JP6716420B2 - Power generation planning device, power generation planning method, and power generation planning program - Google Patents

Description

The embodiment of the present invention relates to a power generation plan formulation device, a power generation plan formulation method, and a power generation plan formulation program.

In the power generation department of a power company, it is one of important tasks to predict future power demand and make a power generation plan of a generator so as to meet the predicted power demand.

For example, when LNG (liquefied natural gas) is used as fuel for a generator, LNG is stored in a special tank, so that the LNG storage is more limited than the storage of petroleum or coal. Therefore, an accurate power generation plan for appropriately consuming and supplementing LNG according to the power demand is required.

Moreover, when supplying the electric power which satisfy|fills electric power demand with a some generator, it is desirable to reduce a power generation cost by stopping some generators at the time of a decrease in electric power demand. However, once the generator is stopped, it takes a long time to restart, so it may not be possible to stop the generator. Further, when the power demand gradually decreases, the generator may not be stopped if the amount of decrease in the power demand is smaller than the minimum power generation amount of the power generator to be stopped. Therefore, it may not be possible to sufficiently execute the start/stop control of the generator to reduce the power generation cost.

Japanese Patent No. 5452714

Therefore, it is an object of an embodiment of the present invention to provide a power generation plan formulation device, a power generation plan formulation method, and a power generation plan formulation program capable of reducing power generation cost by controlling the start/stop of a generator.

According to one embodiment, the power generation planning apparatus determines the power generation amount of the first to the Xth (X is an integer of 2 or more) generators at the times of the 1st to Mth (M is an integer of 2 or more) times. Is calculated in the order of the first to the M-th time, which is the earliest order, and the power generation amount of the first to the X-th generators at the N-th (N is an integer of 2 to M) time is calculated at the N-1 time. A power generation amount calculation unit that calculates based on the power generation amounts of the first to Xth power generators is provided. The apparatus further includes a power generation plan creation unit that creates a power generation plan for the first to Xth generators based on the power generation amounts of the first to Xth generators at the first to Mth times. The power generation amount calculation unit determines whether or not to start the generator stopped at the (N-1)th time at the Nth time, in the order of the first to Xth generators, which is the order in which the power generation cost is lowest. To do. The power generation amount calculation unit further determines whether or not to stop the generator being started at the N-1th time at the Nth time in the order of the Xth to the first generator in descending order of power generation cost. to decide.

It is a block diagram which shows the structure of the electric power generation plan formulation apparatus of 1st Embodiment. 5 is a graph for explaining a stop possibility determination process of the first embodiment. It is a figure for demonstrating the electric power generation amount of the generator of 1st Embodiment. It is a graph for explaining the amount of power generation of the generator of the first embodiment. 8 is a graph for explaining a stop priority calculation process of a comparative example of the first embodiment. 6 is a graph for explaining a stop priority calculation process of the first embodiment. It is a figure for comparing the stop priority calculation processing of a 1st embodiment and its comparative example. It is a flowchart which shows the power generation plan formulation method of 1st Embodiment. It is a flow chart which shows details of Step S3 of a 1st embodiment. It is a flow chart which shows details of Step S17 in a comparative example of a 1st embodiment. It is a flow chart which shows details of Step S24 in a comparative example of a 1st embodiment. It is a flow chart which shows details of Step S17 of a 1st embodiment. It is a flow chart which shows details of Step S45 of a 1st embodiment. It is a flow chart which shows details of Step S43 of a 1st embodiment. It is a flow chart which shows details of Step S46 of a 1st embodiment. It is a flow chart which shows details of Step S43 of a 2nd embodiment. It is a flowchart which shows the power generation plan formulation method of 2nd Embodiment. It is a flow chart which shows details of Step S15 of a 3rd embodiment. It is a figure for demonstrating the structural example of the conduit network of 4th Embodiment. It is a flowchart which shows the detail of the power generation plan formulation method of 4th Embodiment.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 20, the same or similar components are designated by the same reference numerals, and duplicate description will be omitted.

(First embodiment)
FIG. 1 is a block diagram showing the configuration of the power generation plan formulation device 1 according to the first embodiment. The power generation plan formulation device 1 formulates a power generation plan (operation plan) when the generator is activated and at what power generation output it operates. It should be noted that the generator may be various generators that differ in fuel and power generation method.

The power generation plan formulation device 1 exchanges data with the demand prediction system 2, the power generation data acquisition system 3, and the user input/output I/F (interface) 4. The power generation plan formulation device 1 includes a demand data storage unit 11, a basic characteristic data storage unit 12, a stop possibility determination unit 13, a stop priority calculation unit 14, an hourly processing unit 15, and a power generation plan creation unit 16. And a power generation plan creation condition storage unit 17 and a power generation plan data storage unit 18. The stop priority calculation unit 14 is an example of an increase determination unit. The hourly processing unit 15 is an example of a power generation amount calculation unit.

The demand forecasting system 2 supplies demand data, which is time-series data relating to forecasting of power demand, to the power generation plan formulation device 1. The demand power predicted from the demand data is also the supply power that the generator that is the target of the power generation plan should meet. The demand data supplied from the demand prediction system 2 is stored in the demand data storage unit 11.

The power generation data acquisition system 3 supplies basic characteristic data, which is data relating to the basic characteristics of the generator, to the power generation plan formulation device 1. Examples of the basic characteristic data are values of the rated MW and the minimum MW of each generator, information on constraints imposed on each generator, and the like. The basic characteristic data supplied from the power generation data acquisition system 3 is stored in the basic characteristic data storage unit 12.

The basic characteristic data storage unit 12 stores various constraint conditions to be satisfied by the power generation plan and various conditions regarding the power generation cost when the power generation plan is created.

As an example of the constraint condition, first, there is a constraint that the power supply amount at each time must be equal to or greater than the power demand prediction (demand-supply balance constraint). Secondly, there is a constraint (maximum/minimum constraint) on the maximum value and the minimum value of the output of the generator during startup. Thirdly, there is a constraint (output designation constraint) for fixing the output of a certain generator at a certain time to a predetermined value. Fourth, there is a constraint (mastran constraint) in which more than k generators must be stopped or started for a certain generator or a certain combination of generators. Fifth, there is a constraint that the generator that has been stopped once must be stopped for a certain time or more (stop time constraint) until the generator is started again. Sixth, there is a constraint (curve constraint) which must obey a predetermined stop curve constraint or start curve constraint when a certain generator starts or stops. Seventh, there is a restriction on the amount of change from the immediately preceding time to the next time (variation rate restriction). Eighth, there is a constraint (start/stop limit constraint) that a certain generator combination cannot be started or stopped within a certain time width. Ninth, there is an upper and lower limit constraint (conduit constraint) on the flow rate of the gas conduit passing through. Tenth, there is an upper and lower limit constraint (group output constraint) on the total amount of power generation for a certain combination of generators.

The power generation cost simply means the cost required for 1 kWh power generation due to the difference in fuel cost and the difference in power generation efficiency. However, the power generation cost includes 1) a fixed cost of the generator itself, and 2) costs related to start processing and stop processing when performing start determination and stop determination (for example, costs related to heat loss related to start/stop). ) And the like may be added. Further, these costs may take different values for each generator, each time, or each output immediately before the generator.

It is desirable for the power generation plan to meet the above constraints as much as possible and to minimize the total power generation cost.

