Power management system, power management method, and program

Abstract

This power management system manages the power relating to an electric vehicle and a distributed power supply. The power management system is electrically connected to the electric vehicle, the distributed power supply, and a power system, and comprises: a first acquisition unit that acquires a generated power value of the distributed power supply; a second acquisition unit that acquires a power value purchased from the power system; a third acquisition unit that acquires a power value charged to the electric vehicle; and a calculation unit (32). A different CO2 discharge coefficient is set to each of the generated power value and the purchased power value. The calculation unit (32) adds a value, which is obtained by multiplying the charged power value by a first CO2 discharge coefficient corresponding to the purchased power, to a counter value of a CO2 discharge amount when the generated power value is zero, and retains the counter value when the purchased power value is zero, and calculates a CO2 discharge amount.

Description

Power management system, power management method and program

[0001] The present invention relates to a power management system, a power management method, and a program.

[0002] In recent years, the number of homes equipped with solar cells has been increasing. In such homes, the power generated by the solar cells is used to charge storage batteries of electric vehicles, etc. For example, Patent Document 1 discloses a power supply control device that charges a storage battery mounted on an automobile with power generated by solar cells.

[0003] JP 2010-268576 A

[0004] By the way, electricity generated by non-fossil energy such as solar cell power (i.e., CO ２ It may be difficult to charge the batteries of electric vehicles using only electricity generated by fossil fuels such as grid power (i.e., electricity generated by a method that does not emit CO2). ２ In such cases, the CO2 generated when generating the charging power that is charged into the battery of the electric vehicle may be used. ２ Controlling emissions is being considered.

[0005] However, it is difficult to control which power is being used to charge the storage battery of the electric vehicle (the source of the charging power), and it is difficult to control the CO generated when generating the charging power that is charged into the storage battery of the electric vehicle. ２ Emissions are difficult to control.

[0006] Therefore, the present invention aims to reduce the CO generated when generating charging power for charging the storage battery of an electric vehicle. ２ An electric power management system, an electric power management method, and a program are provided that can more appropriately manage emissions.

[0007] An energy management system according to one aspect of the present invention is an energy management system that manages the energy of an electric vehicle and a distributed power source, wherein the electric vehicle, the distributed power source, and a power grid are electrically connected, and the energy management system includes a first acquisition unit that acquires a generated energy value of the distributed power source, a second acquisition unit that acquires a purchased energy value from the power grid, a third acquisition unit that acquires a charged energy value for the electric vehicle, and a calculation unit, and calculates different CO ２ When the generated power value is zero, the calculation unit calculates a first CO 2 emission coefficient corresponding to purchased power as the charged power value. ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ Calculate emissions.

[0008] A power management method according to one aspect of the present invention is a power management method executed by a power management system that manages the power of an electric vehicle and a distributed power source, the method comprising: electrically connecting the electric vehicle, the distributed power source, and a power grid; acquiring a power generation value of the distributed power source; acquiring a power purchase value from the power grid; acquiring a power charge value for the electric vehicle; and calculating different CO ２ a first CO emission coefficient corresponding to purchased power is set in the charging power value when the generated power value is zero; ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ Calculate emissions.

[0009] A program according to one aspect of the present invention is a program for causing a computer to execute the above-described power management method.

[0010] According to one aspect of the present invention, CO generated when generating charging power to charge a storage battery of an electric vehicle is ２ It is possible to realize an electric power management system or the like that can more appropriately manage emissions.

[0011] FIG. 1 is a diagram illustrating a configuration of a power management system according to an embodiment. FIG. 2 is a block diagram illustrating a functional configuration of a management device according to an embodiment. FIG. 3 is a flowchart illustrating an operation of the power management system according to an embodiment. FIG. 4A is a first diagram illustrating a calculation process by a calculation unit according to an embodiment. FIG. 4B is a second diagram illustrating a calculation process by a calculation unit according to an embodiment. FIG. 4C is a third diagram illustrating a calculation process by a calculation unit according to an embodiment. FIG. 5 is a diagram illustrating a configuration of a power management system according to a modified example of an embodiment.

[0012] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0013] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, components, component placement and connection configurations, steps, and step order shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components not described in the independent claims are described as optional components.

[0014] Furthermore, each figure is a schematic diagram and is not necessarily an exact illustration. Therefore, for example, the scales of the figures do not necessarily match. Furthermore, in each figure, substantially the same components are given the same reference numerals, and redundant explanations are omitted or simplified.

[0015] Furthermore, in this specification, terms indicating relationships between elements such as "same," as well as numerical values ​​and numerical ranges, are not expressions that only express a strict meaning, but are expressions that also include a substantially equivalent range, for example, a difference of about several percent (or about 10%).

