Energy storage configuration method and device for renewable energy power generation, hydrogen production and ammonia synthesis system

Abstract

The invention discloses an energy storage configuration method and device for a renewable energy power generation and hydrogen production synthesis ammonia system, and the method comprises the steps: carrying out the modeling of each workshop section of the renewable energy power generation and hydrogen production synthesis ammonia system, and obtaining a workshop section model of each workshop section; determining a target function of the renewable energy power generation hydrogen production ammonia synthesis system; determining renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation hydrogen production synthesis ammonia system; determining the initial state of the renewable energy power generation hydrogen production synthesis ammonia system by utilizing the renewable energy power demand flexibility and the energy supply flexibility; and analyzing the flexibility of the renewable energy power generation and hydrogen production synthesis ammonia system in each interval based on the initial state, and configuring an energy storage device of the renewable energy power generation and hydrogen production synthesis ammonia system based on the analysis result of the flexibility. According to the method and the device, the evaluation precision of flexibility evaluation of the P2A system is improved, and the accuracy and the reliability of energy storage configuration are further improved.

Description

Technical Field

[0001] The present application belongs to the field of renewable energy technology, and in particular relates to an energy storage configuration method and device for a renewable energy power generation, hydrogen production and ammonia synthesis system. Background Art

[0002] The Power-to-Ammonia (P2A) system is a comprehensive energy conversion and storage technology that converts renewable energy such as wind and solar energy into hydrogen energy and further synthesizes ammonia. This system not only helps solve the intermittent and volatile problems of renewable energy, but also provides a new way to achieve deep decarbonization in the industrial field.

[0003] In some scenarios, although the P2A system has great potential in promoting decarbonization in the industrial sector, its development also faces many challenges. In particular, renewable energy generation represented by wind and solar power has strong volatility, intermittency and randomness, which puts higher requirements on the stable operation of the P2A system. In order to cope with this uncertainty, the P2A system must have sufficient adjustment ability and response speed to maintain the balance and safe operation of the entire system. This ability is usually called "flexibility". In the past, the flexibility of electric energy mainly relied on energy storage devices, and its dynamic process changed linearly. Therefore, its energy flexibility evaluation can adopt relatively simple methods such as linear programming. However, the process of the P2A system involves multiple complex chemical reaction steps and exhibits highly nonlinear characteristics. Therefore, it is no longer effective to evaluate the flexibility of the P2A system through linear programming methods. The evaluation accuracy of the flexibility evaluation of the P2A system is low, resulting in low accuracy and reliability of energy storage configuration. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method and device for energy storage configuration of a renewable energy power generation, hydrogen production and ammonia synthesis system, which can solve the problems of low assessment accuracy of energy flexibility assessment of the P2A system and low accuracy and reliability of energy storage configuration.

[0005] In a first aspect, a method for configuring an energy storage system for generating hydrogen from renewable energy power generation and ammonia synthesis is provided, which is executed by a terminal, and comprises: modeling each section of the system to obtain a section model of each section; determining an objective function of the system to maximize the total revenue of a production plan of the system to maximize the total revenue ...

[0006] In a second aspect, a device for configuring an energy storage system for generating hydrogen from renewable energy power generation and ammonia synthesis is provided, comprising: a modeling module for modeling each section of the system to generate hydrogen from renewable energy power generation and ammonia synthesis to obtain a section model of each section; a determination module for determining an objective function of the system to generate hydrogen from renewable energy power generation and ammonia synthesis based on power generation data in a predetermined time period of an area to be configured and the section model, wherein the objective function is to maximize the total revenue of a production plan of the system to generate hydrogen from renewable energy power generation and ammonia synthesis; the determination module is also used to determine the flexibility of renewable energy power demand and the flexibility of energy supply of the system to generate hydrogen from renewable energy power generation and ammonia synthesis based on the power generation power of renewable energy in the system to generate hydrogen from renewable energy power generation and ammonia synthesis; the determination module is also used to determine the initial state of the system to generate hydrogen from renewable energy power generation and ammonia synthesis by utilizing the flexibility of renewable energy power demand and the flexibility of energy supply; a configuration module is used to divide the time period corresponding to the production plan into multiple intervals, analyze the flexibility of the system to generate hydrogen from renewable energy power generation and ammonia synthesis in each interval based on the initial state, and configure the energy storage device of the system to generate hydrogen from renewable energy power generation and ammonia synthesis based on the analysis result of the flexibility.

