JP6661501B2 - Generator operation plan creation device, generator operation plan creation method, program, data, and generator control device - Google Patents

Description

  Embodiments of the present invention relate to a generator operation plan creation device, a generator operation plan creation method, a program, data, and a generator control device.

  For the power generation department of a power company, it is important to predict future power demand that fluctuates in a short period of time, and to plan a generator operation based on the prediction, for example, to satisfy the same amount for 30 minutes. Is one of the important tasks. In addition, it is necessary to prepare not only a short-term operation plan of the generator on the day, but also a medium- or long-term operation plan such as monthly or yearly. When formulating an operation plan for a medium or long term such as monthly or annually, fuel consumption must also be considered. For example, taking into account the stock plan of fuel stored at the base and the plan to enter a tanker for fuel transportation, make sure that the fuel level at the fuel base is within the allowable range throughout the planning period. After deciding the consumption amount, it is necessary to perform an integrated optimization process and create a plan. Otherwise, even if a tanker loaded with fuel enters the ship, there is a problem that all the loaded fuel cannot be stored in the fuel depot.

  Such fuel station inventory constraints make it extremely difficult to calculate an optimal operating plan. For example, there is a problem that the calculation process of an optimal operation plan cannot be completed in a calculation time of about one minute that is allowed in actual operation.

Patent No. 4566980 Patent No. 5047014 Japanese Patent No. 5412332

  The embodiment of the present invention quickly creates an optimal operation plan of a generator in consideration of both economy and proper stock of fuel.

  The generator operation plan creation device according to the embodiment of the present invention includes a deviation cost indicating a degree of deviation between a second consumption target value and a consumption amount of articles consumed by operation of the generator, and an article cost in the consumption amount. , An operation plan creating unit that creates an operation plan of the generator based on the operation plan. The article cost indicates a cost related to the article. The second consumption target value is calculated by correcting the first consumption target value of the article calculated based on the article cost so as to satisfy the stock constraint in a period based on the stock constraint of the article. .

FIG. 1 is a block diagram showing an example of a schematic configuration of a generator operation plan creation device according to an embodiment of the present invention. The figure which shows an example of the fuel base data stored in a fuel base data storage part. The figure explaining the process of the fuel consumption target line preparation part. The figure explaining the process which produces a fuel consumption target line using a penalty function. The figure which shows an example of the created operation plan. 5 is a flowchart of a schematic process of the generator operation plan creation device. FIG. 1 is a block diagram showing an example of a hardware configuration according to an embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Embodiment of the present invention)
FIG. 1 is a block diagram illustrating an example of a schematic configuration of a generator operation plan creation device according to an embodiment of the present invention. The generator operation plan creation device 1 shown in FIG. 1 includes a power demand data storage unit 11, a generator operation data (actual data) storage unit 12, a condition storage unit 13, a fuel base data storage unit 14, It includes a most economical plan line creating unit 15, a fuel consumption target line creating unit 16, an operation plan creating unit 17, and an operation plan storage unit 18. The generator operation plan creation device 1 is directly or indirectly connected to a power demand prediction system 2, a generator operation data acquisition system 3, an input / output device 4, a communication interface or a device interface, and transmits and receives data. Is possible.

  The power demand data storage unit 11 stores power demand data acquired from the power demand prediction system 2 and the like. The power demand data represents time-series data on power demand prediction. The predicted power demand is also the supply power to be satisfied by the generators for which the generator operation plan creation device 1 creates an operation plan.

  The generator operation data storage unit 12 stores generator operation data acquired from the generator operation data acquisition system 3 or the like. The generator operation data represents data relating to the operation of a plurality of generators for which the generator operation plan creation device 1 creates an operation plan. For example, data on basic characteristics of the generator, such as a coefficient indicating the relationship between the output power of the generator and the fuel cost, is included.

  The type of the generator is not particularly limited as long as the generator uses fuel. The fuel is not particularly limited, and may be a fossil fuel, a woody fuel, or a nuclear fuel. The fuel cost may be, for example, a cost (charge) for purchasing the fuel, a cost for managing the fuel, or a combination of a plurality of costs.

  The condition storage unit 13 stores condition data obtained from the input / output device 4 or the like. The condition data includes a calculation formula necessary for creating a plan. Also, there are included parameters used in the calculation formula and constraints such as conditional formulas to be satisfied by the calculation formula. In this case, the operation plan with the lowest fuel cost is assumed to be optimal. However, the operation plan may not be the lowest but may be the highest, or may be the closest or farthest to a predetermined value. Such conditions may be included in the constraints.

  The fuel base data storage unit 14 stores the fuel base data acquired from the input / output device 4 or the like. The fuel base data represents data relating to fuel consumed by the generator. Here, it is assumed that the fuel consumed by the generator is stored in the fuel base corresponding to the generator. Although the generator is assumed to be supplied from one fuel terminal, the generator may be supplied from a plurality of fuel terminals.

  FIG. 2 is a diagram illustrating an example of fuel base data stored in the fuel base data storage unit 14. Here, as an example of the fuel station data, data on fuel arriving at the fuel station (transportation plan) and data on the stock of the fuel station (change plan of the upper and lower limits of the stock) are shown. Fuel station data is not limited to these examples, and may include data on various fuels.

