Control method, control device, and power supply system

Abstract

This control method is for a power supply-and-demand system (1b). The power supply-and-demand system (1b) includes a power load (5) and a power supply system (1a). The power supply-and-demand system (1b) can supply power to the power load (5) via an electric path (70). The power supply system (1a) is controlled such that the power supplied from the power supply system (1a) to the electric path (70) is adjusted. Operation of the power load (5), which involves consumption of power supplied from the electric path (70) to the power load (5), is controlled. Control of the power supply system (1a) and control of the power load (5) are executed by a common device.

Description

[Technical Field]

[0001] This disclosure relates to a control method, a control device, and a power supply system. [Background technology]

[0002] Patent Document 1 describes a load equipment monitoring system. This system monitors the status of a customer's load equipment. Based on the monitoring results, it determines the control method that minimizes the power consumption of the load equipment in relation to time, and predicts the energy saving effect when the load equipment is controlled by this method. This prediction result is then transmitted to the customer via a network. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2003-158823 [Overview of the project] [Problems that the invention aims to solve]

[0004] This disclosure provides technology suitable for cost-effectively operating powered systems. [Means for solving the problem]

[0005] This disclosure is, A control method for a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, Controlling the operation of the power supply system so that the power supplied from the power supply system to the circuit is adjusted, This includes controlling the operation of the power load, which involves the consumption of power supplied to the power load from the circuit, The control of the power supply system and the control of the power load are performed by a common device. A control method is provided.

[0006] In another respect, this disclosure is: A device for controlling a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, The operation of the power supply system is controlled so that the power supplied from the power supply system to the circuit is adjusted. Controlling the operation of the power load, which involves the consumption of power supplied to the power load from the aforementioned circuit. We provide the device.

[0007] In another respect, this disclosure is: A control method for a power supply system equipped with fuel cell equipment and capable of supplying power to a power load in connection with a commercial power source, The unit price of hydrogen is defined as the hydrogen unit price. When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, The control method described above is The first power supply is to be carried out in accordance with the relative increase in the electricity purchase price relative to the hydrogen price, This includes performing a second power supply in accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. A control method is provided.

[0008] In another respect, this disclosure is: A device for controlling a power supply system equipped with fuel cell equipment and capable of supplying power to a power load in connection with a commercial power source, The unit price of hydrogen is defined as the hydrogen unit price. When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, The aforementioned device is In response to the relative increase in the electricity purchase price relative to the hydrogen price, the power supply system is instructed to perform a first power supply. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, the power supply system is made to perform a second power supply. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. We provide the device.

[0009] In another respect, this disclosure is: A power supply system equipped with fuel cell equipment and capable of supplying power to power loads in connection with commercial power sources, The unit price of hydrogen is defined as the hydrogen unit price. When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, In response to the relative increase in the electricity purchase price relative to the hydrogen price, the first power supply is performed. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, a second power supply will be implemented. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. We provide power supply systems. [Effects of the Invention]

[0010] The technology described herein is suitable for cost-effectively operating powered systems. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a diagram showing the configuration of the power supply and demand system in Embodiment 1. [Figure 2] Figure 2 is an explanatory diagram of fluctuations in the price of purchased electricity. [Figure 3] Figure 3 is an explanatory diagram of fluctuations in the price of hydrogen. [Figure 4] Figure 4 is a flowchart illustrating the operation of the EMS server in Embodiment 1. [Figure 5] Figure 5 is an explanatory diagram of the first data displayed on the terminal in Embodiment 1. [Figure 6] Figure 6 is a flowchart illustrating the operation of the EMS server in Embodiment 2. [Figure 7] Figure 7 is a flowchart illustrating the operation of the EMS server in Embodiment 3. [Figure 8] Figure 8 is a flowchart illustrating the operation of the EMS server in Embodiment 4. [Figure 9] Figure 9 is a flowchart illustrating the operation of the EMS server in Embodiment 5. [Figure 10] Figure 10 is a flowchart illustrating the operation of the EMS server in Embodiment 6. [Figure 11] Figure 11 is a flowchart illustrating the operation of the EMS server in Embodiment 7. [Figure 12] Figure 12 is a flowchart illustrating the operation of the EMS server in Embodiment 8. [Figure 13] Figure 13 is a flowchart illustrating the operation of the EMS server in Embodiment 9. [Figure 14] Figure 14 is a flowchart illustrating the operation of the EMS server in Embodiment 10. [Figure 15] Figure 15 is an explanatory diagram of the change in the operating schedule. [Figure 16] Figure 16 is a flowchart illustrating the operation of the EMS server in a configuration combining Embodiment 1 and Embodiment 10. [Modes for carrying out the invention]

[0012] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted.

[0013] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0014] (Embodiment 1) [1-1. Structure] Figure 1 is a diagram showing the configuration of the power supply and demand system 1b in Embodiment 1. The power supply and demand system 1b includes a power supply system 1a, a circuit 70, and a power load 5.

[0015] The power supply system 1a is connected to the commercial power source 2. The power supply system 1a supplies power to the power load 5 via the circuit 70. The power supply system 1a, the EMS (Energy Management System) server 52, the electricity price server 53, the hydrogen price server 54, and the terminal 55 are connected to each other via the network 60.

[0016] The power supply system 1a is a distributed power supply system. The power supply system 1a includes a solar power generation facility 10, a fuel cell facility 20, a battery storage facility 30, a control device 50a, a distribution board 4, current sensors 3a, 3b, 7b, 7c, 7d1, 7d2, and 7d3. In Embodiment 1, the power supply system 1a is installed in a facility. Specifically, the facility is a factory. Current sensors 3a, 3b, 7b, 7c, 7d1, 7d2, and 7d3 are, for example, current transformers.

[0017] The solar power generation equipment 10 includes a solar power generation module 11, a DC-DC converter 12, and a DC-AC inverter 13. The DC power generated by the solar power generation module 11 is converted to DC power of different voltages by the DC-DC converter 12. The converted DC power is converted to AC power by the DC-AC inverter 13. The AC power is supplied to the circuit 70.

[0018] The fuel cell equipment 20 includes fuel cell systems 20a, 20b, and 20c. Each of the fuel cell systems 20a, 20b, and 20c is, for example, a polymer electrolyte fuel cell (PEFC) system, a solid oxide fuel cell (SOFC) system, and the like.

[0019] The fuel cell system 20a includes a fuel cell stack 21a, a DC-DC converter 22a, and a DC-AC inverter 23a. The DC power generated by the fuel cell stack 21a is converted to DC power of different voltages by the DC-DC converter 22a. The converted DC power is converted to AC power by the DC-AC inverter 23a. The AC power is supplied to the circuit 70.

[0020] The fuel cell system 20b includes a fuel cell stack 21b, a DC-DC converter 22b, and a DC-AC inverter 23b. The DC power generated by the fuel cell stack 21b is converted to DC power of different voltages by the DC-DC converter 22b. The converted DC power is converted to AC power by the DC-AC inverter 23b. The AC power is supplied to the circuit 70.

[0021] The fuel cell system 20c includes a fuel cell stack 21c, a DC-DC converter 22c, and a DC-AC inverter 23c. The DC power generated by the fuel cell stack 21c is converted to DC power of different voltages by the DC-DC converter 22c. The converted DC power is then converted to AC power by the DC-AC inverter 23c. The AC power is supplied to the circuit 70.

[0022] The battery storage system 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. Each of the battery modules 31a, 31b, and 31c is, for example, a lithium-ion battery module, a nickel-metal hydride battery module, a lead-acid battery module, etc.

[0023] The power discharged from the battery module 31a is converted into DC power of different voltages 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 circuit 70.

[0024] The alternating current power supplied from the circuit 70 to the DC-AC inverter 33 is converted to direct current power. This direct current power is then converted to direct current power of different voltages by the bidirectional DC-DC converter 32a. The converted direct current power is used to charge the battery module 31a.

[0025] The power discharged from the battery module 31b is converted into DC power of different voltages 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 circuit 70.

[0026] The alternating current power supplied from the circuit 70 to the DC-AC inverter 33 is converted to direct current power. This direct current power is then converted to direct current power of different voltages by the bidirectional DC-DC converter 32b. The converted direct current power is then used to charge the battery module 31b.

[0027] The power discharged from the battery module 31c is converted into DC power of different voltages 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 circuit 70.

[0028] The alternating current power supplied from the circuit 70 to the DC-AC inverter 33 is converted to direct current power. This direct current power is then converted to direct current power of different voltages by a bidirectional DC-DC converter 32c. The converted direct current power is then used to charge the battery module 31c.

[0029] Power can flow from circuit 70 to commercial power supply 2. Power can flow from commercial power supply 2 to circuit 70. Current sensor 3a detects the current flowing between circuit 70 and commercial power supply 2. The value detected by current sensor 3a is transmitted from current sensor 3a to control device 50a. By monitoring the current detected value of current sensor 3a, control device 50a can make the power flowing from commercial power supply 2 to power supply system 1a or from power supply system 1a to commercial power supply 2 follow a target power (e.g., 0W).

[0030] Power can flow from the circuit 70 to the power load 5 via the distribution board 4. The current sensor 3b detects the current flowing to the power load 5. The value detected by the current sensor 3b is transmitted from the current sensor 3b to the control device 50a.

[0031] In Embodiment 1, the power load 5 is the power load in a facility. The power load 5 includes a power load and a lighting load. Typically, the power load is driven at a higher voltage than the lighting load. Typically, the power load is a three-phase load, and the lighting load is a single-phase load. Specifically, the facility is a factory. The power load includes production lines. The lighting load includes lighting and / or air conditioning.

[0032] In Embodiment 1, the control cycle of the battery storage system 30 is shorter than the control cycle of the fuel cell system 20. Therefore, the charge / discharge power P of the battery storage system 30 SB The power generated by the fuel cell equipment 20 is P FC In comparison, the power generated by solar power generation equipment 10 P PV and / or power consumption P of power load 5 LIt is easy to follow the fluctuations. Specifically, the control cycle of the battery storage system 30 is shorter than the control cycle of the fuel cell system 20a, shorter than the control cycle of the fuel cell system 20b, and shorter than the control cycle of the fuel cell system 20c. For example, the control cycle of the battery storage system 30 is between 1 / 50 and 1 / 5 of the control cycle of the fuel cell storage system 20, fuel cell system 20a, fuel cell system 20b, and / or fuel cell system 20c. Note that charge / discharge power refers to charging power or discharge power. A positive charge / discharge power refers to discharge power, and the absolute value of a negative charge / discharge power refers to charging power.

[0033] The current sensor 7b detects the current flowing between the battery storage equipment 30 and the electrical circuit 70. Specifically, the current sensor 7b detects the charge and discharge current of the battery storage equipment 30. The value detected by the current sensor 7b is transmitted from the current sensor 7b to the control device 50a. The charge and discharge current is either the charging current or the discharge current. A positive charge and discharge current refers to the discharge current, and the absolute value of a negative charge and discharge current refers to the charging current.

