Charge / discharge control method and charge / discharge control system

Abstract

To provide a charge / discharge control method and a charge / discharge control system capable of suppressing an increase in a computation load of a control section, which manages a facility, and suppressing an increase in a communication load between the control section and the facility.SOLUTION: A charge / discharge control method and a charge / discharge control system relate to slave units installed on a facility basis and a master unit connected with a plurality of slave units in a power system in which power is mutually exchanged between a plurality of facilities. The slave unit transmits to the master unit power information indicating supply power defining a direction from the facility to the power system as positive. Based on the power information received from the slave units, the master unit generates first command information indicating a total value of the supply power over the slave units. Based on the first command information received from the master unit and a priority of the facility relating to the slave unit, the slave unit calculates a charge / discharge power command value with respect to one or more charge / discharge control elements included in the facility and controls the charge / discharge control elements.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a charge / discharge control method and a charge / discharge control system. [Background technology]

[0002] A technology has been proposed for an energy management system that centrally manages the charging and discharging of in-home storage units in an area with multiple homes (facilities) equipped with solar power generation units and in-home storage units, and efficiently charges and discharges and exchanges power (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6146624 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 has the problem that as the number of facilities increases, the calculation load on the control unit that manages the facilities tends to increase, and the communication load between the control unit and the facilities tends to increase.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a charge / discharge control method and a charge / discharge control system that can suppress an increase in the calculation load of a control unit that manages a facility and also suppress an increase in the communication load between the control unit and the facility. [Means for solving the problem]

[0006] The charge / discharge control method and charge / discharge control system according to the present disclosure relate to a power system in which power is shared among a plurality of facilities, and relate to a slave unit installed at each facility and a master unit connected to the plurality of slave units. The slave units transmit power information indicating supply power, with the positive direction being from the facility toward the power system, to the master unit, and the master unit generates first command information indicating a total value of supply power to the slave units based on the power information received from the slave units. The slave units calculate charge / discharge power command values ​​for one or more charge / discharge control elements provided in the facility based on the first command information received from the master unit and the priority of the facility related to the slave units, and control the charge / discharge control elements. [Effects of the Invention]

[0007] According to the present disclosure, even if the number of facilities increases, it is possible to suppress an increase in the computational load of the control unit that manages the facilities, and also to suppress an increase in the communication load between the control unit and the facilities. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a configuration of a charge / discharge control system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a sequence diagram illustrating a processing example of the charge / discharge control system according to an embodiment of the present disclosure. [Figure 3] 10 is a flowchart showing a first example of a calculation process of a charge / discharge power command value. [Figure 4] 10 is a flowchart showing a second example of the calculation process of a charge / discharge power command value. [Figure 5] 10 is a flowchart showing a third example of a process for calculating a charge / discharge power command value. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, several exemplary embodiments will be described with reference to the drawings. Note that common parts in the drawings are given the same reference numerals, and duplicated explanations will be omitted.

[0010] [Charge / discharge control system configuration] Fig. 1 is a block diagram showing the configuration of a charge / discharge control system according to an embodiment of the present disclosure. As shown in Fig. 1, the charge / discharge control system relates to a power system PS that shares power among a plurality of facilities FC. The charge / discharge control system includes a slave unit 21 and a master unit 11, which will be described later. The charge / discharge control system manages a plurality of facilities FC. Although three facilities FC are shown in Fig. 1, the number of facilities FC managed by the charge / discharge control system is not limited to three. The number of facilities FC managed by the charge / discharge control system may be one or more.

[0011] For example, in order to share power among a plurality of facilities FC, the power system PS may receive power from a facility FC under the management of the charge / discharge control system and transmit power to another facility FC under the management of the charge / discharge control system. Also, the power system PS may transmit power received from a facility FC under the management of the charge / discharge control system to a facility outside the management of the charge / discharge control system. Furthermore, the power system PS may transmit power received from a facility outside the management of the charge / discharge control system to a facility FC under the management of the charge / discharge control system.

[0012] Each facility FC includes a slave unit 21, a power meter 22, and one or more charge / discharge control elements 25. In addition, each facility FC may include a load element 23 and a power generation element 24.

