JP2021027647A - Power supply system and power supply vehicle - Google Patents

Abstract

To improve stability of power supply in the case of emergency.SOLUTION: A power supply system 1 according to the present invention is available for power supply to a facility in the case of emergency. The power supply system 1 comprises: a plurality of power acquisition devices 10, each power acquisition device 10 being capable of receiving power from a vehicle on which a battery is mounted; a plurality of integration devices 20, each integration device 20 connected to at least one or more power acquisition devices 10 of the plurality of power acquisition devices 10 and integrating power supplied from the connected at least one or more power acquisition devices 10; a conversion device 40 for converting power supplied from any one integration device 20 of the plurality of integration devices 20 from single-phase AC power to three-phase AC power; and a power switching device 30 for switching connection between the conversion device 40 and the plurality of integration devices 20 so that any one integration device 20 is connected to the conversion device 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a power supply system and a power supply vehicle used for power supply in an emergency.

In recent years, vehicles equipped with batteries, such as electric vehicles (EVs) and plug-in hybrid vehicles (PHVs), have become widespread.

Batteries installed in automobiles can also be used for purposes other than automobiles. For example, ideas such as V2H (Vehicle to Home) and V2G (Vehicle to Grid) are known. V2H is an idea of using a battery installed in an automobile as a source of electric power for home use. V2G is the idea of supplying power to the power system from a battery installed in an automobile.

For example, Patent Document 1 discloses an invention in which when a battery mounted on a mobile body such as an automobile is used as a power supply source for other equipment, which mobile body battery is used as the power supply source is selected. It is disclosed.

Japanese Patent No. 6485566

In an emergency, such as when a large-scale power outage occurs due to a disaster, if a car equipped with a battery can supply power to the facility during the power outage, the effect of the power outage on the facility will be affected. It can be mitigated.

At this time, since a large-scale power outage due to the occurrence of a disaster may continue for a long time, it is preferable that the electric power of the vehicle equipped with the battery can be stably supplied to the facility for a long time.

An object of the present invention made in view of such a point is to provide a power supply system and a power supply vehicle capable of improving the stability of power supply in an emergency.

The power supply system according to the present invention can be used to supply power to a facility in an emergency. The power supply system is a plurality of power acquisition devices, and each power acquisition device is capable of receiving power supply from a vehicle equipped with a battery, and a plurality of power acquisition devices and a plurality of power acquisition devices. An integrated device, wherein each integrated device is connected to at least one or more power acquisition devices among the plurality of power acquisition devices, and is supplied from the at least one or more connected power acquisition devices. A plurality of integrated devices that integrate the powers to be generated, and a conversion device that converts the power supplied from any one of the plurality of integrated devices from single-phase AC power to three-phase AC power. A power switching device for switching the connection between the plurality of integrated devices and the conversion device is provided so that any one of the plurality of integrated devices is connected to the conversion device.

Further, the power supply vehicle according to the present invention is provided with a power supply system that can be used to supply power to a facility in an emergency, and is movable. The power supply system is a plurality of power acquisition devices, and each power acquisition device is capable of receiving power supply from a vehicle equipped with a battery, and a plurality of power acquisition devices and a plurality of power acquisition devices. An integrated device, wherein each integrated device is connected to at least one or more power acquisition devices among the plurality of power acquisition devices, and is supplied from the at least one or more connected power acquisition devices. A plurality of integrated devices that integrate the powers to be generated, and a conversion device that converts the power supplied from any one of the plurality of integrated devices from single-phase AC power to three-phase AC power. A power switching device for switching the connection between the plurality of integrated devices and the conversion device is provided so that any one of the plurality of integrated devices is connected to the conversion device.

According to the power supply system and the power supply vehicle according to the present invention, the stability of the power supply in an emergency can be improved.

It is a figure which shows the schematic structure of the electric power supply system which concerns on one Embodiment of this invention. It is a figure which shows the schematic structure of the power switching device of FIG. It is a schematic diagram of the power supply vehicle equipped with the power supply system of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a power supply system 1 according to an embodiment of the present invention. The power supply system 1 can be used to supply power to the facility in an emergency.

