JP2018063546A - Power generation planning apparatus, power generation planning method and power generation planning program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation planning apparatus, a power generation planning method, and a power generation planning program capable of making a power generation plan taking into account matters related to fuel for power generation.SOLUTION: According to one embodiment, a power generation planning apparatus comprises a power generation information processing unit which calculates transition of an inventory amount of fuel at a plurality of fuel stations on the basis of data on a plurality of power generation facilities, data on the fuel stations supplying the fuel to the power generation facilities, data on a conduit supplying the fuel from the fuel stations to the power generation facilities, and data on a tanker entering the fuel stations. The apparatus further comprises a power generation plan output unit which outputs a power generation plan for the power generation facilities on the basis of the transition of the inventory amount of the fuel.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a power generation plan formulation device, a power generation plan formulation method, and a power generation plan formulation program.

  The “Reform Policy on Power System Reform”, approved by the Cabinet on April 2, 2013, further expands the operation of wide-area grids, fully liberalizes retail and power generation, and further increases the neutrality of the power transmission and distribution sector through legal separation. The overall picture of the reform that consists of the three stages of ensuring As a result, the general electric utilities was to legal separation of the power transmission and distribution division to prospect 2018 to 2020. Currently, the power generation amount of each power station of a general electric utility is in accordance with a power generation plan that is calculated based on the demand forecast by the central power supply command station under the jurisdiction of the power transmission and distribution department of each general electric utility. However, with the legal separation of the power transmission and distribution sector, power generation companies will need to make power generation plans based on demand from the retail sector.

  Examples of the fuel for the generator include oil such as petroleum, coal, LPG (liquefied petroleum gas), and LNG (liquefied natural gas). As for oil, there is a stockpile base for oil majors in the country, and the transport of oil to the tanks of each power plant is relatively short distance, so there is no need for a large pipeline. Coal is stored in a field area called coal yard near the power plant for both domestic and overseas coal. On the other hand, for LNG, it is necessary for the power generation company itself, not the oil major, to purchase it at the place of production, transport it, and store it in the country.

  However, in order to stockpile LNG, it is necessary to keep LNG cool, and a tank like a huge magic bottle is required. Thus, since expensive equipment such as a tank for keeping LNG at a low temperature is required for stocking LNG, it is not preferable from the viewpoint of economy to install a tank for each power plant. Therefore, a system has been adopted in which LNG bases for supplying LNG to a plurality of power plants are installed and the power plants are connected by pipelines.

  When supplying LNG to a large number of power plants, a method of sharing a supply amount by installing a plurality of LNG bases can be adopted. When there are a plurality of LNG bases, the reliability of LNG supply can be improved by connecting a pipeline called a transfer pipe between the LNG bases. In this case, when the LNG inventory of a certain LNG base is likely to become insufficient, the flexible supply from other LNG bases is performed via the transfer pipe. Therefore, the relationship between the LNG base and the power plant is not fixed, and each power plant can receive fuel from a plurality of LNG bases through the pipeline.

  Therefore, a generator using LNG as fuel is connected to a pipeline extending from a fuel base (LNG base) in a branch shape, and fuel is supplied from one fuel base to a plurality of generators. Each fuel base has an upper limit value and a lower limit value of the fuel inventory amount, and it is necessary to adjust the output of the generator so that the fuel inventory amount does not fall below the lower limit value.

  LNG ships regularly enter each fuel base to replenish fuel (LNG). At this time, it is necessary to consume the fuel in advance so that the sum of the fuel stock amount of the fuel base and the fuel acceptance amount from the LNG ship does not exceed the upper limit value of the fuel stock amount. Therefore, in accordance with the LNG consumption plan, a replenishment plan for replenishing LNG with a tanker (LNG ship) is important.

  Further, the flow rate of the fuel that can flow through the pipeline has an upper limit value and a lower limit value depending on the thickness of the pipe. When flowing LNG through the pipeline, it is necessary to vaporize LNG. Therefore, a vaporizer for vaporizing LNG is installed at the LNG base. There are several types of vaporizers. A typical example of a vaporizer is an open rack LNG vaporizer (ORV) that uses seawater to vaporize LNG. Since the vaporizer is regularly maintained, some of the plurality of vaporizers may be stopped for maintenance. Therefore, it is necessary to operate the generator taking into consideration that the amount of gas that can be supplied from the LNG base varies depending on the period.

  LNG vaporizes naturally, and this gas is called BOG (Boil of Gas). BOG is used as fuel in generators. However, since the gas obtained as BOG is mainly composed of methane and the calorific value is small, the generator for producing BOG is limited. In addition, since BOG is generated when a tanker enters the ship and unloads the LNG, the amount of BOG generated when entering the tanker must be factored into the power generation plan.

  When formulating a power generation plan, it is also desirable to consider the operating status of facilities such as generators.

  As an index indicating the operation status of the equipment, the operation rate of the equipment is often used. The operating rate is defined as the ratio of the difference between the period T1 and the equipment failure time T2 to the period T1 (operating rate = (T1-T2) / T1). When the equipment is a generator, the equipment utilization rate is used in addition to the operation rate. The facility utilization rate is defined as a ratio between the total power generation amount W1 during a certain period and the power generation amount W2 that can be generated when the generator is operated at the rated output during this period (equipment utilization rate = W1 / W2). ).

  There are two types of equipment usage rates: calendar day usage rates and removal suspension usage rates. In the calendar day utilization rate, a calendar period is used as the above period regardless of whether or not the generator is generating power. For example, a daily calendar day utilization rate means a facility utilization rate per 24 hours. On the other hand, in the removal / stop utilization rate, the period during which the generator generates power is used as the above period. For example, when the generator generates power for 18 hours in one day, the daily removal / stop utilization rate means the equipment utilization rate per 18 hours.

  In the calendar day utilization rate, the period during which the generator is stopped for inspection is counted as the denominator of the utilization rate, so the calendar day utilization rate throughout the year does not reach 100%. On the other hand, in the removal / stop utilization rate, only the period during which the generator is operating is counted as the denominator of the utilization rate, so the removal / stop utilization rate throughout the year can be 100%. The calendar day utilization rate and the removal suspension utilization rate may be calculated for a single generator or multiple generators.

  For example, when it is desired to promote or suppress the use of fuel, the amount of fuel used can be increased or decreased by increasing or decreasing the removal stop utilization rate of the generator. Further, when adjusting the load distribution of a plurality of generators, the distribution value of each generator can be changed by changing the value of the coefficient multiplied to the fuel unit price.

  Several methods are known for power generation control in consideration of the fuel inventory. For example, in order to keep the fuel inventory amount within the range between the upper limit value and the lower limit value, when operating the assigned output amount of the generator, the fuel price is changed to the virtual price, and the output amount is set at the virtual price. A method of calculating and repeating the price change and the output calculation until the fuel inventory amount falls within the above range is known. At this time, when performing power generation using a first fuel (such as LNG) whose acceptance amount is predetermined and power generation using a second fuel (such as oil) whose acceptance amount is not defined, When the fuel is limited, the power generation with the first fuel may share a part of the power generation with the second fuel.

