Method and device for determining design scheme of energy storage system, electronic equipment and medium

Abstract

The embodiment of the invention discloses a method and device for determining an energy storage system design scheme, electronic equipment and a medium. The method comprises the following steps: determining target attribute information of an electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed; in at least one pre-stored battery system, determining at least one battery system matched with the target attribute information as an alternative battery system, and for the at least one alternative battery system, determining an alternative design scheme corresponding to the alternative battery system; wherein the target attribute information comprises target system capacity and / or rated charging and discharging power; the alternative design scheme is a design scheme of the electrochemical energy storage system comprising the alternative battery system; and determining a to-be-obtained value attribute value correspondingly generated by the at least one alternative design scheme, and determining a recommended design scheme in the at least one alternative design scheme based on the to-be-obtained value attribute value.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of power distribution technology, and in particular to a method, device, electronic device, and medium for determining a design solution for an energy storage system. Background Art

[0002] With the rapid development of renewable energy and the advancement of energy transformation, electrochemical energy storage systems are increasingly being used in power systems. Electrochemical energy storage systems have the advantages of fast response, high energy conversion efficiency, and flexible installation, and can provide peak load regulation, frequency regulation, standby and other services for power systems.

[0003] In the prior art, the planning and design of electrochemical energy storage systems is a complex process, and currently mainly relies on manual experience to determine the design of electrochemical energy storage systems. However, manual experience in planning electrochemical energy storage systems cannot evaluate the value attributes that the planned electrochemical energy storage systems can generate, resulting in a waste of resources. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, electronic device and medium for determining a design scheme of an energy storage system, so as to ensure that an electrochemical energy storage system designed with a recommended design scheme can be effectively utilized and avoid wasting resources.

[0005] According to one aspect of the present invention, a method for determining a design solution for an energy storage system is provided, comprising:

[0006] Determining target attribute information of the electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed; wherein the target attribute information includes target system capacity and / or rated charge and discharge power;

[0007] Determine at least one battery system that matches the target attribute information from among at least one pre-stored battery system as an alternative battery system, and determine an alternative design scheme corresponding to the at least one alternative battery system; wherein the alternative design scheme is a design scheme of an electrochemical energy storage system including the alternative battery system;

[0008] Determine a value attribute value to be obtained corresponding to at least one of the alternative design solutions, and determine a recommended design solution from at least one of the alternative design solutions based on the value attribute value to be obtained.

[0009] According to another aspect of the present invention, a device for determining a design scheme of an energy storage system is provided, the device comprising:

[0010] A target attribute information determination module, used to determine the target attribute information of the electrochemical energy storage system to be designed based on the preset system load information of the electrochemical energy storage system; wherein the target attribute information includes the target system capacity and / or the rated charge and discharge power;

[0011] An alternative design scheme determining module, used to determine at least one battery system matching the target attribute information from at least one pre-stored battery system as an alternative battery system, and for the at least one alternative battery system, determine an alternative design scheme corresponding to the alternative battery system; wherein the alternative design scheme is a design scheme of an electrochemical energy storage system including the alternative battery system;

[0012] The recommended design scheme determining module is used to determine the value attribute value to be obtained corresponding to at least one of the alternative design schemes, and determine a recommended design scheme from at least one of the alternative design schemes based on the value attribute value to be obtained.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the energy storage system design scheme described in any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the energy storage system design scheme described in any embodiment of the present invention when executed.

[0018] The technical solution of the embodiment of the present invention determines the target attribute information of the electrochemical energy storage system through the preset system load information of the electrochemical energy storage system to be designed; and, in at least one pre-stored battery system, at least one battery system matching the target attribute information is determined as an alternative battery system, and for at least one alternative battery system, an alternative design scheme corresponding to the alternative battery system is determined, thereby ensuring that the alternative design scheme can match the target attribute information of the electrochemical energy storage system to be designed; wherein the target attribute information includes the target system capacity and / or the rated charge and discharge power; the alternative design scheme is a design scheme for the electrochemical energy storage system including the alternative battery system; finally, the value attribute value to be obtained corresponding to at least one alternative design scheme is determined, and based on the value attribute value to be obtained, a recommended design scheme is determined in at least one alternative design scheme. The technical solution of this embodiment, taking into account the value attribute value to be obtained of the alternative design scheme, determines a recommended design scheme from the alternative design schemes matching the target attribute information, thereby ensuring that the electrochemical energy storage system designed by the recommended design scheme can be effectively utilized and avoid waste of resources.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a flow chart of a method for determining an energy storage system design solution provided according to an embodiment of the present invention;

[0022] Figure 2 is a flow chart of another method for determining a design solution of an energy storage system provided according to an embodiment of the present invention;

[0023] Figure 3 is a structural schematic diagram of a device for determining an energy storage system design solution provided according to an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of an electronic device for implementing a method for determining a design scheme for an energy storage system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "etc." and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0027] It should be noted that the collection, collection, updating, analysis, processing, use, transmission, storage and other aspects of user personal information involved in the technical solution of this disclosure are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. Necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information and network security.