The facility to which the power supply system 1 supplies power in an emergency is, for example, an apartment house, a hospital, a government building such as a city hall, or a gymnasium operated as an evacuation center. Here, the "emergency" is a time when it is not possible to supply electric power to the facility from a commercial electric power system managed by an electric power company or the like. An example of an emergency is when a large-scale power outage occurs due to the occurrence of a disaster.

The power supply system 1 may be installed on the premises of the facility. When the power supply system 1 is installed on the premises of an apartment, for example, the power supply system 1 may supply power to the installed apartment in an emergency. Alternatively, the power supply system 1 may supply power to a facility other than the apartment house in which the power supply system 1 is installed, for example, a hospital in the neighborhood in an emergency.

The power supply system 1 includes a plurality of power acquisition devices 10, a plurality of integrated devices 20A to 20C, a power switching device 30, and a conversion device 40.

As shown in FIG. 1, the plurality of power acquisition devices 10 are divided into three groups, Group A, Group B, and Group C. Further, the integrated devices 20A to 20C belong to groups A to C, respectively. The power acquisition device 10 of the group A is connected to the integrated device 20A of the group A. The power acquisition device 10 of the group B is connected to the integrated device 20B of the group B. The power acquisition device 10 of the group C is connected to the integrated device 20C of the group C. Hereinafter, the integrated devices 20A to 20C will be described simply as the integrated device 20 when it is not necessary to distinguish them.

FIG. 1 shows an example in which a plurality of power acquisition devices 10 are divided into three groups, but if the plurality of power acquisition devices 10 are divided into a plurality of groups, they are divided into groups other than the three. You may be. The plurality of power acquisition devices 10 may be divided into two groups, or may be divided into four or more groups.

Further, FIG. 1 shows an example in which five power acquisition devices 10 are included in one group, but the present invention is not limited to this. One group may include one or more arbitrary number of power acquisition devices 10. Further, in FIG. 1, the number of power acquisition devices 10 included in each group is the same, but the number of power acquisition devices 10 included in each group may be different for each group.

The electric power acquisition device 10 can receive electric power from the vehicle 50. The vehicle 50 is a vehicle equipped with a battery. The vehicle 50 is, for example, an EV or a PHV, but is not limited to these, and may be any automobile equipped with a battery. Further, the vehicle 50 is not limited to an automobile as long as it is a vehicle equipped with a battery, and may be, for example, a motorcycle, a bicycle, a train, or the like.

The electric power acquisition device 10 may be supplied with electric power as AC electric power or may be supplied with electric power as DC electric power from the vehicle 50. Whether the power acquisition device 10 receives power by AC power or DC power may depend on whether the vehicle 50 can output AC power or DC power. For example, when the vehicle 50 is equipped with an inverter, the vehicle 50 can output AC power.

The power acquisition device 10 outputs the AC power to the integrated device 20 in both the case where the power is supplied as AC power and the case where the power is supplied as DC power.

When the power acquisition device 10 receives power as AC power from the vehicle 50, the power acquisition device 10 outputs the AC power to the integrated device 20 as it is.

When the power acquisition device 10 receives power as DC power from the vehicle 50, the power acquisition device 10 converts the DC power into AC power and outputs the DC power to the integrated device 20. The power acquisition device 10 may include an inverter that converts DC power into AC power.

The power acquisition device 10 may include two power input units, an AC power input unit and a DC power input unit, as power input units for receiving power from the vehicle 50. Alternatively, the power acquisition device 10 may include one power input unit shared by AC and DC as a power input unit that receives power from the vehicle 50. In this case, the power acquisition device 10 may be configured to be able to switch whether or not to operate the inverter depending on whether the input is AC or DC.

The power acquisition device 10 outputs single-phase AC power. The power acquisition device 10 may output single-phase AC power by, for example, a single-phase three-wire system or a single-phase two-wire system.