[0007] In a third aspect, an embodiment of the present application provides an electronic device comprising: a memory, a processor, and computer executable instructions stored in the memory and executable on the processor, wherein the computer executable instructions implement the steps of executing the method of the first aspect when executed by the processor.

[0008] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which is used to store computer-executable instructions. When the computer-executable instructions are executed by a processor, the steps of the method of the first aspect are implemented.

[0009] In an embodiment of the present application, each work section of the renewable energy power generation hydrogen production and ammonia synthesis system is first modeled to obtain a work section model of each work section; then, the objective function of the renewable energy power generation hydrogen production and ammonia synthesis system is determined based on the power generation data within a predetermined time period of the area to be configured and the work section model, and the objective function is to maximize the total revenue of the production plan of the renewable energy power generation hydrogen production and ammonia synthesis system; then, based on the power generation power of renewable energy in the renewable energy power generation hydrogen production and ammonia synthesis system, the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation hydrogen production and ammonia synthesis system are determined; secondly, the renewable energy power demand flexibility and energy supply flexibility are used to determine the initial state of the renewable energy power generation hydrogen production and ammonia synthesis system; finally, the time period corresponding to the production plan is divided into multiple intervals, and the flexibility of the renewable energy power generation hydrogen production and ammonia synthesis system in each interval is analyzed based on the initial state, and the energy storage device of the renewable energy power generation hydrogen production and ammonia synthesis system is configured based on the flexibility analysis results.

[0010] In this way, the embodiment of the present application can formulate a production plan for the P2A system based on the power generation output of renewable energy. Then, based on this production plan, the corresponding time period is divided into multiple intervals in the P2A system, and an interval is analyzed from the perspective of power flexibility, that is, the flexibility of the time series power space is transformed into the characteristic space. Through the energy characterization flexibility that the P2A system can provide in time windows of different widths, the energy flexibility of the P2A system is obtained to meet the energy storage parameters required by the energy flexibility of renewable energy, so that the P2A system can respond quickly to the regulation instructions of renewable energy and effectively maintain the stable operation and safety balance of the P2A system. In this way, the method provided in the embodiment of the present application is adopted to improve the evaluation accuracy of the flexibility evaluation of the P2A system, thereby improving the accuracy and reliability of the energy storage configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 A schematic flow chart of an energy storage configuration method for a renewable energy power generation, hydrogen production and ammonia synthesis system provided in an embodiment of the present application.

[0013] Figure 2 A schematic diagram of the structure of a renewable energy power generation, hydrogen production and ammonia synthesis system provided in an embodiment of the present application.

[0014] Figure 3A schematic diagram of a curve between flexible energy supply and flexible energy demand provided in an embodiment of the present invention.

[0015] Figure 4 A schematic diagram of a curve between another flexible energy supply and flexible energy demand provided in an embodiment of the present invention.

[0016] Figure 5 A schematic diagram of a shortage curve provided in an embodiment of the present application.

[0017] Figure 6 A schematic diagram of the structure of an energy storage configuration device for a renewable energy power generation, hydrogen production and ammonia synthesis system provided in an embodiment of the present application.

[0018] Figure 7 This is one of the structural schematic diagrams of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0020] The technical solution provided by the embodiments of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0021] Figure 1 A schematic diagram of a method for configuring an energy storage system for generating hydrogen from renewable energy and synthesizing ammonia is shown in the flowchart of an embodiment of the present application. The method can be executed by an electronic device, such as a terminal device or a server device. In other words, the method can be executed by software or hardware installed in the terminal device or the server device. Figure 1 As shown, the method may include the following steps.

[0022] Step S101, modeling each section of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain a section model of each section.

[0023] Specifically, the renewable energy power generation hydrogen production ammonia synthesis system in the embodiment of the present application can be an off-grid wind power hydrogen production ammonia synthesis system of an indirect synthesis route. Among them, the section types of the renewable energy power generation hydrogen production ammonia synthesis system include water electrolysis hydrogen production section, ammonia synthesis section and compression buffer section. For example, Figure 2 As shown, Figure 2A schematic diagram of a system for producing hydrogen and synthesizing ammonia using renewable energy is provided in an embodiment of the present application. Figure 2 It includes a water electrolysis hydrogen production section, a compression buffer section and ammonia synthesis section. In the water electrolysis hydrogen production section, wind power generation and photovoltaic power generation input electric energy into the electrolyzer through the power bus to electrolyze water to produce hydrogen. In the compression buffer section, nitrogen is produced by air separation, and the hydrogen obtained in the water electrolysis hydrogen production section is compressed by a compressor and enters the hydrogen buffer tank. In the ammonia synthesis section, ammonia is separated by a synthetic ammonia tower to obtain liquid ammonia. It is worth noting that the specific principles and specific production processes of the renewable energy power generation hydrogen production and ammonia synthesis system can be referred to the prior art, and the embodiments of the present invention will not be described in detail here.

