Simulation method for power supply system, computer program, and simulation device

Abstract

On the basis of a temporal change in the amount of solar radiation (ASUN) in a site (210) where a power supply system (1a) is installed and a temporal change in the power consumption (PL) of a power load (5), a temporal change in the generated power (PPV) of a solar power generation facility (10) is determined. On the basis of the temporal change in the power consumption (PL) and the temporal change in the generated power (PPV), a temporal change in the generated power (PFC) of a fuel cell facility (20) is determined. On the basis of the temporal change in the power consumption (PL), the temporal change in the generated power (PPV), and the temporal change in the generated power (PFC), a temporal change in the charge / discharge power (PSB) of a storage battery facility (30) is determined.

Description

Simulation method, computer program, and simulation device for power supply system

[0001] The present disclosure relates to a method, a computer program, and a simulation device for simulating a power supply system.

[0002] Patent Document 1 discloses a stand-alone distributed power source that includes a solar power generation system, a fuel cell system, and a storage battery. Patent Document 1 also describes that it provides a method for operating the fuel cell system with high power generation efficiency.

[0003] JP 2015-164380 A

[0004] The present disclosure provides a technique suitable for determining a power supply system that is suited to the amount of solar radiation and the power consumption of a power load.

[0005] The present disclosure provides a simulation method for a power supply system, wherein the power supply system includes a solar power generation facility, a fuel cell facility, and a storage battery facility, and the power supply system supplies power to a power load, the simulation method including: determining a change over time in a first generated power of the solar power generation facility based on a change over time in the amount of solar radiation at a site where the power supply system is installed and a change over time in the power consumption of the power load; determining a change over time in a second generated power of the fuel cell facility based on the change over time in the power consumption and the change over time in the first generated power; and determining a change over time in the charge / discharge power of the storage battery facility based on the change over time in the power consumption, the change over time in the first generated power, and the change over time in the second generated power.

[0006] In another aspect, the present disclosure provides a simulation device for simulating a power supply system, wherein the power supply system includes a solar power generation facility, a fuel cell facility, and a storage battery facility, and the power supply system supplies power to a power load, the simulation device comprising: a first power determination unit that determines a change over time in a first generated power of the solar power generation facility based on a change over time in solar radiation at a site where the power supply system is installed and a change over time in power consumption of the power load; a second power determination unit that determines a change over time in a second generated power of the fuel cell facility based on the change over time in the power consumption and the change over time in the first generated power; and a third power determination unit that determines a change over time in charge / discharge power of the storage battery facility based on the change over time in the power consumption, the change over time in the first generated power, and the change over time in the second generated power.

[0007] The technology disclosed herein is suitable for determining a power supply system that is suited to the amount of solar radiation and the power consumption of a power load.

[0008] FIG. 1 is a configuration diagram of an example power supply system. FIG. 2 is a functional block diagram of a simulation device according to an embodiment. FIG. 3 is a flowchart showing the flow of proposing the introduction of a power supply system according to an embodiment. FIG. 4 is an explanatory diagram of the operation of the simulation device according to an embodiment. FIG. 5 is an explanatory diagram of the calculated change over time in the power generated by a photovoltaic power generation facility, in a case where the constraints imposed on the magnitude of the power generated are lenient. FIG. 6 is an explanatory diagram of the calculated change over time in the power generated by a photovoltaic power generation facility, in a case where the constraints imposed on the magnitude of the power generated are strict. FIG. 7 is an example of a time series graph showing the change over time in the power consumption of a power load, the power generated by a photovoltaic power generation facility, the power generated by a fuel cell facility, and the charging and discharging power of a storage battery facility.

[0009] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of already well-known matters or redundant description of substantially the same configuration may be omitted.

[0010] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims.

[0011] (Embodiment) Hereinafter, an embodiment will be described with reference to Figs.

[0012] [1-1. Configuration] In the embodiment, the introduction of a power supply system is proposed. The power supply system can be introduced into a facility such as a factory. An example of an introduced and operated power supply system will be described below with reference to FIG. 1. Then, the proposal for introduction will be described with reference to FIGS. 2 to 7.

[0013] 1 is a configuration diagram of an example of a power supply system 1a. The power supply system 1a is connected to a commercial power source 2. The power supply system 1a supplies power to a power load 5. The power supply system 1a is connected to an EMS (Energy Management System) server 52 via a network 60.

[0014] The power supply system 1a is a distributed power supply system and includes a solar power generation system 10, a fuel cell system 20, a storage battery system 30, a control device 50a, an electrical circuit 70, a distribution board 4, and current sensors 3a and 3b. The current sensors 3a and 3b are, for example, current transformers.

[0015] The solar power generation facility 10 includes a solar power generation module 11, a DC-DC converter 12, and a DC-AC inverter 13. The solar power generation module 11 is also called a solar power generation panel. DC power generated by the solar power generation module 11 is converted into DC power of a different voltage by the DC-DC converter 12. The converted DC power is then converted into AC power by the DC-AC inverter 13. The AC power is supplied to an electric circuit 70.

[0016] The fuel cell equipment 20 includes a fuel cell system 20a, a fuel cell system 20b, and a fuel cell system 20c. Each of the fuel cell system 20a, the fuel cell system 20b, and the fuel cell system 20c is, for example, a polymer electrolyte fuel cell (PEFC) system, a solid oxide fuel cell (SOFC) system, or the like.

[0017] The fuel cell system 20a includes a fuel cell stack 21a, a DCDC converter 22a, and a DC / AC inverter 23a. DC power generated by the fuel cell stack 21a is converted into DC power of a different voltage by the DCDC converter 22a. The converted DC power is then converted into AC power by the DC / AC inverter 23a. The AC power is supplied to an electric circuit 70.

[0018] The fuel cell system 20b includes a fuel cell stack 21b, a DCDC converter 22b, and a DC / AC inverter 23b. DC power generated by the fuel cell stack 21b is converted into DC power of a different voltage by the DCDC converter 22b. The converted DC power is then converted into AC power by the DC / AC inverter 23b. The AC power is supplied to an electric circuit 70.

[0019] The fuel cell system 20c includes a fuel cell stack 21c, a DCDC converter 22c, and a DC / AC inverter 23c. The DC power generated by the fuel cell stack 21c is converted into DC power of a different voltage by the DCDC converter 22c. The converted DC power is then converted into AC power by the DC / AC inverter 23c. The AC power is supplied to an electric circuit 70.

[0020] The battery equipment 30 includes a battery module 31a, a battery module 31b, a battery module 31c, a bidirectional DC-DC converter 32a, a bidirectional DC-DC converter 32b, a bidirectional DC-DC converter 32c, and a DC-AC inverter 33. The battery module 31a, the battery module 31b, and the battery module 31c are, for example, a lithium-ion battery module, a nickel-metal hydride battery module, a lead-acid battery module, or the like.

[0021] The power discharged from the storage battery module 31a is converted into DC power having a different voltage by the bidirectional DC-DC converter 32a. The converted DC power is then converted into AC power by the DC-AC inverter 33. The AC power is supplied to the electric circuit 70.

[0022] The AC power supplied from the electric circuit 70 to the DC-AC inverter 33 is converted into DC power. This DC power is then converted into DC power of a different voltage by the bidirectional DC-DC converter 32a. The converted DC power is used to charge the storage battery module 31a.

[0023] The power discharged from the storage battery module 31b is converted into DC power having a different voltage by the bidirectional DC-DC converter 32b. The converted DC power is then converted into AC power by the DC-AC inverter 33. The AC power is supplied to the electric circuit 70.

[0024] The AC power supplied from the electric circuit 70 to the DC-AC inverter 33 is converted into DC power. This DC power is then converted into DC power of a different voltage by the bidirectional DC-DC converter 32b. The converted DC power is used to charge the storage battery module 31b.