[0013] The power meter 22 measures the supply power in a positive direction from the facility FC to the power system PS. The power meter 22 is connected to the slave device 21 and transmits to the slave device 21 "power information" relating to the supply power.

[0014] In each facility FC, the power generated by the power generation element 24 is supplied to the load element 23 or the charge / discharge control element 25. Alternatively, the power generated by the charge / discharge control element 25 is supplied to the load element 23.

[0015] If the load element 23 or the charge / discharge control element 25 cannot generate the required power using the power generation element 24, the facility FC receives power from the power system PS. In this case, the supply power measured by the power meter 22 will be a negative value. On the other hand, if the power generation element 24 generates more power than the load element 23 or the charge / discharge control element 25 needs, the facility FC will transmit the surplus power to the power system PS. In this case, the supply power measured by the power meter 22 will be a positive value.

[0016] The load elements 23 are elements that consume power in the facility FC. For example, the load elements 23 are air conditioners, elevators, automatic doors, lighting devices, etc. that are provided in the facility FC. The load elements 23 are not limited to the examples given here.

[0017] The power generation element 24 is an element that generates power in the facility FC. For example, the power generation element 24 is a device that generates power based on various types of energy, such as solar power, hydroelectric power, wind power, geothermal power, and biomass power. The power generation element 24 may be a device that generates power based on renewable energy, or may be a device that generates power based on other types of energy. The power generation element 24 is not limited to the examples given here.

[0018] The charge / discharge control element 25 is an element capable of charging or discharging. In particular, the charge / discharge control element 25 controls charging or discharging based on a command from the slave device 21. For example, the charge / discharge control element 25 may be an electric vehicle parked in the facility FC. Alternatively, the charge / discharge control element 25 may be a storage battery provided in the facility FC. The charge / discharge control element 25 is not limited to the examples given here.

[0019] The slave device 21 is connected to the master device 11 (described later) so as to be able to communicate with it. The slave device 21 includes a communication device and a controller. Here, the controller is a general-purpose computer including a CPU (Central Processing Unit), a memory, and an input / output unit. The master device 11 and the slave device 21 are connected via a wireless or wired communication circuit via the communication device.

[0020] The slave unit 21 transmits power information indicating the supply power, with the direction from the facility FC toward the power system PS being positive, to the master unit 11. Note that the slave unit 21 may transmit the power information received from the power meter 22 as is, or may transmit the received power information averaged over a predetermined time interval as power information to the master unit 11. The method of obtaining the power information to be transmitted to the master unit 11 is not limited to the example given here.

[0021] The slave device 21 may also transmit request information indicating the required power required by the charge / discharge control element 25 to the master device 11. Here, the slave device 21 may calculate the required power based on an index indicating the charge rate or state of charge (SOC) of the charge / discharge control element 25. The slave device 21 may also transmit the request information received from the charge / discharge control element 25 to the master device 11. The slave device 21 may transmit the request information received from the charge / discharge control element 25 as is, or may transmit a value obtained by averaging the received request information at a predetermined time interval to the master device 11 as the request information.

[0022] Alternatively, the slave device 21 may calculate the power required for the power system PS by the load element 23, the power generation element 24, and the charge / discharge control element 25 as a whole, and transmit information indicating the calculated power as request information to the master device 11. The method of obtaining the request information to be transmitted to the master device 11 is not limited to the example given here.

[0023] The master device 11 is connected to a plurality of slave devices so as to be able to communicate with them. The master device 11 includes a communication device and a controller. Here, the controller is a general-purpose computer including a CPU (Central Processing Unit), a memory, and an input / output unit. The master device 11 and the slave devices 21 are connected via a wireless or wired communication circuit via the communication device.

[0024] The master unit 11 receives power information from each of the slave units 21 installed in the multiple facilities FC. That is, the master unit 11 acquires the power information transmitted from each facility FC. Then, the master unit 11 generates first command information indicating the total value of power supply to the slave units 21 based on the received power information. That is, the master unit 11 adds up all the power supplies of the multiple facilities FC to calculate the total value and generates the first command information.

