JP2017169356A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a plurality of vehicles each generating single-phase AC to supply three-phase AC to a power load.SOLUTION: A power supply system comprises: three vehicles; and a supply device connected with the three vehicles and an electric apparatus. Each of the three vehicles includes: a power storage unit; an inverter for receiving power from the power storage unit and generating single-phase AC; a control unit for controlling the inverter; and a communication unit. The control unit of each vehicle shares the same reference phase with the other vehicles through radio communication by the communication unit, and uses the reference phase to control the inverter so that phases of three flows of single-phase AC W1, W2 and W3 generated by the respective vehicles differ by 120 degrees from each other. The supply device combines the three flows of single-phase AC W1, W2 and W3 input by the respective vehicles and outputs resultant AC as three-phase AC to the electric apparatus.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power feeding system using a vehicle capable of generating AC power.

  A vehicle (such as an electric vehicle, a hybrid vehicle, or a fuel cell vehicle) using a motor as a driving force source generally includes a chargeable / dischargeable power storage unit. In recent years, it has been proposed to use a vehicle equipped with such a power storage unit as a power source for a house or the like. For example, in Japanese Unexamined Patent Application Publication No. 2008-35665 (Patent Document 1), a plurality of vehicles capable of generating single-phase alternating current are connected to a house, and a plurality of phases are synchronized by synchronizing the phases of single-phase alternating current generated by each vehicle. It is disclosed to supply a single-phase alternating current from a vehicle to one electric power load in a house.

JP 2008-35665 A JP 2001-224133 A

  The power supply system disclosed in Patent Document 1 can supply single-phase alternating current to a single power load from a plurality of vehicles each generating single-phase alternating current, but cannot supply three-phase alternating current. For this reason, the power supply system disclosed in Patent Document 1 cannot be used as a power source for an electric load that requires three-phase alternating current.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to enable supply of a three-phase alternating current to a power load from a plurality of vehicles each generating a single-phase alternating current. is there.

  The control device according to the present invention is a power feeding system capable of supplying a three-phase alternating current to a power load, and includes three vehicles. Each of the three vehicles includes a power storage unit, a generation unit that receives power from the power storage unit and generates single-phase alternating current, a control unit that controls the generation unit, and a communication unit that communicates with the outside. The control unit shares the same reference phase with other vehicles by communication with the outside by the communication unit, and using the reference phase, the phases of the three single-phase alternating currents generated by the three vehicles are mutually The generation unit is controlled to be shifted by 120 degrees. The power supply system further includes a supply device that is electrically connected to three vehicles and an electric power load and outputs three-phase alternating currents to the electric power load by combining three single-phase alternating currents respectively input from the three vehicles. .

  According to the above configuration, the control unit of each vehicle communicates with the outside by the communication unit (communication with a control unit provided in another vehicle or a supply facility) and has the same reference phase with the other vehicle. And using the reference phase, control is performed so that the phases of the three single-phase alternating currents generated by the three vehicles are shifted from each other by 120 degrees. Then, the supply device combines three single-phase alternating currents input from three vehicles and outputs the combined three-phase alternating current to the electric power load. Thereby, three-phase alternating current can be supplied with respect to an electric power load from the three vehicles which each generate | occur | produce single-phase alternating current.

It is a schematic block diagram (the 1) of an electric power feeding system. It is a flowchart which shows an example of the process sequence which each vehicle each performs. It is a figure which shows typically the waveform of the single-phase alternating current W1, W2, W3 produced | generated with a vehicle, and the waveform of the three-phase alternating current supplied to an electric power apparatus from an electric power feeding system. It is a schematic block diagram (the 2) of an electric power feeding system. It is a schematic block diagram (the 3) of an electric power feeding system. It is a schematic block diagram (the 4) of an electric power feeding system.

  Embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

<Configuration of power supply system>
FIG. 1 is a schematic configuration diagram of a power feeding system 1 according to the present embodiment. The power supply system 1 supplies a three-phase alternating current to the power device 90. The power device 90 is a power load that operates using a three-phase alternating current as a power source. As an example of the electric power device 90, for example, an elevator installed in a building or a condominium can be cited.

  The power supply system 1 includes three vehicles 10, 20, 30, three power cables 40, 50, 60, a supply device 70, and a power supply line 80. Supply device 70 is electrically connected to vehicles 10, 20, and 30 via power cables 40, 50, and 60, respectively, and is electrically connected to power device 90 via power supply line 80.

  Each of the vehicles 10, 20, and 30 is an electric vehicle (an electric vehicle, a hybrid vehicle, a fuel cell vehicle, etc.) using a motor (not shown) as a driving force source.

  The vehicle 10 includes a power storage unit 11, an inverter (generation unit) 12, an inlet 13, a control unit 14, and a wireless communication unit 15. The power storage unit 11 is a secondary battery configured to be able to charge and discharge electric power with a motor. Inverter 12 receives discharge power from power storage unit 11 to generate single-phase AC power, and outputs the generated single-phase AC power to inlet 13. The control unit 14 is configured to be capable of receiving a power supply requesting operation (an operation for requesting the supply of three-phase alternating current from the power supply system 1 to the power device 90) by the user and to be able to control the inverter 12.

  The wireless communication unit 15 is connected to the control unit 14 and configured to be able to wirelessly communicate with other vehicles 20 and 30.

  The vehicle 20 includes a power storage unit 21, an inverter (generation unit) 22, an inlet 23, a control unit 24, and a wireless communication unit 25. The vehicle 30 includes a power storage unit 31, an inverter (generation unit) 32, an inlet 33, a control unit 34, and a wireless communication unit 35. Since the configurations of the vehicles 20 and 30 are the same as the corresponding configurations of the vehicle 20, a detailed description thereof will not be repeated here.

  The power cable 40 includes two power lines 41 and 42 and two connectors 43 and 44. The connector 43 is configured to be detachable from the inlet 13 of the vehicle 10. The connector 44 is configured to be detachable from the connector C1 of the supply device 70.

  The power cable 50 includes two power lines 51 and 52 and two connectors 53 and 54. The power cable 60 includes two power lines 61 and 62 and two connectors 63 and 64. Since each structure of the power cables 50 and 60 is the same as the corresponding structure of the power cable 40, detailed description thereof will not be repeated here.

  Supply device 70 includes connectors C1, C2, C3 to which power cables 40, 50, 60 are connected, respectively, and power lines L1-L4. Power line L1 has one end connected to connector C1 and the other end connected to power device 90. Power line L2 has one end connected to connector C2 and the other end connected to power device 90. Power line L3 has one end connected to connector C3 and the other end connected to power device 90. Power line L4 is connected to connectors C1, C2, and C3.

  In a state where power cables 40, 50, and 60 are connected to connectors C1, C2, and C3, respectively, vehicle 10 is connected to power device 90 via power line 41 and power line L1, and vehicle 20 is connected to power line 51 and power line L2. The vehicle 30 is connected to the power device 90 via the power line 61 and the power line L3. Further, the power lines 42, 52, 62 are connected to each other by a power line L4.

  The power supply line 80 includes three power lines L1, L2, and L3 that connect the supply device 70 and the power device 90.

<Supplying three-phase alternating current from the power supply system to power equipment>
Each of the three vehicles 10, 20, and 30 included in the power feeding system 1 can output single-phase alternating current alone, but cannot output three-phase alternating current. Therefore, each vehicle cannot be used alone as a power source for power device 90 that operates using a three-phase alternating current as a power source.

