WO2022269794A1 - プラント制御方法、プラント制御装置、プログラム、およびプラント - Google Patents
プラント制御方法、プラント制御装置、プログラム、およびプラント Download PDFInfo
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- WO2022269794A1 WO2022269794A1 PCT/JP2021/023761 JP2021023761W WO2022269794A1 WO 2022269794 A1 WO2022269794 A1 WO 2022269794A1 JP 2021023761 W JP2021023761 W JP 2021023761W WO 2022269794 A1 WO2022269794 A1 WO 2022269794A1
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- 238000000034 method Methods 0.000 title claims description 87
- 238000004519 manufacturing process Methods 0.000 claims abstract description 208
- 238000010248 power generation Methods 0.000 claims abstract description 120
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 242
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- G06Q10/00—Administration; Management
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q30/0283—Price estimation or determination
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- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
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- G06Q50/06—Energy or water supply
Definitions
- the present invention relates to a plant control method, a plant control device, a program, and a plant.
- variable renewable energy It is expected that the use of variable renewable energy will continue to expand in the future. As one form of utilization of variable renewable energy, it is conceivable to use variable renewable energy to produce hydrogen, store the produced hydrogen at least temporarily, and use the hydrogen in subsequent processes. .
- Patent Document 1 the invention described in Patent Document 1 is based on the motivation to purchase and store power when the price is low and to sell it when the price is high in the power trading market where the price of power fluctuates over time.
- a purchase decision-making device receives power prices in the power trading market and purchases power according to a predetermined algorithm.
- the purchased power is stored in the power storage device.
- a sales decision making device receives the electricity price in the electricity trading market and sells the electricity according to a predetermined algorithm.
- Patent Document 1 simply buys and sells electricity traded on the electricity market. In other words, the technology described in Patent Literature 1 does not particularly focus on utilization of variable renewable energy.
- variable renewable energy hydrogen, for example
- substances manufactured using variable renewable energy can be used as materials for manufacturing other substances through chemical processes, or can be used to generate electrical energy through power generation processes.
- once manufactured matter can be converted into various forms of matter or energy. In such cases, it would be highly desirable to be able to change the economic value of the material once produced to a greater one under given conditions.
- the present application has been made in consideration of the above circumstances, and aims to automatically control the economic value of substances manufactured using variable renewable energy so as to increase them. It is intended to provide a plant control method, a plant control device, a program, and a plant that can
- the plant control method is a method for controlling a plant that includes a storage device, a second manufacturing device, and at least one of a power generation device and a sales means to be supplied.
- the storage device is a first manufacturing device manufactured by a first manufacturing device that manufactures a first product using power supplied from a power supply device that supplies power generated using variable renewable energy Receive and store items.
- the second manufacturing device manufactures a second product using the first product supplied from the storage device.
- the power generation device generates power using the first product supplied from the storage device.
- the means for sale is a means for supplying the first product supplied from the storage device to the outside for sale.
- the calculation unit calculates a first price, which is a unit selling price of the first product, a second price, which is a unit selling price of the second product, and a third price, which is a unit selling price of the electric power generated by the power generator. Get at least one of them. a second supply that is a supply amount of the first product to the second manufacturing apparatus based on at least one of the acquired first price, second price, and third price; Determine quantity.
- the calculation unit determines the sales means to the sales means based on at least one of the acquired first price, the second price, and the third price.
- a first feed rate is determined, which is the feed rate of the first product.
- the calculation unit calculates the first price to the power generation device based on at least one of the acquired first price, second price, and third price.
- a third feed rate is determined, which is the feed rate of the product. (1) the first product is supplied to the second manufacturing unit at the determined second supply rate; and (2) the determined first supply rate if the plant includes the means for sale. and (3) if the plant includes the power generation equipment, the first product is supplied to the power generation equipment at the third supply amount determined.
- the control signal output section outputs the control signal as follows.
- a plant control method is the plant control method described above, wherein the calculation unit first determines the second supply amount, and then, when the plant includes the means for sale, , the computing unit determines to supply the first product to the means for sale, determines the first supply amount to be a value greater than 0, and if the plant includes the power generation device , the computing unit determines to supply the first product to the power generation device, and determines the third supply amount to be a value greater than zero.
- a plant control method is the above plant control method, wherein the plant includes the means for sale and the power generator.
- the computing unit first determines the second supply amount, and then based on at least one of the first price and the third price Then, it is determined whether the third supply amount is made larger than the first supply amount or the first supply amount is made larger than the third supply amount.
- the computing unit sets the first supply amount to zero when the third supply amount is made larger than the first supply amount, or The third supply amount is set to zero when the first supply amount is made larger than the third supply amount.
- the calculation unit when the second price is equal to or higher than a predetermined reference value, distributes the second supply amount to the supply target facility.
- the supply amount is made larger than the supply amount of the first product.
- the computing unit when the second price is equal to or higher than a predetermined reference value, the computing unit supplies the first product to the supply target equipment It is a thing that sets the supply amount to zero.
- the calculation unit Under the constraint condition, the second supply amount and the supply target based on a predetermined evaluation function value determined by at least two of the first supply amount, the second supply amount, and the third supply amount and determining the supply amount of the first product to the facility.
- the means for sale includes a tank for storing the first product, piping to another plant that is a sale destination, and transportation means. and piping for loading.
- the plant control method described above has the following features.
- the plant further includes a power distribution device that distributes the power supplied from the power supply device to the first manufacturing device and a power sales facility for selling the power.
- the calculation unit acquires a fourth price, which is a selling price of the power supplied from the power supply device.
- the calculation unit calculates the amount of electric power supplied to the electric power sales facility based on at least one of the first price, the second price, the third price, and the fourth price that has been obtained. Determine power supply.
- the control signal output unit outputs a control signal so that power is supplied from the power distribution device to the power sales facility at the determined power supply amount for sale.
- the plant control method described above has the following features.
- the plant further comprises a nitrogen production device for producing nitrogen, and means for selling nitrogen, which is means for supplying the nitrogen produced by the nitrogen production device to the outside for sale.
- the first product is hydrogen.
- the second product is ammonia.
- the second production apparatus produces ammonia, which is the second product, using hydrogen, which is the first product, and nitrogen supplied from the nitrogen production apparatus.
- the calculation unit acquires a nitrogen selling price, which is the selling price of nitrogen.
- the calculation unit determines a sales nitrogen supply amount, which is the supply amount of nitrogen to the nitrogen sales means, based on at least the nitrogen sales price.
- the control signal output unit outputs a control signal so that nitrogen is supplied from the nitrogen production device to the means for selling nitrogen at the determined nitrogen supply amount for sale.
- One aspect of the present invention is a plant control device for controlling a plant.
- the plant includes a storage device, a second manufacturing device, and equipment to be supplied with at least one of a power generation device and means for sale.
- the storage device is a first manufacturing device manufactured by a first manufacturing device that manufactures a first product using power supplied from a power supply device that supplies power generated using variable renewable energy Receive and store items.
- the second manufacturing device manufactures a second product using the first product supplied from the storage device.
- the power generation device generates power using the first product supplied from the storage device.
- the means for sale is a means for supplying the first product supplied from the storage device to the outside for sale.
- the plant control device includes an arithmetic unit and a control signal output unit.
- the computing unit has a first price that is a unit selling price of the first product, a second price that is a unit selling price of the second product, and a third price that is a unit selling price of the electric power generated by the power generator.
- the calculation unit determines the sales means to the sales means based on at least one of the acquired first price, the second price, and the third price.
- a first feed rate is determined, which is the feed rate of the first product.
- the calculation unit calculates the first price to the power generation device based on at least one of the acquired first price, second price, and third price.
- a third feed rate is determined, which is the feed rate of the product. (1) the first product is supplied to the second manufacturing unit at the determined second supply rate; and (2) the determined first supply rate if the plant includes the means for sale. and (3) if the plant includes the power generation equipment, the first product is supplied to the power generation equipment at the third supply amount determined.
- the control signal output unit outputs a control signal.
- One aspect of the present invention is a program for causing a computer to function as the plant control device of [12] above.
- a plant includes a storage device, a second manufacturing device, equipment to be supplied with at least one of a power generation device and means for sale, and a plant control device.
- the storage device is a first manufacturing device manufactured by a first manufacturing device that manufactures a first product using power supplied from a power supply device that supplies power generated using variable renewable energy Receive and store items.
- the second manufacturing device manufactures a second product using the first product supplied from the storage device.
- the power generation device generates power using the first product supplied from the storage device.
- the means for sale is a means for supplying the first product supplied from the storage device to the outside for sale.
- the plant control device includes a calculation section and a control signal output section.
- the computing unit comprises a first unit price that is a unit selling price of the first product, a second price that is a unit selling price of the second product, and a third price that is a unit selling price of the electric power generated by the power generator.
- the calculation unit determines the sales means to the sales means based on at least one of the acquired first price, the second price, and the third price.
- a first feed rate is determined, which is the feed rate of the first product.
- the calculation unit calculates the first price to the power generation device based on at least one of the acquired first price, second price, and third price.
- a third feed rate is determined, which is the feed rate of the product. (1) the first product is supplied to the second manufacturing unit at the determined second supply rate; and (2) the determined first supply rate if the plant includes the means for sale. and (3) if the plant includes the power generation equipment, the first product is supplied to the power generation equipment at the third supply amount determined.
