CN116454949A - Intelligent control system for light storage charge and discharge - Google Patents
Intelligent control system for light storage charge and discharge Download PDFInfo
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- CN116454949A CN116454949A CN202310421298.2A CN202310421298A CN116454949A CN 116454949 A CN116454949 A CN 116454949A CN 202310421298 A CN202310421298 A CN 202310421298A CN 116454949 A CN116454949 A CN 116454949A
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- 238000004146 energy storage Methods 0.000 claims abstract description 347
- 238000010248 power generation Methods 0.000 claims abstract description 133
- 238000004458 analytical method Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 56
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 230000001276 controlling effect Effects 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims description 37
- 238000012544 monitoring process Methods 0.000 claims description 27
- 238000012937 correction Methods 0.000 claims description 24
- 238000011156 evaluation Methods 0.000 claims description 14
- 210000001061 forehead Anatomy 0.000 claims description 12
- 238000012806 monitoring device Methods 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 208000028659 discharge Diseases 0.000 description 86
- 230000005611 electricity Effects 0.000 description 8
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- 238000005286 illumination Methods 0.000 description 3
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Classifications
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- 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
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- 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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the field of intelligent control of optical storage charge and discharge, and particularly discloses an intelligent control system of optical storage charge and discharge, which is used for analyzing and obtaining proper charge current and proper charge voltage of energy storage equipment through basic information of power generation equipment, so as to regulate and control charge parameters and charge duration of the energy storage equipment, ensure the stability and safety of charging of the energy storage equipment and prevent overcharge; regulating and controlling the discharge parameters and the discharge time of the energy storage equipment through the basic information of the electric equipment, so that the discharge of the energy storage equipment is in a stable state, and overdischarge is prevented; the method comprises the steps of obtaining operation information of the energy storage equipment in a historical period, analyzing to obtain a performance attenuation coefficient of the energy storage equipment, further analyzing the reference residual service life of the energy storage equipment, analyzing the performance loss of the energy storage equipment by combining a plurality of indexes, further estimating the residual service life of the energy storage equipment, and improving the accuracy of analysis results.
Description
Technical Field
The invention relates to the field of intelligent control of optical storage charge and discharge, in particular to an intelligent control system of optical storage charge and discharge.
Background
The working principle of the solar photovoltaic power generation system is that a solar photovoltaic panel generates power for a user to use when illumination exists, redundant electric quantity is stored in an energy storage device, and photovoltaic electricity and stored energy electricity can be cooperated to charge charging equipment, and when the photovoltaic electricity and stored energy do not exist, mains supply is called to provide electric energy for the user.
Because solar energy has randomness and intermittence, the solar photovoltaic power generation system is required to realize continuous and stable power supply, and the energy storage device plays a very important role, so that the charge and discharge efficiency of the energy storage device is improved, the service life of the energy storage device is prolonged, and the charge and discharge of the energy storage device are required to be controlled and managed.
The existing energy storage device charge and discharge management method has some defects: on one hand, when the charging process of the energy storage equipment is controlled, the existing method mainly controls the charging time of the energy storage equipment, prevents overcharge, and lacks regulation and control of electric power parameters of the charging of the energy storage equipment, such as charging voltage, charging current and the like, wherein the service life of the energy storage equipment can be influenced by the fact that the charging current is too large or too small, the physical damage of the energy storage equipment is caused by the fact that the charging voltage is too high, and the shortage of the charging of the energy storage equipment is caused by the fact that the charging voltage is too low; meanwhile, due to the limitation, randomness and intermittence of the photovoltaic electric energy, fluctuation and change of the electric power parameters of the photovoltaic power generation exist, and in order to ensure the stability and safety of the charging process of the energy storage equipment, the electric power parameters of the charging of the energy storage equipment are required to be regulated in a following way instead of being set to be a fixed value.
On one hand, when the existing method is used for controlling the discharging process of the energy storage device, the discharging electric quantity of the energy storage device is mainly controlled, overdischarge is prevented, analysis of the electric power parameters of the discharging process of the energy storage device, such as discharging current, discharging power and the like, is lacked, and the electric power parameters of the discharging of the energy storage device are correspondingly regulated and controlled due to the diversity of loads and the combination of the characteristics of the loads, so that the discharging of the energy storage device is in a stable state; meanwhile, the characteristics of the energy storage equipment and the characteristics of an inverter in the photovoltaic system can also have certain influence on the power parameters of the energy storage equipment.
On the other hand, as the service life of the energy storage equipment is prolonged, the energy storage equipment is aged, the performance is reduced, the performance attenuation of the energy storage equipment is required to be analyzed, the residual service life of the energy storage equipment is estimated, when the performance attenuation of the energy storage equipment is analyzed, the estimated index is not comprehensive enough, the energy storage equipment is damaged due to overcharge and overdischarge, circulation times and temperature, the service life of the energy storage equipment is influenced, and the accuracy of an analysis result is not high.
Disclosure of Invention
Aiming at the problems, the invention provides an intelligent control system for optical storage charge and discharge, which realizes the function of intelligent control of optical storage charge and discharge.
