JP6634715B2 - Power conversion device, computer program, and power conversion method - Google Patents

Description

  The present invention relates to a power conversion device that converts power to both, a computer program for controlling the power conversion device, and a power conversion method.

  2. Description of the Related Art In recent years, from the viewpoint of environmental protection or effective use of limited resources, there has been an expectation for electric vehicles (EVs) that run by motors using electricity charged from outside instead of vehicles using gasoline. Is growing. As an example of a facility for charging an electric vehicle, a power conversion device has attracted attention.

  In general, the contract power is set to the largest value among the maximum demand powers of each month in the past year including the current month, and as the contract power increases, the electricity rate also increases. Here, the maximum demand power is measured every 30 minutes (also called a demand unit time), and is the largest value of the measured power in a month. Therefore, if the electric power stored in the electric vehicle is used when the electric vehicle is not used, the increase in the contract electric power can be suppressed. Therefore, a target power supply amount per unit time of demand is determined, the power stored in the battery is converted into AC by the power converter, and the power corresponding to the target power supply amount is supplied to the load connected to the power system. As a result, the power used can be reduced.

  As described above, the charging operation is performed in which the AC from the power system is converted to DC and supplied to the electric vehicle, and the DC operation is converted to AC and the converted power is supplied to the load connected to the power system. (See Patent Document 1).

JP 2014-3796 A

  FIG. 33 is an explanatory diagram showing an example of a power supply operation by a conventional power converter. In FIG. 33, the horizontal axis represents time, and D0, D1, D2, D3, D4... Are times that divide the demand unit time D (for example, 30 minutes), and are, for example, 00 minutes or 30 minutes every hour. . The vertical axis indicates the AC power output from the power converter. FIG. 33 shows a state where the power converter continuously outputs the output power Px from the time when the EV (electric vehicle) is connected. Assuming that the target power supply amount per demand unit time D is WH, the equation WH = D × Px holds, so that the output power Px = WH / D. In this case, the output power Px is smaller than the rated power.

  FIG. 34 is an explanatory diagram illustrating an example of the efficiency of the power conversion device. In FIG. 34, the horizontal axis indicates the output power during the power supply operation or the input power during the charging operation, and the vertical axis indicates the efficiency of the power converter. As shown in FIG. 34, when the output power or the input power is within the rating or a predetermined range including the rating, the efficiency becomes the best. Efficiency decreases as output power or input power decreases. That is, as can be seen from FIG. 34, when performing the power supply operation as shown in FIG. 33, the output power Px is smaller than the rated power, so that there is a problem that the power converter is used in an inefficient state. .

  As shown in FIG. 33, when an EV (electric vehicle) is connected between times D0 and D1, the power supply amount WH ′ that can be supplied between times D0 and D1 is the target power supply amount. Less than WH.

  FIG. 35 is an explanatory diagram illustrating an example of a temporal change of the power consumption of the load. In FIG. 35, the horizontal axis indicates time, which is divided every demand unit time (30 minutes). The vertical axis indicates the power consumption of the load, and the height of the bar graph indicates the power consumption of the load. A portion without a pattern in the bar graph indicates the amount of power supplied from the grid (power system), that is, the demand power for the grid, and a portion with a pattern indicates the amount of power supplied from the power converter, that is, the target power supply. . As shown in FIG. 33, when an EV is connected in the middle of the demand unit time D (in the example of FIG. 35, between 10:30 and 11:00), the target power amount is supplied in the demand unit time D. Can not.

  FIG. 36 is an explanatory diagram showing an example of a charging operation by a conventional power converter. In FIG. 36, the horizontal axis represents time, and D0, D1, D2, D3, D4... Are times that divide the demand unit time D (for example, 30 minutes). is there. The vertical axis indicates the input power Py of the power converter. To end charging in a short period of time, the power to be used, that is, the maximum demand power, is increased. Therefore, conventionally, as shown in FIG. Since the charging is performed with the maximum output charge amount within the possible range so that the charging is completed at the time, the input power Py of the power conversion device becomes smaller than the rated power, and the efficiency of the power conversion device is reduced as in the case of the power supply operation. There is a problem that the power converter is used in a bad state. In addition, since the electric vehicle remains connected until the charging end time, power consumption in a circuit or the like related to the interface between the power converter and the electric vehicle increases.

  The present invention has been made in view of such circumstances, and has as its object to provide a power conversion device capable of high-efficiency operation, a computer program for controlling the power conversion device, and a power conversion method. .

  The power conversion device according to the present invention is a power conversion device that performs at least one of a charging operation of converting AC to DC to charge a battery and a power supply operation of converting DC to AC and supplying power to a load. A control unit that starts charging or power supply, and controls to stop charging or power supply when the charge amount or power supply amount reaches a target charge amount or target power supply amount per predetermined cycle; It is characterized in that control is performed so that charging or power feeding is repeated in a cycle.

  A computer program according to the present invention controls a power converter that performs at least one of a charging operation of converting a direct current to a direct current to charge a battery and a power supply operation of converting a direct current to alternating current and supplying power to a load. Control the computer to start charging or power supply with predetermined power and stop charging or power supply when the charge amount or power supply amount reaches the target charge amount or target power supply amount per predetermined cycle. The control unit functions as a control unit, and the control unit controls to repeat charging or power supply at the predetermined cycle.

  The power conversion method according to the present invention is a power conversion method by a power conversion device that performs at least one of a charging operation of converting a direct current into a direct current and charging a battery and a power supply operation of converting a direct current into alternating current and supplying power to a load. Starting charging or power supply with a predetermined power, and, if the charge amount or the power supply amount reaches a target charge amount or a target power supply amount per a predetermined cycle, the control unit controls to stop charging or power supply, The control unit controls to repeat charging or power supply at the predetermined cycle.

  In the present invention, the control unit starts charging or power supply with predetermined power, and stops charging or power supply when the charge amount or power supply amount reaches the target charge amount or target power supply amount per predetermined cycle. Control. Then, the control unit controls to repeat charging or power supply at a predetermined cycle. The predetermined power is rated power or power within a predetermined range including the rated power. In addition, in order to operate the power control device efficiently, it is also possible to set the output power to be suppressed in consideration of the power and the like required for a countermeasure for heat generation accompanying the operation. The predetermined cycle is, for example, a demand unit time or a time corresponding to the demand unit time, and is, for example, 30 minutes.

  That is, the control unit performs charging or power supply with the predetermined power so as to reach the target charge amount or the target power supply amount within the demand unit time, so that the operation can be performed with high efficiency. Further, when the target charge amount is reached in the middle of the demand unit time, the charging is stopped for the remaining time of the demand unit time, so that the connection between the power conversion device and the electric vehicle can be cut off, and a circuit related to the interface can be provided. And the like can reduce power consumption.

  Further, even when the electric vehicle is connected to the power converter in the middle of the demand unit time, the control unit starts charging or supplying power with predetermined power (greater than the power during operation of the conventional power converter). Therefore, there is a high possibility that the target charge amount or the target power supply amount is reached within the demand unit time. Also, even when the electric vehicle is disconnected from the power converter in the middle of the demand unit time, the control unit starts charging with predetermined power (greater than the power during operation of the conventional power converter). The charge amount of the battery of the electric vehicle can be slightly increased.

  In the power converter according to the present invention, when the charging amount or the supplied amount does not reach the target charged amount or the target supplied amount within an arbitrary predetermined period, the control unit may perform charging or charging up to a predetermined period next to the predetermined period. Power supply is continued.

  In the present invention, when the charge amount or the power supply amount does not reach the target charge amount or the target power supply amount within an arbitrary predetermined period, the control unit continues the charging or the power supply until a predetermined period next to the predetermined period. That is, if the target charging amount or the target power supply amount is not reached within the demand unit time, the control unit does not stop charging or power supply in the middle of the demand unit time and continues charging or charging until the demand unit time ends. Continue power supply. Thereby, even when the electric vehicle is connected to the power converter in the middle of the demand unit time, it is possible to increase the possibility of reaching the target charge amount or the target power supply amount within the demand unit time.

  The power conversion device according to the present invention includes a power consumption acquisition unit that acquires the power consumption of the load, and the control unit is configured to control the power consumption according to the power consumption acquired by the power consumption acquisition unit within an arbitrary predetermined cycle. , Characterized in that control is performed to adjust the power supply start point in the predetermined cycle.

  According to the present invention, the power consumption acquiring unit acquires the power consumption of the load. The power consumption of the load can be obtained for each demand unit time (predetermined cycle). For example, the power consumption can be obtained from the start of the demand unit time and reset at the end of the demand unit time. it can. The control unit controls to adjust the power supply start point in the predetermined cycle according to the power consumption acquired by the power consumption acquisition unit in an arbitrary predetermined cycle. The amount of power consumption may be, for example, a cumulative value of power consumption after the start of an arbitrary demand unit time, or a temporal change (degree of increase or decrease) of power consumption after the start of an arbitrary demand unit time. .

  For example, when the power consumption in the demand unit time exceeds the contract power amount, the control unit adjusts the power supply start time point so that the target power supply amount can be supplied within the demand unit time. When the power consumption in the demand unit time is small, the control unit does not supply the power in the demand unit time, that is, can shift the power supply start time to the next demand unit time or later. Further, when the power consumption suddenly increases in the middle of the demand unit time and there is a possibility that the power consumption may exceed the contracted power amount, the control unit may control the power consumption in the middle of the demand unit time (at least the power consumption becomes equal to the contracted power amount) At the point in time). As a result, it is possible to prevent power supply during a time period when the power demand is low while measuring the power demand, and it is possible to prevent the power of the battery of the electric vehicle from being wasted.

  In the power conversion device according to the present invention, the control unit controls to adjust a charging period in the predetermined cycle according to a degree of power consumption obtained by the power consumption obtaining unit in an arbitrary predetermined cycle. It is characterized by.

