter has been inspected, maintained, replaced, or the power generation equipment where the inverter is located has failed. In this case, the historical data cannot represent the actual situation of the inverter, so the corresponding increased power generation calculation is terminated, and the inverter corresponding to the data is marked as a problem inverter. The administrator can delete or modify it according to the actual situation. In this embodiment, the preset missing threshold is 50%.

[0065] If the daily output power for a preset number of consecutive days is less than the preset transmission threshold, it can be understood as long-term low-load operation. The power generation equipment where this inverter is located may have problems such as poor lighting conditions and serious loss of photovoltaic components. At this time, the equipment needs to be repaired and replaced. After the repair or replacement, the reference value of historical data is low, so it still needs to be marked for further management by the administrator.

[0066] Specifically, the method for converting a plurality of data in a continuous preset time period in all daily output power data sets into one data specifically includes:

[0067]

[0068] Among them, Date five is the converted data, which represents the data set with the preset time period as the time interval; Date is the real-time data in seconds, and t1 and t2 are the corresponding times of the first and last set of data recorded in the preset time period respectively; D rf The frequency of data collection within the preset time period.

[0069] It should be noted that the preset time period in this embodiment is 5 minutes. The total amount of data collected within 5 minutes is counted and divided by the frequency of data collection within the 5 minutes to obtain relatively average data. The accuracy of the data can be further improved by deleting outliers. However, due to the large amount of data, the amount of data calculation for deleting outliers is large. In order to reduce the amount of calculation and reduce the calculation time, only using the above-mentioned calculation method can meet the calculation requirements.

[0070] Specifically, according to the upper and lower limits of the target load rate interval, a method for calculating the increaseable power ratio corresponding to the target load rate interval includes:

[0071]

[0072] Among them, γ n is the power ratio that can be increased, n is the target load rate range, x n,l and x n,h are respectively the lower limit and the upper limit of the boundary corresponding to the target load rate interval n.

[0073] It is worth emphasizing that according to the inverter conditions and over-allocation strategy, the target load range is already selected over a wide range. The purpose of over-allocation to increase power generation is to increase the load rate while pursuing the best economy. Therefore, when x n,h When the upper boundary of the target load range exceeds 100%, the overload allowed by the inverter is not considered. At this time, the power ratio can be increased to 0, and only x n,h There is room for improvement only when it is less than or equal to 100%.

[0074] This embodiment ensures the accuracy of data by excluding faulty inverters, and effectively avoids the impact of unstable data collection frequency by disclosing the method for judging faulty inverters, so that each parameter of each device remains consistent in time period and data volume, while eliminating interference from some maximum and minimum values. The method of converting public data sets into single data and the calculation method that can improve the power ratio further improve the accuracy of data processing, improve the technical solution, improve the accuracy of increased power generation calculation, and reduce the difficulty of data management and improve the user experience by marking the fault data corresponding to the fault.

[0075] Reference Figure 3 , Figure 3 is a flow chart of another embodiment of the task automatic configuration method of the present invention,

[0076] The step of calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the inverter daily output power and power generation days corresponding to the target load rate interval specifically includes:

[0077] The increaseable power ratio is compared with the corresponding updated capacity ratio to obtain the load factor corresponding to the updated capacity ratio, and the increased power generation corresponding to the target load rate interval is calculated based on the load factor and the power generation and power generation days in the target load rate interval.

[0078] It should be noted that the actual capacity ratio is greater than 100%, and the excess is greater than or equal to the increaseable power ratio. This situation needs to be distinguished from the situation where the actual capacity ratio minus 100% is less than the increaseable power ratio. Therefore, it is necessary to increase the load rate factor to distinguish the two scenarios.

[0079] Specifically, the increaseable power ratio is compared with the corresponding actual capacity ratio, and the comparison method includes:

[0080] When γ n <R inv -1, α n Take 1, when γ n ≥R inv -1, α n Take 0;

[0081] Among them, γ n is the power ratio that can be improved, α n is the load factor, n is the target load range, R inv For the capacity ratio.

[0082] It is easy to understand that when the difference between the capacity ratio and the increaseable power ratio is greater than 1, there is room for improvement in power generation, so the load factor in this scenario is 1. When the difference between the capacity ratio and the increaseable power ratio is less than or equal to 1, power generation cannot be increased any more, so the load factor in this scenario is 0.

