CN114328597A - Method and device for calculating power increasing amount of photovoltaic power station, server and storage medium - Google Patents
Method and device for calculating power increasing amount of photovoltaic power station, server and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for calculating the power increasing amount of a photovoltaic power station, a server and a storage medium. The load rate of the inverter is obtained by calculating a daily output power data set and rated capacity of the inverter extracted from a database all year round, then the load rate is divided into load rate intervals in a preset range to obtain a ratio of the liftable electric quantity in a target interval, then a load rate factor of the target interval is obtained according to the capacity ratio of the inverter, and the power increasing amount is obtained by calculation. By calculating the power increasing quantity, the problems of difficult data acquisition, complex calculation and the like existing in the process of calculating the power increasing quantity through the power of the photovoltaic module are solved, the accuracy of calculating the power increasing quantity is improved to a certain extent, the calculation scheme is simplified, and the application range is widened.
Description
Technical Field
The embodiment of the invention relates to the technical field of photovoltaic power generation, in particular to a method and a device for calculating the power increasing amount of a photovoltaic power station, a server and a storage medium.
Background
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 is more and more, however, the capacity of the inverter is often designed according to the rated capacity of the component, the output power of the inverter cannot reach the nominal power under the condition of low irradiance, and the inverter cannot work at full load in most time due to the influence of factors such as system loss and component attenuation.
In the face of the situation, most power stations adopt an over-distribution mode to improve output power. The output power is improved by improving the direct current power output to the inverter, and the existing design idea of the over-matching is to improve the capacity of a component to compensate for the attenuation of the component and the loss of a system, so that the inverter can achieve the effect of improving the generating capacity in the actual use process, and the design idea is the design idea of compensating the over-matching; the method also comprises the steps that after various factors of system loss and investment cost are comprehensively considered, in a specific year, the power of the inverter is actively improved, a balance point is searched between the increased component investment cost and the system power generation income, and the electricity consumption cost is minimum, namely the design idea of the photovoltaic system active super formula scheme is realized.
On the premise of realizing optimal power cost, factors such as illumination characteristics, system loss, component attenuation and the like need to be considered when the power increase amount is calculated according to the power of the super-distribution component, the calculation mode is complex, and the reliability of the calculation result is low.
Disclosure of Invention
The embodiment of the invention provides a method for calculating the power generation increasing amount of a photovoltaic power station, which aims to realize the technical effect of calculating the power generation increasing amount by calculating the load rate and the volume ratio of an inverter under the condition that the influence factors of photovoltaic modules connected with the inverter are different.
Reading a annual daily output power data set and rated capacity of a target inverter from a database, and calculating the load rate of the target inverter according to the annual daily output power data set and rated capacity of the inverter;
dividing the load rate into load rate intervals with preset quantity, counting the daily output electric quantity of the corresponding inverter in the target load rate interval, calculating the actual capacity ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity ratio as the initial capacity ratio, updating the initial capacity ratio by using preset steps to obtain the updated capacity ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and calculating the power increasing quantity corresponding to the target load rate interval according to the ratio of the liftable power quantity, the updated capacity ratio, the daily output power quantity of the inverter corresponding to the target load rate interval and the number of power generation days.
Preferably, the step of reading the annual daily output power data set of the inverter and the rated capacity thereof from the database, and calculating the load factor of the inverter according to the annual daily output power data set of the inverter and the rated capacity thereof specifically includes:
reading a yearly daily output power data set and rated capacity of the target inverter from a database;
carrying out standardized preprocessing on the annual daily output power data set and rated capacity of the target inverter, converting a plurality of data in all the daily output power data sets within a continuous preset time period into one data, and storing all the processed data into a data group;
and calculating the load rate of the target inverter according to the data group.
Preferably, the step of reading the annual daily output power dataset and the rated capacity of the target inverter from the database further comprises:
and when the data loss rate of the target inverter is greater than a preset loss threshold value or the daily output power of continuous preset days is smaller than a preset power transmission threshold value, judging that the target inverter has a fault, finishing the calculation of the power increasing and generating capacity, and marking the data of the target inverter as fault data.
Preferably, 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:
wherein DatefiveThe converted data represents a data set with a preset time period as a time interval; date is second-level real-time data, t1And t2Respectively corresponding moments of the first group and the last group of data recorded in a preset time period; drfThe data acquisition frequency in the preset time period is set.