Japanese Patent No. 4726724

  However, the conventional power generation method and power generation plan formulation method have the following problems.

  In the conventional power generation method, when the operation of the plurality of generator groups is sequentially within the restricted range, an error such as output is absorbed by the unrestricted generator. On the other hand, oil and LNG were used for power generation on the same scale, but in recent years, oil-fired power generators tend to be abolished from the viewpoint of aging and resource protection. The proportion of power generation is increasing. Therefore, if the number of unrestricted generators is decreasing and fuel use and fuel planning in LNG thermal power generation does not proceed properly, this should be backed up with other fuel type power generation (oil-fired power generation, etc.) Is getting harder. Therefore, unless appropriate consideration is given to LNG inventory, LNG vaporization capacity, LNG pipeline flow restriction, generator selection, etc., power generation may become impossible. As a result, the power demand cannot be satisfied and there is a possibility that a power supply failure or a power failure may occur.

  There is also known a method for calculating the load distribution of a plurality of generators by virtually changing the fuel cost of each generator (determining the fuel cost by multiplying the fuel unit price by a virtual coefficient). In this method, calculation is performed by changing the load distribution by making each generator look like a generator with good fuel consumption or a generator with poor fuel consumption, and this calculation is repeated until the calculation result falls within the constraint range. . However, in such repeated calculation based on experience and trial and error, it takes a long time to obtain a calculation result, and verification of the obtained calculation result takes a long time.

  The power generation plan is based on the future. Specifically, when formulating the next month's power generation plan, calculations are performed starting from several days to several tens of days ahead. For example, when calculating the fuel consumption amount for the next month, the fuel consumption amount for the next month can be calculated by converting the power generation amount for the next month into the fuel consumption amount. On the other hand, when calculating the inventory transition for the next month, the inventory transition for the next month cannot be calculated without an estimated value of the fuel inventory amount on the first day of the next month. In the conventional method, only an approximate inventory transition can be predicted by a process such as setting a tank middle point as a temporary starting point.

  Further, the upper limit level and the lower limit level of the fuel inventory amount in the fuel tank are fixed, and the fuel inventory amount needs to be within a range between the upper limit level and the lower limit level. In the conventional method, the transition of the landing fuel from the tanker that entered the ship and the used fuel paid out to the generator is managed within this range. However, there is a difference between the upper and lower limit levels of the actual fuel tank and the upper and lower limit levels for management, and the range between the upper and lower limit levels of the latter is within the range between the upper and lower limit levels of the former. Therefore, although the upper and lower limits for management can be changed somewhat, since they are generally fixed, there is a possibility that a power generation plan that lacks the flexibility in actual operation may be formulated.

  Moreover, in the conventional method, the facility utilization factor of the power generation plan is not set appropriately. Depending on the amount of fuel stock and the situation of the pipeline, there are cases where it is desired to promote or reduce the use of fuel by multiple generators. However, the fuel usage in these generators cannot be changed appropriately only by changing the coefficient of the fuel unit price or the target value of the facility utilization rate. For example, if the amount of power generated by LNG thermal power is reduced at the peak of power demand, the amount of power generated by other fuel types increases, which is not preferable. Conversely, when the number of generators of other fuel types is small, the amount of power generated by the LNG-fired power generator cannot be reduced, and there is a possibility that a plan cannot be made in the power generation plan formulation process.

  Accordingly, an object of an embodiment of the present invention is to provide a power generation plan formulation apparatus, a power generation plan formulation method, and a power generation plan formulation program that can formulate a power generation plan in consideration of matters relating to fuel for power generation.

  According to one embodiment, the power generation plan formulation device includes data on a plurality of power generation facilities, data on a plurality of fuel bases that supply fuel to the power generation facilities, and the fuel from the fuel bases to the power generation facilities. And a power generation information processing unit that calculates a change in the inventory amount of the fuel at the fuel base based on data on a conduit for supplying fuel and data on a tanker entering the fuel base. The apparatus further includes a power generation plan output unit that outputs a power generation plan for the power generation facility based on a change in the inventory amount of the fuel.

It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 1st Embodiment. It is the schematic diagram which showed the example of the LNG supply pipeline of 1st Embodiment. It is the schematic diagram which showed the example of the pipeline topology of 1st Embodiment. It is the figure which showed the example of vaporizer data, conduit | pipe data, and base data of 1st Embodiment. It is the figure which showed the example of the inspection schedule data of 1st Embodiment, ship entry schedule data, and base data. It is the graph which showed the specific example of transition of the fuel inventory amount in the electric power generation plan of 1st Embodiment. It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 2nd Embodiment. It is the figure which showed the example of the base data of 2nd Embodiment. It is the schematic diagram which showed the example of the LNG supply pipeline of 2nd Embodiment. It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 3rd Embodiment. It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 4th Embodiment. It is a graph for demonstrating the output correction of 4th Embodiment. It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 5th Embodiment. It is the graph which showed the specific example of transition of the fuel inventory amount in the electric power generation plan of 6th Embodiment. It is a block diagram which shows the structure of the power generation plan formulation apparatus of 6th Embodiment. It is a block diagram which shows the structure of the power generation plan formulation apparatus of 7th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 16, the same reference numerals are given to the same or similar configurations, and duplicate descriptions are omitted.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration of a power generation plan formulation device 10 according to the first embodiment. The power generation plan formulation device 10 formulates a power generation plan for when the generator is activated and how much power is generated. The generator of this embodiment is a generator of various power generation formats such as oil-fired power generation and LNG thermal power generation. A generator is an example of a power generation facility.

  The power generation plan formulation device 10 includes an equipment data input unit 11, a demand data input unit 12, an inspection schedule data input unit 13, a ship entry schedule data input unit 14, and an inventory amount data input unit 15. The power generation plan formulation device 10 further includes a load distribution calculation unit 21, a payout capacity calculation unit 22, a conduit flow rate calculation unit 23, a fuel inventory calculation unit 24, a constraint confirmation unit 25, and a previous formulation plan save, which are examples of a power generation information processing unit. A portion 26 is provided. The power generation plan formulation device 10 further includes a power generation plan output unit 31.

  The power generation plan formulation device 10 includes a vaporizer data storage unit 101, a generator data storage unit 102, a pipeline topology storage unit 103, a conduit data storage unit 104, a base data storage unit 105, and a demand data storage. Unit 106, planned inspection data storage unit 107, planned entry data storage unit 108, inventory data storage unit 109, load distribution transition storage unit 201, conduit flow rate transition storage unit 202, and fuel inventory transition storage unit 203. And a previous formulation plan storage unit 301.