- the control signal output unit outputs a control signal.
- the supply amount of the first product for each supply destination from the storage device can be determined according to the prices of the first product, the second product, and the power. In other words, control can be performed so that the profit of the plant is increased in response to price fluctuations and the like.
- FIG. 2 is a block diagram showing a schematic functional configuration inside the plant control device in the first embodiment
- FIG. 3 is a schematic diagram showing the relationship between terms that are units of control and data for each term in the first embodiment
- 4 is a first flow chart showing a processing procedure of the plant control device for control in case 1 in the first embodiment
- 7 is a second flowchart showing the processing procedure of the plant control device for control in case 1 in the first embodiment
- FIG. 4 is a first flow chart showing a processing procedure of the plant control device for control in case 2 in the first embodiment
- FIG. 10 is a second flow chart showing a processing procedure of the plant control device for control in case 2 in the first embodiment
- FIG. 4 is a schematic diagram showing an example of a data configuration of a parameter storage unit in the first embodiment
- FIG. It is a block diagram which shows the structure of the plant by 2nd Embodiment. It is a block diagram which shows the structure of the plant by 3rd Embodiment.
- FIG. 11 is a first flow chart showing a processing procedure of the plant control device for control in case 1 in the third embodiment
- FIG. FIG. 11 is a second flow chart showing a processing procedure of the plant control device for control in case 2 in the third embodiment
- a target term is a term to be controlled.
- a term of interest is a term having a length greater than or equal to 2 days and less than or equal to 3 months.
- the target term may be a term having a length of 2 days or more and 1 month or less, preferably 2 days or more and 2 weeks or less (but not limited to ).
- Various predictor data can be used to control the terms of interest. Prediction data are obtained based on data in other terms and predictions of the environment (climate, temperature, sunshine conditions, etc.). The relationship between terms and data will be further described later with reference to FIG.
- FIG. 1 is a block diagram showing the configuration of a manufacturing plant according to this embodiment.
- the plant 1 according to the present embodiment includes a first manufacturing device 10, a storage device 20, flow control valves 30, 31, and 32, a second manufacturing device 40, a power generation device 50, and a commercial It includes means 60 and a plant controller 201 .
- the power supply device 2 supplies power to at least the first manufacturing device 10 .
- a modification of the plant 1 can also be implemented.
- the plant 1 may be configured to include a power supply 2 .
- the power supply device 2 supplies power to the first manufacturing device 10 .
- the plant 1 may be configured to include neither the power supply device 2 nor the first manufacturing device 10 .
- the power supply device 2 and the first manufacturing device 10 exist outside the plant 1 .
- a first product (described later) manufactured by the first manufacturing apparatus 10 is transferred to the storage apparatus 20 .
- the first product is, for example, hydrogen (chemical formula: H 2 ). Hydrogen can be produced by electrolyzing water (H 2 O) using power supplied by the power supply device 2 .
- the second product is, for example, ammonia (the chemical formula is NH 3 ). Ammonia can be produced using the first product, hydrogen, and nitrogen (N 2 ) taken from the air.
- the second product is not limited to the ammonia exemplified above.
- the second product may be another substance (chemical substance) manufactured using hydrogen as one of the raw materials.
- the second product may be, for example, methanol, organic hydride, methane, carbon monoxide, light oil, hydrogen peroxide, liquid hydrogen, etc., but is not limited to the substances exemplified here.
- the power supply device 2 supplies at least the first manufacturing device 10 with power generated using variable renewable energy.
- the power supply device 2 may be a device that generates power using variable renewable energy. Further, the power supply device 2 may receive power generated by another device using variable renewable energy and supply the power to the first manufacturing device 10 .
- the power supply device 2 may be, for example, a power transmission facility (such as a power transmission line).
- Variable renewable energy is energy whose output fluctuates significantly depending on natural conditions.
- Variable renewable energy is also called, for example, “natural renewable energy” or “renewable energy”.
- Examples of variable renewable energy are solar energy, wind energy, tidal energy, and the like.
- Variable renewable energy is used to generate electricity.
- the first production device 10 uses at least the power supplied from the power supply device 2 (power obtained from variable renewable energy) to produce hydrogen by water electrolysis.
- the first manufacturing apparatus manufactures the first product using power supplied from the power supply apparatus 10 generated using variable renewable energy. That is, the first manufacturing apparatus 10 uses water (H 2 O) as a raw material to manufacture hydrogen (H 2 ) and oxygen (O 2 ).
- the hydrogen produced by the first production device 10 is delivered to the storage device 20 through a pipe or the like.
- the oxygen produced by the first production device 10 is transferred to another storage device (not shown) through, for example, piping.
- the storage device 20 receives the hydrogen produced by the first production device 10 and stores it at least temporarily.
- the storage device 20 is, for example, a tank for storing liquefied gas or gas.
- the storage device 20 is equipped with a meter for measuring the amount of hydrogen remaining in the device.
- the storage device 20 can pass data on the amount of hydrogen in the device to the plant controller 201 .
- a reference range for the amount of storage may be provided in the storage device 20 .
- the reference range is represented by at least one of the lower limit and upper limit of the amount of storage in the storage device 20 (for example, percentage or units such as normal cubic meters). For example, in order to maintain the operation of the second manufacturing apparatus 40, it may be necessary for the storage amount in the storage apparatus 20 to be equal to or greater than the above lower limit.
- the flow control valves 30, 31, and 32 are valves for controlling the flow rate of the first product supplied from the storage device 20, respectively.
- the flow control valve 30 is provided in the middle of a pipe or the like for supplying the first product from the storage device 20 to the second manufacturing device 40 .
- the flow control valve 31 is provided in the middle of a pipe or the like for supplying the first product from the storage device 20 to the power generation device 50 .
- the flow control valve 32 is provided in the middle of a pipe or the like for supplying the first product from the storage device 20 to the selling means 60 .
- Each of the flow control valves 30, 31, and 32 has, for example, a mechanism for steplessly varying the throttle opening. The throttle opening of each of the flow control valves 30 , 31 and 32 can be changed based on a control signal from the plant control device 201 .
- the second manufacturing device 40 is a device that uses the first product supplied from the storage device 20 as a raw material to manufacture a second product.
- Raw materials other than the first product, which are necessary for manufacturing the second product, are also supplied to the second manufacturing apparatus 40 .
- the second manufacturing apparatus 40 uses hydrogen and nitrogen as raw materials to manufacture ammonia (NH 3 ), which is the second product.
- the second production device 40 consumes hydrogen, which is the first product supplied from the storage device 20, as one of the raw materials.
- the second product manufactured by the second manufacturing apparatus 40 can be used by the operator who operates the plant 1, or can be sold to external operators.
- the business operator operating the plant 1 can receive the consideration.
- the sales price of the second product will be described later.
- the power generation device 50 generates power using the first product supplied from the storage device 20 .
- the power generator 50 converts the energy released when hydrogen is combusted (oxidized) into electrical energy.
- the structure itself of the electric power generation by the electric power generating apparatus 50 may use an existing technique.
- the electric power generated by the power generation device 50 can be consumed by the operator who operates the plant 1, or can be supplied to the outside using a power transmission line or power storage means.
- the business operator who operates the plant 1 can receive the compensation. That is, the power generated by the power generator 50 can be sold.
- the sales price of electricity here will be described later.
- the selling means 60 is a facility or device for selling the first product (as described above, for example, hydrogen) itself supplied from the storage device 20 .
- the selling means 60 may be, for example, a storage device (tank or the like) for storing the first product for sale, or a pipeline or the like for supplying the first product to another place. or equipment for loading onto a means of transport (including but not limited to ships, trucks, etc.).
- the sales means 60 is, for example, a tank for storing the first product, a pipe to another plant to be sold, or a pipe for loading onto a transportation means. good.
- sales means 60 may be other than the equipment and devices illustrated herein.
- the business operator who operates the plant 1 can receive the consideration.
- the sales price of the first product will be described later.
- the plant control device 201 controls the production of products by the plant 1.
- the plant control device 201 controls the supply amount of the first product from the storage device 20 to each of the second manufacturing device 40, the power generation device 50 and the sales means 60 in each term. . Therefore, the plant control device 201 outputs control signals for individually controlling the throttle openings of the flow control valves 30 , 31 , and 32 .
- the amount of the first product supplied from each of the flow control valves 30, 31, and 32 is the time integral of the product of each throttle opening and the flow velocity of the first product (flow length per unit time). be.
- the supply amount of the first product from each of the flow control valves 30, 31, and 32 is the time integral of the flow rate per unit time (the flow rate depends on the throttle opening of the flow control valve 30).
- Control may be performed by measuring the actual flow rate of the first product using a flow meter or the like and feeding back the measured flow rate to the plant control device 201 .
- One term has a length of, for example, two days or more and three months or less.
- One term may, for example, have a length of approximately two days or more and one month or less, preferably two days or more and two weeks or less.
- the length of one term is not limited to this. It should be noted that operating the plant continuously for a certain length of time according to a certain plan leads to an improvement in operational efficiency. If the length of one term is too short, the operating efficiency of the plant will be poor. Conversely, if the length of one term is too long, for example, environmental fluctuations (fluctuations in the amount of solar radiation, etc.) during the term will be too large, making it difficult to set an appropriate operation plan. Considering such circumstances, it is desirable to appropriately set the length of one term.
