JP7155689B2 - Power generation pattern generator and power generation pattern generation program - Google Patents

Description

The present invention relates to a power generation pattern generation device and a power generation pattern generation program for generating a power generation pattern in a hydroelectric power station.

The power generation plan in hydropower generation is prepared based on numerical values such as responsible discharge, reverse regulation reservoir water level constraint, reservoir inflow, and reservoir target water level. In addition, the power generation plan for hydroelectric power generation is prepared based on the unit price of thermal power generators and the rated operation of water turbines so as to reduce the overall cost of power generation by multiple power generation methods such as thermal power generation and hydroelectric power generation.

In an existing electric power company that has a power transmission and distribution department that conducts business related to the distribution of power such as power transmission and distribution, and a power generation department that carries out business related to power generation, along with the separation of power generation and power transmission. , the power generation department is in charge of creating the power generation plan for the next day, and the power transmission and distribution department is in charge of the power generation plan for the day.

Along with this unbundling of power transmission and distribution, the power transmission and distribution division will be independent from the power generation division (power generation company) as a power transmission and distribution company, and from a neutral standpoint, all electric power companies will be able to use the power transmission and distribution networks equally. There is a need. Therefore, accountability for registration of power generation plans increases.

On the other hand, the operating conditions of power generation facilities, such as dam water level operation width and river restrictions, differ from hydroelectric power plant to hydroelectric power plant. For this reason, conventionally, generation plans for hydroelectric power generation, which is the responsibility of the power transmission and distribution department, have been created by shift staff at the control center that controls the hydroelectric power station, based on their own experience and other factors. There are no uniform standards and methods of creation for each.

Specifically, as a technology related to the creation of a power generation plan, in the past, for example, a standard power generation pattern was selected from the inflow amount to the regulating reservoir on the previous day, corrected and corrected, and the water level pattern for the next day was predicted. There is a technology related to an output command device that obtains a power generation output value that causes the actual water level to follow the target water level using a water level pattern as a target value (see, for example, Patent Document 1 below).

In addition, as a related technology, specifically, in the past, for example, a membership function for inflow prediction based on the amount of shift to deal with natural factors such as long-term environmental changes in the dam water system and weather. Plan the water level and discharge amount based on the predicted inflow amount obtained by shifting and calculating, correct the planned discharge value based on the planned water level value and the measured water level value, and obtain the target discharge value. There is a technique related to a control device for an adjustment gate (see, for example, Patent Document 2 below).

In addition, as a related technology, specifically, conventionally, for example, while relaxing the variable of the start-stop state of the thermal power generator to a real number variable, using the time change of the start-stop state as a constraint condition, a quadratic programming problem or a linear There is a technology related to a supply capacity operation planning method that formulates a planning problem and calculates the variables of the start and stop state and the output of the supply capacity by quadratic programming or linear programming (for example, the following patent document 3).

JP-A-62-182902 JP-A-04-143801 Japanese Patent No. 4075872

However, the conventional techniques described in Patent Literature 1 and Patent Literature 2 described above all calculate the power generation pattern at a single power plant, and it is difficult to reduce costs by considering the power generation status of a plurality of power plants. There is a problem that it is difficult to generate a feasible power generation pattern.

In addition, the conventional technology described in the above-mentioned Patent Document 3 is a technology for creating a generator output operation plan that minimizes the power generation cost within the range of constraints for thermal power plants, pumped storage power plants, etc. However, there is a problem that it is difficult to minimize the difference from the existing plan by correcting the contents of the existing plan according to the inflow forecast and actual results.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power generation pattern generation device and a power generation pattern generation program capable of reducing the cost of power generation in order to solve the above-described problems of the prior art.

Another object of the present invention is to provide a power generation pattern generation device and a power generation pattern generation program capable of ensuring neutrality in power transmission and distribution in order to solve the above-described problems of the conventional technology.

In order to solve the above-described problems and achieve the object, a power generation pattern generation apparatus according to the present invention includes a power generation plan acquisition unit that acquires information on a power generation plan in a plan period for each power plant from a plurality of power plants; a power generation condition acquiring unit that acquires information on conditions for power generation for each hydroelectric power plant that performs hydroelectric power generation among the power plants, and information on the power generation plan acquired by the power generation plan acquiring unit and acquired by the power generation condition acquiring unit an operation time calculation unit that calculates the operable time for each hydroelectric power station in the plan period based on the information on the conditions for power generation that has been obtained; and a price acquisition unit that acquires information on the power trading price in the plan period. a power generation pattern generation unit for generating a power generation pattern for each of the hydroelectric power stations during the planning period based on the information on the operable time calculated by the operation time calculation unit and the power trading price acquired by the price acquisition unit; and

Further, in the power generation pattern generation device according to the present invention, in the above invention, the power generation condition acquisition unit acquires information regarding the conditions for the power generation at predetermined time intervals, and the operation time calculation unit acquires the power generation condition Based on the information acquired by the acquisition unit, when the latest power generation conditions acquired within the planning period have changed by a predetermined threshold or more from the previously acquired power generation conditions, the planning period recalculates for each hydroelectric power station the operable time in the remaining period after the time when the conditions related to the latest power generation are acquired, and the power generation pattern generation unit calculates the recalculated operable time and the A power generation pattern for each hydroelectric power plant in the remaining period is generated based on the information on the power transaction price acquired by the price acquisition unit.

Further, in the power generation pattern generation device according to the present invention, in the above invention, the operation time calculation unit determines that the latest power generation condition acquired within the planning period is the power generation at the time when the previous power generation pattern was generated. recalculate the operable time for each of the hydroelectric power plants in the remaining period after the time when the latest conditions for power generation in the plan period are acquired, It is characterized by

Further, in the power generation pattern generation device according to the present invention, in the above invention, the price acquisition unit acquires information on the power transaction price at predetermined intervals, and the operation time calculation unit obtains Based on the acquired information, if the latest power trading price acquired within the planning period fluctuates by a predetermined threshold or more from the previously acquired power trading price, the latest power trading price within the planning period The power generation pattern generation unit recalculates the operable time for the remaining period after the power trading price is acquired for each hydroelectric power plant, and the power generation pattern generation unit acquires the recalculated operable time and the price acquisition unit. generating a power generation pattern for each of the hydroelectric power plants in the remaining period based on information on the latest electricity trading price.

