JP2012253976A - Charge/discharge controller, and charge/discharge control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable, when a storage battery mounted on an electric vehicle is used as an electric storage unit in a micro-grid system, charging and discharging to be performed appropriately according to different characteristics of the storage battery.SOLUTION: A micro-grid system comprises: an EV storage battery property database 120 storing upper limits of charging and discharging power corresponding to the makers and types of an EX storage battery 310; and an EV storage battery control section 112 that acquires relevant information about an EV storage battery from an electric vehicle 300 and acquires the upper limits of charging and discharging power corresponding to the makers and types in the relevant information about the EV storage battery from the EV storage battery property database 120. On the basis of the upper limits of charging and discharging power, the EV storage battery control section 112 corrects charging and discharging power designated by a superior control section 111 to execute charge/discharge control to the EV storage battery 310.

Description

  The present invention relates to a charge / discharge control apparatus and method for controlling charge / discharge of a storage battery of an electric vehicle, for example, provided in a microgrid system. Moreover, it is related with the program for making a charging / discharging control apparatus implement | achieve the function corresponding to the said charging / discharging control method.

  In recent years, there is a movement to promote the practical use of microgrids as energy supply systems. A microgrid is a system that combines a plurality of distributed power supply facilities, power storage facilities, and a control device that controls power supply between these facilities in a relatively limited range such as in a certain area or building facility. is there.

  In recent years, practical use of electric vehicles has been promoted. An electric vehicle uses a motor as a power source instead of a gasoline engine and is equipped with a rechargeable battery that supplies electric power for driving the motor.

  Against this background, it has been proposed to use a storage battery mounted on an electric vehicle as one of power storage facilities in a microgrid. For example, in Patent Document 1, in an electric power supply system that supplies electric power from a storage battery mounted on an electric vehicle to a house, when the electric vehicle is connected to the electric power supply system, the mileage for the next day Electricity other than the amount of electric power is supplied to the house.

JP2011-55589A

  However, there are a plurality of manufacturers, models, and models of electric vehicles. And according to the difference of such an electric vehicle, in many cases, the storage battery mounted on the manufacturer and the model are different. Such differences in manufacturer and model directly lead to differences in the characteristics of storage batteries. That is, the characteristics of the storage battery of an electric vehicle vary depending on the manufacturer of the electric vehicle and the vehicle type. Even if the storage battery of an electric vehicle is used for a microgrid without considering such a difference in characteristics, a problem occurs, and practical application is difficult.

  As an example, lithium-ion batteries are widely used for electric vehicle storage batteries. However, as one of the characteristics of lithium-ion batteries, the charge / discharge rate (storage battery capacity) for each type such as the manufacturer and model is one of the characteristics. The ratio of electric power that can be charged and discharged instantaneously) is determined. For example, if charging / discharging is performed while ignoring this charging / discharging rate, the battery life is greatly deteriorated.

  Accordingly, in consideration of the above-described problems, the present invention uses a storage battery mounted on an electric vehicle as a power storage facility for a microgrid so that charging and discharging are appropriately performed corresponding to the difference in characteristics of the storage battery. The purpose is to do.

  The present invention has been made in view of the above problems, and is connected to an in-vehicle storage battery, and charging / discharging means for charging or discharging the connected in-vehicle storage battery, and identification for each of a plurality of types of the in-vehicle storage batteries. The storage means for storing the information and the characteristic information indicating the predetermined characteristics of the vehicle storage battery of the corresponding type in association with each other, and the object identification information which is the identification information of the target vehicle storage battery connected to the charge / discharge means is acquired from the outside Based on target characteristic information associated with the target identification information among characteristic information stored in the information acquisition means and the storage means, charging / discharging control is performed on the charging / discharging means. A charge / discharge control apparatus comprising: a discharge control means.

  In addition, the present invention provides an information acquisition procedure for acquiring target identification information, which is identification information of a target in-vehicle storage battery connected to a charging / discharging unit that charges or discharges the in-vehicle storage battery, and a plurality of types of the in-vehicle storage batteries. Out of the characteristic information indicating the predetermined characteristic of the corresponding type of in-vehicle storage battery stored in the storage unit in association with the identification information for each, based on the target characteristic information associated with the target identification information. A charge / discharge control method comprising a charge / discharge control execution procedure for executing charge control or discharge control on a discharge unit.

