JP6565086B2 - Charging equipment management device - Google Patents

Description

The present invention relates to a charging equipment management device.

There is a power distribution system capable of charging a storage battery included in an electric vehicle with generated power generated by a solar power generation system and purchased power purchased from a commercial power source (see, for example, Patent Document 1).
If there is a load that requires a large amount of power in a short time, a peak of power demand occurs in the commercial power supply system, and thus smoothing of power demand (peak cut) is required. As a solution to this problem, the power generated by a photovoltaic power generation system or generator and the purchased power during a time period when the power demand is small are stored in the stationary storage battery, and the stationary storage battery is stored during the time when the power demand increases. It is known to use discharge power (for example, refer to Patent Document 2).
In addition, the charger is subject to demand response, and there is a case where reduction of power consumption is required in a predetermined time zone, and as a means for operating a certain load when the purchased power is reduced, a stationary battery is used. It is known to use discharge power.

  In recent years, rapid charging of electric vehicles has attracted attention. At the time of rapid charging, since it is necessary to charge a storage battery provided in the electric vehicle with a relatively short charging time, the power supplied to the electric vehicle is increased as compared with low-speed charging. For this reason, when realizing quick charge, it is desirable that sufficient electric power is stored in the stationary storage battery.

JP 2013-81290 A International Publication No. 2011-162025

  However, power generated by natural energy such as solar power generation is unstable, and there is a possibility that sufficient power may not be charged in the stationary storage battery depending on weather conditions. In this case, there may arise a problem that peak cut, response to demand response, and quick charge cannot be performed as described above. In addition, when charging stationary storage batteries not only with solar power generation but also with purchased power from commercial power sources, the stationary storage battery is already fully charged when charging the generated power generated by solar power generation, There is a possibility that the generated power cannot be stored. Thus, when charging a stationary storage battery by combining generated power such as photovoltaic power generation and purchased power, it is difficult to optimize the amount of purchased power purchased from a commercial power source.

The present invention has been made in view of such circumstances, and its object is to provide a charging facility management device Ru can be suppressed purchased electric power amount of the power receiving from the commercial power source.

According to one aspect of the present invention, a charging facility management apparatus includes a generator, a stationary storage battery, generated power from the generator, purchased power from a commercial power source, and supply of discharged power from the stationary storage battery. In a charging facility management apparatus that manages a charging facility that includes a charger that can charge a vehicle in response to a power supply, a power supply amount prediction unit that predicts a power supply amount that can be supplied from the charger, and the generator can generate power A power generation predicting unit that predicts the amount of generated power, and the charger when the generator is used based on the power supply amount predicted by the power supply power prediction unit and the power generation amount predicted by the power generation prediction unit Determining the upper limit value of the purchased power required for the commercial power source to charge the stationary storage battery when the vehicle is not supplied with power based on the insufficient power amount. A power upper limit determination unit; Provided.

Moreover, according to one aspect of the present invention, the charging facility management device controls the vehicle to charge the generated power with priority.

Further, according to one aspect of the present invention, in the charging facility management device, when the generated power is insufficient to charge the vehicle, the purchased power is preferentially charged to the vehicle. To control.

Moreover, according to one aspect of the present invention, in the charging facility management apparatus, when the vehicle is insufficiently charged with the generated power and the purchased power, the generated power and the purchased power are In addition, control is performed so that the vehicle is charged with the discharged power.

Moreover, according to one aspect of the present invention, in the charging facility management device, the generated power or the purchased power is supplied as power to be charged to the vehicle with priority, and the generated power or the purchased power is When charging to the vehicle is insufficient, control is performed so that the discharged power is charged to the vehicle in preference to the generated power or the purchased power in addition to the generated power or the purchased power.

  According to the present invention, it is possible to suppress the amount of purchased power received from a commercial power source.

It is the schematic which shows an example of the charging equipment management system which concerns on one Embodiment of this invention. It is a block diagram which shows the connection relation of the electric power grid | system of the charging equipment management system which concerns on one Embodiment of this invention. It is a block diagram which shows the structural example of the charging equipment management apparatus which concerns on one Embodiment of this invention. It is a flowchart for demonstrating an example of the setting process of the power purchase upper limit which concerns on one Embodiment of this invention.

Hereinafter, an example of the charging equipment management system 1 which concerns on one Embodiment of this invention is shown. FIG. 1 is a schematic diagram illustrating an example of a charging facility management system 1 according to an embodiment of the present invention.
As shown in FIG. 1, the charging facility management system 1 includes a charging facility management device 100, a solar power generation system (generator) 200, and a commercial power supply that are connected via a power line or a communication line (for example, LAN). A power supply 300, a stationary storage battery 400, and a plurality of chargers 500 are provided. The charging facility management apparatus 100 is connected to the power management apparatus 600, the electric vehicle management apparatus 700, and the information providing apparatus 800 via the Internet or the like. In the present embodiment, the “charging facility” includes a solar power generation system 200, a commercial power source 300, a stationary storage battery 400, and a charger 500.

  The charging facility management apparatus 100 controls the charging facility in an integrated manner. The charging facility management device 100 may be a single device or may be mounted in the charger 500. The charging facility management apparatus 100 may be an external server connected to each charging facility via the Internet.

  The solar power generation system 200 includes a storage battery cell that converts solar light into electric power using, for example, a solar battery and charges the converted generated electric power. The solar power generation system 200 is an example of a power generation system using natural energy, and the present invention is not limited to this, and may be a wind power generation system.

The commercial power supply 300 is a power source provided by an electric power company such as an electric power company.
The stationary storage battery 400 includes a storage battery cell that is charged by the generated power from the solar power generation system 200 and the purchased power from the commercial power source 300 and supplies the discharged power to the charger 500.
The charger 500 is a plurality of chargers installed at a certain charging station. A plurality of chargers 500 are set in the charging station. In the present embodiment, the plurality of chargers 500 include the chargers 501 to 510, but the number of the chargers 500 is not limited to ten and may be one. However, the present invention is not limited to this, and the charger 500 may be installed at the user's home.