[0028] Figure 1 This is a flow chart of a method for determining a design scheme for an energy storage system provided according to an embodiment of the present invention. This embodiment can be applied to the case of determining a design scheme for designing an electrochemical energy storage system. The method can be executed by a device for determining a design scheme for an energy system. The device for determining a design scheme for an energy system can be implemented in the form of hardware and / or software.

[0029] like Figure 1 As shown, the method of this embodiment may specifically include:

[0030] S110. Determine target attribute information of the electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed.

[0031] Among them, the target attribute information includes the target system capacity and / or the rated charge and discharge power. The preset system load information can be used to reflect the power demand information required by the load in the power system that needs the electrochemical energy storage system to be designed to provide electrical energy. The preset system load information includes a first load power value of the electrochemical energy storage system in the charging period of a preset unit cycle, and a second load power value in the discharge period of the preset unit cycle. Exemplarily, the preset unit cycle may be 24 hours, and the preset unit cycle may include a charging period when the electrochemical energy storage system works in a charging mode, and a discharge period when it works in a discharge mode.

[0032] It should be noted that the electrochemical energy storage system is usually charged at night when the power grid is undervalued, and discharged during the peak power consumption in the daytime. Therefore, the processing mode can be set to charging mode, discharging mode and neither charging nor discharging mode. By obtaining the peak and valley time segmentation of electricity prices, the unit cycle is divided into multiple time periods, such as peak period, valley period and flat period; and the processing mode corresponding to each time period in the preset unit cycle is determined based on the peak and valley time periods of electricity prices.

[0033] For example, the default mode is set first, that is, the valley section, deep valley section, and normal period in the unit cycle are set to charging mode by default; the peak section or peak section in the unit cycle is set to discharge mode. Then, starting from the first period in the unit cycle, each normal period is traversed in chronological order. If the period before the currently traversed normal period is a valley section or a deep valley section, the normal period can be set from the default mode to discharge mode. Finally, for each period currently set to charging mode, based on the electricity price policy, the charging value attribute value corresponding to each period currently set to charging mode is determined, and the period corresponding to the lowest value of the charging value attribute is still set to charging mode, and the other periods adjust the original charging mode to a non-charging and non-discharging mode. The period corresponding to the charging mode can be called the charging period, and the period corresponding to the discharge mode can be called the discharge period.

[0034] In this embodiment, based on the preset system load information of the electrochemical energy storage system to be designed, the implementation method of determining the target attribute information of the electrochemical energy storage system includes: generating a charging power curve and a discharging power curve corresponding to the electrochemical energy storage system in a preset unit period based on the first load power value and the second load power value; determining the target charging power and the target discharging power of the electrochemical energy storage system based on the charging power curve, the discharging power curve and the preset adjustment parameters; and determining the minimum value of the target charging power and the target discharging power as the target system capacity.

[0035] In a specific implementation, the target attribute information may be the target system capacity. The charging power value corresponding to the electrochemical energy storage system at a preset time in a preset unit period may be determined based on the first load power value, and the charging power curve of the electrochemical energy storage system may be formed based on the charging power values ​​at different preset times corresponding to the charging period. Specifically, the formula for determining the charging power value is as follows:

[0036] p charge =S*kp load

[0037] Among them, p charge represents the charging power value at the preset time, S represents the ratio between the transformer capacity of the transformer corresponding to the electrochemical energy storage system and the billing demand, k represents the dimensionless coefficient of the transformer margin, and p load Indicates the first load power value at a preset time belonging to the charging period.

[0038] Furthermore, since the discharge power of the electrochemical energy storage system cannot be greater than the load power, the second load power values ​​corresponding to different moments in the discharge period can be used as discharge power values ​​to form a discharge power curve of the electrochemical energy storage system.

[0039] In a specific implementation, points can be taken from the charging power curve and the discharging power curve to extract a preset number of time points. The charging power values ​​corresponding to different time points in the charging power curve can be compared with the preset adjustment parameters to determine the third number of moments when the charging power value is greater than the preset adjustment parameters, and the third product of the third number and the preset adjustment parameters is determined, and the third product is used as the target charging power. In addition, the discharge power values ​​corresponding to different time points in the discharge power curve can be compared with the preset adjustment parameters to determine the fourth number of moments when the discharge power value is greater than the preset adjustment parameters, and the fourth product of the fourth number and the preset adjustment parameters is determined, and the fourth product is used as the target discharge power. The minimum value of the target discharge power and the target charging power is determined, and the minimum value is used as the target system capacity.

[0040] This embodiment provides a method for determining the target system capacity by presetting adjustment parameters, and can determine the target system capacity in combination with the load information of the electrochemical energy storage system, thereby increasing the reliability and effectiveness of determining the system capacity of the electrochemical energy storage system.