  The data in the generator data storage unit 102 and the load distribution transition storage unit 201 is an example of data for a plurality of power generation facilities. The data in the carburetor data storage unit 101, the base data storage unit 105, the scheduled inspection data storage unit 107, and the inventory amount data storage unit 109 are examples of data for a plurality of fuel bases. The data in the pipeline topology storage unit 103, the conduit data storage unit 104, and the conduit flow rate transition storage unit 202 is an example of data about a conduit. The data in the entry schedule data storage unit 108 is an example of data on a tanker.

  Hereinafter, the operation of the power generation plan formulation device 10 of FIG. 1 will be described in detail. In this description, reference is made to FIGS.

  The facility data input unit 11 inputs data on various facilities to the power generation plan formulation device 10. Examples of such facilities are LNG supply pipelines, generators, fuel bases and the like.

  FIG. 2 is a schematic diagram illustrating an example of the LNG supply pipeline according to the first embodiment.

  The LNG supply pipeline shown in FIG. 2 is a conduit that connects the generators 1 to L and the fuel bases (LNG bases) 1 to N to each other, and generates fuel for power generation from the fuel bases 1 to N to the generators 1 to L. LNG is supplied. Hereinafter, the LNG supply pipeline is simply referred to as “pipeline”. FIG. 2 further shows vaporizers 1 to M provided on the pipeline for vaporizing LNG. L, M, and N are integers of 2 or more.

  The fuel base 1 includes carburetors 1 and 2. The fuel base 1 supplies the LNG vaporized by the vaporizer 1 to the generators 1 and 2 via the pipeline, and supplies the LNG vaporized by the vaporizer 2 to the generators 3 to 5 via the pipeline. . Similarly, the fuel base 2 includes a carburetor 3 and supplies the LNG vaporized by the carburetor 3 to the generators 6 to 10 through a pipeline. The generators 9 to 10 are normally supplied with LNG from the fuel base 2, but it is also possible to supply LNG directly from the pipeline of the fuel base 1 to the generators 9 to 10. Further, the fuel base N includes a carburetor M, and supplies the LNG vaporized by the carburetor M to the generator L via a pipeline.

  The generators 1 to 5 are normally supplied with LNG from the fuel base 1, but may be supplied with fuel from other fuel bases. For example, the generators 3 to 5 can be supplied with LNG from the fuel base 2 via the vaporizer 3 and a pipeline. Conversely, the generators 8 to 10 can be supplied with LNG from the fuel base 1 via the carburetor 2 and the pipeline. In these cases, LNG is transferred via a pipeline called a transfer pipe connecting between the fuel base 1 and the fuel base 2.

  Each of the fuel bases 1 to N includes a fuel tank for storing LNG. When a tanker (LNG ship) that transports LNG enters the fuel base 1, for example, the LNG transported by the tanker is stored in the fuel tank of the fuel base 1. As a result, the fuel inventory amount of the fuel base 1 increases.

  FIG. 3 is a schematic diagram illustrating an example of a pipeline topology according to the first embodiment.

  The connection state between the generators 1 to L and the fuel bases 1 to N by the pipeline is expressed by a pipeline topology as shown in FIG. A reference B01 indicates a base code of the fuel base 1. Reference numerals N01 to N04 indicate node codes for specifying each node on the pipeline. Reference numerals P01 to P10 denote conduit codes for specifying each part between nodes on a pipeline or between a node and equipment.

  FIG. 3 shows a mathematical formula called the fuel conservation law. For example, the expression “P04 = P05 + P06” of the node N02 indicates that the fuel flow rate in the conduit P04 is equal to the sum of the fuel flow rate in the conduit P05 and the fuel flow rate in the conduit P06. Further, the formula “B01 = P01 + P04” of the base B01 indicates that the amount of fuel discharged from the base B01 is equal to the sum of the fuel flow rate in the conduit P01 and the fuel flow rate in the conduit P04.

  In the following description, it is assumed that a power generation plan is formulated for the power generation system shown in FIGS. However, the notation of symbols shown in FIG. 2 and FIG. 3 such as the symbols “1 to L” of the generator and the symbols “1 to N” of the fuel base are omitted unless necessary. Note that the following description is also applicable when formulating a power generation plan for other power generation systems.

  The vaporizer data storage unit 101 in FIG. 1 stores the vaporizer data input from the equipment data input unit 11. The vaporizer data is data on the vaporizer shown in FIG. 2, for example, specification data representing specifications of each vaporizer. An example of the specification data is data representing the LNG vaporization capability of each vaporizer. The vaporizer data is used, for example, when the payout capacity calculation unit 22 determines the upper limit value of the LNG payout amount from each fuel base.

  The generator data storage unit 102 stores the generator data input from the facility data input unit 11. The generator data is data about the generator shown in FIG. 2, for example, specification data representing specifications of each generator. Examples of this specification data are data representing the rated output, efficiency, fuel cost, start / stop curve, etc. of each generator. The generator data is used, for example, when the load distribution calculation unit 21 determines the output amount of the generator in order to perform load distribution of the generator.

  The pipeline topology storage unit 103 stores the pipeline topology data input from the facility data input unit 11. The pipeline topology data is data regarding the pipeline topology shown in FIG. 3, and is data representing the connection state between the generator and the fuel base. Pipeline topology data further includes data relating to pipeline branches called nodes and data relating to the flow direction of LNG in each conduit to which a conduit code is attached. Pipeline topology data is used, for example, when the conduit flow rate calculation unit 23 takes into account conduit constraints.

  The conduit data storage unit 104 stores the conduit data input from the facility data input unit 11. The conduit data is data on the pipeline (conduit) shown in FIG. 2, and is, for example, spec data representing the specifications of the pipeline. An example of the specification data is data representing the diameter of each conduit to which a conduit code is attached. The conduit data is used, for example, when the conduit flow rate calculation unit 23 takes into consideration the conduit constraints, and specifically, used when determining the upper limit value of the LNG flow rate in each conduit.

  The base data storage unit 105 stores the base data input from the facility data input unit 11. The base data is data for the fuel base shown in FIG. 2, for example, spec data representing the specifications of each fuel base. An example of the specification data is data representing the size of the fuel tank of each fuel base. The fuel data is used, for example, when the fuel stock calculation unit 24 takes into account fuel stock constraints, and specifically, used when determining the fuel stock amount of each nuclear fuel base.

  FIG. 4 is a diagram illustrating an example of vaporizer data, conduit data, and base data according to the first embodiment.

  FIG. 4A shows an example of vaporizer data stored in the vaporizer data storage unit 101. In this embodiment, a parameter can be set for each vaporizer, and the vaporizer ID is an ID indicating a vaporizer for which a parameter is set. The vaporizer name indicates the name of the vaporizer for which the parameter is set. The conduit cord is a cord indicating a conduit provided with a vaporizer. The conduit name indicates the name of the conduit provided with the vaporizer. The maximum discharge amount is the maximum vaporization amount of the carburetor, and is the maximum fuel discharge amount of the conduit provided with the carburetor.