  The power management apparatus 600 is, for example, a CEMS (community energy management system), a BEMS (building energy management system), or the like, and distributes a request corresponding to a demand response. For example, the power management apparatus 600 distributes information representing the power upper limit value every 30 minutes in the target area to the charging facility management apparatus 100 via the Internet. Demand response means that electric utilities set charges for different time zones (or hours), and demands are set to be low, when demand is high and high charges are set at high prices. It is a framework that encourages demand shift at low load.

The electric vehicle management apparatus 700 receives information on the usage status of the charger 500 from the charger 500 and stores the information for each user, for example.
In addition, the electric vehicle management apparatus 700 performs wireless communication with the vehicle-mounted devices 901 to 904 installed in the vehicle, and acquires information indicating the remaining battery level of the vehicle-mounted storage battery included in the vehicle and information indicating the current position of the vehicle. To do. The electric vehicle management apparatus 700 stores the acquired information for each user (or for each vehicle-mounted device).
For example, the electric vehicle management apparatus 700 periodically transmits stored information to the charging facility management apparatus 100 via the Internet.

  The information providing apparatus 800 collects weather information related to weather such as sunshine hours and temperature for each region, for example. For example, the information providing apparatus 800 periodically transmits the stored information to the charging facility management apparatus 100 via the Internet.

Next, with reference to FIG. 2, the connection relation of the electric power system in the charging equipment management system 1 which concerns on one Embodiment of this invention is demonstrated. FIG. 2 is a block diagram showing the connection relation of the power system of the charging facility management system 1 according to the embodiment of the present invention.
Solar power generation system 200, commercial power supply 300, stationary storage battery 400, and charger 500 are connected to DC bus 1000.

The solar power generation system 200 is connected to the direct current bus 1000 via the DC / DC conversion circuit 250. The DC / DC conversion circuit 250 includes a generated power control circuit 251 and a power circuit 252. In the generated power control circuit 251, a generator setting voltage V _PV is set. Generated power control circuit 251 always monitors the voltage of the DC bus 1000, and compares the magnitude relation between the voltage of the DC bus 1000 and the generator set voltage V _PV. When the generated power control circuit 251 determines that the voltage of the DC bus 1000 is lower than the generator setting voltage V _PV , the generated power control circuit 251 controls the power circuit 252 to supply the generated power of the photovoltaic power generation system 200 to the DC bus 1000. . When the generated power control circuit 251 instructs the power circuit 252 to supply power to the DC bus 1000, the power circuit 252 transforms the voltage of the generated power of the photovoltaic power generation system 200 into the generator set voltage V _PV (DC / DC conversion). ) And supply to the DC bus 1000.
In addition, when the generated power is supplied to the DC bus 1000, the generated power control circuit 251 transmits information indicating that the generated power is supplied to the charging facility management apparatus 100.

The commercial power supply 300 is connected to the DC bus 1000 via the AC / DC conversion circuit 350. The AC / DC conversion circuit 350 includes a purchased power control circuit 351 and a power circuit 352. In the purchased power control circuit 351, a commercial power set voltage _VAC is set. Purchased electric power control circuit 351 always monitors the voltage of the DC bus 1000, and compares the magnitude relation between the voltage and the commercial power supply set voltage V _AC DC bus 1000. Purchased electric power control circuit 351 has determined that the voltage of the DC bus 1000 is below the set voltage V _AC commercial power, controlling the power circuit 352 to power the power purchase power from the commercial power supply 300 to the DC bus 1000 To do. The power circuit 352 converts the purchased power from the commercial power supply 300 from direct current to alternating current and supplies it to the direct current bus 1000 when the purchased power control circuit 351 instructs to supply power to the direct current bus 1000. .
In addition, when the purchased power control circuit 351 supplies the purchased power to the DC bus 1000, the purchased power control circuit 351 transmits information indicating that the purchased power is supplied to the charging facility management apparatus 100.

The stationary storage battery 400 is connected to the direct current bus 1000 via the DC / DC conversion circuit 450. The DC / DC conversion circuit 450 includes a charge / discharge power control circuit 451 and a power circuit 452. The charge / discharge power control circuit 451 is set with a storage battery setting voltage V _LiB . The charge / discharge power control circuit 451 constantly monitors the voltage of the DC bus 1000, and compares the magnitude relationship between the voltage of the DC bus 1000 and the set voltage V _LiB for the storage battery. When the purchased power control circuit 351 determines that the voltage of the DC bus 1000 is lower than the storage battery setting voltage V _LiB , the purchased power control circuit 351 controls the power circuit 452 to supply the discharge power from the stationary storage battery 400 to the DC bus 1000. To do. When the charge / discharge power control circuit 451 instructs the power circuit 452 to supply power to the DC bus 1000, the power circuit 452 transforms the voltage of the discharge power from the stationary storage battery 400 into the storage battery setting voltage V _LiB (DC / DC conversion). ) And supply to the DC bus 1000.
In addition, when charging power is supplied to the DC bus 1000, the charging / discharging power control circuit 451 transmits information indicating that the discharging power is supplied to the charging facility management apparatus 100.

The charger 500 is connected to the DC bus 1000 via the DC / DC conversion circuit 550. The DC / DC conversion circuit 550 includes a charging power control circuit 551 and a power circuit 552. In the charging power control circuit 551, a range of the charging output value _PQC is set. The user of the charger 500 can select the charging output value _PQC within the set range.
The charging power control circuit 551 controls the power circuit 552 to supply the power of the selected charging output value _PQC from the DC bus 1000 to the vehicle storage battery of the vehicle. In the present embodiment, the range of the charging output value P _QC is set as the minimum value P _low <P _QC ≦ (minimum value P _low + dischargeable power value P _Bout ). The dischargeable power value P _Bout is calculated by the charging facility management apparatus 100 based on the remaining amount of charge of the stationary storage battery 400 before the vehicle starts charging from the charger 500. When (minimum value P _low + dischargeable power value P _Bout ) exceeds the maximum value of the rated output of charger 500, charging power control circuit 551 determines the range of charging output value P _QC as minimum value P _low. <P _QC ≦ (maximum value of rated output of charger 500).
When the charging power control circuit 551 receives charging power from the DC bus 1000, the charging power control circuit 551 transmits information indicating that charging power has been supplied to the charging facility management apparatus 100.