  According to the present invention, the control unit controls to adjust the charging period in the predetermined cycle in accordance with the power consumption acquired by the power consumption acquiring unit in an arbitrary predetermined cycle. For example, the control unit stops charging when the power consumption in the demand unit time is increasing at a rate exceeding (contracted power amount-target charging amount). Further, the control unit can also restart charging when the power consumption decreases in the middle of the demand unit time and the power consumption falls below the (contracted power amount-target charging amount). As a result, it is possible to prevent charging in a time zone where the power demand is high while measuring the power demand, and it is possible to prevent the contract power from increasing beforehand.

  The power conversion device according to the present invention includes a power supply time calculation unit that calculates a power supply time per the predetermined cycle based on a power supply amount to supply power to the load and the target power supply amount, and the control unit includes an arbitrary predetermined period. The control is performed so that the power supply is stopped when the power supply time elapses from the power supply start time.

  In the present invention, the power supply time calculation unit calculates the power supply time per predetermined cycle based on the power supply amount to supply power to the load and the target power supply amount. The amount of power supplied to the load is the output power (power amount) of the power converter. Assuming that the output power is Pout and the target power supply amount is WH, the power supply time T per demand unit time (predetermined cycle) can be calculated by T = WH / Pout. The control unit controls the power supply to be stopped when the power supply time elapses from the power supply start time or at the time when the target power supply amount is reached within an arbitrary predetermined cycle. As a result, it is possible to supply the target power supply amount within the demand unit time while supplying power with the most efficient output.

  The power conversion device according to the present invention includes a charge acquisition unit that acquires a required charge amount and a charge end time of the battery, and the target charge amount based on the required charge amount and the charge end time acquired by the charge acquisition unit. And a target charge amount calculating unit for calculating.

  According to the present invention, the charge acquisition unit acquires the required charge amount of the battery and the charging end point. The required charge amount of the battery is, for example, the charge amount (kWh) until the end of driving, and is calculated by the following formula: total battery capacity (kWh) × charge end capacity (%) − remaining battery capacity (kWh) of the electric vehicle. be able to. The required charge amount of the battery can be received and acquired from the electric vehicle. In the case of a vehicle for which the total battery capacity has not been transmitted, the catalog value of the vehicle can be recorded in the memory of the control unit and used instead. The charging end point can be obtained from parameters set in the power converter in advance. The target charge amount calculation unit calculates a target charge amount based on the acquired required charge amount and the end time of charging. The target charge amount can be calculated by the required charge amount (the charge amount until the end of the operation) / (the number of demand unit times elapsed until the end of the charge minus one). However, if the number of demand unit times that elapse until the end of charging is 1, the target amount of charge is the amount of charge until the end of operation. Thereby, the target charge amount per demand unit time can be obtained.

  The power conversion device according to the present invention is characterized in that the target charge amount calculation unit calculates a target charge amount each time the predetermined cycle occurs.

  According to the present invention, the target charge amount calculation unit calculates the target charge amount every predetermined cycle. For example, the target charge amount calculation unit calculates the target charge amount at the start of the demand unit time or at the time when the electric vehicle is connected to the power converter. Thus, even when the state of charge of the battery changes each time the demand unit time elapses, an accurate target charge amount can be calculated according to the state of the battery at the start of the demand unit time.

  The power conversion device according to the present invention includes a temperature detection unit that detects a temperature at a predetermined location, and the control unit is configured to control a case where the temperature detected by the temperature detection unit becomes equal to or higher than an upper limit value during a charging operation or a power supply operation. Controlling the charging or power supply to stop, and when the temperature detected by the temperature detection unit is lower than or equal to the lower limit value during the stop of the charging operation or the power supply operation, control is performed to restart the charging or power supply. I do.

  In the present invention, the temperature detecting section detects the temperature at a predetermined location. As the temperature detecting unit, for example, a temperature sensor can be used. The predetermined location may be, for example, an electric component or an electronic component that becomes relatively hot during a charging operation or a power supply operation, or a periphery of the electric component or the electronic component. The control unit controls to stop charging or power supply when the temperature detected by the temperature detection unit during the charging operation or the power supply operation is equal to or higher than the upper limit value. When the detected temperature falls below the lower limit, control is performed to restart charging or power supply. The upper limit value may be, for example, a temperature at which cooling is required by operating a fan. Thus, the fan can be operated intermittently without operating at all times, the power consumption of the fan can be suppressed, and the power consumption during the charging operation or the power supply operation can be reduced.

  The power converter according to the present invention is characterized in that the control unit sets a time that divides a unit time zone for determining contract power or a time that is a predetermined time before the time as a start time of the predetermined cycle.

  The control unit sets a time that divides the unit time zone for determining the contract power or a time that is a predetermined time before the time as a start time of the predetermined cycle. The unit time zone for determining the contract power is, for example, a demand unit time zone. The time that divides the unit time zone is 00 minutes or 30 minutes every hour. That is, the control unit sets 00 minutes and 30 minutes each hour as the start time of the predetermined cycle. Further, the control unit can also set the time that is a predetermined time before 00 minutes each hour and the time that is a predetermined time before 30 minutes each hour as the start time of the predetermined cycle. Thereby, charging or power supply can be controlled for each time zone for determining the contract power.

  In the power conversion device according to the present invention, the control unit may determine a time at which a plurality of unit time periods for determining the contract power are consecutively divided or a time before the time by a predetermined time before the start time of the predetermined period. It is characterized by the following.

  The control unit sets, as the start time of the predetermined cycle, a time that divides a plurality of unit time zones for determining the contract power, or a time that is a predetermined time before the time. The time zone in which a plurality of unit time zones are continuously collected is a time zone in which two continuous unit time zones are collected. Assuming that the time that divides the unit time zone for determining the contract power is 0:00, the start time of the predetermined cycle is 0:00. Alternatively, the start time of the predetermined cycle may be set to a time that is a predetermined time earlier than every hour. This can reduce the number of times the operation starts and stops when performing the charging or power supply operation.

  The power conversion device according to the present invention includes a determination unit that determines the presence or absence of connection with a vehicle equipped with the battery, and the control unit charges at the predetermined cycle after the determination unit determines that the vehicle is connected. Alternatively, the power supply is controlled so as to be repeated.

  The determination unit determines whether or not there is a connection with a vehicle equipped with a battery. For example, the determining unit determines whether the charging connector is connected to a vehicle (electric vehicle). The control unit controls to repeat charging or power supply at a predetermined cycle after the determination unit determines that the vehicle is connected. This suffices to provide a timer instead of a clock, and the configuration can be simplified.

  According to the present invention, highly efficient operation is possible.

2 is a block diagram illustrating an example of a configuration of a power conversion device according to the present embodiment. FIG. 3 is an explanatory diagram illustrating a first example of a power supply operation performed by the power conversion device of the present embodiment. 5 is a flowchart illustrating a processing procedure of a first example of a power supply operation performed by the power converter according to the present embodiment. 5 is a flowchart illustrating a processing procedure of a first example of a power supply operation performed by the power converter according to the present embodiment. FIG. 9 is an explanatory diagram illustrating a second example of the power supply operation performed by the power conversion device of the present embodiment. FIG. 11 is an explanatory diagram illustrating a third example of the power supply operation performed by the power conversion device of the present embodiment. FIG. 13 is an explanatory diagram illustrating a fourth example of the power supply operation performed by the power conversion device of the present embodiment. It is a flowchart which shows the processing procedure of the 4th Example of the electric power feeding operation by the power converter of this Embodiment. It is a flowchart which shows the processing procedure of the 4th Example of the electric power feeding operation by the power converter of this Embodiment. FIG. 13 is an explanatory diagram illustrating a fifth example of the power supply operation performed by the power conversion device of the present embodiment. It is a flow chart which shows the processing procedure of the 5th example of the feeding operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 5th example of the feeding operation by the power converter of this embodiment. FIG. 14 is an explanatory diagram illustrating a sixth example of the power supply operation performed by the power conversion device of the present embodiment. It is a flowchart which shows the processing procedure of the 6th Example of the electric power feeding operation by the power converter of this Embodiment. It is a flowchart which shows the processing procedure of the 6th Example of the electric power feeding operation by the power converter of this Embodiment. FIG. 4 is an explanatory diagram illustrating a first example of a charging operation performed by the power converter according to the present embodiment. 5 is a flowchart illustrating a processing procedure of a first example of a charging operation performed by the power conversion device of the present embodiment. 5 is a flowchart illustrating a processing procedure of a first example of a charging operation performed by the power conversion device of the present embodiment. It is an explanatory view showing a second example of the charging operation by the power converter of the present embodiment. It is a flow chart which shows the processing procedure of the 2nd example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 2nd example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 2nd example of the charge operation by the power converter of this embodiment. It is an explanatory view showing the 3rd example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 3rd example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 3rd example of the charge operation by the power converter of this embodiment. It is an explanatory view showing a fourth example of the charging operation by the power converter of the present embodiment. It is a flow chart which shows the processing procedure of the 4th example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 4th example of the charge operation by the power converter of this embodiment. It is an explanatory view showing a fifth example of the charging operation by the power converter of the present embodiment. It is a flow chart which shows the processing procedure of the 5th example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 5th example of the charge operation by the power converter of this embodiment. It is a flow chart which shows the processing procedure of the 5th example of the charge operation by the power converter of this embodiment. It is an explanatory view showing an example of a power supply operation by a conventional power converter. FIG. 4 is an explanatory diagram illustrating an example of the efficiency of the power conversion device. FIG. 4 is an explanatory diagram illustrating an example of a temporal change in the power consumption of a load. It is an explanatory view showing an example of a charging operation by a conventional power converter.