[0016] Furthermore, in this specification, ordinal numbers such as "first" and "second" do not refer to the number or order of components unless otherwise specified, but are used for the purpose of avoiding confusion and distinguishing between components of the same type.

[0017] (Embodiment) Hereinafter, a power management system according to the present embodiment will be described with reference to Figs. 1 to 4C.

[0018] [1. Configuration of the Power Management System] First, the configuration of the power management system according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing the configuration of the power management system according to this embodiment.

[0019] As shown in Fig. 1 , the power management system is a system that manages the power of an electric vehicle 44 ("EV" in Fig. 1 ) and a solar cell 41 ("PV" in Fig. 1 ), and includes a specific metering panel 10, the solar cell 41, a power conversion system 42 ("PCS" in Fig. 1 ), a vehicle charger 43, an electric vehicle 44 equipped with a storage battery, a power meter 45, a power grid 46, and a power load 47. The solar cell 41, the electric vehicle 44, the power grid 46, and the power load 47 are electrically connected to each other.

[0020] The specified meter panel 10 is connected to a power load 47 such as a home appliance (for example, a distribution board (not shown) connected to the power load 47), a power meter 45 connected between a power grid 46 and a house, a power conversion system 42, and a charger 43. In this embodiment, the specified meter panel 10 includes terminals 11-14, power sensors 21-24 which are specified meters, and a management device 30. The specified meter panel 10 is a box that houses the power sensors 21-24 and the management device 30.

[0021] The specified meter panel 10 is configured to be able to supply the power generated by the solar cell 41 to the electric vehicle 44, the power grid 46, and the power load 47. The specified meter panel 10 is also configured to be able to supply the power purchased from the power grid 46 to the electric vehicle 44 and the power load 47. The specified meter panel 10 is also configured to be able to supply the power discharged by the electric vehicle 44 to the power grid 46 and the power load 47. If the house is equipped with a power storage device, the specified meter panel 10 may be configured to be able to supply at least one of the power generated by the solar cell 41, the power purchased from the power grid 46, and the power discharged by the electric vehicle 44 to the power storage device.

[0022] The specific meter panel 10 is placed, for example, in a residence. A residence is an example of a facility. A facility may be a residential facility or a non-residential facility. Examples of residential facilities are a detached house and an apartment building. Each of the multiple dwelling units in an apartment building may be considered a "facility," or the entire apartment building may be considered a "facility." Examples of non-residential facilities include stores, office buildings, schools, welfare facilities, commercial complexes, hospitals, factories, etc.

[0023] The terminal 11 is a connection terminal for connecting the specific metering panel 10 (for example, the power sensor 21) and the power conversion system 42 via a power line or the like.

[0024] The terminal 12 is a connection terminal for connecting the specific meter panel 10 (e.g., the power sensor 22) and the charger 43 via a power line or the like.

[0025] The terminal 13 is a connection terminal for connecting the specific meter panel 10 (for example, the power sensor 23) and the power meter 45 via a power line or the like.

[0026] The terminal 14 is a connection terminal for connecting the specific metering panel 10 (for example, the power sensor 24) to a distribution panel to which the power load 47 is connected via a power line or the like.

[0027] The power sensor 21 is a sensor capable of measuring the power generated by the solar cell 41 and output by the power conversion system 42 (the AC power converted from the DC power generated by the solar cell 41 by the power conversion system 42). The power sensor 21 is connected between the terminal 11 and each of the power sensors 22 to 24. The power sensor 21 is an example of a first measuring instrument.

[0028] The power sensor 22 is a sensor that can measure the power (charging power to the electric vehicle 44) from at least one of the solar cell 41 and the power grid 46, and the discharge power from the electric vehicle 44. The power sensor 22 measures the power from the solar cell 41 and the power grid 46 without distinguishing between them. The power sensor 22 is connected between the terminal 12 and each of the power sensors 21, 23, and 24. The power sensor 22 is an example of a second measuring instrument.

[0029] The power sensor 23 is a sensor that can measure both the power purchased from the power grid 46 and the power sold to the power grid 46. The power sensor 23 is connected between the terminal 13 and each of the power sensors 21, 22, and 24. The power sensor 23 is an example of a third measuring instrument.

[0030] The power sensor 24 is a sensor capable of measuring the power supplied to the power load 47 from at least one of the solar cell 41, the electric vehicle 44, and the power grid 46. The power sensor 24 measures the power from the solar cell 41, the electric vehicle 44, and the power grid 46 without distinguishing between them. The power sensor 24 is connected between the terminal 14 and each of the power sensors 21 to 23. The power sensor 24 is an example of a fourth measuring instrument.

[0031] 1, power is supplied to the management device 30 via a power line common to the power load 47 within the specific metering panel 10. In other words, the power sensor 24 measures the total power supplied to the power load 47 and the power supplied to the management device 30. Note that the method of supplying power to the management device 30 is not limited to this.