[0025] The master unit 11 transmits the first command information to the slave units 21. For example, the master unit 11 may transmit the first command information to all of the slave units 21 by broadcast transmission.

[0026] Furthermore, master unit 11 may receive request information from each of slave units 21 installed in a plurality of facility FCs. In other words, master unit 11 may acquire request information transmitted from each facility FC. Master unit 11 may then generate second command information indicating the total value of requested power across slave units 21 based on the received request information. In other words, master unit 11 may add up all the requested powers of a plurality of facility FCs to calculate the total value and generate the second command information.

[0027] The master unit 11 may transmit the second command information to the slave units 21. For example, the master unit 11 may transmit the second command information to all of the slave units 21 by broadcast transmission.

[0028] Next, the slave 21 receives the first command information and calculates a charge / discharge power command value for one or more charge / discharge control elements 25 included in the facility FC based on the first command information and the priority of the facility FC related to the slave 21. The priority of the facility FC will be described later.

[0029] The slave device 21 controls the charge / discharge control element 25 based on the charge / discharge power command value. For example, the slave device 21 may control the charge / discharge control element 25 by autonomous decentralized control or centralized control. The method by which the slave device 21 controls the charge / discharge control element 25 based on the charge / discharge power command value is not limited to the example given here.

[0030] [Calculation of charge / discharge power command value] Regarding the calculation of the charge / discharge power command value, for example, the slave device 21 may set a predetermined initial value as the charge / discharge power command value. The initial value may be set based on various conditions, such as the number of charge / discharge control elements 25, the charge capacity of the charge / discharge control elements 25, the power required by the load element 23, and so on.

[0031] The slave 21 may update the charge / discharge power command value by adding the product of the total value of the supply power indicated by the first command information and the priority of the facility FC to the charge / discharge power command value.

[0032] As a result, even if the number of facility FCs increases, it is possible to suppress an increase in the calculation load on the master unit 11 that manages the facility FCs, and also to suppress an increase in the communication load between the master unit 11 and the slave units 21 provided in the facility FCs. Furthermore, charge and discharge control in the charge and discharge control element 25 provided in the facility FC can be performed based on the power status of the entire plurality of facility FCs.

[0033] In addition, the slave unit 21 may update the charge / discharge power command value by adding the larger value of the supply power of the facility FC related to the slave unit 21 and the product of the total value of the supply power indicated by the first command information and the priority to the charge / discharge power command value.

[0034] This makes it possible to promote power consumption within the facility FC associated with the slave device 21 when there is surplus power in the facility FC associated with the slave device 21. In particular, even when there is a power supply shortage across multiple facility FCs, it is possible to reduce the amount of power being sent from a facility FC with surplus power to a facility FC with a power shortage. As a result, it is possible to reduce the cost associated with power sending.

[0035] In addition, if there is a shortage of power in the facility FC associated with the slave device 21 and there is excess power supplied across the multiple facility FCs, the excess power supplied across the multiple facility FCs can be received and utilized by the facility FC associated with the slave device 21.

[0036] Furthermore, when there is a power shortage in the facility FC related to the slave device 21 and the supply power of the multiple facilities FC as a whole is insufficient, the charge / discharge power command value can be lowered to reduce the power required by the charge / discharge control element 25. As a result, the power system PS can reduce the power received from facilities outside the management of the charge / discharge control system, thereby reducing costs.

[0037] Furthermore, the slave device 21 may acquire a time limit within which charging must be completed for a charging element that requires charging, among the charge / discharge control elements 25 included in the facility FC associated with the slave device 21. Then, the slave device 21 may determine whether or not charging of the charging element can be completed by the time limit using the power supplied by the facility FC associated with the slave device 21.

[0038] Here, the slave unit 21 may identify the charging element that needs to be charged based on a signal from the charge / discharge control element 25. For example, the slave unit 21 may identify the charging element that needs to be charged based on an index representing the charge rate or state of charge (SOC) of the charge / discharge control element 25. The slave unit 21 may also predict the power demand in the facility FC and determine, based on the prediction result, whether or not the charging of the charging element can be completed before the time limit elapses.