[0024] Among them, industrial-scale water electrolysis hydrogen production plants are usually composed of dozens of electrolyzers. For multiple electrolyzers, through the combination of unit start and stop and load distribution, the cluster load can be continuously changed in the range of 5 to 100%, and the energy conversion efficiency is close to linear. Therefore, as an optional embodiment of the present application, a linear model is used to model the relationship between the equality constraints of the power consumption of the water electrolysis hydrogen production section, the hydrogen production flow rate, and the power consumed by the supporting auxiliary equipment, as well as the inequality relationship between the power consumption of the water electrolysis hydrogen production section and the average power consumption of the water electrolysis hydrogen production section, to obtain a water electrolysis hydrogen production section model.

[0025] Specifically, the embodiment of the present invention specifically adopts the following equation relationship and inequality relationship to determine the water electrolysis hydrogen production section model:

[0026]

[0027] in, Represents the hydrogen production flow rate at time t. t P2H It represents the power consumption of the water electrolysis hydrogen production section at time t. P2H,0 The power consumed by the supporting auxiliary equipment. is a constant coefficient, and its product with the hydrogen production flow rate is the power consumed by the electrolyzer itself. Indicates the average power consumption of the water electrolysis hydrogen production section.

[0028] Furthermore, as an optional embodiment of the present invention, an inequality relationship between the ammonia yield at each moment, the synthetic ammonia load ramp rate, the upper and lower limits of the ammonia yield, and the upper and lower limits of the synthetic ammonia load ramp rate is constructed to obtain a synthetic ammonia section model.

[0029] Specifically, the embodiment of the present invention uses the following inequality relationship to determine the synthetic ammonia section model:

[0030]

[0031] Among them, h is the scheduling step size. is the yield of ammonia at time t. is the ammonia production rate at time t-1. is the synthetic ammonia load ramp rate at time t. It is the upper limit of the synthetic ammonia load ramp rate. It is the lower limit of the synthetic ammonia load ramp rate. is the upper limit of ammonia production rate. is the lower limit of ammonia production.

[0032] Further, as an optional embodiment of the present invention, an equation relationship is constructed among the hydrogen storage capacity of the hydrogen storage tank at the next moment, the hydrogen storage capacity of the hydrogen storage tank at the current moment, the hydrogen production flow rate at the next moment, and the hydrogen storage tank outlet flow rate, as well as an equation relationship between the power used by the compressor, the molar mass of hydrogen, the hydrogen production flow rate at the current moment, the compressor efficiency, the ideal gas constant, the temperature before hydrogen compression, the pressure before hydrogen compression, and the pressure after hydrogen compression, as well as an inequality relationship between the upper and lower limits of the hydrogen storage capacity of the hydrogen storage tank and the hydrogen storage capacity of the hydrogen storage tank at each moment, as well as an equation relationship between the power consumption used by air, the air flow rate, the molar mass of air, the temperature before air compression, the ideal gas constant, the pressure before air compression, the pressure after air compression, and the compressor efficiency, to obtain a compression buffer section model.

[0033] Specifically, the embodiment of the present invention specifically adopts the following relationship to represent the compression buffer section model:

[0034]

[0035]

[0036] in, is the hydrogen storage capacity of the hydrogen storage tank at time t+1. is the hydrogen storage capacity of the hydrogen storage tank at the current time t. Represents the hydrogen production flow rate at time t+1. is the hydrogen tank outlet flow rate at time t+1, which is equal to the hydrogen flow rate at the inlet of the synthetic ammonia section. R is the ideal gas constant; η c is the compressor efficiency, η c Take it as 60%. Represents the hydrogen production flow rate at time t. is the power used by the compressor at time t. is the molar mass of hydrogen. It is the upper limit of the hydrogen storage capacity of the hydrogen storage tank. It is the lower limit of hydrogen storage capacity of hydrogen storage tank. t AS The electrical energy consumed by air. t Air is the air flow rate. M Airis the molar mass of air. T1 is the temperature of air before compression. T2 is the temperature of hydrogen before compression. p1 is the pressure of air before compression. p2 is the pressure of hydrogen before compression. p3 is the pressure of hydrogen after compression. p4 is the pressure of air after compression. ln represents the natural logarithm operation, that is, the logarithm with e as the base.

