Scheduling method for wind-solar hydrogen production and synthesis ammonia adapting to wind-solar fluctuation

Abstract

The embodiment of the invention discloses a wind-solar hydrogen production ammonia synthesis scheduling method adapting to wind-solar fluctuation. The method comprises the following steps: acquiring a pre-constructed target scheduling model; determining the ammonia production amount of the wind-solar hydrogen production ammonia synthesis system and the electric energy consumption and the water consumption corresponding to a plurality of workshop sections of the wind-solar hydrogen production ammonia synthesis system, and determining an ammonia production net income item according to the ammonia production amount, the electric energy consumption and the water consumption; determining the ammonia production amount and the hydrogen production amount of the wind-solar hydrogen production synthetic ammonia system, and determining a hydrogen production and ammonia production load fluctuation penalty term according to the ammonia production amount and the hydrogen production amount; determining the wind and light abandoning electric quantity of the wind and light hydrogen production ammonia synthesis system, and determining an electricity abandoning penalty term according to the wind and light abandoning electric quantity; and substituting the determined ammonia production net income item, the hydrogen production ammonia production load fluctuation penalty item and the electricity abandoning penalty item into the target scheduling model so as to schedule the production operation loads of the plurality of workshop sections. According to the technical scheme provided by the embodiment of the invention, the stability and safety of the green ammonia production process can be improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of wind-solar hydrogen production and ammonia synthesis systems, and in particular, to a scheduling method for wind-solar hydrogen production and ammonia synthesis that adapts to wind-solar fluctuations. Background Art

[0002] With the transformation of the global energy structure and the increasingly severe climate change problems, the development and utilization of renewable energy (such as wind energy and solar energy, etc.) have become the focus of attention. However, these renewable energies are volatile, which limits their wide application in large-scale power systems. In this regard, a wind-solar hybrid power generation system, as a power generation system that effectively combines wind energy and solar energy, can solve the above problems to a certain extent.

[0003] In addition, the electrolytic water hydrogen production technology is an important link in realizing the conversion of renewable energy. Currently, ammonia synthesis can be obtained by using this electrolytic water hydrogen production technology and the air separation nitrogen production technology, which can not only effectively utilize renewable energy but also reduce carbon emissions.

[0004] In summary, combining wind-solar energy with electrolytic water hydrogen production technology to construct a wind-solar hydrogen production and ammonia synthesis system can not only improve the comprehensive utilization efficiency of renewable energy but also promote the development of a low-carbon economy.

[0005] In this regard, through practice, it is found that during the production process of wind-solar hydrogen production and ammonia synthesis (i.e., green ammonia) using a wind-solar hydrogen production and ammonia synthesis system, there is a situation where the production curve fluctuates continuously due to wind-solar fluctuations, which easily affects the stability and safety of the green ammonia production process and urgently needs to be solved. Summary of the Invention

[0006] The embodiments of the present invention provide a scheduling method for wind-solar hydrogen production and ammonia synthesis that adapts to wind-solar fluctuations to improve the stability and safety of the green ammonia production process.

[0007] According to one aspect of the present invention, a scheduling method for wind-solar hydrogen production and ammonia synthesis that adapts to wind-solar fluctuations may include:

[0008] Obtain a pre-constructed target scheduling model, where the target scheduling model at least includes a net ammonia production profit item, a hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty item to be determined;

[0009] Determine the ammonia production amount of the wind-solar hydrogen production and ammonia synthesis system and the power consumption and water consumption corresponding to multiple sections of the wind-solar hydrogen production and ammonia synthesis system respectively, and determine the net ammonia production profit item according to the ammonia production amount and each power consumption and each water consumption;

[0010] Determine the ammonia production amount and hydrogen production amount of the wind-solar hydrogen production and ammonia synthesis system, and determine the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount;

[0011] Determine the curtailed wind and photovoltaic power of the wind-solar hydrogen production and ammonia synthesis system, and determine the penalty item for curtailed power according to the curtailed wind and photovoltaic power;

[0012] Substitute the determined net ammonia production benefit item, the penalty item for load fluctuation in hydrogen production and ammonia synthesis, and the penalty item for curtailed power into the target scheduling model to schedule the production operation loads of multiple sections.

[0013] The technical solution of the embodiment of the present invention obtains a pre-constructed target scheduling model, which at least includes a to-be-determined net ammonia production benefit item, a penalty item for load fluctuation in hydrogen production and ammonia synthesis, and a penalty item for curtailed power; determine the ammonia production amount of the wind-solar hydrogen production and ammonia synthesis system and the power consumption and water consumption corresponding to multiple sections of the wind-solar hydrogen production and ammonia synthesis system respectively, and determine the net ammonia production benefit item according to the ammonia production amount and each power consumption and each water consumption; determine the ammonia production amount and hydrogen production amount of the wind-solar hydrogen production and ammonia synthesis system, and determine the penalty item for load fluctuation in hydrogen production and ammonia synthesis according to the ammonia production amount and hydrogen production amount; determine the curtailed wind and photovoltaic power of the wind-solar hydrogen production and ammonia synthesis system, and determine the penalty item for curtailed power according to the curtailed wind and photovoltaic power; thus, the determined net ammonia production benefit item, the penalty item for load fluctuation in hydrogen production and ammonia synthesis, and the penalty item for curtailed power can be substituted into the target scheduling model, so as to schedule the production operation loads of multiple sections to adapt to wind-solar fluctuations and avoid continuous fluctuations in the production curve, thereby improving the stability and safety of the green ammonia production process.

[0014] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used 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

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a flowchart of a wind-solar hydrogen production and ammonia synthesis scheduling method adapted to wind-solar fluctuations provided by an embodiment of the present invention;

[0017] Figure 2 is a flowchart of another wind-solar hydrogen production and ammonia synthesis scheduling method adapted to wind-solar fluctuations provided by an embodiment of the present invention;

[0018] Figure 3 is a flowchart of still another wind-solar hydrogen production and ammonia synthesis scheduling method adapted to wind-solar fluctuations provided by an embodiment of the present invention;

[0019] Figure 4 It is a schematic diagram of an optional example in another method for scheduling hydrogen production from wind and solar energy and ammonia synthesis that adapts to wind and solar fluctuations according to an embodiment of the present invention;

[0020] Figure 5a It is the actual output power curves of wind energy and solar energy used in an optional example with a scheduling step size ΔT = 0.25 h in another method for scheduling hydrogen production from wind and solar energy and ammonia synthesis that adapts to wind and solar fluctuations according to an embodiment of the present invention;

[0021] Figure 5b It is the actual output power curves of wind energy and solar energy used in an optional example with a scheduling step size ΔT = 1 h in another method for scheduling hydrogen production from wind and solar energy and ammonia synthesis that adapts to wind and solar fluctuations according to an embodiment of the present invention;

[0022] Figure 6 It is a structural block diagram of a device for scheduling hydrogen production from wind and solar energy and ammonia synthesis that adapts to wind and solar fluctuations according to an embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of an electronic device for implementing the method for scheduling hydrogen production from wind and solar energy and ammonia synthesis that adapts to wind and solar fluctuations in an embodiment of the present invention. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. The situations of "target", "original", etc. are similar and will not be repeated here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0026] Figure 1It is a flowchart of a power-to-ammonia scheduling method for adapting to fluctuations in wind and light provided by an embodiment of the present invention. This embodiment is applicable to the situation of scheduling the production operation loads of multiple sections of a power-to-ammonia (P2A) system, and this power-to-ammonia system can also be called a green ammonia system. This method can be executed by a power-to-ammonia scheduling device for adapting to fluctuations in wind and light provided by an embodiment of the present invention. This device can be implemented in software and / or hardware, and this device can be integrated on an electronic device, which can be various user terminals or servers.