  FIG. 4B shows an example of conduit data stored in the conduit data storage unit 104. In this embodiment, a parameter can be set for each conduit, and the conduit ID is an ID indicating the conduit in which the parameter is set. The conduit name indicates the name of the conduit in which the parameter is set. The conduit code is a code indicating each conduit in the pipeline topology. According to the specifications of each conduit, an upper limit value and a lower limit value of the fuel flow rate in each conduit are set.

  FIG. 4C shows an example of base data stored in the base data storage unit 105. In this embodiment, a parameter can be set for each fuel base, and the base ID is an ID indicating a fuel base for which the parameter is set. The base name indicates the name of the fuel base for which the parameter is set. The base code is a code indicating each fuel base in the pipeline topology. According to the specifications of each fuel base, an upper limit value and a lower limit value of the fuel inventory amount at each fuel base are set.

  The demand data storage unit 106 stores the demand data input to the power generation plan formulation device 10 by the demand data input unit 12. The demand data is time-series data representing the power demand committed by the power generation company with other companies such as retail companies and the power market. The demand power calculated from the demand data is also the supply power that should be satisfied by the generator for which the power generation plan is formulated.

  The inspection schedule data storage unit 107 stores the inspection schedule data input to the power generation plan formulation device 10 by the inspection schedule data input unit 13. The inspection schedule data is data on the inspection schedule of the carburetor shown in FIG. 2, and defines, for example, a schedule of operation states such as stoppage of each carburetor and operation restrictions accompanying the inspection of each carburetor. The scheduled inspection data is used, for example, when the maximum payout amount set in the vaporizer data storage unit 101 is changed for a certain period.

  The entry schedule data storage unit 108 stores the entry schedule data input to the power generation plan formulation device 10 by the entry schedule data input unit 14. The entry schedule data is data on the LNG ship entering the fuel base shown in FIG. 2, and for example, defines the date and time when the LNG ship enters and the amount of LNG received when the LNG ship enters.

  The inventory quantity data storage unit 109 stores the inventory quantity data input to the power generation plan formulation device 10 by the inventory quantity data input unit 15. The inventory amount data is data regarding the fuel inventory amount of the fuel base shown in FIG. 2, for example, data for calculating the transition of the fuel inventory amount of each fuel base and the initial inventory amount. The inventory amount data of this embodiment can be arbitrarily set for each fuel base.

  FIG. 5 is a diagram illustrating an example of inspection schedule data, ship entry schedule data, and base data according to the first embodiment.

  FIG. 5A shows an example of inspection schedule data stored in the inspection schedule data storage unit 107. In this embodiment, a parameter can be set for each vaporizer, and the vaporizer ID is an ID indicating a vaporizer for which a parameter is set. The payout capability calculation unit 22 sets the changed payout amount as the maximum payout amount of the vaporizer, and sets the start date / time (From) and end date / time (To) of the change, so that the maximum payout amount of the vaporizer Can be changed for a certain period of time.

  FIG. 5B shows an example of ship entry schedule data stored in the ship entry schedule data storage unit 108. In this embodiment, a parameter can be set for each LNG ship, and the ship entry ID is an ID indicating the LNG ship for which the parameter is set. The base ID is an ID indicating a fuel base to which the LNG ship supplies LNG. The entry date indicates the date when the LNG ship enters the fuel base, and the fuel stock amount of the fuel base increases by the amount set as the acceptance amount on the arrival date.

  FIG. 5C shows an example of base data stored in the base data storage unit 105 when the stock upper and lower limits are changed only for a certain period when the LNG ship entry interval becomes long. In this case, the upper limit value and / or the lower limit value of the fuel inventory amount can be changed, and the start date / time (From) and end date / time (To) of the change can be set.

  The load distribution calculation unit 21 calculates the load distribution of the plurality of generators, and outputs the calculation result of the load distribution transition to the load distribution transition storage unit 201. Specifically, the load distribution calculation unit 21 selects the generator data arbitrarily selected from the generator data storage unit 102 and the demand data arbitrarily selected from the demand data storage unit 106. Calculate the load distribution. At this time, the load distribution calculation unit 21 formulates an operation plan in which the total cost of fuel consumed by these generators is the lowest without taking into consideration restrictions on the fuel flow rate of the conduit and the fuel stock amount of the fuel base. The load distribution transition in the operation plan is output to the load distribution transition storage unit 201.

  The payout capacity calculator 22 calculates the fuel (LNG) payout capacity from a plurality of fuel bases based on the vaporization capacity of the carburetors in these fuel bases. Specifically, the payout capacity calculation unit 22 generates a power generation plan based on vaporizer data arbitrarily selected from the vaporizer data storage unit 101 and inspection schedule data arbitrarily selected from the inspection schedule data storage unit 107. Calculate the payout capacity of each fuel base during the development period. At this time, the payout capacity calculation unit 22 acquires the maximum payout amount of each vaporizer from the vaporizer data, and changes the maximum payout amount of each vaporizer to the payout amount indicated in the inspection scheduled data for the period indicated in the inspection planned data. Then, the payout capacity of each fuel base is calculated based on the changed payout amount.

  The conduit flow rate calculation unit 23 calculates the flow rate of fuel in the pipeline (conduit) based on the load distribution calculated by the load distribution calculation unit 21 and the dispensing capacity calculated by the dispensing capacity calculation unit 22. Is output to the conduit flow rate transition storage unit 202. Specifically, the conduit flow rate calculation unit 23 selects the pipeline topology data arbitrarily selected from the pipeline topology storage unit 103, the conduit data arbitrarily selected from the conduit data storage unit 104, and the fuel from each fuel base. Based on the delivery capacity, the flow rate of fuel flowing through each conduit in the pipeline topology is calculated. At this time, the conduit flow rate calculation unit 23 calculates the flow rate transition necessary for obtaining the load distribution transition.

  The fuel inventory calculation unit 24 calculates the transition of the fuel inventory amount at a plurality of fuel bases based on the fuel flow rate calculated by the conduit flow rate calculation unit 23. Specifically, the fuel inventory calculation unit 24 selects the base data arbitrarily selected from the base data storage unit 105, the ship arrival schedule data arbitrarily selected from the vessel entry schedule data storage unit 108, and the inventory amount data input unit 109. Based on the inventory quantity data selected for, evaluate the influence of the flow rate of pipes and the amount of incoming vessels on the fuel inventory quantity of these fuel bases, and calculate the transition of the fuel inventory quantity at each fuel base based on the evaluation results . The calculation result of the change in the fuel inventory amount is output to the fuel inventory change storage unit 203.