The integrated device 20 is connected to at least one or more power acquisition devices 10. In the example shown in FIG. 1, the integrated device 20 is connected to the five power acquisition devices 10, but the present invention is not limited to this. The integrated device 20 may be connected to one or more arbitrary number of power acquisition devices 10.

The integrated device 20 integrates the single-phase AC power supplied from the power acquisition device 10 and outputs it to the power switching device 30. In the example shown in FIG. 1, the integrating device 20 integrates the electric power supplied from the five power acquisition devices 10. The integrated device 20 outputs the integrated single-phase AC power to the power switching device 30. When the integrated device 20 integrates the electric power supplied from the plurality of electric power acquisition devices 10, the integrated device 20 can output the electric power larger than the electric power obtained from one vehicle 50 to the electric power switching device 30.

The power switching device 30 switches the connection between the integrated devices 20A to 20C and the conversion device 40 so that any one of the integrated devices 20A to 20C is connected to the conversion device 40. When the power switching device 30 connects the integrated device 20A and the conversion device 40, the single-phase AC power output by the integrated device 20A is supplied to the conversion device 40. When the power switching device 30 connects the integrated device 20B and the conversion device 40, the single-phase AC power output by the integrated device 20B is supplied to the conversion device 40. When the power switching device 30 connects the integrated device 20C and the conversion device 40, the single-phase AC power output by the integrated device 20C is supplied to the conversion device 40. Details of the configuration and function of the power switching device 30 will be described later.

The conversion device 40 is connected to any one of the integrated devices 20A to 20C according to the switching operation by the power switching device 30. The conversion device 40 converts the single-phase AC power supplied from the integrated device 20 connected via the power switching device 30 into three-phase AC power. Single-phase AC power is also commonly referred to as a "lamp." Three-phase AC power is also commonly referred to as "power."

The conversion device 40 may also convert the voltage of the AC power when converting the single-phase AC power supplied from the integrated device 20 into the three-phase AC power. The conversion device 40 may, for example, convert a first voltage, which is a voltage of single-phase AC power, into a second voltage, which is a voltage of three-phase AC power. At this time, the second voltage may be a voltage larger than the first voltage. For example, the first voltage may be 100V and the second voltage may be 200V. The conversion device 40 may include a transformer for converting the voltage.

The conversion device 40 outputs three-phase AC power to the switching board 60. The switching board 60 can switch from which power source the power is supplied to the facility. The switching board 60 may include a switch capable of switching the connection of power lines. Normally, the switching board 60 switches the connection of power lines so that power is supplied to the facility from a commercial system managed by an electric power company or the like. Further, the switching board 60 can switch the connection of the power line so that power can be supplied from a power source other than the commercial system such as the power supply system 1 in an emergency.

The switching board 60 may be configured to manually switch the power line connection, or may be configured to automatically switch the power line connection. In the case of a configuration in which the connection of the power line is automatically switched, the switching board 60 automatically connects the power line so that the power supply system 1 can supply power to the facility when it detects an emergency. Switch with.

In an emergency, the conversion device 40 can supply three-phase AC power to the facility via the switching board 60. Single-phase AC power cannot operate large-scale electrical equipment such as elevators, but three-phase AC power can operate large-scale electrical equipment such as elevators. Therefore, since the power supply system 1 can supply three-phase AC power to the facility in an emergency, it enables a large-scale electric facility such as an elevator to operate in the facility during a power outage.

Subsequently, the configuration and function of the power switching device 30 will be described with reference to FIG. As shown in FIG. 2, the power switching device 30 includes switches 31A to 31C, a control unit 32, a storage unit 33, and an input unit 34.

The switch 31A switches on / off the connection between the integrated device 20A and the conversion device 40 based on the control signal from the control unit 32. The switch 31B switches on / off the connection between the integrated device 20B and the conversion device 40 based on the control signal from the control unit 32. The switch 31C switches on / off the connection between the integrated device 20C and the conversion device 40 based on the control signal from the control unit 32.