[0027] See Figure 1 , the method of the embodiment of the present invention specifically includes the following steps:

[0028] S110. Obtain a pre-constructed target scheduling model, where the target scheduling model at least includes a net ammonia production benefit item to be determined, a hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty item.

[0029] Among them, the target scheduling model can be understood as a pre-constructed model for scheduling the production operation loads of multiple sections of a power-to-ammonia system. This model at least includes a net ammonia production benefit item to be determined, a hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty item, and these three items are described in detail later.

[0030] On this basis, combined with the application scenarios that the embodiment of the present invention may involve, optionally, the above target scheduling model can be considered to be improved on the basis of a flexible scheduling model. Because this target scheduling model can make the ammonia synthesis section in a power-to-ammonia system produce in multiple steady-state intervals, that is, it has multi-steady-state characteristics, so this target scheduling model can also be called a multi-steady-state flexible scheduling model.

[0031] S120. Determine the ammonia production amount of the power-to-ammonia system, the power consumption and water consumption corresponding to each of the multiple sections of the power-to-ammonia system respectively, and determine the net ammonia production benefit item according to the ammonia production amount, each power consumption, and each water consumption.

[0032] Among them, the power-to-ammonia system includes an electrolytic water hydrogen production section, a hydrogen compression and storage tank section, an air separation nitrogen production section, and an ammonia synthesis section. Specifically, the electrolytic water hydrogen production section usually adopts alkaline electrolytic water hydrogen production technology with mature technology, low investment cost, and long service life; the ammonia synthesis section usually adopts a mature process, which is composed of a synthesis tower, ammonia separation, and a circulation loop, etc.

[0033] On this basis, firstly, the amount of synthetic ammonia produced in the synthetic ammonia section of the wind-solar hydrogen production and ammonia synthesis system is determined, that is, the amount of ammonia produced is determined; secondly, for each section in the wind-solar hydrogen production and ammonia synthesis system, the power consumption and water consumption of the section are determined. In an embodiment of the present invention, optionally, the water consumption can be the first part of the consumption of circulating water in the air separation nitrogen production section, the second part of the consumption of circulating water in the synthetic ammonia section, or the third part of the consumption of process water in the electrolysis water hydrogen production section, etc.

[0034] Furthermore, the net income item of ammonia production can be determined according to the ammonia production amount and the electricity consumption and water consumption corresponding to each process section, that is, the net income item of ammonia production can be used to characterize the net income obtained by the wind-solar hydrogen-to-ammonia synthesis system through ammonia production.

[0035] S130. Determine the ammonia production and hydrogen production of the wind-solar hydrogen-to-ammonia synthesis system, and determine the hydrogen-to-ammonia production load fluctuation penalty item based on the ammonia production and hydrogen production amounts.

[0036] Among them, since the synthetic ammonia process is carried out under high-pressure reaction conditions, the variable load process will cause fatigue of the pressure vessel. However, within the life cycle of the equipment, the number of fatigue times is limited. When the upper limit of the fatigue number is reached, the equipment needs to be replaced in time, resulting in high equipment maintenance costs. In addition to causing equipment fatigue, the variable load process may also cause the synthesis tower to "fly high". Therefore, it is necessary to avoid variable load actions in the synthetic ammonia process as much as possible and produce as smoothly as possible.

[0037] In summary, a penalty item for hydrogen and ammonia production load fluctuation is set in the target scheduling model (i.e., the hydrogen and ammonia production load fluctuation is taken as the penalty item), and the penalty item is determined based on the ammonia production and hydrogen production of the wind and solar hydrogen production and ammonia synthesis system.

[0038] S140. Determine the amount of abandoned wind and solar power in the wind-solar hydrogen-to-ammonia synthesis system, and determine the penalty item for abandoned wind and solar power based on the amount of abandoned wind and solar power.

[0039] Among them, in order to reduce the power abandonment in the process of solving the target scheduling model, a power abandonment penalty item is set in the target scheduling model (that is, the wind and solar power abandonment amount is used as the penalty item). This penalty item can be determined according to the wind and solar power abandonment amount of the wind and solar power hydrogen production and ammonia synthesis system. The wind and solar power abandonment amount can be understood as the abandoned wind and solar power generation amount.

[0040] S150. Substitute the determined ammonia production net income item, hydrogen and ammonia production load fluctuation penalty item, and power abandonment penalty item into the target scheduling model to schedule the production operation load of multiple work sections.

[0041] Among them, the determined net ammonia production profit item, the penalty item for the load fluctuation of hydrogen production and ammonia synthesis, and the penalty item for curtailed electricity are substituted into the target scheduling model, and the solver is used for optimization calculation to obtain the scheduling result of the parameters in the wind-solar hydrogen production and ammonia synthesis system, so as to schedule the production operation loads of multiple sections according to this scheduling result. It should be noted that the type of the solver can be selected according to actual needs and is not specifically limited herein; the parameters can be hydrogen production flow rate or ammonia production flow rate, etc., which is related to the actual situation and is not specifically limited herein.

[0042] On this basis, combined with the application scenarios that the embodiments of the present invention may involve, optionally, on the one hand, the target scheduling model can be an objective function; on the other hand, for the three determined items, they are not specific numerical values but mathematical expressions containing parameters (i.e., unknown terms). Therefore, the unknown terms in the objective function can be solved iteratively to optimize the objective function, and the production operation load scheduling is carried out based on the finally solved unknown terms.

[0043] The above technical solution has at least the following technical effects:

[0044] (1) Aiming at the situation that the production load curve in the process of wind-solar hydrogen production and ammonia synthesis continuously fluctuates due to tracking the fluctuations of wind and light, based on the concept of multi-steady-state flexible scheduling production, a multi-steady-state flexible scheduling method suitable for green ammonia production is proposed. By scheduling the production operation loads of different sections in the wind-solar hydrogen production and ammonia synthesis system, the multi-steady-state flexible production load curve basically presents a stepped shape, and there is a continuous smooth curve transition at the connection. Essentially, the storage / electricity consumption of the hydrogen storage buffer tank is used to reduce the fluctuation between the electricity load scheduling curve and the mean line of the ideal electricity consumption of the power supply, so that the obtained electricity load scheduling curve can meet the multi-steady-state flexible requirements of the chemical industry, and the ammonia synthesis section operates in multiple steady-state intervals, thus adapting to the volatility of wind and light, and thereby improving the stability and safety of the green ammonia production process.

[0045] (2) Based on the mass and energy balance data, an optimization model is used to determine the economically optimal design, which defines the most economic combination of wind and solar power sources, each flexible subsystem (water electrolysis and ammonia synthesis) and storage capacity, as well as the optimal hourly scheduling of the material and energy flows between different units of the system.

[0046] (3) Based on the idea of multi-steady-state flexible production, a time-series scheduling control model of the wind-solar hydrogen production and ammonia synthesis system is constructed. On this basis, the final multi-steady-state flexible scheduling model can also be constructed through an optimization objective function based on weights.