  Further, the present invention provides an information acquisition procedure for acquiring, from the outside, target identification information that is identification information of a target vehicle storage battery connected to a charge / discharge unit that charges or discharges the vehicle storage battery to the charge / discharge control device, Target characteristic information associated with the target identification information among characteristic information indicating a predetermined characteristic of the corresponding type of in-vehicle storage battery stored in the storage unit in association with identification information for each of the plurality of types of in-vehicle storage batteries And a charge / discharge control execution procedure for executing charge control or discharge control on the charge / discharge unit.

  According to the present invention, when a storage battery mounted on an electric vehicle is used as a power storage facility of a microgrid, an effect that charging / discharging is appropriately performed corresponding to the difference in characteristics of the storage battery is obtained.

It is a figure which shows the structural example of the microgrid system in embodiment of this invention. It is a figure which shows the structural example of EV storage battery related information and EV storage battery characteristic database in embodiment of this invention. It is a figure which shows the process sequence example for charging / discharging control with respect to the electrical storage apparatus and EV storage battery which a high-order control part performs. It is a figure which shows the process sequence example for charging / discharging control with respect to the electrical storage apparatus and EV storage battery which a high-order control part performs. It is a figure which shows the process sequence example for charging / discharging control with respect to EV storage battery which an EV storage battery control part performs. It is a figure which shows the process sequence example for charging / discharging control with respect to EV storage battery which an EV storage battery control part performs. It is a figure which shows the process sequence example for charging / discharging control with respect to EV storage battery which an EV storage battery control part performs.

  FIG. 1 is a diagram illustrating a configuration example of a microgrid system according to the present embodiment. A microgrid system includes a plurality of distributed power supply facilities, power storage facilities, and a control device that controls power supply between these facilities in a relatively limited range such as in a certain area or building facility. A combined system. In the present embodiment, a microgrid system constructed corresponding to building facilities is taken as an example.

  The microgrid system shown in FIG. 1 is constructed for a building equipment 100 such as a house, a building, or a facility. The microgrid system in the building facility 100 includes a power control unit 110, an EV (Electric Vehicle) storage battery characteristic database 120, a building load 130, a charging station 140, a solar power generation device 150, and a power storage device 160.

  The power control unit 110 is a part that controls the operation related to charging / discharging of the electric storage battery 310 connected to the power storage device 160 via a charging station 140 described later. The power control unit 110 is configured as a computer system including, for example, a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM).

  The power control unit 110 includes a host control unit (upper charge / discharge control unit) 111 and an EV storage battery control unit (charge / discharge control unit) 112. The upper control unit 111 detects the power at the power receiving point 210 of the power line 200 and performs power control so that, for example, this power is constant. As one of the power controls, the host control unit 111 executes charge / discharge control for the power storage device 160 that is a power storage facility and the EV storage battery 310. For example, for the EV storage battery 310, the upper control unit 111 performs control by treating it as one power storage facility included in the microgrid system, similarly to the power storage device 160, without considering the difference in characteristics.

  The EV storage battery control unit 112 is a part that performs charge / discharge control with respect to the EV storage battery 310 in a lower level of the upper control unit 111, and is adapted to the characteristics of the EV storage battery 310 to be controlled upon receiving a charge / discharge instruction from the upper control unit 111. The charging / discharging operation is controlled.

  In charge / discharge control for the EV storage battery 310, the upper control unit 111 outputs a charge command value or a discharge command value for instructing charging or discharging power. Since the charge command value and the discharge command value from the host control unit 111 do not take into consideration the specification of the charge / discharge rate of the EV storage battery 310, the charge / discharge power upper limit value of the EV storage battery 310 is exceeded as it is. May end up. Therefore, the EV storage battery control unit 112 corrects the charge command value and the discharge command value output from the host control unit 111 as necessary, and outputs them to the charging station 140 as necessary. Hereinafter, the charge command value and the discharge command value output by the host controller 111 corresponding to the EV storage battery 310 are respectively expressed as the upper charge command value (first charge power) and the upper discharge command value (first discharge power). ). Further, the charge command value and the discharge command value output from the EV storage battery control unit 112 are referred to as a lower charge command value (second charge power) and a lower discharge command value (second discharge power), respectively.

  The EV storage battery characteristic database 120 stores information (characteristic information) on characteristics of the EV storage battery 310 corresponding to a plurality of different types (manufacturers and models). The EV storage battery characteristic database 120 is stored in a storage medium (storage means) such as an HDD (Hard Disc Drive) or a flash memory. A structural example of the EV storage battery characteristic database 120 will be described later.

  The building load 130 is a load to which electric power is supplied from the commercial system 400, the solar power generation device 150, and the power storage device 160. Specifically, the building load 130 supplies electric power such as various electronic devices and lighting provided in the building facility 100. It becomes a device or appliance to consume.

