CN114156864B - Photovoltaic inverter configuration method, device, terminal and storage medium - Google Patents

Photovoltaic inverter configuration method, device, terminal and storage medium Download PDF

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Publication number
CN114156864B
CN114156864B CN202111258335.XA CN202111258335A CN114156864B CN 114156864 B CN114156864 B CN 114156864B CN 202111258335 A CN202111258335 A CN 202111258335A CN 114156864 B CN114156864 B CN 114156864B
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photovoltaic
inverter
type
photovoltaic inverter
module
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CN114156864A (en
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吴建文
吴腾飞
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Xiamen Kehua Digital Energy Tech Co Ltd
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Xiamen Kecan Information Technology Co ltd
Kehua Data Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention provides a photovoltaic inverter configuration method, a photovoltaic inverter configuration device, a photovoltaic inverter terminal and a storage medium, wherein the photovoltaic inverter configuration method comprises the following steps: determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to parameters of the photovoltaic modules to be matched; determining a target photovoltaic inverter in a plurality of photovoltaic inverters of preset types according to the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter; determining a photovoltaic inverter required by each type of photovoltaic module in the target photovoltaic inverter, and obtaining a photovoltaic inverter configuration scheme according to the target string length of the photovoltaic inverter required by the access of each type of photovoltaic module and MPPT controller configuration parameters of the photovoltaic inverter required by the access of each type of photovoltaic module, wherein the photovoltaic inverter configuration scheme comprises types of the photovoltaic inverters required by the photovoltaic modules to be matched and the corresponding quantity of the photovoltaic inverters of each type. The configuration efficiency of the photovoltaic inverter can be improved.

Description

Photovoltaic inverter configuration method, device, terminal and storage medium
Technical Field
The present invention relates to the field of photovoltaic power generation technologies, and in particular, to a photovoltaic inverter configuration method, a photovoltaic inverter configuration device, a photovoltaic inverter terminal, and a photovoltaic power generation storage medium.
Background
Energy is an important pulse for the development of economy and society, is also an important support for the national development strategy, and the energy problem is increasingly highlighted along with the development of economy and society. The green new energy is an environment-friendly energy, meets the requirement of sustainable development, is one of the industries with the greatest potential in the field of new energy, and has high safety and continuously improved conversion efficiency.
Along with the continuous reduction of the cost of the photovoltaic power generation system, the photovoltaic power generation project formally enters the price-reduced age. The photovoltaic inverter is one of important equipment of a photovoltaic power generation system, the traditional photovoltaic inverter configuration method is generally manually selected and configured, the efficiency is low, and how to improve the configuration efficiency of the photovoltaic inverter is a technical problem which needs to be solved urgently in the prior art.
Disclosure of Invention
In view of the above, the invention provides a photovoltaic inverter configuration method, a photovoltaic inverter configuration device, a photovoltaic inverter configuration terminal and a photovoltaic inverter storage medium, which can solve the problem of low efficiency of obtaining a photovoltaic inverter configuration scheme in the prior art.
In a first aspect, an embodiment of the present invention provides a photovoltaic inverter configuration method, including:
determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to parameters of the photovoltaic modules to be matched, wherein the photovoltaic modules to be matched comprise at least one type of photovoltaic module;
Determining a target photovoltaic inverter from a plurality of preset types of photovoltaic inverters according to the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter, wherein the target photovoltaic inverter comprises at least one type of photovoltaic inverter;
determining a photovoltaic inverter required by each type of photovoltaic module in the target photovoltaic inverter, and obtaining a photovoltaic inverter configuration scheme according to the target string length of the photovoltaic inverter required by the access of each type of photovoltaic module and MPPT controller configuration parameters of the photovoltaic inverter required by the access of each type of photovoltaic module, wherein the photovoltaic inverter configuration scheme comprises the types of the photovoltaic inverters required by the photovoltaic modules to be matched and the corresponding quantity of the photovoltaic inverters of each type.
In one possible implementation manner, the determining, in the target photovoltaic inverter, the photovoltaic inverter required by each type of photovoltaic module, and obtaining the photovoltaic inverter configuration scheme according to the target string length of the photovoltaic inverter required by each type of photovoltaic module access and the required MPPT controller configuration parameters of the photovoltaic inverter, includes:
acquiring a photovoltaic inverter with the maximum power from the target photovoltaic inverter as a first photovoltaic inverter, and determining the number of the first photovoltaic inverters which are required to be configured most by each type of photovoltaic module according to the length of a target string of each type of photovoltaic module connected into the first photovoltaic inverter and the configuration parameter of an MPPT controller of the first photovoltaic inverter, so that the string length of each type of photovoltaic module connected into the first photovoltaic inverter is the length of the target string of each type of photovoltaic module connected into the first photovoltaic inverter;
If the residual photovoltaic modules exist, determining a corresponding second photovoltaic inverter for the photovoltaic module of any type in the target photovoltaic inverter according to the power of the residual photovoltaic modules and the power of the target photovoltaic inverter, so that all the residual photovoltaic modules of the type are connected into the corresponding second photovoltaic inverter of the type.