  FIG. 2A shows an example of data of fuel arriving at the fuel station. Here, the data is based on the assumption that fuel is loaded on a tanker and sent. The delivery of the fuel does not contribute to the embodiment of the present invention at all. The arrival date and time indicates the arrival date and time of the fuel, and the ship ID is the ID of the ship that carried the arrived fuel. The base ID is an ID indicating a base that stores the arrived fuel, and the amount of reception indicates the amount of fuel received by the base. Here, the unit of the amount of fuel is represented by ton.

  FIG. 2B shows an example of data indicating a plan for changing the upper and lower limits of inventory. The set date and time is the date and time at which the upper and lower limits of the stock are changed, and is set when a future fuel consumption plan such as monthly or annual is created. The base ID is an ID indicating the fuel base where the setting or the change is performed. The upper limit of the stock and the lower limit of the stock are arbitrarily determined in consideration of the amount of fuel arriving at the fuel depot, the amount of demand during the period, the amount of stockpiled for unexpected situations, and the like.

  The most economic plan line creation unit 15 generates the most economic plan line (first consumption target value). The most economical plan line indicates a generator operation plan in which the total sum of fuel costs consumed by each generator is the lowest, without taking into account restrictions such as stocks of fuel stations. The top economic plan line can be represented in various ways. For example, it may be represented by a fuel consumption amount within a predetermined period such as 30 minutes, or may be represented by an accumulated fuel consumption amount during a planning period. Here, in order to consider the stock of the fuel base later, the most economic plan line is created for each fuel base and is represented by the accumulated fuel consumption supplied by the fuel base. This amount is also the cumulative supply of the fuel station and the cumulative consumption of one or more generators to which the fuel station supplies.

  Note that, here, the most economic plan line is generated so that the fuel cost consumed by the generator is the lowest. However, as described above, the lowest economical plan line may be used instead of the cheapest, or may be the highest or closest to the predetermined value. It may be far away. These designations may be read from the constraint conditions, or may be determined in advance in the most economical plan line creation unit 15.

  A method by which the most economical plan line creating unit 15 generates the most economical plan line will be described. The most economical plan line creation unit 15 acquires the power demand data from the power demand data storage unit 11, the basic characteristics of the generator from the generator operation data storage unit 12, and the constraint conditions from the condition storage unit 13. Then, based on the obtained data, the most economic plan line that minimizes the fuel cost of the generator at the output power satisfying the power demand is calculated.

ｉは複数ある発電機を特定する番号（発電機ＩＤ）を示す。ｔは時刻を表すものであるが、ここでは、３０分の同時同量を想定しているため、３０分単位に区切られた期間の番号を示すとしてもよい。Ｘ_ｉｔは、時刻ｔにおける発電機ｉの出力電力量を表す。Ｘ_ｉｔは、非負の実数とし、単位はＭＷｈなどである。Ｕ_ｉｔは、時刻ｔにおける発電機ｉの運転状態を表す。Ｕ_ｉｔは、運転中ならば１、停止中ならば０で表される。係数ａ_ｉｔ、ｂ_ｉｔ、ｃ_ｉｔは、発電機運転電データに含まれる発電機の基本特性である。例えば、発電機の発電効率が良い場合における係数ａ_ｉｔ、ｂ_ｉｔは、発電効率が悪い場合よりも小さな値となる。なお、Ｕ_ｉｔ＝０（停止）のとき、Ｘ_ｉｔ＝０となるため、Ｕ_ｉｔは、定数項ｃ_ｉｔにのみ積算されている。 First, the calculation of the fuel cost of the generator will be described. The fuel cost of the generator can be obtained by using a calculation function indicating the relationship between the output power (supplied power) and the fuel cost. Calculation function, the output power of the generator is represented by the following equation consisting of two variables X _it and U _it indicating the operating state of the generator.

i indicates a number (generator ID) for specifying a plurality of generators. Although t represents time, since the same amount is assumed to be 30 minutes at the same time here, the number of the period divided in units of 30 minutes may be indicated. X _it represents the output electric energy of the generator i at the time t. X _it is a non-negative real number, and the unit is MWh or the like. U _it represents the operating state of the generator i at time t. _Uit is represented by 1 if the vehicle is running, and 0 if the vehicle is stopped. Coefficients _a, b _{it, c} it is a basic characteristic of the generator contained in the generator operating electric data. For example, the coefficient a _it when the power generation efficiency of the generator is _good, b _it is a value smaller than the power generation efficiency is poor. Note that when U _it = 0 (stop), X _it = 0, so U _it is integrated only in the constant term c _it .

Note that the formula for calculating the fuel cost is not limited to the formula (1). In equation (1), but represents the fuel cost by a quadratic function of X _it, may be represented by such linear function.

式（２）のｄ_ｔは、時刻ｔにおける電力需要を示し、単位はＭＷｈなどで表される。ｄ_ｔは、電力需要データに含まれる。 Next, the constraint conditions at the time of calculating the fuel cost will be described. The most economic plan line creation unit 15 determines the values of the variables X _it and U _it so as to minimize the most economic plan line calculated by the equation (1) while satisfying the power supply and demand balance. First, the supply-demand balance is expressed by the following constraint equation.