[0034] The current sensor 7c detects the current flowing between the solar power generation equipment 10 and the electrical circuit 70. Specifically, the current sensor 7c detects the generated current of the solar power generation equipment 10. The value detected by the current sensor 7c is transmitted from the current sensor 7c to the control device 50a.

[0035] The current sensor 7d1 detects the current flowing between the fuel cell system 20a and the electrical circuit 70. Specifically, the current sensor 7d1 detects the generated current of the fuel cell system 20a. The value detected by the current sensor 7d1 is transmitted from the current sensor 7d1 to the control device 50a.

[0036] The current sensor 7d2 detects the current flowing between the fuel cell system 20b and the electrical circuit 70. Specifically, the current sensor 7d2 detects the generated current of the fuel cell system 20b. The value detected by the current sensor 7d2 is transmitted from the current sensor 7d2 to the control device 50a.

[0037] The current sensor 7d3 detects the current flowing between the fuel cell system 20c and the electrical circuit 70. Specifically, the current sensor 7d3 detects the generated current of the fuel cell system 20c. The value detected by the current sensor 7d3 is transmitted from the current sensor 7d3 to the control device 50a.

[0038] The voltage in the current path between the commercial power supply 2 and the circuit 70 can be considered to be a known value, which is, for example, 100V or 200V in RMS. The control device 50a determines the power flowing from the commercial power supply 2 to the circuit 70, i.e., the purchased power P, from the first value and the value detected by the current sensor 3a. BUY It can be calculated.

[0039] The voltage of power load 5 can be considered known. Specifically, the voltage of the power load can be considered known, taking the value of 2a. The voltage of the lighting load can be considered known, taking the value of 2b. The voltage of the power load is, for example, 3-phase 200V. The voltage of the lighting load is, for example, single-phase 100V. The current sensor 3b includes a first sensor unit and a second sensor unit. The first sensor unit detects the current flowing through the power load. The second sensor unit detects the current flowing through the lighting load. The control device 50a can calculate the power flowing from the circuit 70 to the power load, i.e., the power consumption of the power load, from the value of 2a and the detected value of the first sensor unit. The control device 50a can calculate the power flowing from the circuit 70 to the lighting load, i.e., the power consumption of the lighting load, from the value of 2b and the detected value of the second sensor unit. The control device 50a calculates the power flowing from the circuit 70 to the power load 5, i.e., the power consumption P of the power load 5, from the power consumption of the power load and the power consumption of the lighting load. L It can be calculated.

[0040] The voltage in the current path between the battery storage equipment 30 and the circuit 70 can be considered to be a known third value. This third value is, for example, 100V or 200V in RMS. The control device 50a determines the charge / discharge power P of the battery storage equipment 30 from the third value and the value detected by the current sensor 7b. SB It can be calculated.

[0041] The voltage of the current path between the photovoltaic power generation facility 10 and the electric circuit 70 can be considered to be known, taking a fourth value. The fourth value is, for example, 100V or 200V in effective value. The control device 50a calculates the generated power P of the photovoltaic power generation facility 10 from the fourth value and the detection value of the current sensor 7c PV can be calculated.

[0042] The voltage of the current path between the fuel cell system 20a and the electric circuit 70 can be considered to be known, taking a fifth value. The fifth value is, for example, 100V or 200V in effective value. The control device 50a can calculate the generated power of the fuel cell system 20a from the fifth value and the detection value of the current sensor 7d1. The voltage of the current path between the fuel cell system 20b and the electric circuit 70 can be considered to be known, taking a sixth value. The sixth value is, for example, 100V or 200V in effective value. The control device 50a can calculate the generated power of the fuel cell system 20b from the sixth value and the detection value of the current sensor 7d2. The voltage of the current path between the fuel cell system 20c and the electric circuit 70 can be considered to be known, taking a seventh value. The seventh value is, for example, 100V or 200V in effective value. The control device 50a can calculate the generated power of the fuel cell system 20c from the seventh value and the detection value of the current sensor 7d3. The control device 50a sums these generated powers to obtain the generated power P of the fuel cell facility 20 FC can be calculated.

[0043] In Embodiment 1, the control device 50a is an edge computer. The control device 50a has a gateway function. The EMS server 52 is a cloud server. The network 60 is a wireless network, specifically the internet. The terminal 55 is used by users, administrators, etc. of the power supply system 1a and / or power load 5. The terminal 55 is, for example, a smartphone, personal computer, tablet, mobile phone, personal digital assistant (PDA), etc. In Embodiment 1, the electricity price server 53 is a server of the power company. The hydrogen price server 54 is a server of the hydrogen supplier. The EMS server 52 communicates with the electricity price server 53 and the hydrogen price server 54 via the network 60.

[0044] The battery storage system 30 includes a control device 50b. The solar power generation system 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.

[0045] The control device 50a communicates with current sensor 3a, current sensor 3b, control device 50b, control device 50c, control device 50d1, control device 50d2, control device 50d3, and power load 5. 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 to control control devices 50b, 50c, 50d1, 50d2, 50d3, and power load 5.

[0046] The control device 50b receives a control signal from the control device 50a. Based on the control signal, the control device 50b controls the bidirectional DC-DC converter 32a, bidirectional DC-DC converter 32b, bidirectional DC-DC converter 32c, and DC-AC inverter 33. Controlling the bidirectional DC-DC converter 32a controls whether the battery module 31a is charging, on standby, or discharging. Controlling the bidirectional DC-DC converter 32b controls whether the battery module 31b is charging, on standby, or discharging. Controlling the bidirectional DC-DC converter 32c controls whether the battery module 31c is charging, on standby, or discharging. Controlling the DC-AC inverter 33 performs power conversion between DC and AC. Through these controls, the power flowing between the battery equipment 30 and the circuit 70 is controlled.

[0047] Specifically, the charging and discharging power of the battery module 31a is controlled by controlling the bidirectional DC-DC converter 32a. The charging and discharging power of the battery module 31b is controlled by controlling the bidirectional DC-DC converter 32b. The charging and discharging power of the battery module 31c is controlled by controlling the bidirectional DC-DC converter 32c.

[0048] In the illustrated example, the charging and discharging of the battery module 31a is controlled by controlling the terminal voltage V1 of the bidirectional DC-DC converter 32a relative to the terminal voltage V2 of the DC-AC inverter 33. The charging and discharging of the battery module 31b is controlled by controlling the terminal voltage V1 of the bidirectional DC-DC converter 32b relative to the terminal voltage V2 of the DC-AC inverter 33. The charging and discharging of the battery module 31c is controlled by controlling the terminal voltage V1 of the bidirectional DC-DC converter 32c relative to the terminal voltage V2 of the DC-AC inverter 33.

[0049] The control device 50c receives a control signal from the control device 50a. Based on the control signal, the control device 50c controls the DC-DC converter 12 and the DC-AC inverter 13. By controlling the DC-DC converter 12, the output voltage of the solar power generation module 11 is adjusted. By controlling the DC-AC inverter 13, power conversion between DC and AC is performed. Through these controls, power is extracted from the solar power generation equipment 10 to the power circuit 70.

[0050] The control device 50d1 receives a control signal from the control device 50a. Based on the control signal, the control device 50d1 controls the DC-DC converter 22a and the DC-AC inverter 23a. By controlling the DC-DC converter 22a, the output voltage of the fuel cell stack 21a is adjusted. By controlling the DC-AC inverter 23a, power conversion between DC and AC is performed. Through these controls, power is extracted from the fuel cell system 20a to the circuit 70.

[0051] The control device 50d2 receives a control signal from the control device 50a. Based on the control signal, the control device 50d2 controls the DC-DC converter 22b and the DC-AC inverter 23b. By controlling the DC-DC 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 circuit 70.

[0052] The control device 50d3 receives a control signal from the control device 50a. Based on the control signal, the control device 50d3 controls the DC-DC converter 22c and the DC-AC inverter 23c. By controlling the DC-DC 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 circuit 70.

[0053] Power load 5 receives a control signal from control device 50a. Power load 5 operates based on the control signal.

[0054] Hydrogen is used as fuel in the fuel cell equipment 20. Specifically, in Embodiment 1, 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 means that the power consumption P of the power load 5 is reduced. L This can increase the proportion of electricity derived from renewable energy sources. Furthermore, this can reduce carbon dioxide emissions caused by supplying power to the power load 5. Renewable energy sources include, for example, solar, wind, geothermal, hydroelectric, and biomass energy. In contrast, in Embodiment 1, the commercial power source 2 includes thermal power plants that generate electricity using fossil fuels such as oil and coal. With power generation using fossil fuels, it is impossible to avoid carbon dioxide emissions. For this reason, in Embodiment 1, supplying power to the power load 5 from the fuel cell equipment 20 is more advantageous from the viewpoint of improving environmental performance compared to supplying power to the power load 5 from the commercial power source 2.

[0055] In Embodiment 1, the power supply cost when supplying power from commercial power source 2 to power load 5 may fluctuate over time. This is because the price of electricity purchased from commercial power source 2 to power supply system 1a may fluctuate over time. Specifically, firstly, the price of electricity purchased may fluctuate within a single day. Figure 2 is an explanatory diagram of fluctuations in the price of electricity purchased. In Figure 2, the horizontal axis represents time. The vertical axis represents the price of electricity purchased per unit amount (hereinafter referred to as the electricity purchase price). For example, the unit of the electricity purchase price is yen / Wh. Figure 2 shows the fluctuation of the electricity purchase price over a single day. In the example in Figure 2, the electricity purchase price peaks between 7:00 and 10:00 and between 17:00 and 20:00. In Figure 2, curve 101 shows the change in the electricity purchase price over time in recent years. Curve 102 shows the change in the electricity purchase price over time that is expected to occur in 1 to 3 years. Curve 103 shows the expected change in electricity purchase price over time, 6 to 8 years from now. Secondly, electricity purchase price can fluctuate seasonally. For example, electricity purchase price tends to be higher in summer and winter than in spring and autumn. Thirdly, electricity purchase price can fluctuate due to international political situations, international economic situations, fossil fuel prices, etc. Fourthly, electricity purchase price can fluctuate due to the operation of a virtual power plant (VPP) and electricity market trading. Note that the power supply system 1a of Embodiment 1 can be incorporated into a VPP.

[0056] In Embodiment 1, the price of hydrogen as fuel in the fuel cell equipment 20 may fluctuate. Figure 3 is an explanatory diagram of the fluctuation of the price of hydrogen. In Figure 3, the horizontal axis represents time, and the vertical axis represents the price of hydrogen per unit. As shown in Figure 3, the price of hydrogen is expected to decrease in the future. This is because, in the future, the infrastructure related to hydrogen will be developed, and the cost required to produce and supply hydrogen per unit will decrease.

[0057] In Embodiment 1, the power supply and demand system 1b is controlled considering the electricity purchase price and the price of hydrogen. This can contribute to operating the power supply and demand system 1b cost-effectively. Here, "operating cost-effectively" means operating efficiently from an economic standpoint.