In one possible implementation manner, if there is a remaining photovoltaic module, determining, for any type of photovoltaic module, a corresponding second photovoltaic inverter for the type of photovoltaic module in the target photovoltaic inverter according to the power of the remaining photovoltaic module and the power of the target photovoltaic inverter includes:
sequentially calculating the residual power of each type of photovoltaic module, and sequencing according to the sequence from large to small to obtain a sequencing result;
executing a first adjustment configuration step: obtaining the residual total power of all types of photovoltaic modules, selecting a photovoltaic inverter with the system power closest to the residual total power from the target photovoltaic inverters according to the residual total power as a second photovoltaic inverter, and configuring the second photovoltaic inverter according to the sequencing result, wherein the photovoltaic module which is connected to the second photovoltaic inverter is connected to the target string length of the second photovoltaic inverter according to the requirement, and the configuration parameters of an MPPT controller of the second photovoltaic inverter;
And if the residual photovoltaic modules still exist, repeating the first configuration adjustment step until the residual photovoltaic modules are zero.
In one possible implementation manner, if there is a remaining photovoltaic module, determining, for any type of photovoltaic module, a corresponding second photovoltaic inverter for the type of photovoltaic module in the target photovoltaic inverter according to the power of the remaining photovoltaic module and the power of the target photovoltaic inverter includes:
calculating the residual power of each type of photovoltaic module in sequence;
performing a second adjustment configuration step: and for each type of photovoltaic module, determining a photovoltaic inverter closest to the type of residual power in the target photovoltaic inverter, taking the photovoltaic inverter as a second photovoltaic inverter corresponding to the type of photovoltaic module, and repeating the second configuration adjustment step until the type of residual photovoltaic module is zero.
In one possible implementation, the method further includes:
aiming at any type of photovoltaic module, dividing the maximum working voltage of the photovoltaic inverter required by the type of photovoltaic module by the working voltage of the type of photovoltaic module to obtain a first value;
dividing the open-circuit voltage of the photovoltaic inverter required by the type of photovoltaic module with the open-circuit voltage of the type of photovoltaic module to obtain a second value;
Acquiring a smaller value in the first value and the second value, and taking a positive integer which is smaller than the smaller value and is closest to the smaller value as the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access;
and obtaining a target string length of the photovoltaic inverter required by the type of photovoltaic module access according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access and a preset strategy, wherein the target string length is smaller than or equal to the maximum string length.
In one possible implementation, the method further includes:
for any type of photovoltaic module, determining a plurality of target string lengths according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module for access;
sequentially acquiring a photovoltaic inverter configuration scheme corresponding to the length of each target group string;
calculating the capacity ratio of the photovoltaic inverter configuration scheme corresponding to the length of each target group string in sequence;
and obtaining a photovoltaic inverter configuration scheme with the capacitance ratio in a preset numerical range.
In one possible implementation manner, the parameters of the photovoltaic modules to be matched include a type of the photovoltaic modules, a system voltage of each type of the photovoltaic modules, and a short-circuit current of each type of the photovoltaic modules, and determining, according to the parameters of the photovoltaic modules to be matched, a maximum system voltage and a minimum short-circuit current allowed by the photovoltaic inverter includes:
Determining the minimum value of the system voltage of each type of photovoltaic module as the maximum system voltage allowed by the photovoltaic inverter;
the maximum value of the short-circuit current of each type of photovoltaic module is determined as the minimum short-circuit current allowed by the photovoltaic inverter.
In a second aspect, an embodiment of the present invention provides a photovoltaic inverter configuration apparatus, including: the system comprises a photovoltaic inverter index determining module, a target photovoltaic inverter determining module and a configuration module;
the photovoltaic inverter index determining module is used for determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to parameters of the photovoltaic modules to be matched, wherein the photovoltaic modules to be matched comprise at least one type of photovoltaic modules;
the target photovoltaic inverter determining module is used for determining a target photovoltaic inverter in a plurality of preset types of photovoltaic inverters according to the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter, wherein the target photovoltaic inverter comprises at least one type of photovoltaic inverter;
the configuration module is used for determining the photovoltaic inverter required by each type of photovoltaic module in the target photovoltaic inverter, and obtaining a photovoltaic inverter configuration scheme according to the target string length of the photovoltaic inverter required by the access of each type of photovoltaic module and MPPT controller configuration parameters of the photovoltaic inverter required by the access of each type of photovoltaic module, wherein the photovoltaic inverter configuration scheme comprises the types of the photovoltaic inverters required by the photovoltaic modules to be matched and the corresponding quantity of the photovoltaic inverters of each type.
In a third aspect, embodiments of the present invention provide a terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to the first aspect or any one of the possible implementations of the first aspect, when the computer program is executed.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
according to the embodiment of the invention, the available photovoltaic inverter is determined through the parameters of the photovoltaic module to be matched, the target string length of the photovoltaic inverter required by each type of photovoltaic module is accessed to the photovoltaic module, and the configuration parameters of the MPPT controller of the photovoltaic inverter are required, so that the configuration scheme of the photovoltaic inverter of the photovoltaic module to be matched is directly obtained, and the configuration efficiency of the photovoltaic inverter is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an implementation of a photovoltaic inverter configuration method provided by an embodiment of the present invention;
fig. 2 is a flowchart of another implementation of a photovoltaic inverter configuration method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a photovoltaic inverter configuration device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of implementation of a photovoltaic inverter configuration method provided by an embodiment of the present invention is shown, and details are as follows:
in step 101, a maximum system voltage and a minimum short-circuit current allowed by the photovoltaic inverter are determined according to parameters of the photovoltaic modules to be matched, wherein the photovoltaic modules to be matched comprise at least one type of photovoltaic module.