The user input/output I/F 4 is a user interface used by the user for inputting/outputting information. The user input/output I/F 4 is used, for example, to input power generation plan creation conditions on the screen of the power generation plan formulation device 1 or to output the content of power generation plan data on the screen of the power generation plan formulation device 1. .. The power generation plan creation conditions input from the user input/output I/F 4 are stored in the power generation plan creation condition storage unit 17. On the other hand, the power generation plan data is read from the power generation plan data storage unit 18 and output to the user input/output I/F 4. Examples of the power generation plan creation conditions are the number of times the process is repeated when creating the power generation plan, the margin of variables and conditions, the generator swing/stop ratio, and the like.

When calculating the power generation amount of the generator at a predetermined time, the stop possibility determination unit 13 determines whether or not the generator can be stopped at that time. When calculating the power generation amount of a generator at a predetermined time, the stop priority calculation unit 14 determines whether or not it is possible to increase the power generation amount of another generator in order to stop that generator. Details of the stoppability determination unit 13 and the stop priority calculation unit 14 will be described later.

The hourly processing unit 15 calculates the power generation amounts of the plurality of generators at a plurality of times in the order of the earliest time, and uses the calculation result of the power generation amount at a certain time to calculate the power generation amount at the next time. In addition, the hourly processing unit 15 determines whether or not to start these generators at a certain time in order from the lowest power generation cost of the generator, and determines whether or not to stop these generators at a certain time. Are determined in descending order of power generation cost. As a result, it becomes possible to quickly formulate a power generation plan in which the power generation cost is kept low by using a simple logic for temporary processing. Details of the instant processing unit 15 will be described later.

The power generation plan creation unit 16 acquires the demand data from the demand data storage unit 11, the power generation plan creation condition from the power generation plan creation condition storage unit 17, and the plan calculation result at each time from the hourly processing unit 15. To do. Then, the power generation plan creation unit 16 creates a power generation plan for the plurality of generators at the plurality of times based on the acquired demand data, the power generation plan creation conditions, and the plan. The power generation plan created by the power generation plan creation unit 16 is stored as power generation plan data in the power generation plan data storage unit 18 for each time mesh.

The processes of the stoppability determination unit 13, the stop priority calculation unit 14, the temporary processing unit 15, and the power generation plan creation unit 16 are, for example, the power generation plan stored in the HDD (Hard Disc Drive) of the power generation plan formulation device 1. This can be realized by executing the formulation program by the CPU (Central Processing Unit) of the power generation plan formulation device 1. In the present embodiment, a computer-readable recording medium recording this program may be inserted into the memory interface of the power generation plan planning device 1, and this program may be installed from the recording medium into the HDD.

FIG. 2 is a graph for explaining the stoppability determination process of the first embodiment.

The curves α, α′, and α″ in FIG. 2 show examples of the temporal changes in the power demand predicted from the demand data. These show examples in which the power demand gradually decreases and then gradually increases. However, the power demand on the curve α′ changes more slowly than the power demand on the curve α, and the power demand on the curve α″ changes sharper than the power demand on the curve α.

Curve alpha, alpha ', the power demand of the alpha "is the same value at time t _1. Then, the time in the curve alpha, from the time t ₁ the power demand decreases, has elapsed from the time t ₁ for the time T power demand to t ₄ is returned to the value at time t _1. Further, 'the time from t ₁ time T' curve alpha (> T) only elapsed time to the power demand is returned to the value at time t ₁ cage, "in the time T from the time t _1" curve α in (<T) only elapsed time power demand has returned to the value of the time t _1.

A curve β in FIG. 2 shows start/stop control of a certain generator. In the curve β, the generator stop process is started at time t ₁ , the generator stop process is completed at time t ₂ , the generator restart process is started at time t _3, and the generator stop process is started at time t _4. The restart process of has been completed.

FIG. 2 shows an example in which the start/stop of the generator is controlled like the curve β when the power demand is predicted to change like the curve α. Specifically, since the power demand decreases from time t ₁ and the power demand returns to the value at time t ₁ at time t ₄ , it is planned to stop the generator from time t ₁ to time ₄ .

In this case, the relationship between the time from time t ₂ to time t ₄ (hereinafter referred to as “stop time”) and the minimum stop time S of the generator becomes a problem. The minimum stop time S is the minimum time required from the completion of the stop of the generator to the completion of the restart, and the generator cannot be restarted in a shorter time than the minimum stop time S. The minimum stop time S may be a different value for each generator or a value common to some generators.

When the power demand changes as indicated by the curve α, the stop time is the same as the minimum stop time S, so that the generator can be stopped from the time t ₁ to the time t ₄ (=t ₁ +T). That is, when the generator stop process is started at time t ₁ , the generator restart process can be completed at time t ₄ (=t ₁ +T) when the power demand is restored.

Similarly, when the power demand changes as indicated by the curve α′, the stop time becomes longer than the minimum stop time S, so that the generator can be stopped from the time t ₁ to the time t ₁ +T′. That is, when starting the stop processing of the generator at time t ₁ can complete the restart process of the generator at time t _{1 +} T 'power demand is restored.

On the other hand, when the power demand changes as indicated by the curve α″, the stop time becomes shorter than the minimum stop time S, and therefore the generator cannot be stopped from the time t ₁ to the time t ₁ +T″. That is, when starting the generator stops processing time t ₁ is not able to complete the restart process of the generator at time t _{1 +} T "power demand is restored.

The stop possibility determination unit 13 (FIG. 1) is based on the minimum stop time S of the generator and the change in the power demand when determining whether to stop the generator at time t _1. Then, it is determined whether or not the generator can be stopped at time t ₁ . Specifically, like the curve α or the curve α′, if the time at which the power demand is restored is time t ₂ +S or later, it is determined that the generator can be stopped. On the other hand, if the time at which the power demand is restored is earlier than the time t ₂ +S as indicated by the curve α″, it is determined that the generator cannot be stopped.

The determination result of the stop possibility determination unit 13 is output to the temporary processing unit 15. The hourly processing unit 15 refers to the determination result of the stopability/non-determination unit 13 before deciding whether or not to start the stopping process of a certain generator at time t ₁ . Then, if the generator is determined to be stopped at time t ₁ stops the generator at time t ₁ when necessary (i.e., stop processing is started at time t _1). On the other hand, if the generator is determined impossible stopped at time t ₁ does not stop the generator at time t _1.

FIG. 3 is a diagram for explaining the power generation amount of the generator according to the first embodiment.

FIG. 3A to FIG. 3D show the power generation amount of one generator. In FIG. 3(a), the power generation amount of the activated generator is the maximum power generation amount (max). In FIG. 3(c), the power generation amount of the activated generator is the minimum power generation amount (min). In FIG. 3(b), the power generation amount of the generator being started is a value between the maximum power generation amount and the minimum power generation amount. In FIG. 3D, the power generation amount of the stopped generator is zero.

As described above, the power generation amount of the activated generator can take a value from the maximum power generation amount to the minimum power generation amount, but cannot take a value smaller than the minimum power generation amount. Therefore, when it is desired to reduce the power generation amount of the power generator being activated to be lower than the minimum power generation amount, it is necessary to stop the power generator and set the power generation amount of the power generator to zero.

FIG. 4 is a graph for explaining the power generation amount of the generator according to the first embodiment.

