JP6631870B2 - Power management system, power management device, power management method, and program - Google Patents

Description

  The present invention relates to a power management system, a power management device, a power management method, and a program.

  2. Description of the Related Art In recent years, the spread of demand response (DR: Demand Response) for stabilizing a power system by controlling electric appliances of a customer during a time period when power supply and demand is tight has been studied. For example, Patent Literature 1 discloses a power management device that controls an electric device according to a remaining charge amount of a storage battery when receiving a power reduction request from a server of an aggregator that is a provider of a supply and demand adjustment business. Have been.

JP 2012-205430 A

  By the way, there is known a DR of a method of unilaterally requesting a customer to reduce a predetermined amount of power in accordance with past performance or the like. However, in such a DR, the amount of power requested to be reduced and the actual amount of power reduction are known. The problem is that there is a case where the amount of power that has been reduced significantly differs greatly. That is, the problem is that it is difficult to execute DR stably.

  The present invention provides a power management system, a power management device, a power management method, and a program that can realize stable DR.

  The power management system according to one aspect of the present invention is an acquisition unit that acquires power consumption in a facility, and a power consumption minimum required for the facility based on the power consumption acquired by the acquisition unit. A first determination unit that determines one power, a second determination unit that determines a second power that is a normal power consumption in the facility based on the power consumption acquired by the acquisition unit, and the second power A calculating unit configured to calculate a reducible amount of power consumption in the facility based on a difference from the first power; and an output unit outputting the calculated reducible amount.

The power management device according to one embodiment of the present invention includes an acquisition unit that acquires the power consumption in the facilities, based on the power consumption acquired by the acquisition unit is the power consumption is the minimum required to the facility A first determining unit that determines a first power, a second determining unit that determines a second power that is a normal power consumption in the facility, based on the power consumption acquired by the acquiring unit, A calculating unit configured to calculate a reducible amount of power consumption in the facility based on a difference between the power consumption and the first power; and an output unit outputting the calculated reducible amount.

  The power management method according to one aspect of the present invention obtains power consumption in a facility, and based on the obtained power consumption, determines a first power that is a minimum required power consumption in the facility, and obtains the first power. Based on the power consumption is determined, the second power that is the normal power consumption in the facility, based on the difference between the second power and the first power, the amount of power that can be reduced in the facility, Calculate and output the calculated reducible amount.

  A program according to one embodiment of the present invention is a program for causing a computer to execute the above power management method.

  The power management system, the power management device, the power management method, and the program according to one embodiment of the present invention can realize stable DR.

FIG. 1 is a block diagram showing a configuration of the power management system according to the first embodiment. FIG. 2 is a block diagram showing a system configuration of the controller. FIG. 3 is a diagram illustrating a correspondence relationship between the branch circuits stored in the storage unit and the electric devices connected to the branch circuits. FIG. 4 is a diagram illustrating an example of a method for determining the first power and the second power. FIG. 5 is a flowchart of the basic operation of the controller. FIG. 6 is a flowchart of the operation example 1. FIG. 7 is a diagram illustrating an example of a display screen used to specify a target branch circuit. FIG. 8 is a flowchart of the operation example 2. FIG. 9 is a diagram illustrating an example of a display screen on which an enter button for instructing first power is displayed. FIG. 10 is a flowchart of the operation example 3. FIG. 11 is a flowchart of the operation example 4. FIG. 12 is a block diagram illustrating a configuration of a power management system according to the second embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and do not limit the present invention. Further, among the components in the following embodiments, components not described in the independent claims indicating the highest concept are described as arbitrary components.

  Each drawing is a schematic diagram, and is not necessarily strictly illustrated. In addition, in each of the drawings, substantially the same configuration is denoted by the same reference numeral, and redundant description may be omitted or simplified.

(Embodiment 1)
[Overall configuration of power management system]
First, the overall configuration of the power management system according to the first embodiment will be described. FIG. 1 is a block diagram showing a configuration of the power management system according to the first embodiment.

  As illustrated in FIG. 1, the power management system 10 includes a power measurement device 20, a controller 30, a host server 50, a DR server 60, a power generation device 70, a power storage device 75, and an information communication terminal 90. Prepare. The power measurement device 20, the controller 30, the power generation device 70, and the power storage device 75 are installed in the facility 40. The facility 40 is, in other words, a customer. FIG. 1 also shows a power system 80.

  The power management system 10 is provided in a facility 40 such as a house, and is a system for managing power consumption (power consumption) of the plurality of electric devices 23 in the facility 40, controlling the electric devices 23, performing DR control, and the like. is there. The electric device 23 is, for example, a lighting device, a refrigerator, a washing machine, or an IH cooking heater. Each of the plurality of electric devices 23 has a wireless communication function and can perform wireless communication with the controller 30. The facility 40 is, for example, a detached house, but may be an apartment house, a factory, an office building, a commercial facility, or the like.

  In the DR control in the power management system 10, when the controller 30 receives the power reduction request from the DR server 60, the controller 30 calculates the amount of power reduction in a period in which the DR is performed (hereinafter, also referred to as a DR period) and calculates the DR. Send it to server 60. Then, the DR server 60 transmits to the controller 30 a DR signal in which the power reduction within the range of the reducible amount is specified, and the controller 30 responds to the received DR signal to reduce the power consumption of the specified reduction amount. Control such as stopping the electric device 23 in order to reduce power consumption.

  As described above, in the power management system 10, the possible reduction amount is transmitted from the controller 30 to the DR server 60 before the DR period. For this reason, the DR server 60 can estimate in advance the possible power reduction amount during the DR period. Therefore, it is possible to suppress a large difference between the power amount requested to be reduced in the DR period and the actually reduced power amount. That is, stable DR can be realized.

  Hereinafter, each device constituting the power management system 10 will be described in detail. Note that in this specification, the power reduction request is a prior notification that is issued before the DR period, and in the DR period, the control of the electric device 23 is performed based on the DR signal.

[Host server and DR server]
The upper server 50 is a server that transmits and receives data to and from the DR server 60. The host server 50 is managed by a company that manages the power system 80 such as a power company.

  The DR server 60 is a server that transmits and receives data to and from the controller 30. Specifically, the DR server 60 transmits a power reduction request and a DR signal to the controller 30. Also, the power reduction amount is received from the controller 30. The DR server 60 is managed by an aggregator. The aggregator is, for example, a company that performs a power supply and demand adjustment business in response to a request from a company such as a power company that manages the power system 80 (a company that substantially owns the upper server 50).

  The upper server 50 and the DR server 60 may be one server. For example, the host server 50 may have the function of the DR server 60.