[0025] The power discharged from the storage battery module 31c is converted into DC power having a different voltage by the bidirectional DC-DC converter 32c. The converted DC power is then converted into AC power by the DC-AC inverter 33. The AC power is supplied to the electric circuit 70.

[0026] The AC power supplied from the electric circuit 70 to the DC-AC inverter 33 is converted into DC power. This DC power is then converted into DC power of a different voltage by the bidirectional DC-DC converter 32c. The converted DC power is used to charge the storage battery module 31c.

[0027] Power can flow from the electric circuit 70 to the commercial power supply 2. Power can flow from the commercial power supply 2 to the electric circuit 70. The current sensor 3a detects the current flowing between the electric circuit 70 and the commercial power supply 2. The control device 50a monitors the current detection value of the current sensor 3a, thereby allowing the power flowing from the commercial power supply 2 to the power supply system 1a or the power flowing from the power supply system 1a to the commercial power supply 2 to follow a target power (e.g., 0 W).

[0028] Hereinafter, the terms reverse flow power and forward flow power may be used. Reverse flow power is power that flows from the power supply system 1a to the commercial power source 2, and more specifically, power that flows from the electrical circuit 70 to the commercial power source 2. Forward flow power is power that flows from the commercial power source 2 to the power supply system 1a, and more specifically, power that flows from the commercial power source 2 to the electrical circuit 70.

[0029] Electric power can flow from the electric circuit 70 to the electric load 5 via the distribution board 4. The current sensor 3b detects the current flowing through the electric load 5.

[0030] The storage battery equipment 30 includes a control device 50b. The solar power generation equipment 10 includes a control device 50c. The fuel cell system 20a includes a control device 50d1. The fuel cell system 20b includes a control device 50d2. The fuel cell system 20c includes a control device 50d3.

[0031] The EMS server 52 may be a cloud server or an on-premise server. The network 60 may be a wired network or a wireless network. The network 60 is typically the Internet.

[0032] The control device 50a communicates with the current sensor 3a, the current sensor 3b, the control device 50b, the control device 50c, the control device 50d1, the control device 50d2, and the control device 50d3. The control device 50a also communicates with the EMS server 52 via the network 60. Through these communications, the control device 50a generates control signals for controlling the control devices 50b, the control device 50c, the control device 50d1, the control device 50d2, and the control device 50d3.

[0033] The control device 50b receives a control signal from the control device 50a. The control device 50b controls the bidirectional DC-DC converter 32a, the bidirectional DC-DC converter 32b, the bidirectional DC-DC converter 32c, and the DC-AC inverter 33 based on the control signal. By controlling the bidirectional DC-DC converter 32a, it is possible to control whether the storage battery module 31a is charged, in standby mode, or discharged. By controlling the bidirectional DC-DC converter 32b, it is possible to control whether the storage battery module 31b is charged, in standby mode, or discharged. By controlling the bidirectional DC-DC converter 32c, it is possible to control whether the storage battery module 31c is charged, in standby mode, or discharged. By controlling the DC-AC inverter 33, power conversion between direct current and alternating current is performed. Through these controls, the power flowing between the storage battery equipment 30 and the electrical circuit 70 is controlled.

[0034] Specifically, the bidirectional DC-DC converter 32a is controlled to control the charge / discharge power of the storage battery module 31a, the bidirectional DC-DC converter 32b is controlled to control the charge / discharge power of the storage battery module 31b, and the bidirectional DC-DC converter 32c is controlled to control the charge / discharge power of the storage battery module 31c.

[0035] In the illustrated example, charging and discharging of the storage battery module 31a is controlled by controlling the inter-terminal voltage V1 of the bidirectional DC-DC converter 32a relative to the inter-terminal voltage V2 of the DC-AC inverter 33. Charging and discharging of the storage battery module 31b is controlled by controlling the inter-terminal voltage V1 of the bidirectional DC-DC converter 32b relative to the inter-terminal voltage V2 of the DC-AC inverter 33. Charging and discharging of the storage battery module 31c is controlled by controlling the inter-terminal voltage V1 of the bidirectional DC-DC converter 32c relative to the inter-terminal voltage V2 of the DC-AC inverter 33.

[0036] The control device 50c receives a control signal from the control device 50a. The control device 50c controls the DCDC converter 12 and the DC-AC inverter 13 based on the control signal. By controlling the DCDC converter 12, the output voltage of the photovoltaic power generation module 11 is adjusted. By controlling the DC-AC inverter 13, power conversion between direct current and alternating current is performed. Through these controls, power is extracted from the photovoltaic power generation facility 10 to the electric circuit 70.

[0037] The control device 50d1 receives a control signal from the control device 50a. The control device 50d1 controls the DCDC converter 22a and the DC-AC inverter 23a based on the control signal. By controlling the DCDC converter 22a, the output voltage of the fuel cell stack 21a is adjusted. By controlling the DC-AC inverter 23a, power conversion between direct current and alternating current is performed. Through these controls, power is extracted from the fuel cell system 20a to the electrical circuit 70.

[0038] The control device 50d2 receives a control signal from the control device 50a. The control device 50d2 controls the DCDC converter 22b and the DC-AC inverter 23b based on the control signal. By controlling the DCDC converter 22b, the output voltage of the fuel cell stack 21b is adjusted. By controlling the DC-AC inverter 23b, power conversion between DC and AC is performed. Through these controls, power is extracted from the fuel cell system 20b to the electrical circuit 70.

[0039] The control device 50d3 receives a control signal from the control device 50a. The control device 50d3 controls the DCDC converter 22c and the DC-AC inverter 23c based on the control signal. By controlling the DCDC converter 22c, the output voltage of the fuel cell stack 21c is adjusted. By controlling the DC-AC inverter 23c, power conversion between DC and AC is performed. Through these controls, power is extracted from the fuel cell system 20c to the electrical circuit 70.

[0040] In the embodiment, green hydrogen is used as fuel in the fuel cell equipment 20. Green hydrogen is hydrogen produced by electrolyzing water using renewable energy. Therefore, using the fuel cell equipment 20 to supply power to the power load 5 can increase the proportion of electricity derived from renewable energy in the power consumption of the power load 5. This can also reduce carbon dioxide emissions resulting from power supply to the power load 5. Renewable energy is, for example, energy derived from solar, wind, geothermal, hydroelectric, biomass, etc.

[0041] In contrast, in the embodiment, the commercial power source 2 includes a thermal power plant that generates power using fossil fuels such as oil and coal. The cost of generating power using fossil fuels is low. Therefore, using the commercial power source 2 to supply power to the power load 5 can reduce the cost required to supply power to the power load 5. However, when generating power using fossil fuels, carbon dioxide emissions cannot be avoided.

[0042] For these reasons, in the embodiment, supplying power from the fuel cell equipment 20 to the power load 5 is advantageous from the standpoint of improving environmental friendliness compared to supplying power from the commercial power source 2 to the power load 5. On the other hand, supplying power from the commercial power source 2 to the power load 5 is advantageous from the standpoint of improving economic efficiency compared to supplying power from the fuel cell equipment 20 to the power load 5.

[0043] In this embodiment, the power generated by the fuel cell equipment 20 is controlled by controlling the number of fuel cell systems in operation. This example is advantageous from the viewpoint of improving the responsiveness of the control of the power generated by the fuel cell equipment 20.

[0044] The control period of the storage battery equipment 30 is shorter than the control period of the fuel cell equipment 20. Therefore, the charge / discharge power of the storage battery equipment 30 is easier to follow fluctuations in the power generated by the solar power generation equipment 10 and / or fluctuations in the power consumption of the power load 5 than the power generated by the fuel cell equipment 20. Specifically, the control period of the storage battery equipment 30 is shorter than the control period of the fuel cell system 20a, shorter than the control period of the fuel cell system 20b, and shorter than the control period of the fuel cell system 20c. For example, the control period of the storage battery equipment 30 is 1 / 50 to 1 / 5 of the control period of the fuel cell equipment 20, the fuel cell system 20a, the fuel cell system 20b, and / or the fuel cell system 20c. Note that the charge / discharge power refers to either charge power or discharge power. A positive charge / discharge power refers to discharge power, and a negative absolute value of the charge / discharge power refers to charge power.