[0058] [1-2. Operation] Figure 4 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 1. The operation of the EMS server 52 shown in the flowchart of Figure 4 improves the operation of the power supply and demand system 1b with respect to the evaluation axis. In Embodiment 1, the evaluation axis is the electricity purchase price C BUY and hydrogen unit price C H2 This is a relationship of magnitude.

[0059] In step S101, the EMS server 52 receives the current power generation P of the solar power generation equipment 10. PV To obtain the power generation P, the EMS server 52 will acquire the power generation P. PV This is received from the control device 50a via the network 60.

[0060] Next, in step S102, the EMS server 52 determines the current power generation P of the fuel cell equipment 20. FC To obtain the power generation P, the EMS server 52 will acquire the power generation P. FC This is received from the control device 50a via the network 60.

[0061] Next, in step S103, the EMS server 52 determines the current charge / discharge power P of the battery storage equipment 30. SB To obtain the charge / discharge power P, the EMS server 52 obtains the charge / discharge power P. SB This is received from the control device 50a via the network 60.

[0062] Next, in step S104, the EMS server 52 determines the current power consumption P of the power load 5. L To obtain: Specifically, the EMS server 52 obtains power consumption P L This is received from the control device 50a via the network 60.

[0063] Next, in step S105, the EMS server 52 sends the current purchased power P from the commercial power source 2 to the power supply system 1a. BUY To obtain the power P. Specifically, the EMS server 52 obtains the purchased power P. BUYThis is received from the control device 50a via the network 60.

[0064] Next, in step S106, the EMS server 52 consumes power P L From, power generation P PV and charge / discharge power P SB The power deficit ΔP after subtracting the total of the above. X This calculates the deficit power ΔP. X This is calculated using the following formula 1. Formula 1:ΔP X =P L -P PV -P SB

[0065] Next, in step S107, the EMS server 52 determines the electricity purchase price C BUY Obtain the electricity purchase price C. BUY This is the price per unit of electricity purchased from commercial power source 2 to power supply system 1a. Specifically, the electricity purchase price C BUY This information was transmitted from the electricity price server 53 to the EMS server 52 via the network 60.

[0066] In Embodiment 1, the power load 5 includes a power load and a lighting load. In the first example, the unit price of electricity purchased for the power load and the unit price of electricity purchased for the lighting load are the same, and the unit price of electricity purchased for power load 5 is C BUY The prices are the same. The first example is seen, for example, when the owner of commercial power source 2 is a power company, and the power load and lighting load are included in a factory, and a contract is concluded between the power company and the factory that does not distinguish between the purchase price of electricity for the power load and the purchase price of electricity for the lighting load. In the second example, the purchase price of electricity for the power load (hereinafter, the first purchase price) and the purchase price of electricity for the lighting load (hereinafter, the second purchase price) are different. In the second example, the purchase price C BUY The value adopted is between the lower of the first and second electricity purchase prices and the higher of the two. This value may be the average of the first and second electricity purchase prices. The average may be the arithmetic mean, the geometric mean, or the harmonic mean.

[0067] Next, in step S108, the EMS server 52 calculates the price of hydrogen per unit amount (hereinafter referred to as the hydrogen price) C HG To obtain. The unit quantity is, for example, unit weight. Specifically, hydrogen price C HG This information was transmitted from the hydrogen price server 54 to the EMS server 52 via the network 60.

[0068] Next, in step S109, the EMS server 52 determines the hydrogen price C HG The unit price of hydrogen (hereinafter, hydrogen unit price) C H2 Convert to this. Hydrogen unit price C H2 This is the price of hydrogen required to generate a unit amount of electricity in the fuel cell equipment 20. For example, the unit of the hydrogen price is yen / Wh.

[0069] Next, in step S110, the EMS server 52 determines the hydrogen unit price C H2 The electricity purchase price C BUY Determine whether it is greater than or equal to C. H2 The electricity purchase price C BUY If it is greater than C, proceed to step S111. Hydrogen unit price C H2 The electricity purchase price C BUY If the following conditions are met, proceed to step S112.

[0070] In step S111, the EMS server 52 transmits a power purchase command to the control device 50a via the network 60. The power purchase command specifies the amount of purchased power P from the commercial power source 2 to the power supply system 1a. BUY The power deficit ΔP X While keeping pace with this, the power generation P of the fuel cell equipment 20 FC This is a command to set it to zero. The power purchase command is included in the control command sent from the EMS server 52 to the control device 50a. After step S111, the process proceeds to step S113.

[0071] When the control device 50a receives a power purchase command, it controls the power supply system 1a in accordance with the power purchase command. Specifically, the control device 50a controls the purchased power P BUY The power deficit ΔP XIn accordance with this, and the power generated by the fuel cell equipment 20 P FC The power supply system 1a is controlled so that the value becomes zero.

[0072] In step S112, the EMS server 52 transmits an FC output command to the control device 50a via the network 60. The FC output command is the generated power P FC The power deficit ΔP X While following suit, purchased electricity P BUY This is a command to set it to zero. The FC output command is included in the control command transmitted from the EMS server 52 to the control device 50a. After step S112, the process proceeds to step S113.

[0073] When the control device 50a receives an FC output command, it controls the power supply system 1a according to the FC output command. Specifically, the control device 50a controls the generated power P FC The power deficit ΔP X Following this, and also, purchased electricity P BUY The power supply system 1a is controlled so that the value becomes zero.

[0074] In step S113, the EMS server 52 transmits a load operation command to the power load 5 via the network 60. The load operation command is included in the control commands transmitted from the EMS server 52 to the power load 5. In one example, the load operation command is a command to operate the power load 5 in an energy-saving manner. In one specific example, the load operation command is a command to perform peak shifting of the power load.

[0075] Power load 5 will operate according to the load operation command when it receives a load operation command.

[0076] In step S114, the EMS server 52 stores data in its memory. In Embodiment 1, the data stored is the generated power P obtained in steps S101 to S109 of the current control cycle. PV Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power PBUY electricity purchase price C BUY Hydrogen price C HG and hydrogen unit price C H2 This includes the power generated P in the current control cycle and past control cycles after step S114 has been performed. PV Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY electricity purchase price C BUY Hydrogen price C HG and hydrogen unit price C H2 It is accumulating.

[0077] In Embodiment 1, a control cycle including steps S101 to S114 shown in Figure 4 is repeated. The control cycle is repeated at a predetermined control period. According to the control flowchart in Figure 4, the power supply system 1a can be operated cost-effectively.

[0078] In Embodiment 1, the greater the amount of solar radiation to the solar power generation equipment 10, the greater the amount of power P generated by the solar power generation equipment 10. PV The output voltage increases. Specifically, the control device 50a uses the DC-DC converter 12 to perform Maximum Power Point Tracking (MPPT) control of the solar power generation module 11. More specifically, a control signal is transmitted from the EMS server 52 to the control device 50a so that MPPT control can be realized, and the control device 50a uses the DC-DC converter 12 to adjust the output voltage of the solar power generation module 11 according to the control signal.

[0079] Furthermore, in Embodiment 1, the control device 50a controls the power generated P of the solar power generation equipment 10. PV and / or power consumption P of power load 5 L The charging and discharging power P of the battery storage system 30 is adjusted to follow the fluctuating components. SBcontrols. Specifically, a control signal is transmitted from the EMS server 52 to the control device 50b so that such tracking is realized, and the control device 50b controls the bidirectional DCDC converter 32a, the bidirectional DCDC converter 32b, the bidirectional DCDC converter 32c, and the DCAC inverter 33 in accordance with the control signal.

[0080] By accessing the EMS server 52 from the terminal 55 via the network 60, it is possible to display operation data related to the power supply and demand system 1b on the terminal 55. Specifically, the EMS server 52 transmits a signal including the operation data and for causing the operation data to be displayed to the terminal 55 via the network 60. This enables the terminal 55 to display the operation data. In Embodiment 1, the operation data includes first data.

[0081] FIG. 5 is an explanatory diagram of the first data displayed on the terminal 55 in Embodiment 1. In Embodiment 1, the first data is · Generated power P of solar power generation facility 10 PV over time, · Charge / discharge power P of storage battery facility 30 SB over time, · Generated power P of fuel cell facility 20 FC over time, · Power consumption P of power load 5 L over time, · Purchased power P from commercial power supply 2 to power supply system 1a BUY over time, · Purchased power unit price C BUY over time, · Hydrogen price C HG over time, and · Hydrogen unit price C H2 over time . In Embodiment 1, each temporal change is displayed in a graph format. In FIG. 5, the horizontal axis represents time. The vertical axis represents power. Note that in FIG. 5, in order to avoid cluttering the drawing, the purchased power P BUY over time, the purchased power unit price C BUY over time, and the hydrogen price C HGtime-dependent change of, and hydrogen unit price C H2 time-dependent change is not illustrated.

[0082] In Embodiment 1, generated power P PV , charge-discharge power P SB , generated power P FC , power consumption P L , purchased power P BUY , purchased power unit price C BUY , hydrogen price C HG and hydrogen unit price C H2 time-dependent changes are displayed. Through such display, it is possible to inform a display confirmer such as a user or administrator of the power supply system 1a and / or the power load 5 that these time-dependent changes are appropriately controlled.

[0083] Hereinafter, several other embodiments will be described. In the following, elements common to the already described embodiments and the embodiments described later are denoted by the same reference numerals, and descriptions thereof may be omitted. The descriptions regarding the respective embodiments can be applied to each other as long as there is no technical contradiction. The respective embodiments may be combined with each other as long as there is no technical contradiction.

[0084] (Embodiment 2) FIG. 6 is a flowchart for explaining the operation of the EMS server 52 in Embodiment 2. By the operation of the EMS server 52 shown in the flowchart of FIG. 6, the operation of the power supply and demand system 1b is improved with respect to the evaluation axis. In Embodiment 2, the evaluation axis is the renewable energy ratio RER RE .

[0085] After step S106, in step S207, the EMS server 52 calculates the current renewable energy ratio RER RE . Specifically, the renewable energy ratio RER RE is a value obtained by dividing a value obtained by subtracting the purchased power P L from the power consumption P BUY by the power consumption P L . That is, the renewable energy ratio RER REThis is calculated using the following formula 2. Formula 2: RER RE =(P L -P BUY ) / P L

[0086] Next, in step S208, the EMS server 52 retrieves the target value RER from the memory of the EMS server 52. TA Read out the target value RER. TA This is the renewable energy ratio (RER). RE This is the target value to follow. Specifically, the target value RER TA This was sent from terminal 55 to EMS server 52 via network 60.

[0087] Next, in step S210, the EMS server 52 determines the renewable energy ratio RER RE The target value is RER TA Determine whether it is greater than or equal to the renewable energy ratio (RER). RE The target value is RER TA If it is greater than, proceed to step S211. Renewable energy ratio (RER) RE The target value is RER TA If the following conditions are met, proceed to step S212.

[0088] In step S211, the EMS server 52 transmits a power purchase promotion command to the control device 50a via the network 60. The power purchase promotion command specifies the amount of purchased power P BUY and power generation P FC Purchased electricity P relative to the total BUY The ratio of the generated power P to the total is increased. FC The ratio of and the total of the deficit power ΔP X This is a command to make it follow suit. The power purchase promotion command is included in the control command sent from the EMS server 52 to the control device 50a. After step S211, the process proceeds to step S113.