  Therefore, the vehicles 10, 20, and 30 (more specifically, the control units 14, 24, and 34 of each vehicle) perform wireless communication with other vehicles by the wireless communication units 15, 25, and 35, respectively. The same reference phase is shared with other vehicles, and using the reference phase, inverters (generators) 12, 22, and 32 are used so that the phases of the three single-phase alternating currents generated by each vehicle are shifted from each other by 120 degrees. To control. Supply device 70 combines the three single-phase alternating currents input from the respective vehicles and outputs the combined three-phase alternating current to power device 90. Thus, the power feeding system 1 can generate a three-phase alternating current from the three vehicles 10, 20, and 30 that each generate a single-phase alternating current, and supply the generated three-phase alternating current to the power device 90.

  In FIG. 2, each vehicle 10, 20, 30 (more specifically, each vehicle control unit 14, 24, 34) performs when starting the supply of three-phase alternating current from the power supply system 1 to the power device 90. It is a flowchart which shows an example of a process sequence.

  Each vehicle 10, 20, 30 determines whether or not a power supply request operation (operation for requesting the supply of three-phase alternating current from power supply system 1 to power device 90) has been performed by the user (S 10, S 20, S 30). . For example, the vehicles 10, 20, and 30 determine that the power supply request operation has been performed when the user performs an operation of connecting the vehicles 10, 20, and 30 to the supply device 70 using the power cables 40, 50, and 60. To do.

  When power supply request operation is performed (YES in S10), vehicle 10 starts communication with other vehicles 20, 30 using wireless communication unit 15 (S11). Similarly, when power supply request operation is performed (YES in S20), vehicle 20 starts communication with other vehicles 10 and 30 using wireless communication unit 25 (S21), and vehicle 30 performs power supply request operation. Is carried out (YES in S30), communication with other vehicles 10, 20 is started using wireless communication unit 35 (S31).

  Thereafter, any one of the three vehicles 10, 20, and 30 is set as a master vehicle, and the remaining two vehicles are set as a first slave vehicle and a second slave vehicle, respectively. In the example shown in FIG. 2, the vehicle 10 is set as a master vehicle, the vehicle 20 is set as a first slave vehicle, and the vehicle 30 is set as a second slave vehicle. In this example, the vehicle 10 notifies the other vehicles 20, 30 that it is a master vehicle (S12), and the vehicle 20 notifies the other vehicles 10, 30 that it is a first slave vehicle. Then, the vehicle 30 notifies the other vehicles 10 and 20 that it is a second slave vehicle (S32).

  The master vehicle 10 sets a signal including a three-phase AC reference phase (hereinafter also referred to as “reference phase signal”) and transmits the set reference phase signal to the first slave vehicle 20 and the second slave vehicle 30 ( S13). The first slave vehicle 20 and the second slave vehicle 30 receive the reference phase signal from the master vehicle 10 (S23, S33). Thus, the vehicles 10, 20, and 30 share the same reference phase signal.

  Thereafter, the master vehicle 10 outputs a single-phase AC W1 having a reference phase (S14). Specifically, the control unit 14 controls the inverter 12 so that the inverter 12 generates the single-phase AC W1 having the reference phase.

  The first slave vehicle 20 outputs the single-phase AC W2 that is shifted by 120 degrees from the reference phase (S24). Specifically, the control unit 24 controls the inverter 22 so that the inverter 22 generates a single-phase AC W2 that is shifted by 120 degrees from the reference phase.

  The second slave vehicle 30 outputs the single-phase AC W3 that is shifted by 240 degrees from the reference phase (S34). Specifically, the control unit 34 controls the inverter 32 so as to generate a single-phase alternating current W3 shifted by 240 degrees from the reference phase.

  FIG. 3 is a diagram schematically showing waveforms of single-phase alternating currents W1, W2, and W3 generated by vehicles 10, 20, and 30, and waveforms of three-phase alternating current supplied from power supply system 1 to power device 90. . As shown in FIG. 3, the vehicle 10 outputs a single-phase alternating current W1 having a reference phase, the vehicle 20 outputs a single-phase alternating current W2 that is shifted by 120 degrees from the reference phase, and the vehicle 30 is a single phase that is shifted by 240 degrees from the reference phase. The phase alternating current W3 is output. And these single phase alternating current W1, W2, W3 is combined in the supply apparatus 70, and is output to the electric power apparatus 90 as 3 phase alternating current. Thus, the power feeding system 1 can generate a three-phase alternating current from the three vehicles 10, 20, and 30 that each generate a single-phase alternating current, and supply the generated three-phase alternating current to the power device 90.