_{D t} of formula (2) shows the power demand at time t, the unit is expressed in such MWh. _dt is included in the power demand data.

ここで、式（３）のｐ_ｉｔとｑ_ｉｔはそれぞれ、時刻ｔにおける発電機ｉの最小出力電力と最大出力電力を示し、単位はＭＷｈなどで表される。これらの情報は、発電機の基本特性に含まれる。 The output power of each generator has an upper limit and a lower limit. The output power of each generator has a constraint represented by the following equation.

Wherein each _{p it} and _{q it} equation (3) shows a minimum output power and maximum output power of the generator i at time t, the unit is expressed in such MWh. This information is included in the basic characteristics of the generator.

As described above, the most economical planning line creating unit 15 calculates the combination of X _it and U _it that minimizes the value of equation (1) while satisfying the constraints (2) and (3). . This solution calculation can be performed by executing a program such as a solver. Equations (1) through (3) are known by a mathematical classification called mixed integer quadratic programming problems, and this type of problem can be solved quickly by known solvers. Therefore, the most economical plan line creation unit 15 can be realized using a known solver.

式（４）のｅ_ｂｉｔとｆ_ｂｉｔは、ガス量と発電量を変換する一次係数と定数項を表す。ｅ_ｂｉｔとｆ_ｂｉｔは、発電機の基本特性に含まれる。 Next, the most economical plan line creation unit 15 calculates the consumption of the fuel stored in the fuel station based on the calculated output power amount of the generator. For example, it is assumed that gas as fuel is supplied to the generator i from the fuel terminal b. Assuming that the amount of gas supplied from the fuel base b to the generator i at time t is Y _bit , Y _bit is generally expressed by the following equation (4), which is a linear expression of the output power X _it of the generator i or It is represented by a quadratic equation.

In the equation (4), e _bit and f _bit represent a primary coefficient and a constant term for converting the gas amount and the power generation amount. The e _bit and the f _bit are included in the basic characteristics of the generator.

式（５）のＩ_ｂは、燃料基地ｂから燃料の供給を受ける発電機ｉの集合を示す。ここでは、式（５）より算出されるＷ_ｂｔを、時刻ｔにおける燃料基地ｂの最経済計画線とする。このように、最経済計画線で示される値は、基準の時刻から時刻ｔまでにおける累積値とする。 If the accumulated consumption at the fuel station b at time t is defined as W _bt , W _bt is represented by the following equation.

_{Ib in} equation (5) indicates a set of generators i that receive fuel supply from fuel station b. Here, W _bt calculated from equation (5) is set as the most economical plan line of fuel station b at time t. As described above, the value indicated by the most economical plan line is a cumulative value from the reference time to time t.

In equations (4) and (5), it is assumed that the generator is supplied from one fuel terminal, but may be supplied from a plurality of fuel terminals. Further, a more complicated situation such as exchanging fuel between fuel stations using a transfer pipe or the like is also assumed. In such a case, it is regarded as a network problem and formulated. For example, the Yb _it of formula (4), the generator i is replaced by the sum of the obtained gas amount from each fuel base. In addition, the amount of gas flowing through each transfer pipe connecting each fuel terminal and each generator, the total amount of gas transmitted from each fuel terminal, the total amount of gas obtained by each fuel terminal and each generator, and the like may be considered. .

  Expressions (1) to (5) are the most basic formulations for calculating the most economical planning line. Other considerations include various generator constraints, such as, for example, power change rate constraints, limits on starting and stopping, group power limits, and constraints between the fuel station and the generator, such as gas conduit flow limits. Then, a formulation may be performed. Therefore, the above-mentioned formulation is only a simple example for explaining the present embodiment, and does not limit the present invention.

Equations (1) to (4) are independently formulated in each time section described later, and can be calculated by a solver in chronological order. Although t and t-1 appear in equation (5), when calculating the most economical planning line, there is no other restriction on _Wbt, so that it is possible to calculate independently in chronological order. Therefore, the calculation of the most economic plan line can be performed at high speed due to the independence of the time section.

  The fuel consumption target line creating unit 16 generates a fuel consumption target line (second consumption target value) based on the most economical plan line generated by the most economical plan line creating unit 15. As mentioned above, the most economic planning line does not consider fuel station inventory. Therefore, the target fuel consumption line creating unit 16 generates the target fuel consumption line considering the stock of the fuel base.

  First, the fuel consumption target line creating unit 16 divides the planning target period at a time when one or both of the upper limit value and the lower limit value of the fuel stock at the fuel base is changed. Here, the lower limit value and / or the upper limit value of the fuel inventory of the fuel base are referred to as fuel base stock restrictions. The time section means a time or a predetermined period, for example, 30 minutes. By dividing in this manner, the fuel base inventory constraint does not change during the divided period, so that the calculation amount can be reduced with the fuel base inventory constraint as a constant.