  The charging station 140 is connected to, for example, a charging connector provided in the electric vehicle 300, and exchanges electric power with the EV storage battery 310 of the electric vehicle 300 by being connected to this connector. It becomes possible. The charging station 140 can supply the power discharged from the EV storage battery 310 to the building load 130 by being connected to the power line 200. Moreover, the charging station 140 can supply the electric power from the commercial system 400 or the solar power generation device 150 to the EV storage battery 310 as charging power.

  The solar power generation device 150 is a device that performs solar power generation. The electric power generated in the solar power generation device 150 can be supplied to the building load 130 and the power storage device 160 via the power line 200. Also, charging power can be supplied from the power line 200 to the EV storage battery 310 via the charging station 140.

  The power storage device 160 is fixedly provided in the building facility 100 and can store supplied power. Electric power from the commercial system 400 and the solar power generation device 150 is supplied to the power storage device 160 as charging power via the power line 200. In addition, the power storage device 160 can supply discharge power to the building load 130 via the power line 200. In addition, the charge / discharge operation in power storage device 160 is performed with electric power according to the charge / discharge command value specified by host control unit 111.

  The electric vehicle 300 is a vehicle that uses a motor as a power source, and includes an EV storage battery 310 (an in-vehicle storage battery) for driving the motor. Moreover, the electric vehicle 300 includes a storage battery information output unit 320. Storage battery information output unit 320 outputs predetermined information (EV storage battery related information) related to EV storage battery 310 to EV storage battery control unit 112. As an example, the EV storage battery related information includes the manufacturer, model number, remaining capacity, and estimated travel distance of the EV storage battery 310 as shown in FIG. The planned travel distance here is the travel distance of the electric vehicle 300 that is predicted until the current connection to the grid system is released and the next connection to the grid system is established.

  As for the remaining capacity, for example, the voltage value of the EV storage battery 310 detected at the charging station 140 is input, and the EV storage battery control unit 112 is configured to determine the remaining capacity based on this voltage value. It is also possible.

  As described above, the electric vehicle 300 includes a connector for charging. By connecting this connector to the connector of the charging station 140, power can be exchanged between the EV storage battery 310 and the charging station 140. Furthermore, by connecting this connector, the storage battery information output unit 320 is communicably connected to the EV storage battery control unit 112.

  The microgrid system configured as described above performs, for example, a load following operation (an operation for controlling the amount of power generation so that the amount of power sold is constant) mainly by power from the commercial system 400 during normal times. Further, in a state where power is insufficient due to a power failure or for some reason, power can be supplied to the building load 130 by self-sustained operation using the accumulated power.

  Further, in a microgrid system, it is required to always operate appropriately in response to a power supply / demand balance that varies with the passage of time. The fluctuation factors of power supply and demand are load fluctuations and fluctuations in the amount of power generated by a power generator such as the solar power generator 150. These fluctuations may be steep or slow, and may include a plurality of frequency fluctuation components. Is included. Therefore, by combining as many distributed power sources as possible with respect to power fluctuations, the power fluctuations described above can be effectively suppressed. In particular, the power storage facility can effectively suppress steep power fluctuations.

  In view of the above points, the power storage equipment is required to ensure a sufficient capacity as much as possible. However, if the building equipment 100 tries to satisfy the power storage equipment, a considerable cost is required. Therefore, if the EV storage battery 310 is introduced as one of the power storage equipment as in the present embodiment, the power storage equipment can be added at a low cost. Moreover, if the supply amount is larger than the power demand amount in the microgrid system, the EV storage battery 310 can be charged.

  However, charging / discharging with respect to the EV storage battery 310 cannot be performed under the same conditions as the power storage equipment provided in the building equipment 100 such as the power storage device 160. This is because the EV storage battery 310 has different characteristics depending on the manufacturer and model of the electric vehicle 300 to be mounted. For example, in a lithium ion battery widely adopted as the EV storage battery 310, an upper limit value of electric power at the time of charging / discharging is determined as a charging / discharging rate. If charging / discharging is performed while ignoring this characteristic, the performance of the EV storage battery 310 may be greatly reduced.

  Therefore, in the present embodiment, an appropriate charge / discharge operation is performed in accordance with the difference in the characteristics of the EV storage battery 310. Thereby, practical use of the microgrid system including the EV storage battery 310 as the power storage facility is promoted. This point will be described below.