- FIG. 2 is a block diagram showing a schematic functional configuration inside the plant control device 201.
- the plant control device 201 includes a calculation unit 202, a control signal output unit 203, a power generation amount data supply unit 211, a power generation simulator 216, an electricity price data supply unit 221, and a product price data supply unit. 222 , a price data prediction model 226 , a storage amount data acquisition unit 228 , a supply amount record storage unit 229 , and a parameter storage unit 230 .
- the plant control device 201 is implemented using electronic circuits, for example.
- the plant control device 201 may be implemented using a computer and a program. Each part constituting the plant control device 201 may have a storage device as required.
- a storage device is realized by using, for example, a semiconductor memory or a magnetic hard disk.
- the functions of the respective units constituting the plant control device 201 are as follows.
- the computing unit 202 computes signal values and the like for controlling the plant 1 based on given conditions and data. Specifically, the calculation unit 202 calculates, for example, the plant 1 based on the amount of power supplied, the price of products in the market, the price of power in the market, etc., and the storage amount in the storage device 20. Find a signal value for a higher profit. Alternatively, the calculation unit 202 may obtain signal values for optimizing the profit of the plant 1 .
- the calculation unit 202 calculates a first price that is the unit selling price of the first product, a second price that is the unit selling price of the second product, and a third price that is the unit selling price of the electric power generated by the power generator. and , respectively. These pieces of information can be acquired by the plant control device 201 as described separately. Based on at least one of the first price, the second price, and the third price, the calculation unit 202 calculates a first supply amount, which is the supply amount of the first product to the sales means. Then, a second supply amount, which is the supply amount of the first product to the second manufacturing apparatus, and a third supply amount, which is the supply amount of the first product to the power generation apparatus, are determined.
- the calculation unit 202 can obtain the signal value output by the plant control device 201, for example, according to the following procedure. That is, the calculation unit 202 first determines the supply amount of the first product to each of the second manufacturing device 40, the power generation device 50, and the selling means 60 in the target term. The calculation unit 202 then obtains the opening degrees of the flow control valves 30, 31, and 32 based on the respective supply amounts. Then, the calculation unit 202 determines the signal values to be sent to each of the flow control valves 30, 31, and 32 for realizing the opening degree of each valve.
- the control signal output unit 203 outputs a control signal based on the result obtained by the calculation unit 202. Specifically, the control signal output unit 203 outputs control signals for controlling the opening degrees of the flow control valves 30 , 31 , and 32 . Thereby, the control signal output unit 203 controls the flow rate of the first product in each of the flow control valves 30 , 31 and 32 . Furthermore, the control signal output unit 203 outputs signals for controlling the operating states of the second manufacturing apparatus 40, the power generation apparatus 50, and the selling means 60, respectively.
- control signal output unit 203 outputs a control signal so that the first product is supplied to the means for sale at the first supply amount determined by the calculation unit 202 . Also, the control signal output unit 203 outputs a control signal so that the first product is supplied to the second manufacturing apparatus at the second supply amount determined by the calculation unit 202 . Further, the control signal output unit 203 outputs a control signal so that the first product is supplied to the power generator at the third supply amount determined by the calculation unit 202 .
- the power generation amount data supply unit 211 supplies the calculation unit 202 with data on either or both of the actual value and the predicted value of the power generation amount of the power supply device 2 .
- the amount of power generated by the power supply device 2 corresponds to the amount of power supplied to the first manufacturing device 10 .
- the power generation amount data supply unit 211 holds the actual value of the power generation amount for each past term and supplies it to the calculation unit 202 .
- the actual value of the power generation amount depends on the environment surrounding the power supply device 2 . Therefore, the power generation amount data supply unit 211 can also hold the environmental data for each past term in association with the actual value of the power generation amount, and supply it to the calculation unit 202 .
- the environmental data includes daily sunshine hours, changes in sunlight intensity, changes in temperature, changes in humidity, weather (sunny, cloudiness, rain, etc.). Even if the power supply device 2 is a facility other than a photovoltaic power generation facility, the environment data includes data of factors that influence the amount of power supplied by the power supply device 2 .
- the power generation amount data supply unit 211 also obtains (or holds) a predicted value of the power generation amount in the current term or future term, and supplies it to the calculation unit 202 .
- the power generation amount data supply unit 211 predicts the power generation amount of the power supply device 2 that fluctuates seasonally (monthly) based on, for example, the correlation between the past environmental data and the actual power generation amount data.
- the power generation amount data supply unit 211 may supply the calculation unit 202 with the predicted value of the power generation amount of the power supply device 2 based on the simulation result by the power generation simulator 216 as necessary.
- the power generation amount data supply unit 211 may acquire short-term (several hours if short) or long-term (several months or about a year if long) weather forecast data from the outside or the like. In this case, the power generation amount data supply unit 211 can supply the calculation unit 202 with the predicted value of the power generation amount of the power supply device 2 based on the weather forecast data.
- the power generation simulator 216 simulates power generation based on the data supplied by the power generation amount data supply unit 211 (the above environmental data, weather forecast data, etc.) and the current environment (date, time, amount of sunshine, temperature, etc.). I do.
- the power generation simulator 216 can pass the predicted value of the power generation amount, which is the simulation result, to the calculation unit 202 and the power generation amount data supply unit 211 .
- the electricity price data supply unit 221 supplies the electricity price (unit price) data in the market or the like to the calculation unit 202 .
- the power price here is, for example, the price when the operating company of the plant 1 sells the power.
- the price data is numerical data expressed in a predetermined currency per unit electric energy.
- the power price data supply unit 221 may pass data on the current price and future price of power to the calculation unit 202 .
- the future price may be a price in the futures market of electricity, or may be a future price predicted by a price data prediction model 226, which will be described later.
- the data of the predicted value of the power price supplied by the power price data supply unit 221 is updated at a predetermined frequency.
- power price (predicted value) data is updated once every 10 minutes.
- the update frequency is not limited to the frequencies exemplified here.
- the product price data supply unit 222 supplies the product price (unit price) data in the market or the like to the calculation unit 202 .
- the manufactured product includes the first manufactured product and the second manufactured product.
- the product price here is, for example, the price when the operating company of the plant 1 sells the first product and the second product.
- Price data is numerical data expressed in a predetermined currency per unit amount of a substance.
- the product price data supply unit 222 may pass the current price and future price data of the first product and the second product to the calculation unit 202 .
- the future price may be a price in the futures market of a product or the like, or may be a future price predicted by a price data prediction model 226, which will be described later.
- the data of the predicted prices of the first product and the second product supplied by the product price data supply unit 222 are updated at a predetermined frequency.
- data on prices (predicted values) of the first product and the second product are updated once a month.
- the update frequency is not limited to the frequencies exemplified here.
- the price data prediction model 226 is, for example, a machine-learned model or a machine-learnable model.
- the price data prediction model 226 predicts the future prices of the above electricity prices or product prices based on the input data.
- the data input to predict electricity prices may include, for example, past seasonal electricity price data, fuel (crude oil, etc.) price data, and economic indicators (business trends, etc.) related to demand. However, it is not limited to those exemplified here.
- the data input to predict product prices may include, for example, past seasonal product price data and economic indicators (business trends, etc.) regarding demand for each product, but here It is not limited to those illustrated.
- the price data prediction model 226 outputs a predicted value of the future price of electricity or a predicted value of the future price of products according to the state of the learned model (values of internal parameters, etc.) and input data.
- a neural network which is an existing technology, can be used.
- the price data prediction model 226 can pass the future value (predicted value) of the power price that it has obtained to the calculation unit 202 and the power price data supply unit 221 .
- the price data prediction model 226 can pass the future value (predicted value) of the price of the product obtained by itself to the calculation unit 202 and the product price data supply unit 222 .
- the method by which the price data prediction model 226 uses a machine learning technique to predict the future price of electricity and the future price of products is an example.
- the plant control device 201 may use other techniques to predict the future price of electricity and the future price of products.
- the storage amount data acquisition unit 228 acquires from the storage device 20 data on the amount of the first product stored in the storage device 20 (tank) at that time.
- the actual supply amount storage unit 229 stores data on the past actual supply amounts of the first product supplied to the second manufacturing apparatus 40, the power generation apparatus 50, and the sales means 60, respectively.
- the actual supply amount storage unit 229 stores the amount of the first product supplied to each device or the like in association with the time axis (for example, by term or by day).
- the parameter storage unit 230 stores parameter values necessary for the plant control device 201 to operate.
- the parameter values stored in the parameter storage section 230 can be rewritten by a predetermined procedure. That is, by rewriting the parameter values stored in the parameter storage unit 230, the behavior of the plant 1 can be appropriately controlled. Specific parameters stored in the parameter storage unit 230 will be described later with reference to another drawing.
- control logic and the like by the plant control device 201 will be described.
- a plurality of types of control methods by the plant control device 201 are conceivable. Control methods for each of the plurality of cases will be described below with reference to flowcharts and the like.
- FIG. 3 is a schematic diagram showing the relationship between terms (periods) and data common to each case described below.
- FIG. 3 shows a series of terms arranged on the time axis. Each term is indexed by an integer value.
- T(N) is the term currently being controlled.