[0089] When the control device 50a receives a power purchase promotion command, it controls the power supply system 1a in accordance with the power purchase promotion command. Specifically, the control device 50a controls the total purchased power P BUY The ratio of increases, and the generated power P relative to the total FC The ratio decreases, and the total is the power deficit ΔP X The power supply system 1a is controlled to follow suit.

[0090] In step S212, the EMS server 52 transmits an FC acceleration command to the control device 50a via the network 60. The FC acceleration command is for purchased power P BUY and power generation P FC Purchased electricity P relative to the total BUY The ratio of P is reduced, and the generated power P is reduced to the total. FC The ratio of and the total of the deficit power ΔP X This is a command to make it follow. The FC acceleration command is included in the control command sent from the EMS server 52 to the control device 50a. After step S212, the process proceeds to step S113.

[0091] When the control device 50a receives an FC acceleration command, it controls the power supply system 1a in accordance with the FC acceleration command. Specifically, the control device 50a controls the total purchased power P BUY The ratio of decreases, and the generated power P relative to the total decreases. FC The ratio of increases, and the total is the power deficit ΔP X The power supply system 1a is controlled to follow suit.

[0092] In step S114 of Embodiment 2, the data stored in the memory of the EMS server 52 is the generated power P obtained in steps S101 to S208 of this control cycle. PV , Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY Renewable energy ratio (RER) RE and target value RER TAThis includes the power generated P in the current control cycle and past control cycles after step S114 has been performed. PV , Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY Renewable energy ratio (RER) RE and target value RER TA It is accumulating.

[0093] In Embodiment 2, a control cycle including steps S101 to S114 shown in Figure 6 is repeated. The control cycle is repeated at a predetermined control period. According to the control flowchart in Figure 6, the renewable energy ratio RER RE Target value RER TA It can be made to follow.

[0094] In Embodiment 2, the operational data displayed on terminal 55 includes second data. The second data is: • Power generation P from 10 solar power generation facilities PV Changes over time, • Charging and discharging power P of the battery storage system 30 SB Changes over time, • Power generation P from fuel cell equipment 20 FC Changes over time, Power consumption P of power load 5 L Changes over time, • Purchased electricity P from commercial power source 2 to power supply system 1a. BUY Changes over time, • Renewable Energy Ratio RE Changes over time, and • Renewable Energy Ratio RE Target value RER TA This includes [the following]. In Embodiment 2, each change over time is displayed in graph format.

[0095] In Embodiment 2, the generated power P PV , charge / discharge power P SB , Power generation P FC , power consumption P L and purchased electricity PBUY Along with the temporal change of , the renewable energy ratio RER RE is displayed over time. Through such a display, a viewer of the display such as a user, an administrator or the like of the power supply system 1a and / or the power load 5 can be informed that the renewable energy ratio RER RE the power supply system 1a is controlled so as to follow the target value RER TA can be communicated.

[0096] (Embodiment 3) FIG. 7 is a flowchart for illustrating the operation of the EMS server 52 in the third embodiment. By the operation of the EMS server 52 shown in the flowchart of FIG. 7, the operation of the power supply and demand system 1b is improved with respect to the evaluation axis. In the third embodiment, the evaluation axis is the carbon dioxide reduction rate COR in the power supply and demand system 1b RE .

[0097] After step S106, in step S307, the EMS server 52 calculates the current carbon dioxide reduction rate COR RE . Specifically, the EMS server 52 has a memory, and the memory has a database. In the database, · The generated power P of the photovoltaic power generation facility 10 PV and the carbon dioxide emission amount CDE of the photovoltaic power generation facility 10 PV correspondence relationship between · The generated power P of the fuel cell facility 20 FC and the carbon dioxide emission amount CDE of the fuel cell facility 20 FC correspondence relationship between · The charge / discharge power P of the storage battery facility 30 SB and the carbon dioxide emission amount CDE of the storage battery facility 30 SB correspondence relationship between, and · The purchased power P from the commercial power supply 2 to the power supply system 1a BUY and the carbon dioxide emission amount CDE of the commercial power supply 2 BUY correspondence relationship between are recorded. The EMS server 52 uses the generated power P acquired in steps S101, S102, S103 and S105 PV , the generated power P FC, charge / discharge power P SB and purchased electricity P BUY Based on the above database, the current COE of carbon dioxide emissions RE The EMS server 52 calculates the power consumption P obtained in step S104. L Based on the above database, power consumption P L All of it is purchased electricity P BUY Hypothetical COE emissions if covered by HYP The EMS server 52 then calculates the COE of carbon dioxide emissions. RE and COE HYP Based on the carbon dioxide reduction rate COR RE Calculate the carbon dioxide reduction rate (COR). Specifically, the carbon dioxide reduction rate (COR) RE COE HYP COE RE The value obtained by subtracting the COE of carbon dioxide emissions is RE or COE (Center of Excellence) for carbon dioxide emissions HYP It is the value obtained by dividing by the carbon dioxide reduction rate (COR). RE This is calculated using either formula 3 or formula 4 below. Formula 3: COR RE =(COE HYP -COE RE ) / COE RE Formula 4: COR RE =(COE HYP -COE RE ) / COE HYP

[0098] Next, in step S308, the EMS server 52 retrieves the target value COR from the memory of the EMS server 52. TA Read out the target value COR. TA This is the carbon dioxide reduction rate (COR). RE This is the target value to follow. Specifically, the target value COR TA This was sent from terminal 55 to EMS server 52 via network 60.

[0099] Next, in step S310, the EMS server 52 determines the carbon dioxide reduction rate COR RE The target value is COR TA Determine whether it is greater than or equal to the CO2 reduction rate. RE The target value is COR TA If it is greater than, proceed to step S211. CO2 reduction rate COR RE The target value is COR TA If the following conditions are met, proceed to step S212.

[0100] In step S114 of Embodiment 3, the data stored in the memory of the EMS server 52 is the generated power P obtained in steps S101 to S308 of the current control cycle. PV Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY COE RE COE HYP , CO2 reduction rate RE and target value COR TA This includes the power generated P in the current control cycle and past control cycles after step S114 has been performed. PV Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY COE RE COE HYP , CO2 reduction rate RE and target value COR TA It is accumulating.

[0101] In Embodiment 3, a control cycle including steps S101 to S114 shown in Figure 7 is repeated. The control cycle is repeated at a predetermined control period. According to the control of the flowchart in Figure 7, the carbon dioxide reduction rate COR RE Target value COR TA It can be made to follow.

[0102] In Embodiment 3, the operational data displayed on terminal 55 includes third data. The third data is: • Power generation P from 10 solar power generation facilities PV Changes over time, • Charging and discharging power P of the battery storage system 30 SB Changes over time, • Power generation P from fuel cell equipment 20 FC Changes over time, Power consumption P of power load 5 L Changes over time, • Purchased electricity P from commercial power source 2 to power supply system 1a. BUY Changes over time, • Carbon dioxide reduction rate (COR) RE Changes over time, and • Carbon dioxide reduction rate (COR) RE Target value COR TA This includes [the following]. In Embodiment 3, each change over time is displayed in graph format.

[0103] In Embodiment 3, the generated power P PV , charge / discharge power P SB Power generation P FC , power consumption P L and purchased electricity P BUY Along with the changes over time, the carbon dioxide reduction rate COR RE The change over time is displayed. Through this display, the carbon dioxide reduction rate (COR) is shown to users, administrators, and other viewers of the power supply system 1a and / or power load 5. RE The target value is COR TA It can be communicated that the power supply system 1a is controlled to follow the signal.

[0104] (Embodiment 4) Figure 8 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 4. The operation of the EMS server 52 shown in the flowchart of Figure 8 improves the operation of the power supply and demand system 1b with respect to the evaluation axis. In Embodiment 4, the evaluation axis is the COA (Coronavirus Amount) of carbon dioxide reduction in the power supply and demand system 1b. RE That is the case.

[0105] After step S106, in step S407, the EMS server 52 displays the current COA (Carbon Dioxide Reduction) per unit time. RE Specifically, the EMS server 52 calculates the COE of carbon dioxide emissions, as described in Embodiment 3. HYP COE RE The value obtained by subtracting COE HYP -COE RE This calculates the COA (Carbon Dioxide Amount). RE That is, COA (Carbon Dioxide Reduction) RE This is calculated using the following formula 5. Formula 5: COA RE =COE HYP -COE RE

[0106] Next, in step S408, the EMS server 52 retrieves the target value COA from the memory of the EMS server 52. TA Read out the target value COA. TA COA (Chemical Analysis of Carbon Dioxides) RE This is the target value to follow. Specifically, the target value COA TA This was sent from terminal 55 to EMS server 52 via network 60.

[0107] Next, in step S410, the EMS server 52 displays the COA (Carbon Dioxide Reduction Amount). RE Target value COA TA Determine whether it is greater than or equal to the COA (Carbon Dioxide Reduction). RE Target value COA TA If it is greater than or equal to, proceed to step S211. COA (Carbon Dioxide Reduction) RE Target value COA TA If the following conditions are met, proceed to step S212.

[0108] In step S114 of Embodiment 4, the data stored in the memory of the EMS server 52 is the generated power P obtained in steps S101 to S408 of the current control cycle. PV Power generation P FC , charge / discharge power PSB , power consumption P L , purchased power P BUY COE RE COE HYP COA (Carbon Dioxide Reduction) RE and target value COA TA This includes the power generated P in the current control cycle and past control cycles after step S114 has been performed. PV Power generation P FC , charge / discharge power P SB , power consumption P L , purchased power P BUY COE RE COE HYP COA (Carbon Dioxide Reduction) RE and target value COA TA It is accumulating.

[0109] In Embodiment 4, a control cycle including steps S101 to S114 shown in Figure 8 is repeated. The control cycle is repeated at a predetermined control period. According to the control of the flowchart in Figure 8, the COA reduction amount is RE Target value COA TA It can be made to follow.

[0110] In Embodiment 4, the operational data displayed on terminal 55 includes the fourth data. The fourth data is: • Power generation P from 10 solar power generation facilities PV Changes over time, • Charging and discharging power P of the battery storage system 30 SB Changes over time, • Power generation P from fuel cell equipment 20 FC Changes over time, Power consumption P of power load 5 L Changes over time, • Purchased electricity P from commercial power source 2 to power supply system 1a. BUY Changes over time, • COA (Certificate of Carbon Dioxide Reduction) RE Changes over time, and • COA (Certificate of Carbon Dioxide Reduction) RE Target value COA TA This includes [the following]. In Embodiment 4, each change over time is displayed in graph format.

[0111] In Embodiment 4, the generated power P PV , charge / discharge power P SB Power generation P FC , power consumption P L and purchased electricity P BUY Along with the change over time, the amount of COA (Chemical Analysis of Carbon Dioxides) RE The change over time is displayed. Through this display, the carbon dioxide reduction amount (COA) is shown to users, administrators, and other viewers of the power supply system 1a and / or power load 5. RE Target value COA TA It can be communicated that the power supply system 1a is controlled to follow the signal.