[0083] Specifically, the method for calculating the additional power generation corresponding to the target load rate interval according to the load rate factor and the power generation and power generation days in the target load rate interval includes:

[0084]

[0085] Among them, E n is the additional power generation corresponding to the load rate interval n; e i,d is the power generation in load rate interval n within d days; α n is the load factor corresponding to load factor interval n, and i is the complete set of all load factor intervals.

[0086] It should be noted that the calculation formula of this embodiment sets the load days to 365 days, that is, one year, so as to obtain the increased power generation for the whole year, and the calculation method of this increased power generation uses multiple sets to count the increased power generation of all load intervals at one time, thereby reducing the calculation steps.

[0087] Specifically, it also includes:

[0088] When the initial capacity ratio does not reach the preset upper limit value, taking the initial capacity ratio as the starting point, updating the capacity ratio of the target inverter using a preset step, and calculating the load factor and the corresponding increased power generation corresponding to the updated capacity ratio;

[0089] It is easy to understand that the preset upper limit value in some specific scenarios can take the maximum allowable amount of 1.8 in the third type of lighting area according to the "Design Specifications for Photovoltaic Power Stations" GB 50797. This value is the safety standard in the industry. The maximum allowable upper limit can also be set according to the on-site expandable conditions. This embodiment uses 1.8 as the upper limit value of the capacity ratio.

[0090] When the updated capacity ratio reaches the preset upper limit, all updated capacity ratios and corresponding increased power generation are saved.

[0091] It should be noted that after using the preset step to update the capacity ratio of the target inverter, if the updated capacity ratio is inconsistent with the initial capacity ratio, the calculated increased power generation will also be inconsistent. After multiple updates, the updated capacity ratio reaches the preset upper limit value, then all feasible capacity ratios and corresponding increased power generation are calculated, and the appropriate capacity ratio can be selected through simple manual comparison.

[0092] Specifically, the calculation of the additional power generation can also reduce the power generation cost of the photovoltaic power station according to the data of the additional power generation. The investment payback period, internal rate of return on capital increase, levelized cost of electricity and capital profit rate of photovoltaic over-allocation can be further calculated according to the relationship between the capacity-matching ratio and the over-power generation, so as to obtain the over-allocation plan that best meets the investment goal. All the indicators involved should take into account the component attenuation. The specific attenuation value can be found in the manufacturer's manual. The specific calculation formulas are as follows:

[0093] Investment payback period R. Due to the uncertainty of environmental conditions and photovoltaic modules themselves, the net investment flow that can be recovered each year is different. Therefore, assuming that the investment payback period is greater than or equal to m years and less than m+1 years, then:

[0094] R = m + funds not recovered by the mth year / net cash flow in the (m+1)th year

[0095] The internal rate of return (IRR) of capital increase is the discount rate when the total present value of capital inflows is equal to the total present value of capital outflows and the net present value is zero. It is calculated as follows:

[0096] IRR=a+NPV a / NPV a -NPV b ]*(ba)

[0097] Among them, a and b are discount rates, the former is greater than the latter; NPV a and NPV b is the net present value corresponding to the discount rate a and b, the former is positive and the latter is negative.

[0098] The levelized cost of electricity (LCOE) is calculated according to the internationally accepted algorithm as follows:

[0099]

[0100] Among them, P dynamic,cost The construction cost includes component input cost, installation cost, component support, infrastructure cost, etc. The reduction in production costs due to taxes and asset depreciation over the life cycle; For operation and maintenance costs; is the residual value and present value of fixed assets; is the present value of the excess power generation, that is, E n ;

[0101] The annual return on equity (ROE) is calculated as follows:

[0102] ROE = net profit of the year / initial capital investment.

[0103] This embodiment improves the technical solution by disclosing a detailed calculation method, improves the working efficiency of the inverter to a certain extent, and at the same time ensures the safety of the photovoltaic power station by introducing safety standards within the industry, extends the service life of the photovoltaic power station, and achieves the effect of improving the power generation efficiency of the photovoltaic power station. By calculating the increased power generation, the results can be intuitively displayed in the form of data, which is convenient for comparison and selection, thereby improving the user experience.

