Hydrogen production planning device and hydrogen production system

Abstract

To provide a hydrogen production planning device for suppressing hydrogen with a high environmental load upon a demand response.SOLUTION: A hydrogen production planning device 17 plans production of multiple types of hydrogen having environmental loads different from each other during generation. The hydrogen production planning device includes a planning part 173 and a plan correction part 174. The planning part creates a production plan of the multiple types of the hydrogen. The plan correction part calculates a profit at a demand response and a cost for reducing the hydrogen with the high environmental loads, so as to correct the production plan on the basis of the calculated profit and cost.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a hydrogen production planning device and a hydrogen production system. [Background technology]

[0002] Hydrogen is attracting attention as an environmentally friendly fuel because it does not emit CO2 when used. There are various methods for producing hydrogen, such as electrolyzing water. A hydrogen production device that uses electrolysis is called a water electrolysis device. Hydrogen produced by a water electrolysis device can be classified according to the type of electricity used as input.

[0003] Renewable energy sources do not emit CO2. For this reason, hydrogen produced from electricity with a low environmental impact is called green hydrogen. Electricity generated from fossil fuels has a high environmental impact. For this reason, hydrogen produced from electricity with a high environmental impact is called gray hydrogen. Green hydrogen has a lower environmental impact than gray hydrogen, and is therefore of high environmental value to businesses that aim to achieve carbon neutrality. Hydrogen production equipment not only produces hydrogen, but can also provide adjustment power to the grid through demand response.

[0004] Patent Document 1 describes an apparatus that generates an operation plan for generating multiple types of hydrogen with different environmental loads using a hydrogen generation apparatus based on the predicted hydrogen demand for each of the multiple types of hydrogen.

[0005] Patent Document 2 describes a planning device that generates a predicted demand response received from an electric power company during a target period using a demand response prediction model, and generates an operation plan based on the predicted demand response. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7221376 [Patent Document 2] Patent No. 7219805 Summary of the Invention [Problem to be solved by the invention]

[0007] Patent Document 1 describes a system for planning green or gray hydrogen, while Patent Document 2 describes a system for responding to demand using a hydrogen production device. When demand response is implemented using a hydrogen production device such as a water electrolysis device, electricity may be received from the grid. Unless the electricity received from the grid has an energy origin certificate or similar, it is likely to contain fossil fuels, and therefore is considered gray hydrogen rather than green hydrogen. If gray hydrogen accumulates in a hydrogen storage facility, the amount of green hydrogen that can be produced may be limited.

[0008] The present invention has been made in view of the above problems, and an object of the present invention is to provide a technology for suppressing hydrogen, which has a high environmental load, during demand response. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides a hydrogen production planning device that plans the production of multiple types of hydrogen that have different environmental impacts when generated, and includes a planning unit that creates a production plan for the multiple types of hydrogen, and a plan correction unit that calculates revenue at the time of demand response and the reduction cost of hydrogen that has a higher environmental impact among the multiple types of hydrogen, and corrects the production plan based on the calculated revenue and reduction cost. [Effects of the Invention]

[0010] According to the present invention, hydrogen, which has a high environmental load, is suppressed during demand response. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a functional block diagram of a hydrogen production system according to a first embodiment. [Figure 2] FIG. 1 is a functional block diagram of a hydrogen production planning device according to a first embodiment. [Figure 3] 4 is a flowchart showing a plan correction process according to the first embodiment. [Figure 4] FIG. 2 is a diagram for explaining an operation plan of the hydrogen power generation apparatus according to the first embodiment. [Figure 5] FIG. 2 is a diagram illustrating the relationship between the amount of hydrogen produced and the amount of power consumed according to the first embodiment. [Figure 6] FIG. 2 is a diagram for explaining an operation plan for the hydrogen storage device according to the first embodiment. [Figure 7] FIG. 2 is a diagram illustrating the relationship between the amount of grey hydrogen that can be reduced and costs according to the first embodiment. [Figure 8] 10 is a flowchart showing a plan correction process according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, specific examples of a hydrogen production planning device and a hydrogen production system according to embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the examples, but is defined by the claims. [Example]

[0013] FIG. 1 is a functional block diagram of the configuration of a hydrogen production system.