[0112] (Embodiment 5) In Embodiment 5, the EMS server 52 controls the power supply and demand system 1b through weather-based forecasts at the location of the power supply and demand system 1b. Also, similar to Embodiment 1, the electricity purchase price C BUY and hydrogen unit price C H2 The power supply and demand system 1b is controlled based on the relative magnitudes of the two factors.

[0113] The memory of the EMS server 52 contains a database. The database records past information (hereinafter referred to as past information). Past information is information from a past period (hereinafter referred to as the past period). Past information is, • Changes in solar radiation over time at the location of power supply and demand system 1b. • Power generation P from 10 solar power generation facilities PV Changes over time, and Power consumption P of power load 5 L Changes over time This includes, specifically, historical data in the database, solar radiation, and power generation P. PV and power consumption P L However, these are linked to each other at each point in time. The past period is, for example, one year. Solar radiation can be measured, for example, by a pyranometer.

[0114] Figure 9 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 5.

[0115] In step S501, the EMS server 52, • Changes in solar radiation over time at the location of power supply and demand system 1b in past data. • Past data on the power generation P of solar power generation facility 10 PV Changes over time, and • Current solar radiation at the location of power supply and demand system 1b Based on this, the current solar power generation equipment 10 generates power P PV This predicts the current solar radiation. Specifically, the EMS server 52 compares the solar radiation at each point in time in the historical data with the current solar radiation. This allows the EMS server 52 to identify which point in the past corresponds to the current solar radiation. The EMS server 52 then uses the historical data to predict the generated power P at that point in time. PV P PV We predict this to be the case.

[0116] Next, in step S502, the EMS server 52, • Power consumption P of power load 5 in past data L Changes over time, and • Current day Based on this, the current power consumption P L To predict, the power load 5 in the facility will have a power consumption P L The day with the highest power consumption P L There are days when the power consumption is low. For example, if the facility is a factory, the power consumption P is low in winter. L The power consumption P increases on weekdays. L This increases. In this way, the power consumption P in past information L There are patterns in the changes over time that vary depending on the facility. The EMS server 52 uses historical data to determine the power consumption P L Based on the changes over time, it is determined which day in the pattern corresponds to the current day. Then, the EMS server 52 determines the power consumption P at the same time as the current day on the corresponding day.L The current power consumption P L We predict this to be the case.

[0117] Next, in step S503, the EMS server 52, • The predicted power generation P PV , and • The predicted power consumption P L , Based on this, specific power ΔP SP Calculate the specific power ΔP. SP Power consumption P L From power generation P PV This is the difference after subtracting the specific power ΔP. SP This is calculated using the following formula 6. Formula 6:ΔP SP =P L -P PV

[0118] Next, in step S504, the EMS server 52 receives a specific power ΔP SP Based on this, charge / discharge power P SB and the power deficit ΔP X This predicts the following. Specifically, this prediction is calculated such that the following equation 7 holds true. Formula 7: ΔP SP =P SB +ΔP X In Embodiment 5, the specific power ΔP SP Of these, the stable component is the deficit power ΔP X It is covered by the charging and discharging power P, and the fluctuating component is the charging and discharging power P. SB The power supply system 1a is configured to be supplied by the following: According to a predetermined algorithm configured to supply both the stable and fluctuating components in this manner, the specific power ΔP SP From charge / discharge power P SB and the power deficit ΔP X This is predicted.

[0119] Next, in step S505, the EMS server 52 generates power P FC and purchased electricity P BUYPredicts the following: Similar to embodiments 1 to 4, in embodiment 5, the underpower ΔP X The power generated by the fuel cell equipment 20 is P FC , and purchased electricity P from commercial power source 2 to power supply system 1a. BUY It is supplied by either of the following. In Embodiment 5, the EMS server 52 supplies the deficit power ΔP X Power generation P FC Is it covered by, or is it purchased electricity P BUY Determine whether it is covered by the hydrogen unit price C. This determination is made based on the previous step S110. Specifically, in the previous step S110, the hydrogen unit price C H2 The electricity purchase price C BUY If it is determined to be greater than ΔP, then the power deficit ΔP X Purchased electricity P BUY It is determined that it is covered by purchased electricity P. BUY The power deficit is ΔP X Equal to the generated power P FC It is predicted to be zero. On the other hand, in the previous step S110, the hydrogen unit price C H2 The electricity purchase price C BUY If it is determined that the following applies, then the power deficit ΔP X Power generation P FC It is determined that it is covered by the generated power P. FC The power deficit is ΔP X Equivalent to purchased electricity P BUY It is predicted to be zero.

[0120] After step S505, proceed to step S106.

[0121] (Embodiment 6) In Embodiment 6, the EMS server 52 controls the power supply and demand system 1b through weather-based forecasts at the location of the power supply and demand system 1b. Also, similar to Embodiment 2, the renewable energy ratio RER RE Based on this, the power supply and demand system 1b is controlled. Figure 10 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 6.

[0122] After step S504, in step S505, the EMS server 52 generates power P FC and purchased electricity P BUY This predicts the purchased electricity P based on the previous steps S211 or S212. BUY and power generation P FC This is done taking into account the amount of change. After step S505, proceed to step S106.

[0123] (Embodiment 7) In Embodiment 7, the EMS server 52 controls the power supply and demand system 1b through weather-based forecasts at the location of the power supply and demand system 1b. Also, similar to Embodiment 3, the carbon dioxide reduction rate COR RE Based on this, the power supply and demand system 1b is controlled. Figure 11 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 7.

[0124] (Embodiment 8) In Embodiment 8, the EMS server 52 controls the power supply and demand system 1b through weather-based forecasts at the location of the power supply and demand system 1b. Also, similar to Embodiment 4, the COA (carbon dioxide reduction amount per unit time) is measured. RE Based on this, the power supply and demand system 1b is controlled. Figure 12 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 8.

[0125] (Embodiment 9) Figure 13 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 9. The operation of the EMS server 52 shown in the flowchart of Figure 13 improves the operation of the power supply and demand system 1b with respect to the evaluation axis. In Embodiment 9, the evaluation axis is the load following rate LFC in the power supply and demand system 1b. RE That is the case.

[0126] In step S601, the EMS server 52 load tracking rate LFC RE Calculate the load following rate (LFC). Specifically, the load following rate (LFC) RE This refers to the power generated P in the power supply system 1a.G Power consumption P L It is the value obtained by dividing by . In other words, the load following rate LFC RE This is calculated using the following formula 8. Formula 8: LFC RE =P G / P L

[0127] In Embodiment 9, the generated power P G Power generation P PV and power generation P FC It is greater than or equal to the sum of the above. Specifically, the generated power P G Power generation P PV and power generation P FC This is the sum of the generated power P. PV and power generation P FC This can be obtained in the same manner as steps S101 and S102 in Figure 4, etc.

[0128] Next, in step S602, the EMS server 52 retrieves the upper limit LFC from the memory of the EMS server 52. THH and lower limit LFC THL Read out the upper limit LFC. THH For example, it may be between 1.1 and 1.5, or between 1.2 and 1.4. Lower limit LFC THL For example, it may be between 0.5 and 0.9, or between 0.6 and 0.8. Specifically, the upper limit LFC THH and lower limit LFC THL This was sent from terminal 55 to EMS server 52 via network 60.

[0129] Next, in step S603, the EMS server 52 load tracking rate LFC RE The upper limit is LFC THH Determine whether it is greater than or equal to the load following rate (LFC). RE The upper limit is LFC THH If it is greater than, proceed to step S604. Load tracking rate LFC RE The upper limit is LFC THH If the following conditions apply, proceed to S605.

[0130] In step S605, the EMS server 52 load tracking rate LFC RE The lower limit is LFC THL Determine whether it is smaller than or equal to the load following rate (LFC). RE The lower limit is LFC THL If it is less than, proceed to step S606. Load tracking rate LFC RE The lower limit is LFC THL The current flow will end if the following conditions are met.

[0131] In step S604, the EMS server 52 transmits an FC reduction command to the control device 50a via the network 60. The FC reduction command is transmitted to the generated power P FC This is a command to reduce the FC. The FC reduction command is included in the control commands transmitted from the EMS server 52 to the control device 50a.

[0132] When the control device 50a receives an FC reduction command, it controls the power supply system 1a in accordance with the FC reduction command. Specifically, the control device 50a controls the generated power P FC The power supply system 1a is controlled so that the amount decreases.

[0133] In step S606, the EMS server 52 transmits an FC increase command to the control device 50a via the network 60. The FC increase command is a command for generating power P FC This is a command to increase the FC. The FC increase command is included in the control commands transmitted from the EMS server 52 to the control device 50a.

[0134] When the control device 50a receives an FC increase command, it controls the power supply system 1a in accordance with the FC increase command. Specifically, the control device 50a controls the generated power P FC The power supply system 1a is controlled so that it increases.

[0135] In Embodiment 9, a control cycle including steps S601 to S606 shown in Figure 13 is repeated. The control cycle is repeated at a predetermined control period. According to Embodiment 9, the load following rate LFC RE The upper limit is LFCTHH When it is greater than the load tracking ratio LFC RE Reduces load tracking rate LFC RE The lower limit is LFC THL When it is smaller than the load tracking ratio LFC RE This can increase the load following rate (LFC). RE This can suppress deviations from the appropriate range.

[0136] In Embodiment 9, the operational data displayed on terminal 55 includes fifth data. The fifth data is: • Power generation P from 10 solar power generation facilities PV Changes over time, • Charging and discharging power P of the battery storage system 30 SB Changes over time, • Power generation P from fuel cell equipment 20 FC Changes over time, Power consumption P of power load 5 L Changes over time, • Purchased electricity P from commercial power source 2 to power supply system 1a. BUY Changes over time, and • Load tracking rate LFC RE Changes over time, This includes. In Embodiment 9, each change over time is displayed in graph format. The fifth data is the upper limit LFC. THH and / or lower limit LFC THL It may include.

[0137] In Embodiment 9, the generated power P PV , charge / discharge power P SB Power generation P FC , power consumption P L and purchased electricity P BUY Along with the change over time, the load following rate LFC RE The change over time is displayed. Through this display, the user, administrator, or other person who checks the display of the power supply system 1a and / or power load 5 can see the load following rate LFC. RE It can convey that it is appropriate.

[0138] The control of Embodiment 9 may be combined with the control of Embodiments 1 to 8. For example, when the control of Embodiment 9 is combined with the control of Embodiment 1, if neither step S603 nor step S605 in Figure 13 is met ("No"), the control of Figure 4 is performed. If either step S603 or step S605 in Figure 13 is met ("Yes"), the control of Figure 4 is not performed, and the control of step S604 or S606 in Figure 13 is performed. The same can be done when the control of Embodiment 9 is combined with the control of Embodiments 2 to 8.

