Operation method of power supply system, and power supply system

Abstract

To provide a new technique advantageous in terms of its ability to respond to sudden fluctuations in the power supplied to a power load.SOLUTION: The operation method of a power supply system 1a includes the following (i) and (ii). (i)The power generation of solar power generation equipment 10 and the power generation of fuel cell equipment 20 by receiving a control signal via a network 60. (ii) Current or power measurement data in the power supply system fluctuates according to the power supplied to a power load 5 connected to the power supply system 1a, and the power measurement data is acquired via no network 60. Based on this measurement data, the charging and discharging of the battery equipment 30 is controlled.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for operating an electric power supply system and an electric power supply system. [Background technology]

[0002] Patent Document 1 describes a distributed power generation system. This distributed power generation system includes a natural energy power generation device, a private power generation device, and a storage battery. The natural energy power generation device is, for example, a solar power generation device. The private power generation device is, for example, a fuel cell cogeneration device. Power generation by the private power generation device, reverse current to the commercial power source, storage of power in the storage battery, discharge from the storage battery, and acquisition of power from the commercial power source are adjusted according to the relationship between the generated power of the natural energy power generation, the power load of the consumer, and the charge state of the storage battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-259303 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a novel technology that is advantageous in terms of followability to sudden fluctuations in power supplied to a power load. [Means for solving the problem]

[0005] The method for operating a power supply system according to the present disclosure includes: receiving a control signal via a network to control power generation of the solar power generation facility and power generation of the fuel cell facility; The method includes obtaining measurement data of current or power in the power supply system, which varies depending on the power supplied to a power load connected to the power supply system, without going through the network, and controlling the charging and discharging of the battery equipment based on the measurement data.

[0006] The power supply system according to the present disclosure includes: Solar power generation equipment, A fuel cell facility; A battery storage facility; a measuring device for measuring a current or power in the power supply system that varies in response to a variation in power supplied to a power load connected to the power supply system; A first control device that controls charging and discharging of the storage battery equipment; A communication interface connected to a network, the communication interface receives, via the network, a control signal for controlling power generation by the solar power generation facility and power generation by the fuel cell facility; The first control device acquires measurement data indicating the measurement results of the measuring device without going through the network, and controls charging and discharging of the storage battery equipment based on the measurement data. Effect of the Invention

[0007] The technology disclosed herein is a novel technology that is advantageous in terms of the ability to follow sudden fluctuations in power supplied to a power load. [Brief description of the drawings]

[0008] [Figure 1] A configuration diagram of a power supply system according to a first embodiment. [Diagram 2] FIG. 1 is a diagram showing an operation procedure of the power supply system according to the first embodiment. [Diagram 3] FIG. 1 is a diagram showing an example of operation of a power supply system according to a first embodiment. [Figure 4] A configuration diagram of a power supply system according to a second embodiment. [Diagram 5] FIG. 13 is a diagram showing an operation procedure of a power supply system according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (The knowledge and other information that formed the basis of this disclosure) At the time when the present inventors came up with the present disclosure, a power supply system including a photovoltaic power generation system, a fuel cell system, and a storage battery system and connected to commercial power had been under consideration. For example, in the distributed power generation system described in Patent Document 1, when the power generated by natural energy power generation such as photovoltaic power generation exceeds the power load of a consumer, the excess power is stored in the storage battery. In addition, when the total power generated by a private power generation system such as a fuel cell cogeneration system and the power generated by natural energy power generation is insufficient for the power load of a consumer, the shortage of power is made up by discharging from the storage battery. In the above-mentioned distributed power generation system, it is considered that the control of power generation in the photovoltaic power generation system and the fuel cell cogeneration system and the control of charging and discharging the storage battery are centrally controlled.

[0010] In order to reduce the introduction cost of the power supply system, it is possible to use a control device connected via a network as a control device for operating the power supply system. In this case, as in the distributed power generation system described in Patent Document 1, it is also possible to centrally control the power generation of the photovoltaic power generation equipment and the fuel cell equipment, and the charge and discharge control of the storage battery equipment by the control device connected via a network.

[0011] On the other hand, according to the inventors' research, it has been newly discovered that centralized control using control devices connected via a network may result in the power supply system being unable to adequately keep up with sudden fluctuations in the power supplied to power loads connected to the power supply system.