  The charging facility management device 100 is communicably connected to a generated power control circuit 251, a purchased power control circuit 351, a charge / discharge power control circuit 451, a charge power control circuit 551, and a storage battery state monitoring device 430. Yes. The generated power control circuit 251, the purchased power control circuit 351, the charge / discharge power control circuit 451, and the charge power control circuit 551 are information indicating that power is supplied to the DC bus 1000 or supply of power from the DC bus 1000. Information indicating that it has been received is transmitted to the charging facility management apparatus 100. The storage battery state monitoring device 430 constantly monitors the remaining amount of electricity stored in the stationary storage battery 400 and transmits information indicating the remaining amount of electricity stored to the charging facility management device 100.

Next, processing examples of the generated power control circuit 251, the purchased power control circuit 351, and the charge / discharge power control circuit 451 will be described.
In the present embodiment, priority may be determined for the power supplied to the vehicle connected to the charger 500. As the power supply priority, it is determined that the generated power from the photovoltaic power generation system 200 is No. 1, the purchased power from the commercial power supply 300 is No. 2, and the discharged power from the stationary storage battery 400 is No. 3. In order to realize this, it is determined that the generator set voltage V _PV > commercial power set voltage V _AC > storage battery set voltage V _LiB . In addition, the upper limit value P <b> 1 of purchased power from the commercial power source 300 is determined in advance by the charging facility management apparatus 100. The upper limit value P2 of the generated power from the solar power generation system 200 is determined by the output rating of the solar power generation system 200. In order to realize this, the charging facility management apparatus 100 supplies the set voltage V _LiB for the storage battery from the commercial power supply 300 to the DC bus 1000 with the purchased power having the upper limit value P1, and the upper limit value from the photovoltaic power generation system 200. The voltage value of the DC bus 1000 in a state where the generated power of P2 is supplied to the DC bus 1000 is set. Further, the charging facility management device 100 sets the commercial power set voltage _VAC to the voltage value of the DC bus 1000 in a state where the generated power of the upper limit value P2 is supplied from the solar power generation system 200 to the DC bus 1000. .

When the charger 500 is connected to the on-vehicle charging circuit of the vehicle, the voltage of the DC bus 1000 is lower than the generator set voltage V _PV . The generated power control circuit 251 is configured to supply the generated power from the photovoltaic power generation system 200 to the DC bus 1000 when it is determined that the voltage of the DC bus 1000 is lower than the generator set voltage V _PV. 252 is controlled. As a result, the charging power control circuit 551 charges the generated battery from the photovoltaic power generation system 200 supplied to the DC bus 1000 from the charger 500 to the storage battery of the vehicle.

If the charging of the vehicle-vehicle battery is insufficient in power generation, the voltage of the DC bus 1000 is further lowered, below the set voltage V _AC commercial power supply. Purchased electric power control circuit 351, when the voltage of the DC bus 1000 is judged that falls below the set voltage V _AC commercial power supply, to supply power purchase power from the commercial power supply 300 to the DC bus 1000, a power circuit 352 is controlled. As a result, the charging power control circuit 551 causes the battery 500 to charge the storage battery of the vehicle with the generated power from the solar power generation system 200 supplied to the DC bus 1000 and the amount of power purchased from the commercial power supply 300.

When charging of the on-vehicle storage battery of the vehicle is insufficient for the generated power and the purchased power, the voltage of the DC bus 1000 _drops and falls below the set voltage V _LiB for the storage battery. When it is determined that the voltage of the DC bus 1000 is lower than the set voltage V _LiB for the storage battery, the charge / discharge power control circuit 451 supplies the power circuit 452 to supply the discharge power from the stationary storage battery 400 to the DC bus 1000. To control. Thus, the charging power control circuit 551 uses the generated power from the photovoltaic power generation system 200 supplied to the DC bus 1000, the purchased power from the commercial power source 300, and the discharged power from the stationary storage battery 400 to the charger 500. To charge the vehicle storage battery.

When the in-vehicle storage battery of the vehicle approaches full charge, the voltage of the DC bus 1000 increases and reaches the storage battery setting voltage V _LiB . When the voltage of the DC bus 1000 reaches the storage battery setting voltage V _LiB , the charge / discharge power control circuit 451 stops the discharge from the stationary storage battery 400 and charges the stationary storage battery 400 with the power from the DC bus 1000. The power circuit 452 is controlled. As a result, the generated power from the solar power generation system 200 and the amount of power purchased from the commercial power supply 300 are charged to the stationary storage battery 400 from the DC bus 1000.

When the charge amount of the stationary storage battery 400 is less than a predetermined threshold value, the charge / discharge power control circuit 451 combines the generated power from the solar power generation system 200 and the purchased power from the commercial power supply 300, and sets the stationary power storage battery 400. It controls so that the type | mold storage battery 400 may be charged. When the charge amount of the stationary storage battery 400 is equal to or greater than the threshold value, the charge / discharge power control circuit 451 controls to charge the stationary storage battery 400 only with the generated power from the solar power generation system 200. For example, when the charge amount of the stationary storage battery 400 is less than the threshold value, the charge / discharge power control circuit 451 charges the stationary storage battery 400 so that the voltage of the DC bus 1000 maintains the storage battery setting voltage V _LiB. Adjust. Moreover, charge-discharge electric power control circuit 451, for example, when the charge amount of the stationary storage battery 400 is equal to or greater than the threshold, so that the voltage of the DC bus 1000 to maintain a set voltage V _AC commercial power source, to the stationary storage battery 400 Adjust the charging power.

In the present embodiment, when the upper limit value P1 of the purchased power is changed by the charging facility management device 100, the charge / discharge power control circuit 451 changes the set upper limit value P1 for the storage battery to the set voltage V _LiB for the storage battery. Change according to. That is, the charge / discharge power control circuit 451 is supplied with the purchased power at the upper limit P1 after the change to the DC bus 1000, and the generated power at the upper limit P2 is supplied from the solar power generation system 200 to the DC bus 1000. In this state, the voltage value of the DC bus 1000 is set to the storage battery setting voltage V _LiB .