[0047] (4) The optimization time of the proposed multi-steady-state flexible scheduling method is in seconds, which is easy to solve in real time and can provide online scheduling requirements for the "electricity - green hydrogen - green ammonia" integrated coupling system.

[0048] In the technical solution of the embodiment of the present invention, by obtaining a pre-constructed target scheduling model, the target scheduling model at least includes an ammonia production net profit item to be determined, a hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty item; determining the ammonia production amount of the wind-solar hydrogen production and ammonia synthesis system and the power consumption and water consumption corresponding to multiple sections of the wind-solar hydrogen production and ammonia synthesis system respectively, and determining the ammonia production net profit item according to the ammonia production amount and each power consumption and each water consumption; determining the ammonia production amount and hydrogen production amount of the wind-solar hydrogen production and ammonia synthesis system, and determining the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount; determining the curtailment amount of wind and photovoltaic power of the wind-solar hydrogen production and ammonia synthesis system, and determining the curtailment penalty item according to the curtailment amount of wind and photovoltaic power; thus, the determined ammonia production net profit item, hydrogen production and ammonia production load fluctuation penalty item, and curtailment penalty item can be substituted into the target scheduling model, so as to schedule the production operation load of multiple sections to adapt to the fluctuations of wind and light, avoid the situation of continuous fluctuations in the production curve, and thus improve the stability and safety of the green ammonia production process.

[0049] An alternative technical solution is that the ammonia production amount may include the current ammonia production amount at the current moment and the previous ammonia production amount at the previous moment of the current moment, and the hydrogen production amount includes the current hydrogen production amount at the current moment and the previous hydrogen production amount at the previous moment. Then, determining the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount includes:

[0050] Calculating the absolute value of the ammonia production difference between the current ammonia production amount and the previous ammonia production amount, and the absolute value of the hydrogen production difference between the current hydrogen production amount and the previous hydrogen production amount;

[0051] Determining the hydrogen production and ammonia production load fluctuation penalty item according to the absolute value of ammonia production and the absolute value of hydrogen production.

[0052] In the above technical solution, the accurate determination of the hydrogen production and ammonia production load fluctuation penalty item is realized through the absolute value of the ammonia production difference that can represent the ammonia production difference between two adjacent moments and the absolute value of the hydrogen production difference that can represent the hydrogen production difference between two adjacent moments. On this basis, combined with the application scenarios that this technical solution may involve, optionally, in addition to using the two absolute values, the penalty coefficients corresponding to them can also be used to determine the hydrogen production and ammonia production load fluctuation penalty item, so as to clarify the penalty intensity given for ammonia production and hydrogen production respectively.

[0053] On this basis, optionally, determining the hydrogen production and ammonia production load fluctuation penalty item according to the absolute value of ammonia production and the absolute value of hydrogen production includes:

[0054] Obtaining the ammonia production penalty coefficient and the hydrogen production penalty coefficient;

[0055] Obtaining the ammonia production load fluctuation penalty item according to the ammonia production penalty coefficient and the absolute value of ammonia production;

[0056] Based on the hydrogen production penalty coefficient and the absolute value of hydrogen production, a penalty term for hydrogen production load fluctuation is obtained;

[0057] Based on the penalty term for ammonia production load fluctuation and the penalty term for hydrogen production load fluctuation, a penalty term for hydrogen production and ammonia production load fluctuation is obtained.

[0058] In the above technical solution, by setting the ammonia production penalty coefficient and the hydrogen production penalty coefficient, the penalty intensities for ammonia production and hydrogen production are clarified respectively, thereby effectively ensuring the stable production of synthetic ammonia.

[0059] Another alternative technical solution is to determine the penalty term for curtailment based on the curtailment of wind and photovoltaic power, including:

[0060] Obtain the wind and photovoltaic power prices, and determine the penalty term for curtailment based on the wind and photovoltaic power prices and the curtailment of wind and photovoltaic power.

[0061] In the above technical solution, by combining the wind and photovoltaic power prices on the basis of the curtailment of wind and photovoltaic power, the economic loss caused by curtailment is obtained, thereby realizing the accurate determination of the penalty term for curtailment.

[0062] On this basis, optionally, determining the penalty term for curtailment based on the wind and photovoltaic power prices and the curtailment of wind and photovoltaic power includes:

[0063] Obtain the curtailment penalty coefficient, and determine the penalty term for curtailment based on the curtailment penalty coefficient, the wind and photovoltaic power prices, and the curtailment of wind and photovoltaic power.

[0064] In the above technical solution, by setting the curtailment penalty coefficient, the penalty intensity for curtailment is clarified, so as to better ensure the stable production of synthetic ammonia.

[0065] Figure 2 It is a flowchart of another method for scheduling hydrogen production from wind and photovoltaic power for synthetic ammonia production that adapts to wind and photovoltaic fluctuations provided in an embodiment of the present invention. This embodiment is optimized based on the above technical solutions. In this embodiment, optionally, determining the net ammonia production income item according to the ammonia production volume, each power consumption, and each water consumption may include: obtaining the ammonia selling price, and determining the ammonia selling income according to the ammonia production volume and the ammonia selling price; determining the system power consumption of the wind and photovoltaic hydrogen production for synthetic ammonia system according to each power consumption, obtaining the wind and photovoltaic power prices, and determining the power consumption cost according to the system power consumption and the wind and photovoltaic power prices; determining the utility water cost according to each water consumption; determining the net ammonia production income item according to the ammonia selling income, the power consumption cost, and the utility water cost. Among them, the explanations of the same or corresponding terms as those in the above embodiments are not repeated here.

[0066] See Figure 2 This embodiment of the method may specifically include the following steps:

[0067] S210. Obtain the pre - constructed target scheduling model, where the target scheduling model at least includes the to - be - determined net ammonia production profit item, the hydrogen - production - and - ammonia - production load fluctuation penalty item, and the curtailment penalty item.

[0068] S220. Determine the ammonia production amount of the wind - and - solar - hydrogen - production - and - ammonia - synthesis system, as well as the power consumption and water consumption corresponding to multiple sections of the wind - and - solar - hydrogen - production - and - ammonia - synthesis system respectively.

[0069] S230. Obtain the ammonia selling price, and determine the ammonia sales revenue according to the ammonia production amount and the ammonia selling price.

[0070] Among them, according to the price of synthetic ammonia sold (i.e., the ammonia selling price) and the ammonia production amount, the ammonia sales revenue can be determined.

[0071] S240. Determine the system power consumption of the wind - and - solar - hydrogen - production - and - ammonia - synthesis system according to each power consumption, obtain the wind - and - solar power price, and determine the power consumption cost according to the system power consumption and the wind - and - solar power price.

[0072] Among them, according to the power consumption corresponding to multiple sections respectively, the system power consumption of the entire wind - and - solar - hydrogen - production - and - ammonia - synthesis system can be determined. On this basis, combined with the wind - and - solar power price, the power consumption cost can be determined.

[0073] S250. Determine the utility water consumption cost according to each water consumption.

[0074] Among them, similar to the above steps, the utility water consumption cost can be determined.

[0075] S260. Determine the net ammonia production profit item according to the ammonia sales revenue, the power consumption cost, and the utility water consumption cost.