  Hereinafter, the present invention will be described with reference to the drawings showing an embodiment. FIG. 1 is a block diagram illustrating an example of a configuration of a power conversion device 100 according to the present embodiment. In FIG. 1, reference numeral 1 denotes a power system, for example, including a commercial power supply of AC 100V or 200V. The power of the power system 1 is supplied to each of the loads 301, 302, 303 (for example, power, lighting, etc.) via the distribution board 200. The distribution board 200 includes a main breaker 201 and branch breakers 203, 204, and 205 for branching power to respective loads. In addition, the distribution board 200 includes a branch breaker 202 for branching power to the power converter 100. Thereby, the electric power from the electric power system 1 is supplied to the electric power converter 100. In addition, the number of power systems, the number of loads, and the number of distribution boards are not limited to the example of FIG.

  The power conversion device 100 includes an AC / DC conversion circuit 10, a control unit (CPU) 20, an interface unit 31, a clock 32, an operation unit 33, a communication unit 34, a fan 35, a temperature detection unit 36, and the like. The control unit 20 includes a power supply time calculation unit 21, a target charge amount calculation unit 22, a determination unit 23, and the like.

  The power conversion device 100 includes a relay 11 on the power system 1 side of the AC / DC conversion circuit 10 and a relay 12 on the electric vehicle 50 (EV: Electric Vehicle) side of the AC / DC conversion circuit 10. The electric vehicle 50 has a battery 52 mounted thereon, and the power converter 100 and the electric vehicle 50 can be connected by the charging connector 51.

  The AC / DC conversion circuit 10 includes a bidirectional inverter that converts DC into AC and converts AC into DC. Note that, in addition to the inverter, a transformer, a DC / DC converter, and the like may be provided as necessary. The AC / DC conversion circuit 10 may have any configuration as long as it can convert DC to AC and convert AC to DC.

  The power conversion device 100 performs a charging operation for charging the battery 52 by converting AC from the power system 1 into DC with the AC / DC conversion circuit 10 and outputting the converted power to the electric vehicle 50. The power conversion device 100 converts a direct current from the battery 52 mounted on the electric vehicle 50 into an alternating current by the AC / DC conversion circuit 10, and supplies the converted power to the loads 301, 302, and 303. I do. When the power conversion device 100 performs the power supply operation, not only a configuration in which the power of the battery 52 of the electric vehicle 50 is converted into an alternating current to supply the power, but also a configuration in which the power from a DC power source such as a solar cell is converted into an AC. It is also possible to adopt a configuration in which power is supplied through

  The power conversion device 100 closes the relays 11 and 12 under the control of the control unit 20 when starting the charging operation or the power supply operation, and opens the relays 11 and 12 when stopping the charge operation or the power supply operation.

  A power meter 210 is connected to a power line near the main breaker 201 of the distribution board 200, and can measure power consumed by the loads 301, 302, and 303. A power meter 211 is connected to a power line near the relay 11 of the power converter 100. The power meter 211 can measure the output power when the power conversion device 100 performs the power supply operation, and can measure the input power when the power conversion device 100 performs the charge operation. The power measured by the wattmeters 210 and 211 is output to the interface unit 31.

  The interface unit 31 has a function as a power consumption acquisition unit, and acquires the power consumption of the loads 301, 302, and 303.

  The control unit 20 controls the AC / DC conversion circuit 10 to start charging or power supply with a predetermined power. When the charge amount or the power supply amount reaches a target charge amount or a target power supply amount per a predetermined cycle, the charging or power supply is performed. Is controlled to stop. Then, the control unit 20 controls to repeat charging or power feeding at a predetermined cycle. The predetermined power is rated power or power within a predetermined range including the rated power. For example, the rated output power can be set when the power conversion device 100 performs the power supply operation, and the rated input power can be set when the power conversion device 100 performs the charge operation. The rating can include a predetermined range including the rating value. In addition, in order to operate the power control device efficiently, it is also possible to set the output power to be suppressed in consideration of the power and the like required for a countermeasure for heat generation accompanying the operation. The predetermined cycle is, for example, a demand unit time or a time corresponding to the demand unit time, for example, 30 minutes.

  The communication unit 34 can transmit and receive information to and from the electric vehicle 50 by power line communication or other communication means. For example, the communication unit 34 has a function as a charge acquisition unit, and can acquire a required charge amount of the battery 52, a charging end time, and the like.

  The operation unit 33 includes an operation panel, a display panel, and the like, and can operate the power conversion device 100 by operating the operation unit 33.

  Fan 35 cools the inside of a housing (not shown) that houses power conversion device 100.

  The temperature detector 36 detects the temperature at a predetermined location. As the temperature detection unit 36, for example, a temperature sensor can be used. The predetermined location may be, for example, an electric component or an electronic component that becomes relatively hot during a charging operation or a power supply operation, or a periphery of the electric component or the electronic component.

  The power supply time calculation unit 21 calculates a power supply time per predetermined cycle based on a power supply amount to supply power to the load and a target power supply amount. The amount of power supplied to the load is the output power (power amount) of the power conversion device 100. Assuming that the output power is Pout and the target power supply amount is WH, the power supply time T per demand unit time (predetermined cycle) can be calculated by T = WH / Pout.

  The target charge amount calculation unit 22 calculates a target charge amount based on the required charge amount of the battery 52 acquired via the communication unit 34 and the charging end time set by the power conversion device 100. The required charge amount of the battery 52 is, for example, the charge amount (kWh) until the end of driving, and is obtained by (total battery capacity of the electric vehicle 50 (kWh) × charge end capacity (%) − remaining battery capacity of the electric vehicle (kWh)). Can be calculated. Note that the required charge amount of the battery 52 can be received and acquired from the electric vehicle 50 side. In the case of a vehicle for which the total battery capacity is not transmitted, the catalog value of the vehicle can be recorded in the memory of the control unit 20 and used instead. The charging end point can be obtained from parameters set in the power conversion device 100 in advance. The target charge amount can be calculated by the required charge amount of the battery 52 (the charge amount until the end of the operation) / (the number of demand unit times elapsed until the end of the charge minus one). However, if the number of demand unit times that elapse until the end of charging is 1, the target amount of charge is the amount of charge until the end of operation. Thereby, the target charge amount per demand unit time can be obtained.

  Further, the target charge amount calculation unit 22 calculates the target charge amount each time a predetermined cycle occurs. For example, the target charge amount calculator 22 calculates the target charge amount at the start of the demand unit time or at the time when the electric vehicle 50 is connected to the power conversion device 100. Thus, even when the charge state of the battery 52 changes each time the demand unit time elapses, an accurate target charge amount can be calculated according to the state of the battery 52 at the start of the demand unit time.

  The determination unit 23 determines whether or not there is a connection with a vehicle on which the battery 52 is mounted. For example, the determination unit 23 determines whether the charging connector 51 is connected to the electric vehicle 50.

  Next, the operation of power conversion device 100 of the present embodiment will be described. First, the power supply operation will be described.

  FIG. 2 is an explanatory diagram illustrating a first example of the power supply operation performed by the power conversion device 100 according to the present embodiment. In FIG. 2, the horizontal axis represents time, and D0, D1, D2, D3, D4... Are times that divide a demand unit time D (for example, 30 minutes) corresponding to an example of a predetermined cycle. 00 minutes or 30 minutes. The vertical axis indicates the power output by the power conversion device 100.

  It is also assumed that the target power supply amount WH per demand unit time is set in advance. The target power supply amount WH is set, for example, in the power system 1 such that the power amount used in 30-minute units does not exceed the contract power amount in a time zone when the power consumption of the loads 301, 302, and 303 increases. In cooperation with the above, the power conversion apparatus 100 can set the power to be supplied to the loads 301, 302, and 303 per unit of demand time. The target power supply amount WH can be set from, for example, the operation unit 33, and can be stored by the control unit 20 in a memory (not shown).

  As shown in FIG. 2, when an EV (electric vehicle 50) is connected halfway between times D0 and D1, power supply is started at the most efficient output Pout at the time of connection with the EV, and the demand unit time ( If the target power supply amount WH is reached during D0 to D1), power supply is stopped. In this case, the power supply time T within the demand unit time can be calculated by the equation T = WH / Pout. Note that, when D1 is reached before reaching the target power supply amount WH (when the next demand unit time (D1 to D2) starts), power supply can be continued without stopping.

  At the start of the time D1, power supply is started at the output Pout, and when the target power supply amount WH is reached during the demand unit time (D0 to D1), power supply is stopped. Also in this case, the power supply time T within the demand unit time is T = WH / Pout. Thereafter, the same operation is repeated.

  When the charge capacity of the EV battery 52 reaches the discharge lower limit battery remaining capacity, reaches the power supply end capacity set by the power conversion device 100, or reaches the power supply end time, the control unit 20 supplies power. To stop. The discharge lower limit battery remaining capacity can be acquired from the electric vehicle 50 via the communication unit 34, for example. The power supply end time can be set and stored in advance as a time at which the peak of the power demand at the loads 301, 302, and 303 ends.

  FIGS. 3 and 4 are flowcharts showing the processing procedure of the first example of the power supply operation by the power converter 100 of the present embodiment. In the following, for the sake of simplicity, the processing will be described as the control unit 20. When the charging connector 51 is connected (S11) and a start button (not shown) for starting the power supply operation is turned on (S12), the control unit 20 determines whether the power supply time T is 30 minutes or less. A determination is made (S13). The power supply time T can be obtained by the equation T = WH / Pout. In addition, when the power supply start time is set in advance, it may be configured to wait until the power supply start time comes. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S12 is unnecessary.

  When power supply time T is 30 minutes or less (YES in S13), control unit 20 waits for operation (S14). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not any of the conditions of the power supply end time or the stop button has been turned on is satisfied (S15), and if none of the conditions is satisfied (NO in S15), the EV. Is the first connection time or the start time of the next demand unit time is determined (S16).

  When any one of the conditions is satisfied (YES in S16), the control unit 20 performs the power supply operation at the output Pout (S17). If none of the conditions is satisfied (NO in S16), the control unit 20 continues the processing from step S14. The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S18).