[0045] 1, the number of photovoltaic power generation modules in the photovoltaic power generation facility 10 is one. However, the number of photovoltaic power generation modules may be two, three, four or more. As can be understood from the above description, the number of photovoltaic power generation modules may also be referred to as the number of photovoltaic power generation panels.

[0046] In the example of Fig. 1, the number of fuel cell systems in the fuel cell equipment 20 is three. However, the number of fuel cell systems may be one, two, four or more. Typically, one fuel cell system is a unit system partitioned by a housing. Typically, one fuel cell system has one fuel cell stack.

[0047] 1 , the number of storage battery modules in the storage battery equipment 30 is three. However, the number of storage battery modules may be one, two, or four or more. Typically, one storage battery module is a unit module partitioned by a housing.

[0048] Hereinafter, the proposal for introducing the power supply system 1a will be described with reference to FIGS.

[0049] 2 is a functional block diagram of the simulation device 100 according to the embodiment. The simulation device 100 can support the proposal for introducing the power supply system 1a.

[0050] The simulation device 100 is, for example, a personal computer, a smartphone, a tablet, a mobile phone, a personal digital assistant (PDA), etc. The simulation device 100 includes an input unit 110, a recording medium 120, a processor 130, a display unit 140, and a communication device 150.

[0051] The input unit 110 receives input of information. The input unit 110 is, for example, a user interface. The user interface includes, for example, at least one selected from the group consisting of an operation button, a keyboard, a mouse, and a touch panel.

[0052] The recording medium 120 records information. The recording medium 120 is, for example, a semiconductor recording medium, a magnetic recording medium, a magneto-optical recording medium, an optical recording medium, or the like. Examples of semiconductor recording media include a Secure Digital (SD) card, a Universal Serial Bus (USB) memory, and a Solid State Drive (SSD). Examples of magnetic recording media include a Hard Disk Drive (HDD) and a flexible disk. Examples of magneto-optical recording media include a Magneto Optical Disk (MO). Examples of optical recording media include a Compact Disc (CD) and a Digital Versatile Disc (DVD).

[0053] The processor 130 performs information processing such as calculations. The processor 130 is, for example, a central processing unit (CPU), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA). The processor 130 includes a power determination unit 131, an equipment determination unit 132, an index evaluation unit 133, and a cost determination unit 134. The power determination unit 131 includes a first power determination unit 131a, a second power determination unit 131b, and a third power determination unit 131c. The equipment determination unit 132 includes a first equipment determination unit 132a, a second equipment determination unit 132b, and a third equipment determination unit 132c.

[0054] The display unit 140 is, for example, a liquid crystal display, an organic electroluminescence display, etc. A touch panel may serve as both the input unit 110 and the display unit 140.

[0055] The communicator 150 transmits and receives information and includes a transmitter and a receiver.

[0056] 2, a facility 200 is built on a site 210. The site 210 and / or the facility 200 is owned by an owner 201. A user 101 uses the simulation device 100 to propose to the owner 201 that the power supply system 1a be introduced into the facility 200. The user 101 is, for example, a business person. The facility 200 is, for example, a factory.

[0057] FIG. 3 is a flowchart showing a flow of proposing the introduction of the power supply system 1a according to the embodiment.

[0058] In step S101, the user 101 inputs site information and required power information to the simulation device 100 via the input unit 110. In step S102, the user 101 performs a simulation of the power supply system 1a using the simulation device 100. In step S103, the user 101 displays the simulation results on the display unit 140. In step S104, the user 101 presents the simulation results to the owner 201 and proposes to the owner 201 that the power supply system 1a be introduced into the facility 200.

[0059] The site information includes location information of the site 210. The location information is correlated with changes in the amount of solar radiation on the site 210 over time. The amount of solar radiation is the amount of radiant energy that a unit area receives from the sun per unit time. The location information is information that represents the locations on the site 210 where one or more photovoltaic power generation modules 11 are installed. In the embodiment, the location information includes the altitude, longitude, and latitude of the site 210.

[0060] Here, the expression "a position on the site 210 where one or more photovoltaic power generation modules 11 are installed" will be explained. This expression is intended to encompass the case where the position where one or more photovoltaic power generation modules 11 are installed is the ground of the site 210. This expression is also intended to encompass the case where the position where one or more photovoltaic power generation modules 11 are installed is a facility 200 provided on the site 210. For example, this position may be the roof of the facility 200.

[0061] The site information includes constraint information. The constraint information represents constraints imposed on the amount of power generated by the solar power generation facility 10. In the embodiment, the constraint information includes information on the size of the site 210, the shape of the site 210, and obstacles that block sunlight from reaching the site 210.

[0062] The size of the site 210 is, for example, the area of ​​an area in which one or more photovoltaic power generation modules 11 can be installed. The size of the site 210 can also be, for example, the area of ​​the site 210 when viewed vertically from above. When the size is large, it is easy to install the photovoltaic power generation modules 11, and the power generated by the photovoltaic power generation facility 10 is likely to be large. On the other hand, when the size is small, it is difficult to install the photovoltaic power generation modules 11, and the power generated by the photovoltaic power generation facility 10 is likely to be small.

[0063] The shape of the site 210 is, for example, the shape of an area in which one or more photovoltaic power generation modules 11 can be installed. The shape of the site 210 can also be, for example, the shape of the site 210 when viewed vertically from above. For example, if the shape is rectangular, it is easy to install the photovoltaic power generation modules 11, and the power generated by the photovoltaic power generation facility 10 is likely to be large. On the other hand, if the shape is irregular, it is difficult to install the photovoltaic power generation modules 11, and the power generated by the photovoltaic power generation facility 10 is likely to be small.

[0064] An obstacle that blocks sunlight from reaching the site 210 may reduce the power generation capacity of the solar power generation facility 10. Examples of the obstacle include a building, a tree, etc. The information about the obstacle may include information about the height of the obstacle.

[0065] The required power information represents a change over time in the power consumption of the power load 5. Specifically, this change over time is a change over time in the planned power consumption of the power load 5, and is based on the planned use of the power load 5. In the embodiment, the change over time is discrete data at regular time intervals. This point can be applied not only to the power consumption of the power load 5, but also to other types of change over time. In one specific example, the change over time in the power consumption of the power load 5 is discrete data at regular time intervals of 30 seconds or more and 1 hour or less.

[0066] 4 is a diagram illustrating the operation of the simulation device 100 according to the embodiment. The operation of the simulation device 100 will be described below with reference to FIG. 4. In the following description, ＰＶ indicates the power generated by the solar power generation facility 10. ＦＣ indicates the power generated by the fuel cell equipment 20. Charging and discharging power P ＳＢindicates the charging and discharging power of the battery storage equipment 30. Power consumption P Ｌ indicates the power consumption of the power load 5. ＳＵＮ indicates the amount of solar radiation at the site 210. Forward flow power P ＦＯＲ is the power flowing from the commercial power source 2 to the power supply system 1a, and specifically refers to the power flowing from the commercial power source 2 to the electric circuit 70. ＲＥＶ is the power flowing from the power supply system 1 a to the commercial power source 2 , and specifically refers to the power flowing from the electric circuit 70 to the commercial power source 2 .