  FIG. 3 is a diagram illustrating the processing of the fuel consumption target line creation unit 16. The vertical axis of the graph in FIG. 3 indicates the accumulated stock or consumption of fuel at a certain fuel terminal. The most economic plan line is indicated by a dotted curve. In FIG. 3, it is assumed that the receiving of fuel and the changing of the upper limit value and the lower limit value of the inventory are performed a plurality of times in the target fuel station during the period of the planning target. In FIG. 3, the acceptance of fuel is indicated by solid triangles, and the change in the upper and lower limits of inventory is indicated by open triangles. In addition, the time or the period when the fuel reception and the change of the upper limit value and the lower limit value of the stock of the fuel base occur are defined as the time section. The cross section is indicated by a dotted line perpendicular to the horizontal axis. According to the time section, the target fuel consumption line creating unit 16 divides the planned period into a plurality of divided periods. As described above, the division period is determined based on the fuel base stock restriction, and the fuel base stock restriction does not change during the period based on the fuel base stock restriction.

  When fuel is received, the cumulative upper and lower limits of fuel consumption at the fuel station increase according to the amount of fuel received. When the upper and lower limits of the stock are changed, the upper and lower limits of the fuel consumption also rise or fall. FIG. 3 shows the upper limit of fuel consumption in each cross section by black circles and the lower limit of fuel consumption by white circles. Since there is no change in fuel during the split period, the upper and lower limits of fuel consumption during the split period are constant. FIG. 3 shows the fuel consumption upper limit in the divided period by a straight line connecting the fuel consumption upper limit (solid circle) in the cross section at the beginning and end of the divided period. Similarly, the lower limit of fuel consumption in the divided period is indicated by a straight line connecting the lower limit of fuel consumption (open circle) in the cross section at the beginning and end of the divided period. The range between the upper limit and the lower limit of the fuel consumption in this division period is the allowable range of the fuel consumption of the generator. Further, in the time section, it is necessary to satisfy the allowable range of both the first divided period and the second divided period. The overlapping part of the allowable range in both the preceding divided period and the subsequent divided period is called a gate.

  In addition, the fuel consumption target line creating unit 16 generates the fuel consumption target line by correcting the most economical plan line within the divided period. The fuel consumption target line creating unit 16 performs correction on the most economical plan line in consideration of the lower limit value, the upper limit value, or both of the values that the fuel consumption of the generator should satisfy. The correction method may be arbitrarily determined. For example, it may be multiplied by a predetermined correction ratio. The correction ratio may be changed according to the distance from the lower limit or the upper limit. This corrected most economic plan line is referred to as a fuel consumption target line. The fuel consumption target line is a target value of the fuel consumed by the generator. In FIG. 3, the dotted curve indicates the most economic plan line, and the solid curve indicates the fuel consumption target line. It can be seen that the most economical plan line exceeding the upper limit of fuel consumption is reduced by the correction, and the target line of fuel consumption is included in the range surrounded by the upper and lower limits of fuel consumption, thereby satisfying the fuel base stock constraint.

  The calculation of the fuel consumption target line is a simple correction process, and therefore, is much faster than the solution calculation generally performed using a solver. Further, by making the computer process in parallel for each divided period, it is possible to further increase the speed.

  The operation plan creation unit 17 creates an operation plan for each generator based on the fuel consumption target line generated by the fuel consumption target line creation unit 16 and the fuel cost. The fuel consumption target line generated by correcting the most economic plan line satisfies the fuel station inventory constraint, but its economic efficiency is reduced. Therefore, reconsider fuel costs. The generated operation plan of the generator indicates the optimum fuel consumption of the generator during the split period.

  The operation plan creation unit 17 calculates a deviation cost based on the fuel consumption target line and the fuel consumption of the fuel station. The deviation cost indicates the degree to which the fuel consumption target line deviates (diverges) from the fuel consumption. In addition, the operation plan creation unit 17 obtains, as an optimal operation plan, the power amount of the generator when the sum of the deviation cost and the fuel cost in the fuel consumption amount related to the deviation cost calculation is minimized. That is, the operation plan creation unit 17 determines that the smaller the sum of the deviation cost and the fuel cost, the more appropriate the operation plan of the generator. Note that the operation plan creation unit 17 does not have to create an operation plan for all the divided periods, and may just create an operation plan for one divided period.

  Note that the case where the total sum approaches the predetermined value may be optimized instead of the case where the total sum is minimized. Further, instead of simply calculating the sum of the deviation cost and the fuel cost, a weight may be provided between the deviation cost and the fuel cost by multiplying the deviation cost by a weighting coefficient.

  The deviation cost is obtained based on a predetermined method. The method of calculating the deviation cost may be arbitrarily determined. For example, an amount obtained by multiplying a deviation (deviation) amount, which is a difference between the fuel consumption target line and the fuel consumption amount, by a predetermined penalty coefficient may be used as the deviation cost. Alternatively, a potential function using the deviation amount as a variable may be determined in advance, and a value calculated by the potential function may be used. The potential function may be arbitrarily determined. For example, a cubic function, an exponential function, or the like may be used such that the deviation cost increases sharply as the fuel consumption approaches the upper and lower limit values of the fuel base inventory constraint.