[Power measurement device]
The power measuring device 20 is a distribution board having a power measuring function and a wireless communication function. The power measuring device 20 has a main breaker 21 for turning on or off power supply from the power system 80 through the main line 11. The main breaker 21 is a breaker that stops supplying power from the power system 80 when a current exceeding a predetermined current (a current based on power determined by a contract with a power company) flows from the power system 80.

  In addition, the power measuring device 20 has a plurality of branch breakers 22 corresponding to each of the plurality of branch circuits 12 branched from the main line 11. That is, the power measuring device 20 includes the branch breaker 22 for each branch circuit 12. The branch breaker 22 is a breaker that stops supplying power to the branch circuit 12 when an overcurrent flows in the branch circuit 12 connected to the branch breaker 22. It is assumed that the plurality of branch circuits 12 (the plurality of branch breakers 22) are given numbers in advance.

  In addition, the power measuring device 20 includes a measuring unit 25. The measurement unit 25 includes a CT (Current Transformer) provided for each branch circuit 12, and measures power consumption (current) for each branch circuit 12 branched from the main line 11 by CT. For example, when one electric device 23 is connected to the branch circuit 12, the measuring unit 25 can measure the power consumption of the electric device 23. More specifically, the electric device 23 is connected to the branch circuit 12 via an outlet.

  The measurement unit 25 is specifically realized by the CT and a processor, a microcomputer, a dedicated circuit, or the like. Note that the measurement unit 25 may measure the power consumption of the trunk line 11 (main trunk circuit). Note that the measurement unit 25 is not limited to the configuration including the CT, and may include, for example, a Rogowski circuit or a GMR element.

  Although not shown, the power measuring device 20 includes a communication module (communication circuit) for performing wireless communication with the controller 30, and is capable of wireless communication with the controller 30. Specifically, the power measuring device 20 transmits the power consumption of each branch circuit 12 to the controller 30 by wireless communication. The wireless communication method (communication standard) is, for example, specific low-power wireless using a 920 MHz band frequency, such as Zigbee (registered trademark), Bluetooth (registered trademark), or a wireless LAN (Local Area Network). And other communication standards. Further, the power measuring device 20 may perform wired communication with the controller 30.

  Note that the specific mode of the power measuring device 20 is not particularly limited as long as the power consumption of each branch circuit 12 can be measured. For example, the power measurement device 20 may be realized as a device (measurement unit) different from the distribution board. Specifically, the power measuring device 20 may be an outlet plug type device connected between the outlet and the electric device 23. In this case, the power measuring device 20 can measure the power consumption of each outlet.

[controller]
Next, the controller 30 will be described with reference to FIG. 2 in addition to FIG. FIG. 2 is a block diagram showing a system configuration of the controller 30.

  The controller 30 is an example of a power management device, and is a control device that accumulates and manages the power consumption measured by the measurement unit 25. The controller 30 is specifically a HEMS (Home Energy Management System) controller, but may be a BEMS (Building Energy Management System) or a FEMS (Factory Energy Management) which may be a controller.

  As shown in FIG. 2, the controller 30 specifically includes a first communication unit 31, a control unit 32, a storage unit 37, and a second communication unit 36. The control unit 32 includes a first determining unit 33, a second determining unit 34, and a calculating unit 35.

  The first communication unit 31 is a communication module (communication circuit) for the controller 30 to perform wireless communication with the power measurement device 20 and the plurality of electric devices 23. The first communication unit 31 transmits a control signal to each of the plurality of electric devices 23 based on the control of the control unit 32. During the DR period, the power consumption of the plurality of electric devices 23 is reduced by the control signal.

  The first communication unit 31 also functions as an acquisition unit. The first communication unit 31 sequentially obtains the power consumption of the facility 40 measured by the measurement unit 25. Specifically, the first communication unit 31 acquires the power consumption in the facility 40 for each of the branch circuits 12 included in the facility 40. Wireless communication is used to acquire power consumption. The first communication unit 31 may acquire the power consumption of the facility 40 measured by the measurement unit 25 in real time, or may acquire the power consumption at regular intervals (for example, every hour).

  The storage unit 37 is a storage device that stores (accumulates) the power consumption of the plurality of branch circuits 12 obtained by the first communication unit 31. The power consumption of the plurality of branch circuits 12 is stored in association with time information (including the date) when the power consumption was measured. The storage unit 37 is specifically realized by a semiconductor memory or the like.

  The storage unit 37 also stores the correspondence between the branch circuit 12 (the number of the branch circuit 12) and the electric device 23 connected to the branch circuit 12. FIG. 3 is a diagram showing a correspondence relationship between the branch circuits 12 (numbers of the branch circuits 12) stored in the storage unit 37 and the electric devices 23 (names of the branch circuits 12) connected to the branch circuits 12. is there. Such correspondence is registered (set) by the user when the power management system 10 is introduced, for example.

  Note that the “target / non-target setting” included in the correspondence relationship of FIG. 3 indicates that the branch circuit 12 calculates the first power in the calculation of the minimum required power (first power) in the facility 40, which will be described later. This item indicates whether or not the target branch circuit 12 is a target branch circuit (hereinafter, also referred to as a target branch circuit). Such target or non-target setting is performed by the user through the information communication terminal 90.

  The storage unit 37 stores presence / absence information indicating whether or not a person is absent in the facility 40. The presence / absence information is changed by the user through the information communication terminal 90. It should be noted that the presence / absence information may be set as a schedule (timer setting) through the information communication terminal 90, such as automatically setting “absence” for a predetermined period of a day.

  Here, the power consumption of each branch circuit 12 stored in the storage unit 37 by the control unit 32 is the power consumption when a person is present at the facility 40 or when the person is not present at the facility 40. Is stored so that the power consumption can be determined.

  The storage unit 37 also stores a control program executed by the control unit 32 and the like.

  The control unit 32 is realized by a processor, a microcomputer, or a dedicated circuit, and performs information processing such as storage of power consumption in the storage unit 37 and management of the stored power consumption. In the DR control, the control unit 32 transmits a control signal to the plurality of electric devices 23 using the first communication unit 31, and for example, stops a part of the plurality of electric devices 23 to reduce consumption in the facility 40. Reduce power.

  Further, when the second communication unit 36 receives the power reduction request from the DR server 60, the control unit 32 calculates the reducible amount and outputs the calculated reducible amount to the DR server 60. Hereinafter, each component of the control unit 32 will be described in detail.

  The first determination unit 33 determines the first power that is the minimum power consumption of the facility 40 based on the power consumption acquired by the first communication unit 31. In other words, the first power is the power consumption estimated as the minimum required by the user or the controller 30. For example, the first determination unit 33 performs a user's intentional operation, such as standby power that the TV constantly consumes for receiving infrared rays from the remote controller, and power that the refrigerator constantly consumes. Irrelevant power consumption is determined as the first power. In addition, the first determination unit 33 may determine the first power based on an instruction or designation of the user, and the first power in this case is the power consumption determined to be the minimum required by the user.