Preferably, the calculation method for obtaining the liftable power ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval includes:
wherein, γnN is the target load rate interval, xn,lAnd xn,hAnd respectively representing a boundary lower limit and a boundary upper limit corresponding to the target load rate interval n.
Preferably, the step of calculating the increased power generation amount corresponding to the target load rate interval according to the ratio of the liftable power amounts, the updated capacity ratio, the daily output power amount of the inverter corresponding to the target load rate interval, and the number of power generation days specifically includes:
and comparing the ratio of the liftable electric quantity with the corresponding updated capacity ratio to obtain a load rate factor corresponding to the updated capacity ratio, and calculating the increased power generation quantity corresponding to the target load rate interval according to the load rate factor, the power generation quantity of the target load rate interval and the number of power generation days.
Preferably, the method for comparing the ratio of the liftable electric quantity with the corresponding capacity ratio comprises the following steps:
when gamma isn<RinvAt-1 time, αnTaking 1 when gamman≥RinvAt-1 time, αnTaking 0;
wherein, γnFor the liftable electric quantity ratio, αnIs the load factor, n is the target load interval, RinvIs prepared by volume ratio.
Preferably, the method for calculating the increased power generation amount corresponding to the target load rate section according to the load rate factor, the power generation amount of the target load rate section and the power generation days includes:
wherein E isnThe increased power generation amount corresponding to the load rate interval n; e.g. of the typei,dThe power generation amount of the load rate interval n in d days is obtained; alpha is alphanAnd i is a load factor corresponding to the load rate interval n, and i is a complete set of all load rate intervals.
Preferably, the method further comprises the following steps:
when the initial capacity ratio does not reach a preset upper limit value, taking the initial capacity ratio as a starting point, updating the capacity ratio of the target inverter by using preset steps, and calculating a load factor corresponding to the updated capacity ratio and a corresponding increased power generation amount;
and when the updated capacity ratio reaches a preset upper limit value, storing all the updated capacity ratios and corresponding increased power generation quantity.
The invention also provides a photovoltaic power station power increase amount calculation device, which comprises:
the load rate calculation unit is used for reading a daily output power data set and rated capacity of a target inverter all year round from a database and calculating the load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter all year round;
the capacity-matching ratio and liftable electric quantity calculating unit is used for dividing the load rate into load rate intervals with preset quantity, counting the daily output electric quantity of the corresponding inverter in the target load rate interval, calculating the actual capacity-matching ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity-matching ratio as the initial capacity-matching ratio, updating the initial capacity-matching ratio by using preset steps to obtain the updated capacity-matching ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and the power generation increasing amount calculation unit is used for calculating the power generation increasing amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the initial capacity ratio, the power generation amount of the target load rate interval and the power generation days.
The invention also proposes a server comprising: the device comprises a memory, a processor and a photovoltaic power station increased power generation amount calculation program which is stored on the memory and can run on the processor, wherein when the processor executes the photovoltaic power station increased power generation amount calculation program, the photovoltaic power station increased power generation amount calculation method is realized.
The invention also provides a readable storage medium, wherein the readable storage medium stores a photovoltaic power station power increase calculation program, and the photovoltaic power station power increase calculation program realizes the photovoltaic power station power increase calculation method when being executed by a processor.
According to the invention, the load rate is divided into the load rate interval in the preset range by calculating the load rate of the inverter, the daily output electric quantity and the ratio of the liftable electric quantity of the inverter corresponding to the target load rate interval are counted, and finally the power increase and generation quantity is calculated, so that each inverter has different over-distribution optimization schemes, the technical problems that in the prior art, the data acquisition is difficult and the calculation complexity is high in the process of calculating the power increase and generation quantity through the power of the photovoltaic module are solved, the technical effect that the over-distribution power increase and generation quantity of the inverter can be obtained without considering various complex conditions of the photovoltaic module per se is realized, the accuracy of the power increase and generation quantity calculation is improved to a certain extent, the calculation scheme is simplified, and the application range is widened.