[0039] If the identified charging element is an electric vehicle, the slave device 21 may acquire a time limit based on a scheduled time for the electric vehicle to depart from the facility FC. The scheduled time may be set by the user of the electric vehicle. The slave device 21 may also calculate the scheduled time based on the driving history of the electric vehicle and the behavior history of the user. Additionally, if the identified charging element has a peak time period during which the discharged power reaches its peak, the slave device 21 may acquire the remaining time from the current time until the peak time period as the time limit.

[0040] If it is determined that charging of the charging element can be completed before the time limit elapses, the slave unit 21 may update the charge / discharge power command value by adding the smaller value of the supply power of the facility FC related to the slave unit 21 and the product of the total value of the supply power indicated by the first command information and the priority of the facility FC to the charge / discharge power command value.

[0041] As a result, when there is excess power in the facility FC associated with the slave device 21 and there is a power supply shortage across multiple facilities FC, power can be lent from the facility FC with excess power to the facility FC with a power shortage. Since there is no need to rush to charge the charging elements, the use of power in the facility FC with a power shortage can be promoted, with priority given to charging the charging elements.

[0042] Furthermore, when there is a power shortage in the facility FC associated with the slave 21 and there is a surplus of power supplied across multiple facilities FCs, it is possible to reduce the amount of power being sent from the facility FC with the surplus power to the facility FC with the power shortage. This also reduces the cost of sending power. Because there is no need to rush to charge the charging elements, it is possible to reduce the amount of power being sent from the facility FC with the surplus power to the facility FC with the power shortage, thereby reducing the cost of sending power.

[0043] If it is determined that charging of the charging element cannot be completed before the time limit has elapsed, the slave unit 21 may update the charge / discharge power command value by adding the larger value of the supply power of the facility FC related to the slave unit 21 and the product of the total value of the supply power indicated by the first command information and the priority of the facility FC to the charge / discharge power command value.

[0044] This makes it possible to promote power consumption within the facility FC associated with the slave device 21 when there is excess power in the facility FC associated with the slave device 21 and charging of the charging element needs to be expedited. In particular, even when there is a power supply shortage across multiple facility FCs, it is possible to reduce the amount of power sent from a facility FC with excess power to a facility FC with a power shortage, thereby reducing the possibility that charging of the charging element will not be completed before the time limit has elapsed. It is also possible to reduce the cost associated with power sending.

[0045] Furthermore, when there is a power shortage in the facility FC associated with the slave device 21 and charging of the charging element needs to be rushed, the excess supply power from all of the multiple facility FCs can be received by the facility FC associated with the slave device 21 and used to charge the charging element. As a result, it is possible to reduce the possibility that charging of the charging element will not be completed before the time limit has elapsed.

[0046] Alternatively, the slave device 21 may update the charge / discharge power command value so as not to exceed the peak power available to the facility FC. For example, it is assumed that the peak power (power capacity) that can pass through the power line between the power system PS and the facility FC is set. When the charge / discharge power command value exceeds the peak power, the slave device 21 may reduce the charge / discharge power command value to suppress the power used in the facility FC.

[0047] [Priority calculation] For example, the slave device 21 may receive the second command information and set the priority of the facility FC based on the ratio of the required power of the facility FC related to the slave device 21 to the total value of the required power indicated by the second command information. Alternatively, the slave device 21 may set the priority of the facility FC based on the total chargeable capacity of the charge / discharge control elements 25 in the facility FC and the number of charge / discharge control elements 25. Furthermore, the slave device 21 may set the priority of the facility FC based on user requests, the number and ratio of users who wish to charge using surplus power from renewable energy, etc.

[0048] [Example of processing in a charge / discharge control system] 2 is a sequence diagram showing an example of processing of the charge / discharge control system according to the embodiment of the present disclosure. The processing shown in FIG. 2 may be repeatedly executed.

[0049] In step S101, the slave device 21 acquires power information.

[0050] In step S103, the handset 21 acquires the request information.

[0051] In step S105, the slave unit 21 transmits the power information / request information, and the master unit 11 receives the power information / request information.

[0052] In step S107, master unit 11 generates first command information.

[0053] In step S109, master unit 11 generates second command information.