Further, in the power generation pattern generating device according to the present invention, in the above invention, the operation time calculation unit determines that the latest power trading price acquired within the planning period is the power trading price at the time when the previous power generation pattern was generated. When the price fluctuates by a predetermined threshold or more, recalculating the operable time for each of the hydroelectric power plants in the remaining period after the time when the latest electricity trading price is acquired in the planning period. and

Further, the power generation pattern generation device according to the present invention is characterized in that, in the above invention, an output unit for outputting the power generation pattern generated by the power generation pattern generation unit to a control computer device of the corresponding hydroelectric power plant. Characterized by

Further, the power generation pattern generation program according to the present invention causes a computer to acquire information on a power generation plan in a planning period for each power plant from a plurality of power plants, and for each hydroelectric power plant that performs hydroelectric power generation among the plurality of power plants acquire information on the conditions for power generation, calculate the operable time for each hydroelectric power station in the plan period based on the acquired information on the power generation plan and the information on the conditions for power generation, and Acquiring information on power trading prices, and generating a power generation pattern for each hydroelectric power plant in the planning period based on the calculated operable time and the acquired information on power trading prices. Characterized by

According to the power generation pattern generation device and the power generation pattern generation program according to the present invention, it is possible to reduce the cost of power generation.

Further, according to the power generation pattern generation device and the power generation pattern generation program according to the present invention, it is possible to ensure the neutrality of power transmission and distribution.

1 is an explanatory diagram showing a system configuration of a power generation pattern generation system including a power generation pattern generation device according to an embodiment of the present invention; FIG. It is an explanatory view showing an example of a schematic structure of a power generation system of a hydroelectric power plant. It is an explanatory view showing the hardware constitutions of a power generation pattern generation device. It is explanatory drawing which shows an example of an actual measurement information database. FIG. 4 is an explanatory diagram showing an example of a constraint information database; 2 is a block diagram showing a functional configuration of a power generation pattern generation device; FIG. 4 is a flow chart showing an example of a processing procedure of the power generation pattern generation device; 9 is a flowchart showing another example of the processing procedure of the power generation pattern generation device; FIG. 3 is an explanatory diagram (part 1) showing an operation example using the power generation pattern generation system; FIG. 2 is an explanatory diagram (part 2) showing an operation example using the power generation pattern generation system;

Exemplary embodiments of a power generation pattern generation device and a power generation pattern generation program according to the present invention will be described in detail below with reference to the accompanying drawings.

First, a system configuration of a power generation pattern generation system including a power generation pattern generation device according to an embodiment of the present invention will be described. FIG. 1 is an explanatory diagram showing the system configuration of a power generation pattern generation system provided with a power generation pattern generation device according to an embodiment of the present invention.

In FIG. 1 , the power generation pattern generation system 100 includes a control device 110 and a power generation pattern generation device 120 . The control device 110 and the power generation pattern generation device 120 can be implemented by, for example, a computer device such as a general-purpose personal computer or server computer (see FIG. 3).

The control device 110 is installed for each power plant (see FIG. 2). The control device 110 transmits to the power generation pattern generation device 120 the next day's power generation plan for the corresponding power plant. When one power company has a plurality of power plants, the control device 110 transmits a power generation plan for each power plant even for the same power company.

A power generation plan is created, for example, for each power plant, and indicates the power generation amount for each set time such as 30 minutes on the next day (for example, 24 hours from 00:00 to 24:00). A power generation plan is created, for example, by a staff member at a power plant by forecasting the power demand for the next day. Alternatively, the power generation plan may be created using a predetermined computer device without human intervention, for example.

The power generation pattern generation device 120 generates a power generation pattern for each power plant based on the next day's power generation plan transmitted from a plurality of power plants (see FIGS. 8A and 8B). In addition, the power generation pattern generation device 120 transmits the power generation pattern generated for each power plant to the control device 110 installed at the corresponding power plant.

The power generation pattern generation device 120 generates a power generation pattern for each power plant based on information on power trading prices disclosed by the wholesale power trading market exchanges operated by JEPX (Japan Electric Power Exchange). In addition, the power generation pattern generation device 120 generates a power generation pattern based on information regarding conditions for power generation acquired from the control device 110 installed at each hydroelectric power station. Conditions for power generation at hydroelectric power plants include, for example, the water level of each hydroelectric power plant dam, the amount of inflow into the dam, rainfall (weather), upper and lower water level restrictions, river inflow restrictions, power generation status, work restrictions, etc. .

Control device 110 and power generation pattern generation device 120 are communicably connected to each other via network 101 such as the Internet. Connected to the network 101 are a computer device 102 on which a WEB page where JEPX discloses electricity trading prices is opened, a management computer 103 of an electricity retailer, and the like.

(Example of schematic configuration of hydroelectric power plant system)
Next, an example of a schematic configuration of a power generation system of a hydroelectric power plant will be described. FIG. 2 is an explanatory diagram showing an example of a schematic configuration of a power generation system of a hydroelectric power plant. As shown in FIG. 2, a hydroelectric power plant power generation system 200 includes a first dam 201, a water intake facility 202, a water conveyance facility 203, an electrical facility 204, a second dam 205, a water discharge facility 206, and a control device 110 .

The first dam 201 stores water in the reservoir 201a to ensure the required amount. A water level measuring device 201b for measuring the water level of the reservoir 201a is installed in the reservoir 201a. The water level measuring device 201b outputs information about the measured water level of the reservoir 201a to the control device 110 . By measuring the water level of the reservoir 201a with the water level measuring device 201b, the amount of water stored in the reservoir 201a can be converted from the water level.

The water intake facility 202 has a water intake port 202a that communicates with the reservoir 201a and has an openable and closable water intake gate. By opening the water intake gate, the water intake facility 202 takes in water to be used for power generation from the water stored in the reservoir 201a through the water intake port 202a. The water conveyance facility 203 includes a water conduit 203a, a penstock 203b, a spillway (not shown), and the like. After stabilizing the amount of water in the water conduit 203a, the water conduit 203 flows down the water turbine provided in the electrical equipment 204 via the penstock 203b. The spillway discharges surplus water exceeding a certain amount in the reservoir 201a.

The electrical equipment 204 is provided in a building 204a of the hydroelectric power plant. The electric equipment 204 includes a water wheel, and the water wheel 204b is rotated by the energy obtained from the head when the water flows down the penstock 203b. Electricity generated by power generation is output to power transmission equipment (not shown).