  FIG. 2B shows a structural example of the EV storage battery characteristic database 120. One record in the EV storage battery characteristic database 120 includes attributes of manufacturer, model number, charge power upper limit value, discharge power upper limit value, and storage capacity. The manufacturer indicates the manufacturer that manufactured the corresponding EV storage battery 310, and the model number indicates the model number of the corresponding EV storage battery 310. The corresponding EV storage battery 310 is uniquely specified by the manufacturer and model number. In general, the EV storage battery 310 can be specified only by the model number, but the possibility that the model number is the same among different manufacturers cannot be completely denied. Therefore, the EV storage battery 310 can be specified more completely by combining the model number and the manufacturer.

  The charge power upper limit value, the discharge power upper limit value, and the storage capacity are each one of the characteristics of the corresponding EV storage battery 310. The charging power upper limit value indicates an upper limit value of electric power that can be instantaneously supplied to the EV storage battery 310 during charging. The discharge power upper limit value indicates the upper limit value of power that can be instantaneously discharged from the EV storage battery 310 during discharge. These charge power upper limit value and discharge power upper limit value are also referred to as charge / discharge rates. The storage capacity indicates the total capacity that the EV storage battery 310 can store, and corresponds to the capacity when fully charged.

  For example, if a new model electric vehicle 300 is sold, the EV storage battery 310 of a new manufacturer and model number will be mounted in many cases. Therefore, it is preferable to update the EV storage battery characteristic database 120 so that information on the EV storage battery 310 of a new manufacturer and model number is sequentially added. In order to store the data as the EV storage battery characteristic database 120 in the microgrid system according to the present embodiment including such an update, for example, the data of the EV storage battery characteristic database 120 is obtained by downloading via a network, It is conceivable to store this in a storage medium mounted on the microgrid system. Alternatively, the data of the EV storage battery characteristic database 120 stored in a removable storage medium may be read and stored in a storage medium mounted on the microgrid system.

  Next, with reference to the flowcharts of FIGS. 3 and 4, an example of a processing procedure for charge / discharge control for the power storage device 160 and the EV storage battery 310 will be described as power control executed by the host control unit 111.

  For example, the host control unit 111 constantly detects the power at the power receiving point 210 of the power line 200 and controls the power to be constant. Then, based on the detection result of the power fluctuation at the power receiving point 210, either the charging mode or the discharging mode is set. The charging mode is a mode for charging power storage equipment such as the power storage device 160 and the EV storage battery 310 in response to a state in which the power fluctuates more than a certain level when the power demand is lower than the power supply amount. The discharge mode corresponds to a state in which the electric power fluctuates below a certain level due to the electric power demand exceeding the electric power supply, and the electric power stored in the electric storage equipment such as the electric storage device 160 and the EV storage battery 310 is used as the building load 130. It is the mode which discharges so that it may supply.

  Then, the upper control unit 111 determines whether the currently set mode is the discharge mode based on the mode setting result (step S101). Here, when it is determined that the mode is not the discharge mode, that is, the charge mode (NO in step S101), the upper control unit 111 proceeds to step S201 in FIG. 4 to be described later.

  On the other hand, when it determines with it being a discharge mode (step S101-YES), the high-order control part 111 determines whether the electric vehicle 300 is currently connected with respect to the charging station 140 (step S102). ). In a state where electric vehicle 300 is connected to charging station 140, storage battery information output unit 320 and EV storage battery control unit 112 are connected to be communicable. Then, whether or not the electric vehicle 300 is connected can be determined based on the notification regarding the connection of the electric vehicle 300 from the EV storage battery control unit 112.

  When it is determined that the electric vehicle 300 is not connected (NO in step S102), the host control unit 111 instructs the EV storage battery control unit 112 to stop discharging the EV storage battery 310. For power storage device 160, an upper discharge command value is set based on the current power at power receiving point 210, discharge is instructed from the upper discharge command value (step S105), and the process returns to step S101. That is, only the power storage device 160 is discharged.

  When stopping the discharge of the EV storage battery 310, for example, a command for that purpose may be output, or the upper discharge command value for the EV storage battery 310 may be set to “0”. When the EV storage battery control unit 112 performs control according to such an instruction, the charging station 140 is set in a state in which the EV storage battery 310 is not discharged. For power storage device 160, for example, power corresponding to the required power corresponding to the current power supply / demand balance is set as a discharge command value and output.