[0054] In step S111, parent device 11 transmits the first command information / second command information, and child device 21 receives the first command information / second command information.

[0055] In step S113, the slave device 21 sets the priority based on the second command information.

[0056] In step S115, the slave device 21 executes a process of calculating a charge / discharge power command value.

[0057] In step S117, the slave device 21 controls the charge / discharge control elements based on the charge / discharge power command value.

[0058] [Calculation process of charge / discharge power command value] 3 is a flowchart showing a first example of the calculation process of the charge / discharge power command value (step S115). In step S201, the slave device 21 may update the charge / discharge power command value P by adding the product of the total value S of the supply power indicated by the first command information and the priority γ of the facility FC to the charge / discharge power command value P.

[0059] 4 is a flowchart showing a second example of the calculation process of the charge / discharge power command value (step S115). In step S203, the slave device 21 may update the charge / discharge power command value P by adding the larger value of the supply power Q of the facility FC related to the slave device 21 and the product of the total value S of the supply power indicated by the first command information and the priority γ to the charge / discharge power command value P.

[0060] 5 is a flowchart showing a third example of the calculation process of the charge / discharge power command value (step S115). In step S205, the slave device 21 may determine whether or not the charging of the charging element can be completed by the power supplied from the facility FC related to the slave device 21 before the time limit elapses.

[0061] If the process can be completed before the time limit elapses (YES in step S205), in step S207, the slave unit 21 may update the charge / discharge power command value P by adding the smaller of the supply power Q of the facility FC related to the slave unit 21 and the product of the total supply power value S indicated by the first command information and the priority γ of the facility FC to the charge / discharge power command value P.

[0062] On the other hand, if the process cannot be completed before the time limit has elapsed (NO in step S205), in step S209, the slave unit 21 may update the charge / discharge power command value P by adding the larger value of the supply power Q of the facility FC related to the slave unit 21 and the product of the total supply power value S indicated by the first command information and the priority γ of the facility FC to the charge / discharge power command value P.

[0063] [Effects of the embodiment] As described above in detail, the charge / discharge control method and charge / discharge control system according to the present disclosure relate to a power system in which power is shared among a plurality of facilities, and relate to a slave unit installed at each facility and a master unit connected to the plurality of slave units. The slave units transmit power information indicating supply power, with the direction from the facility toward the power system being positive, to the master unit, and the master unit generates first command information indicating a total value of supply power to the slave units based on the power information received from the slave units. The slave units calculate charge / discharge power command values ​​for one or more charge / discharge control elements provided in the facility based on the first command information received from the master unit and the priority of the facility related to the slave units, and control the charge / discharge control elements.

[0064] As a result, even if the number of facilities increases, it is possible to suppress an increase in the calculation load of the control unit that manages the facilities, and also to suppress an increase in the communication load between the control unit and the facilities. In other words, even if the number of facility FCs increases, it is possible to suppress an increase in the calculation load of the master unit 11 that manages the facility FC, and also to suppress an increase in the communication load between the master unit 11 and the slave units 21 provided in the facility FC. Furthermore, charge and discharge control in the charge and discharge control element 25 provided in the facility FC can be performed based on the power status of the entire plurality of facility FCs.

[0065] Furthermore, in the charge / discharge control method and charge / discharge control system according to the present disclosure, the slave device 21 may update the charge / discharge power command value by adding the product of the total value of the supply power indicated by the first command information and the priority of the facility FC to the charge / discharge power command value. This makes it possible to suppress an increase in the calculation load of the master device 11 that manages the facility FC, even when the number of facility FCs increases, and also to suppress an increase in the communication load between the master device 11 and the slave devices 21 included in the facility FC. In addition, charge / discharge control in the charge / discharge control element 25 included in the facility FC can be performed based on the overall power status of the multiple facility FCs.

[0066] Furthermore, in the charge / discharge control method and charge / discharge control system according to the present disclosure, the slave device 21 may update the charge / discharge power command value by adding the larger value of the supply power of the facility FC associated with the slave device 21 and the product of the priority and the total value of the supply power indicated by the first command information to the charge / discharge power command value. This makes it possible to promote power consumption within the facility FC associated with the slave device 21 when there is surplus power in the facility FC associated with the slave device 21. In particular, even when there is a shortage of power supply across multiple facility FCs, it is possible to reduce the amount of power sent from a facility FC with surplus power to a facility FC with a power shortage. As a result, it is possible to reduce the cost associated with power sending.