The technical scheme adopted for solving the technical problems is as follows: the invention provides an intelligent control system for optical storage charge and discharge, which comprises: the photovoltaic power generation basic information acquisition module comprises: the method is used for acquiring basic information of each monitoring time point of the power generation equipment in the target solar photovoltaic power generation system in the power generation time period, wherein the basic information comprises power generation voltage and power generation current.
The energy storage equipment charging regulation and control module: the method is used for analyzing and obtaining the proper charging current and proper charging voltage of the energy storage device according to the basic information of the power generation device at each monitoring time point of the power generation time period, and further regulating and controlling the charging parameters and the charging time length of the energy storage device.
The electric equipment basic information acquisition module: the method is used for acquiring basic information of electric equipment in the target solar photovoltaic power generation system, wherein the basic information comprises a reference rated current and a reference rated power.
The energy storage device discharge regulation and control module: the energy storage device is used for regulating and controlling the discharge parameters and the discharge time length of the energy storage device according to the basic information of the electric equipment, wherein the discharge parameters comprise discharge current and discharge power.
The energy storage equipment performance health evaluation module: the method is used for acquiring the operation information of the energy storage device in the history period, wherein the operation information comprises the electric quantity and the working temperature of each charge and each discharge, analyzing and obtaining the performance attenuation coefficient of the energy storage device, further analyzing and processing the reference residual service life of the energy storage device.
Database: the method is used for storing rated charging current and rated discharging current of the inverter unit and the energy storage device in the target solar photovoltaic power generation system, and storing an upper limit value of the stored electric quantity of the energy storage device, a lower limit value of the stored electric quantity of the energy storage device, the total capacity of the energy storage device and a proper range of the working temperature of the energy storage device.
Based on the above embodiment, the specific analysis process of the photovoltaic power generation basic information acquisition module is as follows: setting each monitoring time point in the power generation time period of the target solar photovoltaic power generation system according to a preset equal time interval principle, respectively acquiring the power generation voltage and the power generation current of power generation equipment in the target solar photovoltaic power generation system at each monitoring time point in the power generation time period through a voltage monitoring device and a current monitoring device, and respectively marking the power generation voltage and the power generation current as U a 、I a A represents the number of the a-th monitoring time point, a=1, 2.
Based on the above embodiment, the specific analysis process of the energy storage device charging regulation module includes: a is that 1 Generating current I of power generation equipment in a target solar photovoltaic power generation system at each monitoring time point of a power generation time period a Substitution formulaObtaining a power generation current fluctuation coefficient beta of the power generation equipment in a power generation time period, wherein χ represents a preset power generation current fluctuation coefficient correction factor, and b represents the number of monitoring time points.
By analysis of formulasObtaining a reference power generation current I of the power generation equipment Reference to Where Δi represents a preset reference generated current correction amount of the power generation device.
A 2 : extracting rated charging currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database, and respectively marking the rated charging currents as I Forehead 1 、I Forehead 2 。
A 3 : by analysis of formulasObtaining a proper charging current I of the energy storage device Is suitable for Wherein->Weight factors respectively representing preset reference power generation current of power generation equipment, rated charging current of inverter unit and rated charging current of energy storage equipment, < >>I' represents a predetermined suitable charge current correction amount of the energy storage device.
And similarly, acquiring the proper charging voltage of the energy storage device according to an analysis method of the proper charging current of the energy storage device.
A 4 According to the proper charging current and proper charging voltage of the energy storage device, the charging parameters of the energy storage device are regulated and controlled.
Based on the above embodiment, the specific analysis process of the energy storage device charging regulation module further includes: the method comprises the steps of acquiring real-time stored electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, extracting an upper limit value of the stored electric quantity of the energy storage device stored in a database, comparing the real-time stored electric quantity of the energy storage device with the upper limit value of the stored electric quantity of the energy storage device, and further regulating and controlling the charging time of the energy storage device.
On the basis of the above embodiment, the electric equipment basic information acquisition moduleThe specific analysis process of (2) is as follows: acquiring rated current and rated power of each electric equipment in the target solar photovoltaic power generation system, analyzing to obtain reference rated current and reference rated power of the electric equipment in the target solar photovoltaic power generation system, and respectively representing the reference rated current and the reference rated power as I' Reference to And P Ginseng radix ′ Examination paper 。
Based on the above embodiment, the specific analysis process of the discharge regulation module of the energy storage device includes: extracting rated discharge currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database, and respectively marking the rated discharge currents as I' Forehead 1 、I′ Forehead 2 。
By analysis of formulasObtaining the proper discharge current I 'of the energy storage device' Is suitable for Wherein eta represents a proper discharge current correction factor of the preset energy storage device and gamma 1 、γ 2 、γ 3 Respectively representing the preset weight factors of the reference rated current of the electric equipment, the rated discharge current of the inverter unit and the rated discharge current of the energy storage equipment.
And similarly, acquiring the proper discharge power of the energy storage device according to an analysis method of the proper discharge current of the energy storage device.