[0041] It should be noted that in order to accurately determine the target system capacity, accurate preset adjustment parameters need to be determined in advance. In this embodiment, before determining the target charging capacity and target discharging capacity of the electrochemical energy storage system based on the charging power curve, the discharging power curve and the preset adjustment parameters, it also includes: for each alternative adjustment parameter, determining the first number of moments in the charging power curve when the charging power value is greater than the alternative adjustment parameter, determining the second number of moments in the discharging power curve when the discharge power value is greater than the alternative adjustment parameter, determining the first number and the first product of the alternative adjustment parameter as the alternative charging capacity, and determining the second number and the second product of the alternative adjustment parameter as the alternative discharging capacity, and forming an alternative charging and discharging combination with the alternative discharging capacity and the alternative charging capacity; determining the minimum capacity value in each alternative charging and discharging combination, and determining the alternative adjustment parameter corresponding to the alternative charging and discharging combination to which the maximum value of each minimum capacity value belongs as the preset adjustment parameter.

[0042] In a specific implementation, multiple alternative adjustment parameters may be preset. For example, the first maximum power value and the first minimum power value in the charging power curve may be determined, the second maximum power value and the second minimum power value in the discharging power curve may be determined, and the value range of the alternative adjustment parameters may be determined based on the first maximum power value, the first minimum power value, the second maximum power value and the second minimum power value, and the multiple alternative adjustment parameters may be determined from the value range by using an arithmetic difference value method.

[0043] Furthermore, the charging power curve and the discharging power curve may be extracted to extract a preset number of time points, and the charging power value corresponding to each time point in the charging power curve and the discharging power value corresponding to each time point in the discharging power curve may be determined. For example, the preset number of time points may be determined by equally dividing the time periods corresponding to the charging power curve and the discharging power curve.

[0044] Specifically, for each alternative adjustment parameter, the charging power value corresponding to each determined time point can be compared with the alternative adjustment parameter to determine the first number of moments when the charging power value is greater than the alternative adjustment parameter, and the first product of the first number and the alternative adjustment parameter is used as the alternative charging power. Determine the second number of moments in the discharge power curve when the discharge power value is greater than the alternative adjustment parameter, determine the first product of the first number and the alternative adjustment parameter as the alternative charging power, and determine the second product of the second number and the alternative adjustment parameter as the alternative discharge power. The alternative discharge power and the alternative charging power form an alternative charge-discharge combination; determine the minimum power value in each alternative charge-discharge combination, and determine the alternative adjustment parameter corresponding to the alternative charge-discharge combination to which the maximum value among each minimum power value belongs as the preset adjustment parameter.

[0045] In this embodiment, among a plurality of candidate adjustment parameters, the candidate adjustment parameter that can generate the maximum power value is determined as the preset adjustment parameter, so that a larger target system capacity can be determined through the preset adjustment parameter.

[0046] Furthermore, the target attribute information also includes rated charge and discharge power. The specific implementation method of determining the rated charge and discharge power includes: after determining the minimum value of the target charge power and the target discharge power as the target system capacity, determining the shortest time period in each charging period and discharging period in the preset unit cycle; and determining the ratio of the target system capacity to the shortest time period as the rated charge and discharge power.

[0047] In a specific implementation, the duration of the charging period and the duration of the discharging period included in the preset unit cycle are determined, and each duration is determined for comparison, and the minimum duration is determined as the shortest duration of the period. The determined target system capacity is divided by the shortest duration of the period, and the ratio is used to determine the rated charge and discharge power of the electrochemical energy storage system. This embodiment quickly determines the rated charge and discharge power of the electrochemical energy storage system by determining the target system capacity and the shortest duration of the period.

[0048] S120: Determine at least one battery system matching the target attribute information from at least one pre-stored battery system as a candidate battery system, and determine, for the at least one candidate battery system, a candidate design scheme corresponding to the candidate battery system.

[0049] Among them, the alternative design scheme is a design scheme of an electrochemical energy storage system that includes an alternative battery system.

[0050] It should be noted that the battery capacities corresponding to multiple battery systems can be pre-stored. In order to determine the battery system that matches the electrochemical energy storage system to be planned, the battery capacity that matches the target system capacity can be screened out, so that the battery system corresponding to the matching battery capacity can be used as an alternative battery system. For each alternative battery system, at least one of the converters, transformers and cables that matches the alternative battery system can be determined accordingly, so that the design scheme of the electrochemical energy storage system is composed of the alternative battery system and at least one of the converters, transformers and cables as an alternative design scheme corresponding to the alternative battery system.

[0051] S130: Determine a value attribute value to be obtained corresponding to at least one alternative design solution, and determine a recommended design solution from the at least one alternative design solution based on the value attribute value to be obtained.

[0052] The value attribute value to be obtained refers to the value attribute value that can be obtained by the electrochemical energy storage system designed according to the alternative design scheme.