[0104] Reference Figure 4 , Figure 4 : is a schematic diagram of the structure of an embodiment of the task automatic configuration device of the present invention. The present invention also proposes a photovoltaic power station increased power generation calculation device, the photovoltaic power station increased power generation calculation device comprising:

[0105] A load rate calculation unit 10 is used to read a daily output power data set and a rated capacity of a target inverter throughout the year from a database, and calculate a load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter throughout the year;

[0106] The capacity ratio and the amount of electricity that can be increased calculation unit 20 is used to divide the load rate into a preset number of load rate intervals, count the daily output electricity of the inverter corresponding to the target load rate interval, calculate the actual capacity ratio according to the photovoltaic module installed capacity corresponding to the target inverter and the rated capacity of the target inverter, use the actual capacity ratio as the initial capacity ratio, and use the preset step to update the initial capacity ratio to obtain the updated capacity ratio, and obtain the amount of electricity that can be increased corresponding to the target load rate interval according to the upper and lower boundaries of the target load rate interval;

[0107] The increased power generation calculation unit 30 calculates the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval.

[0108] The photovoltaic power station increased power generation calculation device provided in the embodiment of the present invention can execute the photovoltaic power station increased power generation calculation method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method, which will not be described one by one here.

[0109] like Figure 5 As shown, Figure 5 Schematic diagram of the server structure of another embodiment of the present invention. The server includes a processor 70, a memory 71, an input device 72 and an output device 73; the number of processors 70 in the server can be one or more. Figure 5 A processor 70 is taken as an example; the processor 70, the memory 71, the input device 72 and the output device 73 in the server can be connected by a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0110] The memory 71 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as program instructions corresponding to the method for calculating the increased power generation of a photovoltaic power station in the embodiment of the present invention. The processor 70 executes various functional applications and data processing of the server by running the software programs, instructions and modules stored in the memory 71, that is, realizing the above-mentioned method for calculating the increased power generation of a photovoltaic power station.

[0111] The memory 71 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 71 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 71 may further include a memory remotely arranged relative to the processor 70, and these remote memories may be connected to the server 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.

[0112] The input device 72 may be used to receive input digital or character information and generate key signal input related to the user settings and function control of the server. The output device 73 may include a display server such as a display screen.

[0113] An embodiment of the present invention further provides a storage medium comprising computer executable instructions, wherein the computer executable instructions are used to execute a method for calculating an increased amount of electricity generated by a photovoltaic power station when executed by a computer processor, the method comprising:

[0114] Reading a daily output power data set and a rated capacity of a target inverter throughout the year from a database, and calculating a load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter throughout the year;

[0115] The load rate is divided into a preset number of load rate intervals, the corresponding inverter daily output power within the target load rate interval is counted, the actual capacity ratio is calculated according to the photovoltaic module installed capacity corresponding to the target inverter and the target inverter rated capacity, the actual capacity ratio is used as the initial capacity ratio, and the initial capacity ratio is updated using a preset step to obtain an updated capacity ratio, and according to the upper and lower boundaries of the target load rate interval, the power ratio that can be increased corresponding to the target load rate interval is obtained;

[0116] The increased power generation corresponding to the target load rate interval is calculated according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval.

[0117] Specifically, the steps of reading the daily output power data set and the rated capacity of the inverter throughout the year from the database, and calculating the load rate of the inverter according to the daily output power data set and the rated capacity of the inverter throughout the year specifically include:

[0118] Reading the daily output power data set and rated capacity of the target inverter throughout the year from the database;

[0119] Performing standardized preprocessing on the daily output power data set and rated capacity of the target inverter throughout the year, converting multiple data in a continuous preset time period in all daily output power data sets into one data, and storing all processed data in a data group;

[0120] The load factor of the target inverter is calculated according to the data group.

[0121] Specifically, after the step of reading the daily output power data set and rated capacity of the target inverter throughout the year from the database, the step further includes:

[0122] When the data missing rate of the target inverter is greater than a preset missing threshold, or the daily output power for a preset number of consecutive days is less than a preset power transmission threshold, it is determined that the target inverter has a fault, the calculation of the increased power generation is terminated, and the data of the target inverter is marked as faulty data.