And regulating and controlling the discharge parameters of the energy storage equipment according to the proper discharge current and proper discharge power of the energy storage equipment.
Based on the above embodiment, the specific analysis process of the discharge regulation module of the energy storage device further includes: acquiring the stored electric quantity corresponding to the initial moment of the energy storage device in the discharging process, and recording the stored electric quantity as the initial stored electric quantity of the energy storage device and representing the initial stored electric quantity as Q Starting from the beginning 。
Extracting the lower limit value of the storage electric quantity of the energy storage device stored in the database, and marking the lower limit value as Q Lower limit of 。
By analytical formula Δq=κ (Q Starting from the beginning -Q Lower limit of -Q ') obtaining a dischargeable electric quantity Δq of the energy storage device, wherein κ represents a preset correction factor of the dischargeable electric quantity of the energy storage device, Q'Indicating the loss of the stored electricity quantity of the preset energy storage device.
The method comprises the steps of acquiring real-time discharge electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, comparing the real-time discharge electric quantity of the energy storage device with the dischargeable electric quantity of the energy storage device, and further regulating and controlling the discharge time of the energy storage device.
Based on the above embodiment, the specific analysis process of the energy storage device performance health evaluation module includes: f (F) 1 Setting the duration of a history period, acquiring the electric quantity and the working temperature of each charging of the energy storage device in the history period through a data storage unit in the energy storage device, and respectively marking the electric quantity and the working temperature as q x And h x X represents the number of the xth charge, x=1, 2,..y, and the electric quantity and the working temperature of each discharge of the energy storage device in the history period are obtained and respectively recorded as q u And h u Where u represents the number of the u-th discharge, u=1, 2,..v.
Extracting the total capacity of the energy storage devices stored in the database and recording the total capacity as q Total (S) 。
Substituting the electric quantity discharged by the energy storage device in each time in the history period into a formulaObtaining the electric quantity overdischarge proportionality coefficient lambda of the energy storage equipment 1 Wherein sigma 1 Indicating a preset power overdischarge scale factor correction factor,/, for>Representing a preset depth of discharge threshold of the energy storage device.
Similarly, according to the analysis method of the electric quantity over-discharge proportional coefficient of the energy storage device, the electric quantity over-charge proportional coefficient of the energy storage device is obtained and is recorded as lambda 2 。
F 2 Extracting the proper range of the working temperature of the energy storage equipment stored in the database, and respectively marking the lower limit value and the upper limit value of the proper range of the working temperature of the energy storage equipment as T min 、T max 。
Each energy storage device in history periodThe operating temperature of the secondary discharge is substituted into the formulaObtaining a temperature influence factor delta of each discharge of the energy storage device in a history period u Wherein DeltaT' represents a threshold value at which the preset operating temperature exceeds the upper limit value of the suitable range, deltaT "represents a threshold value at which the preset operating temperature is below the lower limit value of the suitable range, ε 1 、ε 2 Respectively represent preset weight factors at low and high temperatures.
According to the temperature influence factors of each discharge of the energy storage device in the history period, analyzing to obtain the temperature influence coefficient of the discharge of the energy storage device in the history period, and recording the temperature influence coefficient as tau 1 。
Similarly, according to an analysis method of the temperature influence coefficient of the discharge of the energy storage device in the history period, the temperature influence coefficient of the charge of the energy storage device in the history period is obtained and is recorded as tau 2 。
F 3 Through analysis of formulasObtaining a performance attenuation coefficient xi of the energy storage device, wherein θ represents a preset energy storage device performance attenuation coefficient correction factor, y represents the charging times, v represents the discharging times, and +.>And representing attenuation influence factors corresponding to a single cycle of the preset energy storage equipment.
Based on the above embodiment, the specific analysis process of the energy storage device performance health evaluation module further includes: d (D) 1 Comparing the performance attenuation coefficient of the energy storage equipment with a preset performance attenuation coefficient threshold value, if the performance attenuation coefficient of the energy storage equipment is larger than the preset performance attenuation coefficient threshold value, the energy storage equipment needs to be replaced, notifying a target solar photovoltaic power generation system management center, otherwise, carrying out line D 2 。
D 2 The service life and the used time length of the energy storage equipment are acquired and respectively recorded as t Life span And t Using By analysis of the formulaObtaining a reference remaining service life t of the energy storage equipment Residual of Wherein ψ represents a reference remaining service life correction factor of a preset energy storage device, e represents a natural constant, and sends the result to a target solar photovoltaic power generation system management center.
Compared with the prior art, the intelligent control system for the optical storage charge and discharge has the following beneficial effects: 1. according to the intelligent control system for optical storage charge and discharge, provided by the invention, the charging parameters and the charging time length of the energy storage device are regulated and controlled by analyzing the proper charging current and the proper charging voltage of the energy storage device, so that the charging stability and the charging safety of the energy storage device are ensured, and overcharge is prevented; regulating and controlling the discharge parameters and the discharge time of the energy storage equipment through the basic information of the electric equipment, so that the discharge of the energy storage equipment is in a stable state, and overdischarge is prevented; the method comprises the steps of obtaining the performance attenuation coefficient of the energy storage equipment, analyzing the reference residual service life of the energy storage equipment, analyzing the performance loss of the energy storage equipment by combining a plurality of indexes, and improving the accuracy of analysis results.