- T (NK-2), the term T (NK-1), and the term T (NK) are arranged side by side, and the term T (N) is shown.
- N and K are integers.
- the term T(N) to be controlled is called a target term for convenience. Note that in FIG. 3, the current date and time is included in the term T(N ⁇ K).
- the target term is a term containing the current date and time or a term in the future, it is necessarily K ⁇ 0.
- data corresponding to each term there is data corresponding to each term.
- the data is also indexed with the same index value as the term. That is, data for term T(N ⁇ K) is data D(N ⁇ K), data for term T(N) is data D(N), and so on.
- Data for each term may include predicted values and actual values. However, a future term (term T(N) in the example of FIG. 3) naturally cannot have an actual value. Data for each term may or may not have a predicted value. Also, the data of each term may or may not have a performance value.
- the predicted value data includes the predicted value of the power generation amount supplied by the power generation amount data supply unit 211, the predicted value of the power generation amount obtained by the power generation simulator 216, and the power price data supplied by the power price data supply unit 221. It may include forecasts, forecasted product prices supplied by product price data provider 222 , and forecasted electricity prices or product prices forecasted by price data forecasting model 226 .
- the actual value data includes the actual power generation amount supplied by the power generation amount data supply unit 211, the power price actual value supplied by the power price data supply unit 221, and the product price data supply unit 222. may include historical product prices.
- the data of the actual value is the supply amount of the first product to each of the second manufacturing apparatus 40, the power generating apparatus 50, and the sales means 60 in each past term, which is stored in the supply amount actual storage unit 229. may contain data for Further, the actual value data may include the amount of products or the amount of power generation output by the second manufacturing apparatus 40, the power generation apparatus 50, and the means for sale 60, which are stored in the actual supply amount storage unit 229. .
- the calculation unit 202 can access the data of the target term, and obtains a control value for controlling the plant 1 based on the data of the target term.
- Case 1 The basic idea in Case 1 is to first consider the amount of production of the second product (e.g. ammonia) with priority, and then consider the distribution of usage of the surplus first product (e.g. hydrogen). . In other words, in Case 1, the highest priority is to keep the second manufacturing apparatus running continuously.
- the second product e.g. ammonia
- the surplus first product e.g. hydrogen
- FIG. 4 is a first flow chart showing the processing procedure of the plant control device 201 for control in Case 1.
- FIG. Description will be made below along this flow chart.
- step S111 the calculation unit 202 acquires the power supply forecast data and the storage amount data of the first product (hydrogen) in the term preceding the target term.
- the power supply amount forecast data is a forecast value of the amount of power supplied from the power supply device 2 in the target term.
- Data on the storage amount of the first product in the term preceding the target term is measured by the measuring device of the storage device 20 .
- the storage amount of the first product may be obtained by reflecting the production and consumption of the first product in the measurement result of the measuring device.
- the calculation unit 202 predicts the storage amount of the first product (hydrogen) in the target term (also called the current term). Specifically, the calculation unit 202 predicts the storage amount of the first product in the target term based on the storage amount of the first product in the term preceding the target term acquired in step S111. However, the calculation unit 202 calculates the production amount of the first product based on the power supply amount (actual value or predicted value) of the previous term of the target term or based on the power supply amount prediction data of the neighboring term of the target term. and, as a result, predict the stock of the first product for the above term of interest.
- the power supply amount actual value or predicted value
- step S113 the calculation unit 202 determines whether or not the predicted value (calculated in step S112) of the storage amount of the first product for the target term (also called the current term) is equal to or greater than a predetermined threshold (LLL). do.
- LLL is the lower limit of the reference range of the first product in the storage device 20 .
- the calculation unit 202 determines the opening degree of the flow control valve 30 in order to change the supply amount of the first product to the second manufacturing apparatus 40 . Further, the calculation unit 202 takes over the data of the predicted value of the storage amount of the first product to the processing of FIG. 5 described below.
- the plant control device 201 stops the second manufacturing device.
- FIG. 5 is a second flowchart showing the processing procedure of the plant control device 201 for control in case 1. Description will be made below along this flow chart.
- step S121 the calculation unit 202 calculates the predicted value of the electricity sales price (unit price) in the target term (also called the current term), the predicted value of the first product sales price (unit price), and the second product sales price ( unit price) and the hydrogen storage amount (predicted value) in the target term.
- the hydrogen storage amount (predicted value) in the target term is the value obtained by the calculation unit 202 in step S114 of FIG.
- step S122 the calculation unit 202 determines whether the predicted value of the second product sales price (unit price) obtained in S121 is equal to or greater than a predetermined threshold (TH_NH3_PRICE).
- TH_NH3_PRICE is a threshold for the second product unit price. If the predicted value of the second product sales price (unit price) is equal to or higher than TH_NH3_PRICE (step S122: YES), the process proceeds to step S123. If the predicted value of the second product sales price (unit price) is less than TH_NH3_PRICE (step S122: NO), the process proceeds to step S124.
- the calculation unit 202 determines whether the storage amount (predicted value) of the first product in the storage device 20 in the target term (also referred to as the current term) is equal to or greater than the predetermined threshold value HHL. judge.
- the value HHL is the upper limit of the reference range of the first product in the storage device 20 . If the storage amount (predicted value) of the first product is equal to or greater than the threshold value HHL (step S123: YES), the process proceeds to step S124. If the storage amount (predicted value) of the first product is less than the threshold value HHL (step S123: NO), the process proceeds to step S127.
- the calculation unit 202 determines whether or not the predicted unit price of electricity for the target term is greater than or equal to the threshold TH_ELE_PRICE.
- the threshold TH_ELE_PRICE is a reference value for determining whether the sale of electricity is more advantageous than the sale of the first product. If the predicted electric power sales unit price for the target term is greater than or equal to the threshold TH_ELE_PRICE (step S124: YES), the process proceeds to step S125. If the predicted electric power sales unit price for the target term is less than the threshold TH_ELE_PRICE (step S124: NO), the process proceeds to step S126.
- the calculation unit 202 When proceeding to step S125, the calculation unit 202 performs control for using the surplus first product after being allocated to manufacture the second product for power generation. Specifically, the calculation unit 202 obtains the amount of the first product to be supplied to the second manufacturing apparatus 40 . Further, the calculation unit 202 obtains the amount of the first product to be supplied to the power generation device 50 so as to generate power using all other first products. The calculation unit 202 controls the opening degrees of the flow control valves 30, 31, and 32 based on the calculated amounts.
- the calculation unit 202 When proceeding to step S126, the calculation unit 202 performs control to sell the surplus first product after being allocated to the manufacturing of the second product. Specifically, the calculation unit 202 obtains the amount of the first product to be supplied to the second manufacturing apparatus 40 . The computing unit 202 also determines the quantity of the first product to be supplied to the vending facility 60 so that all other first products are for sale. The calculation unit 202 controls the opening degrees of the flow control valves 30, 31, and 32 based on the calculated amounts.
- the calculation unit 202 When proceeding to step S127, the calculation unit 202 performs control for accumulating in the storage device 20 the surplus first product after being allocated to manufacture the second product. Specifically, the calculation unit 202 performs control such that the opening degree of the flow control valve 30 becomes a predetermined value (throttle opening degree according to the rated production volume of the second manufacturing apparatus 40). is supplied to the second manufacturing apparatus 40. Further, the calculation unit 202 performs control such that the opening degrees of the flow control valves 31 and 32 are zero, so that the first product is not supplied to the power generation device 50 and the sales means 60 .
- the calculation unit 202 first determines the second supply amount, and then calculates the first supply amount based on at least one of the first price and the third price. Either the third supply amount is made larger than the third supply amount or the first supply amount is made larger than the third supply amount. That is, the calculation unit 202 determines the first, second and third supply amounts so as to increase the profit of the plant. Note that, in the control of this case 1, the calculation unit 202 sets the first supply amount to zero especially when the third supply amount is made larger than the first supply amount, or When increasing the first supply amount, the third supply amount may be zero.
- the threshold is a reference value that can be regarded as a statistically peculiar soaring or crashing region based on the standard deviation of price fluctuations.
- Case 2 The basic idea in Case 2 is to first consider what it is profitably profitable to manufacture (or generate power) overall, and then to determine the load for manufacturing the second product. To reflect.
- FIG. 6 is a first flow chart showing the processing procedure of the plant control device 201 for control in Case 2.
- FIG. Description will be made below along this flow chart.
- step S211 the calculation unit 202 converts the data of the predicted electric power sales price (unit price), the predicted first product sales price (unit price), and the second product sales price (unit price). get. These predicted values are the predicted values for the term of interest.
- step S212 the calculation unit 202 determines whether the predicted value of the second product sales price (unit price) acquired in step S211 is equal to or greater than a predetermined threshold TH_NH3_PRICE.
- This value TH_NH3_PRICE is a threshold for the price of the second product. If the predicted value of the second product sales price (unit price) is equal to or greater than the threshold TH_NH3_PRICE (step S212: YES), the process proceeds to step S216. If the predicted value of the second product sales price (unit price) is less than the threshold TH_NH3_PRICE (step S212: NO), the process proceeds to step S213.
- step S213 the calculation unit 202 determines whether or not the predicted value of the electricity sales price (unit price) is equal to or greater than the threshold TH_ELE_PRICE.