[0067] The simulation according to the example of FIG. ＰＶ , generated power P ＦＣ and charging / discharging power P ＳＢ The sum of the power consumption P Ｌ and the forward flow power P ＦＯＲ is set to zero, and the reverse flow power P ＲＥＶ This simulation is based on the assumption that the power supply system 1a is controlled with the goal of making the following equations 1, 2, and 3 true:

[0068] However, strictly speaking, in the simulation, there may be periods when the formulas 1, 2, and 3 do not hold. This is because the control periods of the fuel cell equipment 20 and the storage battery equipment 30 take non-zero values, and therefore the generated power P ＰＶ Fluctuations in and / or power consumption P Ｌ The fluctuation of the generated power P ＦＣ and charging / discharging power P ＳＢ This is because the demand cannot be completely absorbed by the control of the demand. For this reason, it is meaningful to calculate the demand following rate DFR, the renewable energy rate RER, and the surplus power rate SPR in the simulation.

[0069] Strictly speaking, in the simulation, the power consumption P Ｌ is the generated power P ＰＶ , generated power P ＦＣ and charging / discharging power P ＳＢIn a period greater than the sum of Ｌ is the generated power P ＰＶ , generated power P ＦＣ , charging / discharging power P ＳＢ and forward flow power P ＦＯＲ In other words, during this period, the following equation 4 holds: On the other hand, in the simulation, the power consumption P Ｌ is the generated power P ＰＶ , generated power P ＦＣ and charging / discharging power P ＳＢ In a period smaller than the sum of Ｌ and reverse flow power P ＲＥＶ The total of the generated power P ＰＶ , generated power P ＦＣ and charging / discharging power P ＳＢ That is, during this period, the following formula 5 holds true:

[0070] 4, the input unit 110 receives site information, which is then input to the simulation device 100 and recorded on the recording medium 120.

[0071] In step S202, the input unit 110 receives the required power information, which is then input to the simulation device 100 and recorded on the recording medium 120.

[0072] After steps S201 and S202, in step S203, the first power determination unit 131a determines the generated power P ＰＶ The change over time is calculated.

[0073] As described above, the site information includes the location information of the site 210. The constraint information includes the power generation P ＰＶ In the embodiment, in step S203, the first power determiner 131a determines the amount of solar radiation A ＳＵＮ Then, the first power determiner 131a determines the change over time of the amount of solar radiation A ＳＵＮ The time-dependent change of P ＬBased on the time-dependent change of the generated power P ＰＶ The change over time is calculated.

[0074] Specifically, the recording medium 120 stores the location information of the site 210 and the amount of solar radiation A ＳＵＮ The first power determination unit 131a determines the amount of solar radiation A based on the position information and the table data. ＳＵＮ Determine the change over time.

[0075] Generally speaking, the amount of solar radiation A ＳＵＮ The power generation P ＰＶ The shape of the change over time of the power consumption P is specified. Specifically, the shape is a graph with the horizontal axis as the time axis and the vertical axis as the power axis, as shown in Figs. 5 and 6. Ｌ Based on the change over time of ＰＶ The power level of the time-varying signal is defined.

[0076] 5 and 6 show the calculated generated power P ＰＶ 5 and 6, the horizontal axis represents time, and the vertical axis represents power. Ｌ Changes over time and generated power P ＰＶ The change over time of power consumption P Ｌ The change over time of power consumption P is known in step S203 because it is represented by the required power information input in step S202. Ｌ In the change over time of power consumption P Ｌ is the time t Ｐ The local maximum value LM is the maximum value in the examples of FIGS.

[0077] As described above, the constraint information is the power generation power P ＰＶ 5 shows the case where the constraint is loose and the magnitude of Ｐ Power consumption P Ｌ (i.e., the maximum value LM) is the generated power P ＰＶ In contrast, FIG. 6 shows a case where the constraint is strict and the ＰPower consumption P Ｌ Generated power P ＰＶ This applies when the cost cannot be covered by the government alone.

[0078] In the example of FIG. Ｐ The generated power P ＰＶ is the power consumption P Ｌ As described above, the generated power P ＰＶ In one example of a numerical value, in the example of FIG. Ｐ The generated power P ＰＶ is the power consumption P Ｌ The generated power P is set to be between 1 and 1.5 times the ＰＶ On the other hand, in the example of FIG. 6, the power generation P ＰＶ The generated power P ＰＶ The change over time is calculated.

[0079] Time t Ｐ The generated power P ＰＶ is the power consumption P Ｌ The generated power P ＰＶ In this case, the time variation of Ｐ Power consumption P Ｌ A part of the energy consumption can be supplied by, for example, the fuel cell system 20. Ｐ The generated power P ＰＶ is the power consumption P Ｌ The generated power P ＰＶ The change over time of can be calculated.

[0080] After step S203, in step S204, the second power determination unit 131b determines the power consumption P Ｌ Changes over time and generated power P ＰＶ Based on the time-dependent change of the generated power P ＦＣ Specifically, the second power determination unit 131b calculates the change over time of the power consumption P Ｌ From the change over time, the generated power P ＰＶ By subtracting the change over time in power consumption P Ｌ and generated power P ＰＶThen, the second power determination unit 131b calculates the change over time of the first difference between the power generation amount P ＦＣ More specifically, the second power determination unit 131b calculates the change over time of the generated power P ＦＣ The generated power P ＦＣ The change over time is calculated.

[0081] After step S204, in step S205, the third power determination unit 131c determines the power consumption P Ｌ Changes over time and generated power P ＰＶ Changes over time and generated power P ＦＣ Based on the change over time of ＳＢ Specifically, the third power determination unit 131c calculates the change over time of the first difference P ＦＣ By subtracting the change over time of ＦＣ The third power determination unit 131c calculates the change over time of the second difference between the charging and discharging power P ＳＢ More specifically, the third power determination unit 131c calculates the change over time of the charge / discharge power P ＳＢ The charge / discharge power P ＳＢ The change over time is calculated.

[0082] Steps S204 and S205 will be further described. As described above, the control period of the storage battery equipment 30 is shorter than the control period of the fuel cell equipment 20. The generated power P calculated in step S204 ＦＣ The change over time of the first difference follows the change over time of the first difference in a relatively long control period. This means that the first difference and the generated power P ＦＣ However, in the intermediate period between adjacent control points, the first difference and the generated power P ＦＣ This means that there may be a discrepancy between the charge / discharge power P calculated in step S205 and the charge / discharge power P ＳＢThis means that the difference between the charge / discharge power P ＳＢ In this way, the control of the power supply system 1a is simulated with the aim of satisfying the formulas 1, 2, and 3.

[0083] FIG. 7 shows the power consumption P Ｌ , generated power P ＰＶ , generated power P ＦＣ and charging / discharging power P ＳＢ 7 is an example of a time series graph showing the change over time of the power consumption in the power consumption of a certain day. In FIG. 7, the horizontal axis represents time, and the vertical axis represents power consumption. FIG. 7 shows the change over time of the power consumption in the power consumption of a certain day.

[0084] As described above, the control period of the storage battery equipment 30 is shorter than the control period of the fuel cell equipment 20. The time series graph in Figure 7 reflects the magnitude relationship between the control period of the storage battery equipment 30 and the control period of the fuel cell equipment 20. Specifically, in the period from midnight to 6:00 and the period from 18:00 to 24:00, the generated power P ＰＶ is zero. In these periods, the first difference is the power consumption P Ｌ During these periods, the generated power P ＦＣ The change over time is the power consumption P Ｌ In these periods, the second difference follows the change over time of the power consumption P Ｌ Generated power P ＦＣ During these periods, the charge / discharge power P ＳＢ The change over time of follows the change over time of this difference in a relatively small control cycle.

[0085] After step S203, in step S206, the first facility determination unit 132a determines the power generation power P ＰＶ Based on the change over time in the rated power generation capacity of the solar power generation facility 10 (hereinafter referred to as the first rated power generation capacity P Ｒ１ ) and the number of photovoltaic power generation modules in the photovoltaic power generation facility 10 (hereinafter referred to as the first number N １ ) and are calculated. Specifically, the generated power P ＰＶ The power generation PＰＶ The maximum value P ＰＶＭＡＸ The larger the first rated power generation power P Ｒ１ and the first number N １ becomes larger. N １ is a natural number greater than or equal to 1.