[0053] Optionally, determining the value attribute value to be obtained corresponding to at least one alternative design scheme includes: for each alternative design scheme, determining the system charging efficiency and the system discharging efficiency of the electrochemical energy storage system set in the alternative design scheme; based on the system charging efficiency, the system discharge efficiency, the preset discharge depth and the target system capacity, determining the single charge capacity and the single discharge capacity of the electrochemical energy storage system set in the alternative design scheme; based on the single charge capacity and the single discharge capacity, determining the value attribute value to be obtained of the alternative design scheme.

[0054] Specifically, the system charging efficiency is equal to the product of the battery efficiency, the power conversion system efficiency, the power line efficiency and the transformer efficiency. The battery efficiency is the ratio of the amount of electricity discharged by the battery system to the amount of electricity charged. The battery efficiency, the power conversion system efficiency, the power line efficiency and the transformer efficiency can all be set in combination with the actual application situation. For example, the battery power can be set to be greater than or equal to 95%. The power conversion system efficiency is greater than 98.5%; the power line efficiency is the efficiency after considering the bidirectional transmission loss of the AC and DC cables, including the DC side cable efficiency, the low-voltage AC side wire efficiency, and the high-voltage AC side wire efficiency. The power line efficiency can be set to 99.34%. The transformer efficiency is the efficiency after considering the bidirectional transformation loss of the transformer. Considering the load loss and the no-load loss, the transformer efficiency can be set to 98.98%. Further, the system discharge efficiency is also equal to the product of the battery efficiency, the power conversion system efficiency, the power line efficiency and the transformer efficiency. The system charging efficiency can be the same as the system discharge efficiency, or the system charging efficiency can be different from the system discharge efficiency due to different values ​​of the battery efficiency, the power conversion system efficiency, the power line efficiency and the transformer efficiency.

[0055] The charge and discharge capacity of an electrochemical energy storage system is a key indicator that describes the total energy charged and discharged by the electrochemical energy storage system within a specific time period. The charge and discharge capacity of an electrochemical energy storage system provides a design basis for performance evaluation, economic benefit analysis, system design and optimization, energy management and scheduling, as well as forecasting and planning. When calculating the charge and discharge capacity, it is assumed that each charge and discharge cycle of the energy storage system can be fully charged and discharged. The single charge capacity of a single charge and discharge cycle can be calculated based on the equipment selection parameters. Specifically, those skilled in the art can determine the preset discharge depth according to the actual application situation. Determine a first ratio of the preset discharge depth to the system charging efficiency, and a second ratio of the preset discharge depth to the system discharge efficiency, and take the product of the first ratio and the target system capacity as the single charge capacity; take the product of the second ratio and the target system capacity as the single discharge capacity.

[0056] In a specific implementation, based on the single charge power and the single discharge power, the value attribute value of the alternative design scheme in a single charge and discharge cycle is determined by:

[0057] profitcycle =E dischar *prc dischar -E charge *prc char

[0058] Among them, profit cycle Indicates the value attribute value of a single charge and discharge cycle, E dischar Indicates the single discharge capacity, E charge Indicates the single charge capacity, prc dischar represents the electricity price during the discharge period, prc char Indicates the electricity price during the charging period.

[0059] Furthermore, based on the value attribute value of a single charge-discharge cycle, the annual peak-valley revenue of the electrochemical energy storage system is determined as the value attribute value to be obtained for the electrochemical energy storage system. Specifically, the product of the value attribute value of a single charge-discharge cycle, the number of days in a year, and the number of times a single charge-discharge cycle is repeated per day is used as the value attribute value to be obtained for the electrochemical energy storage system corresponding to the alternative design scheme.

[0060] This embodiment combines electricity prices to effectively determine the value attribute value to be obtained corresponding to each alternative design solution, so that the determined value attribute value to be obtained is more in line with the actual application scenario, and it is convenient to accurately determine the recommended design solution based on the value attribute value to be obtained.

[0061] In this embodiment, after determining the value attribute value to be obtained corresponding to each alternative design solution, the alternative design solution corresponding to the largest value attribute value to be obtained can be used as the recommended design solution. Alternatively, from the alternative design solutions with the largest preset number of solutions for the value attribute value to be obtained, the alternative design solution with the lowest cost is determined as the recommended design solution.

[0062] The technical solution of the embodiment of the present invention determines the target attribute information of the electrochemical energy storage system through the preset system load information of the electrochemical energy storage system to be designed; and, in at least one pre-stored battery system, at least one battery system matching the target attribute information is determined as an alternative battery system, and for at least one alternative battery system, an alternative design scheme corresponding to the alternative battery system is determined, thereby ensuring that the alternative design scheme can match the target attribute information of the electrochemical energy storage system to be designed; wherein the target attribute information includes the target system capacity and / or the rated charge and discharge power; the alternative design scheme is a design scheme for the electrochemical energy storage system including the alternative battery system; finally, the value attribute value to be obtained corresponding to at least one alternative design scheme is determined, and based on the value attribute value to be obtained, a recommended design scheme is determined in at least one alternative design scheme. The technical solution of this embodiment, taking into account the value attribute value to be obtained of the alternative design scheme, determines a recommended design scheme from the alternative design schemes matching the target attribute information, thereby ensuring that the electrochemical energy storage system designed by the recommended design scheme can be effectively utilized and avoid waste of resources.