  Next, with reference to FIG. 3, the structural example of the charging equipment management apparatus 100 which concerns on one Embodiment of this invention is demonstrated. FIG. 3 is a block diagram illustrating a configuration example of the charging facility management apparatus 100 according to an embodiment of the present invention.

The charging facility management apparatus 100 includes a communication unit 11, a calculation unit 12 such as a CPU (Central Processing Unit), a storage unit 13, and an operation unit 14.
The communication unit 11 communicates information between the photovoltaic power generation system 200, the AC / DC conversion circuit linked with the commercial power supply 300, the storage battery state monitoring device of the stationary storage battery 400, and the charger 500 via the LAN. Send and receive. In addition, the communication unit 11 receives information transmitted from the power management apparatus 600, the electric vehicle management apparatus 700, and the information providing apparatus 800 via the Internet.

  The calculation unit 12 is a control unit that controls information processing performed by the charging facility management apparatus 100, and includes a use prediction unit 101, a power supply amount prediction unit 102, a power generation prediction unit 103, and a power purchase upper limit determination unit 104. The supplementary value calculation unit 105, the charge control unit 106, the power supply start determination unit 107, the discharge power calculation unit 108, the power supply range determination unit 109, and the charge amount correction unit 110 are provided.

The storage unit 13 includes a minimum value P _low 131 of purchased power, a P _max 132 of purchased power, a predicted period setting value 133, vehicle remaining charge information 134, vehicle position information 135, and predicted feed power. The amount Q _exp 136 and the predicted power generation amount P _PV 137 are stored.
The minimum power purchase value P _low 131 is a minimum guaranteed power purchase value set by the power purchase upper limit determination unit 104 in accordance with the charger 500. The minimum guaranteed value of the purchased power of the charger 500 is the minimum amount of electricity required when the minimum amount of power output from the charger 500 is supplied only by the purchased power.
The power purchase power P _max 132 is a threshold value contractually determined as an upper limit value for switching the power purchase power, or the maximum value of the power purchase power within a forecast period determined according to a request corresponding to the demand response. It is.

The prediction period setting value 133 is information indicating the currently set prediction period. The prediction period setting value 133 is updated every time the prediction period is changed.
The remaining vehicle charge information 134 is information obtained by the electric vehicle management apparatus 700 and indicating the remaining battery level of the in-vehicle storage battery included in the vehicle. The vehicle charge remaining amount information 134 stores information indicating the battery remaining amount of the in-vehicle storage battery in association with each vehicle (on-vehicle device).
The vehicle position information 135 is information indicating the current position of the vehicle acquired by the electric vehicle management apparatus 700. The vehicle position information 135 stores information indicating the current position of the vehicle in association with each vehicle (on-vehicle device).

The predicted power supply amount Q _exp 136 is the predicted power supply amount Q _exp obtained by the power supply power amount prediction unit 102. The predicted power supply amount Q _exp 136 is updated every time the predicted power supply amount Q _exp is changed.
The predicted power generation amount P _PV 137 is the predicted power generation amount P _PV obtained by the power generation prediction unit 103. The predicted power generation amount P _PV 137 is updated every time the predicted power generation amount P _PV is changed.

  The usage prediction unit 101 acquires a usage number predicted value indicating a predicted value of the number of vehicles predicted to use the charger 500 within the determined prediction period.

  The supplied power amount prediction unit 102 predicts the amount of supplied power supplied from the charger 500 to the vehicle within the prediction period based on the predicted number of used units acquired by the use prediction unit 101. When the supplementary value calculation unit 105 obtains the supplementary value, the power supply power amount prediction unit 102 predicts the power supply power amount based on a value obtained by supplementing the use number prediction value acquired by the use prediction unit 101 with the supplementary value. May be.

  The power generation prediction unit 103 predicts the amount of power that can be generated by the solar power generation system 200 within the prediction period based on weather information acquired from the information providing apparatus 800. The power generation prediction unit 103 predicts the amount of power that can be generated by the solar power generation system 200 based on the measurement result of a sensor (a solar radiation meter, a thermometer, an anemometer, etc.) attached to the solar power generation system 200. Also good.

Based on the prediction result predicted by the power supply power amount prediction unit 102 and the prediction result predicted by the power generation prediction unit 103, the power purchase upper limit determination unit 104 serves as power supply power supplied to the vehicle from the charger 500 within the prediction period. The amount of power shortage that is insufficient when the predicted generated power is used is obtained. The power purchase upper limit determination unit 104 determines an upper limit value P _{BC of the} power purchase required for the commercial power supply 300 within the prediction period based on the power that can charge the stationary storage battery 400 with the insufficient power amount within the prediction period. . Then, setting the charge control unit 106, the upper limit value P _BC of purchased power limit value determination unit 104 has determined power purchase power, the upper limit value P1 of the period the charger 500 is not supplying power to the vehicle, power purchase power To do.

The power purchase upper limit determination unit 104 determines the power purchase power within a forecast period determined according to a threshold value determined in the contract as an upper limit value at which the charge of the purchased power is switched or a request corresponding to the demand response. than the maximum value, if the upper limit value P _BC of the determined power purchase power is high, a threshold or maximum value, may be added a condition that the upper limit value P1 power purchase power.

In addition, when the charger 500 supplies the purchased power or the discharged power to the vehicle within the prediction period, the power purchase upper limit determination unit 104 determines the previously obtained insufficient power amount based on the supplied power amount supplied to the vehicle. change, the amount of power that can be charged a shortage amount of power was changed to stationary storage battery 400 may be determined as the upper limit value P _BC power purchase power.

In addition, the power generation prediction unit 103 predicts the amount of power that can be generated by the photovoltaic power generation system 200 a plurality of times within the prediction period, and the power generation prediction unit 103 predicts that the amount of power that can be generated increases from the previous prediction result. In this case, the power purchase upper limit determination unit 104 changes the insufficient power amount obtained last time based on the current prediction result. Purchased power upper limit value determination unit 104, the amount of power that can be charged a shortage amount of power was changed to stationary storage battery 400 may be determined as the upper limit value P _BC power purchase power.