In addition, the electric equipment 204 is designed to allow water to flow from the reservoir 201a to the reverse regulating reservoir 205a when the water level of the reverse regulating reservoir 205a drops so that the water level and the amount of water stored in the reverse regulating reservoir 205a fall within an appropriate range. When the water level of the reverse regulating reservoir 205a rises, the flow of water is stopped and power generation is stopped.

The second dam 205 is installed downstream of the first dam 201, and stores the water used for power generation in a reverse regulation reservoir 205a. A water level measuring device 205b similar to the water level measuring device 201b installed in the reservoir 201a is installed in the reverse regulation reservoir 205a. The water level measuring instrument 205b outputs information about the measured water level of the reverse regulation reservoir 205a to the control device 110 . By measuring the water level of the reverse regulation reservoir 205a with the water level measuring device 205b, the amount of water stored in the reverse regulation reservoir 205a can be converted from the water level.

The water discharge facility 206 is connected to the reverse regulation pond 205a and has a drain outlet 206b provided with an openable and closable drain gate 206a. The water discharge facility 206 includes a water discharge channel 206c that communicates with a water outlet 206b, and discharges the water used for power generation stored in the reverse regulation reservoir 205a to the downstream river 207 via the water discharge channel 206c. By discharging the water stored in the reverse regulation reservoir 205a into the downstream river 207, the flow rate of the downstream river 207 can be maintained in a predetermined state. The hydroelectric power generation system 200 may be equipped with a sand removal facility (not shown). The sand removal equipment precipitates earth and sand contained in the water taken from the water intake port 202a.

The control device 110 is provided in the building 204a of the hydroelectric power plant. The control device 110 controls the opening and closing of the water intake gate to operate or stop the operation of the electrical equipment 204 . The controller 110 also controls the opening and closing of the drain gate 206a to discharge or stop the discharge of the water stored in the reverse regulation reservoir 205a.

Further, the control device 110 calculates the amount of water stored in the reservoir 201a based on the water level of the reservoir 201a measured by the water level measuring device 201b. Further, the control device 110 calculates the amount of water stored in the reverse regulation pond 205a based on the water level of the reverse regulation pond 205a measured by the water level gauge. The control device 110 keeps the water level of the reverse regulation reservoir 205a, that is, the amount of water stored, within an appropriate range. When the water level of the pond 205a rises, the water intake gate is closed to stop power generation.

The control device 110 also calculates the amount of water flowing from the river into the reservoir 201a. The inflow can be obtained according to a water level-flow curve (HQ curve) based on the water level of the river measured by a measuring instrument installed at a standard flow gauging station installed in the river flowing into the reservoir 201a. The water level flow curve is a graphical representation of the relationship between the water level (Height) and the flow (Quantity) of a river during a period, and is indicated by a quadratic curve or the like. Since the inflow is affected by the runoff rate and rainfall distribution in the residual area between the reference flow gauging station and the reservoir 201a, it is appropriately corrected by the rate of temporal change in the water level of the reservoir 201a.

In FIG. 2, the power generation system 200 of a reservoir-type hydroelectric power plant has been described as an example. It is not limited. The power generation pattern generation device 120 according to the present invention is intended for generation of power generation patterns for power generation systems of various types of hydroelectric power plants such as regulating pond type and run-of-river type. Moreover, generation of a power generation pattern related to a power generation system of a hydroelectric power plant that generates power by combining a plurality of power generation methods can also be targeted.

(Hardware Configuration of Power Generation Pattern Generation Device 120)
Next, the hardware configuration of the power generation pattern generation device 120 will be described. FIG. 3 is an explanatory diagram showing the hardware configuration of the power generation pattern generation device 120. As shown in FIG. In FIG. 3 , the power generation pattern generation device 120 includes a CPU (Central Processing Unit) 301 , a memory 302 and a network I/F (InterFace) 303 . Each unit 301 to 303 included in the power generation pattern generation device 120 is connected by a bus 304, respectively.

The CPU 301 controls the entire power generation pattern generation device 120 . The memory 302 stores programs such as a boot program, data constituting various databases, and the like. The memory 302 also stores, for example, a power generation pattern generation program according to the embodiment of the invention. Further, specifically, the memory 302 stores various databases related to generation of power generation patterns, such as an actual measurement information database and a constraint information database (see FIGS. 4 and 5).

Also, the memory 302 is used as a work area for the CPU 301 . The memory 302 includes, for example, a ROM (Read-Only Memory), a RAM (Random Access Memory), an SSD (Solid State Drive) composed of a NAND memory and a NAND memory controller that controls the NAND memory, and a HDD (Hard Disc Drive). ) and the like.

Network I/F 303 is connected to network 101 such as the Internet, and controls the interface between the inside of power generation pattern generation device 120 and an external device. Specifically, the network I/F 303 is, for example, the inside of the power generation pattern generation device 120, the control device 110 installed for each power plant, and the computer device 102 where the WEB page where JEPX discloses the power trading price is opened. , controls the input and output of data between

The hardware configuration of control device 110 can be implemented by a computer device similar to the computer device that implements power generation pattern generation device 120 . The memory of the control device 110 stores an actual measurement information database and a constraint information database related to the power plant in which the control device 110 is installed (see FIGS. 4 and 5).

(Example of database)
Next, an example of the database included in the power generation pattern generation device 120 will be described. FIG. 4 is an explanatory diagram showing an example of the actual measurement information database. In FIG. 4, the actual measurement information database 400 stores actual measurement information for each power plant. The actual measurement information is information obtained by measurement or calculation based on the measured values, and is specifically realized by numerical values indicating, for example, dam water level, inflow amount, rainfall amount, river flow rate, power generation amount, and the like.

The actual measurement information may also include information about the weather around the power plant for each power plant. The weather around the power plant includes, for example, the weather for each river basin that flows into the reservoir 201a of each power plant, such as around a reference flow gauging station. The weather around the power plant may be the current weather or the forecast weather around the power plant and the reference flow gauging station. The current weather can be obtained, for example, from weather data distributed by the Japan Meteorological Agency. The predicted weather can be predicted based on weather data distributed by the Japan Meteorological Agency, for example.

The power generation pattern generation device 120 communicates with the control device 110 of each power plant when a predetermined timing arrives or at predetermined time intervals, and obtains actual measurement information stored in the actual measurement information database 400 by each control device 110. It acquires and updates the actual measurement information database 400 based on the acquired actual measurement information.

The predetermined time can be set, for example, to 30 minutes, which is the standard in the power generation plan. The predetermined time is not limited to 30 minutes, and may be 10 minutes, 1 hour, or a continuous period of time. The power generation pattern generation device 120 associates the acquired actual measurement information with the date and time when each item of actual measurement information was acquired, and accumulates and stores them in the actual measurement information database 400 .