[0063] Figure 2 1 is a flowchart of another method for determining a design scheme for an energy storage system according to an embodiment of the present invention. Based on the above embodiment, this embodiment determines, for each candidate battery system, a candidate converter corresponding to the candidate battery system according to preset screening conditions, and generates a candidate design scheme based on the candidate battery system and the candidate converter. The explanations of the terms that are the same or corresponding to the above embodiments are not repeated here. Figure 2 As shown, the method includes:

[0064] S210: Determine target attribute information of the electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed.

[0065] S220: Determine at least one battery system that matches the target attribute information from at least one pre-stored battery system as a candidate battery system.

[0066] S230: for each candidate battery system, determine a candidate converter corresponding to the candidate battery system according to preset screening conditions, and generate a candidate design solution based on the candidate battery system and the candidate converter.

[0067] In a specific implementation, in order to ensure that the designed electrochemical energy storage system can work normally, the alternative converter corresponding to the alternative battery system can be determined according to the preset screening conditions. Among them, the preset screening conditions include that the rated power of the alternative battery system does not exceed the rated power of the converter, and the output voltage of the alternative battery system does not exceed the input voltage derating value of the converter. In the case where the number of determined alternative converters is multiple, an alternative design scheme can be generated for each alternative converter combined with the alternative battery system; or, any alternative converter can be selected and combined with the alternative battery system to generate an alternative design scheme.

[0068] Furthermore, when the grid-connected voltage exceeds the output voltage range of the converter, a transformer needs to be configured to ensure that the transformer capacity and power meet the system output requirements.

[0069] This embodiment sets preset screening conditions to facilitate rapid and effective determination of candidate converters corresponding to candidate battery systems, thereby ensuring that the designed electrochemical energy storage system can work normally.

[0070] In addition, after determining the alternative inverter corresponding to the alternative battery system according to preset screening conditions, it also includes: determining the maximum output current of the alternative inverter based on the maximum power on the AC side and the output voltage of the alternative inverter; determining the alternative cable corresponding to the alternative inverter based on the maximum output current; generating alternative design schemes based on the alternative battery system and the alternative inverter, including: generating alternative design schemes based on the alternative battery system, alternative inverter and alternative cables.

[0071] It should be noted that the cables include cables connecting the output end of the converter and the input end of the step-up transformer, and cables connecting the output end of the step-up transformer and the grid connection point. The cables between the output end of the converter and the input end of the step-up transformer can be selected based on the rated output voltage and rated output current of the converter, and the cables between the output end of the step-up transformer and the grid connection point can be selected based on the rated output voltage of the step-up transformer and the transformer capacity.

[0072] Specifically, for the cable connecting the output terminal of the converter and the input terminal of the step-up transformer, the maximum output current of the candidate converter is determined based on the maximum power on the AC side and the output terminal voltage of the candidate converter to be connected, and the determination formula is as follows:

[0073]

[0074] Among them, I max Indicates the maximum output current, V out It represents the output voltage, and M represents the maximum power on the AC side.

[0075] In a specific implementation, based on the maximum output current, the optional cable cross-sectional area of ​​the cable corresponding to the alternative converter is determined, and the cable whose cross-sectional area matches the optional cross-sectional area is determined as the alternative cable. The design scheme of the electrochemical energy storage system composed of mutually matching alternative battery systems, alternative converters and alternative cables is determined as the alternative design scheme.

[0076] S240: Determine a value attribute value to be obtained corresponding to at least one alternative design solution, and determine a recommended design solution from the at least one alternative design solution based on the value attribute value to be obtained.

[0077] In order to enable engineers to have a clearer understanding of the investment cost of the recommended design scheme, the cost of the recommended design scheme can be calculated. Investment cost calculation supports the estimation of equipment and installation projects, construction projects, other expenses, basic reserve funds, etc. The equipment and installation project costs mainly include energy storage equipment and installation projects, power distribution equipment and installation projects, and control and protection equipment and installation projects. Energy storage equipment and installation projects include battery containers, collector lines, grounding and subsystem commissioning, etc.; power distribution equipment and installation projects include PCS containers, station transformer cabinets and power cable laying, etc.; control and protection equipment and installation projects include battery management systems, energy management systems, automation monitoring systems, communication devices, power quality monitoring and power collection devices, anti-islanding and fault separation devices, video monitoring devices, anti-backflow systems and environmental detection devices, etc. A default cost standard can be set for each project, and the total cost of the electrochemical energy storage system corresponding to the recommended design scheme can be determined based on the cost standard.