  The supplementary value calculation unit 105 obtains a supplementary value for supplementing the predicted number of used units acquired by the usage prediction unit 101 according to the usage status of the charger 500.

Charging control unit 106, the upper limit value P _BC of purchased power limit value determination unit 104 has determined purchased electric power, in a period where the charger 500 is not supplying power to the vehicle, power purchase power for charging the stationary storage battery 400 Set to value.

  The power supply start determination unit 107 receives information indicating that the purchased power is supplied to the DC bus 1000 from the commercial power supply 300 from the purchased power control circuit 351. In addition, the power supply start determination unit 107 receives information indicating that the discharge power is supplied from the stationary storage battery 400 to the DC bus 1000 from the charge / discharge power control circuit 451.

  When power supply is started from the charger 500 to the on-vehicle storage battery of the vehicle, the discharge power calculation unit 108 calculates the discharge power that can be supplied to the vehicle based on the remaining storage amount of the stationary storage battery 400. The discharge power calculation unit 108 receives information indicating the remaining power storage amount of the stationary storage battery 400 from the storage battery state monitoring device 430 via the communication unit 11.

  Based on the discharge power calculated by the discharge power calculation unit 108, the power supply range determination unit 109 determines a range of power supply power that the charger 500 can supply to the vehicle.

  The charge amount correction unit 110 corrects the remaining power storage amount of the stationary storage battery 400 calculated by the discharge power calculation unit 108 based on the usage period of the stationary storage battery 400.

  The operation unit 14 receives an operation from an operator who operates the charging facility management apparatus 100 and outputs information indicating the received operation content to the calculation unit 12.

  Next, an example of processing for setting the upper limit value P1 of purchased power by the charging facility management apparatus 100 according to an embodiment of the present invention will be described with reference to FIG. FIG. 4 is a flowchart for explaining an example of a setting process of the upper limit value P1 of purchased power according to an embodiment of the present invention.

(Step ST101)
The power purchase upper limit determination unit 104 reads the minimum value P _low 131 and the maximum value P _max 132 of the purchased power from the storage unit 13 and temporarily stores them in its own storage area.

(Step ST102)
The power purchase upper limit determination unit 104 sets a prediction period. For example, the power purchase upper limit determination unit 104 sets a period from the current time to a predetermined time T later as the prediction period. In the present embodiment, when the prediction period is 3 hours and the current time is 16:00, the power purchase upper limit determination unit 104 determines the period from 16:00 to 18:59 as the prediction period. The power purchase upper limit determination unit 104 writes and updates the determined prediction period in the storage unit 13 as the prediction period setting value 133.

(Step ST103)
When the prediction period setting value 133 is updated by the power purchase upper limit determination unit 104, the usage prediction unit 101 is predicted to use the charger 500 within the updated prediction period as the usage number prediction value. Get the number of units. The usage prediction unit 101 may receive the predicted usage number from the electric vehicle management apparatus 700, or may predict the number of vehicles that are likely to use the charger 500 by itself. In the former case, the electric vehicle management apparatus 700 predicts the number of vehicles that are likely to use the charger 500.

When predicting the number of vehicles, the usage prediction unit 101 (or the electric vehicle management device 700) uses the charger 500 within the prediction period based on the remaining charge of the vehicle that can use the charger 500 and the current position. Predict the number of vehicles likely to do. The “vehicle that can use the charger 500” is, for example, a rechargeable vehicle that may travel in an area where the charger 500 is installed. The usage prediction unit 101 may acquire the “remaining charge amount and current position of the vehicle” by requesting the electric vehicle management device 700 to transmit the vehicle, and the vehicle transmitted from the electric vehicle management device 700 in advance. The remaining charge information 134 and the vehicle position information 135 may be read from the storage unit 13 and acquired.
The usage prediction unit 101 acquires, for example, a predicted usage number indicating that the number of vehicles that are likely to use the charger 500 in the prediction period (16: 0 to 18:59) = 3.

(Step ST104)
The supplementary value calculation unit 105 obtains a supplementary value α for supplementing the predicted number of used units acquired by the usage prediction unit 101. The supplementary value α is determined in advance according to usage conditions of the charger 500, such as the time period or day of the prediction period, the regional characteristics in which the charger 500 is set, the past usage status of the charger 500, and the like. For example, the supplementary value calculation unit 105 refers to a usage condition table (not shown) in which a supplementary value α determined according to the usage condition is defined, and corresponds to the predicted number of units used in the prediction period. You may acquire supplementary value (alpha). Further, the supplementary value calculation unit 105 may calculate the supplementary value α based on the sum of coefficients weighted according to the usage condition. Further, the supplementary value calculation unit 105 may determine the supplementary value α based on the accuracy (variation) of the predicted value based on the past usage situation of the charger 500 and the past use number predicted value. The above-described usage condition table (not shown) may be updated with the supplementary value α.

The supplementary value calculation unit 105 obtains a supplementary value (α = + 2) that supplements that two vehicles further use the charger 500 in the prediction period (16: 0 to 18:59), for example.
Depending on the prediction period, the supplementary value α = 0, and supplementation may not be necessary.

(Step ST105)
The power supply amount prediction unit 102 supplies power to the vehicle from the charger 500 within the prediction period based on the total value of the predicted number of used units acquired by the usage prediction unit 101 and the supplementary value α obtained by the supplementary value calculation unit 105. Predict the amount of power supply. The prediction result predicted by the feed power amount prediction unit 102 is referred to as a predicted feed power amount Q _exp . In the prediction of the power supply amount prediction unit 102, the power generation priority from the photovoltaic power generation system 200 is No. 1, the power purchase power from the commercial power source 300 is No. 2, and the discharge power from the stationary storage battery 400 is It is decided to be number 3. Further, according to the prediction of the power supply power amount prediction unit 102, it is determined that the purchased power from the commercial power source 300 is the minimum guaranteed value P _low in preparation for a situation where the purchased power cannot be sufficiently purchased. That is, the power supply power prediction unit 102 predicts the power supply power supplied to the vehicle on the premise that only power having a minimum value P _low can be purchased as power purchased from the commercial power supply 300. Therefore, the power supply amount prediction unit 102, as the predicted power supply amount Q _exp , excludes purchased power that is directly supplied from the commercial power source 300 during power supply, and generated power that is directly supplied from the solar power generation system 200 during power supply, The total value of the discharge power supplied from stationary battery 400 is obtained. Furthermore, in the prediction of the power supply power amount prediction unit 102, the power supply power amount (necessary power supply amount) required per vehicle is prepared in preparation for a situation where power is supplied to a vehicle equipped with an in-vehicle storage battery having a large battery capacity. It is determined according to the battery capacity of the vehicle having the maximum battery capacity among the rechargeable vehicles used in the area where charger 500 is installed.