  In addition, when the EV storage battery 310 is connected to the charging station 140 and shifts to the discharge mode, the EV storage battery 310 is prioritized for discharging. Specifically, if the demand power can be covered by the discharge of only the EV storage battery 310, only the EV storage battery 310 is discharged, and the discharge from the power storage device 160 is stopped. If it cannot be covered, the EV storage battery 310 is discharged by the upper limit value of the discharge power, and the power storage device 160 is caused to discharge the insufficient power. When the discharge of the electric energy that can be discharged by the EV storage battery 310 is completed, the discharge of the EV storage battery 310 is terminated, and the discharge is switched to the discharge of only the power storage device 160.

  Therefore, when the upper control unit 111 determines that the electric vehicle 300 is not connected (step S102—YES), the discharge of the EV storage battery 310 is completed based on the notification regarding the completion of charging from the EV storage battery control unit 112. It is determined whether or not (step S103). When it is determined that the discharge of the EV storage battery 310 is not completed (step S103—NO), the host control unit 111 determines the discharge command value for the power storage device 160 and the EV storage battery 310 according to the current power at the power receiving point 210. Is set, a discharge command value is output to power storage device 160 and EV storage battery control unit 112 to instruct discharge (step S104). That is, the power storage device 160 and the EV storage battery 310 are discharged. In step S104, when the discharge from power storage device 160 is stopped in accordance with the priority given to the discharge of EV storage battery 310 as described above, the upper discharge command value for power storage device 160 is set to “0”. And Alternatively, instead of this, a command for instructing to stop discharging may be output. Further, when it is determined that the discharge of the EV storage battery 310 is complete (step S103—YES), the process proceeds to step S105 to cause only the power storage device 160 to discharge.

  Next, the processing procedure example shown in FIG. 4 will be described. If it is determined in step S101 of FIG. 3 that the upper control unit 111 is in the charging mode, it is determined whether or not the electric vehicle 300 is connected to the charging station 140 as shown in FIG. Step S201). If it is determined that the electric vehicle 300 is not connected (step S201—NO), the process proceeds to step S206 described later.

  On the other hand, if the electric vehicle 300 is connected (step S201-YES), the upper control unit 111 next determines the current charging target (step S202). Depending on the balance of the battery and the remaining capacity of the EV storage battery 310 and the power storage device 160, when both the power storage device 160 and the EV storage battery 310 are charged, only the power storage device 160 or only the EV storage battery 310 may be used. is there. Further, if EV storage battery 310 and power storage device 160 are in a fully charged state, both are not charged even in the charging mode. That is, there may be no charge target. In step S202, it is determined which of the four charging targets is the current charging target.

  When the charging target is power storage device 160 and EV storage battery 310 (step S202— “power storage device, EV storage battery”), host control unit 111 charges charging command for power storage device 160 based on the power detected at power receiving point 210. The value and the charge command value for the EV storage battery 310 are set. Then, with these charging command values, the power storage device 160 and the EV storage battery control unit 112 are instructed to perform a charging operation (step S203), and the process returns to step S101 in FIG.

  Further, when the charging target is only EV storage battery 310 (step S202— “EV storage battery only”), host control unit 111 instructs power storage device 160 to stop charging. At the same time, an upper charge command value is set for the EV storage battery control unit 112 based on the electric power at the power receiving point 210, and charging is instructed by the upper charge command value (step S204). In step S101 of FIG. Return.

  In addition, when the charging target is only the EV storage battery 310 (step S202— “only power storage device”), the upper control unit 111 sets a charge command value for the power storage device 160, thereby instructing charging, The EV storage battery control unit 112 is instructed to stop charging (step S205). Then, the process returns to step S101 in FIG.

  Furthermore, when there is no charge target (step S202— “no charge target”), the host control unit 111 instructs both the power storage device 160 and the EV storage battery control unit 112 to stop charging (step S206), and FIG. Return to step S101. As described above, the host control unit 111 executes charge / discharge control for the power storage equipment (the power storage device 160 and the EV storage battery 310) according to the power obtained at the power receiving point 210.

  Through the above processing, the upper control unit 111 can perform charge / discharge control on the power storage device 160 and the EV storage battery 310 which are power storage facilities. However, as described above, the upper charge command value and the upper discharge command value set by the upper control unit 111 during the charge / discharge control for the EV storage battery 310 are simply obtained according to the power at the power receiving point 210. The difference in charge / discharge rate according to the type of EV storage battery 310 is not considered. Therefore, the EV storage battery control unit 112 corrects the upper charge command value and the upper discharge command value as necessary by the process described below, and charges / discharges the EV storage battery 310 with appropriate charge / discharge power corresponding to the characteristics. To be done.