Drawings
FIG. 1 is a flow chart illustrating an embodiment of a task auto-configuration method of the present invention;
FIG. 2 is a flow chart illustrating an alternative embodiment of a task auto-configuration method according to the present invention;
FIG. 3 is a flow chart illustrating an alternative embodiment of a task auto-configuration method of the present invention;
FIG. 4 is a schematic structural diagram of an embodiment of the task automatic configuration device of the present invention;
fig. 5 is a schematic diagram of a server structure in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart of a method for calculating an amount of power generation increase of a photovoltaic power station according to an embodiment of the present invention, where the embodiment is applicable to calculating an amount of power generation increase of a photovoltaic inverter, and the method may be executed by a computing device having a data processing function, and specifically includes:
s100, reading a annual daily output power data set and rated capacity of a target inverter from a database, and calculating the load rate of the target inverter according to the annual daily output power data set and the rated capacity of the inverter;
it should be noted that, the energy source of the photovoltaic power station is the sun, and under the condition that the conversion efficiency is close, the illumination condition largely determines the power generation amount of the photovoltaic module, and roughly, the illumination condition at any place on the earth has a periodic rule in units of years, so that data of the whole year is preferably read when the data is read, if the data is limited by the data amount, a longer periodic data set can be set by self, and it is recommended that the data is not less than three months, the data read at this place includes daily output power, and the rated capacity is the rated output capacity of the inverter, and the daily output power data set is divided by the rated capacity, so that the load rate corresponding to all the daily power of the target inverter can be obtained.
S200, dividing the load rate into load rate intervals with preset number, counting daily output electric quantity of an inverter corresponding to a target load rate interval, calculating actual capacity ratio according to installed capacity of a photovoltaic module corresponding to the target inverter and rated capacity of the target inverter, taking the actual capacity ratio as initial capacity ratio, updating the initial capacity ratio by using preset steps to obtain updated capacity ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
it should be noted that the installed capacity calculation method may be obtained by querying a database of the photovoltaic power station, and when the database does not have the data, the installed capacity calculation method may be obtained by calculation, and the calculation method includes: and selecting a target inverter, recording the photovoltaic modules for transmitting the electric energy to the target inverter and the corresponding nominal power, and taking the sum of the recorded nominal powers of all the photovoltaic modules as the installed capacity.
It is easy to understand that, because the power generation amount in different load intervals is greatly different, for example, in the morning and evening period or in the weather with poor illumination conditions, the power generation amount is extremely low, and at this time, even if the capacity ratio reaches the upper limit of the design specification, the full-distribution state cannot be reached, therefore, the load rate needs to be divided into load rate intervals in a preset range to select a proper interval for calculation, the selection of the interval has different selection modes according to the difference of the inverter, and also has different selection modes according to the difference of the super-distribution strategy, for example, when the super-distribution capability of the inverter is higher and the super-distribution strategy is active super-distribution, the selected load interval is lower, and the load rate which the inverter can reach in most of time can be selected.
It is worth to be noted that according to the conditions of the inverter and the super-distribution strategy, the selected range of the target load interval is wider during selection, and the purpose of increasing the generated energy through super-distribution is to enable more power generation time to fall into a high-load interval; the preset steps are set according to the photovoltaic modules, namely after the photovoltaic module with the smallest unit is added, the correspondingly increased volume ratio is the preset steps, and the preset steps can be obtained by increasing the preset steps for multiple times.
S300, calculating the increased power generation amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the daily output power amount of the inverter corresponding to the target load rate interval and the number of power generation days.
It is emphasized that after the ratio of the upgradable electric quantity to the initial capacity ratio is obtained, the super distribution of the photovoltaic power station can be guided, and the calculation of the power generation increasing quantity can perform deeper data analysis, such as investment recovery period, gain internal yield, leveling electric cost, fund profit margin and the like.
According to the technical scheme, the load rate is divided into the load rate intervals in the preset range in a mode of calculating the load rate of the inverter, the daily output electric quantity and the liftable electric quantity ratio of the inverter corresponding to the target load rate intervals are counted, the increased electric quantity is calculated finally, the increased electric quantity corresponding to each super-distribution optimization scheme in different capacity ratios can be displayed according to the power generation conditions of different photovoltaic modules after attenuation, the technical problems that in the prior art, data are difficult to obtain in the process of calculating the increased electric quantity through the photovoltaic modules, and the calculation complexity is high are solved, the technical effect that the super-distribution increased electric quantity of the inverter can be obtained without considering various complex conditions of the photovoltaic modules, the calculation accuracy of the increased electric quantity is improved to a certain extent, the calculation scheme is simplified, and the application range is widened.