[0014] The hydrogen production system 10 includes a power generation device 11, a hydrogen production device 12, a hydrogen storage device 13, a hydrogen power generation device 14, a hydrogen transport device 15, a power storage device 16, and a hydrogen production planning device 17. The hydrogen production system 10 communicates with an energy certification device 20 and an electric power company 30 via a communication network 50. Furthermore, the hydrogen production system 10 interchanges electric power with the electric power company 30 via a power network 60. Furthermore, the hydrogen production system 10 interchanges hydrogen with hydrogen consumers 40 via a hydrogen network 70.

[0015] The power generation device 11 is a device that generates electricity from a power source such as renewable energy (hereinafter also referred to as "renewable energy"). The power generation device 11 may generate electricity not only from renewable energy but also from a cogeneration system (cogeneration) or fossil fuels. The power generation device 11 can purchase a renewable energy certificate (hereinafter also referred to as "renewable energy certificate") that certifies the energy origin and CO2 emissions of the generated electricity from the energy certification device 20 via the communication network 50.

[0016] The hydrogen production device 12 is a device that produces hydrogen using electric power received from the power generation device 11, the electric power company 30, the power storage device 16, or the hydrogen power generation device 14. The hydrogen production device 12 transports the produced hydrogen to the hydrogen storage device 13 via the hydrogen network 70.

[0017] The hydrogen storage device 13 stores the hydrogen produced by the hydrogen production device 12. The hydrogen storage device 13 transports the stored hydrogen to the hydrogen power generation device 14 and the hydrogen transport device 15 via the hydrogen network 70.

[0018] The hydrogen power generation apparatus 14 is an apparatus that receives hydrogen stored in the hydrogen storage apparatus 13 via the hydrogen network 70 and generates electricity from the received hydrogen. The hydrogen power generation apparatus 14 supplies the generated electricity to the power company 30 via the power network 60. Furthermore, the hydrogen power generation apparatus 14 may supply the generated electricity to the power storage apparatus 16 or the hydrogen production apparatus 12 via the power network 60.

[0019] The hydrogen transport device 15 receives hydrogen from the hydrogen storage device 13 via the hydrogen network 70 and transports the received hydrogen to the hydrogen consumer 40 via the hydrogen network 70. Furthermore, the hydrogen transport device 15 may receive hydrogen from the hydrogen supplier 41 via the hydrogen network 70 and transport the received hydrogen to the hydrogen storage device 13.

[0020] The power storage device 16 receives power from the power generation device 11, the hydrogen power generation device 14, or the power company 30 via the power network 60, and stores the received power. The power storage device 16 supplies the stored power to the hydrogen production device 12 and the power company 30 via the power network 60.

[0021] The hydrogen production planning device 17 is a device that plans and controls the operation of each device (equipment) 11-16 of the hydrogen production system 10. The hydrogen production planning device 17 is connected via communication to the power generation device 11, the hydrogen production device 12, the hydrogen storage device 13, the hydrogen power generation device 14, the hydrogen transport device 15, and the power storage device 16, and transmits plans and control commands to each device 11-16.

[0022] The energy certification device 20 communicates with the power generation device 11 and the power company 30 via a communication network 50. The energy certification device 20 issues a renewable energy certificate that certifies the energy origin and CO2 emissions of the power generation device 11.

[0023] The electric power company 30 is a company that supplies electric power to the electric power demand. Furthermore, the electric power company 30 may instruct the hydrogen production system 10 to perform a demand response.

[0024] The hydrogen consumer 40 may be a business that purchases hydrogen and generates hydrogen power, or may be a business that collects and sells hydrogen. The hydrogen supplier 41 is a business that sells and supplies hydrogen.

[0025] FIG. 2 is a functional block diagram of the hydrogen production planning device according to the first embodiment.

[0026] The hydrogen production planning device 17 includes an acquisition unit 171 , a prediction unit 172 , a planning unit 173 , a plan correction unit 174 , a control unit 175 , and an output unit 176 .

[0027] The acquisition unit 171 acquires and stores various information including weather information, demand response information, facility information, hydrogen demand information, power demand information, and transportation information. Here, the demand response information may include a demand response command and a demand response incentive unit price. The facility information may include the amount of hydrogen produced by the hydrogen production device 12 and the amount of power consumed by each of the devices 11-16. The hydrogen demand information may include hydrogen demand information categorized by the amount of CO2 emissions during production, such as multiple types of hydrogen that have different environmental impacts when produced, i.e., hydrogen with a high environmental impact (also called green hydrogen) and hydrogen with a low environmental impact (also called gray hydrogen).