The actual measurement information database 400 stores an expected total amount of water flowing into the reservoir 201a during the planning period, and a planned water amount indicating a planned value (target value) of the water amount of the reservoir 201a at the end of the planning period. For example, information calculated based on actual measurements may be stored. Information such as the expected total inflow amount and planned water storage amount may be obtained from the control device 110 of each power plant, and is calculated by the power generation pattern generation device 120 based on the actual measurement information obtained from the control device 110 of each power plant. can be anything.

The planning period can be arbitrarily set by the administrator of the power generation pattern generation device 120 or the like. Specifically, the planning period can be set, for example, as "every day, 24 hours from 0:00 to 24:00". In this way, by setting the reference period for generation of the power generation pattern by the power generation pattern generation device 120 to "every day, 24 hours from 0:00 to 24:00", the power generation company can generate power as usual. It is only necessary to register the plan, and it is possible to avoid increasing the burden on the power generation company.

FIG. 5 is an explanatory diagram showing an example of the constraint information database. In FIG. 5, the constraint information database 500 stores constraint information for each power plant. The restriction information is information indicating restrictions on power generation, and is specifically realized by information indicating, for example, water level upper limit restrictions, water level lower limit restrictions, river flow rate restrictions, work restrictions, and the like.

The water level upper limit restriction is defined by, for example, a flood season limit water level, a design flood level, a surcharge water level, a full water level, a preliminary discharge water level, and the like. The low water level constraint is defined by the lowest water level. Also, the river flow rate constraint is defined to make the flow rate of the downstream river 207 normal.

The normal discharge is the discharge necessary to maintain the normal function of the river, and indicates the discharge consisting of the maintenance discharge and the irrigation discharge. Specifically, the maintenance flow rate is determined in consideration of, for example, protection of animals and plants, fisheries, scenery, maintenance of clean running water, and the like. The water flow rate is determined in consideration of irrigation water and industrial water.

The work constraint is a work that affects power generation among the works in the power plant, and defines the contents of the work, the work date and time, and the period. Specifically, the work constraint indicates, for example, a period during which power cannot be generated due to inspection work.

The constraint information database 500 may further store the maximum output flow rate, maximum output power amount, and the like. The maximum output flow rate indicates the flow rate (amount of water flowing per unit time) required to operate the generator at maximum generated power. The maximum output power amount indicates the generated power amount when the generator is operated at the maximum generated power (specifically, the rated output) per unit time, that is, when the rated operation is performed. The power generation pattern generation device 120 may store the maximum output flow rate and the maximum output power amount obtained from each control device 110 installed for each power plant, and the maximum output flow rate and the maximum output power amount obtained by calculation in the own device. The amount of output power may be stored.

(Functional Configuration of Power Generation Pattern Generation Device 120)
Next, the functional configuration of the power generation pattern generation device 120 will be described. FIG. 6 is a block diagram showing the functional configuration of the power generation pattern generation device 120. As shown in FIG. 6, the functions of the power generation pattern generation device 120 are a power generation plan acquisition unit 601, a power generation condition acquisition unit 602, an operating time calculation unit 603, a price acquisition unit 604, a storage unit 605, and a power generation pattern generation unit 606. , and an output unit 607 .

The power generation plan acquisition unit 601 acquires information on the power generation plan in the planning period for each power plant from a plurality of power plants. As described above, the power generation plan is created for each power plant and registered in the control device 110 for each power plant. For example, the power generation plan acquisition unit 601 communicates with the control device 110 for each power plant every day at a predetermined time (for example, “9:00 am (09:00)”). , the next day's power generation plan registered in each control device 110 is acquired. Power generation plan acquisition unit 601 can be realized by, for example, CPU 301 , memory 302 and network I/F 303 provided in a computer that realizes power generation pattern generation device 120 .

The power generation condition acquisition unit 602 acquires information about conditions for power generation for each hydroelectric power plant that performs hydroelectric power generation among the plurality of power plants. For example, the power generation condition acquisition unit 602 communicates with the control device 110 of each power plant every day at a predetermined time (for example, “9:00 pm (21:00)”), and receives information from each control device 110 , the actual measurement information stored in the actual measurement information database 400 provided in each control device 110 and the constraint information stored in the constraint information database 500 are acquired as information on conditions for power generation.

Based on the measured information stored in the measured information database 400, the power generation condition acquisition unit 602 may calculate the predicted total amount of water flowing into the reservoir 201a during the planning period. The expected total inflow amount may be calculated in the control device 110 for each power plant, and the power generation condition acquisition unit 602 may acquire the expected total inflow amount calculated in each control device 110 .

In addition, the power generation condition acquisition unit 602 obtains the planned value (target value) of the water storage volume of the reservoir 201a at the end of the planning period based on the actual measurement information stored in the actual measurement information database 400 and the constraint information stored in the constraint information database 500. You may calculate the planned water storage amount to show. The planned water storage amount may be calculated by the control device 110 for each power plant, and the power generation condition acquisition unit 602 may acquire the planned water storage amount calculated by each control device 110 .

The power generation condition acquisition unit 602 acquires information on conditions for power generation at predetermined time intervals. Power generation condition acquisition unit 602 can be realized by, for example, CPU 301 , memory 302 and network I/F 303 provided in a computer that realizes power generation pattern generation device 120 .

The operation time calculation unit 603 calculates the operable time in the plan period based on the information on the power generation plan acquired by the power generation plan acquisition unit 601 and the information on the conditions for power generation acquired by the power generation condition acquisition unit 602. Calculate for each power plant. The operation time calculation unit 603 calculates the operable time that satisfies the restrictions defined by the constraint conditions, for example, based on the information acquired by the power generation condition acquisition unit 602, taking into consideration the information regarding the conditions for power generation.

For example, the operation time calculation unit 603 determines whether a hydroelectric power plant that has a high dam water level and can Calculate the operable time for each power plant so that power can be generated for each plant as well. Further, the operating time calculation unit 603 determines, for example, based on actual measurement information and constraint information about a plurality of power plants, a hydroelectric power plant that has a high dam water level and is capable of generating a large amount of power may The operable time for each power plant is calculated so that the hydroelectric power plant that cannot generate power can also generate power.