[0078] In this embodiment, the electrochemical energy storage system corresponding to each alternative design scheme can be modeled on the distributed simulation planning platform, and the model can be simulated and displayed. The overall technical architecture of the distributed simulation planning platform may include a standard layer, a data layer, an interface layer, a functional layer, and an application layer. Among them, the standard layer is the basic standard specification followed by the platform construction, the multi-domain unified modeling language specification, the RESTful interface specification (Representational State Transfer, Representational State Transfer Interface Specification), TCP / IP (Transmission Control Protocol / Internet Protocol, Transmission Control Protocol / Internet Protocol) specification, Websocket protocol specification, and HTTPS (HyperText TransferProtocol Secure, Hypertext Transfer Security) protocol specification. The data layer is the source of obtaining models, algorithms, and data, mainly including engineering databases, model libraries, and algorithm libraries. The engineering database includes an environmental database, an equipment database, and an energy pricing database. The model library includes a battery model, a power conversion system model, a battery manager model, an energy management system model, and the like. The algorithm library stores planning and design algorithms, load forecasting algorithms, and scheme optimization algorithms. The interface layer includes an environmental data interface, an equipment data interface, an energy pricing data interface, and a large language model interface. The functional layer provides software functional module support for the platform, including basic functional modules, energy storage functional modules and data interfaces. The basic functional modules include modeling and simulation modules, engineering data management modules, project management modules, report generation modules, result visualization modules and background management modules. The business functional modules include load analysis submodules, planning and design submodules, investment cost calculation submodules and economic benefit calculation submodules. The application layer is the interactive application entrance between users and the platform. The main application scenarios include compliance analysis, planning and design, parameter optimization, engineering budget, financial evaluation, scheme comparison and report generation.

[0079] Figure 3 1 is a schematic diagram of the structure of a device for determining a design scheme of an energy storage system provided in accordance with an embodiment of the present invention. The device is used to execute a method for determining a design scheme of an energy storage system provided in any of the above embodiments. The device and the method for determining a design scheme of an energy storage system in the above embodiments belong to the same inventive concept. For details not fully described in the embodiment of the device for determining a design scheme of an energy storage system, reference can be made to the embodiment of the method for determining a design scheme of an energy storage system. Figure 3 As shown, the device comprises:

[0080] A target attribute information determination module 10, for determining target attribute information of the electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed;

[0081] The alternative design scheme determining module 11 is used to determine at least one battery system matching the target attribute information as an alternative battery system from at least one pre-stored battery system, and determine an alternative design scheme corresponding to the alternative battery system for the at least one alternative battery system; wherein the target attribute information includes the target system capacity and / or the rated charge and discharge power; the alternative design scheme is a design scheme of an electrochemical energy storage system including the alternative battery system;

[0082] The recommended design solution determination module 12 is used to determine the value attribute value to be obtained corresponding to at least one alternative design solution, and determine a recommended design solution from at least one alternative design solution based on the value attribute value to be obtained.

[0083] On the basis of any optional technical solution in the embodiment of the present invention, optionally, the preset system load information includes a first load power value of the electrochemical energy storage system in a charging period of a preset unit cycle, and a second load power value in a discharging period of a preset unit cycle; the target attribute information determination module 10 includes:

[0084] A curve generation submodule, for generating a charging power curve and a discharging power curve corresponding to the electrochemical energy storage system in a preset unit period based on the first load power value and the second load power value;

[0085] A power determination submodule, used to determine a target charging power and a target discharging power of the electrochemical energy storage system based on a charging power curve, a discharging power curve and preset adjustment parameters;

[0086] The capacity determination submodule is used to determine the minimum value between the target charging power and the target discharging power as the target system capacity.

[0087] Based on any optional technical solution in the embodiment of the present invention, optionally, the target attribute information determination module 10 further includes:

[0088] The alternative charge-discharge combination determination submodule is used to determine, based on the charging power curve, the discharging power curve and the preset adjustment parameters, before determining the target charging power and the target discharging power of the electrochemical energy storage system, for each alternative adjustment parameter, determine the first number of moments in the charging power curve at which the charging power value is greater than the alternative adjustment parameter, determine the second number of moments in the discharging power curve at which the discharge power value is greater than the alternative adjustment parameter, determine the first number and the first product of the alternative adjustment parameter as the alternative charging power, determine the second number and the second product of the alternative adjustment parameter as the alternative discharging power, and form an alternative charge-discharge combination with the alternative discharging power and the alternative charging power;

[0089] The preset adjustment parameter determination submodule is used to determine the minimum power value in each candidate charge-discharge combination, and determine the candidate adjustment parameter corresponding to the candidate charge-discharge combination to which the maximum value among the minimum power values ​​belongs as the preset adjustment parameter.

[0090] Based on any optional technical solution in the embodiment of the present invention, optionally, the target attribute information determination module 10 further includes:

[0091] A submodule for determining the shortest duration of a time period, for determining the shortest duration of each charging time period and discharging time period in a preset unit cycle after determining the minimum value of the target charging power and the target discharging power as the target system capacity;

[0092] The rated charge and discharge power determination submodule is used to determine the ratio of the target system capacity and the shortest time period as the rated charge and discharge power.