The photovoltaic inverter described in the embodiments of the present invention may be a string inverter. In the string type inverter, each inverter is provided with one or more MPPT (Maximum Power Point Tracking ) controllers, and each MPPT controller typically has 1 or more inputs, i.e., one MPPT may connect 1 to 2 strings.
The configuration of each path of group string under the same path of MPPT must be the same, and the group string types of every two paths of MPPT connection under the same inverter can be the same or different.
In some embodiments, the parameters of the photovoltaic modules to be matched include a type of photovoltaic module, a system voltage of each type of photovoltaic module, and a short-circuit current of each type of photovoltaic module, and determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to the parameters of the photovoltaic modules to be matched includes:
Determining the minimum value of the system voltage of each type of photovoltaic module as the maximum system voltage allowed by the photovoltaic inverter; the maximum value of the short-circuit current of each type of photovoltaic module is determined as the minimum short-circuit current allowed by the photovoltaic inverter.
For example, the photovoltaic modules to be matched include three types, the parameters of which are shown in table 1 below:
TABLE 1
Name of the name Model number Power/number Number of pieces Operating voltage Open circuit voltage Short circuit current
Assembly A STH-210 210W 89 30.0 36.7 7A
Component B STH-250 250W 71 30.7 37.3 9A
Component C STH-350 350W 35 43.1 50.5 9A
The minimum system voltage of the three types of components is 600V according to the parameter table query of each type of photovoltaic components, and the maximum short-circuit current is 9A according to the table 1. The maximum system voltage allowed by the available photovoltaic inverter is 600V and the minimum short circuit current is 9A.
In step 102, a target photovoltaic inverter is determined from a plurality of preset types of photovoltaic inverters, the target photovoltaic inverter comprising at least one type of photovoltaic inverter, based on a maximum system voltage and a minimum short circuit current allowed by the photovoltaic inverter.
In the embodiment of the invention, according to the maximum system voltage and the minimum short-circuit current allowed by the available photovoltaic inverter obtained in the step 101, the available photovoltaic inverter is selected from the photovoltaic inverter list, and the target photovoltaic inverter is obtained.
In this step, description will be continued taking the photovoltaic module to be matched as an example of the photovoltaic module shown in table 1. Through the steps, the maximum system voltage allowed by the available photovoltaic inverter is 600V, the minimum short-circuit current is 9A, and the available photovoltaic inverter, namely the target photovoltaic inverter, is obtained from a plurality of photovoltaic inverters of preset types, such as a list or a library of the available photovoltaic inverters, wherein the available photovoltaic inverter comprises at least one type of photovoltaic inverter.
For example, the parameters of the resulting target photovoltaic inverter are shown in table 2 below.
TABLE 2
Name of the name Model number System power Operating voltage Open circuit voltage Short circuit current MPPT
Inverter 1 SPI6000-B2 6000W 100-550V 600V 13A (1，1)
Inverter 2 SPI5000-B2 5000W 100-550V 600V 13A (1，1)
Inverter 3 SPI4000-B2 4000W 100-550V 600V 13A (1，1)
Inverter 4 SPI3000-B2 3000W 100-550V 600V 13A (1)
In table 2, the configuration parameters of MPPT are explained as follows: (1, 1) represents two MPPT controllers, wherein each MPPT controller can be connected with one group string; (1) Representing one path of MPPT controller, and the path of MPPT controller can be connected with one path of group string.
Only the parameters of a part of the types of photovoltaic inverters are shown in table 2 above. For example, the MPPT configuration parameter of the available photovoltaic inverter may be (2, 1), which represents that the photovoltaic inverter has two MPPT controllers, the first MPPT controller may be connected to a 2-way string, and the second MPPT controller may be connected to a string.
The photovoltaic inverters listed in table 2 above are merely examples, and embodiments of the present invention are not limited to the type, parameters, etc. of photovoltaic inverter.
In step 103, determining a photovoltaic inverter required by each type of photovoltaic module in the target photovoltaic inverter, and obtaining a photovoltaic inverter configuration scheme according to the target string length of the photovoltaic inverter required by the access of each type of photovoltaic module and MPPT controller configuration parameters of the photovoltaic inverter required by the access of each type of photovoltaic module, wherein the photovoltaic inverter configuration scheme comprises types of the photovoltaic inverters required by the photovoltaic modules to be matched and the corresponding quantity of the photovoltaic inverters of each type.
In the embodiment of the invention, the string length refers to the number of one photovoltaic module accessed by one MPPT controller.
The target string length refers to the preferred length of the photovoltaic module connected to the photovoltaic inverter in the actual configuration process, for example, according to table 1 and table 2, the target string length of the module a connected to the inverter 1 may be set to 15, i.e. one input of one MPPT controller is connected to 15 modules a.