[0037] Step S102, determining the objective function of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the power generation data of the area to be configured within a predetermined time period and the work section model.

[0038] The objective function is to maximize the total revenue of the production plan of the renewable energy power generation, hydrogen production and ammonia synthesis system.

[0039] Specifically, the embodiment of the present invention specifically adopts the following formula to configure the objective function:

[0040]

[0041] In the above formula, M Z Represents the total benefit of the P2A system. Represents the ammonia sales revenue of the P2A system. Z Represents the total cost of the P2A system.

[0042] Furthermore, according to the constraint relationship of each work section model in the above embodiment of the present invention and the power generation data within a predetermined time period of the area to be configured, the ammonia sales income, maintenance cost, investment cost and raw material cost of the renewable energy power generation hydrogen production and ammonia synthesis system are determined.

[0043] In the embodiment of the present application, the total cost of configuring the P2A system is as follows:

[0044] C Z =C yw +C tz +C yl

[0045] In the above formula, C Z Represents the total cost of the P2A system. yw Represents the maintenance cost of the P2A system. tz Represents the investment cost of the P2A system. yl Represents the raw material cost of the P2A system.

[0046] Furthermore, the embodiment of the present invention uses the following formula to represent the maintenance cost of the P2A system:

[0047]

[0048] In the above formula, C yw Represents the maintenance cost of the P2A system. i Indicates the investment cost per unit capacity of the equipment.max,i is the rated capacity of each device. i It is the proportion of each equipment’s operation and maintenance cost in the investment cost.

[0049] Furthermore, the embodiment of the present invention uses the following formula to represent the investment cost of the P2A system:

[0050]

[0051] In the above formula, C tz Represents the investment cost of the P2A system. i E represents the investment cost per unit capacity of the i-th equipment. max,i is the rated capacity of the i-th device. N is the total number of devices. L is the planned life of the P2A system. η i is the discount rate of the ith device.

[0052] Furthermore, the embodiment of the present invention uses the following formula to represent the raw material cost of the P2A system:

[0053]

[0054] In the above formula, C yl Represents the raw material cost of the P2A system. Indicates the price of industrial water. It represents the total mass of industrial water consumed by the system. T represents the quantity at the moment.

[0055] Step S103, determining the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the power generation power of renewable energy in the renewable energy power generation, hydrogen production and ammonia synthesis system.

[0056] Specifically, in the embodiment of the present invention, the power demand of renewable energy is transformed into the distribution of energy in time. Then, the boundary of energy that can be provided by the P2A system in different time windows is calculated, and the flexibility feasibility is judged according to whether the supplied flexible energy can fully cover the flexible energy demand of renewable energy power.

[0057] Furthermore, as an optional embodiment of the present invention, the analysis period of the renewable energy power generation hydrogen production and ammonia synthesis system is first determined; then the power of renewable energy power generation in each analysis time window within the analysis period is integrated to obtain the upper and lower limits of the demand flexibility of the renewable energy power in the analysis time window; finally, the power of renewable energy power generation in the analysis time window is integrated to obtain the upper and lower limits of the energy supply flexibility of the renewable energy power in the analysis time window.

[0058] Specifically, the upper and lower limits of the demand flexibility of renewable energy power in the analysis time window can be expressed as follows:

[0059]

[0060] In the above formula, P t D is the power generated by renewable energy at time t. m, n are constants in the time window [0, T]. It represents the upper limit of demand flexibility within any analysis time window [m,n] with a length less than τ. represents the lower bound of demand flexibility within any analysis time window [m,n] of length less than τ. Note that the subscript τ refers to the width of the analysis time window, which can be any period in [0,T], not necessarily [0,τ]. The width of the analysis time window represents different types of energy demand such as ramping, peaks, or long-term balance. ω represents a random event. Ω represents a set of random events.

[0061] Furthermore, in the embodiment of the present invention, the upper and lower limits of the energy supply flexibility of the renewable energy power in the analysis time window are expressed by the following formula:

[0062]

[0063] in, It represents the upper limit of the energy supply flexibility of renewable energy power in the analysis time window [0, τ]. P represents the lower limit of the energy supply flexibility of renewable energy power in the analysis time window [0, τ]. t is the power of the P2A system at time t.

[0064] Furthermore, the flexibility feasibility criterion is whether the flexible energy supply provided by the P2A system in different time windows can include the flexible energy demand:

[0065]

[0066] In the above formula, K represents the flexibility feasibility criterion.