Referring to fig. 2, fig. 2 is a schematic flow chart of another embodiment of the automatic task configuration method of the present invention, and the method for calculating the increased power generation amount of the photovoltaic power station provided by the present invention includes the following steps in addition to the above steps S100 to S300:
s110, reading a yearly daily output power data set and rated capacity of the target inverter from a database;
the daily output power is the output power at each moment of the day, and usually, data in the order of seconds, that is, the output power per second or per second, is recorded in a database, and the continuously recorded data is a daily output power set, and the daily output power data set includes all recorded times and corresponding time output power values every day throughout the year.
S120, carrying out standardized preprocessing on the annual daily output power data set and rated capacity of the target inverter, converting a plurality of data in all the daily output power data sets within a continuous preset time period into one data, and storing all the processed data into a data group;
it should be noted that there are many existing standardized pre-processing methods, the processing purpose of which is to convert the data stored in the database into data convenient for calculation, and the specific processing method needs to select the corresponding standardized processing method according to the type of the database, because the data of the daily output power set is huge, when performing extensive statistics, the excessively large data may cause unnecessary computation, and the original data may be lost due to transmission and storage problems, the situation of unstable collection frequency may exist, therefore, the total amount of data participating in later operation can be effectively reduced by converting the data set in a period of time into one data, the influence caused by unstable acquisition frequency can be effectively avoided, each parameter of each device is kept consistent in time period and data volume, and meanwhile, the interference of partial maximum values and partial minimum values is eliminated.
And S130, calculating the load rate of the target inverter according to the data group.
It is easy to understand that after converting data in a period of time into one data, the data can be used to represent the output power of the target inverter in the period of time, and then dividing by the rated capacity of the target inverter can obtain the load factor of the target inverter.
Specifically, the step of reading the annual daily output power dataset and the rated capacity of the target inverter from the database further includes:
and when the data loss rate of the target inverter is greater than a preset loss threshold value or the daily output power of continuous preset days is smaller than a preset power transmission threshold value, judging that the target inverter has a fault, finishing the calculation of the power increasing and generating capacity, and marking the data of the target inverter as fault data.
It should be noted that, if the data loss rate of the target inverter is greater than the preset loss threshold, it may be understood that the data of the target inverter is not correctly recorded, or the target inverter is repaired, maintained, replaced, or the power generation equipment where the inverter is located runs and has a fault, the historical data may not represent the real situation of the inverter, so that the corresponding calculation of the increased power generation amount is finished, and the inverter corresponding to the data is marked as the problem inverter, and the administrator may delete or modify the data according to the actual situation, in this embodiment, the preset loss threshold is 50%.
If the daily output power of the continuous preset days is smaller than the preset power transmission threshold, it can be understood that the power generation equipment where the inverter is located may have the problems of poor illumination conditions, serious photovoltaic module loss and the like due to long-time low-load operation, at the moment, the equipment needs to be repaired and replaced, and after the equipment is repaired or replaced, the referential performance of historical data is low, so that the historical data still needs to be marked so as to be convenient for a manager to further manage.
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:
wherein DatefiveThe converted data represents a data set with a preset time period as a time interval; date is second-level real-time data, t1And t2Respectively corresponding moments of the first group and the last group of data recorded in a preset time period; drfThe data acquisition frequency in the preset time period is set.
It should be noted that, the preset time period is 5 minutes, the total data acquisition amount in 5 minutes is counted and divided by the data acquisition frequency in 5 minutes to obtain relatively average data, and the accuracy of the data can be further improved by deleting outliers, however, since the number of data is large, the calculated amount of the data for deleting outliers is large, and in order to reduce the calculated amount and reduce the calculation time, the calculation requirement can be met only by using the above calculation method.
Specifically, the calculation method for obtaining the liftable power ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval includes:
wherein, γnN is the target load rate interval, xn,lAnd xn,hAnd respectively representing a boundary lower limit and a boundary upper limit corresponding to the target load rate interval n.
It is worth emphasizing that the target load interval has a wider range of choices in the selection according to the conditions of the inverter and the over-distribution strategy, and the over-distribution increases the power generation capacity with the aim of increasing the load rate in pursuit of the best economy, so that when x is xn,hWhen the upper boundary of the target load interval exceeds 100%, the overload load allowed by the inverter is not considered, the electric quantity ratio can be increased to 0 at the moment, and only x is obtainedn,hLess than or equal to 100%, there is a lifting space.