[0028] The prediction unit 172 predicts the amount of renewable energy power generation, the amount of hydrogen demand, the power demand, and the demand response from the information acquired and stored by the acquisition unit 171. The prediction by the prediction unit 172 may use a statistical method such as machine learning.

[0029] The planning unit 173 creates an operation plan as an example of a "production plan" for each of the devices 11-16 in the hydrogen production system 10 based on the acquired information acquired by the acquisition unit 171 and the predicted information predicted by the prediction unit 172. The operation plan may be planned using mathematical programming or a machine learning method such as a neural network. The planning unit 173 may set cost minimization or profit maximization as an evaluation index, or may set CO2 emission minimization or an index evaluating CO2 emission minimization, cost minimization, and profit maximization using a linear weighted sum method. The operation plan must satisfy the physical and operational constraints of each of the devices 11-16 and is planned so as not to exceed the maximum output value of each device 11-16. Furthermore, the operation plan may be set to a value lower than the maximum operational output value.

[0030] When a demand response command included in the demand response information is acquired, the plan correction unit 174 corrects the operation plan generated by the planning unit 173. When a demand response command is not acquired, the plan correction unit 174 continues the operation plan generated by the planning unit 173. Furthermore, when a demand response command is acquired within the planned time, the plan correction unit 174 executes a process of correcting the operation plan.

[0031] The control unit 175 converts the operation plan determined by the plan correction unit 174 into control command values ​​for the devices 11 to 16 and performs control.

[0032] The output unit 176 outputs the creation results of the plan unit 173 and the correction results of the plan correction unit 174 to the user. The output contents of the output unit 176 may be the operation plans of each of the devices 11 to 16 and the renewable energy certificate purchase plan at the time of purchasing a renewable energy certificate. Furthermore, the output unit 176 may output, as data, whether or not demand response is implemented by the plan correction unit 174, and the amount of hydrogen, which has a high environmental load, that can be reduced and the reduction cost using various methods described below. The output unit 176 may display the output contents on a screen. Furthermore, the output unit 176 may output performance data such as the control status by the control unit 175 as data or display it on a screen.

[0033] FIG. 3 is a flowchart showing the plan correction process according to the first embodiment.

[0034] The plan correction unit 174 executes a plan correction process to correct the operation plan created by the planning unit 173.

[0035] When the plan adjustment process starts, the plan adjustment unit 174 acquires the demand response information (DR information) stored in the acquisition unit 171 (S301). The demand response information includes a demand response time and an incentive based on a demand response command.

[0036] The plan adjustment unit 174 determines whether the demand response command is an unplanned command (S302). If the determination result of S302 is false (S302: NO), the plan adjustment unit 174 ends the plan adjustment process (S310).

[0037] If the determination result of S302 is true (S302: YES), the plan modification unit 174 determines whether the demand response command is an increase command or a decrease command (S303). If the demand response command is an increase command, the plan modification unit 174 proceeds to S304, and if it is a decrease command, the plan modification unit 174 proceeds to S311.

[0038] If the demand response command is a reduction command, the plan correction unit 174 calculates the amount of power consumption that can be reduced by the hydrogen production system 10 during the demand response and the profit that will be achieved if the reduction command is executed by the amount of reduction (S311). Methods for calculating the amount of power consumption that can be reduced include, for example, discharging the power stored in the power storage device 16, reducing the amount of hydrogen production by the hydrogen production device 12 below the planned value, or increasing the amount of power generated by the hydrogen power generation device 14 above the planned value. The plan correction unit 174 calculates the percentage of the output of each device 11-16 that can be changed from the operation plan based on the upper or lower limit values ​​in terms of physical and operational aspects, such as those used by the planning unit 173, and estimates the amount of power reduction that can be achieved based on the calculation results. Furthermore, the plan correction unit 174 may simultaneously calculate the cost that would be incurred if at least one of the devices 11-16 responded to the reduction command by the amount of reduction. Next, for example, with reference to FIG. 4, a specific example of increasing the amount of power generated by the hydrogen power generation device 14 above the planned value will be described.

[0039] FIG. 4 is a diagram illustrating an operation plan for the hydrogen power generation apparatus according to the first embodiment.