[0086] More specifically, the first facility determination unit 132a calculates the maximum value P ＰＶＭＡＸ is the unit power P ＰＶＵＮＩＴ The value obtained by this calculation is the first number N １ The first rated power generation P Ｒ１ is the unit power P ＰＶＵＮＩＴ The first number N １ That is, the first number N １ is calculated by the following formula 6, and the first rated power generation P Ｒ１ is calculated by the following formula 7. In formulas 6, 8 and 10, "roundup" is a function that rounds up to the nearest whole number. ＰＶＵＮＩＴ is the rated power generation power of one solar power generation module.

[0087] After step S204, in step S207, the second facility determination unit 132b determines the power generation power P ＦＣ Based on the change over time in the rated power generation capacity of the fuel cell equipment 20 (hereinafter referred to as the second rated power generation capacity P Ｒ２ ), and the number of fuel cell systems in the fuel cell facility 20 (hereinafter referred to as the second number N ２ ) and are calculated. Specifically, the generated power P ＦＣ The power generation P ＦＣ The maximum value P ＦＣＭＡＸ The larger the second rated power generation power P Ｒ２ and the second number N ２ becomes larger. N ２ is a natural number greater than or equal to 1.

[0088] More specifically, the second facility determination unit 132b calculates the maximum value P ＦＣＭＡＸ is the unit power P ＦＣＵＮＩＴ The value obtained by this calculation is the second number N ２The second rated power generation P Ｒ２ is the unit power P ＦＣＵＮＩＴ The second number N ２ That is, the second number N ２ is calculated by the following formula 8, and the second rated power generation P Ｒ２ is calculated by the following equation 9: ＦＣＵＮＩＴ is the rated power generation capacity of one fuel cell system.

[0089] After step S205, in step S208, the third facility determination unit 132c determines the charging / discharging power P ＳＢ Based on the change over time, the rated charge / discharge power P Ｒ３ and the number of storage battery modules in the storage battery equipment 30 (hereinafter referred to as the third number N ３ ) and are calculated. Specifically, the charge and discharge power P ＳＢ Charge and discharge power P ＳＢ The maximum value P ＳＢＭＡＸ The larger the calculated rated charge / discharge power P Ｒ３ and the third number N ３ becomes larger. N ３ is a natural number greater than or equal to 1.

[0090] Here, the maximum value of charge / discharge power is the same if the maximum value of charge power and the maximum value of discharge power are the same value. If the maximum value of charge / discharge power is different, the maximum value of charge / discharge power is the larger of the maximum value of charge / discharge power. If the rated charge / discharge power is the same value, the rated charge / discharge power is the same value. If the rated charge / discharge power is different, the rated charge / discharge power is the larger of the rated charge / discharge power.

[0091] More specifically, the third facility determination unit 132c determines the maximum value P ＳＢＭＡＸ is the unit power P ＳＢＵＮＩＴ The value obtained by this calculation is the third number N ３ Rated charge / discharge power P Ｒ３ is the unit power P ＳＢＵＮＩＴ The third number N ３That is, the third number N ３ is calculated by the following formula 10, and the rated charge / discharge power P Ｒ３ is calculated by the following equation 11: ＳＢＵＮＩＴ is the rated charge / discharge power of one battery module.

[0092] After steps S203, S204, and S205, in step S209, the index evaluation unit 133 calculates a change over time in at least one index. The at least one index includes at least one selected from the group consisting of: a demand following rate DFR in the power supply system 1a, a renewable energy rate RER in the power supply system 1a, and a surplus power rate SPR in the power supply system 1a.

[0093] The demand following rate DFR is the forward flow power P ＦＯＲ When is greater than zero, the power consumption P Ｌ Forward flow power P ＦＯＲ The difference after subtracting the power consumption P Ｌ The demand following rate DFR is calculated by dividing the forward flow power P ＦＯＲ and reverse flow power P ＲＥＶ When is zero, it is 1 (100% in percentage notation). The demand following ratio DFR is ＲＥＶ When is greater than zero, the power consumption P Ｌ Reverse flow power P ＲＥＶ The difference after subtracting the power consumption P Ｌ That is, the demand following rate DFR is calculated by the following formula 12.

[0094] The renewable energy ratio RER is the forward flow power P ＦＯＲ When is greater than zero, the power consumption P Ｌ Forward flow power P ＦＯＲ The difference after subtracting the power consumption P Ｌ The renewable energy ratio RER is calculated by dividing the forward flow power P ＦＯＲ and reverse flow power P ＲＥＶis zero, the renewable energy ratio RER is 1. ＲＥＶ is greater than zero, the renewable energy ratio RER is 1. That is, the renewable energy ratio RER is calculated by the following Equation 13.

[0095] The surplus power rate SPR is the forward flow power P ＦＯＲ is greater than zero, the surplus power rate SPR is 0 (0% in percentage notation). ＦＯＲ and reverse flow power P ＲＥＶ is zero. The surplus power rate SPR is the reverse flow power P ＲＥＶ When is greater than zero, the reverse flow power P ＲＥＶ Power consumption P Ｌ That is, the surplus power rate SPR is calculated by the following formula 14.

[0096] For example, the power consumption P Ｌ is 100W, and the forward flow power P ＦＯＲ and reverse flow power P ＲＥＶ In this case, the demand following rate DFR is 1, the renewable energy rate RER is 1, and the surplus power rate SPR is 0. Ｌ is 100W, and the forward flow power P ＦＯＲ In this case, the demand following rate DFR is 0.8, the renewable energy rate RER is 0.8, and the surplus power rate SPR is 0. In addition, for example, the power consumption P Ｌ is 100W, and the reverse flow power P ＲＥＶ Consider the case where the demand following rate DFR is 0.8, the renewable energy rate RER is 1, and the surplus power rate SPR is 0.2.

[0097] After steps S206, S207, and S208, in step S210, the cost determination unit 134 determines the first number N １ and the second number N ２ and the third number N ３In the embodiment, the system cost of the power supply system 1a is the price of the power supply system 1a itself, and does not include the cost of constructing the power supply system 1a, the cost of fuel required to operate the power supply system 1a, etc.

[0098] Specifically, in step S210, the cost determination unit 134 determines the first number N １ The cost determination unit 134 calculates the price of the photovoltaic power generation facility 10 based on the second number N ２ The cost determination unit 134 calculates the price of the fuel cell equipment 20 based on the third number N ３ The cost determination unit 134 calculates the price of the storage battery equipment 30 based on the first number N. The cost determination unit 134 calculates the system cost, i.e., the price, of the power supply system 1a so as to include the price of the photovoltaic power generation equipment 10, the price of the fuel cell equipment 20, and the price of the storage battery equipment 30. The system cost of the power supply system 1a can be the sum of the price of the photovoltaic power generation equipment 10, the price of the fuel cell equipment 20, and the price of the storage battery equipment 30. Typically, the first number N １ The larger the second number N is, the higher the price of the photovoltaic power generation facility 10. ２ The larger the third number N, the higher the price of the fuel cell equipment 20. ３ The higher the number of batteries, the higher the price of the battery equipment 30.

[0099] After step S210, in step S211, the cost determination unit 134 calculates the total cost of the power supply system 1a. ＦＣ The cost determination unit 134 then calculates the hydrogen cost for the fuel cell equipment 20 based on the change over time in the generated power P. The cost determination unit 134 then calculates the sum of multiple costs including the system cost and the hydrogen cost. The total cost is this sum. In this embodiment, the sum is the sum of the system cost and the hydrogen cost. Therefore, the total cost is the sum of the system cost and the hydrogen cost. Specifically, the hydrogen cost is calculated by multiplying the generated power P by the ＰＶ This is the price of hydrogen that needs to be supplied as fuel to the fuel cell facility 20 when the fuel cell facility 20 is to generate power according to the change over time in the hydrogen consumption rate.