[0067] For example, Figure 3 and Figure 4 As shown, Figure 3 A schematic diagram of a curve between a flexible energy supply and a flexible energy demand provided in an embodiment of the present invention, Figure 4 A schematic diagram of a curve between another flexible energy supply and flexible energy demand provided in an embodiment of the present invention. Figure 3 In this case, the flexible energy supply of the P2A system can include the flexible energy demand, and the system flexibility is feasible. Figure 4 At this time, the flexible energy supply of the P2A system cannot include the flexible energy demand, and the system flexibility is not feasible.

[0068] Step S104, using the power demand flexibility and energy supply flexibility of renewable energy to determine the initial state of the system for generating hydrogen and synthesizing ammonia through power generation from renewable energy.

[0069] Specifically, the embodiment of the present invention uses adaptive sparse polynomial approximation (ASPA) to build a proxy model to optimize the initial state of the P2A system.

[0070] Furthermore, as an optional embodiment of the present invention, first, functions of the upper and lower limits of energy supply flexibility and the initial values ​​of the renewable energy power generation hydrogen production and ammonia synthesis system are respectively constructed, and the initial values ​​of the renewable energy power generation hydrogen production and ammonia synthesis system include initial ammonia synthesis yield, initial hydrogen production flow rate and initial hydrogen reserves; then, a scalar function is constructed according to the upper and lower limits of energy supply flexibility in different analysis time windows; secondly, based on a polynomial approximation algorithm, a polynomial approximation is performed on the function of the initial value to obtain a polynomial function corresponding to the scalar function; finally, the initial state of the renewable energy power generation hydrogen production and ammonia synthesis system is determined according to the equation relationship between the polynomial function and the scalar function.

[0071] Specifically, embodiments of the present invention provide flexibility to the upper and lower energy boundaries. and Record as initial value The function is expressed as follows:

[0072]

[0073] In the above formula, f ammonia i,0 (0) represents the initial synthetic ammonia yield. P2H i,0 (0) represents the initial hydrogen production flow rate. Indicates the initial hydrogen storage.

[0074] Furthermore, the embodiment of the present invention uses adaptive sparse polynomial approximation (ASPA) to construct a proxy model of P2A system flexibility. Specifically, the flexibility corresponding to different time window lengths τ is provided to the energy boundary and Let it be vector f(x i,0 The polynomial approximation uses the weighted sum of the polynomial basis and the corresponding coefficients to approximate the dynamic response of the actual system. i,0 ) can be approximated by ASPA as the following polynomial function:

[0075]

[0076] Among them, f * (x i,0 ) represents the polynomial function obtained by polynomial approximation. Φ k (·) is a multivariate Legendre polynomial basis. Ξ is a vector index set. x i,0 is the initial state. j,k Represents the coefficients of a multivariate Legendre polynomial basis.

[0077] In this way, the upper and lower boundaries of the flexible energy supply of a given P2A system with respect to the initial state x can be obtained: i,0 Algebraic polynomial functions of . Solve them separately and The desired initial state can be obtained.

[0078] Step S105, dividing the time period corresponding to the production plan into multiple intervals, analyzing the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system in each interval based on the initial state, and configuring the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system based on the flexibility analysis results.

[0079] Specifically, after the embodiment of the present invention sets the initial parameters of the P2A system according to the optimization results, the time span of the production plan is divided into 60 small intervals of 12 hours in accordance with the production plan of the P2A system. Flexibility analysis is performed on each small interval in the P2A system. More specifically, it is determined whether the energy supply flexibility in the initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system in each interval meets the flexibility of renewable energy power demand; if not, it indicates that the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system is insufficient; if so, it indicates that the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system is sufficient.

[0080] Furthermore, as an optional embodiment of the present invention, configuring the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system based on the flexibility analysis results includes: determining the upper and lower flexibility energy limits of the energy storage device according to the power of the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system; and configuring the energy storage device using the upper and lower flexibility energy limits of the energy storage device when the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system is insufficient.

[0081] Specifically, for the situation of insufficient flexibility in flexibility analysis, the required flexibility compensation shortfall is further analyzed and a shortfall curve is drawn. The shortfall curve is overlaid with the flexibility curve of the energy storage battery to obtain the energy storage battery parameters that meet the flexibility requirements of renewable energy power generation within the 12 hours.

[0082] Further, in the embodiment of the present invention, the upper and lower limits of the flexibility energy of the energy storage device can be expressed by the following formula:

[0083]

[0084] In the above formula, represents the upper limit of the energy storage battery in [0, τ]. represents the lower limit of the energy storage battery in [0, τ]. t B Represents the power of the energy storage battery at time t.