[0012] In view of these circumstances, the present inventors have conducted extensive research into technology that can improve the ability of a power supply system equipped with a photovoltaic power generation system, a fuel cell system, and a storage battery system to respond to sudden fluctuations in the power supplied to the power load. As a result, it has been newly discovered that the ability of the power supply system to respond to sudden fluctuations in the power supplied to the power load can be improved by establishing a predetermined relationship between the control of power generation by the photovoltaic power generation system and the fuel cell system, and the control of charging and discharging by the storage battery system.

[0013] The present inventors have further investigated the ability of a power supply system to follow rapid fluctuations in power supplied to a power load, and have come up with the technology according to the present disclosure.

[0014] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming more redundant than necessary and to facilitate understanding by those skilled in the art.

[0015] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims.

[0016] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIG. 1 to FIG.

[0017] [1-1. Configuration] FIG. 1 is a configuration diagram of a power supply system according to the first embodiment. As shown in FIG. 1, the power supply system 1a includes a photovoltaic power generation facility 10, a fuel cell facility 20, a storage battery facility 30, a measuring device 3a, a control device 50b, and a communication interface 40. The power supply system 1a is connected to, for example, a commercial power source 2. The measuring device 3a measures the current or power in the power supply system 1a, which varies depending on the power supplied to the power load 5 connected to the power supply system 1a. The measuring device 3a may be an ammeter or a wattmeter. The communication interface 40 is connected to a network 60, and receives a control signal for controlling the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 via the network 60. The control device 50b acquires measurement data indicating the measurement result of the measuring device 3a without going through the network 60, and controls the charging and discharging of the storage battery facility 30 based on the measurement data.

[0018] As shown in FIG. 1, the solar power generation facility 10 includes, for example, a solar power generation module 11, a DCDC converter 12, a DCAC inverter 13, and a control device 50c. The solar power generation module 11 includes a solar cell panel. Examples of the solar cell include a monocrystalline silicon solar cell, a polycrystalline silicon solar cell, a thin-film silicon solar cell, a CIS solar cell, a CIGS solar cell, an organic semiconductor solar cell, and a perovskite solar cell. The solar power generation facility 10 may include, for example, a plurality of solar power generation modules 11. The DCDC converter 12 converts the DC power generated in the solar power generation module 11 into DC power of a desired voltage. The DCAC inverter 13 converts the DC power output from the DCDC converter 12 into AC power suitable for power supply to the outside of the solar power generation facility 10. This AC power is supplied to, for example, an electric circuit 70 outside the solar power generation facility 10.

[0019] The control device 50c is connected to the communication interface 40 by wire or wirelessly so as to be able to communicate with it. For example, the control device 50c controls the operation of the DCDC converter 12 and the DCAC inverter 13 according to a control signal received by the communication interface 40. The control device 50c also transmits data indicating the power generation w2 in the photovoltaic power generation facility 10 to the communication interface 40. This data may be, for example, data indicating the current or power output from the photovoltaic power generation facility 10. The photovoltaic power generation facility 10 may be equipped with an ammeter or a wattmeter to acquire such data. The control device 50c is, for example, a computer equipped with a storage device in which a program required for the operation of the photovoltaic power generation facility 10 is stored, and a processor that reads out and executes the program from the storage device.

[0020] The fuel cell equipment 20 includes, for example, a plurality of fuel cell systems 20a, 20b, and 20c. Each of the fuel cell systems 20a, 20b, and 20c includes, for example, a fuel cell stack 21, a DCDC converter 22, a DCAC inverter 23, and a control device 50d. Examples of fuel cells include a polymer electrolyte fuel cell, a solid oxide fuel cell, a phosphoric acid fuel cell, and a molten carbonate fuel cell. A fuel cell stack 21 is supplied with a fuel gas and an oxidant gas, and electric power is generated by the reaction of the fuel gas and the oxidant gas in the fuel cell stack 21, and the DC power is output to the outside of the fuel cell stack 21. The DCDC converter 22 converts the DC power output from the fuel cell stack 21 into DC power of a desired voltage. The DCAC inverter 23 converts the DC power output from the DCDC converter 22 into AC power suitable for power supply to the outside of the fuel cell equipment 20. The AC power is supplied to, for example, an electric circuit 70 outside the fuel cell equipment 20.