  The second determination unit 34 determines the second power that is the normal power consumption in the facility 40 based on the power consumption acquired by the first communication unit 31. The second determination unit 34 determines, for example, so-called baseline power as the second power. The baseline power is normal power consumption assumed when the facility 40 does not reduce power consumption based on DR. The second power includes power consumption of the electric device 23 according to a user's intentional operation.

  In the first embodiment, the first determination unit 33 determines the first power based on the power consumption acquired by the first communication unit 31 when no person is present at the facility 40. On the other hand, the second determination unit 34 determines the second power based on the power consumption acquired by the first communication unit 31 when a person is present at the facility 40. That is, the control unit 32 determines whether or not the power consumption stored in the storage unit 37 is the power consumption when a person is present, and uses the power consumption to determine the first power based on the determination result. It is determined whether or not to use the second power. FIG. 4 is a diagram illustrating an example of a method for determining the first power and the second power.

  For example, as shown in FIG. 4B, in the period from 7:00 to 18:00 on February 10, 2015, the presence / absence information may indicate that no person is present at the facility 40. . In this case, the first determination unit 33 is the average value (average power consumption) of the power consumption (here, the total power consumption of the branch circuits 12; the same applies hereinafter) stored in the storage unit 37 for the period. 430 W is determined as the first power.

  Also, as shown in FIG. 4A, the presence / absence information indicates that a person is present at the facility 40 during the period from 18:00 on February 9, 2015 to before 7:00 (on the next day). There are cases. In this case, the second determination unit 34 determines 1500 W that is the average value (average power consumption) of the power consumption for the period stored in the storage unit 37 as the second power.

  Similarly, as shown in FIG. 4 (c), the presence / absence information indicates that a person is present at the facility 40 during the period from 18:00 to 7:00 (the next day) on February 10, 2015. May be shown. In this case, the second determination unit 34 determines 1650 W that is the average value (average power consumption) of the power consumption for the period stored in the storage unit 37 as the second power.

  The method for determining the first power and the second power illustrated in FIG. 4 is an example. In FIG. 4, the average value of the power consumption in the target period is used as the first power and the second power. For example, the most frequent power consumption in the target period based on the histogram is the first power and the second power. It may be used as two electric powers.

  The determination of the first power and the determination of the second power are performed, for example, when the second communication unit 36 receives the power reduction request from the DR server 60, but is performed before receiving the power reduction request. May be.

  For example, the determination of the first power and the second power may be calculated based on the power consumption data for the latest 24 hours at 0:00 every day, and may be stored in the storage unit 37. In this case, when the second communication unit 36 receives the power reduction request from the DR server 60, the control unit 32 determines the first power and the second power from the history of the first power and the second power stored in the storage unit 37. The selection of the second power may be performed. In this selection, one whose condition is close to the DR period is selected. The conditions here include various conditions such as season, time zone, day of the week, whether the day is a holiday or a weekday.

  Further, it is desirable that the second power be determined based on the power consumption in the facility 40 immediately before the DR period. For example, when the power reduction request from the DR server 60 is made immediately before the DR period, the second determination unit 34 determines that the second communication unit 36 is out of the power consumption acquired by the first communication unit 31. The power consumption when the reduction request is received may be determined as the second power. In other words, the power consumption measured at the time closest to the time when the first communication unit 31 receives the power reduction request (for example, the time immediately after the first communication unit 31 receives the power reduction request) is defined as the second power. It is good to decide.

  Further, when the power reduction request from the DR server 60 is made slightly before (for example, one day before) the DR period, the second determination unit 34 estimates the power consumption in the DR period and, for example, The average value of the power consumption acquired by the first communication unit 31 is determined as the second power. At this time, a period under conditions as close as possible to the DR period may be used as the predetermined period in consideration of the season, time zone, day of the week, and whether the DR period is a holiday or a weekday.

  Next, the calculation unit 35 will be described. The calculation unit 35 calculates a possible reduction amount based on the determined second power and the determined first power. The reducible amount is represented by, for example, reducible power [W], and the reducible power is obtained by the following equation.

      (Reducible power) = (second power)-(first power)

  Thus, when the second power is larger than the first power, the calculation unit 35 sets the difference between the second power and the first power as the reducible power. On the other hand, when the second power is equal to or less than the first power, it is highly likely that at least one of the determined second power and the determined first power is abnormal. Therefore, for example, when the second power is equal to or less than the first power, the calculation unit 35 instructs the first determination unit 33 and the second determination unit 34 to redetermine the second power and review the first power.

  The calculating unit 35 may use the reducible power as it is, or may calculate the reducible power amount [Wh] in a part or all of the DR period based on the reducible power and calculate the calculated reducible power. The amount of power may be reduced. That is, the calculating unit 35 may calculate the reducible power amount according to the reducible power as the reducible amount.

  Note that the reducible power amount may be calculated for each predetermined period included in the DR period. That is, the calculation unit 35 may calculate the reducible power amount according to the reducible power as the reducible amount every predetermined period.

  The second communication unit 36 communicates with the DR server 60 and the information communication terminal 90. For example, the second communication unit 36 receives a power reduction request and a DR signal from the DR server 60. As described above, the power reduction request is transmitted from the DR server 60 before the DR period. The DR signal is a signal that specifies the amount of power reduction within the range of the reducible amount, and is transmitted from the DR server 60 during the DR period.

  The second communication unit 36 also functions as an output unit, and outputs (transmits) the reducible amount calculated by the calculation unit 35 to the DR server 60 based on the control of the control unit 32. Note that the DR signal may be a signal specifying the maximum power consumption to be followed by the user of the facility 40 during the DR period. In this case, the DR server 60 calculates the maximum power consumption based on the reducible amount.

  In addition, the second communication unit 36 receives (accepts) a user instruction or designation from the information communication terminal 90. Specifically, the second communication unit 36 functions as a designation receiving unit, and designates at least a part of the plurality of branch circuits 12 as a target branch circuit used for determining the first power by the user. Through the information communication terminal 90. In addition, the second communication unit 36 receives an instruction to change presence / absence information from the user through the information communication terminal 90.

  The second communication unit 36 is, specifically, a communication module (communication circuit) that performs communication using the Internet and a LAN. In the first embodiment, the second communication unit 36 performs communication using a wireless LAN, but may be a communication module using another wireless communication method. When the communication method of the first communication unit 31 and the communication method of the second communication unit 36 are the same, the first communication unit 31 and the second communication unit 36 may be realized as one communication module. Good. When the second communication unit 36 performs communication using a wireless LAN, a wireless LAN router (not shown) is interposed between the second communication unit 36 and the information communication terminal 90.