Based on the information acquired by the power generation condition acquisition unit 602 at predetermined time intervals, the operating time calculation unit 603 compares the latest power generation conditions acquired within the planning period with the previously acquired power generation conditions. On the other hand, if the fluctuation exceeds a predetermined threshold, the operable time for the remaining period after the time when the latest power generation conditions are acquired in the planning period is recalculated for each hydroelectric power plant. The operating time calculation unit 603 can be implemented by, for example, the CPU 301 and the memory 302 included in the computer that implements the power generation pattern generation device 120 .

The price acquisition unit 604 acquires information on the electricity transaction price during the planning period. The price acquisition unit 604, for example, every day at a predetermined time (for example, "9:00 pm (21:00)"), communicates that JEPX has opened a web page to disclose the electricity trading price, Information about the power trading price is acquired from the computer device 102 . Price acquisition unit 604 can be realized by, for example, CPU 301 , memory 302 and network I/F 303 included in a computer that realizes power generation pattern generation device 120 .

The storage unit 605 stores various types of information acquired by the power generation plan acquisition unit 601 , the power generation condition acquisition unit 602 and the price acquisition unit 604 . Specifically, the storage unit 605 stores an actual measurement information database 400 and a constraint information database 500 . The storage unit 605 can be implemented by, for example, the memory 302 included in the computer that implements the power generation pattern generation device 120 .

The power generation pattern generation unit 606 generates a power generation pattern for each hydroelectric power plant during the planning period based on the operable time calculated by the operation time calculation unit 603 and the information on the power trading price acquired by the price acquisition unit 604. Generate. The power generation pattern generation unit 606 generates, for example, a power generation pattern such that power is generated during times when the electricity trading price is as high as possible within the range of the operable time calculated by the operation time calculation unit 603 . The power generation pattern generator 606 can be implemented by, for example, the CPU 301 and the memory 302 included in the computer that implements the power generation pattern generator 120 .

The operating time calculation unit 603 determines that, when the latest power generation condition acquired within the planning period has changed by a predetermined threshold or more from the power generation condition at the time of generating the previous power generation pattern, the plan Recalculate the operable time for each hydroelectric power plant in the remaining period after the time when the latest power generation conditions are acquired in the period. As a result, for example, when the conditions for power generation fluctuate greatly, such as when the weather suddenly changes and the amount of water flowing into the reservoir 201a increases, power generation is stopped according to the power generation pattern generated by the power generation pattern generation unit 606. Even so, it is possible to switch to generate power according to a new power generation pattern in the remaining period.

In addition, the operation time calculation unit 603 determines that when the latest power trading price acquired within the planning period has changed by a predetermined threshold or more from the power trading price at the time of generating the previous power generation pattern, the plan Recalculate the operable time for each hydroelectric power plant in the remaining period after the time when the latest electricity trading price is obtained. As a result, for example, when the power trading price fluctuates significantly, even if power is being generated according to the power generation pattern generated by the power generation pattern generation unit 606, power generation can be performed according to the new power generation pattern during the remaining period. can be switched to

The output unit 607 outputs the power generation pattern generated by the power generation pattern generation unit 606 to the control device 110 of the corresponding power plant. Specifically, for example, the output unit 607 selects the power generation pattern of the A power plant (hydroelectric power plant) among the plurality of power generation patterns for each hydroelectric power plant generated by the power generation pattern generation unit 606. The power generation pattern of the B power plant (hydroelectric power plant) is output to the control device 110 installed in the B power plant.

The output unit 607 outputs the generated power generation pattern, for example, at a predetermined time such as 0:00 on the day of power generation according to the generated power generation pattern. Output unit 607 can be implemented by, for example, CPU 301 , memory 302 and network I/F 303 provided in a computer that implements power generation pattern generation device 120 .

(Example of processing procedure of power generation pattern generation device 120)
Next, an example of the processing procedure of the power generation pattern generation device 120 will be described. FIG. 7A is a flowchart showing an example of a processing procedure of the power generation pattern generation device 120. FIG. In the flowchart of FIG. 7A, first, the system waits until the next day's power generation plan acquisition timing arrives (step S711: No). The acquisition timing of the power generation plan for the next day can be set, for example, at 9:00 on the day before the generation of the power generation pattern.

In step S711, when the acquisition timing of the power generation plan has arrived (step S711: Yes), information on the next day's power generation plan is acquired from the control device 110 of each power plant (step S712). In step S712, information on the power generation plan registered in each control device 110 is acquired from each control device 110 installed in each power plant.

Next, it waits until the acquisition timing of the information regarding the conditions for power generation comes (step S713: No). The acquisition timing of the information on the conditions for power generation can be set, for example, at 21:00 on the day before the generation of the power generation pattern.

In step S713, if the timing for acquiring the conditions for power generation has arrived (step S713: Yes), information on the conditions for power generation is acquired (step S714). In step S714, from each control device 110 installed in each power plant, actual measurement information stored in the actual measurement information database 400 provided in each control device 110 and constraint information stored in the constraint information database 500 are transferred to power generation. Acquire as information on such conditions.

Then, based on the information on the power generation plan for the next day acquired in step S712 and the information on the conditions for power generation acquired in step S714, the operable time at each hydroelectric power station is calculated (step S715). In step S715, for example, the time during which the water turbine 204b provided in each hydroelectric power plant can perform rated operation is calculated.

Next, the power trading price is acquired (step S716). In step S716, for example, JEPX accesses a computer device on which a WEB page for disclosing power trading prices is opened, and acquires the latest power trading prices.

Then, based on the power trading price acquired in step S716 and the operable time at each hydroelectric power plant calculated in step S715, the operable time at each hydroelectric power plant in the planning period is adjusted (step S717 ). In step S717, for example, the operable time of each hydroelectric power plant is adjusted so that the power generation time period overlaps with the time period when the electricity trading price is high within the range of operable time in the planning period.

Then, a power generation pattern is generated based on the operable time at each power plant adjusted in step S717 (step S718). In step S718, for example, the operable time at each hydroelectric power plant is adjusted so that the time during which continuous rated operation can be performed at each hydroelectric power plant becomes longer.

After that, the power generation pattern for each power plant generated in step S718 is output to the control device 110 of the corresponding power plant (step S719), and the series of processing ends. In step S719, for example, among the plurality of power generation patterns for each hydroelectric power plant generated in step S718, the power generation pattern of A hydroelectric power plant is output to control device 110 installed in A power plant, and B The power generation pattern of the hydroelectric power plant is output to the control device 110 installed at the B power plant. As a result, the control device 110 installed in each power plant can operate the generator according to the power generation pattern output from the power generation pattern generation device 120 to its own device.