[0076] Among them, according to the contents determined by using S230 - S250 respectively, the net ammonia production profit item can be determined. For example, the result of ammonia sales revenue - power consumption cost - utility water consumption cost can be used as the net ammonia production profit item.

[0077] S270. Determine the ammonia production amount and hydrogen production amount of the wind - and - solar - hydrogen - production - and - ammonia - synthesis system, and determine the hydrogen - production - and - ammonia - production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount.

[0078] S280. Determine the wind and solar curtailment power amount of the wind - and - solar - hydrogen - production - and - ammonia - synthesis system, and determine the curtailment penalty item according to the wind and solar curtailment power amount.

[0079] S290. Substitute the determined net ammonia production profit item, the hydrogen - production - and - ammonia - production load fluctuation penalty item, and the curtailment penalty item into the target scheduling model to schedule the production operation loads of multiple sections.

[0080] The technical solution of the embodiment of the present invention realizes the accurate determination of the net ammonia production income item by determining the ammonia sales income, the electricity consumption cost, and the utility water consumption cost.

[0081] An alternative technical solution is that each water consumption can include the first part of the consumption of circulating water in the air separation nitrogen production section, the second part of the consumption of circulating water in the synthetic ammonia section, and the third part of the consumption of process water in the electrolytic water hydrogen production section. Then, according to each water consumption, the utility water consumption cost is determined, including:

[0082] Obtain the unit price of the circulating water, and determine the cooling and heat exchange circulating water cost according to the unit price of the circulating water, the first part of the consumption, and the second part of the consumption;

[0083] Obtain the unit price of the process water, and determine the process water cost according to the unit price of the process water and the third part of the consumption;

[0084] Determine the utility water consumption cost according to the cooling and heat exchange circulating water cost and the process water cost.

[0085] Among them, in the actual application scenario, circulating water is used in the air separation nitrogen production section and the synthetic ammonia section, and process water is used in the electrolytic water hydrogen production section. Therefore, the cooling and heat exchange circulating water cost of the circulating water and the process water cost of the process water can be determined by combining the unit prices and consumptions corresponding to the two types of water, and then the utility water consumption cost can be accurately determined by combining these two costs.

[0086] Another alternative technical solution is to determine the net ammonia production income item according to the ammonia sales income, the electricity consumption cost, and the utility water consumption cost, including:

[0087] Obtain the price of potassium hydroxide and the amount of potassium hydroxide consumed in the electrolytic water hydrogen production process in the alkaline electrolytic cell, and determine the potassium hydroxide cost according to the price of potassium hydroxide and the amount of potassium hydroxide;

[0088] Determine the net ammonia production income item according to the ammonia sales income, the electricity consumption cost, the utility water consumption cost, and the potassium hydroxide cost.

[0089] In the above technical solution, on the basis of the ammonia sales income, the electricity consumption cost, and the utility water consumption cost, the potassium hydroxide (KOH) cost is also combined, thereby improving the accuracy of the determined net ammonia production income item.

[0090] In order to more vividly understand the above technical solutions, specific examples are described below.

[0091] Step 1: Establish relevant models for the power consumption in the electrolytic water hydrogen production section, the hydrogen compression and storage tank section, the air separation nitrogen production section, and the synthetic ammonia section respectively.

[0092] (1) Establish a relevant model for the power consumption in the electrolytic water hydrogen production section

[0093] Due to the single-unit capacity limitation, the electrolytic water hydrogen production section often consists of multiple hydrogen production units forming a cluster to meet the hydrogen supply flow requirements for chemical synthesis. Although the available load range of a single electrolytic cell is approximately 20% - 100%, for multiple electrolytic cells, through the combination of unit start-stop and load distribution, the cluster load can vary continuously within the range of 5% - 100%, and the energy conversion efficiency is close to linear. Therefore, in this example, a linear model is used to model the relationship between the power consumption and the hydrogen production flow, as follows:

[0094]

[0095]

[0096]

[0097]

[0098] In equations (1) to (4), is the power consumption per hour of the electrolytic water hydrogen production section at time t (i.e., the current time); P P2H，0 is the power consumption of the auxiliary equipment supporting the electrolytic cell per hour at time t, including circulation pumps, pneumatic instruments, measurement and control, and separation and purification devices, etc.; c P2H is the hydrogen production power consumption, regarded as a constant coefficient. In this example, it is taken as 4.8 kWh / Nm 3 , that is, 4.8 degrees of electric energy are consumed for every 1 standard cubic meter of hydrogen produced; is the hydrogen production flow per hour of the electrolytic water hydrogen production section at time t; is the upper limit of the hydrogen production power; is the consumption of the process water used in the electrolytic water hydrogen production section (i.e., the consumption of the third part described above); in this example, cw P2H is taken as 0.8 kg / Nm 3 , that is, 0.8 kg of pure process water is consumed for every 1 standard cubic meter of hydrogen produced; is the amount of potassium hydroxide consumed (i.e., the amount of KOH) in the process of electrolyzing water to produce hydrogen in an alkaline electrolytic cell; in this example, cKOH P2H is taken as 0.0004 kg / Nm 3 , that is, 0.0004 kg of KOH is consumed for every 1 standard cubic meter of hydrogen produced.

[0099] Since the auxiliary power is not a fixed value under different hydrogen production loads, in this example, the auxiliary power and the electrolytic cell power are linearly correlated, and let where c P2H，aux is the auxiliary power coefficient.

[0100] (2) Establish a relevant model for the power consumption in the hydrogen compression and storage tank section

[0101] The load regulation speed of the electrolytic water hydrogen production section is at the second / minute level, while that of the chemical synthesis section is at the hour / day level. A buffer link needs to be configured between the two to meet the requirement of stable hydrogen supply for chemical synthesis. Therefore, establish a relationship model between the power consumption in the hydrogen compression and storage tank section and the hydrogen consumption for synthetic ammonia, as follows:

[0102]

[0103] SOH min ≤SOH t ≤SOH max (6)

[0104]

[0105] In formulas (5) to (7), is the hydrogen storage at time t + 1, is the hydrogen storage at time t; ΔT is the scheduling step; is the hourly hydrogen consumption for synthetic ammonia at time t + 1; SOH min represents the lower limit constraint of the capacity of the hydrogen storage tank (Nm 3 ); SOH max represents the upper limit constraint of the capacity of the hydrogen storage tank (Nm 3 ); is the hourly hydrogen compression power consumption at time t (MW·h); c COMP，0 is the constant term of the power consumption of the hydrogen compressor; c COMP is the power consumption coefficient of the hydrogen compressor; is the hourly hydrogen consumption for synthetic ammonia at time t (Nm 3 ).

[0106] (3) Establish a relevant model for the power consumption in the air separation nitrogen production section

[0107] The nitrogen required for synthetic ammonia is obtained by low-temperature air separation, and high-purity nitrogen is obtained by separating each component according to the different boiling points of each component in liquefied air. This process requires a multi-stage compressor to gradually pressurize the air from atmospheric pressure, and an expander is needed to provide the cold source for the air separation process. At the same time, nitrogen, as an inert gas, has different properties from hydrogen. Although both are raw materials for synthetic ammonia, in the process of variable load due to fluctuations in wind and light, the air separation nitrogen production section is different from the electrolytic water hydrogen production section. It does not need to frequently increase or decrease the load, and only needs to track the raw material demand load of the synthetic ammonia section.