[0100] The simulation device 100 is configured to be able to display the simulation results on the display unit 140. The simulation results displayed on the display unit 140 include, for example, the following: ＰＶ Change over time in power generation P ＦＣ Change over time in charge / discharge power P ＳＢ Change over time in the first rated power generation power P Ｒ１ , ・Second rated power generation P Ｒ２ , ・Rated charge / discharge power P Ｒ３ , ・First number N １ , ・Second number N ２ , ・Third number N ３ - a system cost of the power supply system 1a; - a hydrogen cost for the fuel cell equipment 20; - a total cost including the system cost and the hydrogen cost; - a change over time in the demand following rate DFR in the power supply system 1a; - a change over time in the renewable energy rate RER in the power supply system 1a; and - a change over time in the surplus power rate SPR in the power supply system 1a.

[0101] The display of the simulation results on the display unit 140 can be a graph. A specific example of the graph display is the generated power P ＰＶ Change over time in power generation P ＦＣ Change over time, and charge / discharge power P ＳＢ This is the change over time.

[0102] The simulation device 100 is configured to be able to transmit the simulation results via the communication device 150. The simulation results can be displayed on the destination device.

[0103] In the simulation according to the embodiment, the rated power generation of one photovoltaic power generation module is a sufficiently small value. Ｒ１ The maximum value P calculated in step S203 ＰＶＭＡＸ In the actually constructed power supply system 1a, the deviation from the first number N １ The generated power P calculated in step S203 by the photovoltaic power generation moduleＰＶ The rated power generation power of one photovoltaic power generation module is, for example, 1 kW or more and 10 kW or less, and in one example, it is 5 kW.

[0104] In the simulation according to the embodiment, the rated power generation of one fuel cell system is a sufficiently small value. Ｒ２ The maximum value P calculated in step S204 ＦＣＭＡＸ In the power supply system 1a actually constructed, even under the condition that the power generated by the fuel cell equipment 20 is controlled by controlling the number of fuel cell systems in operation, the second number N ２ The generated power P calculated in S204 by the fuel cell system ＦＣ The rated power generation of one fuel cell system is, for example, 1 kW or more and 10 kW or less, and in one example, it is 5 kW.

[0105] In addition, the battery storage equipment 30 in the embodiment has a charging / discharging power P ＳＢ Therefore, in the actually constructed power supply system 1a, the third number N ３ The charge / discharge power P calculated in S205 by the battery module ＳＢ The time-dependent changes in the

[0106] The following describes techniques that can be applied to the above-described embodiments.

[0107] In the above-described embodiment, the generated power P ＦＣ is controlled by controlling the number of fuel cell systems in operation. ＦＣ may be controlled by controlling the magnitude of the power generated by the fuel cell system during operation.

[0108] In the above-described embodiment, the constraint information includes the size of the site 210, the shape of the site 210, and obstacles that block sunlight from reaching the site 210. The number of pieces of information in the constraint information may be one or more. Furthermore, the site information may not include any constraint information.

[0109] The site information may include information about at least one existing device on the site 210. The existing device is a device that actually already exists on the site 210. The at least one existing device can be incorporated into the power supply system 1a in the simulation.

[0110] For example, consider a case where at least one existing device includes X existing photovoltaic power generation modules, where X is a natural number equal to or greater than 1. In this example, the first equipment determination unit 132a determines N １ By subtracting X from the total number of solar modules to be added, N １ -X is calculated. The simulation result is １ It may contain -X.

[0111] Also, for example, consider a case where at least one existing device includes Y existing fuel cell systems, where Y is a natural number equal to or greater than 1. In this example, the second equipment determination unit 132b determines N ２ By subtracting Y from the total number of fuel cell systems to be added, N ２ -Y is calculated. The simulation result is ２ -Y may be included.

[0112] Also, for example, consider a case where at least one existing device includes Z existing storage battery modules, where Z is a natural number equal to or greater than 1. In this example, the third equipment determination unit 132c determines N ３ By subtracting Z from the number of battery modules to be added, N ３ -Z is calculated. The simulation results are ３ It may contain -Z.

[0113] In the above-described embodiment, the first power determiner 131a determines the amount of solar radiation A based on the position information and the table data representing the correspondence relationship. ＳＵＮThen, the first power determiner 131a determines the change over time of the amount of solar radiation A ＳＵＮ The time-dependent change of the power consumption P Ｌ Based on the time-dependent change of the generated power P ＰＶ The change over time is calculated.

[0114] In the first example, table data representing the correspondence relationship is stored in a server (not shown). The simulation device 100 transmits position information of the site 210 to the server. The server calculates the amount of solar radiation A at the site 210 based on the position information and the table data. ＳＵＮ The server determines the change over time in the amount of solar radiation A ＳＵＮ The time-dependent change in the amount of solar radiation A is transmitted to the simulation device 100. ＳＵＮ The first power determination unit 131a determines the amount of solar radiation A ＳＵＮ The time-dependent change of the power consumption P Ｌ Based on the time-dependent change of the generated power P ＰＶ The change over time is calculated.

[0115] In a second example, the input unit 110 receives from the user 101 the amount of solar radiation A ＳＵＮ The first power determination unit 131a receives the time-dependent change in the amount of solar radiation A ＳＵＮ The time-dependent change of the power consumption P Ｌ Based on the time-dependent change of the generated power P ＰＶ The change over time is calculated.

[0116] The simulation according to the embodiment described above is based on the assumption that the power supply system 1a is controlled so that the formulas 1, 2, and 3 are satisfied. In this way, the renewable energy ratio RER can be made to follow 1. However, this is not essential. The simulation is performed by controlling the forward flow power P ＦＯＲ It may be assumed that the power supply system 1a is controlled with the goal of setting ρ to a predetermined value greater than zero. In this way, a simulation result suitable for preventing reverse power flow can be obtained.

[0117] In steps S206 to S208 of the above-described embodiment, the first number N １ , second number N ２ , the third number N ３ , first rated power generation P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３ Calculate the first number N １ , second number N ２ and the third number N ３ is calculated, and the first rated power generation power P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３ It is also possible to adopt a configuration in which the above calculation is not performed.

[0118] In addition, the first number N １ , second number N ２ and the third number N ３ Without calculating the first rated power generation power P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３ In this case, for example, the first facility determination unit 132a may calculate the maximum value P ＰＶＭＡＸ to which of a plurality of power categories the power belongs, and a first rated power generation power P corresponding to the determined power category is determined. Ｒ１ Specifically, the storage medium 120 stores the power class and the first rated power generation power P corresponding to the class. Ｒ１ The first facility determination unit 132a has table data showing the correspondence relationship between the maximum value P ＰＶＭＡＸ The first rated power generation power P corresponding to the power category to which the Ｒ１ The second facility determination unit 132b can determine the maximum value P ＦＣＭＡＸ to which of a plurality of power categories the second rated power generation P belongs, and Ｒ２ Specifically, the storage medium 120 stores the power class and the second rated power generation P corresponding to the class. Ｒ２ The second facility determination unit 132b uses the table data to determine the maximum value P ＦＣＭＡＸThe second rated power generation P corresponding to the power category to which the Ｒ２ The third facility determination unit 132c can determine the maximum value P ＳＢＭＡＸ to which of a plurality of power categories the rated charge / discharge power P Ｒ３ Specifically, the recording medium 120 stores the power classification and the rated charge / discharge power P corresponding to the classification. Ｒ３ The third facility determination unit 132c has table data showing the correspondence relationship between the maximum value P ＳＢＭＡＸ The rated charge / discharge power P corresponding to the power category to which the Ｒ３ can be determined.