For example, a case will be described in which the minimum value P _low = 10 kW, which is the minimum guaranteed value of purchased power, and the maximum battery capacity is 30 kWh in the area where the charger 500 is installed.
Here, it is assumed that the vehicle receives power from the charger 500 for 28 minutes. In this case, the feed power amount prediction unit 102 calculates the predicted feed power amount Q _exp by calculating the following equation. Feeding power amount prediction unit 102, a predicted feed power amount _{Q exp} obtained, written in the predicted feed power amount _Q exp 136 of the storage unit 13.
<Predicted power supply amount Q _exp >
= Number of units used (5 units) x Required power supply per unit (12 kWh) x Charging time (0.5 h)
= 30kWh

(Step ST106)
The power generation prediction unit 103 predicts the amount of power that can be generated by the solar power generation system 200 within the prediction period based on, for example, weather information acquired from the information providing apparatus 800. The power generation prediction unit 103 predicts, for example, that the solar power generation system 200 can generate 9 kWh within the prediction period (16: 0 to 18:59). The prediction result predicted by the power generation prediction unit 103 is referred to as a predicted power generation amount P _PV . Generating prediction unit 103, the predicted power generation amount _{P PV} obtained, written in the predicted power generation amount _P PV 137 of the storage unit 13.

(Step ST107)
Purchased power upper limit value determination unit 104, based on the predicted power supply power amount Q _exp feeding power amount prediction unit 102 is a prediction result predicted, the predicted power generation amount P _PV is a prediction result of the power generation prediction unit 103 predicts Then, an insufficient power amount that is insufficient when the generated power predicted as the power supplied from the charger 500 to the vehicle within the prediction period is used. The power purchase upper limit determination unit 104 calculates, for example, the amount of insufficient power within the prediction period (16: 0 to 18:59) by calculating the following expression.
<Insufficient power consumption>
= Predicted power supply amount Q _exp (30 kWh) -Predicted power generation amount P _PV (9 kWh)
= 21kWh

The power purchase upper limit determination unit 104 determines the amount of power that can be charged to the stationary storage battery 400 within the prediction period as the power purchase upper limit value P _BC requested from the commercial power supply 300 within the prediction period. . The upper limit value _PBC of purchased power is the upper limit value of power purchased from the commercial power supply 300 during the period when the charger 500 is not supplying power to the vehicle. The power purchase upper limit determination unit 104 determines the amount of insufficient power per hour within the prediction period (16: 0 to 18:59), for example, by calculating the following formula, so that the stationary storage battery 400 an upper limit value P _BC of the purchased electric power during charging.
<Upper limit value P _BC of purchased power when charging the stationary storage battery 400>
= Insufficient power (21 kWh) / Predicted time (3 h)
= 7kW
The power purchase upper limit determination unit 104 outputs information indicating the determined upper limit _PBC to the charge control unit 106.

Here, the power purchase upper limit determination unit 104 determines the power purchase power within a prediction period determined according to a threshold value determined in a contract as an upper limit value at which the power purchase power charge is switched or a request corresponding to a demand response. than the maximum value of, if the upper limit value P _BC of the determined power purchase power is high, the upper limit value P1 power purchase power setting value set in the purchased electric power control circuit 351 of the commercial power source 300 to a threshold or maximum value the condition may be added to the information indicating the upper limit value P _BC power purchase power. For example, the power purchase upper limit determination unit 104 charges the information that the power purchase power upper limit P _BC = 7 kW (however, if P _BC ≧ P _max , the power purchase power upper limit P1 = P _max ). The data is output to the control unit 106.

(Step ST108)
The charging control unit 106 determines the power purchase power upper limit value P1 = P _BC [7 kW] determined by the power purchase upper limit value determination unit 104 (however, if P _BC ≧ P _max , the upper limit value of the power purchase power set value). (P1 = _Pmax ) is output to the charge / discharge power control circuit 451 via the communication unit 11 to instruct to set the upper limit value P1 of the purchased power set value. In other words, the charging control unit 106 supplies the set voltage V _LiB for the storage battery from the commercial power supply 300 to the DC bus 1000 with the purchased power having the upper limit value P1, and from the photovoltaic power generation system 200 to the generated power having the upper limit value P2. Is set to the voltage value of the DC bus 1000 in a state in which is supplied to the DC bus 1000.

(Step ST109)
The power purchase upper limit determination unit 104 determines whether or not purchased power or discharged power is supplied from the charger 500 to the vehicle. The power supply start determination unit 107 supplies information indicating that the purchased power is supplied from the commercial power source 300 to the DC bus 1000 from the purchased power control circuit 351 or the discharged power from the stationary storage battery 400 to the DC bus 1000. When the information indicating this is received from the charge / discharge power control circuit 451, the power purchase upper limit determination unit 104 determines that the purchased power or the discharge power is supplied.
(Step ST110)
When it is determined that the purchased power or the discharged power is supplied (step ST109: YES), the power purchase upper limit determination unit 104 changes the insufficient power amount obtained last time according to the supplied power amount supplied to the vehicle, The upper limit value of the purchased power is determined based on the amount of power that can be charged to the stationary storage battery 400 with the changed insufficient power amount.