[0093] Based on any optional technical solution in the embodiment of the present invention, optionally, the alternative design solution determination module 11 includes:

[0094] The alternative design scheme generation submodule is used to determine, for each alternative battery system, an alternative inverter corresponding to the alternative battery system according to preset screening conditions, and generate an alternative design scheme based on the alternative battery system and the alternative inverter; wherein the preset screening conditions include that the rated power of the alternative battery system does not exceed the rated power of the inverter, and the output voltage of the alternative battery system does not exceed the input voltage derating value of the inverter.

[0095] On the basis of any optional technical solution in the embodiment of the present invention, optionally, the alternative design solution determining module 11 further includes:

[0096] A maximum output current determination submodule, for determining the maximum output current of the candidate converter based on the maximum power on the AC side and the output terminal voltage of the candidate converter after determining the candidate converter corresponding to the candidate battery system according to the preset screening conditions;

[0097] The candidate cable determination submodule is used to determine the candidate cable corresponding to the candidate converter based on the maximum output current;

[0098] The alternative design solution generation submodule is used to generate alternative design solutions based on alternative battery systems, alternative converters and alternative cables.

[0099] Based on any optional technical solution in the embodiment of the present invention, optionally, the recommended design solution determination module 12 includes:

[0100] The submodule for determining the value attribute value to be obtained is used to determine, for each alternative design scheme, the system charging efficiency and the system discharging efficiency of the electrochemical energy storage system set in the alternative design scheme, and based on the system charging efficiency, the system discharging efficiency, the preset discharge depth and the target system capacity, determine the single charging capacity and the single discharging capacity of the electrochemical energy storage system set in the alternative design scheme, and based on the single charging capacity and the single discharging capacity, determine the value attribute value to be obtained of the alternative design scheme.

[0101] The technical solution of the embodiment of the present invention determines the target attribute information of the electrochemical energy storage system through the preset system load information of the electrochemical energy storage system to be designed; and, in at least one pre-stored battery system, at least one battery system matching the target attribute information is determined as an alternative battery system, and for at least one alternative battery system, an alternative design scheme corresponding to the alternative battery system is determined, thereby ensuring that the alternative design scheme can match the target attribute information of the electrochemical energy storage system to be designed; wherein the target attribute information includes the target system capacity and / or the rated charge and discharge power; the alternative design scheme is a design scheme for the electrochemical energy storage system including the alternative battery system; finally, the value attribute value to be obtained corresponding to at least one alternative design scheme is determined, and based on the value attribute value to be obtained, a recommended design scheme is determined in at least one alternative design scheme. The technical solution of this embodiment, taking into account the value attribute value to be obtained of the alternative design scheme, determines a recommended design scheme from the alternative design schemes matching the target attribute information, thereby ensuring that the electrochemical energy storage system designed by the recommended design scheme can be effectively utilized and avoid waste of resources.

[0102] It is worth noting that in the embodiment of the determination device of the above energy storage system design scheme, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0103] Figure 4 It is a structural schematic diagram of an electronic device for implementing a method for determining a design scheme for an energy storage system of an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0104] like Figure 4 As shown, the electronic device 20 includes at least one processor 21, and a memory connected to the at least one processor 21, such as a read-only memory (ROM) 22, a random access memory (RAM) 23, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 21 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 22 or the computer program loaded from the storage unit 28 to the random access memory (RAM) 23. In RAM23, various programs and data required for the operation of the electronic device 20 can also be stored. The processor 21, ROM22 and RAM23 are connected to each other through a bus 24. An input / output (I / O) interface 25 is also connected to the bus 24.

[0105] A number of components in the electronic device 20 are connected to the I / O interface 25, including: an input unit 26, such as a keyboard, a mouse, etc.; an output unit 27, such as various types of displays, speakers, etc.; a storage unit 28, such as a disk, an optical disk, etc.; and a communication unit 29, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 29 allows the electronic device 20 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0106] The processor 21 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 21 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 21 executes the various methods and processes described above, such as a method for determining a design solution for an energy storage system.

[0107] In some embodiments, the method for determining the design of the energy storage system may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 28. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 20 via the ROM 22 and / or the communication unit 29. When the computer program is loaded into the RAM 23 and executed by the processor 21, one or more steps of the method for determining the design of the energy storage system described above may be performed. Alternatively, in other embodiments, the processor 21 may be configured to execute the method for determining the design of the energy storage system in any other appropriate manner (e.g., by means of firmware).

[0108] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0109] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0110] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0111] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0112] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0113] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0114] This embodiment also provides a computer program product, including a computer program, which, when executed by a processor, implements a method for determining an energy storage system design solution as provided in any embodiment of the present application.