[0021] The control device 50d is connected to the communication interface 40 by wire or wirelessly so as to be able to communicate with it. For example, the control device 50d performs control necessary for the operation of the fuel cell system 20a, 20b, or 20c according to a control signal received from the control device 50a. For example, the control device 50d controls the operation of the DCDC converter 22, the DCAC inverter 23, and auxiliary equipment (not shown). Examples of the auxiliary equipment are a pump, a blower, and a valve. The pump and the blower send fuel gas and oxidant gas toward the fuel cell stack 21, for example. The control device 50d also transmits data indicating the power generated in the fuel cell system 20a, 20b, or 20c toward the communication interface 40. This data may be, for example, data indicating the magnitude of the current output from the fuel cell system 20a, 20b, or 20c. The control device 50d is, for example, a computer including a storage device in which a program necessary for the operation of the fuel cell system 20a, 20b, or 20c is stored, and a processor that reads out and executes the program from the storage device.

[0022] The DCAC inverter 23 may convert AC power supplied to the fuel cell system 20a, 20b, or 20c from an electric circuit 70 outside the fuel cell equipment 20 into DC power. This DC power is used, for example, to start up the fuel cell system 20a, 20b, or 20c. For example, the DC power is used to operate auxiliary equipment.

[0023] The fuel used in the fuel cell equipment 20 is, for example, pure hydrogen. In this case, the fuel cell equipment 20 further includes a tank (not shown) in which pure hydrogen is stored. Hydrogen gas is supplied from this tank as fuel gas to the fuel cell stack 21. The fuel used in the fuel cell equipment 20 may contain a hydrocarbon gas such as methane gas, propane gas, or butane gas. In this case, the fuel cell equipment 20 includes a reformer. A hydrogen-containing gas is generated as fuel gas from the hydrocarbon gas in the reformer, and the hydrogen-containing gas is supplied to the fuel cell stack 21. Examples of fuels containing hydrocarbon gas are city gas and LP gas.

[0024] The storage battery equipment 30 includes, for example, a storage battery module 31, a bidirectional DCDC converter 32, a DCAC inverter 33, and a control device 50b. The storage battery equipment 30 includes, for example, a plurality of storage battery modules 31 and a plurality of bidirectional DCDC converters 32. For example, one bidirectional DCDC converter 32 is associated with and connected to one storage battery module 31. A specific terminal of the bidirectional DCDC converter 32 is connected to a specific terminal of the DCAC inverter 33. The storage battery module 31 includes a plurality of storage batteries. The storage batteries are not limited to a specific type of storage battery. Examples of the storage batteries are a lithium ion battery, a redox flow battery, and a sodium sulfur battery.

[0025] When charging the battery equipment 30, AC power supplied from an electric circuit 70 outside the battery equipment 30 is converted into DC power by the DCAC inverter 33. The DC power obtained by the DCAC inverter 33 is converted into DC power of a voltage suitable for charging the battery module 31 by the bidirectional DCDC converter 32. The DC power output from the DCDC converter 32 is supplied to the battery module 31 to charge the battery module 31. In this case, the potential V1 at a specific terminal of the bidirectional DCDC converter 32 is adjusted to be lower than the potential V2 at a specific terminal of the DCAC inverter 33.

[0026] When discharging the battery equipment 30, the potential V1 at a specific terminal of the bidirectional DCDC converter 32 is adjusted to be higher than the potential V2 at a specific terminal of the DCAC inverter 33. As a result, the power stored in the battery module 31 is discharged as DC power. This DC power is converted into DC power of a desired voltage in the bidirectional DCDC converter 32. The DC power output from the bidirectional DCDC converter 32 is converted into AC power in the DCAC inverter 33, which is suitable for supplying power outside the battery equipment 30. The AC power output from the DCAC inverter 33 is supplied to an electric circuit 70 outside the battery equipment 30.

[0027] The control device 50b is connected to the measuring device 3a by wire or wirelessly so that measurement data indicating the measurement results of the measuring device 3a can be acquired without going through the network 60. The control device 50b performs control necessary for the operation of the battery equipment 30 based on the measurement data indicating the measurement results of the measuring device 3a. For example, the control device 50b controls the operation of the bidirectional DCDC converter 32 and the DCAC inverter 33. The control device 50b is, for example, a computer including a storage device in which a program necessary for the operation of the battery equipment 30 is stored, and a processor that reads out and executes the program from the storage device.