(Step ST111)
If purchased electric power or discharge power is determined not to be powered (step ST 109: NO), the power purchase upper limit determining unit 104 determines whether the prospective power generation amount of power P _PV changes. The power generation prediction unit 103 re-predicts the amount of power that can be generated by the solar power generation system 200 within the prediction period based on, for example, weather information acquired from the information providing device 800, and purchases the calculated predicted power generation amount P _PV. Output to the upper limit determination unit 104. The power purchase upper limit determination unit 104 compares the predicted power generation amount P _PV predicted again with the predicted power generation amount P _PV 137 stored in the storage unit 13, and the current predicted power generation amount P _PV is It is determined whether or not the predicted power generation amount P _PV 137 is changed. When the predicted power generation amount P _PV predicted again is larger than the predicted power generation amount P _PV 137 stored in the storage unit 13, the power purchase upper limit determination unit 104 determines that the predicted power generation amount P _PV has increased. To do. On the other hand, when the predicted power generation amount P _PV predicted again is smaller than the predicted power generation amount P _PV 137 stored in the storage unit 13, the power purchase upper limit determination unit 104 decreases the predicted power generation amount P _PV . Is determined.

(Step ST112)
When it is determined that the predicted power generation amount P _PV has changed (step ST111: YES), the power purchase upper limit determination unit 104 is based on the predicted power generation amount P _PV predicted again by the power generation prediction unit 103, and is determined to be insufficient last time. Change the amount of power. The power purchase upper limit determination unit 104 determines the upper limit value of the power purchase power based on the amount of power that can charge the stationary storage battery 400 with the changed insufficient power amount. For example, when it is determined that the predicted power generation amount _PPV has increased, the power shortage amount decreases below the power shortage obtained last time, so that the power purchase upper limit determination unit 104 obtains the power supply power upper limit value last time. It can be lower than the upper limit. When it is determined that the predicted power generation amount P _PV has decreased, the power shortage amount increases more than the previously determined power shortage amount. Therefore, the power purchase upper limit determination unit 104 determines the power supply power upper limit value previously determined. Can be higher than the value.

(Step ST113)
If the predicted power generation amount P _PV is determined not to be changed (step ST111: NO), the power purchase upper limit determining section 104 refers to the prediction period setting 133 of the storage unit 13, the prediction period has expired It is determined whether or not. For example, the power purchase upper limit determination unit 104 determines whether or not the current time has reached 19:00, and determines that the prediction period has ended when the current time has reached 19:00.
When it is determined that the prediction period has not ended (step ST113: NO), the power purchase upper limit determination unit 104 returns to the process of step ST109 and repeats the process. (Step ST114)
When it is determined that the prediction period has ended (step ST113: YES), the power purchase upper limit determination unit 104 determines whether or not the end of the power purchase upper limit setting process has been instructed.
When the end is instructed (step ST114: YES), the power purchase upper limit determination unit 104 ends the process.
When the termination is not instructed (step ST114: NO), the power purchase upper limit determination unit 104 returns to the process of step ST102 and repeats the process.

As described above, the charging facility management apparatus 100 according to the present embodiment predicts the amount of power that can be supplied from the commercial power supply 300 to the vehicle based on the number of vehicles that are expected to use the charger within the prediction period. A power supply power prediction unit 102 and a power generation prediction unit 103 that predicts the amount of power that can be generated by the solar power generation system 200 within the prediction period. In addition, the charging facility management apparatus 100 is configured to supply power to the vehicle from the charger 500 within the prediction period based on the prediction result predicted by the power supply amount prediction unit 102 and the prediction result predicted by the power generation prediction unit 103. The power purchase required for the commercial power source 300 within the prediction period is determined based on the power that can be charged into the stationary storage battery 400 within the prediction period by obtaining the insufficient power amount that is insufficient when the predicted generated power is used. A power purchase upper limit determination unit 104 that determines an upper limit value of electric power is provided.
With this configuration, it is possible to charge the stationary storage battery 400 with electric power according to the number of vehicles using the charger 500, and to purchase electric power according to the electric power generated by the solar power generation system 200 from the commercial power supply 300. Can do. Therefore, the amount of purchased power purchased from the commercial power supply 300 can be optimized.

In addition, the charging facility management apparatus 100 according to the present embodiment further includes a supplementary value calculation unit 105 that calculates a supplementary value for supplementing the predicted number of used units acquired by the usage prediction unit 101 according to the usage status of the charger 500. Prepare. The feed power amount prediction unit 102 predicts the feed power amount based on a value obtained by supplementing the use number prediction value acquired by the use prediction unit 101 based on the supplement value.
With this configuration, it is possible to reduce an error in the number of vehicles using the charger 500 that changes according to the usage status of the charger 500.

In addition, the charging facility management apparatus 100 according to the present embodiment charges the stationary storage battery 400 with the upper limit value of the purchased power determined by the power purchase upper limit determination unit 104 during the period when the charger 500 is not supplying power to the vehicle. The charging control unit 106 is further provided to set the value of purchased power to be purchased.
With this configuration, it is possible to charge the stationary storage battery 400 with electric power corresponding to the number of vehicles using the charger 500.

In addition, the power purchase upper limit determination unit 104 of the charging facility management apparatus 100 according to the present embodiment responds to a request corresponding to a threshold or a demand response that is determined in a contract as an upper limit at which the charge of purchased power is switched. than the maximum value of the purchased electric power in the prediction period is determined Te, if the upper limit value P _BC of the determined power purchase power is high, a threshold or maximum value the upper limit value P1 power purchase power.
With this configuration, it is possible to realize peak cut and control of purchased power according to a request corresponding to a demand response.

In addition, the power supply power prediction unit 102 of the charging facility management apparatus 100 according to the present embodiment predicts the power supply power on the assumption that the power purchased from the commercial power supply 300 is a determined minimum value.
With this configuration, even if it is a situation in which only the power of the minimum value P _low can be purchased as the purchased power from the commercial power supply 300, it is calculated from the amount of power supplied according to the number of vehicles predicted to use the charger 500 during the prediction period. The required storage amount can be charged to the stationary storage battery 400.

In addition, the power purchase upper limit determination unit 104 of the charging facility management apparatus 100 according to the present embodiment, when the charger 500 supplies the purchased power or the discharged power to the vehicle within the prediction period, the supplied power supplied to the vehicle. The insufficient power amount obtained last time is changed according to the amount, and the upper limit value of the purchased power is determined based on the power amount that can charge the stationary storage battery 400 with the changed insufficient power amount.
With this configuration, even if the amount of supplied power within the prediction period changes, the upper limit value of the purchased power according to the insufficient amount of power can be determined.