[0108] Since the hydrogen-nitrogen ratio of the feedstock for ammonia synthesis is generally 3:1, for the sake of simplifying the model, the amount of nitrogen related to the power consumption in the air separation nitrogen production section is approximately replaced by the hydrogen demand in the ammonia synthesis section in this example. Similarly, a linear model is adopted to establish the relationship between the power consumption and the ammonia synthesis hydrogen consumption in the air separation nitrogen production section, as follows:

[0109]

[0110]

[0111] In equations (8) and (9), is the power consumption per hour of the air separation nitrogen production section at time t; c ASU，0 is the constant term of power consumption for air separation nitrogen production; c ASU is the power consumption coefficient for air separation nitrogen production; represents the consumption of circulating water per hour of the air separation nitrogen production section at time t (i.e., the first part of the consumption described above); CRW ASU，0 is the constant term of circulating water consumption for air separation nitrogen production; crw ASU is the circulating water consumption coefficient for air separation nitrogen production; is the hydrogen consumption for ammonia synthesis per hour of the air separation nitrogen production section at time t.

[0112] (4) Establish a relevant model for the power consumption in the ammonia synthesis section

[0113] Since both the active temperature and pressure of the catalyst have a certain applicable range, the load level of the chemical ammonia synthesis section can be adjusted within a certain range. However, in the ammonia synthesis process flow, in addition to the reactor, the ammonia synthesis section also includes unit processes such as compression, heat exchange, and separation. These chemical unit processes are coupled in multiple physical senses of "electricity - heat - mass" and jointly determine the load flexibility of the chemical ammonia synthesis section with the flexibility of the ammonia synthesis reaction process.

[0114] This example involves the production of ammonia using the traditional Haber - Bosch process, and the reaction is as follows:

[0115]

[0116] Constrained by thermodynamic equilibrium and catalyst activity, etc., the load rate η t of the ammonia synthesis unit should be maintained within a given range:

[0117] η min ≤η t ≤η max (11)

[0118] In equation (11), η max is the upper limit of the load rate of the ammonia synthesis unit. In this example, it is taken as 110%; η minIt is the lower limit of the load rate of the ammonia synthesis unit, and 30% is taken in this example.

[0119] Assume that the designed load of the ammonia synthesis unit is Then:

[0120]

[0121] At the same time, in order to avoid the temperature and pressure of each process link such as the ammonia synthesis reactor, ammonia separation, circulation, and heat exchange exceeding the limit, the load adjustment rate of the ammonia synthesis unit is restricted; moreover, the lower the load rate of the unit, the lower the adjustable rate of the load, and vice versa. Define the load adjustment rate coefficient Then:

[0122]

[0123]

[0124]

[0125] In formulas (13) to (15), represents the maximum value of the upward adjustment of the load adjustment rate coefficient, and 0.15 / hour is taken in this example -1 ; represents the maximum value of the downward adjustment of the load adjustment rate coefficient, and -0.25 / hour is taken in this example -1 . The rationality of the above constraints was verified through a dynamic model.

[0126] Among them, in order to connect the entire electric-hydrogen-ammonia system, the hydrogen consumption per ton of ammonia synthesis was linearly fitted as follows based on dynamic simulation and actual industrial data:

[0127]

[0128] In formula (16), c SYN，NH3 represents the hydrogen consumption per ton of ammonia synthesis, and 1963.41 Nm 3 / t is taken in this example.

[0129] Processes such as ammonia separation, circulation, and compression in the ammonia synthesis section all consume a certain amount of electricity. Establish a relationship model between the power consumption and ammonia synthesis output in the ammonia synthesis section, as follows:

[0130]

[0131] In formula (17), is the power consumption per hour of the ammonia synthesis section at time t, with the unit of kW·h; is the constant term of ammonia synthesis power consumption; is the ammonia synthesis power consumption coefficient; The ammonia production amount per hour in the ammonia synthesis section at time t, with the unit of t / h.

[0132] Furthermore, the formula for calculating the consumption of utility heat exchange and cooling water in the ammonia synthesis section is as follows:

[0133]

[0134] In formula (18), is the second part of the consumption of circulating water in the ammonia synthesis section, with the unit of t / h; and are the constant term and coefficient of the circulating water consumption for ammonia synthesis respectively.

[0135] Step 2: Considering the off-grid operation mode, obtain the system power consumption of the wind-solar hydrogen production ammonia synthesis system.

[0136] The green ammonia system can be divided into grid-connected type and off-grid type according to the access method. The grid-connected green ammonia system can obtain frequency and voltage support from the external power grid, which reduces the complexity of operation control. However, the costs of grid connection and power consumption are relatively high. In addition, the grid-connected green ammonia system faces multiple challenges in terms of economic feasibility, regulatory approval process, and obtaining green certification. The off-grid green ammonia system does not strictly rely on the external power grid and can be flexibly scheduled and regulated according to wind-solar resources and hydrogen demand, with advantages such as low power cost and no off-grid operation restrictions. Therefore, this example mainly considers the off-grid green ammonia system.

[0137] The wind-solar operation power of the ammonia synthesis system is as follows:

[0138]

[0139] Among them, respectively represent the wind power generation power and photovoltaic power generation power per hour at time t.

[0140] When considering the off-grid operation mode, the overall power consumption of the system does not exceed the sum of local wind and light output:

[0141]

[0142]

[0143] In formulas (19) to (21), P t is the system power consumption; is the power consumption of the electrolytic water hydrogen production section per hour at time t; is the power consumption of the ammonia synthesis section per hour at time t; is the power consumption of the air separation nitrogen production section per hour at time t; is the power consumption of the hydrogen compression section per hour at time t; Represents the hourly electrical energy consumption of renewable energy at time t.

[0144] Step 3: Calculate the net ammonia production profit.

[0145] The financial factors to be considered in the revenue of the ammonia synthesis plant mainly include the revenue from ammonia sales, electricity cost, utility water cost, and KOH cost, etc. Therefore, the net ammonia production profit item is as follows:

[0146]

[0147] In Equation (22), is the ammonia selling price; is the ammonia production amount at time t; is the wind-solar electricity price; P t is the system electrical energy consumption; T is the scheduling period; ∑C t is the utility water cost and KOH cost, as follows:

[0148] In Equation (23), c cw represents the unit price of circulating water, c crw represents the unit price of process water; c KOH is the KOH price; is the consumption of the third part described above; is the consumption of the first part described above; is the consumption of the second part described above; is the KOH amount described above.

[0149] Step 4: Establish a multi-steady-state flexible scheduling model.

[0150] According to the above description, due to the possible equipment fatigue and "temperature runaway" of the synthesis tower, it is necessary to avoid variable load operations in the ammonia synthesis process as much as possible and produce as smoothly as possible. Therefore, the following load fluctuation penalty terms for hydrogen production and ammonia production are set

[0151]

[0152] In Equation (24), is the current ammonia production amount; is the previous ammonia production amount; is the current hydrogen production amount; is the previous hydrogen production amount; a is the undetermined ammonia production penalty coefficient; b is the undetermined hydrogen production penalty coefficient.

[0153] To reduce the curtailment of electricity during the model solution process, a curtailment penalty term is set

[0154]

[0155] In formula (25), c pr，RES is the wind-solar power price; is the hourly wind and solar curtailment power at time t; c is the undetermined curtailment penalty coefficient.