When the switch 31A is turned on, power is supplied from the integrated device 20A to the conversion device 40. When the switch 31B is turned on, power is supplied from the integrated device 20B to the conversion device 40. When the switch 31C is turned on, power is supplied from the integrated device 20C to the conversion device 40.

Hereinafter, the switches 31A to 31C will be described simply as the switch 31 when it is not necessary to distinguish them.

Although FIG. 2 shows a configuration in which the power switching device 30 includes three switches 31A to 31C, the number of switches 31 included in the power switching device 30 is not limited to three. The power switching device 30 may include a plurality of switches 31, and the number of switches 31 may be two or four or more.

The switch 31 may be, for example, an electromagnetic switch. When the switch 31 is an electromagnetic switch, the switch 31 is turned on when a current flows through a coil included in the electromagnetic switch by a control signal from the control unit 32. Further, when the control signal from the control unit 32 causes a current to stop flowing through the coil included in the electromagnetic switch, the switch 31 is turned off.

The control unit 32 controls each component of the power switching device 30 and the entire power switching device 30. The control unit 32 may include one or more processors. The processor may be configured as a general-purpose processor that loads a specific program and executes a specific function, or may be configured as a dedicated processor specialized for a specific process.

The storage unit 33 stores various data, a program executed by the control unit 32, and the like. The storage unit 33 may be composed of, for example, a semiconductor memory, a magnetic memory, or the like. The storage unit 33 may be configured integrally with the control unit 32.

The input unit 34 receives an input from the user to the power switching device 30. The input unit 34 may be configured as a physical button or a touch panel that accepts input to the screen. For example, the user of the power supply system 1 can start or end the operation of the power switching device 30 by operating the input unit 34.

Subsequently, the operation of the control unit 32 will be described in detail.

The control unit 32 controls the on / off of the switch 31 and switches which of the integrated devices 20A to 20C is connected to the conversion device 40. The control unit 32 controls the switches 31A to 31C so that only one of the switches 31A to 31C is turned on. FIG. 2 shows a state in which only the switch 31A is turned on.

The control unit 32 controls the on / off of the switches 31A to 31C so that the switches 31 are circulated and turned on in the order of, for example, the switch 31A, the switch 31B, and the switch 31C. That is, the control unit 32 controls the on / off of the switches 31A to 31C so that, for example, the states 1 to 3 shown below circulate and repeat in the order of the state 1, the state 2, and the state 3.
State 1: Switch 31A is on, Switch 31B is off, Switch 31C is off State 2: Switch 31A is off, Switch 31B is on, Switch 31C is off State 3: Switch 31A is off, Switch 31B is off, Switch 31C is on

The control unit 32 switches which switch 31 is turned on each time a predetermined time elapses. The predetermined time is not particularly limited, but may be, for example, about 5 hours.

The storage unit 33 may store the value at the predetermined time. The control unit 32 switches ON / OFF of the switches 31A to 31C with reference to the value of the predetermined time stored in the storage unit 33.

A user of the power supply system 1 such as an administrator can change the value of a predetermined time stored in the storage unit 33 by operating the input unit 34. Alternatively, the user can store a new predetermined time value in the storage unit 33 by operating the input unit 34.

As described above, according to the present embodiment, the power switching device 30 has the plurality of integrated devices 20A so that the integrated device 20 of any one of the plurality of integrated devices 20A to 20C is connected to the conversion device 40. The connection between ~ 20C and the conversion device 40 is switched. As a result, the power switching device 30 can be used even if, for example, the battery level of the vehicle 50 supplying power to the integrated device 20A decreases while the integrated device 20A is connected to the conversion device 40. The connection can be switched so that the integrated device 20B is connected to the converter 40 before the vehicle 50 becomes undischarged. At this time, if the vehicle 50 equipped with the dischargeable battery is connected to the power acquisition device 10 connected to the integrated device 20B, the integrated device 20B can supply power to the conversion device 40. .. Therefore, the power supply system 1 according to the present embodiment can supply power to the facility for a long time in an emergency. That is, the power supply system 1 according to the present embodiment can improve the stability of the power supply in an emergency.