[0028] The control device 50b is communicatively connected to the communication interface 40, for example, by wire or wirelessly. The control device 50b transmits data indicating the amount of stored power in the storage battery equipment 30 to the communication interface 40, for example.

[0029] The measuring device 3a measures, for example, the power w1 output from the power supply system 1a to the commercial power source 2. The measuring device 3a may measure the current output from the power supply system 1a to the commercial power source 2.

[0030] 1, the power supply system 1a further includes, for example, a distribution board 4. The measuring device 3a measures, for example, the power or current at a position on the electric circuit 70 that is closer to the commercial power source 2 than the connection point with the photovoltaic power generation equipment 10, the connection point with the fuel cell equipment 20, and the connection point with the storage battery equipment 30. The measuring device 3a is connected to the communication interface 40 by wire or wirelessly.

[0031] As shown in FIG. 1, in addition to the communication interface 40, the control device 50a and the energy management system (EMS) server 52 are connected to the network 60. In other words, the communication interface 40, the control device 50a, and the EMS server 52 can communicate with each other via the network 60. The EMS server 52 may be configured separately from the control device 50a, or may be configured integrally with the control device 50a. The network 60 is, for example, a network including an electric communication line such as the Internet. The network 60 may include a public line or a dedicated line. The network 60 is, for example, a network capable of communication by TCP / IP. The network 60 may be, for example, a network capable of communication by Hypertext Transfer Protocol (HTTP), Hypertext Transfer Protocol Secure (HTPS), or Web Application Programming Interface (WEB-API).

[0032] The control device 50a may be configured as a server, or may be configured by a computer on which a general-purpose operating system is installed.

[0033] The EMS server 52 transmits instructions regarding the operation mode of the power supply system 1a to the control device 50a. The control device 50a receives instructions regarding the operation mode from the EMS server 52 via the network 60. In this case, the control device 50a determines the control contents of the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 according to the instructed operation mode. Based on the control contents, the control device 50a transmits control signals required for the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 to the control devices 50c and 50d, respectively, via the network 60 and the communication interface 40.

[0034] [1-2. Operation] An example of the operation of the power supply system 1a will be described. FIG. 2 shows the procedure of operation of the power supply system according to the first embodiment. As shown in FIG. 2, when the control device 50a receives an operation instruction in the private power generation consumption mode from the EMS server 52 (see step S11), it acquires measurement data of the measuring device 3a via the communication interface 40 and the network 60 (see step S12). In other words, the communication interface 40 transmits the measurement data to the control device 50a. This measurement data indicates, for example, the power w1 output from the power supply system 1a to the commercial power source 2. In addition, the control device 50a acquires data indicating the actual performance of the power generation w2 of the photovoltaic power generation facility 10 from the control device 50c via the communication interface 40 and the network 60 (see step S13). This data indicates, for example, the power output from the photovoltaic power generation facility 10.

[0035] The control device 50a, for example, identifies the power generation w2 of the photovoltaic power generation facility 10 based on the above measurement data, and determines a target value PB of the power generation of the fuel cell facility 20 according to the power generation w2 and the power demand (see step S14). The power demand is determined, for example, as the difference (w2+w3)-w1 obtained by subtracting power w1 from the sum of the power generation w2 of the photovoltaic power generation facility 10 and the power generation w3 of the fuel cell facility 20. The control device 50a determines the target value PB, for example, so that the power demand-(w2+w3) becomes zero. The control device 50a generates control signals for the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 according to the determination of the target value PB. The control signals for the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 are sent to the control device 50c and the control device 50d, respectively, via the network 60 and the communication interface 40 (see steps S15 and S16). As a result, the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 are controlled.