[0067] In addition, if there is a shortage of power in the facility FC associated with the slave device 21 and there is excess power supplied across the multiple facility FCs, the excess power supplied across the multiple facility FCs can be received and utilized by the facility FC associated with the slave device 21.

[0068] Furthermore, when there is a power shortage in the facility FC related to the slave device 21 and the supply power of the multiple facilities FC as a whole is insufficient, the charge / discharge power command value can be lowered to reduce the power required by the charge / discharge control element 25. As a result, the power system PS can reduce the power received from facilities outside the management of the charge / discharge control system, thereby reducing costs.

[0069] Furthermore, in the charge / discharge control method and charge / discharge control system according to the present disclosure, the slave device may acquire a time limit within which charging of a charging element requiring charging, among the charge / discharge control elements provided in the facility associated with the slave device, must be completed, and determine whether charging of the charging element can be completed before the time limit expires using the power supplied by the facility associated with the slave device. If it is determined that charging can be completed, the slave device may update the charge / discharge power command value by adding the smaller value of the power supplied by the facility associated with the slave device and the product of the priority and the sum of the power supplied by the facility associated with the slave device and the first command information. If it is determined that charging cannot be completed, the slave device may update the charge / discharge power command value by adding the larger value of the power supplied by the facility associated with the slave device and the product of the priority and the sum of the power supplied by the facility associated with the slave device and the first command information.

[0070] As a result, when there is excess power in the facility FC associated with the slave device 21 and there is a power supply shortage across multiple facilities FC, power can be lent from the facility FC with excess power to the facility FC with a power shortage. Since there is no need to rush to charge the charging elements, the use of power in the facility FC with a power shortage can be promoted, with priority given to charging the charging elements.

[0071] Furthermore, when there is a power shortage in the facility FC associated with the slave 21 and there is a surplus of power supplied across multiple facilities FCs, it is possible to reduce the amount of power being sent from the facility FC with the surplus power to the facility FC with the power shortage. This also reduces the cost of sending power. Because there is no need to rush to charge the charging elements, it is possible to reduce the amount of power being sent from the facility FC with the surplus power to the facility FC with the power shortage, thereby reducing the cost of sending power.

[0072] Furthermore, when there is excess power in the facility FC associated with the slave device 21 and charging of the charging element needs to be expedited, it is possible to promote power consumption within the facility FC associated with the slave device 21. In particular, even when there is a shortage of power supply across multiple facility FCs, it is possible to reduce the amount of power sent from a facility FC with excess power to a facility FC with a power shortage, thereby reducing the possibility that charging of the charging element will not be completed before the time limit has elapsed. It is also possible to reduce the cost associated with power sending.

[0073] Furthermore, when there is a power shortage in the facility FC associated with the slave device 21 and charging of the charging element needs to be rushed, the excess supply power from all of the multiple facility FCs can be received by the facility FC associated with the slave device 21 and used to charge the charging element. As a result, it is possible to reduce the possibility that charging of the charging element will not be completed before the time limit has elapsed.

[0074] Furthermore, in the charge / discharge control method and charge / discharge control system according to the present disclosure, the charging element may be an electric vehicle parked at a facility, and the slave device may acquire the time limit based on the scheduled time for the electric vehicle to depart from the facility. This allows for flexible control of charge / discharge power based on the scheduled time for the electric vehicle to depart from the facility. While ensuring that charging of the electric vehicle is completed while the electric vehicle is parked at the facility, it is possible to control charge / discharge power in accordance with the supply and demand of power at the facility where the electric vehicle is parked and at other facilities.

[0075] In the charge / discharge control method and charge / discharge control system according to the present disclosure, the slave units may transmit request information indicating required power requested by the charge / discharge control elements to the master unit. The master unit may receive the request information for each slave unit, generate second command information indicating a total value of required power for all the slave units based on the request information, and transmit the second command information to the slave units. The slave units may receive the second command information and set priorities based on a ratio of the required power to the total value of required power indicated by the second command information.