- This value TH_ELE_PRICE is a threshold for the price of electricity. If the predicted value of the electricity sales price (unit price) is equal to or greater than the threshold TH_ELE_PRICE (step S213: YES), the process proceeds to step S215. If the predicted value of the electricity sales price (unit price) is less than the threshold TH_ELE_PRICE (step S213: NO), the process proceeds to step S214.
- the calculation unit 202 performs control for selling the first product. Specifically, the calculation unit 202 determines that the opening degree of the flow control valve 32 is a predetermined value (for example, on the premise that all the first products manufactured during the target term are sold, A predetermined amount of the first product is supplied to the means for sale 60 by performing control such that the throttle opening is reached. Further, the calculation unit 202 performs control such that the opening degrees of the flow control valves 30 and 31 are zero, so that the first product is not supplied to the second manufacturing apparatus 40 and the power generation apparatus 50 .
- a predetermined value for example, on the premise that all the first products manufactured during the target term are sold
- the calculation unit 202 performs control for generating power using the first product and selling the power obtained by the power generation. Specifically, the calculation unit 202 determines that the degree of opening of the flow control valve 31 is a predetermined value (for example, on the premise that all the first products manufactured during the target term are used for power generation, A predetermined amount of the first product is supplied to the power generation device 50 by performing control such that the throttle opening is adjusted accordingly. Further, the calculation unit 202 performs control such that the opening degrees of the flow control valves 30 and 32 are zero, so that the first product is not supplied to the second manufacturing apparatus 40 or the sales means 60. .
- a predetermined value for example, on the premise that all the first products manufactured during the target term are used for power generation
- the calculation unit 202 When proceeding to step S216, the calculation unit 202 performs control for manufacturing the second product. Further, the calculation unit 202 passes data on the supply amount of the first product supplied to the second manufacturing apparatus 40 for the processing in FIG. Specifically, the calculation unit 202 determines that the degree of opening of the flow control valve 30 is a predetermined value (for example, the first product that corresponds to the optimum production amount of the second product based on the prediction in step S222 described later). A predetermined amount of the first product is supplied to the second manufacturing apparatus 40 by performing control such that the throttle opening corresponding to the supply amount of . Further, the calculation unit 202 performs control such that the opening degrees of the flow control valves 31 and 32 are zero, so that the first product is not supplied to the power generation device 50 and the sales means 60 .
- a predetermined value for example, the first product that corresponds to the optimum production amount of the second product based on the prediction in step S222 described later.
- a predetermined amount of the first product is supplied to the second manufacturing apparatus 40 by performing
- FIG. 7 is a second flowchart showing the processing procedure of the plant control device 201 for control in case 2. The process shown in FIG. 7 is entered only when the process shown in FIG. 6 reaches step S216 due to a conditional branch. Description will be made below along the flow chart of FIG.
- step S221 the calculation unit 202 acquires data on the amount of the first product supplied to the second manufacturing apparatus 40 and the amount of storage in the storage apparatus 20 for the term preceding the target term.
- the amount of the first product supplied to the second manufacturing apparatus 40 is data passed in the process of step S216 in the flowchart of FIG.
- step S222 the computing unit 202 predicts the storage amount of the first product in the storage device 20 for the target term (also called the current term). Also, based on the amount of the first product supplied to the second manufacturing apparatus 40 acquired in step S221, the amount of the second product manufactured by the second manufacturing apparatus for the target term is calculated. The storage amount of the first product in the storage device 20 in the target term is calculated based on the storage amount in the term preceding the target term and the power supply amount (predicted value) from the power supply device 2 in the target term.
- step S223 the calculation unit 202 determines whether the storage amount of the first product in the storage device 20 in the target term (also called the current term), which is the result of the prediction in step S222, is equal to or greater than a predetermined threshold. judge.
- the threshold here is the value LLL.
- the value LLL is the value corresponding to the lower limit of the reference range on the storage device 20 . If the predicted storage amount of the first product in the storage device 20 is equal to or greater than the threshold LLL (step S223: YES), the process proceeds to step S224. If the predicted storage amount of the first product in the storage device 20 is less than the threshold LLL (step S223: NO), the process proceeds to step S225.
- the calculation unit 202 determines that the degree of opening of the flow control valve 30 is a predetermined value (for example, the amount of the first product based on the amount of the second product obtained in step S222).
- the supply amount of the first product to the second manufacturing apparatus 40 is changed by performing control such that the opening degree of the throttle is changed.
- the calculation unit 202 also outputs the predicted value of the hydrogen storage amount in the target term (also called the current term).
- step S ⁇ b>225 the calculation unit 202 stops the operation of the second manufacturing apparatus 40 .
- threshold determination method in case 2 may be the same as the method described in case 1.
- the calculation unit 202 when the second price is equal to or higher than the predetermined reference value, the calculation unit 202 increases the second supply amount more than the first supply amount, The second supply amount is made larger than the third supply amount. That is, the calculation unit 202 determines the first, second and third supply amounts so as to increase the profit of the plant. Note that, in the control of case 2, when the second price is equal to or higher than a predetermined reference value, the calculation unit 202 may set the first supply amount to zero and the third supply amount to zero.
- the calculation unit 202 controls the supply amount of the first product to the second manufacturing apparatus 40 so as to improve (or optimize) the value of the evaluation function under given constraint conditions, A supply amount of the first product to the power generation device 50 and a supply amount of the first product to the sales means 60 are obtained.
- the supply amount of the first product to the sales means 60 is q1
- the supply amount of the first product to the second manufacturing device 40 is q2
- the first product to the power generation device 50 is q2.
- q3 be the supply of the product.
- Smin is the lower limit of the amount of the first product that can be supplied from the storage device 20 downstream (the second manufacturing device 40, the power generation device 50, and the sales means 60 side) in the target term.
- Smax is the upper limit of the amount of the first product that can be supplied downstream from the storage device 20 in the target term.
- Smin and Smax are the storage amount (actual value or predicted value) of the storage device 20 immediately before the target term, the power supply amount (usually the predicted value) from the power supply device 2 in the target term, or the storage amount of the storage device 20 It can be determined based on a reference range of amounts (lower and upper limits).
- Lmin is the lower limit of the amount of the first product to be supplied to the second manufacturing apparatus 40. If the second manufacturing apparatus 40 is a large-scale manufacturing plant and it is required to operate the second manufacturing apparatus 40 continuously, the value of Lmin is determined as an appropriate value.
- E is the value that Plant 1 creates in the target term. E may be, for example, sales or profit.
- ⁇ 1 is the value per unit supply of the first product obtained by selling the first product.
- ⁇ 2 is the value per unit supply of the first product obtained from the sale of the second product.
- ⁇ 3 is the value per unit supply of the first product obtained by power generation.
- ⁇ 1 depends on the unit price (for example, predicted value) of the first product in the target term.
- ⁇ 2 depends on the unit price (for example, predicted value) of the second product in the target term.
- ⁇ 3 depends on the unit price of electricity (for example, predicted value) in the target term.
- the calculation unit 202 determines the values of q1, q2, and q3 so that the evaluation function value E is optimized or has a better value (larger value). In other words, the calculation unit 202 determines the values of q1, q2, and q3 based on the evaluation function value E. Since E is a linear expression for q1, q2, and q3, the calculation unit 202 can determine the values of q1, q2, and q3 with a simple procedure.
- the calculation unit 202 acquires the data of the given first price, second price, and third price. Then, the calculation unit 202 determines that the evaluation function value determined by the first supply amount (q1), the second supply amount (q2), and the third supply amount (q3) is a better value under the given constraint conditions. The first supply amount, the second supply amount, and the third supply amount are calculated so that In other words, the calculation unit 202 determines the first supply amount, the second supply amount, and the third supply amount based on the evaluation function value.
- FIG. 8 is a schematic diagram showing a configuration example of data stored in the parameter storage unit 230 of the plant control device 201.
- the parameter storage unit 230 stores values for individual parameters.
- the parameter storage unit 230 stores, for example, the lower limit of the reference range of the remaining amount of the storage device (label name: LLL), the upper limit of the reference range of the remaining amount of the storage device (label name: HHL), ammonia (the 2 product) price (unit price) (label name: TH_NH3_PRICE) and electric power price (unit price) (label name: TH_ELE_PRICE).
- the parameter storage unit 230 may further hold information on other parameters.
- the parameters exemplified here are also mentioned in the procedure for control above.
- the parameter values are set by, for example, an administrator of the plant 1 or the like.
- the lower limit of the reference range of the remaining amount of the storage device is 3000 [normal cubic meters]
- the upper limit of the reference range of the remaining amount of the storage device is 300000 [normal cubic meters]
- the judgment value for the price of ammonia is 500 [normal cubic meters].
- the decision value for the price of electricity is set at 0.13 [US$/kWh], respectively.
- the plant 1 was equipped with both a power generator 50 and means of sale 60 .
- the plant 1 may include only at least one of the power generation device 50 and the sales means 60 .
- At least one of the power generation device 50 and the sales means 60 provided in the plant 1 may be referred to as a "supply target facility" as the target facility for supplying the first product.