[0040] 4, the horizontal axis represents time, the vertical axis represents the output of the hydrogen power generation system 14, reference numeral 402 represents the planned output of the hydrogen power generation system 14, reference numeral 400 represents the upper output limit of the hydrogen power generation system 14, and reference numeral 401 represents the variable output capacity of the hydrogen power generation system 14. By using the variable output capacity 401, the hydrogen production system 10 can reduce the overall net power consumption of the hydrogen production system 10. This enables the hydrogen production system 10 to respond to demand.

[0041] Furthermore, the operation plan of the hydrogen production device 12 may be linked to the hydrogen storage device 13 and the hydrogen power generation device 14. For this reason, the plan correction unit 174 may estimate the possible cost reduction amount based on the physical constraints of each of the individual devices 13, 14, as well as on the constraints of the entire system that are set based on the interrelationships between the devices 13, 14. For example, the plan correction unit 174 may calculate the constraints of the entire system consisting of the hydrogen production device 12 and the hydrogen storage device 13 for the hydrogen production device 12 based on the relationship with the hydrogen storage device 13. This constraint may be set by estimating the possible cost reduction amounts of the hydrogen production device 12 and the hydrogen storage device 13, and the device with the smallest possible cost reduction amount may be set as the physical and operational constraint of the entire system. The plan correction unit 174 calculates the possible cost reduction amount according to each of the above-mentioned methods, and accumulates the possible cost reduction amounts starting from the one with the smallest cost, setting the requested amount of the demand response command as the upper limit, and then finishing the accumulation. The plan adjustment unit 174 calculates the profit as the product of the demand response incentive unit price included in the demand response information and the accumulated possible amount.

[0042] Returning to FIG. 3, the plan modification unit 174 determines whether or not to implement demand response based on the result calculated in S311 (S308). The plan modification unit 174 may determine whether or not to implement demand response by comparing profits and costs. If the profits from a downward demand response are higher than the costs, the plan modification unit 174 implements demand response.

[0043] On the other hand, if the demand response command is an increase command, the plan correction unit 174 basically performs the same processing as in S311. Specifically, when calculating the possible reduction amount, the plan correction unit 174 reduced the power consumption of the entire hydrogen production system 10 by lowering the planned value of the hydrogen production amount. However, when calculating the possible increase amount, the plan correction unit 174 needs to increase the power consumption of the entire hydrogen production system 10 by conversely increasing the planned value of the hydrogen production amount. Therefore, the plan correction unit 174 may charge the power storage device 16 with power greater than the planned value in order to increase the power consumption of the entire hydrogen production system 10. The plan correction unit 174 may increase the hydrogen production amount of the hydrogen production device 12 above the planned value or decrease the power generation amount of the hydrogen power generation device 14 below the planned value. As in S311, the plan correction unit 174 calculates the percentage by which the output of each of the devices 11-16 can be changed from the operation plan based on the upper or lower limit values ​​in terms of physical and operational aspects such as those used by the planner 103, and estimates the possible increase amount based on the calculation result. Furthermore, the plan correction unit 174 simultaneously calculates the cost when at least one of the devices 11-16 responds to an increase command by the possible increase amount. The plan correction unit 174 calculates the possible increase amount according to each method, and accumulates the requested amount of demand response information from the portion with the smallest cost as the upper limit.

[0044] The plan correction unit 174 calculates the production volume of environmentally hazardous hydrogen generated during the upward demand response (S305). In the case of upward demand response, power is absorbed from the grid, making the energy source unclear. Therefore, hydrogen generated from grid power cannot be treated as green hydrogen and becomes environmentally hazardous hydrogen, such as gray hydrogen. If gray hydrogen is stored in the hydrogen storage device 13 during upward demand response, restrictions may be placed on the production of green hydrogen from renewable energy after the time of the demand response. For this reason, upward demand response must be performed after estimating the amount of gray hydrogen generated and the amount that can be reduced in subsequent processing. In S305, the plan correction unit 174 first calculates the amount of environmentally hazardous hydrogen, such as gray hydrogen, generated during the demand response. To determine the amount of environmentally hazardous hydrogen generated from the amount of power that can be increased by the hydrogen production system 10 calculated in S304, the plan correction unit 174 excludes the amount of power that can be increased by the power storage device 16 and extracts only the amount that can be increased by the hydrogen production device 12. The plan correction unit 174 calculates the amount of hydrogen produced using data on the relationship between the amount of hydrogen produced and the amount of power consumed, as shown in FIG.