FIG. 4A shows a time change of the power demand and a time change of the total power generation amount of the plurality of generators that operate to satisfy the power demand. The power generation plan formulation device 1 formulates a power generation plan such that the total power generation amount at each time is equal to or greater than the power demand. For example, the power generation amount total time T _N is set to be more than the power demand time T _N. However, in order to avoid wasteful power generation, it is desirable that the total power generation amount be as close as possible to the power demand. FIG. 4A shows an example in which the total amount of power generation at each time is almost equal to the power demand.

In addition, in FIG. 4A, the total power generation amount is set for each time mesh. The width of one mesh in this embodiment is, for example, 30 minutes. In this case, the total power generation amount at each time is given as the total power generation amount for 30 minutes (mWh), and the power demand at each time is given as the power demand amount for 30 minutes (mWh).

The power generation plan formulation device 1 calculates the power generation amounts of a plurality of generators at a plurality of times, and creates a power generation plan based on these calculation results. These times are examples of the first to M-th (M is an integer of 2 or more) times. These generators are examples of first to Xth (X is an integer of 2 or more) generators.

Specifically, the power generation plan formulation device 1 calculates the amount of power generated by a plurality of generators at a plurality of times in ascending order of time, and uses the calculation result of the amount of power generated at a certain time to determine the amount of power generated at the next time. calculate. For example, in FIG. 4 (a), the power generation amount of the generator at the time T _N is calculated from the power generation amount of the generator at the time T _N-1. The time T _N and the time T _N−1 are examples of the Nth time and the N−1th time, respectively (N is an integer from 2 to M). Note that specific examples of these generators are first to third generators (U _{1 to} U ₃ ) described later.

FIG. 4B shows the total power generation amount at time T _{N-1 and} the power generation amounts of the first to third generators (U _{1 to} U ₃ ) at time T _N-1 by hatching. At time T _N-1 , the power generation amount of the first power generator is the maximum power generation amount, the power generation amount of the second power generator is a value between the maximum power generation amount and the minimum power generation amount, and the third power generator. The power generation amount of is the minimum power generation amount. The power generation costs of the first, second, and third generators are 50 yen, 60 yen, and 70 yen, respectively.

In the present embodiment, a power generation plan is set up so that the power generator with the lowest power generation cost is started and the power generation amount of the power generator with the lowest power generation cost is increased. Therefore, the power generation amount of the first power generator at time T _N-1 is set to the maximum power generation amount. However, the power generation amount of the second generator is not set to the maximum power generation amount. The reason is that when the power generation amount of the second generator is set to the maximum power generation amount, it is necessary to set the power generation amount of the third generator to be less than the minimum power generation amount, which is as described with reference to FIG. Because it is impossible.

FIG. 4C shows the total amount of power generation at time T _{N and} the amount of power generation of the first to third generators at time T _N by hatching. Furthermore, the power generation amounts of the first to third generators at time T _N-1 are also shown for comparison.

Figure 4 (c), the power demand time T _N is, since the decrease by delta ₁ from time T _N-1 of the power demand, power-generating total amount of time T _N, the power generation amount total time T _N-1 Is decreased by Δ ₁ . Therefore, it is necessary to reduce the power generation amount of any of the first to third generators or stop any of the first to third generators.

Here, the power generation planning unit 1, when the power generation amount total time T _N is increased from the power generation amount Total time T _N-1, the generator stopped at time T _N-1 at time T _N Whether or not to start the engine is determined in order from the lowest power generation cost (that is, from the first to the third generator).

On the other hand, the power generation planning unit 1, when the power generation amount total time T _N is decreased from the power generation amount Total time T _N-1, stops the generator running at time T _N-1 at time T _N Whether or not to do so is determined in descending order of power generation cost (that is, from the third to the first generator).

Therefore, in FIG. 4C, it is determined whether or not to stop the third generator. At this time, there is a problem that the reduction amount Δ _{1 of the} total power generation amount is smaller than the minimum power generation amount Δ of the third generator (Δ ₁ <Δ). Is because when stopping the third generator, power generation amount total time T _N becomes smaller than the power demand time T _N.

Therefore, the power generation planning unit 1, a power generation amount of the second generator of the time T _N, the time T _N-1 of the second generator of the power generation amount from the _{Δ 2 (= Δ-Δ 1} ) to increase by consider. The reason is that if the power generation amount of the second generator can be increased by Δ ₂ , the power generation amount of the third generator can be decreased by Δ ₁ +Δ ₂ (that is, Δ). In this case, while setting the power generation amount total time T _N to the same value as the power demand time T _N, it is possible to stop the third generator. Δ ₁ and Δ ₂ are examples of the first value and the second value, respectively. Further, the second and third generators are examples of the Y−1th and Yth generators (Y is an integer from 2 to X).

Thus, the power generation planning unit 1, delta ₁ and the sum so reaches the minimum power generation amount delta of the third generator and delta _2, the time T _N-1 of the power generation amount of the second generator delta ₂ It is determined whether or not it can be increased. In FIG. 4(c), even if the power generation amount of the second generator at time T _N-1 is increased by Δ ₂ , the power generation amount of the second generator does not exceed the maximum power generation amount. Is determined to be “possible”.

In this case, the power generation planning unit 1, the third generator is stopped at time T _N, and the power generation amount of the second generator of the time T _N, the power generation amount of the second generator of the time T _N-1 Create a plan for time T _N to increase by Δ ₂ . The stop priority calculation unit 14 (FIG. 1) determines whether or not the power generation amount can be increased, and the determination result is output to the temporary processing unit 15. When the determination result is "possible", the hourly processing unit 15 creates a plan to stop the third generator and increase the power generation amount of the second generator. On the other hand, when the result of this determination is "impossible", a plan is created in which the power generation amount of the second generator is reduced by Δ ₁ without stopping the third generator.

At this time, the temporal processing unit 15 also refers to the determination result of the stop possibility determination unit 13 in addition to the determination result of the stop priority calculation unit 14. Specifically, the determination result of whether or not the third generator can be stopped at time T _N is referred to. Then, when the determination results of the stop possibility determination unit 13 and the stop priority calculation unit 14 are both “possible”, the hourly processing unit 15 stops the third generator and generates power from the second generator. Develop a plan to increase volume. On the other hand, if any one of the determination results is “impossible”, a plan is created in which the third generator is not stopped and the power generation amount of the second generator is reduced by Δ ₁ .

However, in the present embodiment, a configuration may be adopted in which the temporary processing unit 15 refers only to the determination result of the stop priority calculation unit 14. For example, when the present embodiment is applied to a situation in which the change in the power demand is sufficiently gradual, the temporary processing unit 15 does not refer to the determination result of the stoppability determination unit 13, but the stop priority calculation unit. A plan for each time may be created by referring to only the determination result of 14.

Next, the stop priority calculation processing of the first embodiment and its comparison example will be compared.

FIG. 5 is a graph for explaining the stop priority calculation process of the comparative example of the first embodiment.

5 (a) is, the power generation amount total time T _N has been shown to decrease by delta ₁ from power generation amount Total time T _N-1. FIG. 5B shows that this Δ ₁ is smaller than the minimum power generation amount Δ of the third generator (Δ ₁ <Δ).

In this case, as described above, the power generation amount of the third generator cannot be reduced by Δ ₁ . Therefore, in this comparative example, the power generation amount of the second generator of the time T _N, only time T delta ₁ from power generation of the second generator of _N-1 is reduced, the power generation amount of the third generator minimum power The amount Δ is maintained (FIG. 5(c)). As a result, the second generator with low power generation cost cannot be fully utilized, and the third generator with high power generation cost is operating in vain.