[Information communication terminal]
The information communication terminal 90 is a user interface for transmitting an instruction or designation to the controller 30. The information communication terminal 90 is specifically a personal computer, for example, but may be a mobile terminal such as a smartphone, a tablet terminal, or a remote controller dedicated to the controller 30.

  Specifically, the information communication terminal 90 has a communication module (communication circuit) that performs communication using a wireless LAN, and can communicate with the second communication unit 36. In addition, the information communication terminal 90 has an input receiving unit that receives a user's input.

  The input receiving unit is, specifically, a keyboard and a mouse when the information communication terminal 90 is a personal computer, but a GUI including a touch panel when the information communication terminal 90 is a smartphone or a tablet terminal. (Graphical User Interface). In the first embodiment, the information communication terminal 90 has a display unit that displays an image.

  The information communication terminal 90 is unnecessary when the controller 30 itself has a user interface.

[Power generation device and power storage device]
The power generation device 70 is a device that generates power and is installed in the facility 40. The power generation device 70 is, specifically, a solar power generation system, a fuel cell system, or the like.

  The power storage device 75 is a device having a function of charging and discharging power, and is installed in the facility 40. The power storage device 75 is, specifically, a power storage device using a secondary battery (storage battery) such as a lead storage battery, a nickel-metal hydride battery, a lithium ion battery, or a redox flow battery. An EV (Electric Vehicle) equipped with a lead battery, a nickel-metal hydride battery, a lithium ion battery, or the like may be used as the power storage device 75.

  The power storage device 75 is in an economic priority mode in which charging and discharging are performed so that the power rate at the facility 40 is reduced based on the power rate information, and the power consumption of the power stored in the power storage device 75 (self-consumption). ), And has a mode such as an environment priority mode in which power is not sold.

[basic action]
Next, the basic operation of the controller 30 will be described. FIG. 5 is a flowchart of the basic operation of the controller 30.

  The first communication unit 31 of the controller 30 acquires the power consumption of the facility 40 (S11). The first communication unit 31 only needs to acquire at least the power consumption of the entire facility 40 (the power consumption in the main line 11). In the first embodiment, the first communication unit 31 acquires the power consumption of each branch circuit 12 as described above. The acquired power consumption is stored in the storage unit 37 in association with the presence / absence information (presence or absence of a person) stored in the storage unit 37 at the time of acquisition.

  When the second communication unit 36 receives the power reduction request from the DR server 60 (S12), the first determination unit 33 acquires the power reduction request based on the power consumption acquired by the first communication unit 31 and stored in the storage unit 37. Then, the first power, which is the minimum power consumption required for the facility 40, is determined (S13). Specifically, the first determination unit 33 determines, as the first power, an average value of power consumption during a predetermined period (a period of a predetermined length) when no person is present in the facility 40. Note that the first power may be determined before the second communication unit 36 receives the power reduction request from the DR server 60.

  Subsequently, the second determination unit 34 determines the second power that is the normal power consumption in the facility 40 based on the power consumption acquired by the first communication unit 31 and stored in the storage unit 37 ( S14). Specifically, the second determination unit 34 determines, as the second power, an average value of the power consumption when a person is present in the facility 40 in a predetermined period.

  Next, the calculation unit 35 calculates the reducible amount using the reducible power determined by comparing the second power and the first power (S15). Specifically, the calculation unit 35 calculates the reducible power, which is the power obtained by subtracting the first power from the second power, as the reducible amount.

  Next, the second communication unit 36 outputs (transmits) the calculated reducible amount to the DR server 60 based on the control of the control unit 32 (S16).

  Thereafter, when the DR period comes, the second communication unit 36 receives a DR signal from the DR server 60 (S17). In the DR signal, the amount of power reduction within the range of the amount of reduction is specified. The first communication unit 31 transmits a control signal for causing the plurality of electric devices 23 to reduce the power consumption of the reduction amount specified in the DR signal based on the control of the control unit 32 (S18).

  As described above, the controller 30 (the power management system 10) includes the first communication unit 31, the first determination unit 33, the second determination unit 34, the calculation unit 35, and the second communication unit 36. . The first communication unit 31 is an example of an acquisition unit, and acquires power consumption in the facility 40. The first determination unit 33 determines the first power that is the minimum power consumption of the facility 40 based on the power consumption acquired by the first communication unit 31. The second determination unit 34 determines the second power that is the normal power consumption in the facility 40 based on the power consumption acquired by the first communication unit 31. The calculation unit 35 calculates a possible power consumption reduction amount in the facility 40 based on a difference between the second power and the first power. The second communication unit 36 is an example of an output unit, and outputs the calculated reducible amount.

  As described above, in the power management system 10, the controller 30 outputs the possible reduction amount based on the power consumption exceeding the required minimum power consumption. For this reason, the DR server 60 can estimate the power reduction possible amount in the facility 40 in advance by receiving the reduction possible amount. That is, it is suppressed that the amount of power requested to be reduced in the DR period is significantly different from the amount of power actually reduced in the DR period, and stable DR is realized.

  Further, the first determination unit 33 may determine the first power based on the power consumption when the person is absent from the facility 40 among the power consumption obtained by the first communication unit 31. The second determination unit 34 may determine the second power based on the power consumption when the person is present in the facility 40 among the power consumption obtained by the first communication unit 31.

  Thereby, the controller 30 can determine the first power and the second power based on the presence or absence of a person in the facility 40.

  When the second power is larger than the first power, the calculation unit 35 determines the difference between the second power and the first power as reducible power, and indicates reducible power or reducible power according to the reducible power. The amount is calculated as a reducible amount.

  As described above, the controller 30 can calculate the reducible power or the reducible power amount by subtracting the first power from the second power.

[Operation Example 1]
Next, an operation example 1 of the controller 30 will be described. As shown in FIG. 3, the user can designate, via the information communication terminal 90, the branch circuit 12 for which the first power is to be calculated as a target branch circuit. Hereinafter, the operation of the controller 30 including the reception of the designation of the branch circuit 12 will be described as an operation example 1. FIG. 6 is a flowchart of the operation example 1. In FIG. 6, description will be made focusing on portions different from the basic operation in FIG. Steps that are substantially the same as the basic operations in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and different parts will be described.

  In the first operation example, before the first power is determined in step S13, the second communication unit 36 of the controller 30 receives the designation of the target branch circuit (S21). In FIG. 6, the second communication unit 36 receives the designation of the target branch circuit before receiving the power reduction request in step S12, but receives the designation of the target branch circuit after receiving the power reduction request in step S12. May be.