According to the method, the data accuracy is guaranteed by removing the fault inverter, meanwhile, the influence caused by unstable data acquisition frequency is effectively avoided by disclosing the judgment method of the fault inverter, each parameter of each device is kept consistent in time period and data volume, meanwhile, the interference of partial maximum value and partial minimum value is eliminated, the accuracy of data processing is further improved by a method for converting a public data set into single data and a calculation method capable of improving the electric quantity ratio, the technical scheme is perfected, the accuracy of calculation of the power generation increasing quantity is improved, the difficulty of data management is reduced by marking fault data corresponding to faults, and the use experience is improved.
Referring to fig. 3, fig. 3 is a flow chart of another embodiment of the task automatic configuration method of the present invention,
calculating the power increasing amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the daily output power amount of the inverter corresponding to the target load rate interval and the power generation days, and specifically comprises the following steps:
and comparing the ratio of the liftable electric quantity with the corresponding updated capacity ratio to obtain a load rate factor corresponding to the updated capacity ratio, and calculating the increased power generation quantity corresponding to the target load rate interval according to the load rate factor, the power generation quantity of the target load rate interval and the number of power generation days.
It should be noted that, the actual capacity ratio is greater than 100%, and the excess part is greater than or equal to the liftable power ratio, which needs to be distinguished from the case where the actual capacity ratio minus 100% is less than the liftable power ratio, so that a load factor needs to be added to distinguish between the two scenarios.
Specifically, the method for comparing the liftable electric quantity ratio with the corresponding actual capacity ratio comprises the following steps:
when gamma isn<RinvAt-1 time, αnTaking 1 when gamman≥RinvAt-1 time, αnTaking 0;
wherein, γnFor the liftable electric quantity ratio, αnIs the load factor, n is the target load interval, RinvIs prepared by volume ratio.
It is easy to understand that when the difference between the capacity ratio and the liftable power ratio is greater than 1, the power generation amount has a lifting space, so the load factor in the scene is 1, and when the difference between the capacity ratio and the liftable power ratio is less than or equal to 1, the power generation amount cannot be increased any more, so the load factor in the scene is 0.
Specifically, the method for calculating the increased power generation amount corresponding to the target load rate interval according to the load rate factor, the power generation amount of the target load rate interval and the power generation days comprises the following steps:
wherein E isnThe increased power generation amount corresponding to the load rate interval n; e.g. of the typei,dThe power generation amount of the load rate interval n in d days is obtained; alpha is alphanIs a load factor corresponding to a load factor interval n, and i is of all load factor intervalsAnd (4) a complete set.
It should be noted that, in the calculation formula of the present embodiment, the number of load days is set to 365 days, that is, one year, so as to obtain the increased power generation amount of the whole year, and the increased power generation amount calculation method counts the increased power generation amounts of all load intervals at one time in a multiple-set manner, thereby reducing the calculation steps.
Specifically, still include:
when the initial capacity ratio does not reach a preset upper limit value, taking the initial capacity ratio as a starting point, updating the capacity ratio of the target inverter by using preset steps, and calculating a load factor corresponding to the updated capacity ratio and a corresponding increased power generation amount;
it is easy to understand that the maximum allowable quantity of the preset upper limit value in a part of specific scenes can be 1.8 according to three types of illumination areas of photovoltaic power station design specification GB 50797, which is a safety standard in the industry, and the maximum allowable quantity upper limit can also be set by itself according to the field expandable condition, and in this embodiment, 1.8 is used as the capacity ratio upper limit value.
And when the updated capacity ratio reaches a preset upper limit value, storing all the updated capacity ratios and corresponding increased power generation quantity.
It should be noted that, after the capacity ratio of the target inverter is updated by using the preset step, if the updated capacity ratio is not consistent with the initial capacity ratio, the calculated increased power generation amount is also not consistent, and then after the capacity ratio is updated for multiple times, the updated capacity ratio reaches the preset upper limit value, all feasible capacity ratios and corresponding increased power generation amounts are calculated, and a proper capacity ratio can be selected through simple manual comparison.