In some embodiments, the photovoltaic inverters required by each type of module may be allocated to each type of module according to the power of each module, or the photovoltaic inverters required by each type of module may be allocated to each type of module according to the target string length of the module connected to each type of photovoltaic inverter. And when the target string length of the photovoltaic inverter required by the access of each type of photovoltaic module and the required MPPT controller configuration parameters of the photovoltaic inverter are determined, obtaining a photovoltaic inverter configuration scheme.
In some embodiments, the embodiments of the present invention determine a target string length of a photovoltaic inverter required for photovoltaic module access by:
aiming at any type of photovoltaic module, dividing the maximum working voltage of the photovoltaic inverter required by the type of photovoltaic module by the working voltage of the type of photovoltaic module to obtain a first value; dividing the open-circuit voltage of the photovoltaic inverter required by the type of photovoltaic module with the open-circuit voltage of the type of photovoltaic module to obtain a second value; acquiring a smaller value of the first value and the second value, and taking a positive integer which is smaller than the smaller value and closest to the smaller value as the maximum string length of the photovoltaic inverter required by the access of the type of photovoltaic module; and obtaining the target string length of the photovoltaic inverter required by the type of photovoltaic module access according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access and a preset strategy, wherein the target string length is smaller than or equal to the maximum string length.
In the above tables 1 and 2, taking the photovoltaic module a as an example to be connected to the inverter 1, the maximum operating voltage of the inverter 1 is 550V, the operating voltage of the photovoltaic module a is 30V, the first value is 18.33 obtained by dividing the operating voltage, the open circuit voltage of the inverter 1 is 600V, the open circuit voltage of the module a is 36.7V, the second value is 16.35 obtained by dividing the open circuit voltage of the module a, the smaller value of the first value and the second value is 16.35, the positive integer closest to 16.35 and smaller than 16.35 is 16, and the maximum string length of the module a connected to the inverter 1 is 16.
16 is the maximum length of a string of components a that is connected to the inverter 1, and one input of one MPPT of the inverter 1 is connected to a maximum of 16 components a. The optimal length of a string of components a accessing the inverter 1 may be different in different application scenarios. In the embodiment of the invention, after the maximum string length is obtained, the target string length is obtained according to a preset strategy. If the preset strategy is the maximum string length minus 1, the target string length of the component a accessing the inverter 1 is 15, and if the preset strategy is the maximum string length minus 2, the target string length of the component a accessing the inverter 1 is 14, which is not limited in the embodiment of the present invention.
In a possible implementation manner, the method provided by the embodiment of the invention further includes:
for any type of photovoltaic module, determining a plurality of target string lengths according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module for access; sequentially acquiring a photovoltaic inverter configuration scheme corresponding to the length of each target group string; calculating the capacity ratio of the photovoltaic inverter configuration scheme corresponding to the length of each target group string in sequence; and obtaining a photovoltaic inverter configuration scheme with the capacitance ratio in a preset numerical range.
For example, according to the above method, the maximum group string length of the component a accessing the inverter 1 is 16, the maximum group string length of the component B accessing the inverter 1 is 16, and the maximum group string length of the component C accessing the inverter 1 is 11 based on the same algorithm. In combination with table 2, since the maximum operating voltages of the inverters 1 to 4 are the same, and the open circuit voltages are also the same, the maximum lengths of the component a accessing the inverters 1 to 4 are all 16, the maximum group string lengths of the component B accessing the inverters 1 to 4 are all 16, and the maximum group string lengths of the component C accessing the inverters 1 to 4 are all 11.
If the target string length of the string a connected to the inverters 1 to 4 is 16, the target string length of the string B connected to the inverters 1 to 4 is 16, and the target string length of the string C connected to the inverters 1 to 4 is 11, a configuration scheme corresponding to a value of the capacity ratio is obtained by the method, and the configuration scheme is assumed to be the capacity ratio 1;
if the target string length of the string a connected to the inverters 1 to 4 is 15, the target string length of the string B connected to the inverters 1 to 4 is 15, and the target string length of the string C connected to the inverters 1 to 4 is 10, a configuration scheme corresponding to a value of the capacity ratio is obtained by the method, and the configuration scheme is assumed to be the capacity ratio 2;
If the target string length of the string a connected to the inverters 1 to 4 is 14, the target string length of the string B connected to the inverters 1 to 4 is 14, and the target string length of the string C connected to the inverters 1 to 4 is 9, a configuration scheme corresponding to a value of the capacity ratio, which is assumed to be the capacity ratio 3, is obtained by the above method.
Three schemes can be obtained, and the photovoltaic inverter configuration scheme with the capacity ratio in a preset numerical range is obtained according to application scenes, project requirements and the like and pushed to a user.
The preset numerical range may be set according to an actual application scenario, a project requirement, and the like, which is not limited in the embodiment of the present invention.
Further, an embodiment of the present invention further provides a photovoltaic inverter configuration method, with reference to fig. 2, including:
s1031, acquiring a photovoltaic inverter with the maximum power from a target photovoltaic inverter as a first photovoltaic inverter, and determining the number of the first photovoltaic inverters which are required to be configured most by each type of photovoltaic module according to the length of a target string of each type of photovoltaic module connected into the first photovoltaic inverter and the configuration parameters of an MPPT controller of the first photovoltaic inverter, so that the string length of each type of photovoltaic module connected into the first photovoltaic inverter is the length of the target string of each type of photovoltaic module connected into the first photovoltaic inverter;
S1032, if the residual photovoltaic module exists, determining a corresponding second photovoltaic inverter for the photovoltaic module of the type in the target photovoltaic inverter according to the power of the residual photovoltaic module and the power of the target photovoltaic inverter, so that all the residual photovoltaic modules of the type are connected into the corresponding second photovoltaic inverter of the type.