2. According to the invention, the proper charging current and the proper charging voltage of the energy storage device are obtained through analysis, so that the charging parameters and the charging time of the energy storage device are regulated and controlled, the charging stability and the charging safety of the energy storage device are ensured, the occurrence of overcharging is prevented, and the service life of the energy storage device is prolonged.
3. According to the invention, the basic information of the electric equipment in the target solar photovoltaic power generation system is obtained, and the discharge parameters and the discharge time length of the energy storage equipment are regulated and controlled, so that the discharge of the energy storage equipment is in a stable state, overdischarge is prevented, and the service life of the energy storage equipment is prolonged.
4. According to the method, the performance attenuation coefficient of the energy storage equipment is obtained through analysis by acquiring the operation information of the energy storage equipment in the history period, the reference residual service life of the energy storage equipment is further analyzed, the performance loss of the energy storage equipment is analyzed by combining a plurality of evaluation indexes, and the accuracy of an analysis result is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is 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 diagram illustrating a system module connection according to the present invention.
Fig. 2 is a schematic diagram of a target solar photovoltaic power generation system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, the invention provides an intelligent control system for optical storage charge and discharge, which comprises a photovoltaic power generation basic information acquisition module, an energy storage device charge regulation module, an electric equipment basic information acquisition module, an energy storage device discharge regulation module, an energy storage device performance health evaluation module and a database.
The energy storage device charging regulation and control module is respectively connected with the photovoltaic power generation basic information acquisition module and the electric equipment basic information acquisition module, the energy storage device discharging regulation and control module is respectively connected with the electric equipment basic information acquisition module and the energy storage device performance health evaluation module, and the database is respectively connected with the energy storage device charging regulation and control module, the energy storage device discharging regulation and control module and the energy storage device performance health evaluation module.
The photovoltaic power generation basic information acquisition module is used for acquiring basic information of power generation equipment in a target solar photovoltaic power generation system at each monitoring time point of a power generation time period, wherein the basic information comprises power generation voltage and power generation current.
Further, the specific analysis process of the photovoltaic power generation basic information acquisition module is as follows: setting each monitoring time point in the power generation time period of the target solar photovoltaic power generation system according to a preset equal time interval principle, respectively acquiring the power generation voltage and the power generation current of power generation equipment in the target solar photovoltaic power generation system at each monitoring time point in the power generation time period through a voltage monitoring device and a current monitoring device, and respectively marking the power generation voltage and the power generation current as U a 、I a A represents the number of the a-th monitoring time point, a=1, 2.
As a preferable mode, the power generation period refers to a period of illumination, and the non-power generation period refers to a period of no illumination.
As a preferred scheme, the power generation equipment comprises a solar photovoltaic power generation panel and matched equipment thereof.
The energy storage device charging regulation and control module is used for analyzing and obtaining proper charging current and proper charging voltage of the energy storage device according to basic information of the power generation device at each monitoring time point of a power generation time period, and further regulating and controlling charging parameters and charging time of the energy storage device.
Further, the specific analysis process of the energy storage device charging regulation module comprises the following steps: a is that 1 Generating current I of power generation equipment in a target solar photovoltaic power generation system at each monitoring time point of a power generation time period a Substitution formulaObtaining a power generation current fluctuation coefficient beta of the power generation equipment in a power generation time period, wherein χ represents a preset power generation current fluctuation coefficient correction factor, and b represents the number of monitoring time points.
By analysis of formulasObtaining a reference power generation current I of the power generation equipment Reference to Where Δi represents a preset reference generated current correction amount of the power generation device.
A 2 : lifting handleRated charging currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database are taken and respectively recorded as I Forehead 1 、I Forehead 2 。
A 3 : by analysis of formulasObtaining a proper charging current I of the energy storage device Is suitable for Wherein->Weight factors respectively representing preset reference power generation current of power generation equipment, rated charging current of inverter unit and rated charging current of energy storage equipment, < >>I' represents a predetermined suitable charge current correction amount of the energy storage device.
And similarly, acquiring the proper charging voltage of the energy storage device according to an analysis method of the proper charging current of the energy storage device.
A 4 According to the proper charging current and proper charging voltage of the energy storage device, the charging parameters of the energy storage device are regulated and controlled.
As a preferred solution, the charging current and the charging voltage of the energy storage device may be regulated by a controller unit in the target solar photovoltaic power generation system.
Further, the specific analysis process of the energy storage device charging regulation module further comprises: the method comprises the steps of acquiring real-time stored electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, extracting an upper limit value of the stored electric quantity of the energy storage device stored in a database, comparing the real-time stored electric quantity of the energy storage device with the upper limit value of the stored electric quantity of the energy storage device, and further regulating and controlling the charging time of the energy storage device.