Specifically, the power generation cost of the photovoltaic power station can be reduced by calculating the power generation increasing amount according to the data of the power generation increasing amount, the investment recovery period, the internal yield rate of increased capital, the electric cost of the levelness and the profit rate of capital fund of photovoltaic super distribution can be further calculated according to the relation between the capacity ratio and the super power generation amount, the super formula scheme which best meets the investment target can be obtained, the attenuation of all related indexes is considered, the specific attenuation value can be shown in a manufacturer specification, and the specific calculation formulas are respectively as follows:
the return on investment period R is not equal to or greater than m years and less than m +1 years, because the environmental conditions and the photovoltaic module itself have uncertainty, and the recoverable net investment flow rate per year varies, then:
r ═ m + funds that have not been withdrawn by year m/net cash flow for year (m +1)
The increase internal rate of return IRR, i.e. the discount rate when the total amount of the capital inflow present value is equal to the total amount of the capital outflow present value and the net present value is equal to zero, is calculated as follows:
IRR＝a+[NPVa/NPVa-NPVb]*(b-a)
wherein a and b are discount rates, the former is greater than the latter; NPVaAnd NPVbThe former is positive and the latter is negative, which are the net present values corresponding to the discount rates a and b.
The leveling electricity cost LCOE is calculated according to an international general algorithm in the following way:
wherein, Pdynamic,costThe construction cost comprises component investment cost, installation cost, component support, capital construction cost and the like;
the production cost caused by tax and asset depreciation in the life cycle is reduced;
the operation and maintenance cost;
the residual value and the current value of the fixed asset are obtained;
for current values of excess distribution of electric power, i.e. E according to the inventionn；
The annual capital fund profit rate ROE is calculated by the following formula:
ROE is the net profit/initial investment in the year.
According to the embodiment, the technical scheme is improved by disclosing a detailed calculation method, the working efficiency of the inverter is improved to a certain extent, meanwhile, the safety of the photovoltaic power station is guaranteed by introducing safety standards in the industry, the service life of the photovoltaic power station is prolonged, the effect of improving the power generation efficiency of the photovoltaic power station is achieved, the result can be visually displayed in a data form by calculating the power generation increasing amount, comparison and selection are facilitated, and the user experience is improved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the task automatic configuration device of the present invention, and the present invention further provides a photovoltaic power plant increased power generation amount calculation device, which includes:
the load rate calculation unit 10 is configured to read a daily output power dataset and a rated capacity of a target inverter from a database, and calculate a load rate of the target inverter according to the daily output power dataset and the rated capacity of the inverter all the year round;
the capacity-matching ratio and liftable electric quantity calculating unit 20 is used for dividing the load rate into a preset number of load rate intervals, counting the daily output electric quantity of the inverter corresponding to the target load rate interval, calculating the actual capacity-matching ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity-matching ratio as the initial capacity-matching ratio, updating the initial capacity-matching ratio by using preset steps to obtain the updated capacity-matching ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and the increased power generation amount calculation unit 30 is used for calculating the increased power generation amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the inverter daily output power amount corresponding to the target load rate interval and the power generation days.
The photovoltaic power station increased power generation amount calculation device provided by the embodiment of the invention can execute the photovoltaic power station increased power generation amount calculation method provided by any embodiment of the invention, has corresponding functional modules and beneficial effects of the execution method, and is not repeated herein.
As shown in fig. 5, fig. 5 is a schematic diagram of a server structure according to another embodiment of the present invention. The server comprises a processor 70, a memory 71, an input device 72 and an output device 73; the number of the processors 70 in the server may be one or more, and one processor 70 is taken as an example in fig. 5; the processor 70, the memory 71, the input device 72 and the output device 73 in the server may be connected by a bus or other means, and the bus connection is exemplified in fig. 5.
The memory 71 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions corresponding to the method for calculating the power increase of the photovoltaic power plant in the embodiment of the present invention. The processor 70 executes various functional applications and data processing of the server by running software programs, instructions and modules stored in the memory 71, so as to realize the photovoltaic power plant power increase calculation method.
The memory 71 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 71 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 71 may further include memory located remotely from processor 70, which may be connected to a server over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 72 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the server. The output device 73 may include a display server such as a display screen.
Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a method for calculating an increased power generation amount of a photovoltaic power plant, the method including:
reading a annual daily output power data set and rated capacity of a target inverter from a database, and calculating the load rate of the target inverter according to the annual daily output power data set and rated capacity of the inverter;
dividing the load rate into load rate intervals with preset quantity, counting the daily output electric quantity of the corresponding inverter in the target load rate interval, calculating the actual capacity ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity ratio as the initial capacity ratio, updating the initial capacity ratio by using preset steps to obtain the updated capacity ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and calculating the power increasing quantity corresponding to the target load rate interval according to the ratio of the liftable power quantity, the updated capacity ratio, the daily output power quantity of the inverter corresponding to the target load rate interval and the number of power generation days.