[0032] The power values ​​measured by the power sensors 21 to 24 are output to the management device 30. That is, the management device 30 can acquire the power values ​​measured by the power sensors 21 to 24.

[0033] The number of power sensors built into the specific metering panel 10 is not limited to four, and may be three. For example, it is sufficient if three of the power sensors 21 to 24 are built into the specific metering panel 10. Using the power values ​​of the three power sensors and Kirchhoff's law, it is possible to calculate the power value of the omitted power sensor.

[0034] The management device 30 measures carbon dioxide (CO ２ ) is not emitted, but when charging from a grid power source, CO ２ Focusing on the fact that the electric vehicle 44 uses electricity generated by emitting CO ２electricity generated using fossil fuels (i.e., no CO ２ For example, management device 30 may perform control so that a mixture of electricity generated using non-fossil energy (generated electricity in this embodiment) and electricity generated using fossil energy (purchased electricity in this embodiment) is not supplied to electric vehicle 44.

[0035] In this specification, CO ２ The emissions are calculated based on the amount of CO generated (or presumed to have been generated) when generating the electricity used to charge the electric vehicle 44. ２ Emissions (CO indirectly emitted by the electric vehicle 44) ２ CO emissions) ２ If the electric vehicle 44 is a hybrid vehicle or the like, the CO emissions may be calculated by adding ２ It may include CO emissions, ２ It does not have to include emissions.

[0036] FIG. 2 is a block diagram showing the functional configuration of the management device 30 according to this embodiment.

[0037] 2 , the management device 30 includes, as its functional configuration, a communication unit 31, a calculation unit 32, and a control unit 33. The management device 30 also includes, as its hardware configuration, a non-volatile memory in which programs are stored, a volatile memory that is a temporary storage area for executing the programs, an input / output port, a communication interface, a processor that executes the programs, and the like. The memory is, for example, a read-only memory (ROM) or a random access memory (RAM), and can store programs that are executed by the processor. The communication unit 31, the calculation unit 32, and the control unit 33 are realized by, for example, a processor that executes programs stored in the memory.

[0038] The communication unit 31 is a communication device that enables the management device 30 to communicate with the power sensors 21 to 24 and the server. The communication unit 31 includes, for example, a communication circuit (communication module). The communication method of the communication unit 31 is not particularly limited, and may be wireless communication or wired communication.

[0039] The server receives the CO ２ It may also have a function for managing emissions.

[0040] The calculation unit 32 calculates the amount of CO indirectly emitted by the electric vehicle 44 based on the power values ​​of the power sensors 21 to 24. ２ The CO emissions are calculated by the calculation unit 32. ２ The method for calculating emissions will be described later.

[0041] The control unit 33 controls the charging of the electric vehicle 44 based on the power values ​​measured by the power sensors 21 to 24. The control unit 33 may, for example, control the charging conditions of the electric vehicle 44 so as to maintain a state in which power is sold to the power grid 46. The charging conditions include, for example, adjusting the value of the charging power. The control unit 33 also controls the charger 43 so that the electric vehicle 44 is not charged in a state in which the power generated by the solar cell 41 and the power purchased from the power grid 46 are mixed. The control unit 33 may, for example, control the charger 43 to charge the electric vehicle 44 when the power generation value is zero (e.g., the solar cell 41 is not generating power) or when the purchased power value is zero (e.g., no power is being purchased). The control unit 33 may, for example, control the charger 43 to charge the electric vehicle 44 when the purchased power value is zero but the generated power value is not zero. In other words, the control unit 33 may control the charger 43 to charge the electric vehicle 44 when the electric vehicle 44 can be charged using only one of the purchased power and the generated power.

[0042] The power management system is only required to include at least the management device 30. The management device 30 may be installed in a house or in an electric vehicle 44.

[0043] 1 , the solar cell 41 is an example of a distributed power source. The solar cell 41 is installed on the roof of a house and converts light energy into electrical energy (power) by utilizing the photovoltaic effect.

[0044] The power conversion system 42 is installed in the house and converts DC power generated by the solar cell 41 into AC power. The power conversion system 42 is also called a power conditioner.

[0045] The charger 43 is a charging facility that charges a storage battery mounted on the electric vehicle 44. Note that the power management system may include a charger / discharger (on-board charger) instead of the charger 43.

[0046] The electric vehicle 44 is a vehicle that is installed in a home (kept at the home) and runs using all or part of the electric energy stored in a storage battery as power, and may be, for example, an electric vehicle (EV), a plug-in hybrid vehicle (PHEV, PHV), a hybrid vehicle (HEV, HV), etc. The storage battery is also called a secondary battery or a battery.

