Power management system and power management method

Abstract

It is desirable that the amount of charging of an electric vehicle can be adjusted when a predicted value of the amount of charging of the electric vehicle that can be reached by the end of a chargeable period is smaller than a target amount of charging. A power management system (1) manages power supply to an electric vehicle (3). When the electric vehicle (3) is connected to a building (98), a control unit certifies a chargeable period of the electric vehicle (3) on the basis of information regarding operation of the electric vehicle (3). On the basis of a power consumption limit of the building (98), the chargeable period, and power consumption within the building (98), The control unit calculates a predicted value of the amount of charging of the electric vehicle (3) that can be reached by the end of the chargeable period. If the predicted value is smaller than a target amount of charging, the control unit adjusts the amount of charging of the electric vehicle (3) by limiting the power consumption within the building (98) so that the amount of charging of the electric vehicle (3) at the end of the chargeable period is equal to or greater than the target amount of charging.

Claims

1. A power management system (1) for managing the supply of power to an electric vehicle (3) installed in a building (98), comprising a control unit (29), wherein, when the electric vehicle is connected to the building, the control unit acquires first operational information (D1) relating to the operation of the electric vehicle and a target charge amount (D3) for the electric vehicle; determines the time when the electric vehicle can be charged based on the first operational information; calculates a predicted value of the charge amount of the electric vehicle that can be reached by a first time of the time when it can be charged based on the power consumption limit in the building, the time when it can be charged and the power consumption inside the building; and, if the predicted value is smaller than the target charge amount, adjusts the amount of charge to the electric vehicle by limiting the power consumption inside the building so that the charge amount of the electric vehicle at the first time of the time when it can be charged is equal to or greater than the target charge amount.

2. The power management system (1) according to claim 1, wherein the control unit limits the power consumption within the building by limiting the boiling operation of the hot water supply system (4) installed in the building, or by limiting the operation of the air conditioner (5) installed in the building.

3. The control unit calculates a plurality of combinations consisting of the amount of hot water stored in the hot water storage tank of the hot water supply unit at the first time of the charging period when the boiling operation of the hot water supply unit is restricted, and the amount of charge of the electric vehicle at the first time of the charging period, or calculates a plurality of combinations consisting of the set temperature of the air conditioner at the charging period when the operation of the air conditioner is restricted, and the amount of charge of the electric vehicle at the first time of the charging period, and determines a specific combination from among the plurality of combinations, the power management system (1) according to claim 2.

4. The power management system (1) according to claim 3, wherein the control unit displays the plurality of combinations on a display unit (23) and determines the combination selected using the input unit (22) as the specific combination.

5. The control unit determines a combination consisting of the amount of hot water stored in the hot water storage tank of the hot water supply device at the first time of the rechargeable period and the amount of charge of the electric vehicle at the first time of the rechargeable period, when the boiling operation of the hot water supply device is restricted, based on the amount of hot water stored in the hot water storage tank of the hot water supply device at the first time of the rechargeable period and the amount of charge of the electric vehicle at the first time of the rechargeable period, or determines a combination consisting of the set temperature of the air conditioner at the rechargeable period and the amount of charge of the electric vehicle at the first time of the rechargeable period, when the operation of the air conditioner is restricted, based on the set temperature of the air conditioner at the rechargeable period and the amount of charge of the electric vehicle at the first time of the rechargeable period, according to claim 2 (1).

6. The control unit determines a combination consisting of the amount of hot water stored in the hot water storage tank of the hot water supply system and the amount of charge of the electric vehicle at the first time of the charging period, when the boiling operation of the hot water supply system is restricted, based on a priority set between the amount of hot water stored in the hot water storage tank of the hot water supply system and the amount of charge of the electric vehicle at the first time of the charging period, or determines a combination consisting of the set temperature of the air conditioner and the amount of charge of the electric vehicle at the first time of the charging period, when the operation of the air conditioner is restricted, based on a priority set between the set temperature of the air conditioner and the amount of charge of the electric vehicle, according to claim 2 (1).

7. The power management system (1) according to any one of claims 1 to 6, wherein the first operational information includes a second time which is the scheduled time when the electric vehicle departs the building, and the control unit acquires the time when the electric vehicle will depart the building predicted based on past actual departure time information of the electric vehicle as the second time, acquires the scheduled time when the electric vehicle will depart the building input using the input unit (22) as the second time, or acquires the scheduled time when the electric vehicle will depart the building based on the operational schedule of the electric vehicle as the second time.

8. A power management method for managing the supply of power to an electric vehicle (3) installed in a building (98) performed by a computer (1), wherein the computer comprises a control unit (29), and the control unit, when the electric vehicle is connected to the building, acquires first operational information (D1) relating to the operation of the electric vehicle and a target charge amount (D3) for the electric vehicle; determines the time when the electric vehicle can be charged based on the first operational information; calculates a predicted value of the charge amount of the electric vehicle that can be reached by a first time of the time when it can be charged based on the power consumption limit in the building, the time when it can be charged and the power consumption inside the building; and if the predicted value is smaller than the target charge amount, adjusts the amount of charge to the electric vehicle by limiting the power consumption inside the building so that the charge amount of the electric vehicle at the first time of the time when it can be charged is equal to or greater than the target charge amount.

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