Specifically, the step of reading the annual daily output power data set of the inverter and the rated capacity thereof from the database, and calculating the load factor of the inverter according to the annual daily output power data set of the inverter and the rated capacity thereof specifically includes:
reading a yearly daily output power data set and rated capacity of the target inverter from a database;
carrying out standardized preprocessing on the annual daily output power data set and rated capacity of the target inverter, converting a plurality of data in all the daily output power data sets within a continuous preset time period into one data, and storing all the processed data into a data group;
and calculating the load rate of the target inverter according to the data group.
Specifically, the step of reading the annual daily output power dataset and the rated capacity of the target inverter from the database further includes:
and when the data loss rate of the target inverter is greater than a preset loss threshold value or the daily output power of continuous preset days is smaller than a preset power transmission threshold value, judging that the target inverter has a fault, finishing the calculation of the power increasing and generating capacity, and marking the data of the target inverter as fault data.
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:
wherein DatefiveThe converted data represents a data set with a preset time period as a time interval; date is second-level real-time data, t1And t2Respectively corresponding moments of the first group and the last group of data recorded in a preset time period; drfThe data acquisition frequency in the preset time period is set.
Specifically, the calculation method for obtaining the liftable power ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval includes:
wherein, γnN is the target load rate interval, xn,lAnd xn,hAnd respectively representing a boundary lower limit and a boundary upper limit corresponding to the target load rate interval n.
In particular, the amount of the solvent to be used,
calculating the power increasing amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the daily output power amount of the inverter corresponding to the target load rate interval and the power generation days, and specifically comprises the following steps:
and comparing the ratio of the liftable electric quantity with the corresponding updated capacity ratio to obtain a load rate factor corresponding to the updated capacity ratio, and calculating the increased power generation quantity corresponding to the target load rate interval according to the load rate factor, the power generation quantity of the target load rate interval and the number of power generation days.
Specifically, the method for comparing the scalable power ratio with the corresponding capacity ratio includes:
when gamma isn<RinvAt-1 time, αnTaking 1 when gamman≥RinvAt-1 time, αnTaking 0;
wherein, γnFor the liftable electric quantity ratio, αnIs the load factor, n is the target load interval, RinvIs prepared by volume ratio.
Specifically, the method for calculating the increased power generation amount corresponding to the target load rate interval according to the load rate factor, the power generation amount of the target load rate interval and the power generation days comprises the following steps:
wherein E isnThe increased power generation amount corresponding to the load rate interval n; e.g. of the typei,dThe power generation amount of the load rate interval n in d days is obtained; alpha is alphanAnd i is a load factor corresponding to the load rate interval n, and i is a complete set of all load rate intervals.
Specifically, the method further comprises the following steps:
when the initial volume ratio does not reach a preset upper limit value, taking the initial volume ratio as a starting point, updating the volume ratio of the target inverter by using preset steps, and calculating a load rate factor and an increased power generation amount of a target load rate interval corresponding to the updated volume ratio;
and when the updated capacity ratio reaches a preset upper limit value, storing all the updated capacity ratios and corresponding increased power generation quantity.
Certainly, the storage medium including the computer-executable instructions provided in the embodiment of the present invention is not limited to the method operations described above, and may also perform related operations in the method for calculating the power generation increase amount of the photovoltaic power plant provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the method for performing the operations, which are not described in detail herein.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for calculating the power generation increasing amount of a photovoltaic power station is characterized by comprising the following steps:
reading a annual daily output power data set and rated capacity of a target inverter from a database, and calculating the load rate of the target inverter according to the annual daily output power data set and rated capacity of the inverter;
dividing the load rate into load rate intervals with preset quantity, counting the daily output electric quantity of the corresponding inverter in the target load rate interval, calculating the actual capacity ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity ratio as the initial capacity ratio, updating the initial capacity ratio by using preset steps to obtain the updated capacity ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and calculating the power increasing quantity corresponding to the target load rate interval according to the ratio of the liftable power quantity, the updated capacity ratio, the daily output power quantity of the inverter corresponding to the target load rate interval and the number of power generation days.