[0047] The power meter 45 is a power sensor connected between the specific metering panel 10 and the power grid 46, and measures at least one of the value of forward power from the power grid 46 and the value of reverse power from the solar cell 41 to the power grid 46. The power meter 45 measures, for example, power supplied from one of the retail electricity supplier and the power receiving point to the other (that is, power supplied (purchased) from the power grid 46 to the house, and power sold from the house to the power grid 46). In this way, the power meter 45 functions as at least one of a power receiving power meter that measures power supplied from the power grid 46, and a power selling power meter that measures power sold reversely from the house to the retail electricity supplier at a predetermined unit price using the FIT system (Feed-In Tariff).

[0048] The power receiving point where the power meter 45 is installed may be a separation point of responsibility between the area belonging to the house and the area belonging to the power grid 46, or it may be a location where an inlet switchboard (low voltage) or a power receiving equipment (high voltage) is located.

[0049] The electricity retailer is a business that buys and sells electricity based on the measured values ​​of the power meter 45. The electricity retailer sells electricity to ordinary households, buildings, factories, etc. The measured values ​​of the power meter 45 are transmitted to the electricity retailer.

[0050] The power grid 46 is a grid operated by a retail electricity supplier or the like, and includes a grid power source.

[0051] The power load 47 is a load such as an electrical appliance that consumes power and is installed in the home. Examples of the power load 47 include loads of home appliances such as an air conditioner, a refrigerator, and a television, but the power load 47 may also include loads of electrical appliances other than home appliances. The power demand due to the power load 47 is also referred to as in-home power demand.

[0052] 2. Operation of the Power Management System Next, the operation of the power management system configured as described above will be described with reference to Fig. 3 to Fig. 4C. Fig. 3 is a flowchart showing the operation of the power management system (power management method) according to this embodiment.

[0053] 3 , the communication unit 31 acquires a power generation value of a distributed power source (S11). In this embodiment, the communication unit 31 acquires a PV power generation value of a solar cell 41, which is an example of a distributed power source, from the power sensor 21. The communication unit 31 functions as a first acquisition unit.

[0054] Next, the communication unit 31 acquires the value of power purchased and sold between the power grid 46 and the house from the power sensor 23 (S12). The communication unit 31 acquires the value of power purchased from the power grid 46 (purchased power value, purchased power amount) and the value of power sold to the power grid 46 (reverse power power value, power sold amount). Note that it is sufficient for the communication unit 31 to acquire at least the power purchased value in step S12. The communication unit 31 functions as a second acquisition unit.

[0055] Next, the communication unit 31 acquires the charge / discharge power value of the electric vehicle 44 from the power sensor 22 (S13). The communication unit 31 acquires the charge power value (charge amount) of charging the electric vehicle 44 and the discharge power value (EV discharge power value, discharge amount) of discharging from the electric vehicle 44. Note that it is sufficient for the communication unit 31 to acquire at least the charge power value in step S13. The communication unit 31 functions as a third acquisition unit.

[0056] Next, the communication unit 31 acquires the device power consumption value of the power load 47 from the power sensor 24 (S14). The communication unit 31 functions as a fourth acquisition unit.

[0057] For example, in steps S11 to S14, the communication unit 31 acquires each power value during a target period in which the electric vehicle 44 is being charged or discharged. Each acquired power value is an integrated value of the power measured during that period. The timing and order of acquiring each power value are not particularly limited.

[0058] Next, the calculation unit 32 determines whether or not the electric vehicle 44 is being charged and the generated power value is zero (S15).

[0059] When it is determined that the electric vehicle 44 is being charged and the generated power value is zero (Yes in S15), the calculation unit 32 calculates the first CO ２ The value multiplied by the emission coefficient is the CO ２ The discharge amount is added to the counter value (S16).

[0060] FIG. 4A is a first diagram for explaining the calculation process by the calculation unit 32 according to this embodiment.

[0061] In Fig. 4A, the solar cell 41 is not generating power, and therefore the generated power is not supplied to the electric vehicle 44. In this case, purchased power from the power grid 46 is used to charge the electric vehicle 44. The charging power value from the power sensor 22 ("M1" in Fig. 4A) is the power value based only on purchased power, and therefore, as described above, the first CO ２ The value multiplied by the emission coefficient is added to the counter value.

[0062] In this case, the power load 47 is supplied with purchased power from the power grid 46. ２ emissions (i.e., residential CO ２ The emission amount is calculated by adding the power consumption value of the device from the power sensor 24 to the first CO corresponding to the power grid 46. ２ The value multiplied by the emission coefficient is the CO ２ It may be calculated by adding to the counter value of the emission amount.

[0063] If the answer to step S15 is Yes (i.e., the generated power value is zero) and the purchased power value is not zero, the control unit 33 may control the charger 43 to charge the electric vehicle 44.

[0064] Referring again to FIG. 3 , if the calculation unit 32 determines that the electric vehicle 44 is being charged and the generated power value is not zero (No in S15), the calculation unit 32 determines whether the electric vehicle 44 is being charged and the purchased power value is zero (S17).