FIG. 6 is a graph for explaining the stop priority calculation process of the first embodiment.

6 (a) is power generation amount total time T _N has been shown to decrease by delta ₁ from power generation amount Total time T _N-1. FIG. 6B shows that this Δ ₁ is smaller than the minimum power generation amount Δ of the third generator (Δ ₁ <Δ). However, as shown in FIG. 6B, the power generation amount of the second power generator can be increased by Δ ₂ (=Δ−Δ ₁ ).

In this case, in the present embodiment, the time T _N a third generator stops, and the time T the amount of power generated by the second generator _N, the time T _N-1 of delta ₂ from the second generator of the power generation amount Only (FIG. 6(c)). This makes it possible to stop the third generator having a high power generation cost and fully utilize the second generator having a low power generation cost.

Prior to the processing of FIG. 6C, the temporary processing unit 15 of this embodiment refers to the determination results of the stoppability determination unit 13 and the stop priority calculation unit 14. That is, referring to the third and whether the determination result whether the generator to be stopped, the power generation amount of the second generator whether possible increased by delta ₂ at time T _N determination result at time T _N. Then, if any of the determination results is “impossible”, the process of FIG. 5C is executed instead of the process of FIG. 6C.

FIG. 7 is a diagram for comparing the stop priority calculation processing of the first embodiment and its comparison example.

FIG. 7A shows the power generation amounts of the first to third generators at time T _N in the comparative example. When this comparative example is applied in a situation where the power demand gradually decreases, as shown in FIG. 7(a), the power generation amount of the generator with high power generation cost is kept at the minimum power generation amount, which causes the power generation cost to rise. Become. In FIG. 7A, the power generation amount of the second power generator has not reached the maximum power generation amount, while the third power generator is operating at the minimum power generation amount.

On the other hand, FIG. 7B shows the power generation amounts of the first to third generators at time T _N in the first embodiment. When this embodiment is applied in a situation where the electric power demand gradually decreases, as shown in FIG. 7B, the generator with high power generation cost can be stopped and the power generation cost can be reduced. In FIG. 7B, the second generator is operating at the maximum power generation amount, and the third generator is stopped.

FIG. 8 is a flowchart showing the power generation plan formulation method of the first embodiment. This power generation plan formulation method is executed by the power generation plan formulation device 1 in FIG.

First, an input file for executing the power generation plan formulation method is read (step S1), and necessary demand data, basic characteristic data, power generation plan creation conditions, etc. are acquired. Next, pre-processing before creating a power generation plan is executed (step S2). Examples of the pre-processing are calculation processing regarding a conduit (pipeline) provided between the generators and calculation processing regarding the start/stop curve of the generator.

Next, the planning process by the hourly method is executed (step S3). Specifically, the processing by the stop availability determination unit 13, the stop priority calculation unit 14, the hourly processing unit 15, and the power generation plan creation unit 16 described above is executed. Details of step S3 will be described later.

Next, post-processing after creating the power generation plan is executed (step S4). An example of the post-processing is the additional processing of the start/stop curve of the generator. Next, the created power generation plan is written to an output file (step S5) and saved as power generation plan data.

FIG. 9 is a flowchart showing details of step S3 of the first embodiment.

First, create a plan for the time _{T 1} (step S11), and subsequently, the planning of the time _T 2 through T _M to create a loop process (step S12 to S19). The times T _{1 to} T _M correspond to the above-mentioned first to M-th examples.

The process of creating the plan for time T _N will be described below.

First, the process regarding the generator being activated at time T _N-1 is performed (step S13). Specifically, if the power generation amount of a certain generator being activated at time T _N-1 can be maintained, the power generation amount of the generator is also maintained at time T _N. Here, if it is not possible to keep this generator activated at time T _N due to output fixed constraint, mass transfer constraint, gas pipe lower limit constraint, group output lower limit constraint, etc., it is stopped.

Next, the process regarding the stopped generator is performed at time T _N-1 (step S14). Specifically, it is determined whether or not a certain generator stopped at time T _N-1 needs to be started at time T _N , and if necessary, the generator is started at time T _N. Here, when it is necessary to start this generator at time T _N due to output fixed restriction, mass transfer restriction, gas pipe lower limit restriction, group output lower limit restriction, etc., it is started.

Next, the process of satisfying the upper and lower limit constraints is applied to each generator (step S15). Examples of the upper and lower limit constraints are the upper and lower limits of the generator output, the generator group output, the conduit-related physical quantity, the output fluctuation rate, and the like. Details of the upper and lower limit constraints will be described later. Next, it is determined whether a constraint condition other than the supply and demand balance constraint is satisfied (step S16).

When it is determined in step S16 that the constraints other than the supply and demand balance constraint are satisfied, the start/stop and output fluctuation processing of each generator is executed (step S17). Specifically, the generator is started or stopped, or the output (power generation amount) of the generator is changed. The details of these processes will also be described later. Next, it is determined whether the plan creation at time T _N has succeeded (step S18).

When it is determined to be successful in step S18, the process at time T _N is ended and the process at time T _N+1 is started. In this way, a plan for times T _{1 to} T _M is created, and these plans are integrated to create a power generation plan. In this embodiment, a power generation plan can be created by repeating the processing of steps S12 to S19 without returning. In that sense, this processing is called time-dependent processing.

When it is determined in step S16 that the constraint is not satisfied, it is determined that the plan creation at time T _N has failed. In this case, the generation process of the power generation plan may be stopped, or the result may be ignored and the subsequent processes may be continued. In the latter case, it may be possible to automatically or manually perform the process for satisfying the constraint after the completion of the power generation plan. This is the same even when it is determined to be unsuccessful in step S18.

Hereinafter, step S17 of the first embodiment and step S17 of the comparative example thereof will be described with respect to the start, stop, and output fluctuation processing of step S17.

FIG. 10 is a flowchart showing details of step S17 in the comparative example of the first embodiment.

In this comparative example, first, the demand forecast value (electric power demand) at time T _N is calculated based on the demand data (step S21). Next, the forecast value of the time T _N is, determines whether or not the time T _N-1 of the power generation greater than or equal to the sum (step S22).

Forecast value of the time T _N is the case of the above power generation amount Total time T _N-1, in order to meet increasing demand, increasing the power generation amount total time T _N to forecast value at time T _N There is a need. Therefore, a raising/starting process of raising the power generation amount of the activated generator or starting the stopped generator is performed (step S23).

On the other hand, demand prediction value of the time T _N is the case of less than the power generation amount Total time T _N-1, in order to correspond to the reduction in demand, the power generation amount total time T _N to forecast value at time T _N Need to reduce. Therefore, a lowering/stopping process is performed to reduce the power generation amount of the activated generator or to stop the activated generator (step S24). This corresponds to the processing shown in FIGS. 5(a) to 5(c).

FIG. 11 is a flowchart showing details of step S24 in the comparative example of the first embodiment.

In step S24 first, a stop process for the generator _u 1 _{~u MAX} performs a loop process (step S31 to S34). This loop processing is performed in the order of the generators u _{MAX to} u ₁ in descending order of power generation cost. Next, the lowering process for the generators u _{1 to} u _{MAX is} performed by a loop process (steps S35 to S38). This loop processing is performed in the order of the generators u _{MAX to} u ₁ in descending order of power generation cost. The generators u _{1 to} u _MAX correspond to the examples of the first to Xth generators described above.