  If none of the conditions is satisfied (NO in S18), the control unit 20 determines whether or not the target power supply amount has been reached in demand unit time (S19), and if the target power supply amount has been reached (YES in S19). If the target power supply amount has not been reached (NO in S19), the processing after step S17 is continued.

  If any of the conditions is satisfied in step S15 (YES in S15), or if any of the conditions is satisfied in step S18 (YES in S18), control unit 20 stops the operation (S20) and charges the battery. When the connector 51 is disconnected (S21), the process ends.

  When the power supply time T is not shorter than 30 minutes (NO in S13), the control unit 20 performs the rated power supply operation at the output Pout (S22). The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S23).

  If none of the conditions is satisfied (NO in S23), control unit 20 performs the process of step S22, and if any of the conditions is satisfied (YES in S23), stops the operation (S24), and proceeds to charge connector 51. Is removed (S25), the process ends.

  As described above, the control unit 20 supplies power at a predetermined power (for example, rated power having the highest efficiency) so as to reach the target power supply amount within the demand unit time, so that high-efficiency operation is possible. . Further, even when electric vehicle 50 is connected to power conversion device 100 in the middle of the demand unit time, control unit 20 supplies power with predetermined power (larger than the power during operation of the conventional power conversion device). Since the start, the possibility of reaching the target power supply amount within the demand unit time is increased. Further, even when electric vehicle 50 is disconnected from power conversion device 100 in the middle of the demand unit time, control unit 20 starts charging with predetermined power (greater than power during operation of the conventional power conversion device). Therefore, the charge amount of the battery 52 of the electric vehicle 50 can be slightly increased.

  Further, when the power supply amount does not reach the target power supply amount within an arbitrary predetermined period, the control unit 20 continues power supply until a predetermined period next to the predetermined period. That is, when the target power supply amount is not reached within the demand unit time, the control unit 20 continues power supply until the demand unit time ends without stopping power supply in the middle of the demand unit time. Thereby, even when the electric vehicle 50 is connected to the power converter 100 in the middle of the demand unit time, it is possible to increase the possibility of reaching the target power supply amount in the demand unit time.

  FIG. 5 is an explanatory diagram illustrating a second example of the power supply operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. In the second embodiment, it is assumed that the contract power has been given in advance. The contract power is, for example, the largest value among the maximum demand powers of each month in the past year including the current month. As the contract power increases, the electricity rate also increases. Here, the maximum demand power is measured every 0 to 30 minutes and every 30 minutes to 60 minutes (also referred to as demand unit time) of the used power, and is the largest value of the measured power in a month. .

  The interface unit 31 acquires the power consumption of the loads 301, 302, and 303. The power consumption of the load can be obtained for each demand unit time (predetermined cycle). For example, the power consumption can be obtained from the start of the demand unit time and reset at the end of the demand unit time. it can. The control unit 20 controls to adjust the power supply start time point in the predetermined cycle according to the power consumption acquired by the interface unit 31 in an arbitrary predetermined cycle. The amount of power consumption may be, for example, a cumulative value of power consumption after the start of an arbitrary demand unit time, or a temporal change (degree of increase or decrease) of power consumption after the start of an arbitrary demand unit time. .

  For example, as shown in FIG. 5, when an EV (electric vehicle 50) is connected halfway between times D0 and D1, the amount of power consumption from the start time D0 of the demand unit time (D0 to D1) is contracted. If it is determined that the power is increasing at a pace exceeding the amount of power, the power supply is started from the time before the power supply time T before the start time of the time D1, and the power supply is stopped at the time D1. In this case, the power supply time T can be expressed as T = WH / Pout. When the difference between the EV connection time and the time D1 is shorter than the power supply time T, the power supply capacity is smaller than WH.

  Further, at time D1, the acquired power consumption is reset once, the power consumption is acquired from time D1, and when it is determined that the power consumption from time D1 is increasing at a pace exceeding the contracted power, time D2 , The power supply is started from the point in time before the power supply time T before the start time, and the power supply is stopped at time D2.

  Further, at time D2, the acquired power consumption is reset once, the power consumption is acquired from time D2, and when it is determined that the power consumption from time D2 does not exceed the contracted power, the demand unit time (D2 to D3 ) Is not supplied.

  In addition, at time D3, the acquired power consumption is reset once, and power consumption is acquired from time D3. After time D3, the power consumption was initially lower than the contracted power, but suddenly on the way. If it is determined that the power consumption changes and the pace exceeds the contracted electric energy, the demand unit time (D3 to D4) starts in the middle (for example, at the time when the power consumption becomes equal to the contracted power or as soon as possible) (FIG. 5). In the example of (1), power can also be supplied (time point before time D4 by time T1). In this case, T1 <T.

  When the charge capacity of the EV battery 52 reaches the discharge lower limit battery remaining capacity, reaches the power supply end capacity set by the power conversion device 100, or reaches the power supply end time, the control unit 20 supplies power. To stop.

  As described above, when the power consumption in the demand unit time increases at a pace exceeding the contract power amount, the control unit 20 adjusts the power supply start time point so that the target power supply amount can be supplied within the demand unit time. . Further, when the power consumption in the demand unit time is lower than the contract power amount, the control unit 20 does not supply the power in the demand unit time, that is, shifts the power supply start time to the next demand unit time or later. be able to. Further, when the power consumption suddenly increases in the middle of the demand unit time and there is a possibility that the power consumption may exceed the contracted power amount, the control unit 20 determines that the power consumption amount is at least halfway in the demand unit time (at least the power consumption amount becomes equal to the contracted power amount) At the point in time). Thus, it is possible to prevent power supply in a time period when the power demand is low while measuring the power demand, and it is possible to prevent the power of the battery 52 of the electric vehicle 50 from being wasted.

  FIG. 6 is an explanatory diagram illustrating a third example of the power supply operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. As shown in FIG. 6, when an EV (electric vehicle 50) is connected halfway between times D0 and D1, control unit 20 controls time T / 2 that is １ ／ of power supply time T from the time of connection. During the period, the power supply is performed with the most efficient output Pout, and when the time T / 2 has elapsed, the power supply is stopped and the operation stands by. If it is determined that the power consumption from the start time D0 of the demand unit time (D0 to D1) is increasing at a pace exceeding the contracted power, the time T / 2 before the start time of the time D1 Then, power supply is started with the most efficient output Pout.

  During the time T / 2 from the start time D1 of the demand unit time (D1 to D2), power is supplied with the most efficient output Pout, and when the time T / 2 has elapsed, the power supply is stopped and the operation is on standby. When it is determined that the power consumption from the start time D1 of the demand unit time (D1 to D2) is increasing at a pace exceeding the contracted power, the time point T / 2 before the start time of the time D2 Then, power supply is started with the most efficient output Pout.

  During the time T / 2 from the start time D2 of the demand unit time (D2 to D3), power is supplied with the most efficient output Pout, and when the time T / 2 has elapsed, the power supply is stopped and the operation stands by. When it is determined that the power consumption from the start time D1 of the demand unit time (D2 to D3) does not exceed the contract power, the power supply start time is delayed until time D3.

  During the time T / 2 from the start time D3 of the demand unit time (D3 to D4), power is supplied at the most efficient output Pout, and when the time T / 2 has elapsed, the power supply is stopped and the operation is on standby. Further, after time D3, when it is determined that the power consumption is initially lower than the contracted electric energy but suddenly changes in the middle and becomes a pace exceeding the contracted electric power, the demand unit time (D3 to D4) ) (For example, at the time point when the power consumption becomes equal to the contracted power amount or as soon as possible before the time point) (in the example of FIG. 6, the time point before the time D4 by the time T2). . In this case, T2 <T / 2.

  As described above, in the third embodiment, similarly to the second embodiment, it is possible to measure power demand and not to supply power during a time period when power demand is low. Power can be prevented from being wasted. Further, since power is supplied during the time T / 2 after the start of the demand unit time, even if the electric vehicle is disconnected in the middle of the demand unit time, the second embodiment does not change the frequency of driving on / off. In comparison with the case where the vehicle is disconnected from the electric vehicle on the way, there is a high possibility that power can be supplied even during a unit time of demand.

  FIG. 7 is an explanatory diagram illustrating a fourth example of the power supply operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. As shown in FIG. 7, when an EV (electric vehicle 50) is connected halfway between times D0 and D1, the control unit 20 waits for driving and starts the demand unit time (D1 to D2). Power supply is started at the most efficient output Pout from the time before the time T before D1, and is continued until the end time of the demand unit time (D0 to D1) (that is, time D1). In this case, the power supply time T can be expressed as T = WH / Pout. WH is a target power supply amount per demand unit time.

  The control unit 20 continues the power supply operation even after the time D1, stops the power supply when the time T has elapsed from the time D1, and waits for the operation.

  Even if the next demand unit time (D2 to D3) is entered, the control unit 20 continues to wait for the operation, and is most efficient from the time before the start time D3 of the demand unit time (D3 to D4) by the time T. Power supply is started at the output Pout, and power supply is continued until the end time of the demand unit time (D2 to D3) (that is, time D3).

  The control unit 20 continues the power supply operation even after the time D3, stops the power supply when the time T has elapsed from the time D3, and waits for the operation. The control unit 20 thereafter repeats the same control.

  FIG. 8 and FIG. 9 are flowcharts showing the processing procedure of the fourth example of the power supply operation by the power converter 100 of the present embodiment. When the charging connector 51 is connected (S31) and a start button for starting the power supply operation is turned on (S32), the controller 20 sets 0 to a variable n (S33), and the power supply time T is 30 minutes. It is determined whether or not it is below (S34). The power supply time T can be obtained by the equation T = WH / Pout. In addition, when the power supply start time is set in advance, it may be configured to wait until the power supply start time comes. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S32 is unnecessary.