[0156] Figure 3 is a flowchart of still another method for dispatching wind-solar hydrogen production and ammonia synthesis to adapt to wind-solar fluctuations provided in an embodiment of the present invention. This embodiment is optimized based on the above technical solutions. In this embodiment, optionally, the target scheduling model further includes a net ammonia production revenue weight corresponding to the net ammonia production revenue item, a hydrogen production and ammonia synthesis load fluctuation penalty weight corresponding to the hydrogen production and ammonia synthesis load fluctuation penalty item, and a curtailment penalty weight corresponding to the curtailment penalty item. Among them, the explanations of the same or corresponding terms as those in the above embodiments will not be repeated here.

[0157] Refer to Figure 3 , the method of this embodiment may specifically include the following steps:

[0158] S310. Obtain a pre-constructed target scheduling model, where the target scheduling model includes a to-be-determined net ammonia production revenue item, a hydrogen production and ammonia synthesis load fluctuation penalty item, and a curtailment penalty item, as well as a determined net ammonia production revenue weight corresponding to the net ammonia production revenue item, a hydrogen production and ammonia synthesis load fluctuation penalty weight corresponding to the hydrogen production and ammonia synthesis load fluctuation penalty item, and a curtailment penalty weight corresponding to the curtailment penalty item.

[0159] Among them, the net ammonia production revenue weight can reflect the influence degree of the net ammonia production revenue item on the target scheduling function, the hydrogen production and ammonia synthesis load fluctuation penalty weight can reflect the influence degree of the hydrogen production and ammonia synthesis load fluctuation penalty item on the target scheduling function, and the curtailment penalty weight can reflect the influence degree of the curtailment penalty item on the target scheduling function. Therefore, by setting the corresponding weights, the influence degrees of different items can be controlled.

[0160] On this basis, combined with the above example, exemplarily, the target scheduling model ObjFun can be expressed as:

[0161]

[0162] In formula (26), weight1 represents the net ammonia production revenue weight, weight2 represents the hydrogen production and ammonia synthesis load fluctuation penalty weight, and weight3 represents the curtailment penalty weight.

[0163] Based on the target scheduling model ObjFun provided in this example, various scheduling strategies can be formed through different weight combinations, providing more operation decision-making options for schedulers. For example, if it is necessary to set the optimal comprehensive benefit plan, the degree of consideration for each weight can be made equivalent, so that the ammonia production, electricity sales revenue, and production stability can all reach the best under mutual balance, and the comprehensive benefit is optimal; another example is to design a scheduling plan with the best production stability. Considering equipment fatigue and depreciation, more attention is paid to stable production within the allowable range of load fluctuations.

[0164] S320. Determine the ammonia production amount of the hydrogen production and ammonia synthesis system using wind and light, and the power consumption and water consumption corresponding to multiple sections of the hydrogen production and ammonia synthesis system using wind and light respectively, and determine the net ammonia production revenue item according to the ammonia production amount and each power consumption and each water consumption.

[0165] S330. Determine the ammonia production amount and hydrogen production amount of the hydrogen production and ammonia synthesis system using wind and light, and determine the penalty item for load fluctuation of hydrogen production and ammonia synthesis according to the ammonia production amount and hydrogen production amount.

[0166] S340. Determine the wind and light abandonment power of the hydrogen production and ammonia synthesis system using wind and light, and determine the penalty item for electricity abandonment according to the wind and light abandonment power.

[0167] S350. Substitute the determined net ammonia production revenue item, the penalty item for load fluctuation of hydrogen production and ammonia synthesis, and the penalty item for electricity abandonment into the target scheduling model to schedule the production operation load of multiple sections.

[0168] The technical solution of the embodiment of the present invention can effectively control the influence degree of each item on the target scheduling model by setting corresponding weight items for each item in the target scheduling model, so as to meet the actual scheduling requirements.

[0169] An optional technical solution is that the above-mentioned hydrogen production and ammonia synthesis scheduling method using wind and light may further include: in response to a weight adjustment instruction, adjust the target weight among the net ammonia production revenue weight, the penalty weight for load fluctuation of hydrogen production and ammonia synthesis, and the penalty weight for electricity abandonment, and update the target weight according to the adjustment result.

[0170] The above-mentioned technical solution allows schedulers to adjust the target weight that needs to be adjusted among all weights according to actual scheduling requirements, thereby realizing the free design of various scheduling strategies.

[0171] On this basis, to verify the effectiveness of the above-mentioned proposed technical solutions, the following combines an example of flexible scheduling of green ammonia with multiple steady states adapted to wind and light fluctuations, and combines a construction example of a certain under-construction project for illustration.

[0172] Exemplarily, using Figure 4An example of multi-steady-state flexible scheduling for adapting to wind and light fluctuations is shown. In combination with the base case, the upper limit of the power of electrolytic hydrogen production is 110 MW; the rated production capacity of synthetic ammonia is 11.6 tons per hour; the storage capacity range of the hydrogen buffer tank is [8000 Nm 3 , 80000 Nm 3 . The initial storage capacity of the buffer tank is set to 40000 Nm 3 . The P2A system is jointly powered by a photovoltaic power station and a wind farm. The comprehensive electricity price of direct power supply is about 0.2 yuan / kWh, and the selling price of the product ammonia is about 3000 yuan / ton.

[0173] Based on the multi-steady-state flexible process, the scheduling period of the P2A system is taken as 24 hours, and the scheduling step sizes ΔT are set to 0.25 and 1 hour respectively, that is, T = 96 and T = 24. The total power generation of wind and light is the same for the two scheduling step sizes, and the output curves of wind and light power generation are both based on historical actual operation data, as Figure 5a and Figure 5b shown.

[0174] The P2A system is modeled as a Mixed-Integer Linear Programing (MILP) problem and optimized and calculated using a solver. The results show that:

[0175] 1) Through the example verification of the scheduling step sizes ΔT = 0.25 h and ΔT = 1 h within the 24-hour scheduling period, it is proved that the multi-steady-state flexible scheduling has a more stable green ammonia production process and better comprehensive benefits compared with the flexible scheduling method. The number of load fluctuations of the multi-steady-state flexible scheduling method is reduced by 50% compared with the flexible scheduling method, and the comprehensive economic benefits are increased by 29.43% and 29.39% respectively, which can provide a powerful scheduling tool for green ammonia production and assist the safe, stable and economic operation of green ammonia production.

[0176] 2) From the scheduling results, the longer the scheduling step size, the greater the space utilization rate of the hydrogen storage tank, the smoother the ammonia production curve, the less the abandoned power of the multi-steady-state scheduling method, and the comprehensive income increases by 0.21%, and the calculation time decreases by 8.33%. Therefore, the scheduling optimization effect of the scheduling step size ΔT = 1 h is slightly better than that of ΔT = 0.25 h.

[0177] It can be seen that the above example constructs a time-sequence scheduling control model for the wind and light electrolytic hydrogen synthetic ammonia system, and obtains the final multi-steady-state flexible scheduling model through the construction of an optimization objective function based on weights, which can provide online scheduling requirements for the "electricity - green hydrogen - green ammonia" integrated coupling system.