[0115] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0116] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0117] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a design scheme of an energy storage system, characterized in that: include: Determining target attribute information of the electrochemical energy storage system based on preset system load information of the electrochemical energy storage system to be designed; At least one battery system matching the target attribute information is determined as an alternative battery system from among at least one pre-stored battery system, and an alternative design scheme corresponding to the alternative battery system is determined for the at least one alternative battery system; wherein the target attribute information includes a target system capacity and / or a rated charge and discharge power; and the alternative design scheme is a design scheme of an electrochemical energy storage system including the alternative battery system; Determine a value attribute value to be obtained corresponding to at least one of the alternative design solutions, and determine a recommended design solution from at least one of the alternative design solutions based on the value attribute value to be obtained.

2. The method according to claim 1, characterized in that The preset system load information includes a first load power value of the electrochemical energy storage system during a charging period of a preset unit cycle, and a second load power value during a discharging period of the preset unit cycle; Based on preset system load information of the electrochemical energy storage system to be designed, target attribute information of the electrochemical energy storage system is determined, including: Based on the first load power value and the second load power value, generating a charging power curve and a discharging power curve corresponding to the electrochemical energy storage system in a preset unit period; Determining a target charging power and a target discharging power of the electrochemical energy storage system based on the charging power curve, the discharging power curve and preset adjustment parameters; A minimum value between the target charging power and the target discharging power is determined as the target system capacity.

3. The method according to claim 2, characterized in that Before determining the target charging power and target discharging power of the electrochemical energy storage system based on the charging power curve, the discharging power curve and the preset adjustment parameters, the method further includes: For each alternative adjustment parameter, determining a first number of moments in the charging power curve at which the charging power value is greater than the alternative adjustment parameter, determining a second number of moments in the discharging power curve at which the discharging power value is greater than the alternative adjustment parameter, determining a first product of the first number and the alternative adjustment parameter as an alternative charging power, determining a second product of the second number and the alternative adjustment parameter as an alternative discharging power, and forming an alternative charging and discharging combination with the alternative discharging power and the alternative charging power; The minimum power value in each of the candidate charge-discharge combinations is determined, and the candidate adjustment parameter corresponding to the candidate charge-discharge combination to which the maximum value of each of the minimum power values ​​belongs is determined as the preset adjustment parameter.

4. The method according to claim 2, characterized in that: After determining the minimum value of the target charging power and the target discharging power as the target system capacity, the method further includes: Determine the shortest duration of each of the charging time periods and the discharging time periods in the preset unit cycle; The ratio of the target system capacity to the shortest duration of the time period is determined as the rated charge and discharge power.

5. The method according to claim 1, characterized in that The step of determining, for the at least one candidate battery system, a candidate design scheme corresponding to the candidate battery system includes: For each of the alternative battery systems, the alternative inverter corresponding to the alternative battery system is determined according to preset screening conditions, and the alternative design scheme is generated based on the alternative battery system and the alternative inverter; wherein the preset screening conditions include that the rated power of the alternative battery system does not exceed the rated power of the inverter, and the output voltage of the alternative battery system does not exceed the input voltage derating value of the inverter.

6. The method according to claim 5, characterized in that After determining the candidate converter corresponding to the candidate battery system according to the preset screening condition, the method further includes: Determining the maximum output current of the candidate converter based on the maximum power on the AC side and the output terminal voltage of the candidate converter; Based on the maximum output current, determining an alternative cable corresponding to the alternative converter; The generating the alternative design solution based on the alternative battery system and the alternative converter comprises: The alternative design solution is generated based on the alternative battery system, the alternative converter and the alternative cable.

7. The method according to claim 1, characterized in that The determining of the to-be-obtained value attribute value corresponding to at least one of the alternative design solutions includes: For each of the alternative design schemes, determine the system charging efficiency and the system discharging efficiency of the electrochemical energy storage system set by the alternative design scheme; based on the system charging efficiency, the system discharging efficiency, the preset discharge depth and the target system capacity, determine the single charge capacity and the single discharge capacity of the electrochemical energy storage system set by the alternative design scheme; based on the single charge capacity and the single discharge capacity, determine the value attribute value to be obtained of the alternative design scheme.

8. A device for determining a design scheme of an energy storage system, characterized in that: include: A target attribute information determination module, used to determine the target attribute information of the electrochemical energy storage system to be designed based on preset system load information of the electrochemical energy storage system; An alternative design scheme determination module is used to determine at least one battery system matching the target attribute information as an alternative battery system from at least one pre-stored battery system, and determine an alternative design scheme corresponding to the alternative battery system for the at least one alternative battery system; wherein the target attribute information includes a target system capacity and / or a rated charge and discharge power; and the alternative design scheme is a design scheme of an electrochemical energy storage system including the alternative battery system; The recommended design scheme determining module is used to determine the value attribute value to be obtained corresponding to at least one of the alternative design schemes, and determine a recommended design scheme from at least one of the alternative design schemes based on the value attribute value to be obtained.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the energy storage system design solution according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the energy storage system design solution according to any one of claims 1 to 7 when executed.

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