運転計画作成部１７は、式（２）から（５）を満たした上で、式（６）が最小となる最適な燃料消費量、つまり運転計画を求める。この求解計算は、式（１）と同様、ソルバーなどのプログラムを実行することにより、算出することができる。ゆえに、運転計画作成部１７も、公知のソルバーを用いて、実現することができる。 An example of the objective function including the deviation cost is shown in the following equation (6). In equation (6), the deviation cost is obtained by multiplying the absolute value of the value obtained by subtracting the target fuel consumption line G _bt from the optimum fuel consumption W _{bt at the} time t at the fuel base b by the penalty coefficient α. FC _it indicates the fuel cost at time t in generator i in equation (1).

The operation plan creation unit 17 obtains the optimal fuel consumption amount that minimizes the expression (6), that is, the operation plan, after satisfying the expressions (2) to (5). This solution calculation can be performed by executing a program such as a solver as in the case of Expression (1). Therefore, the operation plan creation unit 17 can also be realized using a known solver.

  After calculating the optimal fuel consumption, the operation plan creation unit 17 calculates the output power value of each generator for a predetermined period within the division period, for example, every 30 minutes, based on the optimal fuel consumption during the division period. Ask for more. Note that the output power value may be used as the operation plan.

Equation (6), like Equation (1), is formulated independently at each time section, and can be calculated by a solver in chronological order, and can be calculated at high speed. The upper and lower limits as shown in FIG. 3 regarding the accumulated consumption amount W _bt , and it is difficult to calculate at high speed as it is because of the restriction in the time axis direction, the objective function of Expression (6) By substituting, it is possible to increase the speed by performing independent calculation processing at each time section.

  Further, a penalty function may be used instead of the penalty coefficient which is a constant. For example, the absolute value of the value of the penalty function increases as the fuel consumption approaches the fuel base inventory constraint, that is, approaches the fuel consumption upper limit or the fuel consumption lower limit, and approaches 0 (zero) as the fuel consumption approaches the fuel consumption target line. It is conceivable to do so. In addition, the penalty coefficient and the penalty function need not be one type, and a plurality of types may be used.

FIG. 4 is a diagram illustrating a process of creating a fuel consumption target line using a penalty function.
FIG. 4A shows a graph of the accumulated fuel consumption at the fuel station. FIG. 4B shows the penalty function used. In FIG. 4, three types of penalty functions F, M, and S are used. As described above, in the penalty function, as the fuel consumption approaches the fuel consumption upper limit or the fuel consumption upper limit, the absolute value of the value of the penalty function increases, but the increase amount differs. F is the smallest increase, M is the second smallest, and S is the largest.

  The penalty function used for a certain period is shown below the horizontal axis in FIG. The penalty function to be used may be determined in advance, or the penalty function to be used may be determined according to the value of the objective function. For example, it is conceivable to use a function having a large increase amount near the gate. Here, the penalty function of F is used until the fuel consumption target line overlaps the midpoint between the upper limit of fuel consumption and the lower limit of fuel consumption, and thereafter the penalty function of M is used. As a result, as the time period approaches the end of the period, the amount of increase in the deviation cost increases, and the certainty that the operation plan passes through the gate is increased.

  Further, at the end of the planning period, a penalty function of S is used. As a result, at the end of the plan target period, the ratio of the deviation cost in the value of the objective function becomes higher than in the latter half of the previous divided period, and the degree of achievement of the fuel consumption plan can be increased.

  There is also a method in which upper and lower limits of fuel consumption, which are stricter than the upper and lower limits of fuel consumption, are set near the gate, and the value of the penalty function is determined based on the upper and lower limits. In FIG. 4A, as an example, the auxiliary line of the lower limit near the gate, which is the second lower limit, is indicated by a dotted curve. This auxiliary line starts when the target fuel consumption line overlaps the midpoint between the fuel consumption upper limit and the fuel consumption lower limit, and the midpoint between the auxiliary line and the fuel consumption upper limit becomes the fuel consumption target line. It is created as follows. Even if the value of the penalty function is determined such that the fuel consumption target line is closer to the auxiliary line by using such an auxiliary line, the deviation cost increases, even if the value of the penalty function is determined, the certainty that the operation plan passes through the gate Can be increased.

  The operation plan storage unit 18 acquires and stores the operation plan generated by the operation plan creation unit 17. The operation plan creation unit 17 or the operation plan storage unit 18 may output the operation plan to the input / output device 4 periodically or upon receiving a request query or the like from the input / output device 4. The output to the input / output device 4 may be data or a graph. It may be output (displayed) as an image or output as a file. Note that other information of the operation plan may be output. For example, a fuel base stock constraint, a most economic plan line, a fuel consumption target line, etc. may be output. When the operation plan storage unit 18 is realized by a database or the like, the output can be realized by using management software such as a DBMS of the database.

  FIG. 5 is a diagram illustrating an example of the created operation plan. The operation plan may be represented by a table as described above, or may be represented by a graph for each generator. The operation plan may be an operation plan for at least one generator, instead of an operation plan for all generators. The start date and time indicates a date and time when the operation state of the generator may be changed. Here, the start date and time are recorded at intervals of 30 minutes. This is because the operation plan was created every 30 minutes in consideration of the same amount for 30 minutes simultaneously, but the start date and time of this operation plan may be arbitrarily determined. The generator ID is an ID of a generator controlled by the operation plan. Here, only one is included, but a plurality of generator IDs may be included. The output value indicates the amount of power output by the generator indicated by the generator ID from the start time to the next start time. The fuel consumption may be recorded instead of or together with the electric energy. The operation state indicates the state of the generator. Here, states such as operation, stop, and periodic inspection are described, but there may be other states. In addition, here, the output value is set to 0 at the time of the periodic inspection as in the case of the stoppage, but a specified constant value may be output.