2. The method for calculating the power generation increasing amount of the photovoltaic power station as claimed in claim 1, wherein the step of reading the daily output power data set of the inverter all the year around and the rated capacity thereof from the database, and calculating the load factor of the inverter according to the daily output power data set of the inverter all the year around and the rated capacity thereof specifically comprises the following steps:
reading a yearly daily output power data set and rated capacity of the target inverter from a database;
carrying out standardized preprocessing on the annual daily output power data set and rated capacity of the target inverter, converting a plurality of data in all the daily output power data sets within a continuous preset time period into one data, and storing all the processed data into a data group;
and calculating the load rate of the target inverter according to the data group.
3. The method according to claim 2, wherein the step of reading the daily output power data set and the rated capacity of the target inverter from the database further comprises:
and when the data loss rate of the target inverter is greater than a preset loss threshold value or the daily output power of continuous preset days is smaller than a preset power transmission threshold value, judging that the target inverter has a fault, finishing the calculation of the power increasing and generating capacity, and marking the data of the target inverter as fault data.
4. The method for calculating the power increasing capacity of the photovoltaic power station according to claim 1, wherein the calculating method for obtaining the ratio of the liftable power amount corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval comprises the following steps:
wherein, γnN is the target load rate interval, xn,lAnd xn,hAnd respectively representing a boundary lower limit and a boundary upper limit corresponding to the target load rate interval n.
5. The method for calculating the power generation increasing amount of the photovoltaic power station according to claim 1, wherein the step of calculating the power generation increasing amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the daily output power amount of the inverter corresponding to the target load rate interval, and the number of power generation days specifically comprises:
and comparing the ratio of the liftable electric quantity with the corresponding updated capacity ratio to obtain a load rate factor corresponding to the updated capacity ratio, and calculating the increased power generation quantity corresponding to the target load rate interval according to the load rate factor, the power generation quantity of the target load rate interval and the number of power generation days.
6. The method for calculating the power generation increasing amount of the photovoltaic power station according to claim 5, wherein the method for calculating the power generation increasing amount corresponding to the target load rate section according to the load rate factor, the power generation amount of the target load rate section and the number of power generation days comprises the following steps:
wherein E isnThe increased power generation amount corresponding to the load rate interval n; e.g. of the typei,dThe power generation amount of the load rate interval n in d days is obtained; alpha is alphanAnd i is a load factor corresponding to the load rate interval n, and i is a complete set of all load rate intervals.
7. The method for calculating the power increasing amount of the photovoltaic power plant according to claim 1, further comprising:
when the initial capacity ratio does not reach a preset upper limit value, taking the initial capacity ratio as a starting point, updating the capacity ratio of the target inverter by using preset steps, and calculating a load factor corresponding to the updated capacity ratio and a corresponding increased power generation amount;
and when the updated capacity ratio reaches a preset upper limit value, storing all the updated capacity ratios and corresponding increased power generation quantity.
8. The photovoltaic power station power generation amount increasing calculation device is characterized by comprising:
the load rate calculation unit is used for reading a daily output power data set and rated capacity of a target inverter all year round from a database and calculating the load rate of the target inverter according to the daily output power data set and the rated capacity of the inverter all year round;
the capacity-matching ratio and liftable electric quantity calculating unit is used for dividing the load rate into load rate intervals with preset quantity, counting the daily output electric quantity of the corresponding inverter in the target load rate interval, calculating the actual capacity-matching ratio according to the installed capacity of the photovoltaic module corresponding to the target inverter and the rated capacity of the target inverter, taking the actual capacity-matching ratio as the initial capacity-matching ratio, updating the initial capacity-matching ratio by using preset steps to obtain the updated capacity-matching ratio, and obtaining the liftable electric quantity ratio corresponding to the target load rate interval according to the boundary upper limit and the boundary lower limit of the target load rate interval;
and the power generation increasing amount calculation unit is used for calculating the power generation increasing amount corresponding to the target load rate interval according to the ratio of the liftable power amount, the updated capacity ratio, the corresponding daily output power amount of the inverter in the target load rate interval and the number of power generation days.
9. A server, characterized in that the server comprises: a memory, a processor, and a photovoltaic power plant power increase amount calculation program stored on the memory and executable on the processor, the photovoltaic power plant power increase amount calculation program, when executed by the processor, implementing the photovoltaic power plant power increase amount calculation method according to any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a photovoltaic power plant power increase amount calculation program that, when executed by a processor, implements the photovoltaic power plant power increase amount calculation method according to any one of claims 1 to 7.
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