The process of regulating and controlling the charging time of the energy storage device comprises the steps of comparing the real-time stored electricity quantity of the energy storage device with the upper limit value of the stored electricity quantity of the energy storage device, and if the real-time stored electricity quantity of the energy storage device reaches the upper limit value of the stored electricity quantity of the energy storage device at a certain moment, recording the moment as the charging end moment of the energy storage device, controlling the energy storage device to stop charging at the moment by a control terminal of the energy storage device, and regulating and controlling the charging time of the energy storage device.
As a preferable scheme, after the energy storage device reaches the upper limit value of the stored electric quantity, if the solar photovoltaic power generation has surplus, the electric quantity of the surplus part is transmitted to a load or is integrated into a power grid.
The invention obtains the proper charging current and the proper charging voltage of the energy storage device through analysis, further regulates and controls the charging parameters and the charging time of the energy storage device, ensures the charging stability and safety of the energy storage device, prevents overcharge and prolongs the service life of the energy storage device.
The electric equipment basic information acquisition module is used for acquiring basic information of electric equipment in the target solar photovoltaic power generation system, wherein the basic information comprises a reference rated current and a reference rated power.
Further, the specific analysis process of the electric equipment basic information acquisition module is as follows: acquiring rated current and rated power of each electric equipment in the target solar photovoltaic power generation system, analyzing to obtain reference rated current and reference rated power of the electric equipment in the target solar photovoltaic power generation system, and respectively representing the reference rated current and the reference rated power as I' Reference to And P' Reference to 。
As a preferable scheme, the reference rated current and the reference rated power of the electric equipment in the target solar photovoltaic power generation system are obtained by the following steps: and comparing rated currents of all the electric equipment to obtain modes of rated currents of the electric equipment, marking the modes as reference rated currents of the electric equipment in the target solar photovoltaic power generation system, and similarly, obtaining the reference rated powers of the electric equipment in the target solar photovoltaic power generation system according to an analysis method of the reference rated currents of the electric equipment in the target solar photovoltaic power generation system.
The energy storage device discharging regulation and control module is used for regulating and controlling discharging parameters and discharging duration of the energy storage device according to basic information of electric equipment, wherein the discharging parameters comprise discharging current and discharging power.
Further, the specific analysis process of the discharge regulation module of the energy storage device comprises the following steps: extracting rated discharge currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database, and respectively marking the rated discharge currents as I' Forehead 1 、I′ Forehead 2 。
By analysis of formulasObtaining the proper discharge current I 'of the energy storage device' Is suitable for Wherein eta represents a proper discharge current correction factor of the preset energy storage device and gamma 1 、γ 2 、γ 3 Respectively representing the preset weight factors of the reference rated current of the electric equipment, the rated discharge current of the inverter unit and the rated discharge current of the energy storage equipment.
And similarly, acquiring the proper discharge power of the energy storage device according to an analysis method of the proper discharge current of the energy storage device.
And regulating and controlling the discharge parameters of the energy storage equipment according to the proper discharge current and proper discharge power of the energy storage equipment.
Further, the specific analysis process of the discharge regulation module of the energy storage device further comprises: acquiring the stored electric quantity corresponding to the initial moment of the energy storage device in the discharging process, and recording the stored electric quantity as the initial stored electric quantity of the energy storage device and representing the initial stored electric quantity as Q Starting from the beginning 。
Extracting the lower limit value of the storage electric quantity of the energy storage device stored in the database, and marking the lower limit value as Q Lower limit of 。
By analytical formula Δq=κ (Q Starting from the beginning -Q Lower limit of -Q ') obtaining a dischargeable electric quantity Δq of the energy storage device, wherein κ represents a preset correction factor of the dischargeable electric quantity of the energy storage device, and Q' represents a preset loss amount of the stored electric quantity of the energy storage device.
The method comprises the steps of acquiring real-time discharge electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, comparing the real-time discharge electric quantity of the energy storage device with the dischargeable electric quantity of the energy storage device, and further regulating and controlling the discharge time of the energy storage device.
As a preferable scheme, the process of regulating and controlling the discharge time length of the energy storage device is as follows: comparing the real-time discharging electric quantity of the energy storage device with the dischargeable electric quantity of the energy storage device, if the real-time discharging electric quantity of the energy storage device reaches the dischargeable electric quantity of the energy storage device at a certain moment, recording the moment as the discharge end moment of the energy storage device, controlling the energy storage device to stop discharging at the control terminal of the energy storage device at the moment, and further regulating and controlling the discharge duration of the energy storage device.
The invention can regulate and control the discharge parameters and the discharge time of the energy storage equipment by acquiring the basic information of the electric equipment in the target solar photovoltaic power generation system, so that the discharge of the energy storage equipment is in a stable state, the overdischarge is prevented, and the service life of the energy storage equipment is prolonged.
The energy storage device performance health evaluation module is used for acquiring operation information of the energy storage device in a history period, wherein the operation information comprises electric quantity and working temperature of each charge and each discharge, analyzing and obtaining a performance attenuation coefficient of the energy storage device, further analyzing and processing the reference residual service life of the energy storage device.