[0076] This allows the amount of power required by the charge / discharge control elements installed in the facility FC to be reflected in the control of charge / discharge power, making it possible to more flexibly control charge / discharge power according to the supply and demand of power.

[0077] Each function described in the above embodiments may be implemented by one or more processing circuits, including programmed processors, electrical circuits, and even devices such as application specific integrated circuits (ASICs), circuit components arranged to perform the described functions.

[0078] Although several embodiments have been described, the embodiments can be modified or varied based on the above disclosure. All components of the above embodiments and all features described in the claims may be individually extracted and combined, unless they are mutually inconsistent. [Explanation of symbols]

[0079] 11 Base unit 21 Handset 22 Power meter 23 Load Factors 24 Power generation elements 25 Charge / discharge control element FC facilities PS Power System

Claims

1. A charge / discharge control method for a power system in which power is shared among a plurality of facilities, the charge / discharge control method being related to a slave unit installed in each of the facilities and a master unit connected to a plurality of the slave units, the charge / discharge control method comprising: The slave unit is transmits power information to the parent device, the power information indicating the supply power, the direction of which is positive from the facility toward the power system; The parent device is receiving the power information for each of the slave devices; generating first command information indicating a total value of the power supply to the slave devices based on the power information; transmitting the first command information to the slave device; The slave unit is receiving the first command information; calculating a charge / discharge power command value for one or more charge / discharge control elements provided in the facility based on the first command information and the priority of the facility related to the slave device; controlling the charge / discharge control element based on the charge / discharge power command value; Charge and discharge control method.

2. The slave unit is updating the charge / discharge power command value by adding the product of the total value of the supply power indicated by the first command information and the priority to the charge / discharge power command value; The charge / discharge control method according to claim 1 .

3. The slave unit is The power supply of the facility related to the slave device, and the product of the total value of the supply power indicated by the first command information and the priority and updating the charge / discharge power command value by adding the larger value of The charge / discharge control method according to claim 1 .

4. The slave unit is acquire a time limit for completing charging of a charging element that requires charging among the charge / discharge control elements provided in the facility related to the slave device; determining whether or not the charging of the charging element can be completed by the time limit using the power supplied from the facility related to the slave device; If it is determined that it can be completed, The power supply of the facility related to the slave device, and the product of the total value of the supply power indicated by the first command information and the priority the smaller value of the above to the charge / discharge power command value to update the charge / discharge power command value; If it is determined that you cannot complete the The power supply of the facility related to the slave device, and the product of the total value of the supply power indicated by the first command information and the priority and updating the charge / discharge power command value by adding the larger value of The charge / discharge control method according to claim 1 .

5. the charging element is an electric vehicle parked at the facility, The slave unit is acquiring the time limit based on a scheduled time when the electric vehicle will depart from the facility; The charge / discharge control method according to claim 4.

6. The slave unit is transmitting request information indicating a required power required by the charge / discharge control element to the parent device; The parent device is receiving the request information for each of the slave devices; generating second command information indicating a total value of the requested power across the slave devices based on the requested information; transmitting the second command information to the slave device; The slave unit is receiving the second command information; setting the priority based on a ratio of the requested power to the total value of the requested power indicated by the second command information; The charge / discharge control method according to any one of claims 1 to 5.

7. In an electric power system in which electric power is shared among a plurality of facilities, a charge / discharge control system is provided which includes a slave unit installed in each of the facilities and a master unit connected to the plurality of slave units, The slave unit is transmits power information to the parent device, the power information indicating the supply power, the direction of which is positive from the facility toward the power system; The parent device is receiving the power information for each of the slave devices; generating first command information indicating a total value of the power supply to the slave devices based on the power information; transmitting the first command information to the slave device; The slave unit is receiving the first command information; calculating a charge / discharge power command value for one or more charge / discharge control elements provided in the facility based on the first command information and the priority of the facility related to the slave device; controlling the charge / discharge control element based on the charge / discharge power command value; Charge and discharge control system.

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