In some embodiments, step S1032 may be implemented by:
sequentially calculating the residual power of each type of photovoltaic module, and sequencing according to the sequence from large to small to obtain a sequencing result; executing a first adjustment configuration step: the method comprises the steps of obtaining the residual total power of all types of photovoltaic modules, selecting a photovoltaic inverter with the system power closest to the residual total power from target photovoltaic inverters according to the residual total power as a second photovoltaic inverter, accessing the photovoltaic module of the second photovoltaic inverter to the target string length of the second photovoltaic inverter according to the requirement, and configuring the second photovoltaic inverter according to the sequencing result, wherein the photovoltaic module of the second photovoltaic inverter is connected to the target string length of the second photovoltaic inverter; and if the residual photovoltaic modules still exist, repeating the first adjustment configuration step until the residual photovoltaic modules are zero.
The embodiments of the present invention are described with reference to a specific example. Referring to fig. 1 and 2, the photovoltaic modules to be matched are those shown in table 1. In combination with the above steps, the target photovoltaic inverter of the photovoltaic module in table 1 was obtained as the photovoltaic inverter in table 2.
In the first round of configuration, in combination with step S1031, the photovoltaic inverter with the largest power is obtained, that is, the inverter 1 is used as the first photovoltaic inverter, the inverter 1 has two paths of MPPT controllers, and each path of MPPT controller can be connected into one path group string.
As can be seen from the above steps, the maximum string length of the string a to the inverter 1 is 16, the maximum string length of the string B to the inverter 1 is 16, and the maximum string length of the string C to the inverter 1 is 11. Assuming that the preset strategy is that the maximum string length is reduced by 1 to obtain the target string length, the target string length of the string a connected to the inverter 1 is 15, the target string length of the string B connected to the inverter 1 is 15, and the target string length of the string C connected to the inverter 1 is 10.
When the configuration is performed with the target string length of each type of photovoltaic module, the number of the 1 inverters 1 capable of being connected to the module a is 30, the number of the 1 inverters 1 capable of being connected to the module B is 30, and the number of the 1 inverters 1 capable of being connected to the module C is 20.
The number of first photovoltaic inverters needed by the photovoltaic modules a is 2, the number of the inverters 1 is 89-30×2=29 modules a, the number of the first photovoltaic inverters needed by the modules B is 2, the number of the inverters 1 is 71-30×2=11 modules B, the number of the first photovoltaic inverters needed by the modules C is 1, and the number of the modules C is 35-2*1 =15.
And counting the rest photovoltaic modules, wherein 29 modules A and 11 modules B and 15 modules C are remained.
The remaining power of each type of photovoltaic module was calculated in sequence and sorted in order from large to small, resulting in the sorting results shown in table 3 below:
TABLE 3 Table 3
Name of the name Number of residues Residual power
Assembly A 29 6090W
Component C 15 5250W
Component B 11 2750W
And acquiring the total power of the photovoltaic modules of all types as 14090W, selecting the photovoltaic inverter with the closest system power and total power of the photovoltaic modules as a second photovoltaic inverter from the target photovoltaic inverters according to the total power of the photovoltaic modules, selecting the inverter 1 from the table 2, and firstly configuring the module A according to the sequencing result.
One path of MPPT of the inverter 1 is connected with 15 assemblies A, the other path of MPPT is connected with 14 assemblies A, and the configuration of the assemblies A is completed.
If there are still remaining components B and C, statistics are again performed, and the statistics result is shown in table 4 below:
TABLE 4 Table 4
Name of the name Number of residues Residual power
Component C 15 5250W
Component B 11 2750W
And selecting a photovoltaic inverter with the nearest system power and the total residual power from the target photovoltaic inverters as a second photovoltaic inverter according to the total residual power, wherein the total residual power is 5250+2750=8000W, selecting an inverter 1 through a table 2, and firstly configuring the component C according to the sequencing result.
One path of MPPT of the inverter 1 is connected with 10 assemblies C, the other path of MPPT is connected with 5 assemblies C, and the configuration of the assemblies C is completed.
There are still remaining components B, again counted, the statistics are shown in table 5:
TABLE 5
Name of the name Number of residues Residual power
Component B 11 2750W
And selecting a photovoltaic inverter with the nearest system power and the total power as a second photovoltaic inverter from the target photovoltaic inverters according to the total power of 2750W, selecting an inverter 4 according to the table 2, and configuring the component B.
The inverter 4 has one MPPT, is connected with a group string, the length of the target group string of the component B connected with the inverter is 15, and the rest 11 components B are all connected with the inverter 4.
All the rest components are configured so as to obtain a photovoltaic inverter configuration scheme: 7 inverters 1 and 1 inverter 3.