  Next, a flow of processing according to the present embodiment will be described. FIG. 6 is a flowchart of the entire process of the generator operation plan creation device 1. This flowchart is an example, and is not particularly limited. For example, the order of the processing that can be generated in advance may be changed. The process may be started when an instruction from the input / output device 4 is received, or started when power demand data, generator operation data, condition data, fuel base data, and the like are input or updated. May be done. Further, it may be executed periodically at a predetermined time or the like.

  The most economical plan line creator 15 acquires power demand data from the power demand data storage 11, basic characteristics of the generator from the generator operation data storage 12, and constraint conditions from the condition storage 13. Then, based on the obtained data, the most economical plan line that minimizes the fuel cost of the generator is calculated (S101). The generated most economic plan line is sent to the fuel consumption target line creating unit 16.

  The fuel consumption target line creating unit 16 acquires one or both of the change plan of the upper and lower limits of the stock and the fuel data (transportation plan) from the fuel base data storage unit 14, and sets the fuel base stock constraint based on these. After the generation, a division period is generated (S102). Note that the most economical plan line creating unit 15 may generate the target line instead of the fuel consumption target line creating unit 16. Then, the fuel consumption target line creating unit 16 calculates the upper limit and the lower limit of the fuel consumption in each of the divided periods, and sets the highest economic plan line in the divided period so as to satisfy the upper and lower limits of the fuel consumption. Is corrected (S103). When the correction is performed in all the divided periods, the corrected curves are connected to generate a fuel consumption target line (S104). The generated target fuel consumption line is sent to the operation plan creation unit 17.

  The operation plan creation unit 17 generates an operation plan based on the acquired target fuel consumption line, and outputs the generated operation plan to the operation plan storage unit 18 (S105). Note that the operation plan creation unit 17 may directly output the generated operation plan to the input / output device 4. The above is the flow of the entire processing of the generator operation plan creation device 1.

  As described above, according to the embodiment of the present invention, it is possible to simplify the problem and create an operation plan at a high speed by setting the constraint on time as an independent cost minimization problem in a time section. . In addition, by creating the fuel consumption target line from the most economical planning line, it is possible to create an operation plan that takes into account both the economics of the generator and the appropriate stock of the fuel base.

  The generator operation plan creation device 1, the power demand prediction system 2, the generator operation data acquisition system 3, and the input / output device 4 may exist on the same LAN, or may be on different networks. May be present. For example, the power demand forecasting system 2 is a system held by a power transmission and distribution department or a power transmission and distribution company. The generator operation plan creation device 1 and the like are held by a power generation department and a power generation company and the like. It is conceivable to appropriately receive power demand data from a power distribution company and create a generator operation plan.

  Further, for example, the generator operation plan creation device 1 exists on the cloud as a service providing device for providing an operation plan draft, and a power generation company or the like transmits the operation plan draft from the cloud, that is, data on the operation plan to its own network. It may be downloaded to a certain computer device. In this case, the input / output device 4 corresponds to a computer device. The download method is not particularly limited, and may be FTP or HTTP communication. Further, an e-mail to which data relating to the operation plan is attached may be received. Further, the data format such as txt, csv, xml, etc. is not particularly limited.

  Further, an integrated control device capable of controlling each generator may control the output power of the generator based on the data on the operation plan. For example, it is assumed that identification information such as an ID uniquely indicating each generator and plan information indicating an output power value of the generator during a period based on the fuel base stock constraint are included in the data on the operation plan. Then, the integrated control device can control the generator indicated by the identification information based on the data on the operation plan so as to satisfy the plan information. Thereby, the execution of the operation plan can also be automated. In addition, information such as an approval flag indicating that the power generation company or the like who has acquired the operation plan has actually approved the control is added to the data related to the operation plan. An integrated control device may control information.

  Further, the generator operation plan creation device 1 may be composed of a plurality of devices. That is, the generator operation plan creation device 1 may be a system. For example, a first generator operation plan creation device that is in charge of processing up to calculating the most economical plan line, and a second generator operation that is in charge of processing until the most economical plan line is corrected to generate the fuel consumption target line An operation plan creation system may be configured by a plan creation device and a third generator operation plan creation device that performs processing up to creation of an operation plan. Note that the number of constituent devices of the generator operation plan creation system and the processes in charge are not particularly limited.

In the present embodiment, the operation plan is created based on the output power amount X _it so as to reduce the fuel cost. However, other costs other than the fuel cost, which change according to the output power amount X _it , are taken into consideration. May be. That is, if there is another cost, the other cost may be added to equation (1). Another cost may be, for example, a cost for wastewater treatment, exhaust gas treatment, or the like, in which the larger the output power _Xit , the larger the treatment amount. Alternatively, the cost may be the cost of purchasing power from a customer in order to meet the power demand during the generator shutdown period.