  The constraint confirmation unit 25 confirms whether or not the transition of the fuel inventory amount calculated by the fuel inventory calculation unit 24 satisfies the constraints on the conduit flow rate and the fuel base. When it is determined that the transition of the fuel inventory amount does not satisfy these constraints (that is, the constraint is violated), the constraint checking unit 25 adjusts the target value of the fuel consumption of the fuel base, The load distribution calculation unit 21 is requested to recalculate the load distribution. In this case, the recalculation may be executed automatically in the system, or a man-machine operation based on user judgment is possible. The load distribution calculation unit 21 recalculates the load distribution so that the constraint violation is resolved with the minimum change amount, and the conduit flow rate calculation unit 23, the fuel inventory calculation unit 24, and the like based on the recalculation result of the load distribution, Calculation and confirmation by the constraint confirmation unit 25 are performed again. On the other hand, when the constraint checking unit 25 determines that the change in the fuel inventory amount satisfies these constraints (that is, does not violate the constraint), the power generation plan reflecting the change in the fuel inventory amount Is output to the previously established plan storage unit 26 and the power generation plan output unit 31.

  In this way, the power generation plans for the plurality of generators are output to the previous formulation plan storage unit 26 and the power generation plan output unit 31. This power generation plan defines the operation of these generators and the operation of a plurality of fuel bases that supply fuel to these generators. When this power generation plan is implemented, the operation of the power generation system is controlled so that the fuel stock amount of these fuel bases changes as calculated by the fuel stock calculation unit 24.

  The power generation plan output unit 31 outputs this power generation plan to the outside. For example, the power generation plan output unit 31 may output the power generation plan on a screen, store it in a recording medium or a recording device, or transmit it to another device via a network or a cable. On the other hand, the last-established plan storage unit 26 stores and saves this power generation plan as a previous-established plan in the previous-established plan storage unit 301 in the power generation plan-developing apparatus 10.

  FIG. 6 is a graph showing a specific example of the transition of the fuel inventory amount in the power generation plan of the first embodiment.

  FIG. 6A shows an example of the transition of the fuel inventory amount in the power generation plan output from the power generation plan output unit 31. The horizontal axis represents the time from the beginning of the planning period to the end of the planning period. The vertical axis represents the fuel inventory amount at the fuel base 1. Entry 1, 2, and 3 indicate the timing when the LNG ship enters the fuel base 1.

  A dashed line in FIG. 6A indicates the upper limit value and the lower limit value of the fuel stock amount of the fuel base 1. The upper limit value and the lower limit value of the fuel inventory amount are determined based on, for example, the size of the fuel tank. Hereinafter, these are referred to as the upper limit of inventory quantity and the lower limit of inventory quantity. The solid line in FIG. 6A shows the transition of the fuel inventory amount of the fuel base 1, and this is called the inventory quantity planning line. The broken lines in FIG. 6A indicate the upper limit value and the lower limit value of the inventory plan line of the fuel base 1. Hereinafter, these will be referred to as an inventory plan line upper limit and an inventory plan line lower limit.

  The fuel inventory quantity (stock quantity planning line) at the beginning of the planning period is the initial inventory quantity of the fuel base 1. The stock quantity planning line upper limit line and the stock quantity planning line lower limit line from the beginning of the planning period to entry 1 are drawn according to the timing of entry 1 with the initial inventory quantity as the starting point. The stock amount plan line lower limit line is drawn so that the fuel stock amount at the time of entering the ship 1 becomes the stock amount lower limit. The stock amount plan line upper limit line is drawn so that the sum of the fuel stock amount and the fuel acceptance amount at the time of entering the ship 1 becomes the stock amount upper limit. In the period from the beginning of the planning period to the arrival of ship 1, if the inventory plan line is drawn so that it falls within the upper limit line of the inventory plan line and the lower limit line of the inventory plan line, the change in fuel inventory during this period Satisfies the above constraints. On the other hand, if the inventory plan line for this period is drawn so that it does not fall between the upper limit line for the inventory plan line and the lower limit line for the inventory plan line, the transition of the fuel inventory amount for this period will be subject to the above constraints. Violation.

  The same applies to other periods from the beginning of the planning period to the end of the calculation period. The inventory plan line upper limit line from entry 1 to entry 2 is drawn in accordance with the timing of entry 2 with the upper limit of inventory quantity at entry 1 as the starting point. On the other hand, the lower limit line of the inventory amount plan line from entry 1 to entry 2 is drawn in accordance with the timing of entry 2 with the sum of the inventory amount lower limit and the fuel acceptance amount at the time of entry 1 as the starting point. The fuel inventory amount at the time of entering the ship 1 is increased by the amount of fuel received. If the inventory plan line is drawn between the upper limit line of the inventory plan line and the lower limit line of the inventory plan line during the period from the first entry to the second entry, this period is sure to As a result, it is possible to consume the fuel below the lower limit by relaxing the normal lower limit of inventory in anticipation of being accepted.

  It should be noted that the amount of fuel received is different between the incoming vessels 1, 2 and 3. The amount of fuel received when entering these ships depends on the amount of fuel transported by each LNG ship.

  FIG. 6B shows another example of the transition of the fuel inventory amount in the power generation plan output from the power generation plan output unit 31. When the LNG ship entry interval is long, the upper and lower limits of the inventory amount can be changed only for a certain period (see FIG. 5C). In this case, the upper limit of inventory quantity and / or the lower limit of inventory quantity can be changed, and the start date / time (From) and end date / time (To) of this change can be set. FIG. 6B shows an example in which the lower stock limit for the period from entry 2 to entry 3 is reduced. Thereby, the fuel consumption during this period can be reduced.

  As described above, the power generation plan formulation device 10 of the present embodiment relates to data on a plurality of generators, data on a plurality of fuel bases, and conduits that supply fuel to these generators from these fuel bases. And the data on the tankers entering the fuel bases, the transition of the fuel inventory at each fuel base is calculated. Therefore, according to the present embodiment, it is possible to formulate a power generation plan by appropriately taking into account fuel-related items such as fuel base inventory, fuel base carburetor, fuel transfer, tanker entry, etc. It becomes possible.

  Moreover, in this embodiment, the lineup which satisfies a restriction | limiting can be comprised by optimizing distribution of the electric power generation amount between the generators which use LNG as a fuel. Therefore, according to the present embodiment, it is possible to realize a power generation system that is less dependent on power generation of other fuel types or other unconstrained generators.

  Further, in the present embodiment, a power generation plan can be formulated based on the most economical operation plan that does not consider restrictions. Here, when the power generation plan does not satisfy the constraint, the load distribution calculation unit 21 may change the operation plan, or the constraint may be changed. For example, it is conceivable to change the fuel base into which the LNG ship enters, or to change the inspection time of the carburetor. This is useful when applied to medium- to long-term power generation plans. Further, the power generation plan can be formulated in cooperation with a LNG ship allocation plan, an equipment inspection plan, and the like, thereby realizing more economical power generation.