  As described above, the control units 14, 24, and 34 of the three vehicles included in the power feeding system 1 according to the present embodiment perform wireless communication with other vehicles by the wireless communication units 15, 25, and 35. Share the same reference phase with other vehicles, and using the reference phase, inverters 12, 22, and so that the phases of the three single-phase alternating currents W1, W2, and W3 generated by each vehicle are shifted from each other by 120 degrees. 32 is controlled. Supply device 70 combines three single-phase alternating currents W1, W2, and W3 input from the respective vehicles and outputs the combined three-phase alternating current to power device 90. Thus, the power feeding system 1 can generate a three-phase alternating current from the three vehicles 10, 20, and 30 that each generate a single-phase alternating current, and supply the generated three-phase alternating current to the power device 90.

<Modification 1>
In the above-described embodiment, an example in which wireless communication is performed between vehicles has been described. However, communication performed between vehicles may be wired communication. Examples of wired communication methods include HLC communication (HLC: High Level Communication) and PLC communication (Power Line Communication, power line communication).

  FIG. 4 is a schematic configuration diagram of a power feeding system 1A provided with means for each vehicle to perform HLC communication. The power supply system 1A includes three vehicles 10A, 20A, and 30A, three power cables 40A, 50A, and 60A, a supply device 70A, and a power supply line 80. The HLC communication is bidirectional digital wired communication performed between the vehicles 10A, 20A, and 30A.

  The vehicle 10A does not include the wireless communication unit 15 as compared with the vehicle 10 shown in the above-described embodiment, and includes an HLC circuit 16 and a control pilot circuit (hereinafter referred to as “CPLT circuit”) 17 instead. Similarly, the vehicle 20A does not include the wireless communication unit 25 as compared with the vehicle 20 shown in the above-described embodiment, and includes an HLC circuit 26 and a CPLT circuit 27 instead. The vehicle 30A does not include the wireless communication unit 35 as compared with the vehicle 30 shown in the above-described embodiment, and includes an HLC circuit 36 and a CPLT circuit 37 instead.

  Power cables 40A, 50A, and 60A further include pilot lines 45, 55, and 65, respectively, compared to power cables 40, 50, and 60 described in the above-described embodiment.

  70 A of supply apparatuses are further provided with the connection line L5 compared with the supply apparatus 70 shown in the above-mentioned embodiment. In a state where the power cables 40A, 50A, 60A are connected to the supply device 70A, the pilot lines 45, 55, 65 are connected to each other by the connection line L5.

  Since other configurations are the same as those of the above-described embodiment, detailed description thereof will not be repeated here.

  CPLT circuits 17, 27, and 37 output control pilot signals that oscillate at a predetermined cycle to pilot lines 45, 55, and 65, respectively. The HLC circuits 17, 27, and 37 communicate with each other by superimposing communication signals on the pilot lines 45, 55, and 65 connected to each other by the connection line L5.

  In the power feeding system 1A having the above configuration, the same reference phase can be shared between the vehicles by performing wired communication by HLC communication between the vehicles.

  FIG. 5 is a schematic configuration diagram of a power feeding system 1B provided with means for each vehicle to perform PLC communication. The power supply system 1B includes three vehicles 10B, 20B, and 30B, three power cables 40, 50, and 60, a supply device 70, and a power supply line 80.