  An example of a processing procedure for charge / discharge control executed by the EV storage battery control unit 112 will be described with reference to the flowcharts of FIGS. First, an example of a processing procedure executed by the EV storage battery control unit 112 according to the connection state of the electric vehicle 300 will be described with reference to the flowchart of FIG.

  The EV storage battery control unit 112 waits for the electric vehicle 300 to be connected (step S301-NO). And if it detects that the electric vehicle 300 was connected (step S301-YES), the EV storage battery control part 112 will notify the high-order control part 111 that the electric vehicle 300 was connected with respect to the high-order control part 111. (Step S302).

  Next, the EV storage battery control unit 112 acquires EV storage battery related information by communicating with the storage battery information output unit 320 of the connected electric vehicle 300 (step S303). The EV storage battery control unit 112 that executes the process of step S303 corresponds to the information acquisition means described in the claims. Then, the EV storage battery control unit 112, from the EV storage battery characteristic database 120, each characteristic information of the charge power upper limit value, the discharge power upper limit value, and the charge capacity associated with the combination of the manufacturer and the model number included in the EV storage battery related information. Is acquired (step S304). This characteristic information is used in charge / discharge control for the EV storage battery 310 to be described later.

  Next, the EV storage battery control unit 112 waits for the connection of the electric vehicle 300 to be released (step S305—NO). And if it determines with the connection of the electric vehicle 300 having been cancelled | released (step S305-YES), the EV storage battery control part 112 will notify that the connection of the electric vehicle 300 was cancelled | released with respect to the high-order control part 111 ( Step S306) and return to Step S301.

  Next, with reference to FIG. 6 and FIG. 7, an example of a processing procedure of charge / discharge control for the EV storage battery 310 executed by the EV storage battery control unit 112 will be described. The process shown in this figure is executed under the state where it is determined in step S301 in FIG. 5 that the electric vehicle 300 is connected.

  In FIG. 6, the EV storage battery control unit 112 determines whether or not the upper control unit 111 is in a state in which a discharge instruction to the EV storage battery 310 is performed (step S <b> 401). If it is determined that a discharge instruction has not been issued (step S401—NO), the process proceeds to step S501 in FIG.

  On the other hand, when it determines with the discharge instruction | indication being performed (step S401-YES), the EV storage battery control part 112 uses the remaining capacity and the estimated travel distance in the EV storage battery related information acquired by step S303 of FIG. The dischargeable capacity is calculated by using (step S402). As a specific example of obtaining this dischargeable capacity, one is to obtain the amount of electric power necessary for the EV storage battery 310 to travel the planned mileage, and subtract this electric energy from the remaining capacity. Thereby, the dischargeable capacity is calculated. That is, the dischargeable capacity is a surplus of the required amount of electric power according to the planned travel distance in the current remaining capacity. Thus, in the present embodiment, even if EV storage battery 310 is used only for discharging, the minimum amount of electric power that does not hinder the use of electric vehicle 300 is discharged.

  Next, the EV storage battery control unit 112 compares the upper discharge command value received from the upper control unit 111 with the discharge power upper limit value in the EV storage battery related information, and determines whether or not the upper discharge command value is larger. Determination is made (step S403). Although the upper discharge command value is larger, causing the discharge according to the upper discharge command value as it is causes deterioration of the EV storage battery 310. Therefore, when it is determined that the upper discharge command value is larger (YES in step S403), the EV storage battery control unit 112 sets the lower discharge command value equal to the discharge power upper limit value to discharge to the charging station 140. Is instructed (step S404). In this manner, the upper discharge command value is corrected so as not to exceed the discharge power upper limit value. Thereby, the charging station 140 discharges with the electric power of the discharge power upper limit value corresponding to the maker and model number of the connected EV storage battery 310. That is, the EV storage battery 310 can be discharged with appropriate power. In step S404, for example, for the purpose of providing a margin, a lower discharge command value that is somewhat lower than the discharge power upper limit value may be set.

  On the other hand, when the upper discharge command value is equal to or lower than the discharge power upper limit value (step S403-NO), the EV storage battery control unit 112 sets the lower discharge command value by the same value as the upper discharge command value and performs discharge. An instruction is given (step S405). Thereby, the charging station 140 is made to discharge with the electric power below the discharge power upper limit of the EV storage battery 310. Since the discharge power in this case does not exceed the discharge power upper limit value, the performance of the EV storage battery 310 is not deteriorated.