Further, the specific analysis process of the energy storage device performance health evaluation module comprises the following steps: f (F) 1 Setting the duration of a history period, acquiring the electric quantity and the working temperature of each charging of the energy storage device in the history period through a data storage unit in the energy storage device, and respectively marking the electric quantity and the working temperature as q x And h x X represents the number of the xth charge, x=1, 2,..y, and the electric quantity and the working temperature of each discharge of the energy storage device in the history period are obtained and respectively recorded as q u And h u Where u represents the number of the u-th discharge, u=1, 2,..v.
Extracting the total capacity of the energy storage devices stored in the database and recording the total capacity as q Total (S) 。
Substituting the electric quantity discharged by the energy storage device in each time in the history period into a formulaObtaining the electric quantity overdischarge proportionality coefficient lambda of the energy storage equipment 1 Wherein sigma 1 Indicating a preset power overdischarge scale factor correction factor,/, for>Representing a preset depth of discharge threshold of the energy storage device.
Similarly, according to the analysis method of the electric quantity over-discharge proportional coefficient of the energy storage device, the electric quantity over-charge proportional coefficient of the energy storage device is obtained and is recorded as lambda 2 。
F 2 Extracting the proper range of the working temperature of the energy storage equipment stored in the database, and respectively marking the lower limit value and the upper limit value of the proper range of the working temperature of the energy storage equipment as T min 、T max 。
Substituting the working temperature of each discharge of the energy storage device in the history period into a formulaObtaining a temperature influence factor delta of each discharge of the energy storage device in a history period u Wherein DeltaT' represents a threshold value at which the preset operating temperature exceeds the upper limit value of the suitable range, deltaT "represents a threshold value at which the preset operating temperature is below the lower limit value of the suitable range, ε 1 、ε 2 Respectively represent preset weight factors at low and high temperatures.
According to the temperature influence factors of each discharge of the energy storage device in the history period, analyzing to obtain the temperature influence coefficient of the discharge of the energy storage device in the history period, and recording the temperature influence coefficient as tau 1 。
Similarly, according to an analysis method of the temperature influence coefficient of the discharge of the energy storage device in the history period, the temperature influence coefficient of the charge of the energy storage device in the history period is obtained and is recorded as tau 2 。
F 3 Through analysis of formulasObtaining a performance attenuation coefficient xi of the energy storage device, wherein theta represents preset energy storageDevice performance attenuation coefficient correction factor, y represents the number of charging, v represents the number of discharging, +.>And representing attenuation influence factors corresponding to a single cycle of the preset energy storage equipment.
As a preferable scheme, the working temperature of the energy storage device refers to the average temperature of the surface of the energy storage device when the energy storage device works.
As a preferable scheme, the discharging depth of the energy storage device refers to the proportion of the discharging electric quantity of the energy storage device to the total capacity of the energy storage device.
As a preferred option, the energy storage device undergoes one charge and discharge, referred to as one cycle.
As a preferable scheme, the analysis of the temperature influence coefficient of the discharge of the energy storage device in the history period comprises the following specific processes: and comparing the temperature influence factors of the energy storage device in each discharge in the history period to obtain the maximum value and the minimum value of the temperature influence factors of the energy storage device in the history period, and calculating the average value of the maximum value and the minimum value of the temperature influence factors of the energy storage device in the history period to obtain the temperature influence coefficient of the energy storage device in the history period.
Further, the specific analysis process of the energy storage device performance health evaluation module further comprises: d (D) 1 Comparing the performance attenuation coefficient of the energy storage equipment with a preset performance attenuation coefficient threshold value, if the performance attenuation coefficient of the energy storage equipment is larger than the preset performance attenuation coefficient threshold value, the energy storage equipment needs to be replaced, notifying a target solar photovoltaic power generation system management center, otherwise, carrying out line D 2 。
D 2 The service life and the used time length of the energy storage equipment are acquired and respectively recorded as t Life span And t Using By analysis of the formulaObtaining a reference remaining service life t of the energy storage equipment Residual of Wherein ψ represents a parameter of a preset energy storage deviceAnd (5) taking the remaining service life correction factors into account, wherein e represents a natural constant, and transmitting the result to a target solar photovoltaic power generation system management center.
By acquiring the operation information of the energy storage equipment in the history period, the method analyzes the performance attenuation coefficient of the energy storage equipment, further analyzes the reference residual service life of the energy storage equipment, analyzes the performance loss of the energy storage equipment by combining a plurality of evaluation indexes, and improves the accuracy of analysis results.