Hereinafter, the stopping process and the lowering process for the generator u _K will be described.

First a stopping process, determines the forecast value of the time T _N, the sum of the power generation amount of time T _N-1 of the generator u _K is, whether less than the power generation amount Total time T _N-1 (Step S32). If the determination result is YES, the demand can be satisfied even if u _K is stopped and the total power generation amount is reduced by the power generation amount of u _K , so the generator u _K is stopped at time T _N (step S33). On the other hand, if the determination result is NO, the demand cannot be satisfied if u _K is stopped and the total amount of power generation decreases by the amount of power generation of U _K , so the generator u _K is not stopped at time T _N.

At the time of step S33, only when the generator u _K is determined to be stopped by the stop-friendly non-determination process, and stops the generator u _K. Further, when the generator is stopped in step S33, the above "total power generation amount" is replaced with "total power generation amount-power generation amount of the generator" in the subsequent processing. That is, the total amount of power generation is decremented. The decremented total power generation amount is carried over to the loop processing of steps S35 to S38.

Next, in the lowering process, the power generation amount of the generator u _K is reduced if possible (step S36). Specifically, when the power generation amount of the generator u _K is reduced by a certain amount and the above total power generation amount is reduced by the reduction amount, the demand forecast value at time T _N is equal to or less than this total power generation amount. It is determined whether or not (step S37). If the determination result is NO, the demand cannot be satisfied if the power generation amount is reduced, and thus the reduction process is not performed. On the other hand, if the determination result is YES, the demand can be satisfied even if the amount of power generation is reduced, so this reduction process is performed and the reduction process is terminated. The final total power generation amount is the total power generation amount at time T _N.

In step S37 of the lowering process, if the demand forecast value at time T _N does not reach the total power generation amount or less to the end, the lowering/stopping process fails.

In the lowering/stopping process of this comparative example, the problems described in FIGS. 5(a) to 5(c) occur. Specifically, even the generator u _K can stop, if not be satisfied the demand Stopping the generator u _K can not stop the generators u _K. In this case, if the power generation amount of the power generator u _K-1 can be increased, the power generator u _K may be generated, but the step of performing such a process is not prepared in this comparative example. On the other hand, in this embodiment, steps for performing such processing are prepared.

FIG. 12 is a flowchart showing details of step S17 of the first embodiment.

In the present embodiment, first, a demand forecast value (power demand) at time T _N is calculated based on the demand data (step S41). Next, the forecast value of the time T _N is, determines whether or not the time T _N-1 of the power generation greater than or equal to the sum (step S42).

Forecast value of the time T _N is the case of less than the power generation amount Total time T _N-1, in order to correspond to a decrease in demand, there is a need to reduce the power generation amount total time T _N. Therefore, stop processing is performed to stop the generator that is being started (step S43). This corresponds to the processing shown in FIGS. 6(a) to 6(c).

In addition, when stopping the generator in step S43, the above "total power generation amount" is replaced with "total power generation amount-power generation amount of the generator" in the subsequent processing. That is, the total amount of power generation is decremented. The decremented total power generation amount is carried over to the processing of steps S44 to S46.

After the stop process of step S43 is executed, the process proceeds to step S44. Further, in step S42, the forecast value of the time _{T N} in each case over the power generation amount Total time _{T N-1,} the process proceeds to step S44.

In step S44, it is determined whether or not the demand forecast value at time T _N is equal to or more than the above total power generation amount. Here, when the result of step S42 is YES, the above-mentioned total power generation amount is the total power generation amount at time T _N-1 . On the other hand, when the result of step S42 is NO, the above-mentioned total power generation amount is the total power generation amount at time _TN-1 or the total power generation amount decremented in step S43.

When the demand forecast value at time T _N is greater than or equal to the above total power generation amount, it is necessary to increase the total power generation amount at time T _N in order to cope with the increase in demand. Therefore, a raising/starting process of raising the power generation amount of the activated generator or starting the stopped generator is performed (step S45).

On the other hand, when the demand forecast value at time T _N is less than the total power generation amount, it is necessary to reduce the total power generation amount at time T _N in order to cope with the decrease in demand. Therefore, a lowering process for lowering the power generation amount of the activated generator is performed (step S46).

As described above, in the present embodiment, the stopping process of step S43 and the lowering process of step S46 are separated. Details of these steps will be described later.

FIG. 13 is a flowchart showing details of step S45 of the first embodiment.

In step S45, the raising/starting processing for the generators u _{1 to} u _{MAX is} performed by loop processing (steps S51 to S55). This loop processing is performed in the order of the generators u _{1 to} u _MAX , which is the order in which the power generation cost is the lowest.

The raising/starting process of the generator u _K will be described below.

In the raising/starting process, the power generation amount of the generator u _K is increased if it can be increased (step S52), and the generator u _K is started if it can be started (step S53). Specifically, the power generation amount of the generator u _K is increased by a certain amount by starting or increasing the power generation amount, and the total power generation amount is increased by the increase amount, and the total power generation amount is the demand forecast value at time T _N. The loop process is repeated until or exceeds (step S54). If the decision result in the step S54 is YES, the raising/starting process is ended. The final total power generation amount is the total power generation amount at time T _N.

In addition, when the total power generation amount greatly exceeds the demand forecast value as a result of the raising/starting process (for example, when the output of the last starting generator is very large), a generator with a higher power generation cost is generated. By changing the starting order, the total power generation amount may be improved so as to approach the demand forecast value.

In step S54 of the raising/starting process, when the demand forecast value at time T _N does not reach the total power generation amount or less to the end, the raising/starting process fails.

FIG. 14 is a flowchart showing details of step S43 of the first embodiment.

In step S43, first, the stopping process for the generators u _{1 to} u _{MAX is} performed by a loop process (steps S61 to S64). This loop processing is performed in the order of the generators u _{MAX to} u ₁ in descending order of power generation cost.

Hereinafter, the stop process for the generator u _K will be described.

First a stopping process, determines the forecast value of the time T _N, the sum of the power generation amount of time T _N-1 of the generator u _K is, whether less than the power generation amount Total time T _N-1 (Step S62). If the determination result is YES, the demand can be satisfied even if u _K is stopped and the total power generation amount is reduced by the power generation amount of u _K , so the generator u _K is stopped at time T _N (step S63). On the other hand, if the determination result is NO, the demand cannot be satisfied if u _K is stopped and the total amount of power generation decreases by the amount of power generation of U _K , so the generator u _K is not stopped at time T _N.

At the time of step S63, only when the generator u _K is determined to be stopped by the stop-friendly non-determination process, and stops the generator u _K. Further, in the case of stopping the generator in step S63, in the subsequent processing, the above "total power generation amount" is replaced with "total power generation amount-power generation amount of the generator" (decrement). The decremented total power generation amount is carried over to the processing of steps S65 to S68.

Next, the generator u _A that can be stopped next is extracted in order of increasing power generation cost (step S65). For example, when the generators u _{MAX to} u _A+1 are stopped, the generators u _{A to} u ₁ are activated, and the generator u _A satisfies the stop possibility determination, the generator u _A is extracted.