  Next, the EV storage battery control unit 112 waits for the discharge of the electric energy corresponding to the dischargeable capacity calculated in step S402 to be completed (step S406-NO). At this time, the EV storage battery control unit 112 calculates the time required to discharge the amount of power corresponding to the dischargeable capacity by using, for example, the dischargeable capacity and the lower discharge command value. It waits for the calculated time to elapse after the discharge is started.

  And if it determines with the discharge of the electric energy according to dischargeable capacity having been completed according to said time having passed (step S406-YES), the EV storage battery control part 112 will stop discharge with respect to the charging station 140. Is instructed (step S407). In response to this, the charging station 140 stops discharging from the EV storage battery 310. In addition, the EV storage battery control unit 112 notifies the host control unit 111 that the discharge has been completed (step S408), and returns to step S401. This notification content is used for the determination in step S103 of FIG.

  Next, the processing procedure shown in FIG. 7 will be described. If it is determined in step S401 in FIG. 6 that a discharge instruction has not been given, it is either a charge instruction or a charge stop instruction at present. Therefore, the EV storage battery control unit 112 determines whether or not a charging instruction is performed in FIG. 7 (step S501). Here, when it is determined that the charging instruction is not performed (step S501-NO), the charging is instructed to stop. Therefore, the EV storage battery control unit 112 returns to step S101 in FIG.

  On the other hand, when it determines with the charge instruction | indication being performed (step S501-YES), the EV storage battery control part 112 calculates chargeable capacity | capacitance by remaining capacity and electrical storage capacity (step S502). The chargeable capacity is a capacity obtained by subtracting the remaining capacity from the storage capacity. That is, the chargeable capacity is a charge capacity necessary for making the EV storage battery 310 fully charged.

  Next, the EV storage battery control unit 112 determines whether or not the upper charge command value exceeds the charge power upper limit value (step S503). Here, if it is determined that the charging power upper limit value is exceeded (YES in step S503), the EV storage battery control unit 112 sets a lower discharge command value that is the same value as the charging power upper limit value, and sets the charging station 140 to the charging station 140. In response to this, charging is instructed (step S504). That is, the upper charge command value exceeding the charge power upper limit value is corrected to be equal to or less than the charge power upper limit value. On the other hand, when it determines with it being below a charging power upper limit (step S503-NO), the EV storage battery control part 112 sets the low-order discharge command value of the same value as a high-order charge command value, and charging station 140 Is instructed to charge (step S505).

  The EV storage battery control unit 112 waits for completion of charging with the amount of power corresponding to the chargeable capacity obtained in step S502 after performing the charging instruction in step S504 or S505 (step S506). NO). In this determination, for example, after obtaining the time required to charge the chargeable capacity based on the chargeable capacity and the lower discharge command value, and waiting for this time to elapse from the start of charging. Good. In addition, regarding the determination of whether or not the charging is completed, for example, the charging station 140 is configured to be able to detect the charging amount based on the voltage value of the EV storage battery 310 and is in a fully charged state. May be notified to the EV storage battery control unit 112.

  Then, when charging is completed (step S506-YES), the EV storage battery control unit 112 instructs the charging station 140 to stop charging (step S507). Thereby, the charging with respect to EV storage battery 310 is completed. In addition, the EV storage battery control unit 112 notifies the host control unit 111 that charging has been completed (step S508), and returns to step S401. This notification content is used, for example, in the determination in step S202 of FIG. By executing the processes shown in FIGS. 5 to 7 as described above, the upper discharge command value and the upper charge command value are corrected, and the target EV storage battery 310 can be charged and discharged with appropriate power. It becomes possible.

  1 shows a case where one electric vehicle 300 is connected to the microgrid system in order to simplify the description and illustration, two or more electric vehicles 300 can be connected. It is good also as a simple structure. That is, it is good also as a structure which can connect the 2 or more EV storage battery 310 as one of electrical storage equipment. Similarly, two or more power storage devices 160 may be provided. Further, although the electric vehicle 300 is taken as an example here, it can also be applied to a hybrid vehicle equipped with a storage battery. Moreover, about the kind of distributed power supply with which the microgrid system of this Embodiment is provided, other than the solar power generation device 150 shown by FIG. 1 may be employ | adopted, and the power generation device by a several different system is provided. Also good. Moreover, although the microgrid system corresponding to building facilities is assumed in FIG. 1, for example, the present invention can be applied to a microgrid system constructed for a certain area including a plurality of building facilities.