(Second Embodiment)
FIG. 7 is a block diagram showing the configuration of the power generation plan formulation device 10 of the second embodiment.

  The power generation plan formulation device 10 in FIG. 7 includes a BOG (Boil of Gas) calculation unit 27 in addition to the components shown in FIG.

  The BOG calculation unit 27 calculates the amount of BOG generated by natural vaporization from LNG. In this embodiment, the base data storage unit 105 stores the amount of BOG generated from the LNG of each fuel base as base data, and the ship entry plan data storage unit 108 uses the ship entry plan data as a ship entry plan data when the LNG ship enters the ship. The amount of generated BOG is stored. The BOG calculation unit 27 acquires the former BOG amount from the base data storage unit 105, acquires the latter BOG amount from the ship entry scheduled data storage unit 108, and adds these BOG amounts. Thereby, the BOG calculation unit 27 calculates the BOG amount in the period for formulating the power generation plan, and outputs this BOG amount to the conduit flow rate calculation unit 23.

  The conduit flow rate calculation unit 23 calculates the pipeline based on the load distribution calculated by the load distribution calculation unit 21, the payout capacity calculated by the payout capacity calculation unit 22, and the BOG amount calculated by the BOG calculation unit 27. Calculate the flow rate of LNG in (conduit). Specifically, the amount of BOG is set so that it can be reliably consumed as the minimum flow rate of the conduit.

  FIG. 8 is a diagram illustrating an example of base data according to the second embodiment.

  This base data includes the BOG amount of each fuel base in addition to the base data items shown in FIG. This BOG amount is read by the BOG calculation unit 27 and added to the BOG amount of the scheduled entry data.

  FIG. 9 is a schematic diagram illustrating an example of the LNG supply pipeline according to the second embodiment.

  In addition to the conduit shown in FIG. 2, the LNG supply pipeline shown in FIG. 9 is added with a line connected to the conduit shown in FIG. 2 after being boosted by a BOG compressor for processing BOG generated from each fuel base. ing. Since the calorific value is different between the gas obtained by vaporizing LNG with a vaporizer and the gas obtained from LNG as BOG, the number of generators that can produce BOG is limited, and therefore the connection destination conduits are limited. BOG is supplied from a fuel base to a generator that produces BOG via a connected conduit.

  According to the present embodiment, it is possible to formulate a more accurate power generation plan in consideration of the amount of BOG generated from LNG.

(Third embodiment)
FIG. 10 is a block diagram illustrating a configuration of the power generation plan formulation device 10 of the third embodiment.

  10 includes a comparison / selection unit 28 in addition to the components shown in FIG.

  As described above, the constraint confirmation unit 25 confirms whether or not the transition of the fuel inventory amount calculated by the fuel inventory calculation unit 24 satisfies the constraints on the conduit flow rate and the fuel base. Here, when these restrictions are taken into consideration (when constrained) and when they are ignored (when unconstrained), the power generation situation such as the cost of power generation changes. Similarly, even when these constraints change, the power generation status changes, such as the cost of power generation and the degree of constraint violation.

  Therefore, the comparison / selection unit 28 compares the difference in power generation status due to the difference in these restrictions, and displays the comparison result on the screen of the power generation plan formulation device 10. For example, the cost difference between the restriction time and the non-restriction time, or the difference in the degree of constraint violation between one restriction time and another restriction time is displayed. Furthermore, a power generation plan at the time of restriction and a power generation plan at the time of restriction may be displayed, or a power generation plan at a time of restriction and another power generation plan at the time of restriction may be displayed.

  The user of the power generation plan formulation device 10 can select on the screen whether the constraint should be considered or ignored or which constraint should be adopted. When the user performs an input operation related to this selection on the screen, the comparison / selection unit 28 outputs a selection instruction for selecting a predetermined power generation plan in accordance with the input information from the screen. For example, when the user performs an input operation in consideration of constraints, a selection instruction for selecting a power generation plan formulated in consideration of the constraints is output.

  When displaying the power generation plan at the time of restriction and the power generation plan at the time of restriction, or when displaying the power generation plan at the time of certain restriction and the power generation plan at the time of another restriction, the user of the power generation plan formulation device 10 However, it may be possible to select on the screen which power generation plan should be adopted. In this case, a selection instruction for selecting the power generation plan selected on the screen is output.

  The selection instruction is output to the previous formulation plan storage unit 26 and the power generation plan output unit 31. The power generation plan output unit 31 outputs the power generation plan indicated by the selection instruction to the outside. On the other hand, the previous formulation plan storage unit 26 stores the power generation plan indicated by the selection instruction in the previous formulation plan storage unit 301.

  According to the present embodiment, it is possible to entrust the user with the presence or absence of restrictions and the evaluation of the contents, and to adopt the power generation plan desired by the user.

(Fourth embodiment)
FIG. 11 is a block diagram showing the configuration of the power generation plan formulation device 10 of the fourth embodiment.

  The power generation plan formulation device 10 in FIG. 11 includes a removal / suspending utilization rate data input unit 16 and a removal / suspending utilization rate data storage unit 110 in addition to the components shown in FIG.

  The removal suspension utilization rate data storage unit 110 stores removal suspension utilization rate data input to the power generation plan formulation device 10 by the removal suspension utilization rate data input unit 16. The removal stop utilization rate data is data representing a set value of the removal stop utilization rate of the generator shown in FIG. The removal stop utilization rate data storage unit 110 of the present embodiment can store a set value of the removal suspension utilization rate for each generator, or a set value of the removal suspension utilization rate for each group to which a plurality of generators belong. Can also be stored. Further, the removal stop utilization rate data storage unit 110 of the present embodiment can also store setting information (setting period) of a period in which the set value of the removal stop utilization rate is applied to a predetermined generator.

  When calculating the load distribution of the generator shown in FIG. 2, the load distribution calculation unit 21 uses the set value of the removal stop utilization rate stored in the removal suspension utilization rate data storage unit 110. Specifically, the load distribution is calculated by correcting the output of the generator with the set value of the removal stop utilization rate. As a result, the fuel inventory calculation unit 24 can calculate the transition of the fuel inventory amount taking the removal / stop utilization rate into consideration.

  Note that the load distribution calculation unit 21 adopts a method as shown in FIG. 12B instead of the method as shown in FIG. 12A when correcting the output of the generator with the set value of the removal stop utilization rate. To do. FIG. 12 is a graph for explaining the output correction of the fourth embodiment, and shows an example of the time change of the output of the generator. In FIG. 12 (a), the entire output is uniformly raised and lowered. On the other hand, in FIG. 12B, the output is maintained at the peak of demand, while the output of the slope and the base of the graph is increased / decreased when the demand drops. Thereby, in FIG.12 (b), the situation where the generator with a high generation | occurrence | production unit price starts at the peak time of demand, or the situation where the demand at the peak time cannot be met can be prevented.