[0085] Furthermore, the above embodiment of the present invention analyzes the situation of insufficient flexibility, further analyzes the required flexibility to compensate for the shortfall, and draws a diagram such as Figure 5 The shortfall curve is shown in Figure 1. Figure 5 A schematic diagram of a deficit curve is provided for an embodiment of the present application, in which the flexibility curve of the energy storage battery is used to cover the deficit curve, so as to obtain energy storage battery parameters that meet the flexibility requirements of renewable energy power generation within 12 hours.

[0086] The embodiment of the present application can formulate a production plan for the P2A system based on the power generation output of renewable energy. Then, based on this production plan, the corresponding time period is divided into multiple intervals in the P2A system, and an interval is analyzed from the perspective of power flexibility, that is, the flexibility of the time series power space is transformed into the characteristic space. Through the energy characterization flexibility that the P2A system can provide in time windows of different widths, the energy flexibility of the P2A system is obtained to meet the energy storage parameters required by the energy flexibility of renewable energy, so that the P2A system can respond quickly to the regulation instructions of renewable energy and effectively maintain the stable operation and safety balance of the P2A system. In this way, the method provided in the embodiment of the present application is adopted to improve the evaluation accuracy of the flexibility evaluation of the P2A system, thereby improving the accuracy and reliability of the energy storage configuration.

[0087] Figure 6It is a structural schematic diagram of an energy storage configuration device for a renewable energy power generation hydrogen production ammonia synthesis system provided by an exemplary embodiment of the present application. The device 600 includes: a modeling module 601, which is used to model each section of the renewable energy power generation hydrogen production ammonia synthesis system to obtain a section model of each section; a determination module 602, which is used to determine the objective function of the renewable energy power generation hydrogen production ammonia synthesis system according to the power generation data in a predetermined time period of the area to be configured and the section model, and the objective function is to maximize the total revenue of the production plan of the renewable energy power generation hydrogen production ammonia synthesis system; the determination module 602 is also used to determine the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation hydrogen production ammonia synthesis system according to the power generation power of renewable energy in the renewable energy power generation hydrogen production ammonia synthesis system; the determination module 602 is also used to determine the initial state of the renewable energy power generation hydrogen production ammonia synthesis system using the renewable energy power demand flexibility and energy supply flexibility; a configuration module 603, which is used to divide the time period corresponding to the production plan into multiple intervals, analyze the flexibility of the renewable energy power generation hydrogen production ammonia synthesis system in each of the intervals based on the initial state, and configure the energy storage device of the renewable energy power generation hydrogen production ammonia synthesis system based on the analysis result of the flexibility.

[0088] The embodiment of the present application can formulate a production plan for the P2A system based on the power generation output of renewable energy. Then, based on this production plan, the corresponding time period is divided into multiple intervals in the P2A system, and an interval is analyzed from the perspective of power flexibility, that is, the flexibility of the time series power space is transformed into the characteristic space. Through the energy characterization flexibility that the P2A system can provide in time windows of different widths, the energy flexibility of the P2A system is obtained to meet the energy storage parameters required by the energy flexibility of renewable energy, so that the P2A system can respond quickly to the regulation instructions of renewable energy and effectively maintain the stable operation and safety balance of the P2A system. In this way, the method provided in the embodiment of the present application is adopted to improve the evaluation accuracy of the flexibility evaluation of the P2A system, thereby improving the accuracy and reliability of the energy storage configuration.

[0089] The device 600 provided in the embodiment of the present application can execute each method in the foregoing method embodiment and realize the functions and beneficial effects of each method in the foregoing method embodiment, which will not be repeated here.

[0090] Figure 7It is one of the structural diagrams of an electronic device provided by an exemplary embodiment of the present application. Referring to the figure, at the hardware level, the electronic device in the substation includes a processor, and optionally, an internal bus, a network interface, and a memory. Among them, the memory may include a memory, such as a high-speed random access memory (Random-Access Memory, RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage, etc. Of course, the electronic device may also include hardware required for other services.

[0091] The processor, network interface and memory can be interconnected through an internal bus, which can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bidirectional arrow is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0092] The memory is used to store programs. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory may include internal memory and non-volatile memory, and provides instructions and data to the processor.

[0093] The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a device for locating the specified user at the logical level. The processor executes the program stored in the memory and is specifically used to execute: Figure 1 The method disclosed in the illustrated embodiment implements the functions and beneficial effects of each method in the previous method embodiments, which will not be described in detail here.