  The target branch circuit is specified through the information communication terminal 90. When the information communication terminal 90 is a smartphone, the target branch circuit is specified through a display screen as shown in FIG. FIG. 7 is a diagram illustrating an example of a display screen used to specify a target branch circuit. Note that such a display screen is displayed on the display unit of the information communication terminal 90 by executing a dedicated application installed in the information communication terminal 90 in advance. As the target branch circuit, a branch circuit 12 to which an electric device 23 requiring a constant power supply such as a refrigerator, a telephone, a modem, and a septic tank is preferably connected is specified.

  Then, in step S13, the first determination unit 33 determines, as the first power, the average value of the total power consumption of the target branch circuit when the person is absent in the facility 40 in a predetermined period. That is, the first determination unit 33 determines the first power by setting the power consumption of the branch circuits 12 other than the target branch circuit to 0. The subsequent operation is the same as the basic operation shown in FIG.

  As described above, the facility 40 includes the plurality of branch circuits 12 branched from the main line 11 used to supply power from the power system 80 to the facility 40, and the first communication unit 31 determines the power consumption in the facility 40 The information may be obtained for each branch circuit 12 included in 40. The power management system 10 may further include a second communication unit 36 that receives, from a user, designation of at least some of the plurality of branch circuits 12 as target branch circuits used for determining first power. Good. Then, the first determination unit 33 may determine the first power based on the power consumption of the target branch circuit acquired by the first communication unit 31. In this case, the second communication unit 36 is an example of a designation receiving unit.

  Thereby, the first determining unit 33 can determine the first power according to the designation of the user. In addition, the user will scrutinize the branch circuit 12 to be used in the DR period. Therefore, the configuration for receiving the designation of the branch circuit 12 can also increase the user's awareness of power saving.

[Operation Example 2]
Next, an operation example 2 of the controller 30 will be described. The controller 30 may have a power consumption instruction mode in which the power consumption measured by the power measurement device 20 in a state where the user actually operates the electric device 23 in the facility 40 is determined as the first power. Hereinafter, the operation of the controller 30 including the operation in the power consumption instruction mode will be described as Operation Example 2. FIG. 8 is a flowchart of the operation example 2. Note that, in FIG. 8, description will be made mainly on portions different from the basic operation in FIG. Steps that are substantially the same as the basic operations in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and different parts will be described.

  In the operation example 2, the first communication unit 31 acquires the power consumption in the facility 40 (S11). Here, for example, when a mode shift instruction is transmitted from the information communication terminal 90 to the controller 30, the controller 30 shifts to the power consumption instruction mode.

  In the power consumption instruction mode, the user turns on only the electric device 23 that the user wants to use (does not want to turn off) during the DR period. At this time, the set temperature of the air conditioner and the like may be set to a temperature expected during the DR period. Then, when the user presses the determination button on the display screen as shown in FIG. 9, an instruction is transmitted from the information communication terminal 90 to the controller 30, and the second communication unit 36 receives this instruction (S31). FIG. 9 is a diagram illustrating an example of a display screen on which an enter button for instructing first power is displayed.

  The first determination unit 33 calculates the power consumption (the power consumption of each branch circuit 12 measured by the power measurement device 20) in the facility 40 at the time when the second communication unit 36 receives the instruction (the time when the ≒ determination button is pressed). Is determined as the first power (S13).

  Specifically, the first determination unit 33 specifies the power consumption at the time when the second communication unit 36 receives the instruction (or the time closest to the time) by referring to the storage unit 37. When the power consumption is acquired from the power measuring device 20 in real time (or at fine timing), the first determination unit 33 determines whether the power consumption acquired immediately after the second communication unit 36 has received the instruction. The power may be determined as the first power.

  Further, the instruction transmitted from the information communication terminal 90 in response to the pressing of the determination button may include time information (time information measured by the information communication terminal 90) when the determination button is pressed. In this case, the first determining unit 33 refers to the time information included in the instruction received by the second communication unit 36 and the time information of the power consumption stored in the storage unit 37, and thereby determines the first power. Can be determined.

  After step S31, when the second communication unit 36 receives the power reduction request from the DR server 60 (S12), the second determination unit 34 determines the second power (S14). The subsequent operation is the same as the basic operation shown in FIG.

  As described above, the controller 30 may include the second communication unit 36 that receives an instruction for determining the current power consumption in the facility 40 as the first power from the user. In this case, the second communication unit 36 is an example of the instruction receiving unit. The first determination unit 33 determines the power consumption of the facility 40 acquired by the first communication unit 31 and the power consumption of the facility 40 when the second communication unit 36 receives the instruction as the first power. Is also good.

  Thereby, the first determination unit 33 can determine the power consumption in the facility 40 when receiving the user's instruction as the first power. The user can intuitively and easily determine the first power by transmitting an instruction from the information communication terminal 90 in a state where the power of the electric device 23 to be operated normally is turned on even during the DR period. In addition, since the user scrutinizes the electric device 23 to be operated in the DR period, such a power consumption instruction mode can increase the user's awareness of power saving.

[Operation example 3]
Next, an operation example 3 of the controller 30 will be described. In calculating the possible reduction amount, the generated power (power generation amount) of the power generation device 70 provided in the facility 40 may be considered. Hereinafter, the operation of the controller 30 including the process of calculating the reducible amount in consideration of the power generated by the power generation device 70 will be described as an operation example 3. FIG. 10 is a flowchart of the operation example 3. Note that, in FIG. 10, a description will be given focusing on portions different from the basic operation in FIG. 5. Steps that are substantially the same as the basic operations in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and different parts will be described.

  In the operation example 3, before the reducible amount is calculated in step S15, the second communication unit 36 of the controller 30 acquires the predicted power generation in the DR period of the power generation device 70 (S41). In the example of FIG. 10, predicted power generation is obtained after the second power is determined in step S14. In this case, the second communication unit 36 functions as a generated power acquisition unit.

  When the power generation device 70 is a photovoltaic power generation system, the predicted power generation is based on the amount of solar radiation during the DR period and the power generation efficiency of the power generation device 70, for example, by executing a dedicated application in the information communication terminal 90. Is calculated. The amount of solar radiation is provided from, for example, a dedicated server that provides weather information. In this case, the second communication unit 36 acquires the predicted generated power from the information communication terminal 90.

  Further, the predicted power generation may be provided from an external device such as a server of the maker of the power generation device 70. In this case, the second communication unit 36 acquires the predicted generated power from the external device.

  Further, the predicted generated power may be predicted by the control unit 32. For example, if information such as power generation efficiency is stored in the storage unit 37 and information on the amount of solar radiation is provided from the dedicated server that provides the weather information through the second communication unit 36, the control unit 32 performs the process of predicting the generated power. Can be calculated. In this case, the control unit 32 calculates predicted power generation and also functions as a power generation obtaining unit.