Next, the amount of increase in power generation that can be achieved by the generator u _B whose generation cost is lower than that of the generator u _A is calculated (step S66). _A typical example of the generator u _B is the generator u _A-1 , and the generator u _B is _A and u _A-1 correspond to the above _- described third and second generators U ₂ and U ₁ . When the power generation amount of the generator u _B is smaller than the maximum power generation amount by the value P, the power generation increase amount achievable by the power generator u _B is the maximum value P.

Next, with respect to the forecast value of the time T _N, adds the power generation amount of time T _N-1 of the generator u _A, the value obtained by subtracting the power increase of the generator u _B at time T _N-1 is, It is determined whether the total power generation amount is less than or equal to the total power generation amount (step S67). If the determination result is YES, the demand can be satisfied if the total amount of power generation decreases by the amount of power generation of u _A and increases by the amount of power generation increase of u _B , so the generator u _A is switched on at time T _N. Stop (step S68). On the other hand, when the determination result is NO, the total amount of power generation decreases by the amount of power generation of u _K and the demand cannot be satisfied when the amount of increase of power generation of u _B increases, so power generation at time T _N Do not stop aircraft u _A. The total power generation amount is also decremented in step S68, and the final power generation amount is taken over in step S44.

The processing of steps S65 to S68 corresponds to the processing shown in FIGS. 6(a) to 6(c). Specifically, the process of increasing the amount of power generation of the generator u _B and stopping the generator u _A is the process of increasing the amount of power generation of the second generator U ₂ and stopping the third generator U _3. It corresponds. However, in steps S65 to S68, only the increase of the power generation amount of the generator u _B is determined, and the process of increasing the power generation amount of the generator u _B is performed by the raising/starting process. Such a process can be realized because the lowering process and the stopping process are separated, and the raising/starting process is performed after the stopping process. The information necessary for the raising/starting process for the generator u _B is provided from the stopping process to the raising/starting process.

FIG. 15 is a flowchart showing details of step S46 in the first embodiment.

In step S46, the lowering process for the generators u _{1 to} u _{MAX is} performed by a loop process (steps S71 to S74). This loop processing is performed in the order of the generators u _{MAX to} u ₁ in descending order of power generation cost.

Hereinafter, the lowering process for the generator u _K will be described.

In the lowering process, the power generation amount of the generator u _K is reduced if possible (step S72). Specifically, by reducing the power generation amount of the generator u _K by a certain amount and decreasing the total power generation amount by the reduction amount, the demand forecast value at the time T _N can match the total power generation amount. It is determined whether or not (step S73). If the determination result is NO, the total amount of power generation cannot be reduced so as to match the demand, so this reduction processing is not performed. On the other hand, if the determination result is YES, it is possible to reduce the total power generation amount so as to match the demand. Therefore, this reduction process is performed and the reduction process is ended. The final total power generation amount is the total power generation amount at time T _N.

In step S73 of the lowering process, when the demand forecast value at time T _N does not match the total power generation amount to the end, the lowering process fails.

As described above, the power generation plan formulation device 1 of the present embodiment calculates the power generation amounts of the plurality of generators at a plurality of times in order of earliest time, and uses the calculation result of the power generation amount at a certain time to move to the next time. Calculate the power generation amount of. Further, the power generation plan formulation device 1 of the present embodiment determines whether or not to start these generators at a certain time in order of the power generation cost of the generator, and whether or not to stop these generators at a certain time. It is determined in descending order of power generation cost of the generator.

Therefore, according to the present embodiment, the power generation cost can be reduced easily and appropriately by controlling the start/stop of these generators. For example, according to this embodiment, it becomes possible to formulate a power generation plan in which the power generation cost is kept low in a short time by a simple temporal logic.

(Second embodiment)
FIG. 16 is a flowchart showing details of step S43 of the second embodiment.

In the present embodiment, the stop process of FIG. 14 in the first embodiment is replaced by the stop process of FIG. In the stop processing of FIG. 16, steps S62 and S67 are replaced with steps S62' and S67', respectively, and step S60 is added.

In step S60, the target value by the stop processing is set by the formula of target value=demand forecast value+(total power generation amount−demand forecast value)×rate.

In step S62′, it is determined whether the sum of the target value and the power generation amount of the generator u _K is less than or equal to the total power generation amount at time T _N−1 . If the determination result is YES, it is determined whether u _K can be stopped, to stop possible stop u _K. On the other hand, when the determination result is NO, since the power generation amount total can not be reach the target value when reduced by the amount of power generated by the u _K, not stopped u _K.

The processing of steps S65 and S66 is the same as that of FIG. In step S67′, it is determined whether the value obtained by subtracting the power generation amount of the generator u _B from the sum of the target value and the power generation amount of the generator u _A is less than or equal to the total power generation amount at time T _N−1. .. If the determination result is YES, u _A is stopped. On the other hand, if the determination result is NO, u _A is not stopped.

The rate is a parameter that can be set arbitrarily. When the rate is set to 0 (0%), the process of FIG. 16 matches the process of FIG.

When the value of the rate is set to a value larger than 0, the total amount of power generation at each time can be set to a “target value” larger than the demand forecast value and the processing of steps S61 to S64 can be executed. The value of the rate is changed, for example, when the created power generation plan does not satisfy some conditions, and steps S61 to S64 and the like are executed again under the changed rate to create the power generation plan again. By repeating such processing, it is possible to create a power generation plan that satisfies as many conditions as possible. For example, it is effective in the case where the demand-supply balance constraint cannot be satisfied because the stopped generator cannot be started when the demand forecast value suddenly increases at the time after the generator is stopped.

FIG. 17 is a flowchart showing the power generation plan formulation method of the second embodiment. FIG. 17 shows a flow for setting or changing the rate. This flow is executed by the temporary processing unit 15 of FIG.

First, the rate is set to the default value (step S81). An example of a default value is 0%. Next, the processes of steps S82 to S86 are repeated up to four times. Details of this processing are as follows.

In step S83, the plan for the times T _{1 to} T _M is created using the set rate, as described above. Next, if the plan fails at a certain time T _RES (step S84), the rate is increased by Z% (for example, 25%) from the current rate for the time T _RES -ΔT _{BEFORE to} T _RES +ΔT _AFTER (( Step S85). Then, the processes of steps S83 to S85 are executed again. This makes it possible to create a plan that eliminates or reduces failures.

According to this embodiment, by changing the rate and recreating the power generation plan, it is possible to create a power generation plan that satisfies a predetermined condition. In the present embodiment, a parameter different from the rate may be adopted to execute the flow of FIG.

(Third Embodiment)
FIG. 18 is a flowchart showing details of step S15 of the third embodiment. See FIG. 9 for step S15.

In step S15, first, the processes of steps S91 to S98 are executed for the activated generator, and then the processes of steps S101 to S106 are executed for the activated generator without output designation. In the former process, the upper limit constraint is applied to the output of each generator or the linear sum of the outputs of several generators (hereinafter, referred to as "upper constraint satisfaction process"). On the other hand, in the latter process, the lower limit constraint is applied to the output of each generator or the linear sum of the outputs of several generators (hereinafter referred to as "lower limit constraint satisfaction process"). Examples of upper and lower limit constraints include a volatility constraint, a conduit constraint, and a group output constraint.