[0119] In step S210 of the above-described embodiment, the first number N １ , second number N ２ and the third number N ３ The system cost of the power supply system 1a is calculated based on the first rated power generation power P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３ In this case, the system cost of the power supply system 1a may be determined based on the first rated power generation power P Ｒ１ The larger the second rated power generation power P Ｒ２ The larger the rated charge / discharge power P Ｒ３ The larger the value, the higher the price of the battery equipment 30.

[0120] In addition, the first number N １ , second number N ２ , the third number N ３ , first rated power generation P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３ For example, the system cost of the power supply system 1a may be calculated based on the system cost calculated in step S210 and the first rated power generation P Ｒ１ , second rated power generation P Ｒ２ and rated charge / discharge power P Ｒ３The average of the system cost calculated as above based on the above may be treated as the system cost of the power supply system 1a. The average may be an arithmetic mean, a geometric mean, or a harmonic mean.

[0121] In the above-described embodiment, the total cost does not include the construction cost of the power supply system 1a. However, the total cost may include the construction cost of the power supply system 1a. In this case, for example, the recording medium 120 stores the first rated power generation P Ｒ１ and / or the first number N １ The cost determination unit 134 uses this table data to determine the first rated power generation power P Ｒ１ and / or the first number N １ The construction cost of the photovoltaic power generation facility 10 is determined from the second rated power generation P Ｒ２ and / or the second number N ２ The cost determination unit 134 uses this table data to determine the second rated power generation P Ｒ２ and / or the second number N ２ The construction cost of the fuel cell facility 20 is determined from the rated charge / discharge power P Ｒ３ and / or the third number N ３ The cost determination unit 134 uses this table data to calculate the rated charge / discharge power P Ｒ３ and / or the third number N ３ The construction cost of the power supply system 1a includes the construction cost of the photovoltaic power generation facility 10, the construction cost of the fuel cell facility 20, and the construction cost of the storage battery facility 30. The construction cost of the power supply system 1a may be the sum of the construction cost of the photovoltaic power generation facility 10, the construction cost of the fuel cell facility 20, and the construction cost of the storage battery facility 30.

[0122] The order of the steps in the sequence diagram of Fig. 4 can be changed as appropriate. For example, step S209 may be executed first, followed by steps S206 to S208.

[0123] [1-3. Effects, etc.] As can be understood from the above description, the simulation device 100 according to an example of the present disclosure performs a simulation of a power supply system 1a. The power supply system 1a includes a solar power generation facility 10, a fuel cell facility 20, and a storage battery facility 30. The power supply system 1a supplies power to a power load 5. The first power determination unit 131a calculates the solar radiation amount A ＳＵＮ and the power consumption P of the power load 5 Ｌ Based on the change over time in the power generation capacity P of the solar power generation facility 10, ＰＶ The second power determination unit 131b determines the change over time of the power consumption P Ｌ Changes over time and generated power P ＰＶ Based on the change over time in the power generation capacity P ＦＣ The third power determination unit 131c determines the change over time of the power consumption P Ｌ Changes over time and generated power P ＰＶ Changes over time and generated power P ＦＣ Based on the change over time in the charging and discharging power P ＳＢ This configuration determines the change over time in solar radiation A ＳＵＮ and power consumption P Ｌ It is suitable for grasping the power supply system 1a that is suitable for the above.

[0124] In one example of the present disclosure, the control period of the storage battery equipment 30 is shorter than the control period of the fuel cell equipment 20 .

[0125] In an example of the present disclosure, the first power determiner 131a determines the amount of solar radiation A ＳＵＮ Changes over time and power consumption P Ｌ Power consumption P over time Ｌ Based on the maximum value LM of ＰＶ According to this configuration, the change over time of the generated power P ＰＶ This makes it easier to avoid situations where there is a shortage of

[0126] In one example of the present disclosure, the first power determiner 131a determines the time t Ｐ The generated power P ＰＶ The generated power P ＰＶAccording to this configuration, the change over time of the generated power P ＰＶ This makes it easier to avoid situations where there is a shortage of

[0127] In an example of the present disclosure, the first power determiner 131a determines the amount of solar radiation A ＳＵＮ Changes over time and generated power P ＰＶ Constraint information representing constraints imposed on the size of the power consumption P Ｌ Based on the time-dependent change of the generated power P ＰＶ The constraint information includes at least one selected from the group consisting of: the size of the site 210; the shape of the site 210; and information on obstacles that block solar radiation to the site 210. With this configuration, the power generation power P that cannot be realized in the simulation is determined. ＰＶ This makes it easier to avoid situations where the above decision is made.

[0128] In one example of the present disclosure, the second power determiner 131b determines the power consumption P Ｌ From the change over time, the generated power P ＰＶ By subtracting the change over time in power consumption P Ｌ and generated power P ＰＶ The second power determiner 131b determines the change over time of the first difference between the power generated by the power source 131 and the power generated by the power source 131. ＦＣ The method of determination in this configuration is to determine the change over time of the generated power P ＦＣ This is an example of how to determine the change over time.

[0129] In an example of the present disclosure, the third power determination unit 131c determines the generated power P ＦＣ By subtracting the change over time of ＦＣ The third power determination unit 131c determines a change over time in the second difference between the charging and discharging power P ＳＢ The method of determination in this configuration is to determine the change over time of the charge / discharge power P ＳＢ This is an example of how to determine the change over time.

[0130] In an example of the present disclosure, the first facility determination unit 132a determines the power generation power P ＰＶ Based on the change over time in the first rated power generation power P of the solar power generation facility 10 Ｒ１, and / or the first number N of photovoltaic power generation modules in the photovoltaic power generation facility 10 １ The second facility determination unit 132b determines the generated power P ＦＣ Based on the change over time in the second rated power generation power P Ｒ２ , and / or the second number N of fuel cell systems in the fuel cell equipment 20 ２ The third facility determination unit 132c determines the charge / discharge power P ＳＢ Based on the change over time, the rated charge / discharge power P Ｒ３ , and / or the third number N of storage battery modules in the storage battery equipment 30 ３ This configuration determines the amount of solar radiation A ＳＵＮ and power consumption P Ｌ It is suitable for grasping the power supply system 1a that is suitable for the above.

[0131] In one example of the present disclosure, the cost determination unit 134 determines the first rated power generation power P Ｒ１ and / or the first number N １ and the second rated power generation P Ｒ２ and / or the second number N ２ and rated charge / discharge power P Ｒ３ and / or the third number N ３ The system cost of the power supply system 1a is determined based on the amount of solar radiation A ＳＵＮ and power consumption P Ｌ It is suitable for grasping the power supply system 1a that is suitable for the above.

[0132] In one example of the present disclosure, the cost determination unit 134 determines the generated power P ＦＣ The hydrogen cost for the fuel cell facility 20 is determined based on the change over time in the amount of solar radiation A. The simulation device 100 determines the total cost including the system cost and the hydrogen cost. ＳＵＮ and power consumption P Ｌ It is suitable for grasping the power supply system 1a that is suitable for the above.