[0123] Specifically, the method for converting a plurality of data in a continuous preset time period in all daily output power data sets into one data specifically includes:

[0124]

[0125] Among them, Date five is the converted data, which represents the data set with the preset time period as the time interval; Date is the real-time data in seconds, and t1 and t2 are the corresponding times of the first and last set of data recorded in the preset time period respectively; D rf The frequency of data collection within the preset time period.

[0126] Specifically, according to the upper and lower limits of the target load rate interval, a method for calculating the increaseable power ratio corresponding to the target load rate interval includes:

[0127]

[0128] Among them, γ n is the power ratio that can be increased, n is the target load rate range, x n,l and x n,h are respectively the lower limit and the upper limit of the boundary corresponding to the target load rate interval n.

[0129] Specifically,

[0130] The step of calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the inverter daily output power and power generation days corresponding to the target load rate interval specifically includes:

[0131] The increaseable power ratio is compared with the corresponding updated capacity ratio to obtain the load factor corresponding to the updated capacity ratio, and the increased power generation corresponding to the target load rate interval is calculated based on the load factor and the power generation and power generation days in the target load rate interval.

[0132] Specifically, the increaseable power ratio is compared with the corresponding capacity ratio, and the comparison method includes:

[0133] When γ n <R inv -1, α n Take 1, when γ n ≥R inv -1, α n Take 0;

[0134] Among them, γ n is the power ratio that can be improved, α n is the load factor, n is the target load range, R inv For the capacity ratio.

[0135] Specifically, the method for calculating the additional power generation corresponding to the target load rate interval according to the load rate factor and the power generation and power generation days in the target load rate interval includes:

[0136]

[0137] Among them, E n is the additional power generation corresponding to the load rate interval n; e i,d is the power generation in load rate interval n within d days; α n is the load factor corresponding to load factor interval n, and i is the complete set of all load factor intervals.

[0138] Specifically, it also includes:

[0139] When the initial capacity ratio does not reach the preset upper limit value, taking the initial capacity ratio as the starting point, updating the capacity ratio of the target inverter using a preset step, and calculating the load factor and the increased power generation corresponding to the target load ratio interval of the updated capacity ratio;

[0140] When the updated capacity ratio reaches the preset upper limit, all updated capacity ratios and corresponding increased power generation are saved.

[0141] Of course, the storage medium containing computer executable instructions provided in an embodiment of the present invention is not limited to the method operations described above, but can also execute the relevant operations in the photovoltaic power station increased power generation calculation method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method, which will not be described one by one here.

[0142] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk or an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0143] It is worth noting that in the embodiment of the above-mentioned search device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0144] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for calculating the additional power generation of a photovoltaic power station, characterized in that: include: Reading a daily output power data set and a rated capacity of a target inverter throughout the year from a database, and calculating a load rate of the target inverter according to the daily output power data set and the rated capacity of the target inverter throughout the year; The load rate is divided into a preset number of load rate intervals, the corresponding inverter daily output power within the target load rate interval is counted, the actual capacity ratio is calculated according to the photovoltaic module installed capacity corresponding to the target inverter and the target inverter rated capacity, the actual capacity ratio is used as the initial capacity ratio, and the initial capacity ratio is updated using a preset step to obtain an updated capacity ratio, and according to the upper and lower boundaries of the target load rate interval, the power ratio that can be increased corresponding to the target load rate interval is obtained; Calculate the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval; Among them, according to the upper limit and the lower limit of the target load rate interval, the calculation method for obtaining the increaseable power ratio corresponding to the target load rate interval includes: Among them, γ n is the power ratio that can be increased, n is the target load rate range, x n,l and x n,h are respectively the lower boundary limit and the upper boundary limit corresponding to the target load rate interval n; The step of calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval specifically includes: Compare the increaseable power ratio with the corresponding updated capacity ratio to obtain the load factor corresponding to the updated capacity ratio, and calculate the increased power generation corresponding to the target load ratio interval according to the load factor, the power generation in the target load ratio interval and the number of power generation days; The method for calculating the additional power generation corresponding to the target load rate interval according to the load rate factor, the power generation in the target load rate interval, and the number of power generation days includes: Wherein, E is the additional power generation corresponding to the target load rate interval; e n,d is the power generation in the target load rate interval n within d days; α n is the load factor corresponding to the target load factor interval n, and i is the full set of all load factor intervals.