- the calculation unit 202 of the plant control device 201 acquires the first price, which is the unit selling price of the first product, when the plant 1 includes the sales means 60 . Further, the calculation unit 202 acquires the third price, which is the selling price of the power generated by the power generation device 50 when the plant 1 includes the power generation device 50 . That is, depending on whether the plant 1 includes the power generation device 50 or the sales means 60, the calculation unit 202 calculates the first price, which is the sales unit price of the first product, and the sales unit price of the second product. At least one (or more) of the second price and the third price, which is the selling price of the power generated by the power generation device, is obtained.
- the calculation unit 202 determines at least one of the first price, the second price, and the third price (of these prices, the calculation unit 202 Based on the acquired first price, second price, and/or third price), a first supply amount, which is the supply amount of the first product to the selling means 60, is determined. Further, when the plant 1 includes the power generation device 50, the computing unit 202 determines at least one of the first price, the second price, and the third price (of these prices, the computing unit 202 acquires A third supply amount, which is the supply amount of the first product to the power generation device 50, is determined based on at least one of the first price, the second price, and the third price.
- control signal output unit 203 when the plant 1 includes means for sale 60, the control signal output unit 203 outputs a control signal so that the first product is supplied to the means for sale 60 at the determined first supply amount. Further, when the plant 1 includes the power generation device 50, the control signal output unit 203 outputs a control signal so that the first product is supplied to the power generation device 50 at the determined third supply amount.
- An example of the plant control method in this modified example is as follows. That is, the calculation unit 202 first determines the supply amount (second supply amount) of the first product to the second manufacturing apparatus 40 . After that, the following control is performed. If the plant 1 includes a means of sale 60 , the computing unit 202 determines to supply the means of sale 60 with the first product and, as a result, supplies the first product to the means of sale 60 . is determined as a value greater than zero (first supply amount). When the plant 1 includes the power generation device 50, the calculation unit 202 determines to supply the first product to the power generation device 50, and as a result, the supply amount of the first product to the power generation device 50 is (third supply amount) is determined as a value greater than zero.
- step S124 If the plant 1 does not have the power generator 50, there is no need to make the determination in step S124 in the flowchart shown in FIG. In other words, without making the determination in step S124, the process always proceeds to step S126.
- step S124 determines whether the plant 1 does not have sales means 60. If the plant 1 does not have sales means 60, there is no need to make the determination in step S124 in the flowchart shown in FIG. In other words, without making a decision in step S124, the process always proceeds to step S125.
- step S213 If the plant 1 does not have the power generator 50, there is no need to make the determination in step S213 in the flowchart shown in FIG. In other words, without making the determination in step S213, the process always proceeds to step S214.
- step S213 the determination in step S213 in the flowchart shown in FIG. That is, without making a determination in step S213, the process always proceeds to step S215.
- the calculation unit 202 when the second price is equal to or higher than the predetermined reference value, the calculation unit 202 sets the second supply amount to be larger than the supply amount of the first product to the supply target equipment. do. Further, in “Case 2", when the second price is equal to or higher than the predetermined reference value, the calculation unit 202 may set the supply amount of the first product to the supply target facility to zero.
- the calculation unit 202 when at least two of the first price, the second price, and the third price are given, the calculation unit 202, under given constraint conditions, Based on a predetermined evaluation function value determined by at least two of the first supply amount, the second supply amount, and the third supply amount, the second supply amount and the first production to the supply target equipment You may make it obtain
- At least part of the functions of the plant control device in the above-described embodiments can be realized by a computer.
- a program for realizing this function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed.
- the "computer system” referred to here includes hardware such as an OS and peripheral devices.
- “computer-readable recording media” refers to portable media such as flexible discs, magneto-optical discs, ROMs, CD-ROMs, DVD-ROMs, USB memories, and storage devices such as hard disks built into computer systems. Say things.
- “computer-readable recording medium” means a medium that temporarily and dynamically retains a program, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. , it may also include something that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in that case. Further, the program may be for realizing part of the functions described above, or may be a program capable of realizing the functions described above in combination with a program already recorded in the computer system.
- the plant control device 201 controls the second manufacturing device according to the price of the first product, the price of the second product, and the price of electricity. 40, the power generation device 50, and the sales means 60 are controlled to change the supply amount of the first product. With such a configuration of the present embodiment, it is possible to perform control for increasing profit from the operation of the plant 1 .
- FIG. 9 is a block diagram showing the configuration of the plant according to this embodiment.
- the plant 6 according to the present embodiment includes a first manufacturing device 10, a storage device 20, flow control valves 30, 31, and 32, a second manufacturing device 40, a power generation device 50, and a commercial It includes a means 60 , a plant control device 241 and a power distribution device 101 .
- a feature of this embodiment is that the plant 6 includes a power distribution device 101 .
- the power distribution device 101 distributes the power supplied by the power supply device 2 . Specifically, the power distribution device 101 distributes power to the first manufacturing device 10 and the power sales facility. The power distribution device 101 can supply power to both the first manufacturing device 10 and the power sales facility at a certain point in time, or to either the first manufacturing device 10 or the power sales facility. can also be supplied.
- Electric power sales facilities are facilities for selling electric power to the outside.
- the power sales facility may be, for example, a facility for power transmission or a facility for power storage.
- the plant control device 241 in this embodiment has the same functions as the plant control device 201 described in the first embodiment. Furthermore, the plant control device 241 controls the power distribution device 101 described above. That is, the plant control device 241 determines whether the power distribution device 101 supplies power only to the first manufacturing device 10 side or only to the power sales equipment side, or determines whether the power distribution device 101 supplies power only to the first manufacturing device 10 side and the power sales equipment side. You can control whether power is supplied to both the equipment side.
- the plant control device 241 performs the following controls.
- the calculation unit 202 included in the plant control device 241 acquires the fourth price, which is the selling price of the power supplied from the power supply device 2, from an external device or the like via, for example, a communication line. Then, the calculation unit 202 determines the power supply amount for sale, which is the amount of power supplied to the power sales facility, based on at least the fourth price. Then, the control signal output unit 203 outputs a control signal so that the electricity is supplied from the power distribution device 101 to the power sales facility at the determined power supply amount for sale.
- the operation of the second manufacturing apparatus 40 is prioritized.
- the first manufacturing apparatus 10 is used to manufacture the first product necessary for operating the second manufacturing apparatus 40 .
- the margin of the power supplied from the power supply device 2 is supplied to the power sales facility, or the first manufacturing device 10 is used to manufacture the first product. It is determined whether to supply to That is, when the fourth price is equal to or higher than a predetermined threshold, the margin of the power is supplied to the power sales facility. Conversely, if the fourth price is less than the predetermined threshold, the surplus power is supplied to the first manufacturing apparatus 10 .
- the first referring to the first price, second price, third price and fourth price, the first Select one of manufacturing a product, manufacturing a second product, and selling electric power.
- the plant 6 may have at least one of the power generation device 50 and the means for sale 60 to be supplied.
- the calculation unit 202 acquires at least one of the first price and the third price depending on which supply target facility the plant 6 has. Based on at least one of the first price, the second price, the third price, and the fourth price, the calculation unit 202 determines the sales price, which is the amount of power supplied to the power sales facility. determine the amount of power to be supplied.
- FIG. 10 is a block diagram showing the configuration of the plant according to this embodiment.
- the plant 7 according to this embodiment includes a first production device 10, a nitrogen production device 15, a storage device 20, flow control valves 30, 31, 32, 33, and 34, and a second production device. 40 , power plant 50 , means of sale 60 , means of nitrogen sale 70 , and plant controller 242 .
- a feature of this embodiment is that the plant 7 includes a nitrogen production device 15 and means for selling nitrogen 70 .
- the first product manufactured by the first manufacturing apparatus 10 is hydrogen. That is, the first manufacturing apparatus 10 manufactures hydrogen (H 2 ) and oxygen (O 2 ) by electrolyzing water (H 2 O).
- a second product manufactured by the second manufacturing apparatus 40 is ammonia (NH 3 ). That is, the second production device 40 produces ammonia using the hydrogen produced by the first production device 10 and the nitrogen (N 2 ) produced by the nitrogen production device 15 .
- the nitrogen produced by the nitrogen production device 15 can be used for ammonia production, or the nitrogen itself produced by the nitrogen production device 15 can be sold to an external business operator or the like. .
- the nitrogen production device 15 is a device that produces nitrogen using variable renewable energy (electric power) or system stable power. Specifically, the nitrogen production device 15 produces nitrogen by separating nitrogen contained in the air. That is, the nitrogen production device 15 is an air separation unit (ASU, Air Separation Unit). The nitrogen production device 15 may separate nitrogen from the air by cryogenic separation, membrane separation, PSA (Pressure Swing Adsorption), TSA (Thermal Swing Adsorption), or the like. However, the method by which the nitrogen production device 15 produces nitrogen is not limited to the one exemplified here. Nitrogen produced by the nitrogen production device 15 can be supplied to the second production device 40 and the means for selling nitrogen 70 .
- ASU Air Separation Unit
- the means for selling nitrogen 70 is a facility or a device for selling the nitrogen produced by the nitrogen production device 15 .
- the means for selling nitrogen 70 may be, for example, a storage device (tank or the like) for storing nitrogen for sale, or a pipeline or the like for supplying nitrogen to other places. It may also be a facility for loading onto a vehicle (including but not limited to ships, trucks, etc.).
- the means of sale 70 of nitrogen may be, for example, either a tank for storing nitrogen, a line to another plant to which it is sold, or a line for loading onto a vehicle.