In the upper limit constraint satisfaction process, first, the upper limit constraint violation amount (Delta1) of the generator u _K is calculated (step S92), and if the violation amount is 0, the upper limit constraint satisfaction process for u _K is terminated (step S93). On the other hand, when the violation amount is larger than 0, it is determined whether or not the generator u _K can be stopped (step S94). As a result, if the generator u _K can be stopped, u _K is stopped and the upper limit constraint satisfying process for u _K ends (step S95). On the other hand, if impossible stop the generator u _K, to calculate the maximum possible amount reduces the amount of power generated by the u _K, it reduces the amount of power generated by the u _K by the maximum amount (Step S96, S97). In this way, the upper limit constraint satisfaction process for the generator u _K ends.

Subsequently, in the lower limit constraint satisfaction process, the lower limit constraint violation amount (Delta2) of the generator u _K is calculated (step S102), and if the violation amount is 0, the lower limit constraint satisfaction process for u _K is terminated (step S103). ). On the other hand, when the violation amount is greater than 0, the maximum amount that can increase the power generation amount of the generator u _K is calculated, and the power generation amount of the generator u _K is increased by the maximum amount (steps S104 and S105). In this way, the lower limit constraint satisfaction process for the generator u _K ends.

As described above, steps S12~S19 in FIG. 9 is executed by the loop processing time _T 2 through T _M. As a result, in the present embodiment, before calculating the amount of power generation of the generator u _K at time T _{N in} step S17, whether or not the generator u _K satisfies the upper and lower limit constraints at time T _N in step S16. Is determined. Therefore, according to this embodiment, can be a generator u _K at time T _N only if that satisfies the lower limit constraints on a predetermined, to a generator u _K time T _N and run against逐時process Becomes This makes it possible to formulate a power generation plan that satisfies the upper and lower limit constraints.

(Fourth Embodiment)
FIG. 19 is a diagram for explaining a configuration example of the conduit network according to the fourth embodiment.

The generator of the present embodiment is a thermal power generator that uses LNG as a fuel, and is connected to each other by a conduit (pipeline) for conveying LNG. These generators are also conduited to the fuel station that supplies the LNG.

FIG. 19 topologically shows the relationship between these generators, fuel bases, and conduits. Specifically, the nodes n _{1 to} n ₄ represent generators, and the nodes n ₅ and n ₆ represent fuel bases. Nodes n ₃ and n ₄ indicate branching/merging. Further, the arrow between the nodes n _{1 to} n ₆ indicates a conduit, and the direction of the arrow indicates the direction in which LNG flows.

The nodes n _{1 to} n ₆ are classified into several types. The nodes n ₁ and n ₂ are end nodes located at the ends of the conduit, and the nodes n ₃ and n ₄ are intermediate nodes located at positions other than the ends of the conduit. The intermediate node includes a confluence node (for example, n ₄ ) located at a confluence point of the conduit and a branching node (for example, n ₃ ) located at a branch point of the conduit. The node _{n 4} includes a node _n 5, _{n 6} is the parent node, and is connected to the node _{n 3} is a child node. The parent-child relationship between the nodes is defined by the upstream side and the downstream side of the LNG flow.

FIG. 19 shows the upper and lower limits of the LNG flow rate provided in each conduit. For example, the upper limit value (conduit upper limit) and the lower limit value (conduit lower limit) of the LNG flow rate in the conduit between the nodes n ₄ and n ₅ are 100 t/h and 10 t/h, respectively. As a result, each generator of the present embodiment is subject to upper and lower limit restrictions on the amount of fuel used per unit time.

This upper and lower limit constraint depends on the topological arrangement of the nodes n _{1 to} n ₆ . For example, the lower limit restriction on the fuel consumption of the generator located in the node n _1, the node n _1, the lower limit constraints and on the conduit LNG flow rate between n _3, the fuel consumption of the generator which is located in the node n ₃ Depends on the upper and lower bounds of. In this way, the relationship with the parent node (node n ₃ ) is taken into consideration at the end node, node n ₁ . On the other hand, in the node n ₄ which is an intermediate node, the relationship with not only the parent nodes (nodes n ₅ and n ₆ ) but also the child nodes (node n ₃ ) is considered.

FIG. 20 is a flowchart showing details of the power generation plan formulation method of the fourth embodiment. This flow is a process for setting the upper and lower limit constraints of the fuel usage amount of each generator, and the process of step S15 is executed after this process (see FIG. 9 and FIG. 18).

First, the nodes n _{1 to} n ₆ in FIG. 19 are sorted in the reverse order of the topological sort (step S111). That is, the nodes n _{1 to} n ₆ are sorted in order from the terminal side. Next, the upper and lower limit setting processing of steps S112 to S123 is executed as a loop processing in the sort order.

Hereinafter, the upper/lower limit setting process for the node n _A will be described.

In the upper/lower limit setting process, first, when the node n _A is the terminal node (step S113), the fuel usage amount f(u) when the power generation amount of the generator u corresponding to the node n _A is the maximum power generation amount is calculated. Yes (step S114). Next, when the upper limit of the conduit to the node n _A is less than f(u), an upper limit constraint expression is added (step S115). If the lower limit of the conduit to the node n _A is larger than 0, a lower limit constraint expression is added (step S116). Then, make the continuation flag of the node _{n A,} Komu adding information of the node _{n A} parent node _{n B} (step S117). For example, replacing the upper limit MAX _B of the parent node _{n B} to _MAX B + f (B). When the node n _A is the terminal node, the upper and lower limit setting process of the node n _A is completed in this way.

On the other hand, the node _n when _A is not a terminal node (step S113), whether a node _n all child nodes are _{n C} the continuation flag is set for _A, and the node _n 1 piece is the parent node _{n B} of _A alone Is determined (step S118). If the determination result in S118 is NO, the upper and lower limit setting process of the node n _A ends. On the other hand, if the decision result in S118 is YES, the information written as the information of the node n _A is referred to (step S119). Next, if the upper limit of the conduit to the node n _A is less than the upper limit MAX _A , an upper limit constraint expression is added (step S120). If the lower limit of the conduit to the node n _A is larger than 0, a lower limit constraint expression is added (step S121). Then, make the continuation flag of the node _{n A,} Komu adding information of the node _{n A} parent node _{n B} (step S122). For example, replacing the upper limit MAX _B of the parent node _{n B} to _MAX B + _{MAX A.} When the node n _A is not the terminal node, the upper and lower limit setting process of the node n _A is thus completed.

Then, in this embodiment, the same processing as that of the third embodiment is executed. That is, steps S12~S19 9, it is executed by the loop processing of the time _T 2 through T _M. Therefore, in the process of satisfying the upper and lower limit constraints of step S15, it is determined whether or not the upper and lower limit constraints of fuel consumption are satisfied. Therefore, according to this embodiment, the generator u _K at time T _N only if that satisfies the lower limit restriction on the fuel consumption amount, and the generator u _K time T _N and run against逐時process Is possible. This makes it possible to formulate a power generation plan that satisfies the upper and lower limits of fuel consumption.

Although some embodiments have been described above, these embodiments are presented only as examples and are not intended to limit the scope of the invention. The novel device, method, and program described herein can be implemented in various other forms. Various omissions, substitutions, and changes can be made to the forms of the apparatus, method, and program described in the present specification without departing from the spirit of the invention. The appended claims and their equivalents are intended to cover such forms and modifications as fall within the scope and spirit of the invention.