The database is used for storing rated charging current and rated discharging current of the inverter unit and the energy storage device in the target solar photovoltaic power generation system, and storing an upper limit value of electric quantity stored by the energy storage device, a lower limit value of electric quantity stored by the energy storage device, total capacity of the energy storage device and a proper range of working temperature of the energy storage device.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (9)
1. An optical storage charge-discharge intelligent control system, which is characterized by comprising:
the photovoltaic power generation basic information acquisition module comprises: the method comprises the steps of acquiring basic information of power generation equipment in a target solar photovoltaic power generation system at each monitoring time point of a power generation time period, wherein the basic information comprises power generation voltage and power generation current;
the energy storage equipment charging regulation and control module: the method comprises the steps that according to basic information of the power generation equipment at each monitoring time point of a power generation time period, proper charging current and proper charging voltage of the energy storage equipment are obtained through analysis, and then charging parameters and charging duration of the energy storage equipment are regulated and controlled;
the electric equipment basic information acquisition module: the method comprises the steps of obtaining basic information of electric equipment in a target solar photovoltaic power generation system, wherein the basic information comprises a reference rated current and a reference rated power;
the energy storage device discharge regulation and control module: the energy storage device is used for regulating and controlling the discharge parameters and the discharge time length of the energy storage device according to the basic information of the electric equipment, wherein the discharge parameters comprise discharge current and discharge power;
the energy storage equipment performance health evaluation module: the method comprises the steps of acquiring operation information of the energy storage equipment in a history period, wherein the operation information comprises electric quantity and working temperature of each charge and each discharge, analyzing to obtain a performance attenuation coefficient of the energy storage equipment, further analyzing and processing reference residual service life of the energy storage equipment;
database: the method is used for storing rated charging current and rated discharging current of the inverter unit and the energy storage device in the target solar photovoltaic power generation system, and storing an upper limit value of the stored electric quantity of the energy storage device, a lower limit value of the stored electric quantity of the energy storage device, the total capacity of the energy storage device and a proper range of the working temperature of the energy storage device.
2. The intelligent control system for optical storage charging and discharging according to claim 1, wherein: the specific analysis process of the photovoltaic power generation basic information acquisition module is as follows:
setting each monitoring time point in the power generation time period of the target solar photovoltaic power generation system according to a preset equal time interval principle, respectively acquiring the power generation voltage and the power generation current of power generation equipment in the target solar photovoltaic power generation system at each monitoring time point in the power generation time period through a voltage monitoring device and a current monitoring device, and respectively marking the power generation voltage and the power generation current as U a 、I a A represents the number of the a-th monitoring time point, a=1, 2.
3. The intelligent control system for optical storage charging and discharging according to claim 2, wherein: the specific analysis process of the energy storage device charging regulation module comprises the following steps:
A 1 generating current I of power generation equipment in a target solar photovoltaic power generation system at each monitoring time point of a power generation time period a Substitution formulaObtaining a power generation current fluctuation coefficient beta of the power generation equipment in a power generation time period, wherein χ represents a preset power generation current fluctuation coefficient correction factor, and b represents the number of monitoring time points;
by analysis of formulasObtaining a reference power generation current I of the power generation equipment Reference to Wherein Δi represents a reference generated current correction amount of the preset power generation device;
A 2 : extracting rated charging currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database, and respectively marking the rated charging currents as I Forehead 1 、I Forehead 2 ；
A 3 : by analysis of formulasObtaining a proper charging current I of the energy storage device Is suitable for Wherein->Weight factors respectively representing preset reference power generation current of power generation equipment, rated charging current of inverter unit and rated charging current of energy storage equipment, < >>I' represents a preset proper charging current correction amount of the energy storage device;
similarly, according to an analysis method of the proper charging current of the energy storage device, proper charging voltage of the energy storage device is obtained;
A 4 according to the proper charging current and proper charging voltage of the energy storage device, the charging parameters of the energy storage device are regulated and controlled.
4. The intelligent control system for optical storage charging and discharging according to claim 1, wherein: the specific analysis process of the energy storage device charging regulation module further comprises the following steps:
the method comprises the steps of acquiring real-time stored electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, extracting an upper limit value of the stored electric quantity of the energy storage device stored in a database, comparing the real-time stored electric quantity of the energy storage device with the upper limit value of the stored electric quantity of the energy storage device, and further regulating and controlling the charging time of the energy storage device.
5. The intelligent control system for optical storage charging and discharging according to claim 1, wherein: the specific analysis process of the electric equipment basic information acquisition module is as follows:
acquiring rated current and rated power of each electric equipment in the target solar photovoltaic power generation system, analyzing to obtain reference rated current and reference rated power of the electric equipment in the target solar photovoltaic power generation system, and respectively representing the reference rated current and the reference rated power as I' Reference to And P Ginseng radix ′ Examination paper 。
6. The intelligent control system for optical storage charging and discharging according to claim 5, wherein: the specific analysis process of the discharge regulation module of the energy storage device comprises the following steps:
extracting rated discharge currents of an inverter unit and energy storage equipment in a target solar photovoltaic power generation system stored in a database, and respectively marking the rated discharge currents as I' Forehead 1 、I′ Forehead 2 ；
By analysis of formulasObtaining the proper discharge current I 'of the energy storage device' Is suitable for Wherein eta represents a proper discharge current correction factor of the preset energy storage device and gamma 1 、γ 2 、γ 3 Respectively representing the preset weight factors of the reference rated current of the electric equipment, the rated discharge current of the inverter unit and the rated discharge current of the energy storage equipment;
similarly, according to an analysis method of the proper discharge current of the energy storage device, proper discharge power of the energy storage device is obtained;
and regulating and controlling the discharge parameters of the energy storage equipment according to the proper discharge current and proper discharge power of the energy storage equipment.