  When power supply time T is 30 minutes or less (YES in S34), control unit 20 waits for operation (S35). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not the current time is 00 minutes each hour or 30 minutes each hour (S36). If the current time is 00 minutes or 30 minutes each hour (YES in S36), the control unit 20 sets the variable n to 1 is added (S37), and the process of step S38 described later is performed. If it is not 00 minutes or 30 minutes each hour (NO in S36), the control unit 20 determines whether the power supply end time has been reached or the stop button has been turned on (S38). .

  If none of the conditions is satisfied (NO in S38), the control unit 20 determines whether or not the condition that the variable n is an even number and the current time ≧ {D (n + 1) -T} is satisfied (S39). If the condition is not satisfied (NO in S39), the processing after step S35 is performed. When the condition is satisfied (YES in S39), the control unit 20 performs the power supply operation at the output Pout (S40).

  The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S41). If none of the conditions is satisfied (NO in S41), the control unit determines whether the current time is {D (n + 1) + T} (S42).

  If the current time is {D (n + 1) + T} (YES in S42), control unit 20 continues the processing from step S35, and if the current time is not {D (n + 1) + T} (NO in S42), The processing after step S40 is continued.

  When any of the conditions is satisfied in step S38 (YES in S38), or when any of the conditions is satisfied in step S41 (YES in S41), the control unit 20 stops the operation (S43) and charges the battery. When the connector 51 is disconnected (S44), the process ends.

  If the power supply time T is not shorter than 30 minutes (NO in S34), the control unit 20 performs the rated power supply operation at the output Pout (S45). The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied (S46).

  If none of the conditions is satisfied (NO in S46), control unit 20 performs the process of step S45, and if any of the conditions is satisfied (YES in S46), stops the operation (S47), and proceeds to charge connector 51. Is removed (S48), the process ends.

  As described above, in the fourth embodiment, the control unit 20 determines the time when a plurality of demand unit time zones for determining the contract power are successively grouped (D1, D3 in the example of FIG. 7). ), A time before a predetermined time (power supply time T in the example of FIG. 7) is set as a start time of the predetermined cycle. The time zone in which a plurality of demand unit time zones are continuously collected is a time zone in which two continuous demand unit time zones are collected. This makes it possible to reduce the number of times the operation is started and stopped when the power supply operation is performed. For example, since the number of times the relays 11 and 12 are driven can be reduced, the life of the relays 11 and 12 can be extended.

  FIG. 10 is an explanatory diagram illustrating a fifth example of the power supply operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. In the fifth embodiment, the control unit 20 controls the power supply to be repeated at a predetermined cycle after the determination unit 23 determines that the vehicle (EV) is connected.

  As shown in FIG. 10, when an EV is connected in the middle of the demand unit time (D0 to D1), the control unit 20 starts power supply with the most efficient output Pout at the time of connection with the EV, and sets a timer. Activate. Thereafter, when the power supply amount reaches the target power supply amount WH, the control unit 20 stops the power supply and stands by for operation.

  At a point in time when 30 minutes (predetermined cycle) has elapsed from the point of connection with the EV, the control unit 20 starts power supply with the output Pout and restarts the timer. Thereafter, when the power supply amount reaches the target power supply amount WH, the control unit 20 stops the power supply and stands by for operation. Thereafter, the same control is repeated.

  FIG. 11 and FIG. 12 are flowcharts illustrating the processing procedure of the fifth example of the power supply operation by the power converter 100 of the present embodiment. When the charging connector 51 is connected (S51) and the start button for starting the power supply operation is turned on (S52), the control unit 20 determines whether the power supply time T is 30 minutes or less (S53). ). The power supply time T can be obtained by the equation T = WH / Pout. In addition, when the power supply start time is set in advance, it may be configured to wait until the power supply start time comes. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S52 is unnecessary.

  When the power supply time T is 30 minutes or less (YES in S53), the control unit 20 waits for operation (S54). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether one of the conditions of the power supply end time or the stop button being turned on is satisfied (S55), and if none of the conditions is satisfied (NO in S55), the EV. It is determined whether one of the conditions is satisfied at the time of the initial connection or 30 minutes have elapsed since the start of the previous operation (S56).

  When any one of the conditions is satisfied (YES in S56), the control unit 20 performs the power supply operation at the output Pout (S57). If none of the conditions is satisfied (NO in S56), the control unit 20 continues the processing from step S54. The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S58).

  If none of the conditions is satisfied (NO in S58), the control unit 20 determines whether or not the target power supply amount has been reached in demand unit time (S59), and if the target power supply amount has been reached (YES in S59). If the target power supply amount has not been reached (NO in S59), the processing after step S57 is continued.

  When any of the conditions is satisfied in step S55 (YES in S55), or when any of the conditions is satisfied in step S58 (YES in S58), control unit 20 stops the operation (S60) and charges the battery. When the connector 51 is disconnected (S61), the process ends.

  When the power supply time T is not shorter than 30 minutes (NO in S53), the control unit 20 performs the rated power supply operation at the output Pout (S62). The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S63).

  If none of the conditions is satisfied (NO in S63), control unit 20 performs the process of step S62, and if any of the conditions is satisfied (YES in S63), stops the operation (S64) and causes charging connector 51 to operate. Is removed (S65), the process ends.

  As described above, in the fifth embodiment, a timer may be provided instead of a clock, and the configuration can be simplified.

  FIG. 13 is an explanatory diagram illustrating a sixth example of the power supply operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. In the sixth embodiment, the controller 20 controls the power supply to stop when the temperature detected by the temperature detector 36 becomes equal to or higher than the upper limit value during the power supply operation. If the temperature detected in step (b) becomes lower than the lower limit, control is performed to restart power supply. The upper limit value may be, for example, a temperature at which cooling must be performed by operating the fan 35.

  As illustrated in FIG. 13, the control unit 20 starts power supply with the most efficient output Pout at the time of connection to the EV, and stops power supply when the temperature detected by the temperature detection unit 36 is equal to or higher than the upper limit value. Wait for driving. Thus, a relatively short power supply time (also referred to as a duty width) is represented by Td. When the temperature detected by the temperature detection unit 36 decreases and falls below the lower limit, the control unit 20 restarts power supply. Thereafter, the same control is repeated. If the control unit 20 determines that the power supply amount in the demand unit time (D0 to D1) does not reach the target power supply amount WH when the temperature detected by the temperature detection unit 36 is equal to or higher than the upper limit value, 35, and the power supply is continued until time D1.

  At the start time D1 of the demand unit time (D1 to D2), when the temperature detected by the temperature detection unit 36 becomes equal to or higher than the upper limit, the power supply is stopped and the operation is on standby. When the temperature detected by the temperature detection unit 36 decreases and falls below the lower limit, the control unit 20 restarts power supply. Thereafter, the same control is repeated.

  When the target power supply amount WH is reached in the middle of the demand unit time, the power supply is stopped until the end time of the demand unit time and the operation is waited, for example, as indicated by reference symbols T3 and T4 in FIG. However, when it is determined that the power supply amount does not reach the target power supply amount WH by the end time of the demand unit time, the power supply can be continued until the end time with the fan 35 operating.

  FIG. 14 and FIG. 15 are flowcharts illustrating a processing procedure of the sixth example of the power supply operation by the power conversion device 100 of the present embodiment. When the charging connector 51 is connected (S71) and the start button for starting the power supply operation is turned on (S72), the control unit 20 determines whether the power supply time T is 30 minutes or less (S73). ). The power supply time T can be obtained by the equation T = WH / Pout. In addition, when the power supply start time is set in advance, it may be configured to wait until the power supply start time comes. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S72 is unnecessary.

  When the power supply time T is 30 minutes or less (YES in S73), the control unit 20 waits for operation (S74). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not one of the conditions of the power supply end time or the stop button being turned on is satisfied (S75). If none of the conditions is satisfied (NO in S75), ( Whether the target power supply amount has not been reached and the detected temperature ≦ the lower limit value) or the target power supply amount has not been reached even in continuous operation (including the case where the target power supply amount has just been reached). Is determined (S76).

  When any of the conditions is satisfied (YES in S76), control unit 20 performs power supply operation at output Pout (S77). If none of the conditions is satisfied (NO in S76), control unit 20 continues the processing from step S74. The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S78).

  If none of the conditions is satisfied (NO in S78), the control unit 20 reaches the target power supply amount in demand unit time, or (detected temperature ≧ upper limit value and the target power supply amount expectation in continuous operation is not satisfied). It is determined whether or not one of the conditions is satisfied (S79). When any of the conditions is satisfied (YES in S79), control unit 20 continues the processing in step S74 and thereafter, and when none of the conditions is satisfied (NO in S79), continues the processing in step S77 and subsequent steps.

  If any of the conditions is satisfied in step S75 (YES in S75), or if any of the conditions is satisfied in step S78 (YES in S78), control unit 20 stops the operation (S80) and charges the battery. When the connector 51 is disconnected (S81), the process ends.

  When the power supply time T is not shorter than 30 minutes (NO in S73), the control unit 20 performs the rated power supply operation at the output Pout (S82). The control unit 20 determines whether the discharge lower limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the power supply end capacity of the charger / discharger (the power conversion device 100) has been reached, the power supply end time has been reached, or a stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S83).

  If none of the conditions is satisfied (NO in S83), control unit 20 performs the process of step S82, and if any of the conditions is satisfied (YES in S83), stops the operation (S84), and proceeds to charge connector 51. Is removed (S85), the process ends.

  As described above, in the sixth embodiment, the fan 35 can be operated intermittently without operating the fan 35 at all times, the power consumption of the fan 35 can be suppressed, and the power consumption during the power supply operation can be reduced. Can be.

  Next, the charging operation will be described.

  FIG. 16 is an explanatory diagram illustrating a first example of the charging operation performed by the power conversion device 100 according to the present embodiment. In FIG. 16, the horizontal axis represents time, and D0, D1, D2, D3, D4... Are times that divide a demand unit time D (for example, 30 minutes) corresponding to an example of a predetermined cycle. 00 minutes or 30 minutes. The vertical axis indicates the power consumed by the power converter 100, that is, the input power. In the case of the charging operation, a charging end time te is given.