- the nitrogen sales means 70 may be other than the equipment and devices illustrated herein.
- the flow control valves 33 and 34 are valves for controlling the flow rate of nitrogen supplied from the nitrogen production device 15, respectively.
- the flow control valve 33 is provided in the middle of a pipe or the like for supplying nitrogen from the nitrogen production device 15 to the nitrogen sales means 70 .
- the flow control valve 34 is provided in the middle of a pipe or the like for supplying nitrogen from the nitrogen production device 15 to the second production device 40 .
- Each of the flow control valves 33 and 34 has, for example, a mechanism for steplessly varying the throttle opening. The throttle opening of each of the flow control valves 33 and 34 can be changed based on control signals from the plant control device 242 .
- the plant control device 242 in this embodiment has the same functions as the plant control device 201 described in the first embodiment. Further, the plant controller 242 controls each of the flow control valves 33 and 34 described above. That is, the plant control device 242 can control the nitrogen flow rate (supply amount per unit time) to each of the nitrogen sales means 70 and the second manufacturing device 40 . In addition, the plant control device 242 can acquire a signal for grasping the operating status (operating capacity, etc.) of the nitrogen production device 15 and can control the operation of the nitrogen production device 15 .
- the plant control device 242 determines and controls the amount of nitrogen to be supplied to each of the means for selling nitrogen 70 and the second manufacturing device 40 as follows. That is, as described above, the second production apparatus 40 in this embodiment is an apparatus for producing ammonia, and the amount of nitrogen to be supplied to the second production apparatus 40 is automatically adjusted according to the load of the second production apparatus 40. can decide. On top of that, if the nitrogen production device 15 has a surplus capacity (operating margin) and the sales price of nitrogen is higher than a predetermined threshold, the load on the nitrogen production device 15 is increased. can be done. That is, in such a case, the plant control device 242 controls to increase the load of the nitrogen production device 15 and controls the throttle opening of the flow control valve 33 so that the produced nitrogen is used as a means for selling nitrogen. 70.
- FIG. 11 is a flowchart corresponding to FIG. 4 (first flowchart for control in case 1) in the first embodiment.
- FIG. 12 is a flowchart corresponding to FIG. 7 (second flowchart for control in case 2) in the first embodiment. Below, it demonstrates along each of FIG.11 and FIG.12.
- Steps S111 to S115 in FIG. 11 are the same as the processes already described with reference to FIG.
- step S116 the calculation unit 202 in the plant control device 242 determines whether the nitrogen production capacity of the nitrogen production device 15 has a surplus and the nitrogen selling price is equal to or higher than a predetermined threshold. If the nitrogen production device 15 has sufficient nitrogen production capacity and the nitrogen sales price is equal to or higher than the predetermined threshold (step S116: YES), the process proceeds to step S117. Otherwise (step S116: NO), the process proceeds to step S118.
- the plant control device 242 controls to further increase nitrogen production and supply the increased nitrogen production to the nitrogen sales means 70 . That is, the plant control device 242 controls the operation of the nitrogen production device 15 in such a manner. The plant control device 242 also controls the throttle opening of the flow control valve 33 so that a predetermined amount of increased production nitrogen for sale is supplied to the nitrogen sales means 70 .
- step S ⁇ b>118 the plant 6 operates the second manufacturing equipment 40 according to the control values of the second manufacturing equipment 40 . That is, the plant control device 242 thus controls the operation of the nitrogen production device 15 and the throttle opening of each of the flow control valves 33 and 34 .
- Steps S221 to S225 in FIG. 12 are the same as the processing already described with reference to FIG.
- step S226 the calculation unit 202 in the plant control device 242 determines whether the nitrogen production capacity of the nitrogen production device 15 has a surplus and the nitrogen sales price is equal to or higher than a predetermined threshold. If the nitrogen production device 15 has sufficient nitrogen production capacity and the nitrogen sales price is equal to or higher than the predetermined threshold (step S226: YES), the process proceeds to step S227. Otherwise (step S226: NO), the process proceeds to step S228.
- the plant control device 242 controls to further increase nitrogen production and supply the increased nitrogen production to the nitrogen sales means 70 . That is, the plant control device 242 controls the operation of the nitrogen production device 15 in such a manner. The plant control device 242 also controls the throttle opening of the flow control valve 33 so that a predetermined amount of increased production nitrogen for sale is supplied to the nitrogen sales means 70 .
- the plant 6 When proceeding to step S228, the plant 6 operates the second manufacturing equipment 40 according to the control values of the second manufacturing equipment 40. That is, the plant control device 242 thus controls the operation of the nitrogen production device 15 and the throttle opening of each of the flow control valves 33 and 34 .
- the plant 6 of the present embodiment manufactures and sells nitrogen other than the amount supplied to the second manufacturing device 40 according to the situation such as the selling price of nitrogen and the operating capacity of the nitrogen manufacturing device 15. can be turned into That is, in this embodiment, it is possible to further improve the profit of the plant.
- control is performed based on the selling price (unit selling price).
- the selling price (unit selling price) here means the selling price (unit selling price) of the first product, the selling price (unit selling price) of the second product, and the nitrogen selling price (unit selling price of nitrogen), which is the selling price of nitrogen. , including the selling price of electricity (unit selling price).
- the plant control device 241 of each embodiment acquires information on these selling prices (unit selling prices) from an external device or the like via a communication line (Internet or the like).