[0094] The above application Figure 1The method disclosed in the illustrated embodiment can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0095] The energy storage configuration device of the renewable energy power generation, hydrogen production and ammonia synthesis system can also execute the various methods in the above method embodiments, and realize the functions and beneficial effects of the various methods in the above method embodiments, which will not be repeated here.

[0096] Of course, in addition to software implementation methods, the energy storage configuration device of the renewable energy power generation, hydrogen production and ammonia synthesis system of the present application does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc., that is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0097] The present application also provides a computer-readable storage medium, which stores one or more programs. When the one or more programs are executed by an electronic device including multiple application programs, the electronic device executes Figure 1 The method disclosed in the illustrated embodiment implements the functions and beneficial effects of each method in the previous method embodiments, which will not be described in detail here.

[0098] The computer-readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0099] Furthermore, an embodiment of the present application also provides a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the following process is implemented: Figure 1 The method disclosed in the illustrated embodiment implements the functions and beneficial effects of each method in the previous method embodiments, which will not be described in detail here.

[0100] In short, the above are only preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0101] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0102] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0103] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0104] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

Claims

1. A method for energy storage configuration of a renewable energy power generation hydrogen production and ammonia synthesis system, characterized in that: include: Model each section of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain the section model of each section; Determine the objective function of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the power generation data in a predetermined time period of the area to be configured and the work section model, wherein the objective function is to maximize the total revenue of the production plan of the renewable energy power generation, hydrogen production and ammonia synthesis system; Determining the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the power generation power of renewable energy in the renewable energy power generation, hydrogen production and ammonia synthesis system; Determine the initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system by utilizing the renewable energy power demand flexibility and energy supply flexibility; The time period corresponding to the production plan is divided into a plurality of intervals, the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system in each of the intervals is analyzed based on the initial state, and the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system is configured based on the analysis results of the flexibility.

2. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1 is characterized in that: The process of modeling each section of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain the section model of each section includes: Determining the section types of the renewable energy power generation hydrogen production and ammonia synthesis system, wherein the section types include water electrolysis hydrogen production section, ammonia synthesis section and compression buffer section; A linear model is used to model the relationship between the equality constraints of the power consumption of the water electrolysis hydrogen production section, the hydrogen production flow rate, and the power consumed by the supporting auxiliary equipment, as well as the inequality relationship between the power consumption of the water electrolysis hydrogen production section and the average power consumption of the water electrolysis hydrogen production section, to obtain the water electrolysis hydrogen production section model; Constructing an inequality relationship between the ammonia yield at each moment, the synthetic ammonia load ramp rate, the upper and lower limits of the ammonia yield, and the upper and lower limits of the synthetic ammonia load ramp rate to obtain the synthetic ammonia section model; Construct an equation relationship between the hydrogen storage capacity of the hydrogen storage tank at the next moment, the hydrogen storage capacity of the hydrogen storage tank at the current moment, the hydrogen production flow rate at the next moment, and the hydrogen storage tank outlet flow rate, as well as an equation relationship between the power used by the compressor, the molar mass of hydrogen, the hydrogen production flow rate at the current moment, the compressor efficiency, the ideal gas constant, the temperature before hydrogen compression, the pressure before hydrogen compression, and the pressure after hydrogen compression, as well as an inequality relationship between the upper and lower limits of the hydrogen storage capacity of the hydrogen storage tank and the hydrogen storage capacity of the hydrogen storage tank at each moment, as well as an equation relationship between the power consumption used by air, the air flow rate, the molar mass of air, the temperature before air compression, the ideal gas constant, the pressure before air compression, the pressure after air compression, and the compressor efficiency, to obtain the compression buffer section model.

3. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1, characterized in that: The objective function of the renewable energy power generation hydrogen production and ammonia synthesis system is determined according to the power generation data of the area to be configured within a predetermined time period and the work section model, including: Determining the constraint conditions of the equality relationship and inequality relationship in each of the work section models; Determine the ammonia sales revenue, maintenance cost, investment cost and raw material cost of the renewable energy power generation hydrogen production and ammonia synthesis system according to the constraint conditions and the power generation data of the area to be configured within a predetermined time period; The maintenance cost, investment cost and raw material cost are added together to obtain the total cost of the renewable energy power generation hydrogen production and ammonia synthesis system; An equation relationship is constructed between the difference between the ammonia sales income and the total cost and the total revenue of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain the objective function.

4. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1, characterized in that: Determining the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the renewable energy power generation, hydrogen production and ammonia synthesis system comprises: Determining the analysis period of the renewable energy power generation hydrogen production and ammonia synthesis system; Integrating the power of renewable energy power generation in each analysis time window within the analysis period to obtain an upper limit and a lower limit of the demand flexibility of the renewable energy power in the analysis time window; The power generated by the renewable energy in the analysis time window is integrated to obtain the upper limit and the lower limit of the energy supply flexibility of the renewable energy power in the analysis time window.

5. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1, characterized in that: The method of determining the initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system by utilizing the renewable energy power demand flexibility and energy supply flexibility comprises: Constructing functions of the upper and lower limits of the energy supply flexibility and the initial values ​​of the renewable energy power generation hydrogen production ammonia synthesis system respectively, wherein the initial values ​​of the renewable energy power generation hydrogen production ammonia synthesis system include an initial ammonia synthesis yield, an initial hydrogen production flow rate, and an initial hydrogen reserve; A scalar function is constructed according to the upper and lower limits of energy supply flexibility in different analysis time windows; Performing polynomial approximation on the function of the initial value based on a polynomial approximation algorithm to obtain a polynomial function corresponding to the scalar function; The initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system is determined according to the equation relationship between the polynomial function and the scalar function.

6. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1, characterized in that: The dividing the time period corresponding to the production plan into a plurality of intervals, and analyzing the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system in each of the intervals based on the initial state comprises: Determining whether the energy supply flexibility in the initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system in each of the intervals meets the renewable energy power demand flexibility; If not, it indicates that the flexibility of the renewable energy power generation hydrogen production ammonia synthesis system is insufficient; if satisfied, it indicates that the flexibility of the renewable energy power generation hydrogen production ammonia synthesis system is sufficient.

7. The energy storage configuration method of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 1, characterized in that: The configuration of the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system based on the analysis result of the flexibility includes: Determine the upper and lower limits of the flexibility energy of the energy storage device according to the power of the energy storage device of the renewable energy power generation hydrogen production ammonia synthesis system; In the case where the renewable energy power generation, hydrogen production and ammonia synthesis system is not flexible enough, the energy storage device is configured using the upper and lower limits of the flexible energy of the energy storage device.

8. An energy storage configuration device for a renewable energy power generation hydrogen production ammonia synthesis system, characterized in that: include: A modeling module is used to model each section of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain a section model of each section; A determination module, used to determine the objective function of the renewable energy power generation hydrogen production ammonia synthesis system according to the power generation data in a predetermined time period of the area to be configured and the work section model, wherein the objective function is to maximize the total revenue of the production plan of the renewable energy power generation hydrogen production ammonia synthesis system; The determination module is further used to determine the renewable energy power demand flexibility and energy supply flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system according to the power generation power of renewable energy in the renewable energy power generation, hydrogen production and ammonia synthesis system; The determination module is further used to determine the initial state of the renewable energy power generation, hydrogen production and ammonia synthesis system by utilizing the renewable energy power demand flexibility and energy supply flexibility; A configuration module is used to divide the time period corresponding to the production plan into multiple intervals, analyze the flexibility of the renewable energy power generation, hydrogen production and ammonia synthesis system in each of the intervals based on the initial state, and configure the energy storage device of the renewable energy power generation, hydrogen production and ammonia synthesis system based on the analysis results of the flexibility.

9. The energy storage configuration device of the renewable energy power generation hydrogen production ammonia synthesis system according to claim 8, characterized in that: The determination module is further used to determine the constraint conditions of the equality relationship and the inequality relationship in each of the work section models; Determine the ammonia sales revenue, maintenance cost, investment cost and raw material cost of the renewable energy power generation hydrogen production and ammonia synthesis system according to the constraint conditions and the power generation data of the area to be configured within a predetermined time period; The maintenance cost, investment cost and raw material cost are added together to obtain the total cost of the renewable energy power generation hydrogen production and ammonia synthesis system; An equation relationship is constructed between the difference between the ammonia sales income and the total cost and the total revenue of the renewable energy power generation hydrogen production and ammonia synthesis system to obtain the objective function.

10. An electronic device, characterized in that: The electronic device comprises: a processor and a memory; wherein the memory is used to store computer programs that can be run on the processor; the processor is used to execute the programs stored in the memory to implement the steps of the energy storage configuration method of the renewable energy power generation, hydrogen production and ammonia synthesis system as described in any one of claims 1-7.

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