また、需給バランスの制約式は、次式で表される。

Ｚ_ｔは、条件データに含まれていればよい。これにより、総合コストを考慮した運転計画を作成することができる。 For example, assuming that the electric power Z _t purchased from the consumer at time _t and the charge per unit of the electric power purchased from the consumer at time t are CP, the total cost is expressed by the following equation.

The constraint equation for the supply and demand balance is represented by the following equation.

Z _t may be contained in the condition data. This makes it possible to create an operation plan in consideration of the total cost.

  Further, in the present embodiment, the constraint on the stock of the fuel is set as the constraint, but the constraint on the stock of the product (waste) generated by the power generation may be added to the constraint. Products generated by power generation, such as coal ash (dust), cinders (clinker), slag, gypsum, radioactive waste, chemicals such as toluene, used cooling water, and recovered carbon dioxide, are waste products. Is transported to a processing facility after being stored at a base or the like. Therefore, a product inventory constraint may be used as a constraint so that the product generated by power generation does not exceed the upper limit of inventory.

  In the case of adding a product inventory constraint, the fuel consumption target line creating unit 16 generates a division period based on the fuel base inventory constraint, and then further divides the division period based on the product fuel base inventory constraint. . The division based on the product inventory constraint may be the same as the division based on the fuel base inventory constraint. That is, the fuel consumption target line creating unit 16 further divides the division period at a time when one or both of the upper limit value and the lower limit value of the waste inventory at the base for the waste is changed. As a result, the division period becomes finer than when no product stock restriction is applied, but the processing content can be the same.

  Note that, in the above description, fuel is assumed, but it is not necessary to use fuel as long as the article is consumed by the operation of the generator. That is, “fuel” may be read as “article”, and “fuel cost” may be read as “cost related to the article consumed by the operation of the generator”.

  The article consumed by the operation of the generator may be a power source for generating electricity, or may be a cooling water, a catalyst, or the like other than the power source. The power source is not particularly limited. For example, fossil fuel, wood fuel, and nuclear fuel may be used. Pumped water stored in dams etc. may be used. Chemical substances such as methylcyclohexane used in hydrogen power generation may be used.

  In addition, any article that is consumed by power generation may not be directly used for the generator. For example, it may be limestone or liquid ammonia used for removing a chemical substance contained in exhaust gas generated by power generation.

  Further, when “fuel” is read as “article”, the type of generator is not particularly limited. Thermal, hydro, and nuclear power generators may be used. A generator using natural energy such as wind power, sunlight, geothermal energy, and biomass may be used. A generator such as hydrogen power generation may be used. Further, a combination of different types of generators may be used.

  Each processing in the above-described embodiment can be realized by software (program). Therefore, the generator operation plan creation device 1 in the embodiment described above can be realized, for example, by using a general-purpose computer device as basic hardware and causing a processor mounted on the computer device to execute a program. It is.

  FIG. 7 is a block diagram illustrating an example of a hardware configuration according to an embodiment of the present invention. The generator operation plan creation device 1 includes a processor 51, a main storage device 52, an auxiliary storage device 53, a network interface 54, and a device interface 55, and can be realized as a computer device 5 which is connected via a bus 56.

  The processor 51 reads out the program from the auxiliary storage device 53, expands the program in the main storage device 52, and executes the program, so that the most economical plan line creation unit 15, the fuel consumption target line creation unit 16, and the operation plan creation unit 17 Function can be realized.

  The generator operation plan creation device 1 of the present embodiment may be realized by installing a program to be executed by the generator operation plan creation device 1 in the computer device 5 in advance, or a program such as a CD-ROM. It may be realized by being stored in a storage medium or distributed via a network and appropriately installed in the computer device 5.

  The network interface 54 is an interface for connecting to a communication network. When connected to the power demand prediction system 2, the generator operation data acquisition system 3, the input / output device 4, and the like by communication, the network interface 54 may be used. For example, the operation plan draft created by executing the program, that is, data on the operation plan is transmitted from the generator operation plan creation device 1 to the input / output device 4 via the network interface 54. Although only one network interface is shown here, a plurality of network interfaces may be mounted. Further, the network interface 54 and the connection destination system may be connected in a one-to-one or one-to-many manner.

  The device interface 55 is an interface for connecting to a device such as the external device 6. The external device 6 may be an arbitrary storage device or recording medium such as a HDD, a CD-R, a CD-RW, a DVD-RAM, a DVD-R, and a SAN (Storage area network). The power demand data storage unit 11, the generator operation data storage unit 12, the condition storage unit 13, the fuel base data storage unit 14, and the operation plan storage unit 18 are realized as a database or a table of the database, and have a device interface as an external storage device. 55 may be connected.

  The input / output device 4 is connected to a device interface 55 as an external device 6 including a display such as an LCD (Liquid Crystal Display) and a CRT (Cathode Ray Tube) and input devices such as a keyboard and a mouse. You may. An operation signal generated by operating an input device included in the input / output device 4 is output to the processor 51.