[0133] In an example of the present disclosure, the power supply system 1a is connected to a commercial power source 2. The index evaluation unit 133 calculates the power consumption P Ｌand a time-varying change in the power flowing between the power supply system 1a and the commercial power source 2. The at least one index includes at least one selected from the group consisting of: a demand following rate DFR in the power supply system 1a; a renewable energy rate RER in the power supply system 1a; and a surplus power rate SPR in the power supply system 1a. This configuration is based on the solar radiation amount A ＳＵＮ and power consumption P Ｌ The power flowing between the power supply system 1a and the commercial power source 2 is a forward flow power P ＦＯＲ Or reverse flow power P ＲＥＶ For example, the forward flow power P ＦＯＲ Or reverse flow power P ＲＥＶ is the generated power P so that Equation 4 or Equation 5 holds. ＰＶ , generated power P ＦＣ , charging / discharging power P ＳＢ and power consumption P Ｌ It can be calculated from

[0134] In an example of the present disclosure, the display unit 140 displays the simulation results of the power supply system 1a. The simulation results include: generated power P ＰＶ Change over time in power generation P ＦＣ Change over time in charge / discharge power P ＳＢ The first rated power generation power P of the solar power generation facility 10 Ｒ１ The second rated power generation power P of the fuel cell equipment 20 Ｒ２ Rated charge / discharge power P of the battery equipment 30 Ｒ３ The first number N of photovoltaic power generation modules in the photovoltaic power generation facility 10 １ The second number N of fuel cell systems in the fuel cell facility 20 ２ The third number N of storage battery modules in the storage battery equipment 30 ３- a system cost of the power supply system 1a; - a hydrogen cost for the fuel cell equipment 20; - a total cost including the system cost and the hydrogen cost; - a change over time in the demand following rate DFR in the power supply system 1a; - a change over time in the renewable energy rate RER in the power supply system 1a; and - a change over time in the surplus power rate SPR in the power supply system 1a. ＳＵＮ and power consumption P Ｌ It is suitable for grasping the power supply system 1a that is suitable for the above.

[0135] A simulation method according to an example of the present disclosure is a simulation method for a power supply system 1a. The simulation method includes a first step, a second step, and a third step. In the first step, a solar radiation amount A ＳＵＮ and the power consumption P of the power load 5 Ｌ Based on the change over time in the power generation capacity P of the solar power generation facility 10, ＰＶ In the second step, the change in power consumption P Ｌ Changes over time and generated power P ＰＶ Based on the change over time in the power generation capacity P ＦＣ In the third step, the change in power consumption P Ｌ Changes over time and generated power P ＰＶ Changes over time and generated power P ＦＣ Based on the change over time in the charging and discharging power P ＳＢ Determine the change over time.

[0136] A program according to an example of the present disclosure includes instructions that, when executed by a processor, cause the processor to execute the simulation method. The program is implemented in, for example, the simulation device 100. The processor is, for example, the processor 130. The processor is, for example, a CPU, an ASIC, an FPGA, or the like.

[0137] A recording medium according to an example of the present disclosure is a computer-readable recording medium on which the above program is recorded. The recording medium is, for example, recording medium 120. The recording medium is, for example, a semiconductor recording medium, a magnetic recording medium, a magneto-optical recording medium, an optical recording medium, etc. The semiconductor recording medium is, for example, an SD card, a USB memory, an SSD, etc. The magnetic recording medium is, for example, an HDD, a flexible disk, etc. The magneto-optical recording medium is, for example, an MO, etc. The optical recording medium is, for example, a CD, a DVD, etc.

[0138] The technology disclosed herein can be used, for example, when proposing the introduction of a power supply system.

Claims

1. A method for simulating a power supply system, The power supply system includes solar power generation equipment, fuel cell equipment and battery storage equipment, The aforementioned power supply system supplies power to the power load, The aforementioned simulation method is The change over time of the first generated power of the solar power generation facility is determined based on the change over time of solar radiation at the site where the power supply system is installed and the maximum value of the power consumption in the change over time of the power consumption of the power load. Based on the aforementioned change in power consumption over time and the aforementioned change in the first generated power over time, the change in the second generated power of the fuel cell equipment over time is determined. This includes determining the change over time of the charging and discharging power of the battery storage equipment based on the change over time of the power consumption, the change over time of the first generated power, and the change over time of the second generated power. Simulation method.

2. The control cycle of the battery storage equipment is shorter than the control cycle of the fuel cell equipment. The simulation method according to claim 1.

3. This includes determining the time-dependent change of the first generated power such that the first generated power is equal to or greater than the maximum value at the time the maximum value appears. The simulation method according to claim 1.

4. The process includes determining the change in the first generated power over time based on the change in the amount of solar radiation over time, constraint information representing constraints imposed on the magnitude of the first generated power, and the change in the power consumption over time, The aforementioned constraint information is The size of the aforementioned site, The shape of the site, and Information on obstacles that obstruct sunlight reaching the site, Includes at least one selected from the group consisting of, The simulation method according to claim 1.

5. The change over time of the first difference between the power consumption and the first generated power is determined by subtracting the change over time of the first generated power from the change over time of the power consumption. This includes determining the time-dependent change of the second generated power based on the time-dependent change of the first difference, The simulation method according to claim 1.

6. The change over time of the second difference between the first difference and the second power generation is determined by subtracting the change over time of the second power generation from the change over time of the first difference. This includes determining the change in the charging and discharging power over time based on the change in the second difference over time, The simulation method according to claim 5.

7. Based on the aforementioned change in the first generated power over time, the first rated generated power of the solar power generation equipment and / or the first number of solar power generation modules in the solar power generation equipment are determined. Based on the aforementioned change in the second generated power over time, the second rated generated power of the fuel cell equipment and / or the second number of fuel cell systems in the fuel cell equipment is determined. This includes determining the rated charge / discharge power of the battery storage system and / or the third number of battery modules in the battery storage system based on the aforementioned change in charge / discharge power over time, The simulation method according to claim 1.

8. This includes determining the system cost of the power supply system based on the first rated power generation and / or the first number of units, the second rated power generation and / or the second number of units, and the rated charge / discharge power and / or the third number of units. The simulation method according to claim 7.

9. Based on the aforementioned change in the second generated power over time, the hydrogen cost for the fuel cell equipment is determined, This includes determining the total cost, including the system cost and the hydrogen cost, The simulation method according to claim 8.

10. The aforementioned power supply system is connected to the commercial power supply, The simulation method includes determining the time-dependent change of at least one indicator based on the time-dependent change of the power consumption and the time-dependent change of the power flowing between the power supply system and the commercial power source. The aforementioned at least one indicator is, The demand tracking rate in the aforementioned power supply system, The renewable energy ratio in the aforementioned power supply system, and The surplus power ratio in the aforementioned power supply system, Includes at least one selected from the group consisting of, The simulation method according to claim 1.

11. This includes displaying the simulation results of the power supply system, The above simulation results are: The change over time of the first generated power, The change over time of the second generated power, The change over time of the aforementioned charging and discharging power, The first rated power generation of the aforementioned solar power generation equipment, The second rated power generation of the fuel cell equipment, The rated charge and discharge power of the aforementioned battery equipment, The first number of solar power generation modules in the aforementioned solar power generation facility, The second number of fuel cell systems in the aforementioned fuel cell facility, The third number of battery modules in the aforementioned battery storage system, The system cost of the aforementioned power supply system, The hydrogen cost for the aforementioned fuel cell equipment, The total cost including the aforementioned system cost and hydrogen cost, Changes over time in the demand tracking rate in the aforementioned power supply system, The change over time in the renewable energy ratio in the aforementioned power supply system, and The change over time of the surplus power ratio in the aforementioned power supply system, Includes at least one selected from the group consisting of, The simulation method according to claim 1.

12. A computer program comprising, during execution by the processor, an instruction to cause the processor to execute the simulation method described in any one of claims 1 to 11.

13. A simulation device for performing simulations of power supply systems, The power supply system includes solar power generation equipment, fuel cell equipment and battery storage equipment, The aforementioned power supply system supplies power to the power load, The simulation device is A first power determination unit determines the time-dependent change in the first generated power of the solar power generation equipment based on the time-dependent change in solar radiation at the site where the power supply system is installed and the maximum value of the power consumption in the time-dependent change in the power consumption of the power load, A second power determination unit that determines the change over time of the second power generated by the fuel cell equipment based on the change over time of the power consumption and the change over time of the first power generated, The system includes a third power determination unit that determines the change in the charging and discharging power of the battery storage equipment over time based on the change in the power consumption over time, the change in the first generated power over time, and the change in the second generated power over time. Simulation device.