Further, according to the present embodiment, the conversion device 40 converts the power supplied from the integrated device 20 from single-phase AC power to three-phase AC power. As a result, the conversion device 40 can supply the facility with three-phase AC power in an emergency. Therefore, the power supply system 1 according to the present embodiment can operate a large-scale electric facility such as an elevator in an emergency facility.

(Power supply vehicle)
In the description of FIG. 1, the power supply system 1 has been described as being installed on the premises of the facility, but the power supply system 1 may be mounted on a movable vehicle. FIG. 3 shows a schematic view of a movable power supply vehicle 2 equipped with a power supply system 1.

In FIG. 3, the power supply system 1 mounted on the power supply vehicle 2 is a system having the same functions as the power supply system 1 described with reference to FIG.

Since the power supply vehicle 2 is movable, the power supply vehicle 2 can go to a facility where power supply is required in an emergency. If the conversion device 40 of the power supply vehicle 2 is connected to the switching panel 60 installed in the facility where power supply is required in an emergency, and the vehicle 50 is connected to the power acquisition device 10 of the power supply vehicle 2. , Electric power can be supplied from the electric power supply vehicle 2 to a facility where electric power supply is required in an emergency.

By providing the power supply vehicle 2 with the power supply system 1 in this way, it is possible to supply power to a facility not equipped with the power supply system 1 in an emergency.

Although the present invention has been described with reference to the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are within the scope of the present invention. For example, the functions included in each component and each step can be rearranged so as not to be logically inconsistent, and a plurality of components or steps can be combined or divided into one. Is. Further, although the present invention has been described mainly on the apparatus, the present invention can also be realized as a method including steps executed by each component of the apparatus. Further, although the present invention has been described mainly on the apparatus, the present invention can be realized as a method, a program, or a storage medium on which the program is recorded, which is executed by the processor included in the apparatus, and is within the scope of the present invention. It should be understood that these are also included.

For example, the power acquisition device 10 may receive power from another mobile body equipped with a battery instead of the vehicle 50. Examples of other mobiles include, for example, ships and airplanes.

Further, the electric power acquisition device 10 is not limited to the battery mounted on the vehicle 50, and may receive electric power from the battery alone.

1 Power supply system 2 Power supply vehicle 10 Power acquisition device 20, 20A, 20B, 20C Integrated device 30 Power switching device 31, 31A, 31B, 31C Switch 32 Control unit 33 Storage unit 34 Input unit 40 Conversion device 50 Vehicle 60 Switching panel

Claims (5)

A power supply system that can be used to supply power to facilities in an emergency.
A plurality of power acquisition devices, wherein each power acquisition device can receive power from a vehicle equipped with a battery, and a plurality of power acquisition devices.
A plurality of integrated devices, wherein each integrated device is connected to at least one or more power acquisition devices among the plurality of power acquisition devices, and the connected at least one or more power acquisition devices. With multiple integrated devices that integrate the power supplied from
A conversion device that converts power supplied from any one of the plurality of integrated devices from single-phase AC power to three-phase AC power, and
A power supply system including a power switching device that switches the connection between the plurality of integrated devices and the conversion device so that any one of the plurality of integrated devices is connected to the conversion device. .. In the power supply system according to claim 1,
The power switching device is a power supply system that switches the integrated device connected to the conversion device every time a predetermined time elapses. In the power supply system according to claim 1 or 2.
The conversion device can be connected to a switching board capable of switching the connection of power lines so that the facility and the conversion device are connected in an emergency, and power is supplied to the facility via the switching board in an emergency. It is possible, a power supply system. In the power supply system according to any one of claims 1 to 3,
The conversion device converts the first voltage, which is the voltage of the single-phase AC power, into the second voltage, which is the voltage of the three-phase AC power.
A power supply system in which the second voltage is larger than the first voltage. A mobile power supply vehicle comprising the power supply system according to any one of claims 1 to 4.

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