[0036] Thereafter, the control device 50a acquires data indicating the actual result of the power generation w2 of the photovoltaic power generation facility 10 and data indicating the actual result of the power generation w3 of the fuel cell facility 20 from the control device 50b and the control device 50c, respectively (see steps S17 and S18). These data are data indicating the power output from the photovoltaic power generation facility 10 and the fuel cell facility 20. In addition, the control device 50a acquires measurement data of the measuring device 3a via the communication interface 40 and the network 60 (see step S19). Next, the control device 50a specifies the power generation w2 of the photovoltaic power generation facility 10 based on the measurement data in the same manner as in step S14, and determines a target value PB of the power generation of the fuel cell facility 20 according to the power generation w2 and the power demand. The target value PB is determined so that the power demand-(w2+w3) is zero. The control device 50a generates a control signal according to the determination of the target value PB. The generated control signal is sent to the control device 50c and the control device 50d in the same manner as in steps S15 and S16. Thereafter, the processes from steps S17 to S20 and the generation and transmission of the control signal are repeated at a predetermined time interval, which may be, for example, 30 seconds.

[0037] As shown in FIG. 2, the control device 50b acquires the measurement data of the measuring device 3a without going through the network 60 (see step S21). This measurement data indicates, for example, power w1. The control device 50a controls the charging and discharging of the storage battery equipment 30 based on this measurement data. For example, the control device 50a controls the charging and discharging of the storage battery equipment 30 so that the power w1 becomes zero (step S22). When the power w1 is a positive value, the control device 50b charges the storage battery equipment 30, and when the power w1 is a negative value, the control device 50b discharges the storage battery equipment 30. Thereafter, steps S21 and S22 are repeated at a predetermined time interval. This time interval is, for example, 0.1 microseconds to 2 seconds.

[0038] The target value PB in steps S14 and S20 may be determined so that the sum of the generated power w2 and the target value PB is the following power. This power is a power obtained by subtracting the first power from a target value of the output power of the power supply system 1a for the power consumption of the power load 5. The first power is a power that can be supplied from the storage battery equipment 30 in accordance with the fluctuation of the power consumption of the power load 5. In this case, a control signal for the power generation of the photovoltaic power generation equipment 10 and the power generation of the fuel cell equipment 20 is generated according to the target value PB determined in this way. Therefore, the photovoltaic power generation equipment 10 and the fuel cell equipment 20 generate power obtained by subtracting the first power from the target value in response to receiving the control signal. The target value of the output power of the power supply system 1a for the power consumption of the power load 5 may be a value corresponding to 80% to 100%, a value corresponding to 80% to 99%, a value corresponding to 80% to 95%, or a value corresponding to 80% to 90% of the power consumption of the power load 5.

[0039] 3 shows an example of the operation of the power supply system according to the first embodiment. When the power consumption PL of the power load 5 is smaller than the generated power w2 of the solar power generation equipment 10, the control device 50a stops the operation of the fuel cell equipment 20. The control device 50b charges the storage battery equipment 30 when possible, and puts the storage battery equipment 30 on hold when the current amount of stored electricity has reached a maximum value. When the power consumption PL is smaller than the generated power w2, the fuel cell equipment 20 may be operated depending on the charging state of the storage battery equipment 30. When the power consumption PL is greater than the generated power w2 and the power consumption PL is smaller than the ratio of the generated power w2 to the maximum generated power P of the fuel cell equipment 20, the control device 50b stops the operation of the fuel cell equipment 20. FCMAX If the power consumption PL is less than the sum of the generated power w2 and the maximum generated power P of the fuel cell equipment 20, the control device 50b discharges the battery equipment 30 in accordance with the fluctuation of the power consumption PL of the power load 5. The control device 50a controls the fuel cell equipment 20 to generate power so as to make up for the shortfall of the generated power w2 relative to the power demand. FCMAX If the power generation capacity is greater than the sum of the power generation capacity and the power consumption, the control device 50a controls the fuel cell equipment 20 to the maximum power generation capacity P FCMAX In addition, the control device 50b controls the fuel cell equipment 20 to generate power at a rate of 1000 W. ... FCMAX In these cases, the power supply system 1a can supply the necessary power to the power load 5 without power supply from the commercial power source 2. When the power consumption PL is the sum of the generated power w2 and the maximum generated power P FCMAX If the charge amount is greater than the sum of the charge amount and the charge amount is zero, reception of power from the commercial power source 2 is permitted, and power from the commercial power source 2 is supplied to the power load 5 in proportion to the power shortage.