[0065] Next, when it is determined that the electric vehicle 44 is being charged and the purchased power value is zero (Yes in S17), the calculation unit 32 holds the counter value (S18).

[0066] 4B is a second diagram for explaining the calculation process by the calculation unit 32 according to the present embodiment. The solid line in FIG. 4B indicates that power is being supplied, and the dashed line indicates that power is not being supplied.

[0067] In Fig. 4B, since no power is purchased from the power grid 46, only the generated power is supplied to the electric vehicle 44 out of the generated power and purchased power. In other words, the power value measured by the power sensor 22 is the power value of the generated power. Since the charging power for the electric vehicle 44 is provided only by the generated power, the calculation unit 32 calculates the charging power value by adding a second CO ２ The value multiplied by the emission coefficient is added to the counter value. ２ Since the electricity is generated by a power generation method that does not emit CO ２ The emission coefficient is zero. That is, the second CO corresponding to the power generation value is added to the charging power value. ２The value multiplied by the emission coefficient is 0. Therefore, the calculation unit 32 holds the counter value as described above.

[0068] In this case, the power load 47 is supplied with the generated power from the solar cell 41. ２ emissions (i.e., residential CO ２ emissions) is the CO ２ Like emissions, they are retained.

[0069] In addition, if the answer to step S15 is No (i.e., the generated power value is not zero) and the purchased power value is not zero, the control unit 33 may control the charger 43 to charge the electric vehicle 44.

[0070] 3 , if the determination in step S17 is Yes, the electric power is being sold to the electric power grid 46, and therefore the control unit 33 next controls the charging power to maintain the power selling state (S19). The control unit 33 controls the charging power of the electric vehicle 44 to avoid a transition to a state in which the charging power is a mixture of generated power and purchased power. For example, when the reverse flow power value from the power sensor 23 decreases (approaches zero from positive), the control unit 33 performs control to reduce the charging power of the electric vehicle 44. Specifically, the control unit 33 controls the charger 43 to reduce the charging power when charging the electric vehicle 44. The charging power is an example of a charging condition.

[0071] Furthermore, if it is determined that the electric vehicle 44 is being charged and the purchased power value is not zero (No in S17), the calculation unit 32 does not charge the electric vehicle 44 and proceeds to step S20.

[0072] Next, the calculation unit 32 determines whether the electric vehicle 44 is discharging based on the discharge power value from the power sensor 22 (S20). The calculation unit 32 determines that the electric vehicle 44 is discharging when the discharge power value is greater than 0.

[0073] Next, when it is determined that the electric vehicle 44 is discharging (Yes in S20), the calculation unit 32 calculates the discharge power value from the power sensor 22 and the third CO ２ The value multiplied by the emission coefficient is the CO ２In other words, when the electric vehicle 44 is discharging, the calculation unit 32 performs a process of subtracting a value corresponding to the discharge power value from the counter value, a process of calculating the CO ２ A process to count down the amount of emissions is executed.

[0074] FIG. 4C is a third diagram for explaining the calculation process by the calculation unit 32 according to the present embodiment.

[0075] 4C, the discharge power from the electric vehicle 44 is supplied to the power load 47. In this case, the calculation unit 32 calculates the discharge power value from the power sensor 22 by adding a third CO ２ The value multiplied by the emission coefficient is the CO ２ Similarly, when the discharged power from the electric vehicle 44 is supplied to the power grid 46 (i.e., sold), the calculation unit 32 also adds the third CO ２ The value multiplied by the emission coefficient is the CO ２ The emission counter value is subtracted.

[0076] Referring again to FIG. 3, when the calculation unit 32 determines that the electric vehicle 44 is not discharging (No in S20), the process proceeds to step S22.

[0077] The processes in steps S11 to S21 are performed by the CO ２ This may be performed repeatedly over the period for which the emissions are to be calculated.

[0078] Next, the calculation unit 32 calculates the CO ２ The calculation unit 32 calculates the amount of CO emissions for the target period, for example. ２ It may also be calculated as emissions.

[0079] Next, the communication unit 31 receives the CO ２ The communication unit 31 outputs the amount of CO emissions to, for example, at least one of the user's information terminal and the server via communication. ２ The amount of emissions may be transmitted.

[0080] In the above description, the calculation unit 32 calculates the CO ２ Although an example of calculating CO emissions has been described, the present invention is not limited to this example. ２ For example, when the generated power value and the purchased power value are not zero, the calculation unit 32 may calculate a predetermined CO ２ The value multiplied by the emission coefficient is the CO ２ That is, the calculation unit 32 may add a predetermined CO 2 emission amount to the total power value obtained by adding the generated power value and the purchased power value. ２ The value multiplied by the emission coefficient is the CO ２ It may be added to the counter value of the emission amount. ２ The emission factor is the first CO ２ Emission factor and second CO ２ For example, the calculation may be based on a predetermined CO ２ The emission factor is the first CO ２ Emission factor and second CO ２ The emission coefficient may be an average value (for example, an arithmetic mean value).