[0139] (Embodiment 10) Figure 14 is a flowchart illustrating the operation of the EMS server 52 in Embodiment 10. In Embodiment 10, the evaluation axis is the electricity purchase price C. BUY In embodiment 10, the electricity purchase price C BUY Accordingly, the operating schedule of the power load 5 may be changed.

[0140] In step S701, the EMS server 52 determines the electricity purchase price C BUY To obtain. In Embodiment 10, step S701 is the same as step S107 in Figure 4, etc.

[0141] Next, in step S702, the EMS server 52 retrieves threshold C from the memory of the EMS server 52. TH Read out the threshold C. Specifically, threshold C TH This was sent from terminal 55 to EMS server 52 via network 60.

[0142] Next, in step S703, the EMS server 52 determines the electricity purchase price C BUY Threshold C TH Determine whether it is greater than or equal to the purchase price C. BUY Threshold C TH If it is greater than C, proceed to step S704. BUY Threshold C TH If the following conditions are met, proceed to step S706.

[0143] In step S704, the EMS server 52 determines whether the change prohibition flag is off or off. If the change prohibition flag is on, it means that changes to the operating schedule of the power load are prohibited. Conversely, if the change prohibition flag is off, it means that changes to the operating schedule are permitted. If the change prohibition flag is off, the process proceeds to step S705. If the change prohibition flag is on, the process proceeds to step S706.

[0144] For example, the change prohibition flag is set to ON until a predetermined period has elapsed since the last change in the operating schedule of the power load, and then switches from ON to OFF after the predetermined period has elapsed. Alternatively, for example, a signal to turn the change prohibition flag ON or OFF may be sent from terminal 55 to the EMS server 52 via network 60. According to the latter example, the change prohibition flag can be set ON or OFF according to the will of the user, administrator, etc. of the power supply system 1a and / or power load 5.

[0145] In step S705, the EMS server 52 changes the operating schedule of the power load. After step S705, the process proceeds to step S706. The changes to the operating schedule will be explained below with reference to Figure 15.

[0146] Figure 15 is an explanatory diagram of the change in the operating schedule. In Figure 15, the horizontal axis represents time. The vertical axis represents the price of electricity purchased per unit of energy, i.e., the electricity purchase price. Curve 200 represents the electricity purchase price C on days prior to the day the change is implemented. BUY This shows the change over time. In Figure 15, the low-cost period 201 and the high-cost period 202 are shown. The low-cost period 201 and the high-cost period 202 are the electricity purchase price C on the past days mentioned above. BUY These time zones are based on the relative magnitudes of the two factors. In other words, the "low price" and "high price" in the low price time zone 201 and high price time zone 202 refer to the electricity purchase price C on the past days mentioned above. BUY This refers to the relative magnitude of the price, where the electricity purchase price per unit is C during the low-cost time period 201 compared to the high-cost time period 202. BUYThis is the time period when the price is low. In the example in Figure 15, the low-price time period 201 has multiple parts, and the high-price time period 202 also has multiple parts. However, the low-price time period 201 may be a single time period, and the high-price time period 202 may also be a single time period. The change in the operating schedule in step S705 is performed such that, after the change, the operating time of the power load in the low-price time period 201 increases and the operating time of the power load in the high-price time period 202 decreases compared to before the change. "Past day" is, for example, any day from one week before the day in which step S705 is performed to the day before.

[0147] In the example in Figure 15, the low-cost time slot 201 corresponds to 0:00 to 7:00, 10:00 to 18:00, and 22:00 to 24:00. The high-cost time slot 202 corresponds to 7:00 to 10:00 and 18:00 to 22:00. As shown by block arrow 211 in Figure 15, the original operating schedule shows that the power load operates from 7:00 to 15:00. In contrast, as shown by block arrow 212 in Figure 15, the revised operating schedule shows that the power load operates from 10:00 to 18:00. In the original operating schedule, the power load operates for 5 hours in the low-cost time slot 201 (10:00 to 15:00) and for 3 hours in the high-cost time slot 202 (7:00 to 10:00). In contrast, in the revised operating schedule, the power load operates for 8 hours in the low-cost time slot 201 (10:00 to 18:00) and for zero hours in the high-cost time slot 202.

[0148] In step S706, the EMS server 52 transmits a power load operation command to the power load via the network 60. The power load operation command includes the operating schedule of the power load. The power load operation command is included in the control command transmitted from the EMS server 52 to the power load 5. When the power load receives the power load operation command, it operates according to the power load operation command.

[0149] In Embodiment 10, a control cycle including steps S701 to S706 shown in Figure 14 is repeated. The control cycle is repeated at a predetermined control period. According to Embodiment 10, the operation of the power load can be reviewed in response to an increase in the cost of electricity purchase.

[0150] The control of Embodiment 10 may be combined with the control of Embodiments 1 to 9. Figure 16 is a flowchart illustrating the operation of the EMS server 52 in a configuration combining Embodiment 1 and Embodiment 10. In the example in Figure 16, the load operation command in step S113 includes the power load operation command in step S706 of Figure 14. In the flowchart of Figure 16, step S107 executes the operation corresponding to the operation in step S701 of Figure 14. Note that in Figure 16, steps S101 to S109 are simplified due to space limitations.

[0151] Various modifications can be applied to the embodiments described above.

[0152] In the modified step S110 of the example in Figures 4, 9, and 16, the EMS server 52 controls the hydrogen unit price C H2 The product C obtained by multiplying by the coefficient K. H2 • K is the electricity purchase price C BUY Determine whether it is greater than or equal to 1. The coefficient K is a positive value and can be less than 1 or greater than 1. H2 • K2 has a purchase price of C BUY If it is greater than C, proceed to step S111. H2 • K is the electricity purchase price C BUY If the following conditions are met, proceed to step S112. For example, setting K to less than 1 makes it easier to proceed to step S112, that is, it makes it easier to generate electricity with the fuel cell equipment 20. For example, setting K to less than 1 is effective when prioritizing the generation of electricity by the fuel cell equipment 20 over purchased electricity, taking environmental considerations into account.

[0153] In the embodiment described above, the EMS server 52 transmits a load operation command to the power load 5 via the network 60. When the power load 5 receives a load operation command, it operates according to the load operation command. The load operation command may include a power load operation command and a lighting load operation command. When a power load in the power load 5 receives a power load operation command, it may operate according to the power load operation command. When a lighting load in the power load 5 receives a lighting load operation command, it may operate according to the lighting load operation command. By using both power load operation commands and lighting load operation commands, the control of the power load 5 as a whole can be further optimized. It is also possible to control the power load and the lighting load independently of each other.

[0154] In the embodiment 10 described above, the power load 5 includes a power load, and the electricity purchase price C BUY The power load is controlled based on this. In a modified example, the electricity purchase price C BUY Based on this, the lighting load included in power load 5 is controlled. The description of the modified form can be obtained by substituting the terms in the description of Embodiment 10. Substitutions include substituting "power" for "lighting". Purchase price of electricity C BUY Based on this, both power loads and lighting loads may be controlled.

[0155] In the embodiment 9 described above, the EMS server 52 can transmit either an FC reduction command or an FC increase command. However, the EMS server 52 may be capable of transmitting only one of the FC reduction command or the FC increase command.

[0156] In the embodiment described above, the charging and discharging power P of the battery storage equipment 30 is determined from the value detected by the current sensor 7b. SB The power is calculated. In another example, a power controller including a DC-AC inverter 33 is provided in the battery storage system 30. A logger is provided in the power controller. The logger calculates the charge / discharge power P. SB The system detects this and transmits the detected value to the control device 50a.

[0157] In the embodiment described above, the power generated by the solar power generation equipment 10 is determined from the value detected by the current sensor 7c. PV The power generated P is calculated. In another example, a solar power generation facility 10 is equipped with a power controller including a DC-AC inverter 13. A logger is provided in the power controller. The logger records the generated power P PV The system detects this and transmits the detected value to the control device 50a.

[0158] In the embodiment described above, the power generated by the fuel cell equipment 20 is determined from the detected values ​​of the current sensors 7d1 to d3. FC The power controller calculates the power generation P. In another example, a power controller including a DC-AC inverter 23a is provided in the fuel cell system 20a. A logger is provided in the power controller. The logger detects the power generated by the fuel cell system 20a and transmits the detected value to the control device 50a. A power controller including a DC-AC inverter 23b is provided in the fuel cell system 20b. A logger is provided in the power controller. The logger detects the power generated by the fuel cell system 20b and transmits the detected value to the control device 50a. A power controller including a DC-AC inverter 23c is provided in the fuel cell system 20c. A logger is provided in the power controller. The logger detects the power generated by the fuel cell system 20c and transmits the detected value to the control device 50a. The control device 50a calculates the power generation P by summing these detected values. FC Calculate.

[0159] In the embodiment described above, in one example, the power generated by the fuel cell equipment 20 P FC This is controlled by controlling the number of operating fuel cell systems. In this example, the generated power P FC This is advantageous from the standpoint of improving the responsiveness of the control. However, the power generated by the fuel cell equipment 20 P FC This can be controlled by controlling the amount of power generated by the operating fuel cell system.

[0160] In the embodiment described above, the database is contained in the memory of the EMS server 52. However, the database may be located outside the EMS server 52. For example, the EMS server 52 may adopt a configuration in which it accesses an external database via the network 60 and retrieves information from the database.

[0161] The embodiments 1 to 10 described above can be combined in any way. For example, the electricity purchase price C BUY Hydrogen unit price C H2、 Electricity purchase price C BUY and hydrogen unit price C H2 The relative magnitudes of renewable energy (RER) RE , CO2 reduction rate RE COA (Carbon Dioxide Amount) reduction per unit time RE , and load tracking rate LFC RE The power supply and demand system 1b may be controlled based on at least two selected from the group consisting of the following. Alternatively, for example, steps S111 and S211 may be swapped with each other, and steps S112 and S212 may be swapped with each other.

[0162] For example, consider a factory that includes a power load 5, where an environmental performance target is set for the last day of a unit period. In this example, the power supply and demand system 1b is controlled according to Embodiment 1 or 5 described above until partway through the unit period. If it is determined that it will be difficult to achieve the target by the last day with the current control, the power supply and demand system 1b is controlled from that point onward according to Embodiment 2, 3, 4, 6, 7, or 8 described above. The unit period is, for example, one month or one year. The determination may be made by a device such as an EMS server 52, or by a person such as a user or administrator of the power supply system 1a and / or power load 5.

[0163] In the embodiment described above, the power load 5 includes a power load and a lighting load. However, the power load 5 may include only one of the power load and the lighting load.

[0164] In the embodiment described above, the EMS server 52 is a cloud server. The network 60 is a wireless network, specifically the internet. However, the EMS server 52 may be an on-premise server. Also, the network 60 may be a wired network.

[0165] In the embodiments described above, the control shown in the flowcharts in Figures 4, 6 to 14 and 16 is performed by the EMS server 52. However, the control shown in these flowcharts may also be performed by a device other than the EMS server 52. The other device is, for example, the control device 50a.