In some embodiments, step S1032 may be implemented by:
Calculating the residual power of each type of photovoltaic module in sequence, and executing a second adjustment configuration step: and for each type of photovoltaic module, determining a photovoltaic inverter closest to the type of residual power in the target photovoltaic inverter, taking the photovoltaic inverter as a second photovoltaic inverter corresponding to the type of photovoltaic module, and repeating the second configuration adjustment step until the type of residual photovoltaic module is zero.
As can be seen from the above description, in the first round of configuration, in combination with step S1031, the number of the 1 inverters 1 capable of accessing the module a is 30, the number of the 1 inverters 1 capable of accessing the module B is 30, and the number of the 1 inverters 1 capable of accessing the module C is 20 when configured with the target string length of each type of photovoltaic module.
The number of first photovoltaic inverters needed by the photovoltaic modules a is 2, the number of the inverters 1 is 89-30×2=29 modules a, the number of the first photovoltaic inverters needed by the modules B is 2, the number of the inverters 1 is 71-30×2=11 modules B, the number of the first photovoltaic inverters needed by the modules C is 1, and the number of the modules C is 35-2*1 =15.
And if the residual photovoltaic modules exist, calculating the residual power of each type of photovoltaic module in sequence:
The number of the components A is 29, and the residual power is 6090W;
the number of the components B is 11, and the residual power is 2750W;
component C has 15 remaining, remaining power 5250W.
And executing a second adjustment configuration step, determining a photovoltaic inverter closest to the residual power of the type in the target photovoltaic inverter for each type of photovoltaic module, and repeating the second adjustment configuration step until the residual photovoltaic module of the type is zero as a second photovoltaic inverter corresponding to the type of photovoltaic module.
And combining table 2, wherein the second photovoltaic inverter corresponding to the component A is an inverter 1, one path of MPPT of the inverter 1 is connected with 15 components A, the other path of MPPT is connected with 14 components A, and the configuration of the components A is completed.
The second photovoltaic inverter corresponding to the component B is an inverter 4, the inverter 4 is provided with one path of MPPT, one group string is connected, the length of the target group string of the component B connected with the inverter is 15, and the rest 11 components B are all connected with the inverter 4.
The second photovoltaic inverter corresponding to the component C is an inverter 2, the inverter 2 is provided with two MPPT paths, one MPPT path of the inverter 2 is connected with 10 components C, the other MPPT path of the inverter 2 is connected with 5 components C, and the configuration of the components C is completed.
All the rest components are configured so as to obtain a photovoltaic inverter configuration scheme: 6 inverters 1, 1 inverter 2, and 1 inverter 3.
According to the embodiment of the invention, the available photovoltaic inverter is determined through the parameters of the photovoltaic module to be matched, the target string length of the photovoltaic inverter required by each type of photovoltaic module is accessed to the photovoltaic module, and the configuration parameters of the MPPT controller of the photovoltaic inverter are required, so that the configuration scheme of the photovoltaic inverter of the photovoltaic module to be matched is directly obtained, and the configuration efficiency of the photovoltaic inverter is improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 3 is a schematic structural diagram of a photovoltaic inverter configuration device according to an embodiment of the present invention, and for convenience of explanation, only a portion related to the embodiment of the present invention is shown, which is described in detail below:
as shown in fig. 3, the photovoltaic inverter configuration apparatus 3 includes: a photovoltaic inverter index determination module 31, a target photovoltaic inverter determination module 32, and a configuration module 33;
The photovoltaic inverter index determining module 31 is configured to determine a maximum system voltage and a minimum short-circuit current allowed by the photovoltaic inverter according to parameters of a photovoltaic module to be matched, where the photovoltaic module to be matched includes at least one type of photovoltaic module;
a target photovoltaic inverter determination module 32 configured to determine a target photovoltaic inverter among a plurality of preset types of photovoltaic inverters according to a maximum system voltage and a minimum short-circuit current allowed by the photovoltaic inverter, the target photovoltaic inverter including at least one type of photovoltaic inverter;
the configuration module 33 is configured to determine a photovoltaic inverter required by each type of photovoltaic module in the target photovoltaic inverter, and obtain a photovoltaic inverter configuration scheme according to a target string length of the photovoltaic inverter required by each type of photovoltaic module access and an MPPT controller configuration parameter of the photovoltaic inverter required by each type of photovoltaic module, where the photovoltaic inverter configuration scheme includes types of photovoltaic inverters required by the photovoltaic modules to be matched and numbers corresponding to each type of photovoltaic inverter.
In some embodiments, the configuration module 33 is to:
acquiring a photovoltaic inverter with the maximum power as a first photovoltaic inverter, and determining the number of the first photovoltaic inverters which are required to be configured at most for each type of photovoltaic module according to the target string length of each type of photovoltaic module connected into the first photovoltaic inverter and the configuration parameter of an MPPT controller of the first photovoltaic inverter, so that the string length of each type of photovoltaic module connected into the first photovoltaic inverter is the target string length of each type of photovoltaic module connected into the first photovoltaic inverter;
If the residual photovoltaic modules exist, determining a corresponding second photovoltaic inverter for the photovoltaic module of any type in the target photovoltaic inverter according to the power of the residual photovoltaic modules and the power of the target photovoltaic inverter, so that all the residual photovoltaic modules of the type are connected into the corresponding second photovoltaic inverter of the type.