[0040] [1-3. Effects, etc.] As described above, in the present embodiment, the method of operating the power supply system 1a includes the following (i) and (ii). (i) A control signal is received via the network 60 to control power generation by the photovoltaic power generation facility 10 and power generation by the fuel cell facility 20 . (ii) Measurement data of the current or power in the power supply system 1a, which varies depending on the power supplied to the power load 5 connected to the power supply system 1a, is obtained without going through the network 60, and the charging and discharging of the battery equipment 30 is controlled based on this measurement data.

[0041] As a result, power generation by the photovoltaic power generation equipment 10 and the fuel cell equipment 20 is controlled in accordance with control signals via the network 60, while charging and discharging by the battery storage equipment 30 is controlled based on measurement data acquired without going through the network 60. Therefore, the charging and discharging control of the battery storage equipment 30 can easily follow sudden fluctuations in the power supplied to the power load 5, and this operating method is advantageous from the viewpoint of followability to sudden fluctuations in the power supplied to the power load 5.

[0042] As in this embodiment, the network 60 may be a network capable of communication according to TCP / IP.

[0043] This allows the control signal to be acquired using the network 60 that is communicable according to TCP / IP. This tends to reduce the introduction cost of the power supply system 1a.

[0044] As in this embodiment, the network 60 may be a network capable of communication via HTTP, HTTPS, or WEB-API.

[0045] This allows the control signal to be acquired using HTTP, HTTPS, or WEB-API, which tends to reduce the introduction cost of the power supply system 1a.

[0046] As in this embodiment, the power supply system 1a is connected to a commercial power source, and the measurement data may include measurement data of a current or power output from the power supply system 1a to the commercial power source 2.

[0047] Thereby, for example, the measurement data of current and power for preventing reverse power flow can be used for controlling charging and discharging of the storage battery equipment 30. Therefore, the introduction cost of the power supply system 1a tends to be low.

[0048] As in this embodiment, the control period for charging and discharging the storage battery equipment 30 may be shorter than the control periods for power generation by the photovoltaic power generation equipment 10 and the fuel cell equipment 20.

[0049] This makes it easier for the charge / discharge control of the battery equipment 30 to follow rapid fluctuations in the power supplied to the power load 5, and tends to reduce communication traffic on the network 60.

[0050] As in this embodiment, the method of operating the power supply system 1 a may include transmitting measurement data to the network 60.

[0051] This allows the measurement data to be transmitted to devices connected to the network 60. Therefore, the measurement data can be used to control the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20, for example.

[0052] As in this embodiment, the control signal is generated based on measurement data acquired via network 60 .

[0053] This makes it possible to generate control signals for controlling the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 based on the measurement data. Therefore, the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 can be controlled in accordance with the fluctuation of the power supplied to the power load 5.

[0054] As in this embodiment, the frequency with which measurement data is acquired without passing through the network 60 for controlling charging and discharging of the battery equipment 30 is higher than the frequency with which the measurement data is transmitted toward the network 60.

[0055] This makes it easier for the charge / discharge control of the battery equipment 30 to follow rapid fluctuations in the power supplied to the power load 5, and tends to reduce communication traffic on the network 60.

[0056] As described above, in this embodiment, the power supply system 1a includes the photovoltaic power generation equipment 10, the fuel cell equipment 20, the storage battery equipment 30, the measuring device 3a, the control device 50b (first control device), and the communication interface 40. The measuring device 3a measures the current or power in the power supply system 1a that varies according to the variation of the power supplied to the power load 5 connected to the power supply system 1a. The control device 50b controls the charging and discharging of the storage battery equipment 30. The communication interface 40 is connected to the network 60. The communication interface 40 receives control signals for controlling the power generation of the photovoltaic power generation equipment 10 and the power generation of the fuel cell equipment 20 via the network 60. The control device 50b acquires measurement data indicating the measurement results of the measuring device 3a without going through the network 60, and controls the charging and discharging of the storage battery equipment 30 based on the measurement data.

[0057] As a result, power generation by the photovoltaic power generation equipment 10 and the fuel cell equipment 20 is controlled in accordance with control signals via the network 60, while charging and discharging by the battery storage equipment 30 is controlled based on measurement data acquired without via the network 60. Therefore, the charging and discharging control of the battery storage equipment 30 can easily follow sudden fluctuations in the power supplied to the power load 5, and the power supply system 1a is advantageous in terms of the ability to follow sudden fluctuations in the power supplied to the power load 5.