  Moreover, instead of the generator increased or decreased due to the removal / stop utilization rate, the generator is replaced with a generator having the same unit price (incremental cost).

  The load distribution calculation unit 21 may apply the setting value of the removal suspension utilization rate to all the generators among the generators for which the power generation plan is formulated, or the removal suspension utilization rate may be applied to only some of the generators. A set value may be applied. The number of generators to which the set value of the removal stop utilization rate is applied may be any number.

  The removal / stop utilization rate of the steam generator is given as a percentage display of the ratio between the actual output accumulated during operation and the rated output accumulated during operation. On the other hand, the removal / stop utilization rate of the generator for combined cycle power generation is given as a percentage display of the ratio between the actual output integrated during operation and the maximum output corrected during temperature correction during operation.

  According to this embodiment, it becomes possible to formulate a more accurate power generation plan in consideration of the removal / stop utilization rate of the generator.

(Fifth embodiment)
FIG. 13 is a block diagram illustrating the configuration of the power generation plan formulation device 10 of the fifth embodiment.

  13 includes an initial inventory calculation unit 29 in addition to the components shown in FIG.

  The initial inventory calculation unit 29 calculates the initial inventory amount of each fuel base at the beginning of the planning period based on the inventory amount data arbitrarily selected from the inventory amount data storage unit 109. Specifically, the initial inventory calculation unit 29 obtains a power generation plan of the same plan type as the power generation plan to be formulated (referred to as a “normal plan”) from the previously established plan storage unit 301, and the initial plan is initialized. Used for inventory calculation. For example, when the power generation plan to be formulated is a monthly plan, the monthly plan is acquired as the main plan.

  When the initial inventory calculation unit 29 acquires the main plan from the previous formulation plan storage unit 301, the initial inventory calculation unit 29 acquires the inventory amount plan line of each fuel base from the main plan, and the power generation plan scheduled to be formulated from the inventory confirmation date from this inventory amount plan line The received amount obtained from the accumulated fuel consumption amount of each fuel base up to the beginning of the planning period and the actual ship entry stored in the ship entry schedule data storage unit 108 is calculated. The fuel inventory quantity at the beginning of the planning period calculated in this way becomes the initial inventory quantity.

  The initial stock quantity of each fuel base calculated by the initial stock calculation unit 29 is output to the fuel stock calculation unit 24. The fuel inventory calculation unit 24 calculates the transition of the fuel inventory amount of each fuel base based on the initial inventory amount.

  When the inventory confirmation date is far from the beginning of the planning period, the initial inventory calculation unit 29 acquires a plurality of primary plans from the previously established plan storage unit 301 and uses these primary plans as initial inventory quantities. Used for calculation. In this case, the initial stock calculation unit 29 calculates a change in the fuel stock amount of each fuel base up to the beginning of the planning period of the power generation plan to be formulated by using a plurality of stock plan lines for the main plan. At this time, when a period of one main plan and another main plan overlap, the main plan with the newer plan start date is preferentially used.

ただし、Ｂは、在庫確認日の燃料在庫量を表す。Ｖｓ（ｋ）の総和は、在庫確認日から策定予定の発電計画の計画期間始めまでの燃料の累積消費量を表す。Ｃ（ｉ）の総和は、在庫確認日から当該計画期間始めまでのタンカーによる燃料の累積補充量を表す。 The initial stock quantity A of each fuel base calculated by the initial stock calculation unit 29 is given by the following formula (1).

However, B represents the fuel inventory amount on the inventory confirmation date. The sum of Vs (k) represents the cumulative amount of fuel consumed from the date of inventory confirmation until the beginning of the planning period of the power generation plan to be formulated. The sum of C (i) represents the cumulative amount of fuel replenished by the tanker from the inventory confirmation date to the beginning of the planning period.

  According to the present embodiment, it is possible to calculate the initial inventory quantity using a power generation plan formulated in advance.

(Sixth embodiment)
FIG. 14 is a graph showing a specific example of the transition of the fuel inventory amount in the power generation plan of the sixth embodiment. The power generation plan of this embodiment is formulated by the power generation plan formulation device 10 of FIG.

  A curve C1 shows a power demand curve from entry 1 to entry 2. Due to the fuel consumption by power generation, the entry 1 to the entry 2 change along the inventory plan line C2 as shown in FIG. Here, the inventory quantity planning line C2 is not stored between the inventory quantity upper limit line and the inventory quantity lower limit line, and does not satisfy the constraints.

  Therefore, the load distribution calculation unit 21 of the present embodiment takes into account the setting value of the fuel constraint coefficient stored in the fuel constraint coefficient data storage unit 111 (FIG. 15) when the change in the fuel inventory amount does not satisfy the constraint. And calculate the load distribution. FIG. 15 is a block diagram illustrating a configuration of a power generation plan formulation device according to the sixth embodiment. The fuel constraint coefficient data storage unit 111 stores the fuel constraint coefficient input from the fuel constraint coefficient data input unit 17.

  Multiply the fuel constraint coefficient by the deviation from the inventory target amount, and calculate the load allocation in a state where the constraint is satisfied by calculating the load allocation so as to minimize the total together with the fuel cost. .

  The strength of the fuel constraint coefficient can be set arbitrarily when there is a period until entering the ship, near the time of entering the ship, or at the end of the month. As the coefficient increases, the movement to satisfy the fuel constraint becomes stronger, but the economics of load distribution become worse.

  As a result, the inventory plan line C2 from entry 1 to entry 2 changes like the inventory plan line C3. The inventory plan line C3 is located between the inventory quantity upper limit line and the inventory quantity lower limit line, and satisfies the constraints.

  As an example, if the period until entering the ship is long and fluctuations in fuel consumption are expected depending on the future situation, the coefficient can be reduced to give more weight to economy. Even in that case, if there is no delay in inventory adjustment immediately before entering the ship, the constraint can be satisfied even if the coefficient is increased and the economy is sacrificed. In the case of monthly consumption restriction at the end of the month, in order to comply with the restriction range, it is possible to set a coefficient near the end of the month to ensure compliance with the restriction.

  When economic efficiency is sought while complying with fuel constraints, the inventory plan line C3 is adjusted so that it does not fall below the lower limit of inventory quantity so that it becomes the lower limit of inventory quantity when entering the ship. Adjust to the value obtained by subtracting the amount received when entering the ship from the upper limit.

  According to the present embodiment, it is possible to formulate a more economical power generation plan using the fuel constraint coefficient of the generator.

(Seventh embodiment)
FIG. 16 is a block diagram showing the configuration of the power generation plan formulation device 40 of the seventh embodiment.

  16 includes a processor 41 such as a CPU (Central Processing Unit), a main storage device 42 such as a RAM (Random Access Memory), an auxiliary storage device 43 such as an HDD (Hard Disc Drive), A network interface 44 such as a LAN (Local Area Network) board, a device interface 45 such as a memory slot and a memory port, and a bus 46 for connecting these devices to each other are provided. The power generation plan formulation device 40 is, for example, a computer such as a PC (Personal Computer), and includes an input device such as a keyboard and a mouse, and a display device such as an LCD (Liquid Crystal Display) monitor.