Moreover, the power generation prediction unit 103 of the charging facility management apparatus 100 according to the present embodiment predicts the amount of power that can be generated by the solar power generation system 200 a plurality of times within the prediction period. When the power generation prediction unit 103 predicts that the amount of power that can be generated is larger than the previous prediction result, the power purchase upper limit determination unit 104 changes the insufficient power amount obtained last time based on the current prediction result, The upper limit value of the purchased power is determined based on the amount of power that can be charged to the stationary storage battery 400 with the changed insufficient power amount.
With this configuration, even when the amount of generated power within the prediction period changes, the upper limit value of the purchased power corresponding to the insufficient amount of power can be determined.

In addition, the charging facility management apparatus 100 according to the present embodiment calculates the discharge power that can be supplied to the vehicle based on the remaining amount of charge of the stationary storage battery 400 when power supply is started from the charger 500 to the vehicle. Based on the discharge power calculated by the discharge power calculation unit 108 and the discharge power calculation unit 108, the charger 500 includes a power supply range determination unit 109 that determines a range of power supply power that can be supplied to the vehicle.
With this configuration, it is possible to prevent the stationary storage battery 400 from supplying power while the charger 500 is supplying power to the vehicle, and the power supply of the vehicle from being interrupted. In a situation where it is not known at what time the vehicle will start supplying power within the prediction period, it may be assumed that the stationary storage battery 400 has not yet been charged with sufficient power, which is particularly beneficial in such a case.

Moreover, the charging equipment management apparatus 100 according to the present embodiment includes a charge amount correction unit 110 that corrects the remaining amount of electricity stored in the stationary storage battery 400 calculated by the discharge power calculation unit 108 based on the usage period of the stationary storage battery 400. .
With this configuration, even if the storage battery of the stationary storage battery 400 has deteriorated over time, the power supply range can be determined according to the degree of deterioration. The stationary storage battery 400 is known to have a reduced maximum charge capacity due to aging. For this reason, even if the percentage display of the storage amount (SOC) of the storage battery of the stationary storage battery 400 is the same, the storage amount is smaller than that at the time of use disclosure over time, and there is a high possibility that the amount of power indicated by the percentage display cannot be discharged. This is particularly useful in such cases.

The present invention is not limited to the configuration described above. For example, the power management apparatus 600 and the electric vehicle management apparatus 700 are both xEMS (CEMS, BEMS, etc.), for example, and may have the same configuration.
Further, the usage predicting unit 101 or the like may obtain a predicted number of used units based on reservation information of the charger 500 or the like.
In addition, a configuration unit (a power purchase upper limit setting unit) including a usage prediction unit 101, a power supply power prediction unit 102, a power generation prediction unit 103, a power purchase upper limit determination unit 104, and a supplementary value calculation unit 105, and a discharge power calculation The configuration unit (power supply range setting unit) including the unit 108, the power supply range determination unit 109, and the charge amount correction unit 110 may be a separate member.

  The program for realizing the function of the charging facility management apparatus 100 according to the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 100 Charging equipment management apparatus 200 Solar power generation system 300 Commercial power supply 400 Stationary storage battery 500 Charger 600 Power management apparatus 700 Electric vehicle management apparatus 800 Information provision apparatus 901 Onboard equipment 902 Onboard equipment 903 Onboard equipment 904 Onboard equipment 250 DC / DC conversion Circuit 251 Power generation power control circuit 252 Power circuit 350 AC / DC conversion circuit 351 Power purchase power control circuit 352 Power circuit 450 DC / DC conversion circuit 451 Charge / discharge power control circuit 452 Power circuit 550 DC / DC conversion circuit 551 Charging power control circuit 552 Power circuit 430 Storage battery state monitoring device 11 Communication unit 12 Calculation unit 13 Storage unit 14 Operation unit 101 Use prediction unit 102 Power supply power prediction unit 103 Power generation prediction unit 104 Power purchase upper limit determination unit 105 Supplementary value calculation unit 106 Charging control unit 107 Power supply start determination unit 108 Electric power calculation unit 109 Power supply range determination unit 110 Charge amount correction unit 131 Minimum value of purchased power P _low
132 P _{max of} purchased power
133 Prediction period set value 134 Remaining vehicle charge information 135 Vehicle position information 136 Predicted power supply amount Q _exp
137 Predicted power generation amount P _PV

Claims (5)

The vehicle can be charged by receiving a generator capable of generating electric power from natural energy , a stationary storage battery, power generated from the generator, purchased power from a commercial power source, and discharged power from the stationary storage battery. In a charging facility management apparatus that manages a charging facility comprising a charger,
Based on a predicted value of the number of vehicles predicted to use the charger within a predetermined period, a power supply amount prediction unit that predicts an amount of electric power that can be supplied from the charger to the vehicle within the predetermined period When,
A power generation prediction unit that predicts the amount of power generated by the generator within the predetermined period ;
Lack of power supplied from the charger within the predetermined period when said power supply power amount prediction unit is based on the generated power amount that is predicted the generator prediction unit and the feeding amount of power predicted, using the generator A power purchase upper limit determination unit that obtains an electric energy and determines an upper limit value of the electric power required for the commercial power source to charge the stationary storage battery when the vehicle is not powered based on the insufficient electric energy; ,
A charging facility management apparatus comprising:   The charging facility management apparatus according to claim 1, wherein control is performed so that the vehicle is charged with priority on the generated power.   3. The charging facility management device according to claim 2, wherein when the generated power is insufficient to charge the vehicle, control is performed so that the purchased power is charged to the vehicle with priority next. .   When the generated power and the purchased power are insufficient to charge the vehicle, the vehicle is controlled to charge the discharge power in addition to the generated power and the purchased power. The charging equipment management device according to claim 3.   If the generated power or the purchased power is supplied as power for charging the vehicle with priority, and the generated power or the purchased power is insufficient to charge the vehicle, the generated power or the purchased power 2. The charging facility management device according to claim 1, wherein, in addition to electric power, control is performed so that the vehicle is charged with the discharge power in preference to the generated power or the purchased power.

Images