  When the power generation device 70 is a fuel cell system, the predicted power generation is determined based on the operation plan of the power generation device 70 during the DR period. In this case, for example, the predicted power generation is manually input by the user through the information communication terminal 90, and the second communication unit 36 acquires the predicted power generation.

  Further, the controller 30 may directly acquire an operation plan (predicted power generation in a DR period) from a device that holds the operation plan of the power generation device 70 (for example, the power generation device 70 itself). In this case, at least one of the first communication unit 31 and the second communication unit 36 functions as a generated power acquisition unit, and the device holding the operation plan of the power generation device 70 is connected to the at least one communication unit. Send the operation plan.

  After step S41, the calculation unit 35 determines the reducible power based on the second power, the first power, and the predicted power generation, and calculates the reducible amount according to the determined reducible power (S15). . Specifically, when the sum of the second power and the predicted generated power is larger than the first power, the calculation unit 35 determines the difference between the sum of the second power and the predicted generated power and the first power as the reducible power. . That is, the reducible power in consideration of the predicted generated power is obtained by the following equation.

      (Reducible power) = (second power)-(first power) + (predicted power generation)

  On the other hand, when the reducible power is 0 or less, the calculation unit 35 determines, for example, at least one of the second power review and the first power review by the first determination unit 33 or the second determination. Command to the unit 34.

  Subsequently, in step S16, a reducible amount expressed as power or a power amount is output based on the reducible power. The subsequent operation is the same as the basic operation shown in FIG.

  As described above, the facility 40 may further include the power generation device 70, and the power management system 10 may further include the second communication unit 36 that acquires the predicted power generation of the power generation device 70. In this case, the second communication unit 36 is an example of a generated power acquisition unit. The calculation unit 35 may calculate the reducible amount based on the first power, the second power, and the predicted power generation.

  Thereby, the controller 30 can calculate the reducible amount in consideration of the predicted generated power of the power generation device 70.

  If the sum of the second power and the predicted power is greater than the first power, the calculation unit 35 determines the difference between the sum of the second power and the predicted power and the first power as reducible power, and Alternatively, the reducible power amount according to the reducible power may be calculated as the reducible amount.

  Thereby, the controller 30 can calculate the reducible power or the reducible power amount in consideration of the predicted power generation of the power generation device 70.

[Operation Example 4]
Next, an operation example 4 of the controller 30 which is different from the basic operation will be described. In the calculation of the reducible amount, the charging power of the power storage device 75 provided in the facility 40 (the power charged in the power storage device 75) and the discharge power (the power discharged from the power storage device 75) may be considered. Hereinafter, the operation of the controller 30 including the process of calculating the reducible amount in consideration of the charging power and the discharging power of the power storage device 75 will be described as Operation Example 4. FIG. 11 is a flowchart of the operation example 4. Note that, in FIG. 11, the description will be made focusing on portions different from the basic operation in FIG. Steps that are substantially the same as the basic operations in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and different parts will be described.

  In the operation example 4, before the reducible amount is calculated in step S15, the second communication unit 36 of the controller 30 acquires the plan information of the power storage device 75 in the DR period (S51). In the example of FIG. 11, plan information is acquired after the second power is determined in step S14. In this case, the second communication unit 36 functions as a plan acquisition unit.

  The plan information is information indicating a schedule of charging and discharging of the power storage device 75. The plan information includes information on the power to be charged in the power storage device 75 during the DR period and information on the power to be discharged from the power storage device 75 during the DR period. The controller 30 acquires the plan information from a device that holds the plan information of the power storage device 75. The device that holds the plan information of the power storage device 75 is, for example, the power storage device 75, the control device of the power storage device 75, or the management device of the power storage device 75. In this case, at least one of the first communication unit 31 and the second communication unit 36 functions as a plan acquisition unit, and the device holding the plan information of the power storage device 75 transmits the plan information to the at least one communication unit. Submit information.

  After step S51, the calculation unit 35 determines the reducible power based on the second power, the first power, and the plan information, and calculates the reducible amount according to the determined reducible power (S15).

  Specifically, the calculation unit 35 determines that the third power that is the sum of the second power and the power discharged from the power storage device 75 is the sum of the first power and the power that is charged in the power storage device 75. When it is larger than the fourth power, the difference between the third power and the fourth power is set as the reducible power. That is, the reducible power in consideration of the plan information is obtained by the following equation.

      (Reducible power) = (second power)-(first power) + (discharge power)-(charge power)

  On the other hand, when the third power is equal to or less than the fourth power and the reducible power is equal to or less than 0, the control unit 32 performs at least one of the review of the second power and the review of the first power. It instructs the first determining unit 33 or the second determining unit 34. Further, the control unit 32 may instruct a device that holds the plan information to review the plan information.

  Subsequently, in step S16, a reducible amount expressed as power or a power amount is output based on the reducible power. The subsequent operation is the same as the basic operation shown in FIG.

  As described above, the facility 40 further includes the power storage device 75, and the power management system 10 further includes the second communication unit 36 that acquires predetermined charge / discharge plan information of the power storage device 75. Is also good. In this case, the second communication unit 36 is an example of a plan acquisition unit. The calculation unit 35 may calculate the reducible amount based on the difference between the first power and the second power and the plan information.

  Accordingly, controller 30 can calculate the possible reduction amount in consideration of the plan information of power storage device 75.

  The third power, which is the sum of the second power and the power discharged from the power storage device determined in the plan information, is the sum of the first power and the power charged in the power storage device 75 defined in the plan information. It may be larger than the fourth power. In such a case, the calculation unit 35 calculates the difference between the third power and the fourth power as the reducible power, and calculates the reducible power or the reducible power amount corresponding to the reducible power as the reducible amount. Is also good.

  Thereby, controller 30 can calculate the reducible power or the reducible power amount in consideration of the plan information of power storage device 75.

(Embodiment 2)
In the first embodiment, the reducible amount is calculated by the controller 30, but the reducible amount may be calculated by the DR server 60. That is, the DR server 60 may include a component for calculating the reducible amount instead of the controller 30. FIG. 12 is a block diagram showing a configuration of such a power management system according to the second embodiment.

  In the following, the second embodiment will be described focusing on portions different from the first embodiment, and the same description as the first embodiment will be omitted. In the second embodiment, the controller 30 is described as not including a component for calculating the reducible amount.

  The power management system 110 according to the second embodiment includes a controller 30 provided in each of a plurality of facilities 40, a host server 50, and a DR server 160.