In some embodiments, the configuration module 33 is to:
sequentially calculating the residual power of each type of photovoltaic module, and sequencing according to the sequence from large to small to obtain a sequencing result;
executing a first adjustment configuration step: obtaining the residual total power of all types of photovoltaic modules, selecting a photovoltaic inverter with the system power closest to the residual total power from the target photovoltaic inverters according to the residual total power as a second photovoltaic inverter, and configuring the second photovoltaic inverter according to the sequencing result, wherein the photovoltaic module which is connected to the second photovoltaic inverter is connected to the target string length of the second photovoltaic inverter according to the requirement, and the configuration parameters of an MPPT controller of the second photovoltaic inverter;
and if the residual photovoltaic modules still exist, repeating the first configuration adjustment step until the residual photovoltaic modules are zero.
In some embodiments, the configuration module 33 is configured to calculate the remaining power of each type of photovoltaic module in turn;
performing a second adjustment configuration step: and for each type of photovoltaic module, determining a photovoltaic inverter closest to the type of residual power in the target photovoltaic inverter, taking the photovoltaic inverter as a second photovoltaic inverter corresponding to the type of photovoltaic module, and repeating the second configuration adjustment step until the type of residual photovoltaic module is zero.
In some embodiments, the configuration module 33 is to:
aiming at any type of photovoltaic module, dividing the maximum working voltage of the photovoltaic inverter required by the type of photovoltaic module by the working voltage of the type of photovoltaic module to obtain a first value;
dividing the open-circuit voltage of the photovoltaic inverter required by the type of photovoltaic module with the open-circuit voltage of the type of photovoltaic module to obtain a second value;
acquiring a smaller value in the first value and the second value, and taking a positive integer which is smaller than the smaller value and is closest to the smaller value as the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access;
and obtaining a target string length of the photovoltaic inverter required by the type of photovoltaic module access according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access and a preset strategy, wherein the target string length is smaller than or equal to the maximum string length.
In some embodiments, the configuration module 33 is to:
for any type of photovoltaic module, determining a plurality of target string lengths according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module for access;
sequentially acquiring a photovoltaic inverter configuration scheme corresponding to the length of each target group string;
calculating the capacity ratio of the photovoltaic inverter configuration scheme corresponding to the length of each target group string in sequence;
and obtaining a photovoltaic inverter configuration scheme with the capacitance ratio in a preset numerical range.
In some embodiments, the photovoltaic inverter index determination module 31 is to:
determining the minimum value of the system voltage of each type of photovoltaic module as the maximum system voltage allowed by the photovoltaic inverter;
the maximum value of the short-circuit current of each type of photovoltaic module is determined as the minimum short-circuit current allowed by the photovoltaic inverter.
According to the embodiment of the invention, the available photovoltaic inverter is determined through the parameters of the photovoltaic module to be matched, the target string length of the photovoltaic inverter required by each type of photovoltaic module is accessed to the photovoltaic module, and the configuration parameters of the MPPT controller of the photovoltaic inverter are required, so that the configuration scheme of the photovoltaic inverter of the photovoltaic module to be matched is directly obtained, and the configuration efficiency of the photovoltaic inverter is improved.
The photovoltaic inverter configuration device provided in this embodiment may be used to execute the above photovoltaic inverter configuration method embodiment, and its implementation principle and technical effects are similar, and this embodiment is not repeated here.
Fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 4, the terminal 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in the memory 41 and executable on the processor 40. The steps of the above-described embodiments of the photovoltaic inverter configuration method, such as steps 101 through 103 shown in fig. 1, are implemented by the processor 40 when executing the computer program 42. Alternatively, the processor 40, when executing the computer program 42, performs the functions of the modules/units of the apparatus embodiments described above, such as the functions of the modules 31 to 33 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program 42 in the terminal 4.
The terminal 4 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal 4 may include, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the terminal 4 and is not limiting of the terminal 4, and may include more or fewer components than shown, or may combine some components, or different components, e.g., the terminal may further include input and output devices, network access devices, buses, etc.
The processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or a memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used for storing the computer program as well as other programs and data required by the terminal. The memory 41 may also be used for temporarily storing data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each of the photovoltaic inverter configuration method embodiments described above when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims (9)

1. A photovoltaic inverter configuration method, comprising:
determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to parameters of the photovoltaic modules to be matched, wherein the photovoltaic modules to be matched comprise at least one type of photovoltaic module;
determining a target photovoltaic inverter from a plurality of preset types of photovoltaic inverters according to the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter, wherein the target photovoltaic inverter comprises at least one type of photovoltaic inverter;
acquiring a photovoltaic inverter with the maximum power from the target photovoltaic inverter as a first photovoltaic inverter, and determining the number of the first photovoltaic inverters which are required to be configured most by each type of photovoltaic module according to the length of a target string of each type of photovoltaic module connected into the first photovoltaic inverter and the configuration parameter of an MPPT controller of the first photovoltaic inverter, so that the string length of each type of photovoltaic module connected into the first photovoltaic inverter is the length of the target string of each type of photovoltaic module connected into the first photovoltaic inverter;
If the residual photovoltaic modules exist, determining a corresponding second photovoltaic inverter for the photovoltaic module of any type in the target photovoltaic inverter according to the power of the residual photovoltaic modules and the power of the target photovoltaic inverter, so that all the residual photovoltaic modules of the type are connected into the corresponding second photovoltaic inverter of the type.