[0045] FIG. 5 is a diagram illustrating the relationship between the amount of hydrogen produced and the amount of power consumed according to the first embodiment.

[0046] 5, when the power consumption of each of the devices 11 to 16 is 25 kWh, the amount of hydrogen produced by the hydrogen production device 12 is 5 Nm3. Therefore, when the amount that can be increased by the hydrogen production device 12 is 25 kWh, the amount of hydrogen produced is 5 Nm3. The plan correction unit 174 calculates the profit when responding to an increased demand response by multiplying 25 kWh by the demand response incentive unit price.

[0047] Returning to FIG. 3 again, the plan correction unit 174 determines whether the amount of environmentally-impactful hydrogen generated by demand response is equal to or greater than a storage reference value, which is an example of a "reference value" (S306). Here, the storage reference value is calculated based on the operation plan of the hydrogen storage device 13. The plan correction unit 174 can calculate the storage reference value based on the difference between the upper limit value of the hydrogen storage device 13 during the demand response command period and the highest value in the operation plan of the hydrogen storage device 13. Here, the upper limit value of the hydrogen storage device 13 may be a physical upper limit value or a value preset by the user. If the determination result of S306 is true (S306: YES), the plan correction unit 174 calculates the amount of hydrogen produced up to the reference value, calculates the amount of electricity required for hydrogen production as in S305, and may recalculate the profit when responding to demand response by multiplying the calculated amount of electricity by the demand response incentive unit price. If the determination result of S306 is finally true (S306: YES), the plan modifying unit 174 proceeds to S307, and if the determination result of S306 is false (S306: NO), the plan modifying unit 174 proceeds to S309.

[0048] The plan adjustment unit 174 calculates the amount of hydrogen production that has a high environmental load calculated in S305 and that can be reduced at a later time (S307). First, at this time, the plan adjustment unit 174 needs to set the period over which the reduction will be performed.

[0049] FIG. 6 is a diagram illustrating an operation plan for the hydrogen storage device according to the first embodiment.

[0050] From time tn to time t0, when hydrogen with a high environmental load is produced using the increaseable amount calculated in S305, if there is no increaseable amount, the remaining storage amount is 600. However, the remaining storage amount increases to 602 due to the increaseable amount. The difference between the remaining storage amounts 602 and 600 is the amount of hydrogen produced with a high environmental load due to the increaseable amount. If time t0 is the end time of the increaseable amount, the remaining storage amount 601 from time t0 when there is no increaseable amount becomes 603 due to the increaseable amount. Since the remaining storage amount reaches its upper limit at time tk, hydrogen should continue to be produced even after time tk. However, since hydrogen will no longer be able to be stored, it is necessary to reduce the amount of hydrogen produced by increase demand response before it reaches the upper limit of the hydrogen storage device 13. The period from time t0 to time tk may be set as the period for reducing the amount of hydrogen produced by increase demand response.

[0051] Calculate the amount of reduction that can be achieved within the reduction period. There are several ways to reduce hydrogen, which has a high environmental impact, as follows:

[0052] The first method is a hydrogen reduction method using the hydrogen power generation system 14. This method reduces the amount of hydrogen that has a high environmental load by generating electricity using hydrogen, which has a high environmental load, using the hydrogen power generation system 14. For example, as shown in FIG. 4, when the possible output variable amount 401 is to be newly increased during the period from time t0 to time tk, the plan correction unit 174 can calculate the amount of hydrogen that has a high environmental load from this possible output variable amount 401. At that time, the plan correction unit 174 calculates not only the cost but also the profit from selling electricity if electricity is to be sold to increase the power output.

[0053] The second method is a hydrogen reduction method using the hydrogen power generation device 14 in accordance with a downward demand response. If the demand response information contains a downward demand response command between time t0 and time tk, the plan correction unit 174 calculates the cost and profit to implement the hydrogen reduction using the hydrogen power generation device 14 according to the first method.