  The DR server 160 is an example of a power management device, and includes a server communication unit 131, a server control unit 132, and a server storage unit 137. The server control unit 132 includes a first determination unit 133, a second determination unit 134, a calculation unit 135, an output unit 136, and a DR planning unit 138.

  The server communication unit 131 communicates with the host server 50 and the controller 30. For example, the server communication unit 131 transmits a DR signal to the controller 30 based on the control of the server control unit 132. In addition, the server communication unit 131 functions as an acquisition unit, and acquires power consumption from the controllers 30 provided in each of the plurality of facilities 40. Note that the server communication unit 131 may acquire the power consumption in the facility 40 from the power measuring device 20 (not shown in FIG. 12) provided in each of the plurality of facilities 40 without using the controller 30.

  In addition, the server communication unit 131 can also acquire presence / absence information, designation of a branch circuit, and the like from the controller 30 (or the information communication terminal 90 not shown in FIG. 12).

  The server communication unit 131 is specifically a communication module (communication circuit) that performs communication using the Internet. However, if the server communication unit 131 can communicate with the host server 50 and the controller 30 (the power measurement device 20), A communication module using the communication method described above may be used.

  The server storage unit 137 stores the power consumption of each facility 40 acquired by the server communication unit 131. The server storage unit 137 is specifically realized by an HDD (Hard Disc Drive) or the like.

  The server control unit 132 is realized by a processor, a microcomputer, or a dedicated circuit, and performs information processing such as storage of the power consumption acquired by the server communication unit 131 in the server storage unit 137 and management of the stored power consumption. . In the DR control, the server control unit 132 transmits a DR signal to the plurality of controllers 30 using the server communication unit 131.

  Further, the server control unit 132 calculates the reducible amount, and outputs the calculated reducible amount to the DR planning unit 138 via the output unit 136. Hereinafter, each component of the server control unit 132 will be described in detail.

  The first determining unit 133 determines the first power based on the power consumption acquired by the server communication unit 131. The operation of the first determination unit 133 is the same as that of the first determination unit 33. The determination of the second power is performed for each of the plurality of facilities 40.

  The second determining unit 134 determines the second power based on the power consumption acquired by the server communication unit 131. The operation of the second determining unit 134 is the same as that of the second determining unit 34. The determination of the second power is performed for each of the plurality of facilities 40.

  The calculating unit 135 calculates the reducible amount based on the determined second power and the determined first power. The operation of the calculation unit 135 is the same as that of the calculation unit 35. The calculation of the reducible amount is performed for each of the plurality of facilities 40.

  The output unit 136 outputs the calculated reducible amount to the DR planning unit 138.

  The DR planning unit 138 acquires the output reducible amount, and generates a DR signal in which power reduction within the reducible amount range is specified based on the acquired reducible amount. In addition, the DR planning unit 138 transmits the DR signal generated in the DR period to the controller 30. The generation and transmission of the DR signal are performed for each of the plurality of facilities 40.

  Note that the DR signal may be a signal specifying the maximum power consumption to be followed by the user of the facility 40 during the DR period. In this case, the DR server 160 calculates the maximum power consumption in each of the plurality of facilities 40 based on the possible reduction amount.

  As described above, the server communication unit 131 acquires the power consumption of each of the plurality of facilities 40, and the first determination unit 133 may determine the first power of each of the plurality of facilities 40. The server communication unit 131 is an example of an acquisition unit.

  Accordingly, the DR server 160 can calculate the first power in each of the plurality of facilities 40.

  If the server communication unit 131 cannot acquire the power consumption of some of the plurality of facilities 40 due to a communication failure or the like, the server control unit 132 can reduce the number of the facilities 40. The quantity cannot be calculated. In such a case, the server control unit 132 may calculate the possible reduction amount of another facility 40 based on the power consumption of one facility 40.

  For example, if the server storage unit 137 stores user information of each facility 40 (information on the size of the facility 40, family structure, and the electric equipment 23 installed in the facility 40), the server control unit The 132 can specify a facility 40 similar to the other facility 40 by referring to such user information. Then, the server control unit 132 calculates the reducible amount based on the power consumption of the specified facility 40, and substitutes the calculated reducible amount as the reducible amount of the facility 40 for which power consumption could not be obtained. Can be.

(Other embodiments)
Although the power management system according to the embodiment has been described above, the present invention is not limited to the above embodiment.

  For example, in the above embodiment, the presence / absence information indicating the presence / absence of a person in the facility 40 was manually changed by the user. However, the controller 30 may automatically determine the presence or absence of a person in the facility 40.

  For example, when a smartphone exists in the facility 40, the controller 30 determines that there is a person in the facility 40, and when no smartphone exists in the facility 40, the controller 30 determines that there is no person in the facility 40. be able to. The controller 30 may change the presence / absence information based on such a determination.

  Note that whether or not the smartphone exists in the facility 40 can be determined by wireless communication. The determination as to whether or not the smartphone exists in the facility 40 can be made specifically by using a search protocol such as ARP (Address Resolution Protocol) or UPnP (Universal Plug and Play). In addition, a standard protocol such as ECHONET-Lite may be used to determine whether a smartphone exists in the facility 40. Whether a smartphone exists in the facility 40 can also be determined based on the position information of the GPS module of the smartphone.

  Further, in the above embodiment, the first power is determined based on the power consumption when no person is present at the facility, and the second power is determined based on the power consumption when the person is present at the facility. . However, it is also possible to determine the first power from the power consumption when a person is present in the facility. Specifically, the minimum value of the comparison value is obtained within a range that satisfies the condition that the time when the power consumption when the facility is occupied by a person continuously becomes less than the comparison value exceeds a predetermined maintenance time. Can be estimated as the first power. Such a method may be used to determine the first power.

  Further, the communication method between the devices described in the above embodiment is not particularly limited. For example, between devices, wired communication may be performed instead of wireless communication. Specifically, the wired communication is power line communication (PLC: Power Line Communication) or communication using a wired LAN.

  Also, the allocation of the components to the devices in the above embodiment is an example. For example, the function of the controller may be realized by a plurality of devices, or the controller and the power measurement device may be realized as one device. For example, the controller may include a first determination unit and a second determination unit, and the DR server may include a calculation unit.

  Further, in the above embodiment, each component may be configured by 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 a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

  Each component may be a circuit (or an integrated circuit). These circuits may constitute one circuit as a whole, or may be separate circuits. Each of these circuits may be a general-purpose circuit or a dedicated circuit.

  Further, general or specific aspects of the present invention may be realized by a recording medium such as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable CD-ROM. Further, the present invention may be realized by any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. For example, the present invention may be realized as a power management device (the controller of the first embodiment or the DR server of the second embodiment). Further, the present invention may be realized as a power management method executed by a power management system, or may be realized as a program for causing a computer to execute such a power management method.