[0081] (Variation of the Embodiment) The configuration of a power management system according to this variation will be described below with reference to FIG. 5 . The following description will focus on differences from the embodiment, and descriptions of content that is the same as or similar to the embodiment will be omitted or simplified. FIG. 5 is a diagram showing the configuration of a power management system according to this variation. In this variation, power sensors 21a to 23a are provided on devices connected to a specific metering panel 10a, and the management device 30 acquires power value measurement results from these devices. Furthermore, in this variation, the power management system has three power sensors. In the example of FIG. 5 , the power supplied to the power load 47 is calculated from the other three power values ​​using Kirchhoff's law. The power supplied to the power load 47 may be calculated by the calculation unit 32.

[0082] As shown in FIG. 5 , a PV power conditioner 42 a connected to terminal 11 is provided with a power sensor 21 a for measuring the power generation value of the solar cell 41, a V2H (Vehicle to Home) power conditioner 50 connected to terminal 12 is provided with a power sensor 22 a for measuring the charge / discharge power value of the electric vehicle 44, and a smart meter 45 a connected to terminal 13 is provided with a power sensor 23 a for measuring the forward power value from the power grid 46 (power purchase value) and the reverse power value to the power grid 46 (power sale value).

[0083] The PV power conditioner 42a is connected between the terminal 11 and the solar cell 41. The PV power conditioner 42a corresponds to, for example, the power conversion system 42 shown in FIG.

[0084] The V2H power conditioner 50 is connected between the terminal 12 and the electric vehicle 44 .

[0085] The smart meter 45a is connected between the terminal 13 and the power grid 46. The smart meter 45a corresponds to, for example, the power meter 45 shown in FIG.

[0086] Each of the power sensors 21a, 22a, and 23a is connected to the management device 30 so as to be able to communicate with the management device 30, and outputs the measured power values ​​to the management device 30 via communication.

[0087] In a power management system configured in this way, the same effects as those of the embodiment can be achieved.

[0088] (Effects, etc.) The invention derived from the disclosure of this specification and the effects, etc. obtained by the invention will be described below.

[0089] (Invention 1) An energy management system for managing the power of an electric vehicle and a distributed power source, wherein the electric vehicle, the distributed power source, and a power grid are electrically connected, and the energy management system includes a first acquisition unit that acquires a power generation value of the distributed power source, a second acquisition unit that acquires a power purchase value from the power grid, a third acquisition unit that acquires a power charge value for the electric vehicle, and a calculation unit, and calculates different CO ２When the generated power value is zero, the calculation unit calculates a first CO 2 emission coefficient corresponding to purchased power as the charged power value. ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ It is a power management system that calculates emissions.

[0090] As a result, when the generated power value is zero (for example, when all charging power is covered by purchased power), and when the purchased power value is zero (for example, when all charging power is covered by generated power), ２ In other words, when generated electricity and purchased electricity are not mixed, CO emissions are calculated. ２ Therefore, if the generated electricity and purchased electricity are not mixed, the CO ２ Since the CO emissions can be accurately calculated, the CO generated when generating the charging power that is charged into the storage battery of the electric vehicle can be ２ Emissions can be better managed.

[0091] (Invention 2) The third acquisition unit further acquires a discharge power value from the electric vehicle, and the calculation unit further calculates a third CO corresponding to the discharge power value. ２ The value multiplied by the emission coefficient is subtracted from the counter value to obtain the CO ２ The power management system of the first aspect calculates emissions.

[0092] This allows the CO2 to be calculated by taking into account the discharged power when the electric vehicle discharges. ２ Therefore, CO emissions can be calculated. ２ In view of the increasing number of types of electricity for which emissions are calculated, ２ Emissions can be better managed.

[0093] (Invention 3) The power management system according to Invention 1 or 2 further includes a control unit that controls a charging condition of the electric vehicle so as to maintain a state in which the electric vehicle sells power to the power grid.

[0094] This allows the electric vehicle to be charged only with the generated power by maintaining the power selling state. In other words, it is possible to prevent the generated power from being mixed with the purchased power. Therefore, it is possible to obtain a more accurate CO ２ CO emissions can be calculated ２ Emissions can be better managed.

[0095] (Invention 4) The power management system according to any one of Inventions 1 to 3 further comprises a control unit that controls the electric vehicle so as to charge the electric vehicle when the generated power value is zero.

[0096] This allows the electric vehicle to be charged only with purchased power, which means that the mixing of generated power and purchased power can be suppressed. Therefore, more accurate CO ２ CO emissions can be calculated ２ Emissions can be better managed.