(Another example of the processing procedure of the power generation pattern generation device 120)
Next, another example of the processing procedure of the power generation pattern generation device 120 will be described. FIG. 7B is a flowchart showing another example of the processing procedure of the power generation pattern generation device 120. As shown in FIG.

In the flowchart of FIG. 7B, first, it is determined whether or not information regarding the conditions for power generation has been acquired during the planning period (step S721). In step S721, instead of the predetermined time for acquiring the information on the conditions for the next day's power generation, the information on the conditions for the power generation that is acquired every predetermined time, such as every 30 minutes, during the planning period is acquired. or not. In step S721, when the information regarding the conditions for power generation has not been acquired during the planning period (step S721: No), the process proceeds to step S723.

In step S721, if the information on the conditions for power generation during the planning period is acquired (step S721: Yes), the conditions for power generation at the time of generating the previous power generation pattern are changed to the conditions acquired in step S721: Yes It is determined whether or not the conditions for power generation have fluctuated by a predetermined threshold or more (step S722). In step S722, it is determined whether or not each piece of actual measurement information acquired from the control device 110 at predetermined time intervals has changed by a predetermined threshold or more, which is set in advance in consideration of the constraint information.

In step S722, if the power generation conditions have not fluctuated by a predetermined threshold value or more (step S722: No), it is determined whether or not information on the power trading price has been acquired (step S723). In step S723, it is determined whether or not the information on the power trading price, which is acquired at predetermined intervals, such as every 30 minutes, during the planning period, is acquired instead of the predetermined time at which the information on the power trading price on the next day is acquired. to judge whether In step S723, if the information on the power trading price has not been acquired (step S723: No), the process returns to step S721.

In step S723, if the information on the power trading price is acquired (step S723: Yes), the power trading price acquired in step S723: Yes is set to a predetermined A determination is made as to whether or not the variation has exceeded the threshold value (step S724). In step S724, it is determined whether or not the variation has exceeded a preset threshold value. In step S724, if the power generation conditions and the power trading price have not fluctuated by a predetermined threshold or more (step S724: No), the series of processes is terminated.

On the other hand, in step S724, if the power trading price fluctuates by a predetermined threshold or more (step S724: Yes), the operable time at each hydroelectric power plant is recalculated in consideration of the power trading price acquired in step S723: Yes. (step S725). In step S725, for example, within the planning period, during the remaining period after the acquisition of the power trading price that has fluctuated by a predetermined threshold or more, the water turbine 204b provided in each hydroelectric power plant Calculate the time during which the rated operation can be performed.

Then, based on the operable time recalculated in step S725, a power generation pattern is generated (step S726), and the generated power generation pattern is output to the control device 110 of the power plant (step S727). end the processing of

On the other hand, in step S722, if the power generation conditions fluctuate by a predetermined threshold or more (step S722: Yes), considering the power generation conditions acquired in step S721: Yes, the operable time at each hydroelectric power plant Recalculate (step S725). In this case, in step S725, for example, the water turbine 204b provided in each hydroelectric power plant may be operated at rated capacity during the remaining period after the acquisition of the conditions for power generation that fluctuates by a predetermined threshold or more within the planning period. Calculate the time available.

Then, similarly to the case where the operable time is recalculated according to fluctuations in the electricity trading price, a power generation pattern is generated based on the operable time recalculated in step S725 (step S726), and the generated power generation The pattern is output to the control device 110 of the power plant concerned (step S727), and the series of processing ends.

(Example of operation using power generation pattern generation system 100)
Next, an operation example using the power generation pattern generation system 100 will be described. 8A and 8B are explanatory diagrams showing an operation example using the power generation pattern generation system 100. FIG.

As shown in FIGS. 8A and 8B, conventionally, hydroelectric power generation is performed by referring to a thermal power operating cost curve (thermal power operating cost unit price curve) 801 that indicates changes in the unit cost of operating costs for thermal power generation for each hydroelectric power plant. A person on duty at a control station who controls the station independently generates power generation patterns 802 and 803 for each power station by performing calculations based on his or her own experience. For this reason, the standards and methods for generating power generation patterns differed for each control station and were not standardized.

On the other hand, by using the power generation pattern generation system 100 provided with the power generation pattern generation device 120, the conditions 804 and 805 related to power generation such as actual measurement information and constraint information of a plurality of power plants and the power trading price 806 are considered. Then, power generation can be performed in the power generation patterns 807 and 808 that maximize the power generation amount and power generation cost in the entirety of the plurality of power plants using the power generation pattern generation system 100 .

Specifically, by using the power generation pattern generation system 100, for example, as shown in FIG. It is possible to know the day before the power generation that the power generation will be restricted. As a result, the power generation patterns 807 and 808 can be adjusted so that the A power plant can also generate the power generated by the B power plant on the next day (○ month △ day).

Further, specifically, by using the power generation pattern generation system 100, for example, as shown in FIG. can be grasped on the day before power generation (○ month □ day). As a result, the power generation patterns 807 and 808 for the next day (○ month △ day) can be adjusted to a power generation pattern in which the A power plant can also generate the power generated by the B power plant. The power generation patterns 807 and 808 for the next day (○ month △ day) may be generated in consideration of the power generation patterns 807′ and 808′ of the day before the power generation (○ month □ day) and actual measurement information.

In the separation of power generation and power transmission, which separates the power transmission and distribution networks from the power generation facilities and makes them independent so that all electric power companies can use them equally, the power transmission and distribution department (power transmission and distribution company) , without becoming a part of the existing electric power company, a neutral position is required for a plurality of electric power companies such as existing electric power companies and power producers of specified scale (PPS: new electric power). Against this background, the power generation pattern generation device 120 collectively generates power generation patterns for a plurality of power plants, thereby ensuring the neutrality of the power transmission and distribution departments (power transmission and distribution companies) and promoting power liberalization. be able to.