- These selling prices (unit selling prices) may be, for example, transaction prices (selling prices) and quotes (buying quotes, etc.) of spot or futures in the market, or may be specified trading partners (for example, negotiated trading partners). may be the price (unit price) presented by Also, other prices (unit prices) for reference may be used.
- the present invention can be used in manufacturing plants that utilize variable renewable energy.
- the scope of application of the present invention is not limited to the range exemplified here.
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Abstract
Description
本実施形態をグリーンアンモニア製造ビジネスに適用する場合の概略は、次の通りである。即ち、グリーンアンモニア製造ビジネスは、メインプロダクトのグリーンアンモニアのほかに、水素の形態での販売や水素発電による電力売りも想定される。ここで、卸電力価格や製品(水素、アンモニアなどの物質)の価格は変動する。このような価格変動に依存して、水素等の物質の最適な用途(発電、水素出荷、貯蔵、アンモニア製造)や、ひいては最適なプラントの運転計画は変化する。本実施形態は、この運転計画を自動的に決定し、グリーンアンモニアビジネスの利益の増加を目指すものである。なお、言うまでもなく、本実施形態は、グリーンアンモニア製造ビジネス以外のビジネスにも適用可能である。
ケース1における基本的な考え方としては、まず第2製造物(例えば、アンモニア)の製造量を優先的に考慮し、その後、余っている第1製造物(例えば、水素)の用途の配分を考える。言い換えれば、ケース1では、第2製造装置の継続的運転を最優先目標とする。
ケース2における基本的な考え方としては、まず全体的に何を製造(もしくは発電)することが収益的に有利であるかを考慮し、その後、第2製造物を製造するためのロードの決定に反映させる。
ケース3においては、演算部202は、与えられる拘束条件下において、評価関数の値がよくなるように(あるいは最適になるように)、第2製造装置40への第1製造物の供給量と、発電装置50への第1製造物の供給量と、販売用手段60への第1製造物への供給量を、求める。
q1≧0,q2≧0,q3≧0 ・・・(1)
Smin≦q1+q2+q3≦Smax ・・・(2)
q2≧Lmin ・・・(3)
E=α1・q1+α2・q2+α3・q3
ここで、実施形態の変形例について説明する。図1に示したように、上記実施形態では、プラント1は、発電装置50と、販売用手段60との、両方を備えていた。変形例として、プラント1が、発電装置50と、販売用手段60との、少なくともいずれか一方のみを備えるようにしてもよい。なお、プラント1が備える、発電装置50と、販売用手段60との、少なくともいずれか一方を、第1製造物を供給する対象の設備として「供給対象設備」と呼ぶ場合がある。
E=α1・q1+α2・q2
E=α2・q2+α3・q3
次に、第2実施形態を説明する。なお、前実施形態において説明した事項についてはここでの説明を省略する場合がある。ここでは、本実施形態に特有の事項を中心に説明する。
この第2実施形態においても、プラント6が、発電装置50と販売用手段60との少なくともいずれか一方のみの供給対象設備を持つようにしてよい。演算部202は、プラント6がどの供給対象設備を持つかに応じて、第1価格と第3価格との少なくともいずれか一方を取得する。そして、演算部202は、取得した前記第1価格と前記第2価格と前記第3価格と前記第4価格との少なくともいずれかに基づいて、電力販売用設備への電力の供給量である販売用電力供給量を決定する。
次に、第3実施形態を説明する。なお、前実施形態までにおいて説明した事項についてはここでの説明を省略する場合がある。ここでは、本実施形態に特有の事項を中心に説明する。
2 電力供給装置
6,7 プラント
10 第1製造装置
15 窒素製造装置
20 貯蔵装置
30,31,32,33,34 流量制御弁
40 第2製造装置
50 発電装置
60 販売用手段
70 窒素販売用手段
101 電力分配装置
201 プラント制御装置
202 演算部
203 制御信号出力部
211 発電量データ供給部
216 発電シミュレーター
221 電力価格データ供給部
222 製造物価格データ供給部
226 価格データ予測モデル
228 貯蔵量データ取得部
229 供給量実績記憶部
230 パラメーター記憶部
241,242 プラント制御装置
Claims (14)
- 変動性再生可能エネルギーを用いて発電した電力を供給する電力供給装置から供給される電力を使用して第1製造物を製造する第1製造装置から、製造された第1製造物を、受け取って貯蔵する貯蔵装置と、
前記貯蔵装置から供給される前記第1製造物を使用して第2製造物を製造する第2製造装置と、
発電装置と販売用手段との少なくともいずれか一方の供給対象設備と、
を含んで構成されるプラント、を制御するためのプラント制御方法であって、
前記発電装置は、前記貯蔵装置から供給される前記第1製造物を使用して発電するものであり、
前記販売用手段は、前記貯蔵装置から供給される前記第1製造物を販売するために外部に供給する手段であり、
演算部は、前記第1製造物の販売単価である第1価格、前記第2製造物の販売単価である第2価格、および前記発電装置で発電される電力の販売単価である第3価格のうちの少なくともいずれか一つを取得し、
前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記第2製造装置への前記第1製造物の供給量である第2供給量を決定し、
前記プラントが前記販売用手段を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記販売用手段への前記第1製造物の供給量である第1供給量を決定し、
前記プラントが前記発電装置を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記発電装置への前記第1製造物の供給量である第3供給量を決定し、
決定された前記第2供給量で前記第1製造物が前記第2製造装置に供給され、前記プラントが前記販売用手段を含む場合には決定された前記第1供給量で前記第1製造物が前記販売用手段に供給され、前記プラントが前記発電装置を含む場合には決定された前記第3供給量で前記第1製造物が前記発電装置に供給される、ように制御信号出力部が制御信号を出力する、
プラント制御方法。 - 前記演算部が、まず前記第2供給量を決定し、その後、
前記プラントが前記販売用手段を含む場合には、前記演算部は、前記販売用手段に前記第1製造物を供給することを決定して、前記第1供給量を0より大きい値として決定し、
前記プラントが前記発電装置を含む場合には、前記演算部は、前記発電装置に前記第1製造物を供給することを決定して、前記第3供給量を0より大きい値として決定する、
請求項1に記載のプラント制御方法。 - 前記プラントが、前記販売用手段と前記発電装置とを含む、
請求項1に記載のプラント制御方法。 - 前記演算部が、まず前記第2供給量を決定し、その後、前記第1価格と前記第3価格との少なくともいずれかに基づいて、前記第1供給量よりも前記第3供給量を多くするか、前記第3供給量よりも前記第1供給量を多くするか、のいずれかを決定する、
請求項3に記載のプラント制御方法。 - 前記演算部は、前記第1供給量よりも前記第3供給量を多くする場合において前記第1供給量をゼロとし、または、前記第3供給量よりも前記第1供給量を多くする場合において前記第3供給量をゼロとする、
請求項4に記載のプラント制御方法。 - 前記第2価格が所定の基準値以上である場合には、前記演算部は、前記第2供給量を前記供給対象設備への前記第1製造物の供給量よりも多くする、
請求項1に記載のプラント制御方法。 - 前記第2価格が所定の基準値以上である場合には、前記演算部は、前記供給対象設備への前記第1製造物の供給量をゼロとする、
請求項6に記載のプラント制御方法。 - 前記演算部は、前記第1価格と前記第2価格と前記第3価格のうちの少なくとも2つが与えられたときに、与えられた拘束条件下で、前記第1供給量と前記第2供給量と前記第3供給量のうちの少なくとも2つによって定まる所定の評価関数値に基づいて、前記第2供給量と、前記供給対象設備への前記第1製造物の供給量とを求める、
請求項1に記載のプラント制御方法。 - 前記販売用手段は、前記第1製造物を貯蔵するためのタンクと、販売先の別のプラントへの配管と、輸送手段に積載するための配管と、のいずれかである、
請求項1から8までのいずれか一項に記載のプラント制御方法。 - 前記プラントは、
前記電力供給装置から供給される電力を、前記第1製造装置と、電力を販売するための電力販売用設備と、に分配する電力分配装置、
をさらに備え、
前記演算部は、前記電力供給装置から供給される電力の販売単価である第4価格を取得し、
前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格と前記第4価格との少なくともいずれかに基づいて、前記電力販売用設備への電力の供給量である販売用電力供給量を決定し、
前記制御信号出力部は、決定された販売用電力供給量で電力が前記電力分配装置から前記電力販売用設備へ供給されるように、制御信号を出力する、
請求項1から9までのいずれか一項に記載のプラント制御方法。 - 前記プラントは、
窒素を製造する窒素製造装置と、
前記窒素製造装置が製造した窒素を販売するために外部に供給する手段である窒素販売用手段と、
をさらに備え、
前記第1製造物は、水素であり、
前記第2製造物は、アンモニアであり、
前記第2製造装置は、前記第1製造物である水素と、前記窒素製造装置から供給される窒素とを使用して、前記第2製造物であるアンモニアを製造するものであり、
前記演算部は、窒素の販売価格である窒素販売価格を取得し、
前記演算部は、少なくとも前記窒素販売価格に基づいて、前記窒素販売用手段への窒素の供給量である販売用窒素供給量を決定し、
前記制御信号出力部は、決定された販売用窒素供給量で窒素が前記窒素製造装置から前記窒素販売用手段へ供給されるように、制御信号を出力する、
請求項1から10までのいずれか一項に記載のプラント制御方法。 - 変動性再生可能エネルギーを用いて発電した電力を供給する電力供給装置から供給される電力を使用して第1製造物を製造する第1製造装置から、製造された第1製造物を、受け取って貯蔵する貯蔵装置と、
前記貯蔵装置から供給される前記第1製造物を使用して第2製造物を製造する第2製造装置と、
発電装置と販売用手段との少なくともいずれか一方の供給対象設備と、
を含んで構成されるプラント、であって、
前記発電装置は、前記貯蔵装置から供給される前記第1製造物を使用して発電するものであり、
前記販売用手段は、前記貯蔵装置から供給される前記第1製造物を販売するために外部に供給する手段である、
プラントを制御するためのプラント制御装置であって、
演算部と、
制御信号出力部と、
を備え、
前記演算部は、前記第1製造物の販売単価である第1価格、前記第2製造物の販売単価である第2価格、および前記発電装置で発電される電力の販売単価である第3価格のうちの少なくともいずれか一つを取得し、
前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記第2製造装置への前記第1製造物の供給量である第2供給量を決定し、
前記プラントが前記販売用手段を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記販売用手段への前記第1製造物の供給量である第1供給量を決定し、
前記プラントが前記発電装置を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記発電装置への前記第1製造物の供給量である第3供給量を決定し、
決定された前記第2供給量で前記第1製造物が前記第2製造装置に供給され、前記プラントが前記販売用手段を含む場合には決定された前記第1供給量で前記第1製造物が前記販売用手段に供給され、前記プラントが前記発電装置を含む場合には決定された前記第3供給量で前記第1製造物が前記発電装置に供給される、ように、前記制御信号出力部は、制御信号を出力する、
プラント制御装置。 - コンピューターを、請求項12に記載のプラント制御装置、として機能させるためのプログラム。
- 変動性再生可能エネルギーを用いて発電した電力を供給する電力供給装置から供給される電力を使用して第1製造物を製造する第1製造装置から、製造された第1製造物を、受け取って貯蔵する貯蔵装置と、
前記貯蔵装置から供給される前記第1製造物を使用して第2製造物を製造する第2製造装置と、
発電装置と販売用手段との少なくともいずれか一方の供給対象装置と、
プラント制御装置と、
を含み、
前記発電装置は、前記貯蔵装置から供給される前記第1製造物を使用して発電するものであり、
前記販売用手段は、前記貯蔵装置から供給される前記第1製造物を販売するために外部に供給する手段であり、
前記プラント制御装置は、
演算部と、
制御信号出力部と、
を備え、
前記演算部は、前記第1製造物の販売単価である第1価格、前記第2製造物の販売単価である第2価格、および前記発電装置で発電される電力の販売単価である第3価格のうちの少なくともいずれか一つを取得し、
前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記第2製造装置への前記第1製造物の供給量である第2供給量を決定し、
前記プラントが前記販売用手段を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記販売用手段への前記第1製造物の供給量である第1供給量を決定し、
前記プラントが前記発電装置を含む場合には、前記演算部は、取得した前記第1価格と前記第2価格と前記第3価格との少なくともいずれかに基づいて、前記発電装置への前記第1製造物の供給量である第3供給量を決定し、
決定された前記第2供給量で前記第1製造物が前記第2製造装置に供給され、前記プラントが前記販売用手段を含む場合には決定された前記第1供給量で前記第1製造物が前記販売用手段に供給され、前記プラントが前記発電装置を含む場合には決定された前記第3供給量で前記第1製造物が前記発電装置に供給される、ように、前記制御信号出力部は、制御信号を出力する、
プラント。
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JP2002233053A (ja) | 2001-02-05 | 2002-08-16 | Hitachi Ltd | 蓄電システム及び方法 |
JP2005350299A (ja) * | 2004-06-10 | 2005-12-22 | Hitachi Ltd | 水素燃料製造システム,水素燃料製造方法および水素燃料製造プログラム |
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