[0097] (Invention 5) The power management system according to any one of Inventions 1 to 4 further comprises a control unit that controls the electric vehicle to be charged when the purchased power value is zero.

[0098] This allows the electric vehicle to be charged only with the generated power, which means that the mixing of generated power and purchased power can be suppressed. Therefore, more accurate CO ２ CO emissions can be calculated ２ Emissions can be better managed.

[0099] (Invention 6) When the generated power value and the purchased power value are not zero, a predetermined CO ２ The value multiplied by the emission coefficient is ２ The power management system according to any one of the first to fifth aspects of the present invention adds to the counter value of the amount of emitted energy.

[0100] This ensures that when generated power and purchased power are mixed, all of the charging power is CO ２It is assumed that the electricity is generated by a power generation method that emits CO ２ Therefore, CO emissions can be calculated. ２ This prevents emissions from being calculated lower than they actually are, ２ Emissions can be better managed.

[0101] (Invention 7) The predetermined CO ２ The emission coefficient is the first CO ２ Emission factor and second CO corresponding to generated power ２ This is the power management system of Invention 6, which is an average value of the emission coefficient.

[0102] This allows for a more suitable CO2 reduction when generated and purchased electricity is mixed. ２ Emission factors can be used, so CO ２ Emissions can be calculated more accurately.

[0103] (Invention 8) A power management method executed by a power management system that manages the power of an electric vehicle and a distributed power source, wherein the electric vehicle, the distributed power source, and a power grid are electrically connected, a generated power value of the distributed power source is acquired, a purchased power value from the power grid is acquired, a charging power value for the electric vehicle is acquired, and different CO ２ a first CO emission coefficient corresponding to purchased power is set in the charging power value when the generated power value is zero; ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ This is an electricity management method that calculates emissions.

[0104] This provides the same effects as the above-mentioned power management system.

[0105] (Invention 9) A program for causing a computer to execute the power management method of invention 8.

[0106] This provides the same effects as the above-mentioned power management system.

[0107] These general or specific aspects may be realized as a system, a method, an integrated circuit, a computer program, or a non-transitory recording medium such as a computer-readable CD-ROM, or as any combination of the system, method, integrated circuit, computer program, or recording medium. The program may be pre-stored in the recording medium, or may be supplied to the recording medium via a wide area communication network including the Internet.

[0108] (Other Embodiments) While the power management system according to one or more aspects has been described above based on the embodiments and modifications, the present invention is not limited to these embodiments and modifications. As long as they do not deviate from the spirit of the present invention, various modifications that a person skilled in the art can conceive of to the present embodiment and modifications constructed by combining components of different embodiments may also be included in the present invention.

[0109] For example, in the above-described embodiment and modified example, the management device 30 is built into the specific weighing panel 10, 10a, but this is not limiting. Some or all of the functions of the management device 30 may be possessed by the electric vehicle 44, or may be possessed by an information processing device (e.g., a server) capable of communicating with the specific weighing panel 10, 10a.

[0110] Furthermore, the specific metering panel 10, 10a in the above-described embodiment and modified example may be a stand-alone device or may be built into a distribution board or the like.

[0111] Furthermore, in the above-described embodiment and modified examples, when the electric vehicle 44 is a vehicle that also consumes gasoline to run, such as a plug-in hybrid vehicle or a hybrid vehicle, the calculation unit 32 calculates the CO ２ Calculate the CO emissions of the electric vehicle 44 ２ CO2 from gasoline may be added to the total emissions. ２ Any known method may be used to calculate the amount of emissions. For example, the amount of gasoline consumed obtained from a fuel consumption sensor of the vehicle and the amount of CO corresponding to the gasoline may be calculated. ２ Emission factor (e.g., 2.32 g-CO ２ / L). ２ Emissions are residential CO ２ It is not added to emissions.

[0112] In addition, each CO in the above embodiment and modified example ２ The emission coefficient may be a fixed value or may be a value that changes every predetermined period (for example, every 30 minutes). ２ The emission coefficient may be a value set by a public institution, for example. ２ The emission coefficient may be acquired in advance and stored in a storage unit (not shown) of the management device 30. In addition, the calculation unit 32 may calculate, for example, each CO ２ Charging control may be performed so that the electric vehicle 44 is charged based on at least one of the power generation method and timing that reduces the emission coefficient.

[0113] In the above embodiments, each component may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0114] The order in which the steps in the flowchart are executed is merely an example for specifically explaining the present invention, and other orders may be used. Some of the steps may be executed simultaneously (in parallel) with other steps, or some of the steps may not be executed.