  As shown in FIG. 16, when an EV is connected in the middle of the demand unit time (D0 to D1), the target charge amount calculation unit 22 calculates a target charge amount per demand unit time. In the example of FIG. 16, the target charge amount calculated at the time of EV connection is represented by CW0. The control unit 20 starts charging with the most efficient input power Pin, and stops charging and stands by when the charged amount reaches the target charged amount CW0. In this case, assuming that the charging time is TC0, it can be represented by TC0 = CW0 / Pin.

  At the start time D1 of the demand unit time (D1 to D2), the target charge amount calculation unit 22 calculates the target charge amount per demand unit time again. In the example of FIG. 16, the target charge amount calculated at time D1 is represented by CW1. The control unit 20 starts charging with the most efficient input power Pin, and stops charging and stands by when the charging amount reaches the target charging amount CW1. In this case, assuming that the charging time is TC1, TC1 = CW1 / Pin.

  Thereafter, the target charge amounts CW2 and CW3 are similarly calculated, and the same control is repeated. When the charge capacity of the EV reaches the charge upper limit battery remaining capacity, or when the charge capacity of the EV reaches the charge end capacity set by the power conversion device 100, the charging is stopped.

  FIGS. 17 and 18 are flowcharts showing a processing procedure of the first example of the charging operation by the power conversion device 100 of the present embodiment. In the following, for the sake of simplicity, the processing will be described as the control unit 20. When the charging connector 51 is connected (S111) and a start button for starting the charging operation is turned on (S112), the control unit 20 calculates a target charging amount per unit time of demand (S113), and calculates the charging time. It is determined whether T is 30 minutes or less (S114). The charging time T can be obtained by the following equation: T = target charge amount / Pin. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S112 is unnecessary.

  When charging time T is 30 minutes or less (YES in S114), control unit 20 waits for operation (S115). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not one of the conditions of the charging end time has been reached or the stop button has been turned on is satisfied (S116). If none of the conditions is satisfied (NO in S116), the current time is determined. Is determined to be 00 minutes of every hour or 30 minutes of every hour (S117). When the current time is 00 minutes every hour or 30 minutes every hour (YES in S117), the control unit 20 performs the processing after step S113. If the current time is not 00 minutes or 30 minutes each hour (NO in S117), the control unit 20 does not reach the target charge amount in the demand unit time or does not reach the charge end capacity even in continuous operation (just the target charge time). Is determined (S118).

  If any of the conditions is satisfied (YES in S118), control unit 20 performs a charging operation using input Pin (S119). If none of the conditions is satisfied (NO in S118), control unit 20 continues the processing from step S115. The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied (S120).

  If none of the conditions is satisfied (NO in S120), control unit 20 determines whether or not the condition that the target charge amount is reached in demand unit time and the charge end capacity can be reached in continuous operation is satisfied. (S121) If the condition is satisfied (YES in S121), the process from step S115 is continued, and if the condition is not satisfied (NO in S121), the process from step S119 is continued.

  If any of the conditions is satisfied in step S116 (YES in S116), or if any of the conditions is satisfied in step S120 (YES in S120), control unit 20 stops the operation (S122) and charges the battery. When the connector 51 is disconnected (S123), the process ends.

  When the charging time T is not shorter than 30 minutes (NO in S114), the control unit 20 performs the rated charging operation at the input Pin (S124). The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S125).

  If none of the conditions is satisfied (NO in S125), control unit 20 performs the process of step S124, and if any of the conditions is satisfied (YES in S125), stops the operation (S126) and causes charging connector 51 to operate. Is removed (S127), the process ends.

  As described above, the control unit 20 starts charging with predetermined power, and controls to stop charging when the charging amount reaches the target charging amount per demand unit time (predetermined cycle). That is, since the control unit 20 performs charging with the most efficient input power so as to reach the target charge amount within the demand unit time, the operation can be performed with high efficiency. When the target charge amount is reached in the middle of the demand unit time, charging is stopped in the remaining time of the demand unit time, so that the connection between the power conversion device 100 and the electric vehicle 50 can be cut off. It is possible to reduce power consumption in related circuits and the like.

  Further, even when electric vehicle 50 is connected to power conversion device 100 in the middle of the demand unit time, control unit 20 performs charging with predetermined power (greater than power during operation of the conventional power conversion device). Since the start is started, the possibility of reaching the target charge amount within the demand unit time is increased. Further, even when electric vehicle 50 is disconnected from power conversion device 100 in the middle of the demand unit time, control unit 20 starts charging with predetermined power (greater than power during operation of the conventional power conversion device). Therefore, the charge amount of the battery 52 of the electric vehicle 50 can be slightly increased.

  Further, when the charge amount does not reach the target charge amount within an arbitrary demand unit time, the control unit 20 continues charging until the demand unit time next to the demand unit time. That is, when the target charge amount is not reached within the demand unit time, the control unit 20 continues charging until the demand unit time ends without stopping charging in the middle of the demand unit time. Thereby, even when the electric vehicle 50 is connected to the power converter 100 in the middle of the demand unit time, the possibility that the target charging amount is reached in the demand unit time can be increased.

  FIG. 19 is an explanatory diagram illustrating a second example of the charging operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. In the second embodiment, it is assumed that the contract power has been given in advance. The control unit 20 controls to adjust the charging period in the predetermined cycle according to the power consumption acquired by the interface unit 31 in an arbitrary predetermined cycle. For example, when the power consumption in demand unit time is increasing at a rate exceeding (contracted power-target charge), the control unit 20 stops charging. The control unit 20 can also restart charging when the power consumption decreases in the middle of the demand unit time and the power consumption increases at a rate lower than (contracted power amount-target charging amount).

  For example, as shown in FIG. 19, when an EV is connected in the middle of the demand unit time (D0 to D1), the target charge amount calculation unit 22 calculates a target charge amount per demand unit time. Further, acquisition of power consumption is started from a start time D0 of the demand unit time (D0 to D1). In the example of FIG. 19, the target charge calculated at the time of EV connection is represented by CW0. Assuming that the power consumption in the demand unit time (D0 to D1) increases at a rate lower than (contracted power-target charging), the control unit 20 starts charging with the most efficient input power Pin. When the charged amount reaches the target charged amount CW0, the charging is stopped and the operation is waited. In this case, assuming that the charging time is TC0, it can be represented by TC0 = CW0 / Pin.

  At the start time D1 of the demand unit time (D1 to D2), the target charge amount calculation unit 22 calculates again the target charge amount per demand unit time. At time D1, the control unit 20 resets the acquired power consumption once, acquires power consumption from time D1, and at a pace where the power consumption from time D1 exceeds (contracted power amount-target charging amount). If it is determined that the charge has increased, charging started from time D1 is stopped, and operation is waited. In addition, during the unit time of demand (D1 to D2), the control unit 20 may restart charging during a period in which it is possible to determine that the power consumption has fallen below the (contracted power amount-target charging amount). Can be.

  Similarly, at the start time D2 of the demand unit time (D2 to D3), the target charge amount calculation unit 22 calculates the target charge amount per demand unit time again. At time D2, control unit 20 once resets the acquired power consumption, acquires power consumption from time D2, and at a pace where power consumption from time D2 falls below (contracted power amount-target charge amount). In some cases, when the charged amount reaches the target charged amount CW2, the charging is stopped and the operation is waited. When the charge amount CW1 ′ in the past demand unit time (D1 to D2 in the example of FIG. 19) is less than the target charge amount, the control unit 20 calculates (target charge amount−charge amount CW1 ′). In order to make up for all or part of the difference (insufficient part), the charging time can be extended to charge an extra amount of charge ΔCW. The same applies to the demand unit time (D3 to D4).

  FIGS. 20, 21, and 22 are flowcharts illustrating a processing procedure of the second example of the charging operation by the power conversion device 100 according to the present embodiment. When the charging connector 51 is connected (S131) and a start button for starting the charging operation is turned on (S132), the control unit 20 calculates a target charging amount per unit time of demand (S133), and determines the charging time. It is determined whether T is 30 minutes or less (S134). The charging time T can be obtained by the following equation: T = target charge amount / Pin. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S132 is unnecessary.

  When charging time T is 30 minutes or less (YES in S134), control unit 20 waits for operation (S135). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether one of the conditions of the charging end time or the stop button has been turned on is satisfied (S136). If none of the conditions is satisfied (NO in S136), the current time is determined. Is determined to be 00 minutes of every hour or 30 minutes of every hour (S137). When the current time is 00 minutes every hour or 30 minutes every hour (YES in S137), the control unit 20 performs the processing of step S133 and subsequent steps. If the current time is not 00 minutes or 30 minutes every hour (NO in S137), the control unit 20 determines whether the power is consumed at a pace not exceeding the contracted electric energy and the target charging amount has not been reached in the demand unit time. ), Or the condition that the end-of-charge capacity has not been reached even during continuous operation (including the case where the target charge amount has been just reached) is satisfied (S138). If the charging end capacity cannot be satisfied, the operation may be performed even if the contracted electric energy is exceeded. In addition, the user is asked in advance to select whether or not to permit the operation beyond the contracted electric energy. If the user does not permit the operation, the charge end capacity is not reached even in the continuous operation (including the charging end capacity). ) Can be eliminated.

  If any of the conditions is satisfied (YES in S138), control unit 20 performs a charging operation using input Pin (S139). If none of the conditions is satisfied (NO in S138), control unit 20 continues the processing from step S135. The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied (S140).

  If none of the conditions is satisfied (NO in S140), control unit 20 determines whether or not the charging end capacity can be reached in continuous operation (S141), and if it can be reached (YES in S141), It is determined whether the power is consumed at a rate exceeding the contracted power amount (S142). When power is not consumed at a pace exceeding the contracted electric energy (NO in S142), control unit 20 determines whether or not the target charging amount is reached in demand unit time (S143), and reaches the target charging amount. In this case (YES in S143), the processing in and after step S135 is continued. When it is not possible to reach the charging end capacity in the continuous operation (NO in S141) or when the target charging amount is not reached in the demand unit time (NO in S143), the control unit 20 continues the processing from step S139. If power is being consumed at a rate exceeding the contracted power amount (YES in S142), control unit 20 continues the processing from step S135.