[0178] Figure 6This is the structural block diagram of the wind-solar hydrogen production and ammonia synthesis scheduling device provided in the embodiments of the present invention. This device is used to execute the wind-solar hydrogen production and ammonia synthesis scheduling method provided in any of the above embodiments. This device and the wind-solar hydrogen production and ammonia synthesis scheduling methods in the above embodiments belong to the same inventive concept. For the details not described in detail in the embodiments of the wind-solar hydrogen production and ammonia synthesis scheduling device, reference can be made to the embodiments of the above wind-solar hydrogen production and ammonia synthesis scheduling method. See Figure 6 Specifically, this device may include: a model acquisition module 410, an ammonia production net income item determination module 420, a hydrogen production and ammonia production load fluctuation penalty item determination module 430, a curtailment penalty item determination module 440, and a scheduling module 450. Among them,

[0179] The model acquisition module 410 is configured to acquire a pre-constructed target scheduling model, where the target scheduling model at least includes an ammonia production net income item, a hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty item to be determined;

[0180] The ammonia production net income item determination module 420 is configured to determine the ammonia production amount of the wind-solar hydrogen production and ammonia synthesis system, the power consumption and water consumption corresponding to multiple sections of the wind-solar hydrogen production and ammonia synthesis system respectively, and determine the ammonia production net income item according to the ammonia production amount, each power consumption, and each water consumption;

[0181] The hydrogen production and ammonia production load fluctuation penalty item determination module 430 is configured to determine the ammonia production amount and hydrogen production amount of the wind-solar hydrogen production and ammonia synthesis system, and determine the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount;

[0182] The curtailment penalty item determination module 440 is configured to determine the wind and photovoltaic curtailment power of the wind-solar hydrogen production and ammonia synthesis system, and determine the curtailment penalty item according to the wind and photovoltaic curtailment power;

[0183] The scheduling module 450 is configured to substitute the determined ammonia production net income item, hydrogen production and ammonia production load fluctuation penalty item, and curtailment penalty item into the target scheduling model to schedule the production operation loads of multiple sections.

[0184] Optionally, the ammonia production net income item determination module 420 may include:

[0185] The ammonia sales revenue determination sub-module is configured to acquire the ammonia selling price and determine the ammonia sales revenue according to the ammonia production amount and the ammonia selling price;

[0186] The power consumption cost determination sub-module is configured to determine the system power consumption of the wind-solar hydrogen production and ammonia synthesis system according to each power consumption, acquire the wind-solar power price, and determine the power consumption cost according to the system power consumption and the wind-solar power price;

[0187] The utility engineering water cost determination sub-module is used to determine the utility engineering water cost according to the water consumption amounts.

[0188] The net ammonia production profit item determination sub-module can be used to determine the net ammonia production profit item according to the ammonia sales revenue, the electricity cost, and the utility engineering water cost.

[0189] On this basis, optionally, the water consumption amounts include the first part of the consumption of circulating water in the air separation nitrogen production section, the second part of the consumption of circulating water in the synthetic ammonia section, and the third part of the consumption of process water in the electrolytic water hydrogen production section. Then, the utility engineering water cost determination sub-module may include:

[0190] The cooling and heat exchange circulating water cost determination unit is used to obtain the unit price of the circulating water and determine the cooling and heat exchange circulating water cost according to the unit price of the circulating water, the first part of the consumption amount, and the second part of the consumption amount.

[0191] The process water cost determination unit is used to obtain the unit price of the process water and determine the process water cost according to the unit price of the process water and the third part of the consumption amount.

[0192] The utility engineering water cost determination unit is used to determine the utility engineering water cost according to the cooling and heat exchange circulating water cost and the process water cost.

[0193] Another option is that the net ammonia production profit item determination sub-module may include:

[0194] The potassium hydroxide cost determination unit can be used to obtain the potassium hydroxide price and the amount of potassium hydroxide consumed in the electrolytic water hydrogen production process in the alkaline electrolyzer, and determine the potassium hydroxide cost according to the potassium hydroxide price and the amount of potassium hydroxide.

[0195] The net ammonia production profit item determination unit can be used to determine the net ammonia production profit item according to the ammonia sales revenue, the electricity cost, the utility engineering water cost, and the potassium hydroxide cost.

[0196] Optionally, the ammonia production amount may include the current ammonia production amount at the current moment and the previous ammonia production amount at the previous moment of the current moment, and the hydrogen production amount includes the current hydrogen production amount at the current moment and the previous hydrogen production amount at the previous moment.

[0197] The hydrogen production and ammonia production load fluctuation penalty item determination module 430 may include:

[0198] The absolute value calculation sub-module is used to calculate the ammonia absolute value of the ammonia production difference between the current ammonia production amount and the previous ammonia production amount, and the hydrogen absolute value of the hydrogen production difference between the current hydrogen production amount and the previous hydrogen production amount.

[0199] A hydrogen production and ammonia production load fluctuation penalty item determination sub-module, which is used to determine the hydrogen production and ammonia production load fluctuation penalty item according to the absolute value of ammonia production and the absolute value of hydrogen production.

[0200] On this basis, optionally, the hydrogen production and ammonia production load fluctuation penalty item determination sub-module may include:

[0201] A penalty coefficient acquisition unit, which can be used to acquire the ammonia production penalty coefficient and the hydrogen production penalty coefficient;

[0202] An ammonia production load fluctuation penalty item obtaining unit, which can be used to obtain the ammonia production load fluctuation penalty item according to the ammonia production penalty coefficient and the absolute value of ammonia production;

[0203] A hydrogen production load fluctuation penalty item obtaining unit, which can be used to obtain the hydrogen production load fluctuation penalty item according to the hydrogen production penalty coefficient and the absolute value of hydrogen production;

[0204] A hydrogen production and ammonia production load fluctuation penalty item obtaining unit, which can be used to obtain the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production load fluctuation penalty item and the hydrogen production load fluctuation penalty item.

[0205] Optionally, the curtailment penalty item determination module 440 may include:

[0206] A curtailment penalty item determination sub-module, which can be used to obtain the wind-solar power price and determine the curtailment penalty item according to the wind-solar power price and the curtailment power of wind and solar power.

[0207] On this basis, optionally, the curtailment penalty item determination sub-module may include:

[0208] A curtailment penalty item determination unit, which can be used to obtain the curtailment penalty coefficient and determine the curtailment penalty item according to the curtailment penalty coefficient, the wind-solar power price and the curtailment power of wind and solar power.

[0209] Optionally, the target scheduling model further includes an ammonia production net income weight corresponding to the ammonia production net income item, a hydrogen production and ammonia production load fluctuation penalty weight corresponding to the hydrogen production and ammonia production load fluctuation penalty item, and a curtailment penalty weight corresponding to the curtailment penalty item.

[0210] On this basis, optionally, the above-mentioned wind-solar hydrogen production and ammonia synthesis scheduling device may further include:

[0211] A target weight update module, which can be used to respond to a weight adjustment instruction, adjust the target weight for the target weight among the ammonia production net income weight, the hydrogen production and ammonia production load fluctuation penalty weight, and the curtailment penalty weight, and update the target weight according to the adjustment result.

[0212] The dispatching device for hydrogen production from wind and solar power and ammonia synthesis that adapts to wind and solar fluctuations provided by the embodiments of the present invention can, through the cooperation of multiple modules, dispatch the production operation loads of multiple sections to adapt to wind and solar fluctuations, avoid continuous fluctuations in the production curve, and improve the stability and safety of the green ammonia production process.