  The order of the plurality of processes in the operation of the power management system described in the above embodiment is an example. The order of the plurality of processes may be changed, and the plurality of processes may be executed in parallel.

  Further, for example, in the above-described embodiment, a process executed by a specific processing unit may be executed by another processing unit.

  In addition, a form obtained by performing various modifications conceivable by those skilled in the art to each embodiment, or realized by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. Embodiments are also included in the present invention.

10, 110 Power management system 11 Main line 12 Branch circuit 30 Controller (power management device)
31 first communication unit (acquisition unit)
33, 133 First determination unit 34, 134 Second determination unit 35, 135 Calculation unit 36 Second communication unit (output unit, designation reception unit, instruction reception unit, generated power acquisition unit, plan acquisition unit)
40 facilities 160 DR server (power management device)
70 power generation device 75 power storage device 131 server communication unit (acquisition unit)
136 Output section

Claims (12)

An acquisition unit for acquiring power consumption in the facility;
Based on the power consumption acquired by the acquisition unit, a first determination unit that determines the first power that is the minimum required power consumption of the facility,
Based on the power consumption acquired by the acquisition unit, a second determination unit that determines second power that is normal power consumption in the facility,
Based on the difference between the second power and the first power, a calculation unit that calculates a possible amount of power consumption reduction in the facility,
An output unit that outputs the calculated reducible amount,
The first determination unit, based on power consumption when a person is absent in the facility among the power consumption obtained by the obtaining unit, determines the first power,
The power management system, wherein the second determination unit determines the second power based on power consumption when a person is present in the facility among the power consumptions acquired by the acquisition unit. A power management system,
An acquisition unit for acquiring power consumption in the facility;
Based on the power consumption acquired by the acquisition unit, a first determination unit that determines the first power that is the minimum required power consumption of the facility,
Based on the power consumption acquired by the acquisition unit, a second determination unit that determines second power that is normal power consumption in the facility,
Based on the difference between the second power and the first power, a calculation unit that calculates a possible amount of power consumption reduction in the facility,
An output unit that outputs the calculated reducible amount,
The facility includes a plurality of branch circuits branched from a main line used to supply power to the facility,
The acquisition unit acquires power consumption in the facility for each branch circuit that the facility has,
The power management system further includes a designation receiving unit that receives, from a user, a designation as a target branch circuit used for determining the first power, at least a part of the plurality of branch circuits.
The power management system, wherein the first determination unit determines the first power based on power consumption of the target branch circuit acquired by the acquisition unit. An acquisition unit for acquiring power consumption in the facility;
Based on the power consumption acquired by the acquisition unit, a first determination unit that determines the first power that is the minimum required power consumption of the facility,
Based on the power consumption acquired by the acquisition unit, a second determination unit that determines second power that is normal power consumption in the facility,
Based on the difference between the second power and the first power, a calculation unit that calculates a possible amount of power consumption reduction in the facility,
An output unit that outputs the calculated reducible amount,
An instruction receiving unit that receives an instruction for determining the current power consumption of the facility as the first power from a user,
A power management system configured to determine, as the first power, power consumption of the facility acquired by the acquisition unit, the power consumption at the facility when the instruction receiving unit receives an instruction; . The acquisition unit acquires power consumption in each of a plurality of facilities including the facility,
The power management system according to any one of claims 1 to 3 , wherein the first determination unit determines the first power for each of the plurality of facilities. When the second power is larger than the first power, the calculation unit sets a difference between the second power and the first power as reducible power, and the reducible power, or according to the reducible power. The power management system according to any one of claims 1 to 4 , wherein the reducible power amount is calculated as the reducible amount. The facility further includes a power generator,
The power management system further includes a generated power obtaining unit that obtains predicted generated power of the power generation device,
The power management according to any one of claims 1 to 4 , wherein the calculation unit calculates the reducible amount based on a difference between the first power and the second power and the predicted power generation. system. When the sum of the second power and the predicted generated power is larger than the first power, the calculation unit sets the difference between the sum of the second power and the predicted generated power and the first power as reducible power. The power management system according to claim 6 , wherein the reducible power or a reducible power amount corresponding to the reducible power is calculated as the reducible amount. The facility further includes a power storage device,
The power management system further includes a plan acquisition unit configured to acquire plan information of charging and discharging of the power storage device, which is predetermined.
The calculating unit, the first power and the difference between the second power, and based on said planning information, the power management system according to any one of claims 1 to 4 for calculating the reducible amount. An acquisition unit that acquires power consumption in a facility including a power storage device,
Based on the power consumption acquired by the acquisition unit, a first determination unit that determines the first power that is the minimum required power consumption of the facility,
Based on the power consumption acquired by the acquisition unit, a second determination unit that determines second power that is normal power consumption in the facility,
A calculating unit for calculating a possible power consumption reduction amount in the facility;
An output unit that outputs the calculated reducible amount,
A plan acquisition unit that acquires plan information of charging and discharging of the power storage device, which is predetermined,
The third power, which is the sum of the second power and the power discharged from the power storage device determined in the plan information, between the first power and the power charged in the power storage device defined in the plan information If the fourth power is greater than the sum, the calculation unit sets the difference between the third power and the fourth power as reducible power, and the reducible power, or the reducible power according to the reducible power. A power management system that calculates a power amount as the reducible amount. An acquisition unit for acquiring power consumption in the facility;
Based on the obtained power consumption by the acquisition unit, a first determination unit for determining a first power is a power consumption which is the minimum required to the facility,
Based on the power consumption acquired by the acquisition unit, a second determination unit that determines second power that is normal power consumption in the facility,
Based on the difference between the second power and the first power, a calculation unit that calculates a possible amount of power consumption reduction in the facility,
An output unit that outputs the calculated reducible amount ,
The first determination unit, based on power consumption when a person is absent in the facility among the power consumption obtained by the obtaining unit, determines the first power,
The power management device , wherein the second determination unit determines the second power based on power consumption when a person is present in the facility among the power consumptions acquired by the acquisition unit. Acquire the power consumption at the facility,
Based on the obtained power consumption, it determines a first power is a power consumption which is the minimum required to the facility,
Based on the obtained power consumption, determine the second power that is the normal power consumption in the facility,
Based on the difference between the second power and the first power, calculate the possible amount of power consumption in the facility,
Outputting the calculated possible reduction amount ,
In the determination of the first power, the first power is determined based on power consumption when a person is absent in the facility among the acquired power consumption,
In the power management method , the second power is determined based on power consumption when a person is present in the facility among the acquired power consumptions . A program for causing a computer to execute the power management method according to claim 11 .

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