  The main storage device 52 is a memory device for temporarily storing instructions executed by the processor 51 and various data, and may be a volatile memory such as an SRAM or a DRAM or a nonvolatile memory such as a flash memory or an MRAM. The auxiliary storage device 53 is a storage device that permanently stores programs, data, and the like, and includes, for example, an HDD or an SSD. Data obtained from the power demand data storage unit 11, the generator operation data storage unit 12, the condition storage unit 13, the fuel base data storage unit 14, etc. or the most economical plan line creating unit 15, the fuel consumption target line creating unit 16, the operation plan The data generated by the creation unit 17 and the like is stored in the main storage device 52, the auxiliary storage device 53, and the external device 6.

  Although one computer device is shown in FIG. 7, software may be installed in a plurality of computer devices. The processing results may be generated by each of the plurality of computer devices executing a part of processing different in software.

  While one embodiment of the present invention has been described above, these embodiments are presented by way of example only and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

Reference Signs List 1 generator operation plan creation device 11 power demand data storage unit 12 generator operation data storage unit 13 condition storage unit 14 fuel base data storage unit 15 most economic plan line creation unit 16 fuel consumption target line creation unit 17 operation plan creation unit 18 Operation plan storage unit 2 Power demand forecasting system 3 Generator operation data acquisition system 4 Input / output device 5 Computer device 51 Processor 52 Main storage device 53 Auxiliary storage device 54 Network interface 55 Device interface 6 External device

Claims (16)

The first consumption target value of the article calculated based on the article cost indicating the cost of the article consumed by the operation of the generator is corrected so as to satisfy the stock constraint in a period based on the stock constraint of the article. A deviation cost based on the degree of deviation of the consumption amount of the article from the second consumption target value calculated thereby;
Article cost based on the consumption,
To be had based calculates the consumed amount of the best of the article, the consumption which is the optimum, or to the operating schedule of the generator information derived from the consumption that is the best, to A generator operation plan creation device equipped with an operation plan creation unit. The inventory constraint is a lower limit or an upper limit or both of the consumption of the article,
The generator operation plan creation device according to claim 1, wherein the period is a period during which the inventory constraint does not change. The deviation cost is
The generator operation plan creation device according to claim 1 or 2, wherein the generator operation plan creation device according to claim 1 or 2, which is calculated based on a deviation amount that is a difference between the consumption amount of the article and the second consumption target value. The generator operation plan creation device according to any one of claims 1 to 3, wherein an increase in the deviation cost increases as the consumption of the article approaches the inventory constraint. The generator operation plan creation device according to any one of claims 1 to 4, wherein an increase in the deviation cost increases as the end of the period based on the inventory constraint is approached.   The generator operation plan creation device according to any one of claims 1 to 5, wherein an increase in the deviation cost increases as the consumption of the article approaches the second lower limit. An output unit that displays data or a graph relating to at least one of the inventory constraint, the first consumption target value, the second consumption target value, and the operation plan of the generator as an image or outputs a file. The generator operation plan creation device according to any one of claims 1 to 6, comprising: The inventory constraint is generated based on one or both of a plan for changing the upper and lower limits of inventory of a base storing the articles and a transportation plan of the articles stored in the base. Generator operation plan creation device according to the paragraph. The operation plan creation unit,
The generator operation plan creation device according to any one of claims 1 to 8, wherein it is determined that the smaller the sum of the deviation cost and the article cost is, the more appropriate the operation plan of the generator is. A first calculation unit that calculates a first consumption target value of the article based on the article cost;
A second calculator configured to calculate a second consumption target value by correcting the inventory constraint based on the inventory constraint to satisfy the inventory constraint;
The generator operation plan creation device according to any one of claims 1 to 9, further comprising: The first consumption target value is:
The generator operation plan creation device according to any one of claims 1 to 10, wherein the generator operation plan creation device according to any one of claims 1 to 10, which is calculated based on a total cost obtained by adding a cost of purchasing power from a consumer to the goods cost. The second consumption target value is:
The generator operation plan creation device according to any one of claims 1 to 11, wherein the calculation is performed so as to satisfy an inventory constraint of a product generated by operation of the generator. Based on the article cost indicating a cost of goods consumed by the operation of the generator, calculating a first consumption target value of the article,
In the period based on inventory constraints of the article, and calculating a second consumption target value by correcting to satisfy the inventory constraints,
A step of calculating an optimal consumption amount of the article based on a deviation cost indicating a degree of deviation of the consumption amount of the article from the second consumption target value and the article cost in the consumption amount;
Consumption that is the best, or the steps of creating data according to the generator of the operation schedule information derived from the consumption that is the best, about,
Generator operation plan creation method comprising: Based on the article cost indicating a cost of goods consumed by the operation of the generator, calculating a first consumption target value of the article,
In the period based on inventory constraints of the article, and calculating a second consumption target value by correcting to satisfy the inventory constraints,
A step of calculating an optimal consumption amount of the article based on a deviation cost indicating a degree of deviation of the consumption amount of the article from the second consumption target value and the article cost in the consumption amount;
Consumption that is the best, or the steps of creating data according to the generator of the operation schedule information derived from the consumption that is the best, about,
A program for causing a computer to execute. The data created by the program according to claim 14, wherein identification information uniquely indicating the generator and plan information indicating an output power value of the generator during a period based on the inventory constraint are associated with each other. A generator control device that controls the generator indicated by the identification information based on the data according to claim 15 so as to satisfy the plan information.

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