  In the present embodiment, a power generation plan formulation program for causing a computer to execute information processing of the power generation plan formulation device 10 of any of the first to sixth embodiments is installed in the auxiliary storage device 43. The power generation plan formulation device 40 of this embodiment develops this program in the main storage device 42 and executes it by the processor 41. Thereby, the function of each block shown in FIG. 1, FIG. 7, FIG. 10, FIG. 11, FIG. 13 or FIG. 15 is realized in the power generation plan formulation device 40 of this embodiment, and in the first to sixth embodiments. The described power generation plan can be output. Note that data generated by this information processing is temporarily stored in the main storage device 42 or stored and stored in the auxiliary storage device 43.

  For example, the power generation plan formulation program can be installed by mounting the external device 50 in which the program is recorded on the device interface 45 and storing the program from the external device 50 into the auxiliary storage device 43. An example of the external device 50 is a computer-readable recording medium or a recording device incorporating such a recording medium. Examples of the recording medium are a CD-ROM and a DVD-ROM, and an example of the recording device is an HDD. Further, the power generation plan formulation program can be installed by downloading the program via the network interface 44, for example.

  According to this embodiment, it becomes possible to implement | achieve the function of the power generation plan formulation apparatus 10 in any one of 1st-6th embodiment with software.

  Although several embodiments have been described above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. The novel devices, methods, and programs described herein can be implemented in various other forms. In addition, various omissions, substitutions, and changes can be made to the forms of the apparatuses, methods, and programs described in the present specification without departing from the spirit of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

DESCRIPTION OF SYMBOLS 10: Electric power generation plan formulation apparatus 11: Equipment data input part 12: Demand data input part 13: Inspection plan data input part 14: Ship entry plan data input part 15: Inventory quantity data input part 16: Removal stop utilization rate data input part 17: Fuel constraint coefficient data input unit 21: Load distribution calculation unit 22: Dispensing capacity calculation unit 23: Pipe flow rate calculation unit 24: Fuel inventory calculation unit 25: Constraint confirmation unit 26: Previously established plan storage unit 27: BOG calculation unit 28: Comparison Selection unit 29: Initial inventory calculation unit 31: Power generation plan output unit 40: Power generation plan development device 41: Processor 42: Main storage device 43: Auxiliary storage device 44: Network interface 45: Device interface 46: Bus 50: External device 101: Vaporizer data storage unit 102: Generator data storage unit 103: Pipeline topology storage unit 10 : Conduit data storage unit 105: base data storage unit 106: demand data storage unit 107: planned inspection data storage unit 108: planned entry data storage unit 109: inventory amount data storage unit 110: removal stop utilization data storage unit 111: fuel Constraint coefficient data storage unit 201: Load distribution transition storage unit 202: Pipe flow rate transition storage unit 203: Fuel inventory transition storage unit 301: Previously formulated plan storage unit

Claims (10)

Data on a plurality of power generation facilities, data on a plurality of fuel bases supplying fuel to the power generation facilities, data on conduits supplying the fuel from the fuel bases to the power generation facilities, and entering the fuel base A power generation information processing unit that calculates a change in the amount of inventory of the fuel at the fuel base based on data on the tanker
A power generation plan output unit that outputs a power generation plan for the power generation facility based on a transition of the inventory amount of the fuel;
A power generation plan development device comprising: The power generation information processing unit
A load distribution calculation unit for calculating a load distribution at which the total cost of the power generation equipment is the lowest,
A payout capacity calculation unit for calculating the discharge capacity of the fuel from the fuel base based on the capacity of the carburetor in the fuel base;
A conduit flow rate calculation unit for calculating a flow rate of the fuel in the conduit based on the load distribution and the discharge capacity;
A fuel inventory calculation unit for calculating a change in the inventory of the fuel in the fuel base based on the flow rate of the fuel in the conduit and data on the tanker;
The power generation plan formulation device according to claim 1. The power generation information processing unit further includes a constraint confirmation unit that confirms whether or not the transition of the inventory amount of the fuel satisfies the constraint,
3. The power generation according to claim 2, wherein the load distribution calculation unit recalculates the load distribution so as to satisfy the constraint with a minimum amount of change when the transition of the inventory amount of the fuel does not satisfy the constraint. Planning device. The power generation information processing unit further includes a BOG calculation unit that calculates a BOG (Boil of Gas) amount generated from the fuel,
The power generation plan formulation device according to claim 2 or 3, wherein the conduit flow rate calculation unit calculates the flow rate of the fuel in the conduit based on the BOG amount.   5. The load distribution calculation unit calculates the load distribution based on a set value of a removal / stop utilization rate of one or more power generation facilities among the plurality of power generation facilities. 6. The power generation plan development device described in 1.   The load distribution calculation unit calculates the load distribution so as to satisfy a fuel constraint based on a set value of a fuel constraint coefficient so as to satisfy the constraint when a transition of the inventory amount of the fuel does not satisfy the constraint. The power generation plan formulation device according to any one of claims 2 to 5. The power generation information processing unit displays a comparison result of a difference in power generation status due to a difference in constraints on the transition of the fuel inventory amount on a screen, and outputs an instruction to select the power generation plan according to input information from the screen With a comparison and selection unit,
The power generation plan formulation device according to any one of claims 1 to 6, wherein the power generation plan output unit outputs the power generation plan selected based on the selection instruction. The power generation information processing unit
An initial inventory calculation unit for calculating an initial inventory amount of the fuel at the fuel base based on one or more power generation plans established in advance;
A fuel inventory calculation unit that calculates a transition of the inventory amount of the fuel at the fuel base based on the initial inventory amount of the fuel;
The power generation plan formulation device according to any one of claims 1 to 7. Data on a plurality of power generation facilities, data on a plurality of fuel bases supplying fuel to the power generation facilities, data on conduits supplying the fuel from the fuel bases to the power generation facilities, and entering the fuel base Based on the data about the tanker to be used, the power generation information processing unit calculates the change in the inventory of the fuel at the fuel base,
Based on the change in the inventory of the fuel, the power generation plan for the power generation facility is output by the power generation plan output unit.
A power generation plan formulation method. Data on a plurality of power generation facilities, data on a plurality of fuel bases supplying fuel to the power generation facilities, data on conduits supplying the fuel from the fuel bases to the power generation facilities, and entering the fuel base Based on the data about the tanker to be used, the power generation information processing unit calculates the change in the inventory of the fuel at the fuel base,
Based on the change in the inventory of the fuel, the power generation plan for the power generation facility is output by the power generation plan output unit.
A power generation plan formulation program that causes a computer to execute a power generation plan formulation method.

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