As described above, the power generation pattern generation device 120 according to the embodiment of the present invention includes the power generation plan acquisition unit 601 that acquires information on the power generation plan in the planning period for each power plant from a plurality of power plants, and a plurality of power generation A power generation condition acquisition unit 602 that acquires information on conditions for power generation for each hydroelectric power station that performs hydroelectric power generation among hydroelectric power plants, Based on the information on the conditions for power generation, an operation time calculation unit 603 that calculates the operable time for each hydroelectric power plant during the planning period; a power generation pattern generation unit 606 that generates a power generation pattern for each hydroelectric power plant during the planning period based on information on the operable time calculated by the time calculation unit 603 and the power trading price acquired by the price acquisition unit 604; It is characterized by having

According to the power generation pattern generation device 120 of the embodiment according to the present invention, each hydroelectric power station can generate power according to a power generation pattern that takes into account the power transaction price. In addition, considering the power generation plans of a plurality of power plants, the power generation pattern generation device 120 collectively generates power generation patterns for each of the plurality of hydropower plants. A fair power generation pattern can be generated for each of a plurality of hydroelectric power plants, compared with the conventional method of generating a power generation pattern individually for each hydroelectric power plant. As a result, it is possible to promote the rated operation of the hydroelectric power generators at each of the hydroelectric power stations and reduce the cost of power generation.

In addition, since the power generation pattern can be generated without the need for the duty staff of the control station that controls the hydroelectric power plant to perform calculations, etc., it is possible to reduce the workload of the workers. Also by this, the cost reduction concerning electric power generation can be aimed at.

In addition, by considering generally disclosed power transaction prices instead of the thermal power operation cost curve 801 that can only be considered by power generation companies equipped with thermal power generation facilities, multiple power The power generation pattern can be generated from a position that is neutral to the company. As a result, the power transmission and distribution department, which will become independent as a power transmission and distribution company from the existing power company due to the unbundling of power generation and transmission, will be able to conduct power transmission and distribution operations (water system operation) from a neutral standpoint regardless of before or after the unbundling. Neutrality in power distribution can be ensured.

In addition, in the power generation pattern generation device 120 according to the embodiment of the present invention, the power generation condition acquisition unit 602 acquires information regarding the conditions for power generation at predetermined time intervals, and the operating time calculation unit 603 acquires the power generation condition acquisition unit 602, if the latest power generation conditions acquired within the planning period have changed by a predetermined threshold or more from the previously acquired power generation conditions, The operable time in the remaining period after the latest power generation conditions are acquired is recalculated for each hydroelectric power plant, and the power generation pattern generation unit 606 uses the recalculated operable time and price acquisition unit 604 It is characterized by generating a power generation pattern for each hydroelectric power plant in the remaining period based on the acquired information on the electricity trading price.

According to the power generation pattern generation device 120 of the embodiment according to the present invention, for example, when the conditions for power generation fluctuate due to the amount of rainfall, the amount of sunshine, the amount of water used in the downstream river 207, etc., the operable time can be recalculated to generate a power generation pattern for each hydroelectric power plant according to the post-change conditions. As a result, even if the conditions for power generation fluctuate, it is possible to generate a power generation pattern that can reduce the cost of power generation without having to regenerate the power generation pattern based on the experience of the person in charge.

Further, in the power generation pattern generation device 120 of the embodiment according to the present invention, the operation time calculation unit 603 determines that the latest power generation condition acquired within the planning period is the power generation at the time when the previous power generation pattern was generated. Characterized by recalculating the operable time for each hydroelectric power plant in the remaining period after the time when the latest power generation conditions are acquired in the plan period when the conditions change by a predetermined threshold or more. and

According to the power generation pattern generation device 120 of the embodiment according to the present invention, the operable time is recalculated only when the power generation conditions at the time of generating the previous power generation pattern have changed by a predetermined threshold or more. can generate new power generation patterns.

This makes it possible to avoid excessive changes in the power generation pattern on the day of power generation, even when generating power generation patterns based on information such as actual measurement information that changes from day to day for each power plant. Even if such conditions change, it is possible to generate a power generation pattern that can reduce the cost of power generation without regenerating the power generation pattern based on the experience of the person in charge.

Further, in the power generation pattern generation device 120 according to the embodiment of the present invention, the price acquisition unit 604 acquires information on the power transaction price at predetermined time intervals, and the operation time calculation unit 603 acquires the information by the price acquisition unit 604 Based on the information obtained, if the latest electricity trading price obtained within the planning period fluctuates by a predetermined threshold or more from the previously obtained electricity trading price, the latest electricity trading price during the planning period is obtained for each hydroelectric power plant, and the power generation pattern generation unit 606 recalculates the recalculated operable time and the latest power obtained by the price acquisition unit 604 It is characterized by generating a power generation pattern for each hydroelectric power plant in the remaining period based on information on transaction prices.

According to the power generation pattern generation device 120 of the embodiment according to the present invention, for example, when the power trading price fluctuates, the operable time is recalculated, A power generation pattern can be generated. As a result, even if the power trading price fluctuates, it is possible to generate a power generation pattern that can reduce the cost of power generation without the need for the review work of the person in charge.

Further, in the power generation pattern generation device 120 according to the embodiment of the present invention, the operation time calculation unit 603 determines that the latest power trading price acquired within the planning period is the power trading price at the time when the previous power generation pattern was generated. is characterized by recalculating the operable time for each hydroelectric power plant in the remaining period after the time when the latest electricity trading price is acquired in the planning period when the fluctuation exceeds a predetermined threshold.

According to the power generation pattern generating device 120 of the embodiment according to the present invention, the operable time is recalculated only when the power trading price at the time of generating the previous power generation pattern fluctuates by a predetermined threshold or more. , new power generation patterns can be generated. As a result, even when the power generation pattern is generated based on the power trading price, which changes every moment on the day of power generation, the power generation pattern is not excessively changed on the day of power generation, and when the power trading price fluctuates by a predetermined threshold or more, Only in this case, it is possible to generate a power generation pattern that can reduce the cost of power generation.

Further, the power generation pattern generation device 120 of the embodiment according to the present invention includes an output unit 607 that outputs the power generation pattern generated by the power generation pattern generation unit 606 to the control computer device of the corresponding hydroelectric power plant. Characterized by

According to the power generation pattern generation device 120 of the embodiment according to this invention, the generated power generation pattern can be output to the control computer device of the corresponding hydroelectric power plant without intervention of the operator. As a result, the generated power generation pattern can be accurately and quickly transmitted to the relevant hydroelectric power plant.

The power generation pattern generation method described in this embodiment can be realized by executing a prepared program on a computer such as a personal computer or a work station. This program is recorded on a computer-readable recording medium such as a hard disk, flexible disk, CD-ROM, MO, DVD, etc., and is executed by being read from the recording medium by a computer. Also, this program may be a transmission medium that can be distributed via a network such as the Internet.