[0058] As in this embodiment, the network 60 may be a network capable of communication according to TCP / IP.

[0059] This allows the control signal to be acquired using the network 60 that is communicable according to TCP / IP. This tends to reduce the introduction cost of the power supply system 1a.

[0060] As in this embodiment, the network 60 may be a network capable of communication via HTTP, HTTPS, or WEB-API.

[0061] This allows the control signal to be acquired using HTTP, HTTPS, or WEB-API, which tends to reduce the introduction cost of the power supply system 1a.

[0062] As in this embodiment, the power supply system 1a may be interconnected with a commercial power source 2, and the measuring device 3 may measure the current or power output from the power supply system 1a to the commercial power source 2.

[0063] Thereby, for example, the measurement data of current and power for preventing reverse power flow can be used for controlling charging and discharging of the storage battery equipment 30. Therefore, the introduction cost of the power supply system 1a tends to be low.

[0064] As in this embodiment, the control device 50b may control the charging and discharging of the storage battery equipment 30 at a control period shorter than the control periods of the power generation of the solar power generation equipment 10 and the power generation of the fuel cell equipment 20.

[0065] This makes it easier for the charge / discharge control of the battery equipment 30 to follow rapid fluctuations in the power supplied to the power load 5, and tends to reduce communication traffic on the network 60.

[0066] As in this embodiment, the communication interface 40 may transmit the measurement data to a control device 50 a (second control device) connected to the network 60 .

[0067] This allows the control device 50a to acquire the network information via the network 60. Therefore, the measurement data can be used to control the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20, for example.

[0068] As in this embodiment, the control device 50 a may generate a control signal based on measurement data acquired via the network 60 .

[0069] This makes it possible to generate control signals for controlling the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 based on the measurement data. Therefore, the power generation of the photovoltaic power generation facility 10 and the power generation of the fuel cell facility 20 can be controlled in accordance with fluctuations in the power consumption of the power load 5.

[0070] As in this embodiment, the control device 50b may acquire measurement data more frequently than the control device 50a.

[0071] This makes it easier for the charge / discharge control of the battery equipment 30 to follow rapid fluctuations in the power supplied to the power load 5, and tends to reduce communication traffic on the network 60.

[0072] (Embodiment 2) Hereinafter, the second embodiment will be described with reference to Figs. 4 and 5. The power supply system 1b according to the second embodiment is configured similarly to the power supply system 1a according to the first embodiment, except for the parts that will be particularly described. The components of the power supply system 1b that are the same as or correspond to the components of the power supply system 1a are given the same reference numerals, and detailed description will be omitted. The description of the first embodiment also applies to the second embodiment, unless there is a technical contradiction.

[0073] [2-1. Configuration] 4, the power supply system 1b further includes a measuring device 3b. The measuring device 3b measures the power or current at a position on the electric circuit 70 that is closer to the power load 5 than the connection point with the photovoltaic power generation equipment 10, the connection point with the fuel cell equipment 20, and the connection point with the storage battery equipment 30. The measuring device 3b measures, for example, the power w4 at this position. The measuring device 3a is connected to the communication interface 40 by wire or wirelessly.

[0074] [2-2. Operation] 5 shows the procedure of operation of the power supply system 1b according to the embodiment 2. This procedure of operation is performed in the same manner as the procedure of operation of the power supply system 1a according to the embodiment 1, except for the parts that will be particularly described.

[0075] 5, in steps S12 and S19, the control device 50a acquires the measurement data of the measuring device 3b, not the measurement data of the measuring device 3a, via the communication interface 40 and the network 60. The measurement data indicates, for example, power w4.

[0076] The control device 50a, for example, treats the power w4 as a power demand and determines the target value PB so that the sum of the generated powers w2+w3 becomes equal to the power w4 (see steps S14 and S20).

[0077] [2-3. Effects, etc.] As described above, in the present embodiment, in the method of operating power supply system 1a, the measurement data of measuring device 3b may be transmitted to network 60, instead of the measurement data of measuring device 3a.

[0078] This allows measurement data of the current or power in the power supply system 1a, which varies depending on the power supplied to the power load 5, to be transmitted to the network 60 even if a measuring device cannot be placed in a position close to the commercial power source 2.