[0166] The order of the steps in the flowchart described above can be changed as needed. For example, the order of steps S101, S102, S103, S104, and S105 in Figures 4, 6 through 8, and 16 can be set arbitrarily.

[0167] In the embodiment described above, green hydrogen is used as fuel in the fuel cell equipment 20. However, the type of hydrogen used as fuel in the fuel cell equipment 20 is not particularly limited. Blue hydrogen or gray hydrogen may be used as fuel in the fuel cell equipment 20. Blue hydrogen is hydrogen produced by decomposing fossil fuels such as natural gas and coal into hydrogen and carbon dioxide using methods such as steam methane reforming and autothermal reforming, and recovering the carbon dioxide before it is released into the atmosphere. Gray hydrogen is hydrogen produced by decomposing fossil fuels into hydrogen and carbon dioxide using methods such as steam methane reforming and autothermal reforming, and releasing the carbon dioxide into the atmosphere.

[0168] In the embodiment described above, the number of solar power generation modules in the solar power generation equipment 10 is one. However, the number of solar power generation modules may be two, three, or four or more.

[0169] In the embodiment described above, the number of fuel cell systems in the fuel cell facility 20 is three. However, the number of fuel cell systems may be one, two, or four or more. The number of fuel cell systems may be ten or more, or fifty or more.

[0170] In the embodiment described above, the number of battery modules in the battery storage system 30 is three. However, the number of battery modules may be one, two, or four or more.

[0171] In the above-described embodiment, power losses such as conversion losses in the DC-DC converter and DC-AC inverter are ignored. It is also possible to perform control while taking power losses into consideration.

[0172] [1-3. Effects, etc.] An example of the device relating to this disclosure controls a power supply system 1b. The power supply system 1b includes a power load 5, a circuit 70, and a power supply system 1a. The power supply system 1a can supply power to the power load 5 via the circuit 70. The power supply system 1a is connected to a commercial power source 2. The power supply system 1a includes a fuel cell facility 20. The device is, for example, an EMS server 52.

[0173] In one example of this disclosure, the power load 5 includes a first load and / or a second load. The first load is driven, for example, by a first voltage. The second load is driven, for example, by a second voltage. The first voltage may be greater than the second voltage, the same as the second voltage, or less than the second voltage. The first load may be, for example, a power load and a lighting load. The second load may be, for example, the other of a power load and a lighting load.

[0174] In one example of this disclosure, the device controls the operation of the power supply system 1a so that the power supplied from the power supply system 1a to the circuit 70 is regulated. The device controls the operation of the power load 5, which consumes the power supplied from the circuit 70 to the power load 5. In this configuration, the control of the power supply system 1a and the control of the power load 5 are performed by a single device. Therefore, consistency between these controls is easily achieved. This is advantageous from the viewpoint of ensuring the operational stability of the power supply and demand system 1b as a whole. Ensuring the operational stability of the power supply and demand system 1b is advantageous from the viewpoint of operating the power supply and demand system 1b cost-effectively.

[0175] In one example of this disclosure, the device controls the power supply system 1a according to the operating status of the power supply and demand system 1b. With this configuration, the power supply system 1a can be operated appropriately according to the operating status. In one specific example of this configuration, the device evaluates the operating status of the power supply and demand system 1b. Then, the device controls the power supply system 1a according to the evaluation.

[0176] Electricity purchase price C BUY Hydrogen unit price C H2 The term "environmental performance" will be explained. Electricity purchase price C BUY This is the unit price for electricity purchased from commercial power source 2 to power supply system 1a. Hydrogen unit price C H2 This is the unit price of hydrogen. Environmental benefits refer to, for example, the renewable energy ratio (RER) in the power supply and demand system 1b. RE , the carbon dioxide reduction rate (COR) in the power supply and demand system 1b RE , or COA (Coronavirus Analysis) reduction amount in power supply and demand system 1b RE In one example of this disclosure, the operating conditions are as follows: electricity purchase price C BUY Hydrogen unit price C H2、 Hydrogen unit price C H2 and electricity purchase price C BUY Relationship, environmental performance, and load following rate LFC in power supply and demand system 1b RE It includes at least one selected from the group consisting of the following.

[0177] In one example of this disclosure, the control of the power supply system 1a is controlled by the hydrogen unit price C H2 electricity purchase price C BUY This includes performing a first power supply in response to a relative increase in hydrogen C. The control of the power supply system 1a is based on the hydrogen unit price C. H2 electricity purchase price C BUY This includes performing a second power supply in response to a relative decrease in power consumption. In the first power supply, power is supplied to the power load 5 from the fuel cell equipment 20 without supplying power to the power load 5 from the commercial power source 2. In the second power supply, power is supplied to the power load 5 from the commercial power source 2 without supplying power to the power load 5 from the fuel cell equipment 20. With this configuration, the electricity purchase price C BUY In accordance with the relative rise in electricity consumption, the cost benefits of supplying electricity by fuel cell equipment 20 are enjoyed, and the electricity purchase price C BUY As the relative decrease in power consumption increases, the cost benefits of supplying power from commercial power source 2 can be enjoyed.

[0178] In one specific example of the above configuration, the device provides the first power supply, with a hydrogen cost of C H2 The electricity purchase price C BUY The following conditions must be met: The device will supply the second power supply at hydrogen unit price C H2 The electricity purchase price C BUY Execute if it is higher than [value].

[0179] In another specific example of the above configuration, the device provides the first power supply, with a hydrogen cost of C H2 The product C obtained by multiplying by the coefficient K. H2 • K is the electricity purchase price C BUY The following conditions must be met: The device will perform the second power supply, multiplying by C. H2 • K is the electricity purchase price C BUY The device executes if the value is higher than [a certain value]. The coefficient K is a positive value and can be either less than or greater than 1. For example, the device receives the coefficient K from terminal 55. With this configuration, the coefficient K can be arbitrarily set from terminal 55. For example, a user of terminal 55, such as a user or administrator of the power supply system 1a and / or power load 5, sets the coefficient K from terminal 55.

[0180] In one example of this disclosure, the control of the power supply system 1a is such that the power generated by the fuel cell equipment 20 P follows the target value in terms of environmental performance.FC This includes controlling the environmental performance. With this configuration, the environmental performance can be made to follow the target value.

[0181] In the above configuration, the environmental performance is based on the renewable energy ratio (RER). RE In that case, the target value is, for example, the target value RER TA This is the renewable energy ratio (RER). RE and target value RER TA This may be the one shown in Figure 6 relating to Embodiment 2, or the one shown in Figure 10 relating to Embodiment 6. Environmental performance is measured by the carbon dioxide reduction rate (COR). RE In that case, the target value is, for example, the target value COR TA This is the carbon dioxide reduction rate (COR). RE and target value COR TA This may be the one shown in Figure 7 relating to Embodiment 3, or the one shown in Figure 11 relating to Embodiment 7. Environmental impact: COA reduction amount RE In that case, the target value is, for example, the target value COA TA This is the COA (Coronavirus Analysis) reduction amount. RE and target value COA TA This may be the one shown in Figure 8 relating to Embodiment 4, or the one shown in Figure 12 relating to Embodiment 8.

[0182] In one example of this disclosure, the device receives a target value from terminal 55. With this configuration, the target value can be arbitrarily set from terminal 55. For example, a user of terminal 55, such as a user or administrator of the power supply system 1a and / or power load 5, sets the target value from terminal 55. This allows the power supply system 1a to be controlled to follow the target value to achieve the environmental conditions desired by the user, administrator, etc.

[0183] In one example of this disclosure, during the first period, the control of the power supply system 1a is controlled by the hydrogen unit price C H2 electricity purchase price C BUY This includes performing a first power supply in response to a relative increase in hydrogen price C. During the first period, the control of the power supply system 1a is performed. H2 electricity purchase price CBUY This includes performing a second power supply in response to a relative decrease in the first period. In the second period following the first period, the power supply system 1a is controlled so that the power generated by the fuel cell equipment 20 P follows the target value. FC This includes controlling the power supply and demand system 1b, for example, when the power supply and demand system 1b is applied to a factory, the factory includes a power load 5, and the factory has set environmental targets for the end of a unit period.

[0184] In one specific example of the above configuration, during the first period, the control of the power supply system 1a is determined regardless of environmental considerations, and the hydrogen unit price C H2 electricity purchase price C BUY This includes performing a first power supply in response to a relative increase in C. During the first period, the control of the power supply system 1a is performed regardless of environmental considerations, with respect to the hydrogen unit price C. H2 electricity purchase price C BUY This includes performing a second power supply in accordance with the relative decrease of C. During the second period, the control of the power supply system 1a is performed according to the hydrogen unit price C. H2 and electricity purchase price C BUY Regardless of the relationship, the power generation P of the fuel cell equipment 20 will be adjusted so that the environmental performance follows the target value. FC This includes controlling.

[0185] In one example of this disclosure, the control of the power supply system 1a is performed by the load following rate LFC. RE The upper limit is LFC THH When it rises across the threshold, the power generated by the fuel cell equipment 20 P FC Decreasing and / or Load Following Rate LFC RE The lower limit is LFC THL When the power output P of the fuel cell equipment 20 decreases across the threshold, FC This includes increasing the load following rate (LFC). RE This is advantageous from the standpoint of suppressing deviations from the appropriate range.

[0186] In one example of this disclosure, the device transmits from terminal 55 to the upper limit LFC THH and / or lower limit LFC THLIt receives the upper limit LFC from terminal 55. According to this configuration, terminal 55 receives the upper limit LFC. THH and / or lower limit LFC THL This can be set arbitrarily. For example, a user of terminal 55 such as a user or administrator of the power supply system 1a and / or power load 5 can set the upper limit LFC from terminal 55. THH and / or lower limit LFC THL This sets the load tracking rate (LFC) from the range desired by users, administrators, etc. RE The power supply system 1a can be controlled so as to suppress deviations.

[0187] In one example of this disclosure, the power load 5 is controlled according to the operating status of the power supply and demand system 1b. With this configuration, the power load 5 can be operated appropriately according to the operating status. In one specific example of this configuration, the device evaluates the operating status of the power supply and demand system 1b. Then, the device controls the power load 5 according to the evaluation.

[0188] In one example of this disclosure, the control of power load 5 includes changing the operating schedule of the first load. Here, the terms low-cost period 201 and high-cost period 202 are used. Low-cost period 201 and high-cost period 202 are defined as the electricity purchase price C on a day prior to the day the change is implemented. BUY There are two types of time zones based on the relative magnitude of the price. The low-cost time zone 201 has a lower electricity purchase price C than the high-cost time zone 202. BUY This is a time when electricity is cheaper. At this time, the device changes the electricity purchase price C BUY Threshold C TH This is executed when the price rises across the threshold. The device makes the change such that, compared to before the change, the operating time of the first load increases during the low-cost time period 201 and decreases during the high-cost time period 202. With this configuration, the electricity purchase price C BUY When the price rises, the resulting cost increase can be mitigated. "Past days" refers to any day from one week before the day the change is implemented to the day before. Controlling power load 5 may further include operating the first load according to the modified operating schedule.