INDUSTRIAL APPLICABILITY As described above, the power generation pattern generation device and the power generation pattern generation program according to the present invention are useful as a power generation pattern generation device and a power generation pattern generation program for generating a power generation pattern in a hydroelectric power station. suitable for a power generation pattern generation device and a power generation pattern generation program for generating a power generation pattern in

REFERENCE SIGNS LIST 100 power generation pattern generation system 110 control device 120 power generation pattern generation device 200 hydroelectric power plant power generation system 601 power generation plan acquisition unit 602 power generation condition acquisition unit 603 operating time calculation unit 604 price acquisition unit 605 storage unit 606 power generation pattern generation unit 607 output unit

Claims (7)

a power generation plan acquisition unit that acquires information on a power generation plan in a planning period for each power plant from a plurality of power plants;
a power generation condition acquisition unit that acquires information about conditions for power generation for each hydroelectric power station that performs hydroelectric power generation among the plurality of power stations;
Operation for calculating the operable time for each of the hydroelectric power stations during the planned period based on the information on the power generation plan acquired by the power generation plan acquisition unit and the information on the conditions for power generation acquired by the power generation condition acquisition unit. a time calculation unit;
a price acquisition unit that acquires information about the electricity transaction price in the plan period;
a power generation pattern generation unit that generates a power generation pattern for each of the hydroelectric power stations during the planning period based on information on the operable time calculated by the operation time calculation unit and the power trading price acquired by the price acquisition unit; ,
with
The power generation condition acquisition unit acquires information about the conditions for power generation at predetermined time intervals,
Based on the information acquired by the power generation condition acquisition unit, the operation time calculation unit determines that the latest power generation conditions acquired within the planning period are predetermined with respect to the previously acquired power generation conditions. recalculate the operable time for each of the hydroelectric power plants in the remaining period after the time when the latest power generation conditions are acquired in the planning period when the fluctuation exceeds the threshold;
The power generation pattern generation unit generates a power generation pattern for each hydroelectric power plant in the remaining period based on the recalculated operable time and the information on the power trading price acquired by the price acquisition unit. A power generation pattern generator characterized by: The operating time calculation unit determines that, when the latest power generation conditions acquired within the planned period have changed by a predetermined threshold or more from the power generation conditions at the time when the previous power generation pattern was generated, 2. The power generation pattern generation device according to claim 1 , wherein the operable time in the remaining period after the time when the latest power generation conditions are obtained is recalculated for each hydroelectric power station. 3. The power generation pattern generation device according to claim 1, further comprising an output unit for outputting the power generation pattern generated by said power generation pattern generation unit to a control computer device of said hydroelectric power plant. a power generation plan acquisition unit that acquires information on a power generation plan in a planning period for each power plant from a plurality of power plants;
a power generation condition acquisition unit that acquires information about conditions for power generation for each hydroelectric power station that performs hydroelectric power generation among the plurality of power stations;
Operation for calculating the operable time for each of the hydroelectric power stations during the planned period based on the information on the power generation plan acquired by the power generation plan acquisition unit and the information on the conditions for power generation acquired by the power generation condition acquisition unit. a time calculation unit;
a price acquisition unit that acquires information about the electricity transaction price in the plan period;
a power generation pattern generation unit that generates a power generation pattern for each of the hydroelectric power stations during the planning period based on information on the operable time calculated by the operation time calculation unit and the power trading price acquired by the price acquisition unit; ,
with
The price acquisition unit acquires information on the power trading price at predetermined time intervals,
Based on the information acquired by the price acquisition unit, the operating time calculation unit determines that the latest power transaction price acquired within the planning period has changed by a predetermined threshold or more from the previously acquired power transaction price. If so, recalculate the operable time for each hydroelectric power plant in the remaining period after the time when the latest electricity trading price is acquired in the planning period,
The power generation pattern generation unit generates a power generation pattern for each of the hydroelectric power plants in the remaining period based on the recalculated operable time and the latest power trading price information acquired by the price acquisition unit. A power generation pattern generation device characterized by: When the latest power trading price acquired within the planning period has changed by a predetermined threshold or more from the power trading price at the time when the previous power generation pattern was generated, the operating time calculation unit 5. The power generation pattern generation device according to claim 4, wherein the operable time in the remaining period after the latest power transaction price is acquired is recalculated for each hydroelectric power station. to the computer,
a first process of acquiring information on a power generation plan in a plan period for each power plant from a plurality of power plants;
a second process of acquiring information about conditions for power generation for each hydroelectric power plant that performs hydroelectric power generation among the plurality of power plants;
a third process of calculating an operable time for each hydroelectric power plant in the plan period based on the acquired information about the power generation plan and information about the conditions for power generation;
a fourth process for acquiring information on the electricity trading price in the planning period;
a fifth process of generating a power generation pattern for each of the hydroelectric power plants during the planning period based on the calculated operable time and the obtained information on the electricity trading price;
and _
The second process acquires information about the conditions for the power generation at predetermined time intervals,
In the third process, based on the information about the conditions for power generation acquired by the second process, the latest conditions for power generation acquired within the planning period are changed from the previously acquired power generation conditions. recalculate the operable time for each of the hydroelectric power stations in the remaining period after the time when the latest conditions for power generation in the planning period are obtained when the conditions change by a predetermined threshold or more,
The fifth process generates a power generation pattern for each hydroelectric power plant in the remaining period based on the recalculated operable time and the information on the power trading price acquired by the fourth process. A power generation pattern generation program characterized by: to the computer,
a first process of acquiring information on a power generation plan in a plan period for each power plant from a plurality of power plants;
a second process of acquiring information about conditions for power generation for each hydroelectric power plant that performs hydroelectric power generation among the plurality of power plants;
a third process of calculating an operable time for each hydroelectric power plant in the plan period based on the acquired information about the power generation plan and information about the conditions for power generation;
a fourth process for acquiring information on the electricity trading price in the planning period;
a fifth process of generating a power generation pattern for each of the hydroelectric power plants during the planning period based on the calculated operable time and the obtained information on the electricity trading price;
and _
The fourth process acquires information about the power trading price at predetermined time intervals,
In the third process, based on the information acquired in the fourth process, the latest power trading price acquired within the planning period is greater than or equal to a predetermined threshold value with respect to the previously acquired power trading price. When the price fluctuates, recalculate the operable time for each hydroelectric power plant in the remaining period after the time when the latest power trading price is acquired in the planning period,
The fifth process generates a power generation pattern for each hydroelectric power plant in the remaining period based on the recalculated operable time and information on the latest electricity trading price acquired by the fourth process. A power generation pattern generation program characterized by:

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