2. The method for calculating the increased power generation of a photovoltaic power station according to claim 1, characterized in that: The step of reading the daily output power data set and the rated capacity of the target inverter throughout the year from the database, and calculating the load rate of the target inverter according to the daily output power data set and the rated capacity of the target inverter throughout the year specifically includes: Reading the daily output power data set and rated capacity of the target inverter throughout the year from the database; Performing standardized preprocessing on the daily output power data set and rated capacity of the target inverter throughout the year, converting multiple data in a continuous preset time period in all daily output power data sets into one data, and storing all processed data in a data group; The load factor of the target inverter is calculated according to the data group.

3. The method for calculating the increased power generation of a photovoltaic power station according to claim 2, characterized in that: After the step of reading the daily output power data set and rated capacity of the target inverter throughout the year from the database, the method further includes: When the data missing rate of the target inverter is greater than a preset missing threshold, or the daily output power for a preset number of consecutive days is less than a preset power transmission threshold, it is determined that the target inverter is faulty, the calculation of the increased power generation is terminated, and the data of the target inverter is marked as faulty data.

4. The method for calculating the increased power generation of a photovoltaic power station according to claim 1, characterized in that: Also includes: When the initial capacity ratio does not reach the preset upper limit value, taking the initial capacity ratio as the starting point, updating the capacity ratio of the target inverter using the preset step, and calculating the load factor and the corresponding increased power generation corresponding to the updated capacity ratio; When the updated capacity-matching ratio reaches the preset upper limit value, all updated capacity-matching ratios and corresponding increased power generation are saved.

5. A photovoltaic power station power generation calculation device, characterized in that: The photovoltaic power station increased power generation calculation device comprises: A load rate calculation unit, used to read the daily output power data set and rated capacity of the target inverter throughout the year from the database, and calculate the load rate of the target inverter according to the daily output power data set and rated capacity of the target inverter throughout the year; A capacity ratio and available power calculation unit, used to divide the load rate into a preset number of load rate intervals, count the daily output power of the inverter corresponding to the target load rate interval, calculate the actual capacity ratio according to the installed capacity of the photovoltaic modules corresponding to the target inverter and the rated capacity of the target inverter, use the actual capacity ratio as the initial capacity ratio, and use a preset step to update the initial capacity ratio to obtain an updated capacity ratio, and obtain the available power ratio corresponding to the target load rate interval according to the upper and lower boundaries of the target load rate interval; An increased power generation calculation unit, used to calculate the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval; Among them, according to the upper limit and the lower limit of the target load rate interval, the calculation method for obtaining the increaseable power ratio corresponding to the target load rate interval includes: Among them, γ n is the power ratio that can be increased, n is the target load rate range, x n,l and x n,h are respectively the lower boundary limit and the upper boundary limit corresponding to the target load rate interval n; The step of calculating the increased power generation corresponding to the target load rate interval according to the increaseable power ratio, the updated capacity ratio, and the corresponding inverter daily output power and power generation days within the target load rate interval specifically includes: Compare the increaseable power ratio with the corresponding updated capacity ratio to obtain the load factor corresponding to the updated capacity ratio, and calculate the increased power generation corresponding to the target load ratio interval according to the load factor, the power generation in the target load ratio interval and the number of power generation days; The method for calculating the additional power generation corresponding to the target load rate interval according to the load rate factor, the power generation in the target load rate interval, and the number of power generation days includes: Wherein, E is the additional power generation corresponding to the target load rate interval; e n,d is the power generation in the target load rate interval n within d days; α n is the load factor corresponding to the target load factor interval n, and i is the full set of all load factor intervals.

6. A server, characterized in that: The server includes: a memory, a processor, and a photovoltaic power station increased power generation calculation program stored in the memory and running on the processor. When the photovoltaic power station increased power generation calculation program is executed by the processor, the photovoltaic power station increased power generation calculation method according to any one of claims 1 to 4 is implemented.

7. A readable storage medium, characterized in that: The readable storage medium stores a photovoltaic power station increase power generation calculation program, and when the photovoltaic power station increase power generation calculation program is executed by the processor, the photovoltaic power station increase power generation calculation method according to any one of claims 1 to 4 is implemented.

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