[0054] The third method is a hydrogen reduction method using the hydrogen transportation device 15. This method can be used when the hydrogen transportation device 15 can change the transportation time of gray hydrogen and can transport hydrogen with a high environmental impact. The plan correction unit 174 determines whether there is a section in the equipment information of the hydrogen transportation device 15 stored in the acquisition unit 171 that overlaps with the period from time t0 to time tk during which hydrogen transportation is possible. If there is an overlapping time period and the amount of hydrogen with a high environmental impact that can be transported is available, the plan correction unit 174 sets the amount of hydrogen with a high environmental impact that can be transported as the upper limit and calculates the amount of hydrogen production that can be reduced by increasing demand response. The plan correction unit 174 calculates the cost based on the transportation unit price and other factors in the equipment information of the hydrogen transportation device 15.

[0055] The fourth method is to change the type of hydrogen by purchasing renewable energy certificates. This method involves purchasing renewable energy certificates and linking environmental value to hydrogen using the purchased renewable energy certificates, thereby changing from hydrogen with a high environmental impact to hydrogen with a low environmental impact. The plan correction unit 174 calculates the amount of hydrogen production that can be reduced through upward demand response and the cost thereof, based on the number of certificates that can be purchased on the certificate market and the unit price of the certificates.

[0056] The applicability of the above first to fourth methods varies from site to site depending on the equipment configuration and constraints of the hydrogen production system 10. Therefore, it is sufficient to select a method based on conditions such as the presence or absence of equipment according to the site situation, and perform calculations using the selected method. The calculation results are shown in table 700 as shown in Figure 7.

[0057] FIG. 7 is a diagram illustrating the relationship between the amount of grey hydrogen that can be reduced and costs according to the first embodiment.

[0058] Table 700 stores the following as item values ​​(column values): method, potential reduction amount, cost, and revenue. The method is the method for reducing gray hydrogen. The potential reduction amount is the amount of gray hydrogen that can be reduced during an upward demand response. The cost is the cost of reducing gray hydrogen during an upward demand response. The revenue is the revenue from reducing gray hydrogen during an upward demand response.

[0059] Returning to FIG. 3 again, the plan correction unit 174 compares the results of S307 and S305 and determines whether to implement demand response (S308). The plan correction unit 174 adds up the reducible amount and cost, starting with the lowest cost, with the hydrogen production volume that has the highest environmental impact when implementing demand response as the upper limit. The plan correction unit 174 adds up the reducible amount and cost until the reducible amount reaches the upper limit or the cost exceeds the profit, and selects a method for dealing with the reducible amount. If the reducible amount cannot be used in full with a certain method, the plan correction unit 174 divides it. Here, a margin may be set, such as a certain amount or more of the difference between cost and profit. If there is a method to select, the plan correction unit 174 proceeds to S309; ​​if not, it terminates the plan correction process (S310).

[0060] The plan correction unit 174 corrects the original plan according to the method determined in S307 (S309). For example, in the case of FIG. 4, if the possible output variable amount 401 is determined as the reducible amount in S307, the plan correction unit 174 sets the corrected plan to be the sum of the possible output variable amount 401 and the planned output amount 402. If hydrogen reduction by the hydrogen transportation device 15 is selected in S307, the plan correction unit 174 changes the transportation plan for the hydrogen transportation device 15. If changing the type of hydrogen by purchasing a renewable energy certificate is selected, the plan correction unit 174 changes the renewable energy certificate purchase plan. Finally, the plan correction unit 174 ends the plan correction process (S310).

[0061] According to this configuration, the hydrogen production planning device 17 plans the production of multiple types of hydrogen that have different environmental impacts when generated. The hydrogen production planning device 17 includes a planning unit 173 and a plan correction unit 174. The planning unit 173 creates production plans for multiple types of hydrogen. The plan correction unit 174 calculates the profit at the time of demand response and the cost of reducing hydrogen that has a high environmental impact, and corrects the production plan based on the calculated profit and cost.

[0062] This makes it possible to suppress the use of hydrogen, which has a high environmental impact, during demand response.

[0063] The system includes an acquisition unit 171 that acquires demand response information including demand response commands, and a plan correction unit 174 that corrects the production plan based on revenue and cost when the command is a reduction command. This makes it possible to respond to the reduction demand response and reduce hydrogen, which has a high environmental load.

[0064] The system is provided with an acquisition unit 171 that acquires demand response information including demand response commands, and a plan correction unit 174 corrects the production plan based on revenue and cost when the command is an increase command and the amount of hydrogen with a high environmental load is equal to or greater than the storage reference value, thereby enabling the hydrogen with a high environmental load to respond to an increase in demand response within the storage reference value range.