7. The intelligent control system for optical storage charging and discharging according to claim 1, wherein: the specific analysis process of the discharge regulation module of the energy storage device further comprises the following steps:
acquiring the stored electric quantity corresponding to the initial moment of the energy storage device in the discharging process, and recording the stored electric quantity as the initial stored electric quantity of the energy storage device and representing the initial stored electric quantity as Q Starting from the beginning ；
Extracting the lower limit value of the storage electric quantity of the energy storage device stored in the database, and marking the lower limit value as Q Lower limit of ；
By analytical formula Δq=κ (Q Starting from the beginning -Q Lower limit of -Q ') obtaining a dischargeable electric quantity Δq of the energy storage device, wherein κ represents a preset correction factor of the dischargeable electric quantity of the energy storage device, and Q' represents a preset loss amount of the electric quantity stored by the energy storage device;
the method comprises the steps of acquiring real-time discharge electric quantity of the energy storage device through an electric quantity monitoring unit inside the energy storage device, comparing the real-time discharge electric quantity of the energy storage device with the dischargeable electric quantity of the energy storage device, and further regulating and controlling the discharge time of the energy storage device.
8. The intelligent control system for optical storage charging and discharging according to claim 1, wherein: the specific analysis process of the energy storage device performance health evaluation module comprises the following steps:
F 1 setting the duration of a history period, acquiring the electric quantity and the working temperature of each charging of the energy storage device in the history period through a data storage unit in the energy storage device, and respectively marking the electric quantity and the working temperature as q x And h x X represents the number of the xth charge, x=1, 2,..y, and the electric quantity and the working temperature of each discharge of the energy storage device in the history period are obtained and respectively recorded as q u And h u Where u represents the number of the u-th discharge, u=1, 2, v;
extracting the total capacity of the energy storage devices stored in the database,it is denoted as q Total (S) ；
Substituting the electric quantity discharged by the energy storage device in each time in the history period into a formulaObtaining the electric quantity overdischarge proportionality coefficient lambda of the energy storage equipment 1 Wherein sigma 1 Indicating a preset power overdischarge scale factor correction factor,/, for>Representing a preset depth of discharge threshold of the energy storage device;
similarly, according to the analysis method of the electric quantity over-discharge proportional coefficient of the energy storage device, the electric quantity over-charge proportional coefficient of the energy storage device is obtained and is recorded as lambda 2 ；
F 2 Extracting the proper range of the working temperature of the energy storage equipment stored in the database, and respectively marking the lower limit value and the upper limit value of the proper range of the working temperature of the energy storage equipment as T min 、T max ；
Substituting the working temperature of each discharge of the energy storage device in the history period into a formulaObtaining a temperature influence factor delta of each discharge of the energy storage device in a history period u Wherein DeltaT' represents a threshold value at which the preset operating temperature exceeds the upper limit value of the suitable range, deltaT "represents a threshold value at which the preset operating temperature is below the lower limit value of the suitable range, ε 1 、ε 2 Respectively representing preset weight factors at low temperature and high temperature;
according to the temperature influence factors of each discharge of the energy storage device in the history period, analyzing to obtain the temperature influence coefficient of the discharge of the energy storage device in the history period, and recording the temperature influence coefficient as tau 1 ；
Similarly, according to an analysis method of the temperature influence coefficient of the discharge of the energy storage device in the history period, the temperature influence coefficient of the charge of the energy storage device in the history period is obtained and is recorded as tau 2 ；
F 3 Through analysis of formulasObtaining a performance attenuation coefficient xi of the energy storage device, wherein θ represents a preset energy storage device performance attenuation coefficient correction factor, y represents the charging times, v represents the discharging times, and +.>And representing attenuation influence factors corresponding to a single cycle of the preset energy storage equipment.
9. The intelligent control system for optical storage charging and discharging according to claim 8, wherein: the specific analysis process of the energy storage device performance health evaluation module further comprises the following steps:
D 1 comparing the performance attenuation coefficient of the energy storage equipment with a preset performance attenuation coefficient threshold value, if the performance attenuation coefficient of the energy storage equipment is larger than the preset performance attenuation coefficient threshold value, the energy storage equipment needs to be replaced, notifying a target solar photovoltaic power generation system management center, otherwise, carrying out line D 2 ；
D 2 The service life and the used time length of the energy storage equipment are acquired and respectively recorded as t Life span And t Using By analysis of the formulaObtaining a reference remaining service life t of the energy storage equipment Residual of Wherein ψ represents a reference remaining service life correction factor of a preset energy storage device, e represents a natural constant, and sends the result to a target solar photovoltaic power generation system management center.
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