1: Power generation planning device, 2: Demand forecasting system,
3: Power generation data acquisition system, 4: User input/output I/F,
11: demand data storage unit, 12: basic characteristic data storage unit,
13: Stoppability determination unit, 14: Stop priority calculation unit,
15: hourly processing unit, 16: power generation planning unit,
17: Power generation plan creation condition storage unit, 18: Power generation plan data storage unit

Claims (7)

The power generation amounts of the first to Xth (X is an integer of 2 or more) generators at the 1st to Mth (M is an integer of 2 or more) times are in the order of the first to the Mth times, which is the earliest time. Calculate and calculate the amount of power generation of the first to Xth generators at the Nth time (N is an integer from 2 to M) based on the amount of power generation of the first to Xth generators at the (N-1)th time. And a power generation amount calculation unit that
A power generation plan creation unit that creates a power generation plan for the first to Xth generators based on the power generation amounts of the first to Xth generators at the first to Mth times;
A power generation planning device Ru with a,
The power generation calculation unit,
When the total amount of power generation of the first to Xth generators at the Nth time increases from the total amount of power generation of the first to Xth power generators at the N−1th time, at the N−1th time. It is determined whether or not the stopped generator is started at the N-th time in the order of the first to the X-th generators in the order of the lowest power generation cost,
When the total power generation amount of the first to Xth generators at the N-th time is reduced from the total power generation amount of the first to X-th power generators at the N-1th time, at the N-1th time. whether to stop the first N time the generator running, it is determined from the first X is a high power generation costs order in the order of the first generator,
The power generation planning device further includes
When the total amount of power generation at the N-th time is reduced by a first value from the total amount of power generation at the N-1th time, the first value is the Y-th (Y is an integer from 2 to X) generator. Y-1 generator at the (N-1)th time so that the sum of the first value and the second value reaches the minimum power generation amount of the Y-th power generator when it is smaller than the minimum power generation amount. An increase determination unit that determines whether or not it is possible to increase the amount of power generation by the second value,
The power generation amount calculation unit, when it is determined that the power generation amount of the Y−1th power generator at the N−1th time can be increased by the second value, the Yth power is calculated at the Nth time. Stopping the generator and increasing the amount of power generated by the Y-1th generator at the Nth time by the second value from the amount of power generated by the Y-1th generator at the N-1th time;
Power generation planning device. A stop possibility determination unit that determines whether or not the Yth generator can be stopped at the Nth time based on a minimum stop time of the Yth generator and a change in power demand,
The power generation amount calculation unit determines that the Y-th power generator can be stopped at the N-th time, and increases the power generation amount of the Y-1th power generator at the N-1th time by the second value. When it is determined that the Y-th generator is stopped at the N-th time, the Y-th generator at the N-th time is generated at the N-th time. Increasing the second value from the power generation amount of the (Y-1)th generator,
The power generation plan formulation device according to claim 1 . When the power generation plan does not satisfy a predetermined condition, the power generation amount calculation unit sets the values of the parameters related to the first to Xth generators so that the power generation plan that satisfies the predetermined condition is created. The power generation plan formulation device according to claim 1 or 2 , which is changed to recalculate the power generation amount of the first to Xth power generators. The power generation amount calculation unit determines that the variable relating to the Y-th (Y is an integer from 2 to X) generator at the N-th time satisfies a predetermined constraint, and then the Y-th generator at the N-th time is determined. The power generation plan formulation device according to any one of claims 1 to 3 , which calculates the amount of power generation. The power generation plan formulation device according to claim 4 , wherein the constraint is a constraint regarding a conduit for fuel transportation provided between the first to Xth generators. The power generation amount calculation unit sets the power generation amounts of the first to X-th (X is an integer of 2 or more) generators at the first to M-th (M is an integer of 2 or more) times in the order of the earliest time. From the Mth time, the power generation amounts of the first to Xth generators at the Nth time (N is an integer from 2 to M) are calculated from the first to Xth generators at the (N-1)th time. Calculated based on the amount of electricity generated,
A power generation plan creation unit creates a power generation plan for the first to Xth generators based on the power generation amounts of the first to Xth generators at the first to Mth times.
That a power generation planning method of Ru with a,
The power generation calculation unit,
When the total amount of power generation of the first to Xth generators at the Nth time increases from the total amount of power generation of the first to Xth power generators at the N−1th time, at the N−1th time. It is determined whether or not the stopped generator is started at the N-th time in the order of the first to the X-th generators in the order of the lowest power generation cost,
When the total power generation amount of the first to Xth generators at the N-th time is reduced from the total power generation amount of the first to X-th power generators at the N-1th time, at the N-1th time. whether to stop the first N time the generator running, it is determined from the first X is a high power generation costs order in the order of the first generator,
The power generation planning method further includes
When the total amount of power generation at the N-th time is reduced by a first value from the total amount of power generation at the N-1th time, the first value is the Y-th (Y is an integer from 2 to X) generator. Is smaller than the minimum amount of power generation, the increase determination unit determines that the sum of the first value and the second value reaches the minimum amount of power generation of the Y-th generator at the (N-1)th time. Determining whether it is possible to increase the amount of power generation of the Y-1 generator by the second value,
The power generation amount calculation unit, when it is determined that the power generation amount of the Y−1th generator at the N−1th time can be increased by the second value, the Yth at the Nth time. Stopping the generator and increasing the amount of power generated by the Y-1th generator at the N-th time by the second value from the amount of power generated by the Y-1th generator at the N-1th time;
Power generation planning method. The power generation amount calculation unit sets the power generation amounts of the first to X-th (X is an integer of 2 or more) generators at the first to M-th (M is an integer of 2 or more) times in the order of the earliest time. From the Mth time, the power generation amounts of the first to Xth generators at the Nth time (N is an integer from 2 to M) are calculated from the first to Xth generators at the (N-1)th time. Calculated based on the amount of electricity generated,
A power generation plan creation unit creates a power generation plan for the first to Xth generators based on the power generation amounts of the first to Xth generators at the first to Mth times.
A power generation plan formulation program that causes a computer to execute a power generation plan formulation method comprising
The power generation calculation unit,
When the total amount of power generation of the first to Xth generators at the Nth time increases from the total amount of power generation of the first to Xth power generators at the N−1th time, at the N−1th time. It is determined whether or not the stopped generator is started at the N-th time in the order of the first to the X-th generators in the order of the lowest power generation cost,
When the total power generation amount of the first to Xth generators at the N-th time is reduced from the total power generation amount of the first to X-th power generators at the N-1th time, at the N-1th time. whether to stop the first N time the generator running, it is determined from the first X is a high power generation costs order in the order of the first generator,
The power generation planning method further includes
When the total amount of power generation at the N-th time is reduced by a first value from the total amount of power generation at the N-1th time, the first value is the Y-th (Y is an integer from 2 to X) generator. Is smaller than the minimum amount of power generation, the increase determination unit determines that the sum of the first value and the second value reaches the minimum amount of power generation of the Y-th generator. Determining whether or not it is possible to increase the amount of power generation of the Y-1 generator by the second value,
The power generation amount calculation unit, when it is determined that the power generation amount of the Y−1th power generator at the N−1th time can be increased by the second value, the Yth power is calculated at the Nth time. Stopping the generator and increasing the amount of power generated by the Y-1th generator at the Nth time by the second value from the amount of power generated by the Y-1th generator at the N-1th time;
Power generation planning program.

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