[0115] The division of functional blocks in the block diagram is an example, and multiple functional blocks may be realized as a single functional block, one functional block may be divided into multiple blocks, or some functions may be moved to another functional block.Furthermore, the functions of multiple functional blocks having similar functions may be processed in parallel or in time-sharing by a single piece of hardware or software.

[0116] Furthermore, the management device 30 according to the above embodiment may be realized as a single device or may be realized by multiple devices. When the management device 30 is realized by multiple devices, the components of the management device 30 may be distributed in any manner among the multiple devices. When the management device 30 is realized by multiple devices, the communication method between the multiple devices is not particularly limited, and may be wireless communication or wired communication. Furthermore, wireless communication and wired communication may be combined between the devices.

[0117] Furthermore, each component described in the above embodiments may be implemented as software or, typically, as an LSI, which is an integrated circuit. These components may be individually integrated into a single chip, or some or all of them may be integrated into a single chip. Here, the term "LSI" is used, but depending on the level of integration, it may also be referred to as an IC, system LSI, super LSI, or ultra LSI. Furthermore, the integrated circuit implementation method is not limited to LSI, and may be implemented using a dedicated circuit (a general-purpose circuit that executes a dedicated program) or a general-purpose processor. After LSI fabrication, a field programmable gate array (FPGA) that can be programmed or a reconfigurable processor that can reconfigure the connections or settings of circuit cells within the LSI may also be used. Furthermore, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology or a derivative technology, that technology may naturally be used to integrate the components.

[0118] A system LSI is an ultra-multifunctional LSI manufactured by integrating multiple processing units on a single chip, and is specifically a computer system comprising a microprocessor, ROM, RAM, etc. The ROM stores computer programs. The system LSI achieves its functions when the microprocessor operates in accordance with the computer programs.

[0119] Another aspect of the present invention may be a computer program that causes a computer to execute each of the characteristic steps included in the power management method shown in FIG.

[0120] Furthermore, for example, the program may be a program to be executed by a computer. Another aspect of the present invention may be a computer-readable non-transitory recording medium on which such a program is recorded. For example, such a program may be recorded on a recording medium and distributed or circulated. For example, the distributed program may be installed in a device having another processor, and the program may be executed by the processor, thereby causing the device to perform each of the above processes.

[0121] 31 Communication unit (first acquisition unit, second acquisition unit, third acquisition unit, fourth acquisition unit, output unit) 32 Calculation unit 33 Control unit 41 Solar cell 44 Electric vehicle 46 Power system

Claims

1. An energy management system that manages the power of an electric vehicle and a distributed power source, wherein the electric vehicle, the distributed power source, and a power grid are electrically connected, and the energy management system includes a first acquisition unit that acquires a generated power value of the distributed power source, a second acquisition unit that acquires a purchased power value from the power grid, a third acquisition unit that acquires a charging power value for the electric vehicle, and a calculation unit, and calculates different CO2 values ​​for the generated power value and the purchased power value. ２ an emission coefficient is set, and when the generated power value is zero, the calculation unit calculates a first CO 2 emission coefficient corresponding to purchased power as the charged power value; ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ An electricity management system that calculates emissions.

2. The third acquisition unit further acquires a discharge power value from the electric vehicle, and the calculation unit further calculates a third CO corresponding to the discharge power value. ２ The value multiplied by the emission coefficient is subtracted from the counter value to obtain the CO ２ The power management system according to claim 1 , wherein an emission amount is calculated.

3. The power management system according to claim 1 or 2, further comprising a control unit that controls the charging conditions of the electric vehicle so as to maintain a state in which the electric vehicle sells power to the power grid.

4. The power management system according to claim 1 or 2, further comprising a control unit that controls the electric vehicle to be charged when the generated power value is zero.

5. The power management system according to claim 1 or 2, further comprising a control unit that controls the electric vehicle to be charged when the purchased power value is zero.

6. If the generated power value and the purchased power value are not zero, a predetermined CO ２ The value multiplied by the emission coefficient is ２ The power management system according to claim 1 or 2, wherein the counter value of the emission amount is incremented.

7. The specified CO ２ The emission coefficient is the first CO ２ Emission factor and second CO corresponding to generated power ２ The power management system according to claim 6 , wherein the average value is an average of the emission coefficients.

8. A power management method executed by a power management system that manages the power of an electric vehicle and a distributed power source, wherein the electric vehicle, the distributed power source, and a power grid are electrically connected, a generated power value of the distributed power source is acquired, a purchased power value from the power grid is acquired, a charging power value for the electric vehicle is acquired, and different CO2 values ​​are calculated for the generated power value and the purchased power value. ２ a first CO emission coefficient corresponding to purchased power is set to the charging power value when the generated power value is zero; ２ The value multiplied by the emission factor is CO ２ When the purchased electricity value is zero, the counter value is maintained. ２ Calculating emissions. Power management methods.

9. A program for causing a computer to execute the power management method according to claim 8.

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