  Compared to vehicle 10 shown in the above-described embodiment, vehicle 10B does not include wireless communication unit 15, but includes PLC circuit 18 instead. Similarly, vehicle 20B does not include wireless communication unit 25 as compared to vehicle 20 shown in the above-described embodiment, and includes PLC circuit 28 instead. The vehicle 30B does not include the wireless communication unit 35 as compared to the vehicle 30 shown in the above-described embodiment, and includes a PLC circuit 38 instead. Since other configurations are the same as those of the above-described embodiment, detailed description thereof will not be repeated here.

  The PLC circuits 18, 28, and 38 perform PLC communication (power line communication) using the power lines 42, 52, and 62 connected to each other by the power line L4.

  In the power feeding system 1B having the above configuration, the same reference phase can be shared between the vehicles by performing wired communication by PLC communication between the vehicles.

<Modification 2>
In the above-described embodiment, the example in which the master vehicle 10 among the three vehicles 10, 20, and 30 sets the reference phase by itself and transmits the reference phase to the other vehicles 20 and 30 has been described. The transmission may be performed on the supply device side.

  FIG. 6 is a schematic configuration diagram of a power feeding system 1C that performs setting and transmission of a reference phase signal on the supply device side. The power supply system 1 </ b> C includes three vehicles 10, 20, 30, three power cables 40, 50, 60, a supply device 70 </ b> C, and a power supply line 80.

  70 C of supply apparatuses are further provided with the control part 100 comprised with respect to the supply apparatus 70 so that wireless communication with the vehicles 10, 20, and 30 was possible.

  Control unit 100 sets a reference phase when a power supply request operation is performed by the user, performs wireless communication with vehicles 10, 20, and 30 and transmits a reference phase signal to vehicles 10, 20, and 30.

  In the power feeding system 1 </ b> C having the above-described configuration, the reference phase set on the supply device 70 </ b> C side can be shared between the vehicles 10, 20, and 30. Then, the vehicle 10 outputs a single-phase alternating current W1 having a reference phase as a master vehicle, the vehicle 20 outputs a single-phase alternating current W2 shifted by 120 degrees from the reference phase as a first slave vehicle, and the vehicle 30 serves as a second slave vehicle. A single-phase alternating current W3 shifted by 240 degrees from the reference phase is output. Thereby, 1 C of electric power feeding systems generate | occur | produce three-phase alternating current from the three vehicles 10, 20, and 30 which each generate | occur | produce single phase alternating current similarly to the above-mentioned embodiment, and electric power apparatus 90 produces | generates the produced | generated three-phase alternating current. Can be supplied to.

  Further, the above-described embodiment and its modifications 1 and 2 can be appropriately combined within a range where no technical contradiction arises.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1, 1A, 1B, 1C Power supply system 10, 10A, 10B, 20, 20A, 20B, 30, 30A, 30B Vehicle, 11, 21, 31 Power storage unit, 14, 24, 34, 100 Control unit, 12, 22 , 32 Inverter, 13, 23, 33 Inlet, 15, 25, 35 Wireless communication unit, 16, 26, 36 HLC circuit, 17, 27, 37 CPLT circuit, 18, 28, 38 PLC circuit, 40, 40A, 50, 50A, 60, 60A power cable, 41, 42, 51, 52, 61, 62, L1, L2, L3, L4 power line, L5 connection line, 45, 55, 65 pilot line, 70, 70A, 70C supply device, 80 Feed line, 90 power equipment.

Claims (1)

A power supply system capable of supplying a three-phase alternating current to a power load,
With three vehicles,
Each of the three vehicles is
A power storage unit;
A generator that receives electric power from the power storage unit and generates a single-phase alternating current;
A control unit for controlling the generation unit;
Including a communication unit that communicates with the outside,
The control unit shares the same reference phase with the other vehicles by communication with the outside by the communication unit, and uses the reference phase to generate three single phases respectively generated by the three vehicles. Controlling the generating unit so that the phases of alternating current are shifted from each other by 120 degrees;
The power feeding system is further electrically connected to the three vehicles and the power load, and combines the three single-phase alternating currents respectively input from the three vehicles into the power load as a three-phase alternating current. A power supply system including a supply device for outputting.

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