[0079] (Other embodiments) As described above, the first and second embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made.

[0080] In the first and second embodiments, as an example of the method of operating the power supply system 1a, the power consumption PL is calculated based on the power generation w2 and the maximum power generation P FCMAXand the amount of stored power is zero, the reception of power from the commercial power source 2 is permitted. The operation method of the power supply system 1a may be any method capable of acquiring measurement data of current or power that varies according to the power supplied to the power load connected to the power supply system 1a without going through a network, and controlling the charging and discharging of the storage battery equipment. Therefore, the cases in which reception of power from the commercial power source 2 is permitted are not limited to the above cases. However, if reception of power from the commercial power source 2 is permitted in the above cases, the amount of power acquired from the commercial power source 2 to cover the power consumption of the power load 5 will be reduced, and the power supply system 1a can greatly contribute to reducing the environmental load. [Industrial Applicability]

[0081] The technology disclosed herein is applicable to power supply systems equipped with photovoltaic power generation equipment, fuel cell equipment, and storage battery equipment. The technology disclosed herein is applicable to environmental protection efforts such as RE100 (Renewable Energy 100%). [Explanation of symbols]

[0082] 1a, 1b Power supply system 2 Commercial power supply 3a Measuring instrument 5 Power load 10. Solar power generation facilities 20 Fuel cell equipment 30 Battery storage equipment 40 Communication Interface 50a control device (second control device) 50b control device (first control device) 60 Network

Claims

1. A method for operating an electric power supply system, comprising: receiving a control signal via a network to control power generation of the solar power generation facility and power generation of the fuel cell facility; Acquiring measurement data of a current or power in the power supply system, which varies depending on the power supplied to a power load connected to the power supply system, without going through the network, and controlling charging and discharging of the storage battery equipment based on the measurement data. How to drive.

2. The network is a network capable of communication by TCP / IP. The operating method according to claim 1.

3. The driving method according to claim 2 , wherein the network is a network capable of communicating via HTTP, HTTPS, or WEB-API.

4. The power supply system is connected to a commercial power source, The measurement data includes measurement data of a current or power output from the power supply system to the commercial power source. The operating method according to claim 1.

5. a control period for charging and discharging the storage battery equipment is shorter than a control period for power generation of the solar power generation equipment and a control period for power generation of the fuel cell equipment; The operating method according to claim 1.

6. transmitting said measurement data towards said network; The operating method according to claim 1.

7. The control signal is generated based on the measurement data acquired via the network. The operating method according to claim 6.

8. The frequency at which the measurement data is acquired without going through the network for controlling charging and discharging of the storage battery equipment is higher than the frequency at which the measurement data is transmitted to the network. The operating method according to claim 7.

9. 1. A power supply system comprising: Solar power generation equipment, A fuel cell facility; A battery storage facility; a measuring device for measuring a current or power in the power supply system that varies in response to a variation in power supplied to a power load connected to the power supply system; A first control device that controls charging and discharging of the storage battery equipment; A communication interface connected to a network, the communication interface receives, via the network, a control signal for controlling power generation by the solar power generation facility and power generation by the fuel cell facility; The first control device acquires measurement data indicating the measurement results of the measuring device without going through the network, and controls charging and discharging of the storage battery equipment based on the measurement data. Power supply system.

10. The network is a network capable of communication by TCP / IP. The power supply system according to claim 9.

11. The power supply system according to claim 10 , wherein the network is a network capable of communicating via HTTP, HTTPS, or WEB-API.

12. The power supply system is connected to a commercial power source, The measuring device measures a current or power output from the power supply system to the commercial power source. The power supply system according to claim 9.

13. the first control device controls charging and discharging of the storage battery equipment at a control period shorter than a control period of power generation of the solar power generation equipment and a control period of power generation of the fuel cell equipment; The power supply system according to claim 9.

14. The communication interface transmits the measurement data to a second control device connected to the network. The power supply system according to claim 9.

15. The second control device generates the control signal based on the measurement data acquired via the network.

15. The power supply system according to claim 14.

16. The frequency with which the first control device acquires the measurement data is higher than the frequency with which the second control device acquires the measurement data.

15. The power supply system according to claim 14.

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