  If any of the conditions is satisfied in step S136 (YES in S136), or if any of the conditions is satisfied in step S140 (YES in S140), control unit 20 stops the operation (S144) and charges the battery. When the connector 51 is disconnected (S145), the process ends.

  When the charging time T is not less than 30 minutes (NO in S134), the control unit 20 performs the rated charging operation at the input Pin (S146). The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S147).

  If none of the conditions is satisfied (NO in S147), control unit 20 performs the process of step S146, and if any of the conditions is satisfied (YES in S147), stops the operation (S148), and proceeds to charge connector 51. Is removed (S149), the process ends.

  As described above, in the second embodiment, it is possible to prevent charging in a time zone where power demand is high while measuring power demand, and to prevent an increase in contracted power. .

  FIG. 23 is an explanatory diagram illustrating a third example of the charging operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. As shown in FIG. 23, when the EV is connected in the middle of the demand unit time (D0 to D1), the target charge amount calculation unit 22 calculates the target charge amount in demand units, and the control unit 20 Is calculated. Assuming that the target charge amount is CW0 and the input power is Pin, the charging time TC0 can be calculated by TC0 = CW0 / Pin. At a point before the charging time TC0 before the time D1, the control unit 20 starts charging with the most efficient input power Pin.

  The charging is continued even after the demand unit time (D1 to D2), and the charging is stopped when the time TC0 has elapsed from the time D1, and the operation is on standby.

  At the start time D2 of the demand unit time (D2 to D3), the target charge amount calculation unit 22 calculates the target charge amount in demand units, and the control unit 20 calculates the charge time. Assuming that the target charging amount is CW2 and the input power is Pin, the charging time TC2 can be calculated by TC2 = CW2 / Pin. At a point before the charging time TC2 before the time D3, the control unit 20 starts charging with the most efficient input power Pin.

  The charging is continued even after the demand unit time (D3 to D4), and the charging is stopped when the time TC2 has elapsed from the time D3, and the operation is on standby. Thereafter, the same control is repeated.

  FIG. 24 and FIG. 25 are flowcharts illustrating a processing procedure of the third example of the charging operation by the power conversion device 100 of the present embodiment. When the charging connector 51 is connected (S151) and the start button for starting the charging operation is turned on (S152), the control unit 20 sets the variable n to zero (S153), and sets the target per demand unit time. The charge amount is calculated (S154), and it is determined whether the charge time T is 30 minutes or less (S155). The charging time T can be obtained by the following equation: T = target charge amount / Pin. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S152 is unnecessary.

  When charging time T is 30 minutes or less (YES in S155), control unit 20 waits for operation (S156). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether the current time is 00 minutes of every hour or 30 minutes of every hour (S157), and if it is 00 minutes or 30 minutes of every hour (YES in S157), the control unit 20 sets the variable n to 1 is added (S158), and the process of step S159 described below is performed. If it is not 00 minutes or 30 minutes each hour (NO in S157), the control unit 20 determines whether the charging end time has been reached or the stop button has been turned on (S159). If none of the conditions is satisfied (NO in S159), the control unit 20 determines whether the variable n is an even number and the current time ≧ {D (n + 1) -T}, or the charge end capacity even in the continuous operation. It is determined whether or not the condition of not reaching (including just reaching the target charge amount) is satisfied (S160).

  If any of the conditions is satisfied (YES in S160), control unit 20 performs a charging operation using input Pin (S161). If neither condition is satisfied (NO in S160), control unit 20 continues the processing from step S156. The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied or not (S162).

  If none of the conditions is satisfied (NO in S162), control unit 20 determines whether the current time is {D (n + 1) + T}, and whether or not the condition that charging end capacity can be reached in continuous operation is satisfied. It is determined whether or not it is (S163). When the condition is satisfied (YES in S163), control unit 20 continues the processing from step S156, and when the condition is not satisfied (NO in S163), the control unit 20 continues the processing from step S161.

  If any of the conditions is satisfied in step S159 (YES in S159), or if any of the conditions is satisfied in step S162 (YES in S162), control unit 20 stops the operation (S164) and charges the battery. When the connector 51 is disconnected (S164), the process ends.

  If the charging time T is not shorter than 30 minutes (NO in S155), the control unit 20 performs the rated charging operation at the input Pin (S166). The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S167).

  If none of the conditions is satisfied (NO in S167), control unit 20 performs the process of step S166, and if any of the conditions is satisfied (YES in S167), stops the operation (S168), and causes charging connector 51 to operate. Is removed (S169), the process ends.

  As described above, in the third embodiment, the control unit 20 sets the time (D1, D3, D3, ), A time before a predetermined time (the charging times TC0 and TC2 in the example of FIG. 23) is set as a start point of the predetermined cycle. The time zone in which a plurality of demand unit time zones are continuously collected is a time zone in which two continuous demand unit time zones are collected. Thereby, when performing the charging operation, the number of times of starting and stopping the operation can be reduced. For example, since the number of times of driving the relays 11 and 12 can be reduced, the life of the relays 11 and 12 can be extended.

  FIG. 26 is an explanatory diagram illustrating a fourth example of the charging operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. As shown in FIG. 26, when an EV is connected in the middle of the demand unit time (D0 to D1), the target charge amount calculation unit 22 calculates a target charge amount in units of 30 minutes, and the control unit 20 The charging is started with the efficient input power Pin and the timer is operated. Thereafter, when the target charge amount is reached, the control unit 20 stops charging and waits for operation. Assuming that the target charge amount is CW0, the charge time TC0 is TC0 = CW0 / Pin.

  At a point in time when 30 minutes (predetermined cycle) has elapsed from the point of connection with the EV, the target charge amount calculation unit 22 calculates a target charge amount in units of 30 minutes, and the control unit 20 starts charging with the input power Pin, Restart the timer. Thereafter, when the charged amount reaches the target charged amount, the control unit 20 stops charging and waits for operation. Assuming that the target charge amount is CW1, the charge time TC1 is TC1 = CW1 / Pin. Thereafter, the same control is repeated.

  FIG. 27 and FIG. 28 are flowcharts showing the processing procedure of the fourth example of the charging operation by the power converter 100 of the present embodiment. When the charging connector 51 is connected (S171) and the start button for starting the charging operation is turned on (S172), the control unit 20 calculates a target charging amount per unit time of demand (S173), and sets the charging time. It is determined whether T is 30 minutes or less (S174). The charging time T can be obtained by the following equation: T = target charge amount / Pin. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S172 is unnecessary.

  When charging time T is 30 minutes or less (YES in S174), control unit 20 waits for operation (S175). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not any of the conditions of the charging end time or the stop button has been turned on is satisfied (S176). If none of the conditions is satisfied (NO in S176), It is determined whether or not 30 minutes have elapsed since the operation (S177). If 30 minutes have elapsed (YES in S177), the processing after step S173 is continued. If 30 minutes have not elapsed (NO in S177), the control unit 20 has not reached the target charge amount in the demand unit time, or has not reached the charge end capacity even in the continuous operation (just reaches the target charge amount). It is determined whether or not any of the conditions is satisfied (S178).

  If any of the conditions is satisfied (YES in S178), control unit 20 performs the charging operation with input Pin (S179). If neither condition is satisfied (NO in S178), control unit 20 continues the processing from step S175. The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied or not (S180).

  If none of the conditions is satisfied (NO in S180), control unit 20 determines whether or not the condition that the target charge amount is reached in demand unit time and the charge end capacity can be reached in continuous operation is satisfied. (S181) When the condition is satisfied (YES in S181), the processing from step S175 is continued, and when the condition is not satisfied (NO in S181), the processing from step S179 is continued.

  If any of the conditions is satisfied in step S176 (YES in S176), or if any of the conditions is satisfied in step S180 (YES in S180), control unit 20 stops the operation (S182) and charges the battery. When the connector 51 is disconnected (S183), the process ends.

  If the charging time T is not shorter than 30 minutes (NO in S174), the control unit 20 performs the rated charging operation at the input Pin (S184). The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether one of the conditions of whether the button is turned on is satisfied (S185).

  If none of the conditions is satisfied (NO in S185), control unit 20 performs the process of step S184, and if any of the conditions is satisfied (YES in S185), stops the operation (S186) and causes charging connector 51 to operate. Is removed (S187), the process ends.

  As described above, in the fourth embodiment, a timer may be provided instead of a clock, and the configuration can be simplified.

  FIG. 29 is an explanatory diagram illustrating a fifth example of the charging operation performed by the power conversion device 100 according to the present embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of the same portions will be omitted. In the fifth embodiment, the control unit 20 controls to stop charging when the temperature detected by the temperature detection unit 36 is equal to or higher than the upper limit value during the charging operation. When the detected temperature falls below the lower limit, control is performed to restart charging. The upper limit value may be, for example, a temperature at which cooling must be performed by operating the fan 35.

  As shown in FIG. 29, at the time of connection to the EV, the target charge amount calculation unit 22 calculates a target charge amount per demand unit time, and the control unit 20 starts charging with the most efficient input power Pin, When the temperature detected by the temperature detection unit 36 is equal to or higher than the upper limit, the charging is stopped and the operation is waited. Thus, a relatively short charging time (also called a duty width) is represented by Td. When the temperature detected by the temperature detection unit 36 decreases and falls below the lower limit, the control unit 20 restarts charging. Thereafter, the same control is repeated. If the control unit 20 determines that the charge amount in the demand unit time (D0 to D1) does not reach the target charge amount CW0 when the temperature detected by the temperature detection unit 36 is equal to or higher than the upper limit value, 35 is operated to continue charging until time D1.