2. The method of claim 1, wherein determining, for any type of photovoltaic module, a corresponding second photovoltaic inverter for that type of photovoltaic module in the target photovoltaic inverter based on the power of the remaining photovoltaic module and the power of the target photovoltaic inverter, if any, comprises:
sequentially calculating the residual power of each type of photovoltaic module, and sequencing according to the sequence from large to small to obtain a sequencing result;
executing a first adjustment configuration step: obtaining the residual total power of all types of photovoltaic modules, selecting a photovoltaic inverter with the system power closest to the residual total power from the target photovoltaic inverters according to the residual total power as a second photovoltaic inverter, and configuring the second photovoltaic inverter according to the sequencing result, wherein the photovoltaic module which is connected to the second photovoltaic inverter is connected to the target string length of the second photovoltaic inverter according to the requirement, and the configuration parameters of an MPPT controller of the second photovoltaic inverter;
And if the residual photovoltaic modules still exist, repeating the first configuration adjustment step until the residual photovoltaic modules are zero.
3. The method of claim 1, wherein determining, for any type of photovoltaic module, a corresponding second photovoltaic inverter for that type of photovoltaic module in the target photovoltaic inverter based on the power of the remaining photovoltaic module and the power of the target photovoltaic inverter, if any, comprises:
calculating the residual power of each type of photovoltaic module in sequence;
performing a second adjustment configuration step: and for each type of photovoltaic module, determining a photovoltaic inverter closest to the type of residual power in the target photovoltaic inverter, taking the photovoltaic inverter as a second photovoltaic inverter corresponding to the type of photovoltaic module, and repeating the second configuration adjustment step until the type of residual photovoltaic module is zero.
4. A method according to any one of claims 1 to 3, further comprising:
aiming at any type of photovoltaic module, dividing the maximum working voltage of the photovoltaic inverter required by the type of photovoltaic module by the working voltage of the type of photovoltaic module to obtain a first value;
Dividing the open-circuit voltage of the photovoltaic inverter required by the type of photovoltaic module with the open-circuit voltage of the type of photovoltaic module to obtain a second value;
acquiring a smaller value in the first value and the second value, and taking a positive integer which is smaller than the smaller value and is closest to the smaller value as the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access;
and obtaining a target string length of the photovoltaic inverter required by the type of photovoltaic module access according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module access and a preset strategy, wherein the target string length is smaller than or equal to the maximum string length.
5. The method of claim 4, further comprising:
for any type of photovoltaic module, determining a plurality of target string lengths according to the maximum string length of the photovoltaic inverter required by the type of photovoltaic module for access;
sequentially acquiring a photovoltaic inverter configuration scheme corresponding to the length of each target group string;
calculating the capacity ratio of the photovoltaic inverter configuration scheme corresponding to the length of each target group string in sequence;
and obtaining a photovoltaic inverter configuration scheme with the capacitance ratio in a preset numerical range.
6. A method according to any one of claims 1 to 3, wherein the parameters of the photovoltaic modules to be matched include the type of photovoltaic module, the system voltage of each type of photovoltaic module, the short-circuit current of each type of photovoltaic module, and wherein determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to the parameters of the photovoltaic modules to be matched comprises:
determining the minimum value of the system voltage of each type of photovoltaic module as the maximum system voltage allowed by the photovoltaic inverter;
the maximum value of the short-circuit current of each type of photovoltaic module is determined as the minimum short-circuit current allowed by the photovoltaic inverter.
7. The photovoltaic inverter configuration device is characterized by comprising a photovoltaic inverter index determination module, a target photovoltaic inverter determination module and a configuration module;
the photovoltaic inverter index determining module is used for determining the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter according to parameters of the photovoltaic modules to be matched, wherein the photovoltaic modules to be matched comprise at least one type of photovoltaic modules;
the target photovoltaic inverter determining module is used for determining a target photovoltaic inverter in a plurality of preset types of photovoltaic inverters according to the maximum system voltage and the minimum short-circuit current allowed by the photovoltaic inverter, wherein the target photovoltaic inverter comprises at least one type of photovoltaic inverter;
The configuration module is used for acquiring a photovoltaic inverter with the largest power from the target photovoltaic inverter as a first photovoltaic inverter, and determining the number of the first photovoltaic inverters which are required to be configured at most for each type of photovoltaic module according to the length of a target string of each type of photovoltaic module connected into the first photovoltaic inverter and the configuration parameter of an MPPT controller of the first photovoltaic inverter, so that the string length of each type of photovoltaic module connected into the first photovoltaic inverter is the length of the target string of each type of photovoltaic module connected into the first photovoltaic inverter; if the residual photovoltaic modules exist, determining a corresponding second photovoltaic inverter for the photovoltaic module of any type in the target photovoltaic inverter according to the power of the residual photovoltaic modules and the power of the target photovoltaic inverter, so that all the residual photovoltaic modules of the type are connected into the corresponding second photovoltaic inverter of the type.
8. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of the preceding claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any of the preceding claims 1 to 6.
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