[0065] The hydrogen production system 10 includes a hydrogen production planning device 17 and a hydrogen power generation device 14 that generates electricity from multiple types of hydrogen. A plan correction unit 174 corrects the production plan by changing the output of the hydrogen power generation device 14. This makes it possible to correct the production plan within the range of the output of the hydrogen power generation device 14.

[0066] The hydrogen transport device 15 transports multiple types of hydrogen, and the plan correction unit 174 corrects the production plan by changing the transport time of the hydrogen transport device 15. This allows the production plan to be corrected within the transport capacity of the hydrogen transport device 15.

[0067] The plan modification unit 174 purchases a renewable energy certificate and modifies the production plan, thereby enabling demand response to be handled without being restricted by the devices 11 to 16. [Example]

[0068] The following describes an example in which a part of the plan adjustment process (see FIG. 3) by the plan adjustment unit 104 shown in Example 1 is modified. The plan adjustment unit 104 can also process the plan adjustment process in FIG. 3 as an optimization problem.

[0069] FIG. 8 is a flowchart showing the plan correction process according to the second embodiment.

[0070] For the processes in the plan modification process according to Embodiment 2 that overlap with the plan modification process according to Embodiment 1, the description will be omitted. For example, the plan modification unit 104 can set profit maximization or the like as the objective function in S801 or S802, and include the process of FIG. 3 as a constraint condition. For example, in the up-demand response implementation optimization of S801, the plan modification unit 104 sets the up-demand response implementation amount x_up of the hydrogen power generation device 14 and variables, and sets the output variable amount 301 of FIG. 4 as the range of x_up. When the efficiency [kW / Nm3] of the fuel cell is α, the plan modification unit 104 calculates the hydrogen production amount with a high environmental load as x_up×(1 / α).

[0071] The plan modification unit 104 calculates the integrated value of the hydrogen production amount with a high environmental load from time t-n to time t0, and calculates the hydrogen reduction possible amount with a high environmental load by each method in S307 from time t0 to time tk. The plan modification unit 104 may set, as a new constraint formula, (the integrated value of the hydrogen production amount with a high environmental load from time t-n to time t0)-(the hydrogen reduction possible amount with a high environmental load by each method in S307)<H2th. Here, H2th may be the reference value set in S306. In S803, the plan modification unit 104 may perform a determination process by setting criteria such as S801 or S802 being below a certain cost or the profit being 0 or more.

[0072] Note that the present invention is not limited to the above-described embodiments, and includes various modification examples. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Also, for a part of the configuration of each embodiment, addition, deletion, or replacement with other configurations is possible.

Description of Reference Numerals

[0073] 10... Hydrogen production system, 14... Hydrogen power generation device, 15... Hydrogen transportation device, 17... Hydrogen production planning device, 101... Acquisition unit, 103... Planning unit, 104... Plan correction unit

Claims

1. A hydrogen production planning device that plans the production of multiple types of hydrogen that have different environmental loads when produced, a planning unit that creates a production plan for the plurality of types of hydrogen; a plan correction unit that calculates the profit at the time of demand response and the cost of reducing hydrogen that has a high environmental impact from among the multiple types of hydrogen, and corrects the production plan based on the calculated profit and cost.

2. an acquisition unit that acquires demand response information including the demand response command; the plan correction unit corrects the manufacturing plan based on the profit and the cost when the command is a reduction command; The hydrogen production planning device according to claim 1 .

3. an acquisition unit that acquires demand response information including the demand response command; the plan correction unit corrects the production plan based on the profit and the cost when the command is an increase command and the amount of hydrogen with a high environmental load is equal to or greater than a reference value. The hydrogen production planning device according to claim 1 .

4. A hydrogen production system comprising the hydrogen production planning device of claim 1 and a hydrogen power generation device that generates electricity from the plurality of types of hydrogen, The plan correction unit corrects the production plan by changing the output of the hydrogen power generation device.

5. the plan correction unit corrects the production plan when the demand response is a decrease command. The hydrogen production system according to claim 4 .

6. a hydrogen transport device that transports the plurality of types of hydrogen; the plan correction unit corrects the production plan by changing a transportation time of the hydrogen transportation device. The hydrogen production system according to claim 4 .

7. the plan correction unit purchases renewable energy certificates and corrects the manufacturing plan; The hydrogen production system according to claim 4 .

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