  At the start time D1 of the demand unit time (D1 to D2), the target charge amount calculation unit 22 calculates the target charge amount for the demand unit time. When the temperature detected by the temperature detection unit 36 becomes equal to or higher than the upper limit value at the time D1, the charging is stopped and the operation is waited. When the temperature detected by the temperature detection unit 36 decreases and falls below the lower limit, the control unit 20 restarts charging. Thereafter, the same control is repeated.

  When the target charge amount (for example, CW1, CW2, CW3 in FIG. 29) is reached in the middle of the demand unit time, the charging is stopped at that time and the operation is waited until the end time of the demand unit time. However, if it is determined that the charge amount does not reach the target charge amount by the end time of the demand unit time, the charging can be continued until the end time with the fan 35 operating.

  FIG. 30, FIG. 31, and FIG. 32 are flowcharts showing a processing procedure of the fifth example of the charging operation by the power conversion device 100 of the present embodiment. When the charging connector 51 is connected (S191) and the start button for starting the charging operation is turned on (S192), the control unit 20 calculates the target charging amount per unit time of demand (S193), and sets the charging time. It is determined whether T is 30 minutes or less (S194). The charging time T can be obtained by the following equation: T = target charge amount / Pin. It is assumed that the operation of the charge start button is included in the connection of the charging connector 51. In this case, the processing in step S192 is unnecessary.

  When charging time T is 30 minutes or less (YES in S194), control unit 20 waits for operation (S195). In the operation standby state, for example, the relays 11 and 12 are opened, the communication with the EV is turned off, the power conversion device 100 is in the sleep mode, and for example, a power source other than the control unit 20 and the lock mechanism of the charging connector 51 is turned off. Turn off.

  The control unit 20 determines whether or not one of the conditions of the charging end time or the stop button being turned on is satisfied (S196). If none of the conditions is satisfied (NO in S196), the current time is determined. It is determined whether the time is 00 minutes every hour or 30 minutes every hour (S197). When the current time is 00 minutes each hour or 30 minutes each hour (YES in S197), the control unit 20 performs the processing of step S193 and thereafter. If the current time is not 00 minutes or 30 minutes each hour (NO in S197), the control unit 20 determines whether the target charge amount has not reached the target unit time and the detected temperature ≦ the lower limit value, or the target value has been set for continuous operation. It is determined whether or not one of the following conditions is satisfied: the charging amount has not been reached, or the charging end capacity has not been reached even in the continuous operation (including the case where the target charging amount has been just reached) (S198).

  If any of the conditions is satisfied (YES in S198), control unit 20 performs a charging operation using input Pin (S199). If none of the conditions is satisfied (NO in S198), the control unit 20 continues the processing from step S195. The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has been reached, or the stop has occurred. It is determined whether any of the conditions of whether the button is turned on is satisfied (S200).

  If none of the conditions is satisfied (NO in S200), control unit 20 determines whether or not the target amount of charge per unit of demand can be reached in continuous operation (S201), and if it is possible (YES in S201). ), It is determined whether or not the condition that the target charge amount is reached in the demand unit time or whether the detected temperature is equal to or more than the upper limit value is satisfied (S202), and if the condition is satisfied (YES in S202), If the conditions are not satisfied (NO in S202), the processing after step S195 is continued. When it is not possible to reach the target charge amount per demand unit time in continuous operation (NO in S201), the control unit 20 continues the processing from step S199.

  If any of the conditions is satisfied in step S196 (YES in S196), or if any of the conditions is satisfied in step S200 (YES in S200), control unit 20 stops the operation (S203) and charges the battery. When the connector 51 is disconnected (S204), the process ends.

  If the charging time T is not shorter than 30 minutes (NO in S194), the control unit 20 performs the rated charging operation at the input Pin (S205). The control unit 20 determines whether the charge upper limit battery remaining capacity of the vehicle (the battery 52 of the EV) has been reached, the charge end capacity of the charger / discharger (the power conversion device 100) has been reached, the charge end time has come, or the stop has occurred. It is determined whether or not one of the conditions of whether the button is turned on is satisfied (S206).

  If none of the conditions is satisfied (NO in S206), control unit 20 performs the process of step S205, and if any of the conditions is satisfied (YES in S206), the operation is stopped (S207), and charging connector 51 is stopped. Is removed (S208), the process ends.

  As described above, in the fifth embodiment, it is possible to operate the fan 35 intermittently without operating the fan 35 at all times, to suppress the power consumption of the fan 35, and to reduce the power consumption during the charging operation. Can be.

  The operation control of the power conversion device 100 according to the present embodiment can also be realized using a computer including a CPU (processor, microprocessor, etc.), a RAM, and the like. That is, a computer program defining a processing procedure as shown in each of the above-described drawings is loaded into a RAM provided in the computer, and the computer program is executed by a CPU (a processor, a microprocessor, or the like). The conversion device 100 can be controlled.

DESCRIPTION OF SYMBOLS 1 Power system 100 Power converter 10 AC / DC conversion circuit 11, 12 Relay 20 Control part (CPU)
DESCRIPTION OF SYMBOLS 21 Power supply time calculation part 22 Target charge amount calculation part 23 Judgment part 31 Interface part 32 Clock 33 Operation part 34 Communication part 35 Fan 36 Temperature detection part 50 Electric vehicle (EV)
51 charging connector 52 battery 200 distribution board 201 main breaker 202, 203, 204, 205 branch breaker 301, 302, 303 load

Claims (12)

In a power converter that performs at least one of a charging operation of converting an alternating current to a direct current and charging a battery and a power supply operation of converting a direct current to an alternating current and supplying power to a load,
Charging or power supply is started with predetermined power at a start time within a demand unit time having a predetermined time length, and the charge amount or the power supply amount reaches the target charge amount or the target power supply amount at the time point within the demand unit time. In the case, a control unit that controls to stop charging or power supply at the time is provided,
The control unit includes:
Control to repeat charging or power supply every the demand unit time,
Further, a power consumption acquisition unit for acquiring the power consumption of the load,
The control unit includes:
A power conversion device, wherein control is performed to adjust the power supply start time in the demand unit time according to the power consumption acquired by the power consumption acquisition unit within an arbitrary demand unit time. The control unit includes:
When the charge amount or the power supply amount does not reach the target charge amount or the target power supply amount within an arbitrary demand unit time, charging or power supply is continued until the next demand unit time after the demand unit time. Item 2. The power converter according to Item 1. The control unit includes:
The control according to claim 1 or 2, wherein control is performed to adjust a charging period in the demand unit time according to the amount of power consumption acquired by the power consumption acquisition unit within an arbitrary demand unit time. The power converter according to any one of the preceding claims. A power supply time calculation unit that calculates a power supply time per unit of demand based on a power supply amount to supply power to the load and the target power supply amount,
The control unit includes:
The power conversion according to any one of claims 1 to 3, wherein control is performed to stop power supply when the power supply time elapses from a power supply start time within an arbitrary demand unit time. apparatus. A charge acquisition unit for acquiring a required charge amount and a charge end time of the battery,
5. A target charge amount calculating unit that calculates the target charge amount based on the required charge amount and the end time of the charge acquired by the charge acquisition unit. 6. Item 7. The power converter according to Item 1. The target charge amount calculation unit,
The power converter according to claim 5, wherein a target charge amount is calculated for each demand unit time. A temperature detection unit that detects the temperature of a predetermined location is provided,
The control unit includes:
If the temperature detected by the temperature detection unit during the charging operation or the power supply operation is equal to or higher than the upper limit, control to stop charging or power supply,
7. The method according to claim 1, wherein when the temperature detected by the temperature detection unit becomes lower than or equal to a lower limit value while the charging operation or the power supply operation is stopped, control is performed to restart the charging or the power supply. The power converter according to claim 1. The control unit includes:
The time which divides the unit time zone which determines contract power, or the time before predetermined time before the said time is made into the start time of the said demand unit time, The Claim 1 characterized by the above-mentioned. Power converter. The control unit includes:
The time when a plurality of unit time zones for determining contract power are successively grouped or a time before a predetermined time before the time is set as a start time point of the demand unit time. The power converter according to any one of claims 7 to 7. A determination unit that determines the presence or absence of connection with a vehicle equipped with the battery,
The control unit includes:
The power converter according to any one of claims 1 to 7, wherein control is performed to repeat charging or power supply in the demand unit time after the determination unit determines that a vehicle is connected. A computer program for causing a computer to control a power conversion device that performs at least one of a charging operation of converting AC to DC and charging a battery and a power supply operation of converting DC to AC and supplying power to a load.
Computer
Charging or power supply is started with predetermined power at a start time within a demand unit time having a predetermined time length, and the charge amount or the power supply amount reaches the target charge amount or the target power supply amount at the time point within the demand unit time. In this case, at the point in time to function as a control unit that controls to stop charging or power supply,
The control unit includes:
Control to repeat charging or power supply every the demand unit time,
In addition, the computer
Functioning as a power consumption obtaining unit for obtaining the power consumption of the load,
The control unit includes:
A computer program for controlling a power supply start time in a demand unit time according to a degree of power consumption acquired by the power consumption acquisition unit within an arbitrary demand unit time. In a power conversion method by a power conversion device performing at least one of a charging operation of charging a battery by converting AC to DC and a power supply operation of converting DC to AC and supplying power to a load,
Charging or power supply is started with predetermined power at a start time within a demand unit time having a predetermined time length, and the charge amount or the power supply amount reaches the target charge amount or the target power supply amount at the time point within the demand unit time. In the case, the method includes a step of controlling the control unit to stop charging or power supply at the time,
The control unit includes:
Control to repeat charging or power supply every the demand unit time,
Furthermore, the method includes a step of obtaining power consumption of the load,
The control unit includes:
If some power was acquired within any demand unit time, power conversion method and controlling to adjust the feeding start time in the demand unit time.

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