[0213] The dispatching device for hydrogen production from wind and solar power and ammonia synthesis that adapts to wind and solar fluctuations provided by the embodiments of the present invention can execute the dispatching method for hydrogen production from wind and solar power and ammonia synthesis that adapts to wind and solar fluctuations provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0214] It should be noted that in the embodiments of the above-mentioned dispatching device for hydrogen production from wind and solar power and ammonia synthesis that adapts to wind and solar fluctuations, 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 realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0215] Figure 7 The structural schematic diagram of the electronic device 10 that can be used to implement the embodiments of the present invention is shown. 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 can also represent various forms of mobile devices, such as personal digital processors, 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 only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0216] As Figure 7 shown, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc. Among them, the memory stores a computer program executable by at least one processor. The processor 11 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0217] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0218] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the wind and solar hydrogen production and ammonia synthesis scheduling method that adapts to wind and solar fluctuations.

[0219] In some embodiments, the wind and solar hydrogen production and ammonia synthesis scheduling method that adapts to wind and solar fluctuations can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the wind and solar hydrogen production and ammonia synthesis scheduling method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the wind and solar hydrogen production and ammonia synthesis scheduling method by any other suitable means (e.g., by means of firmware).

[0220] Various embodiments of the systems and technologies 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-a-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments 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 or general programmable processor, and can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0221] A computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partially on the machine, as a stand-alone software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0222] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0223] In order to provide interaction with a user, the systems and techniques described herein can 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 a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, speech input, or tactile input).

[0224] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0225] A computing system can include a client and a server. The client and the server are generally far from each other and typically interact through a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0226] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0227] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for scheduling hydrogen and ammonia synthesis from wind and solar power that adapts to wind and solar fluctuations, characterized in that: include: Obtaining a pre-built target scheduling model, wherein the target scheduling model at least includes a to-be-determined net revenue item for ammonia production, a load fluctuation penalty item for hydrogen and ammonia production, and a power abandonment penalty item; Determine the ammonia production amount of the wind-solar hydrogen-to-ammonia synthesis system and the power consumption and water consumption corresponding to the multiple sections of the wind-solar hydrogen-to-ammonia synthesis system, and determine the net income item of ammonia production according to the ammonia production amount and the power consumption and water consumption; Determine the ammonia production amount and hydrogen production amount of the wind-solar hydrogen production and ammonia synthesis system, and determine the hydrogen production and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount; Determine the amount of abandoned wind and solar power in the wind-solar hydrogen-to-ammonia synthesis system, and determine the abandonment penalty item according to the abandoned wind and solar power; The determined ammonia production net income item, the hydrogen and ammonia production load fluctuation penalty item and the power abandonment penalty item are substituted into the target scheduling model to schedule the production operation loads of the multiple work sections.

2. The method according to claim 1, characterized in that The determining of the net ammonia production income item according to the ammonia production amount and each of the electric energy consumption and each of the water consumption includes: Obtaining the selling price of ammonia, and determining the revenue from selling ammonia according to the ammonia production amount and the selling price of ammonia; Determine the system power consumption of the wind-solar hydrogen-to-ammonia synthesis system according to each of the power consumptions, obtain the wind-solar power price, and determine the electricity cost according to the system power consumption and the wind-solar power price; Determine the cost of water for public works according to each of the water consumptions; The net income item of ammonia production is determined based on the ammonia sales income, the electricity cost and the public utility water cost.

3. The method according to claim 2, characterized in that Each of the water consumptions includes the first portion of the consumption of circulating water in the air separation nitrogen production section, the second portion of the consumption of circulating water in the synthetic ammonia section, and the third portion of the consumption of process water in the electrolytic water hydrogen production section; Determining the water cost of public works according to the water consumption includes: Obtaining a circulating water unit price of the circulating water, and determining a cooling and heat exchange circulating water cost according to the circulating water unit price, the first portion of consumption, and the second portion of consumption; Obtaining a process water unit price of the process water, and determining a process water cost according to the process water unit price and the third part consumption; The utility water cost is determined based on the cooling and heat exchange circulating water cost and the process water cost.

4. The method according to claim 2, characterized in that: The net income item of ammonia production is determined according to the ammonia sales income, the electricity cost and the public works water cost, including: Obtaining the price of potassium hydroxide and the amount of potassium hydroxide consumed in the process of electrolyzing water to produce hydrogen in an alkaline electrolyzer, and determining the cost of potassium hydroxide based on the price of potassium hydroxide and the amount of potassium hydroxide; The net income item of ammonia production is determined based on the ammonia sales income, the electricity cost, the public utility water cost and the potassium hydroxide cost.

5. The method according to claim 1, characterized in that The ammonia production amount includes the current ammonia production amount at the current moment and the previous ammonia production amount at the previous moment before the current moment, and the hydrogen production amount includes the current hydrogen production amount at the current moment and the previous hydrogen production amount at the previous moment; The step of determining the hydrogen and ammonia production load fluctuation penalty item according to the ammonia production amount and the hydrogen production amount includes: Calculating an absolute value of ammonia production of the difference between the current ammonia production amount and the previous ammonia production amount, and an absolute value of hydrogen production of the difference between the current hydrogen production amount and the previous hydrogen production amount; The hydrogen and ammonia production load fluctuation penalty item is determined according to the ammonia production absolute value and the hydrogen production absolute value.

6. The method according to claim 5, characterized in that The step of determining the load fluctuation penalty item for hydrogen and ammonia production according to the ammonia production absolute value and the hydrogen production absolute value comprises: Obtaining ammonia production penalty coefficient and hydrogen production penalty coefficient; According to the ammonia production penalty coefficient and the ammonia production absolute value, an ammonia production load fluctuation penalty item is obtained; According to the hydrogen production penalty coefficient and the hydrogen production absolute value, a hydrogen production load fluctuation penalty term is obtained; The hydrogen and ammonia production load fluctuation penalty item is obtained according to the ammonia production load fluctuation penalty item and the hydrogen production load fluctuation penalty item.

7. The method according to claim 1, characterized in that The determining the power abandonment penalty item according to the abandoned wind and photovoltaic power amount includes: The wind and solar power price is obtained, and the power abandonment penalty item is determined according to the wind and solar power price and the amount of abandoned wind and solar power.

8. The method according to claim 7, characterized in that The determining the power abandonment penalty item according to the wind power and solar power price and the abandoned wind and solar power amount includes: Obtain a power abandonment penalty coefficient, and determine the power abandonment penalty item based on the power abandonment penalty coefficient, the wind power and photovoltaic power price, and the amount of abandoned wind and photovoltaic power.

9. The method according to claim 1, characterized in that: The target scheduling model also includes a net ammonia production profit weight corresponding to the net ammonia production profit item, a hydrogen production and ammonia production load fluctuation penalty weight corresponding to the hydrogen production and ammonia production load fluctuation penalty item, and a power abandonment penalty weight corresponding to the power abandonment penalty item.

10. The method according to claim 9, characterized in that Also includes: In response to the weight adjustment instruction, the target weights among the net ammonia production income weight, the hydrogen and ammonia production load fluctuation penalty weight, and the power abandonment penalty weight are adjusted, and the target weights are updated according to the adjustment results.

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