[0189] In one specific example of the above configuration, the device operates the first load according to the modified operating schedule when electricity is being purchased. When electricity is not being purchased, the device operates the first load according to a different operating schedule. This different operating schedule is, for example, the operating schedule before the change.

[0190] In one example of this disclosure, the device is capable of independently changing the power consumption of the first load and the power consumption of the second load. Specifically, "independently changing the power consumption of the first load and the power consumption of the second load" means that the power consumption of one of the first loads or the second load can be fixed while the power consumption of the other can be changed.

[0191] An example of a control method relating to this disclosure is a control method for a power supply system 1b. This control method includes a first step and a second step. In the first step, the operation of the power supply system 1a is controlled so that the power supplied from the power supply system 1a to the circuit 70 is adjusted. In the second step, the operation of the power load 5, which consumes the power supplied from the circuit 70 to the power load 5, is controlled. The first and second steps are performed by a common device, such as an EMS server 52.

[0192] The program according to this example includes instructions to the processor to execute the above control method of the power supply and demand system 1b when executed by the processor. The recording medium according to this example is a computer-readable recording medium on which the above program is recorded. In one example, the program is implemented in a device, and in one specific example, it is implemented in an EMS server 52. The processor is, for example, a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), etc. The recording medium is, for example, a semiconductor recording medium, a magnetic recording medium, a magneto-optical recording medium, an optical recording medium, etc. Semiconductor recording mediums are, for example, SD (Secure Digital) cards, USB (Universal Serial Bus) memory, SSDs (Solid State Drives), etc. Magnetic recording mediums are, for example, HDDs (Hard Disk Drives), flexible disks, etc. Magneto-optical recording mediums are, for example, MOs (Magneto Optical Disks), etc. Optical recording mediums are, for example, CDs (Compact Discs), DVDs (Digital Versatile Discs), etc.

[0193] An example of the device described herein controls a power supply system 1a. The power supply system 1a includes a fuel cell facility 20. The power supply system 1a can supply power to a power load 5 by connecting to a commercial power source 2. The device uses hydrogen at a cost of C H2 electricity purchase price C BUY In response to the relative rise in C, the power supply system 1a is made to perform a first power supply. The device uses hydrogen unit price C H2 electricity purchase price C BUY In response to the relative decrease in power, the power supply system 1a is made to provide a second power supply. This configuration is advantageous from the standpoint of cost-effectively operating the power supply system 1a. The device is, for example, an EMS server 52.

[0194] The power supply system 1a relating to an example of this disclosure has a hydrogen unit price C H2 electricity purchase price CBUY In response to the relative rise in the first power supply, the power supply system 1a will perform the first power supply. H2 electricity purchase price C BUY In response to the relative decrease, a second power supply will be implemented.

[0195] An example of a control method relating to this disclosure is a control method for a power supply system 1a. The control method includes a third step and a fourth step. In the third step, the hydrogen unit price C H2 electricity purchase price C BUY In response to the relative rise in the first power supply, the fourth step is performed. H2 electricity purchase price C BUY The second power supply will be implemented in accordance with the relative decrease in power.

[0196] The program according to this example includes instructions to the processor to execute the above control method of the power supply system 1a when executed by the processor. The recording medium according to this example is a computer-readable recording medium on which the above program is recorded. In one example, the program is implemented in a device, and in one specific example, it is implemented in an EMS server 52. The processor is, for example, a CPU, ASIC, FPGA, etc. The recording medium is, for example, a semiconductor recording medium, a magnetic recording medium, a magneto-optical recording medium, an optical recording medium, etc. Examples of semiconductor recording media are SD cards, USB memory, SSDs, etc. Examples of magnetic recording media are HDDs, flexible disks, etc. Examples of magneto-optical recording media are MOs, etc. Examples of optical recording media are CDs, DVDs, etc. [Industrial applicability]

[0197] The technology disclosed herein is applicable to factories and the like. The technology disclosed herein is suitable for cost-effectively operating systems through which electricity flows. Systems through which electricity flows include, for example, power supply and demand systems and, for example, power supply systems. Systems through which electricity flows can be systems through which electricity (high-voltage electricity) as energy flows.

Claims

1. A control method for a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, The aforementioned power supply system is connected to the commercial power supply, The power supply system includes a fuel cell facility, Controlling the operation of the power supply system so that the power supplied from the power supply system to the circuit is adjusted, This includes controlling the operation of the power load, which involves the consumption of power supplied to the power load from the circuit, The control of the power supply system and the control of the power load are performed by a common device. When the renewable energy ratio in the aforementioned power supply and demand system, the carbon dioxide reduction rate in the aforementioned power supply and demand system, or the amount of carbon dioxide reduction in the aforementioned power supply and demand system is defined as environmental performance, The control of the power supply system includes controlling the power generated by the fuel cell equipment so that the environmental performance follows a target value. Control method.

2. The unit price of hydrogen is defined as the hydrogen unit price, When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, The control of the power supply system is The first power supply is to be performed in accordance with the relative increase in the electricity purchase price relative to the hydrogen price, This includes performing a second power supply in accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. The control method according to claim 1.

3. A method for controlling a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, The aforementioned power supply system is connected to the commercial power supply, The power supply system includes a fuel cell facility, Controlling the operation of the power supply system so that the power supplied from the power supply system to the circuit is adjusted, This includes controlling the operation of the power load, which involves the consumption of power supplied to the power load from the circuit, The control of the power supply system and the control of the power load are performed by a common device. The unit price of hydrogen is defined as the hydrogen unit price. The unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price. When the renewable energy ratio in the aforementioned power supply and demand system, the carbon dioxide reduction rate in the aforementioned power supply and demand system, or the amount of carbon dioxide reduction in the aforementioned power supply and demand system is defined as environmental performance, During the first period, the control of the power supply system is The first power supply is to be performed in accordance with the relative increase in the electricity purchase price relative to the hydrogen price, This includes performing a second power supply in accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power from the fuel cell equipment to the power load. In a second period following the first period, the control of the power supply system includes controlling the power generated by the fuel cell equipment so that the environmental performance follows a target value. Control method.

4. The control of the power supply system is performed according to the operating status of the power supply system. The control method according to any one of claims 1 to 3.

5. The control of the power supply system is When the load following rate in the aforementioned power supply and demand system rises above the upper limit, the power generated by the fuel cell equipment is reduced, and / or When the load following rate falls below a lower limit, the power generated by the fuel cell equipment is increased. The control method according to any one of claims 1 to 3.

6. The control of the power load is performed according to the operating status of the power supply and demand system. The control method according to any one of claims 1 to 3.

7. The power load includes a first load, The control of the power load includes changing the operating schedule of the first load. The unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price. Based on the relative magnitudes of the electricity purchase price on days prior to the day the aforementioned change is implemented, two types of time periods are defined as the low-cost time period and the high-cost time period, respectively, where the electricity purchase price is relatively low and the electricity purchase price is relatively high. The aforementioned change is implemented when the electricity purchase price rises above a threshold. The aforementioned change is implemented such that, compared to before the change, the operating time of the first load increases during the low-cost period and the operating time of the first load decreases during the high-cost period. The control method according to any one of claims 1 to 3.

8. A device for controlling a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, The aforementioned power supply system is connected to the commercial power supply, The power supply system includes a fuel cell facility, The operation of the power supply system is controlled so that the power supplied from the power supply system to the circuit is adjusted. Controlling the operation of the power load, which involves the consumption of power supplied to the power load from the aforementioned circuit, When the renewable energy ratio in the aforementioned power supply and demand system, the carbon dioxide reduction rate in the aforementioned power supply and demand system, or the amount of carbon dioxide reduction in the aforementioned power supply and demand system is defined as environmental performance, The power generated by the fuel cell equipment is controlled so that the aforementioned environmental performance follows the target value. Device.

9. The unit price of hydrogen is defined as the unit price of hydrogen, When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, The aforementioned device is In response to the relative increase in the electricity purchase price relative to the hydrogen price, the power supply system is instructed to perform a first power supply. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, the power supply system is instructed to perform a second power supply. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. The apparatus according to claim 8.

10. A device for controlling a power supply and demand system comprising a power load, an electrical circuit, and a power supply system capable of supplying power to the power load via the electrical circuit, The aforementioned power supply system is connected to the commercial power supply, The power supply system includes a fuel cell facility, The operation of the power supply system is controlled so that the power supplied from the power supply system to the circuit is adjusted. Controlling the operation of the power load, which involves the consumption of power supplied to the power load from the aforementioned circuit, The unit price of hydrogen is defined as the hydrogen unit price. The unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price. When the renewable energy ratio in the aforementioned power supply and demand system, the carbon dioxide reduction rate in the aforementioned power supply and demand system, or the amount of carbon dioxide reduction in the aforementioned power supply and demand system is defined as environmental performance, During the first period, In response to the relative increase in the electricity purchase price relative to the hydrogen price, the power supply system is instructed to perform a first power supply. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, the power supply system is instructed to perform a second power supply. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power from the fuel cell equipment to the power load. In the second period following the first period, the power generated by the fuel cell equipment is controlled so that the environmental performance follows the target value. Device.

11. A power supply system comprising a fuel cell facility, capable of supplying power to a power load in connection with a commercial power source, and capable of supplying power to the power load via an electrical circuit, The power supply system operates so that the power supplied from the power supply system to the circuit is adjusted. When the ratio of renewable energy in the power supply and demand system, the carbon dioxide reduction rate in the power supply and demand system, or the amount of carbon dioxide reduction in the power supply and demand system are defined as environmental performance, The fuel cell equipment generates electricity so that the aforementioned environmental performance follows the target value. Power supply system.

12. The unit price of hydrogen is defined as the unit price of hydrogen, When the unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price, In response to the relative increase in the electricity purchase price relative to the hydrogen price, the first power supply is performed. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, a second power supply will be implemented. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power to the power load from the fuel cell equipment. The power supply system according to claim 11.

13. A power supply system comprising a fuel cell facility, capable of supplying power to a power load in connection with a commercial power source, and capable of supplying power to the power load via an electrical circuit, The power supply system operates so that the power supplied from the power supply system to the circuit is adjusted. The unit price of hydrogen is defined as the hydrogen unit price. The unit price of electricity purchased from the commercial power source to the power supply system is defined as the electricity purchase unit price. When the ratio of renewable energy in the power supply and demand system, the carbon dioxide reduction rate in the power supply and demand system, or the amount of carbon dioxide reduction in the power supply and demand system are defined as environmental performance, During the first period, In response to the relative increase in the electricity purchase price relative to the hydrogen price, the first power supply will be executed. In accordance with the relative decrease in the electricity purchase price relative to the hydrogen price, a second power supply will be implemented. In the first power supply, power is supplied to the power load from the fuel cell equipment without supplying power to the power load from the commercial power source. In the second power supply, power is supplied to the power load from the commercial power source without supplying power from the fuel cell equipment to the power load. In the second period following the first period, the fuel cell equipment generates electricity so that the environmental performance follows the target value. Power supply system.

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