  Moreover, the power control unit 110 (the upper control unit 111 and the EV storage battery control unit 112) of the present embodiment can be configured as a computer system. have. The processing of the power control unit 110 described so far is stored in a computer-readable recording medium in the form of a program, and is executed when the computer reads and executes this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the program may be distributed to a computer via a communication line, and the computer that has received the distribution may execute the program.

DESCRIPTION OF SYMBOLS 100 Building equipment 110 Power control part 111 High-order control part 112 EV storage battery control part 120 EV storage battery characteristic database 130 Building load 140 Charging station 150 Solar power generation device 160 Power storage apparatus 200 Power line 210 Power receiving point 300 Electric vehicle 310 Storage battery 320 Storage battery information output part 400 Commercial system

Claims (8)

On-vehicle storage battery is connected, charging / discharging means for charging or discharging the connected on-vehicle storage battery, and
Storage means for storing identification information for each of the plurality of types of the in-vehicle storage battery and characteristic information indicating predetermined characteristics of the in-vehicle storage battery of the corresponding type in association with each other,
Information acquisition means for acquiring target identification information that is identification information of a target in-vehicle storage battery connected to the charge / discharge means from the outside;
Charge / discharge control means for performing charge control or discharge control on the charge / discharge means based on target characteristic information associated with the target identification information among characteristic information stored in the storage means;
A charge / discharge control apparatus comprising: Based on the power detected in the distributed power supply system including the in-vehicle storage battery, further comprising higher-order discharge control means for setting a first discharge power when discharging the in-vehicle storage battery,
The charge / discharge control means includes
A second discharge power is set based on the first discharge power and an allowable upper limit value of the discharge power indicated as the target characteristic information, and the discharge is performed so that the charging / discharging unit performs the discharge with the second discharge power. Execute control,
The charge / discharge control apparatus according to claim 1. The charge / discharge control means includes
When the first discharge power is larger than the allowable upper limit value of the discharge power, a value corresponding to the allowable upper limit value of the discharge power is set for the second discharge power, and the first discharge power is If the discharge power is less than or equal to the allowable upper limit, a value corresponding to the first discharge power is set for the second discharge power.
The charge / discharge control apparatus according to claim 2. The information acquisition means includes
Information on the remaining capacity of the target in-vehicle storage battery, and information on the travel distance planned until the target in-vehicle storage battery and the charge / discharge means are connected next,
The charge / discharge control means includes
Based on the information on the remaining capacity and the information on the travel distance, a dischargeable capacity of the target in-vehicle storage battery is obtained, and the charging is performed so that the target in-vehicle storage battery is discharged with an amount of power corresponding to the dischargeable capacity. Performing discharge control on the discharge means;
The charge / discharge control apparatus according to any one of claims 1 to 3, wherein the charge / discharge control apparatus is configured as described above. Based on the power detected in the distributed power supply system including the in-vehicle storage battery, further comprising higher-order charge control means for setting the first charging power when charging the in-vehicle storage battery,
The charge / discharge control means includes
The second charging power is set based on the first charging power and the allowable upper limit value of the charging power indicated as the target characteristic information, and charging is performed so that the charging / discharging unit performs charging with the second charging power. Execute control,
The charge / discharge control apparatus according to any one of claims 1 to 4, wherein The charge / discharge control means includes
When the first charging power is larger than the allowable upper limit value of the charging power, a value corresponding to the allowable upper limit value of the charging power is set for the second charging power, and the first charging power is If the charging power is less than or equal to the allowable upper limit value, a value corresponding to the first charging power is set for the second charging power.
The charge / discharge control apparatus according to claim 5. An information acquisition procedure for acquiring from the outside target identification information that is identification information of a target in-vehicle storage battery connected to a charge / discharge unit that charges or discharges the in-vehicle storage battery,
Target characteristic information associated with the target identification information among characteristic information indicating a predetermined characteristic of the corresponding type of in-vehicle storage battery stored in the storage unit in association with identification information for each of the plurality of types of in-vehicle storage batteries And charge / discharge control execution procedure for executing charge control or discharge control on the charge / discharge unit,
A charge / discharge control method comprising: Charge / discharge control device
An information acquisition procedure for acquiring from the outside target identification information that is identification information of a target in-vehicle storage battery connected to a charge / discharge unit that charges or discharges the in-vehicle storage battery,
Target characteristic information associated with the target identification information among characteristic information indicating a predetermined characteristic of the corresponding type of in-vehicle storage battery stored in the storage unit in association with identification information for each of the plurality of types of in-vehicle storage batteries And charge / discharge control execution procedure for executing charge control or discharge control on the charge / discharge unit,
A program for running

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