Power line connection device, power output system, power output method, program, and storage medium

Abstract

To provide a power line connection device, a power output system, a power output method, a program, and a storage medium for synthesizing single-phase AC power supplied from three power feeders to generate three-phase AC power.SOLUTION: A power output system including a collector box 10 which is a power line connection device, includes: a first connector 36 to a third connector 40 that are electrically connected to a first power feeder to a third power feeder electrically connected to three vehicles; and an output terminal 108 electrically connected to an external load. The output terminal 108 outputs three-phase AC power including single-phase AC power of U-phase to V-phase input from the first power feeder to the third power feeder to the first connector 36 to the third connector 40.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a power line connection device, a power output system, a power output method, a program, and a storage medium. [Background technology]

[0002] Patent Document 1 discloses a power supply control device (power line connection device) connected to three power supply devices. The power supply control device generates three-phase AC power by combining single-phase AC power supplied from the three power supply devices. The power supply control device outputs the generated three-phase AC power to an external load. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-39705 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 does not disclose a specific configuration of the power supply control device, and therefore there is room for improvement.

[0005] An object of the present invention is to solve the above-mentioned problems. [Means for solving the problem]

[0006] A first aspect of the present invention is a power line connection device comprising: a first input terminal to which a first power feeder that outputs single-phase AC power of a first phase is electrically connected; a second input terminal to which a second power feeder that outputs single-phase AC power of a second phase is electrically connected; a third input terminal to which a third power feeder that outputs single-phase AC power of a third phase is electrically connected; and an output terminal that outputs three-phase AC power including the single-phase AC power of the first phase to the third phase input from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively, and to which an external load or power device is electrically connected.

[0007] A second aspect of the present invention is a power output system including a first power supply device that outputs single-phase AC power of a first phase, a second power supply device that outputs single-phase AC power of a second phase, a third power supply device that outputs single-phase AC power of a third phase, and a power line connection device having a first input terminal to which the first power supply device is electrically connected, a second input terminal to which the second power supply device is electrically connected, a third input terminal to which the third power supply device is electrically connected, and an output terminal to which an external load or power device is electrically connected.

[0008] A third aspect of the present invention is a power output method comprising the steps of outputting a first-phase single-phase AC power from a first power feeder, outputting a second-phase single-phase AC power from a second power feeder, outputting a third-phase single-phase AC power from a third power feeder, and inputting the first-phase to third-phase single-phase AC powers output from the first power feeder to the third power feeder, respectively, to an output device, and outputting three-phase AC power including the first-phase to third-phase single-phase AC powers from the output device.

[0009] A fourth aspect of the present invention is a program for causing a computer to execute the power output method according to the third aspect.

[0010] A fifth aspect of the present invention is a storage medium for storing the program. Effect of the Invention

[0011] According to the present invention, three-phase AC power is generated by combining three single-phase AC powers input to the first input terminal to the third input terminal, and the generated three-phase AC power is output from the output terminal to the outside (load or power device). This makes it possible to output the three-phase AC power to the outside with a simple configuration. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a configuration diagram of a power output system including a current collecting box according to this embodiment. [Diagram 2] FIG. 2 is a circuit diagram of the three feeders of FIG. [Diagram 3] FIG. 3 is a circuit diagram of the current collecting box of FIG. [Figure 4] FIG. 4 is a side view of the current collecting box of FIG. [Diagram 5] FIG. 5 is a plan view of the current collecting box of FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a flowchart showing the operation of the power output system including the collecting box of FIG. [Figure 8] FIG. 8 is a timing chart when each of the single-phase AC voltages of the U phase, V phase, and W phase is normal. [Figure 9] FIG. 9 is a timing chart when the U-phase single-phase AC voltage is in reverse phase. [Figure 10] FIG. 10 is a timing chart when the U-phase single-phase AC voltage is in an open phase state. [Figure 11] FIG. 11 is a timing chart when the U-phase single-phase AC voltage is unbalanced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] FIG. 1 is a configuration diagram of a power output system 12 including a power collection box 10 (power line connection device) according to this embodiment. The power output system 12 includes the power collection box 10, three power feeders 14, and three vehicles 22. The power output system 12 is used, for example, outdoors. The power collection box 10 is a portable box. The three power feeders 14 are portable power feeders (power devices, power output devices). In the following description, the three power feeders 14 may be referred to as a first power feeder 16, a second power feeder 18, and a third power feeder 20.

[0014] The three vehicles 22 may be various vehicles such as a one-wheeled vehicle, a two-wheeled vehicle, a three-wheeled vehicle, a four-wheeled vehicle, etc., each having a battery (not shown). In addition, the vehicles 22 may be various vehicles such as an electric vehicle (electric car) having a battery, a hybrid vehicle, etc.

[0015] The three power feeders 14 are electrically connected to the three vehicles 22. That is, the three power feeders 14 have cables 24 extending from the power feeders 14. Connectors 26 are provided at the ends of the cables 24. The connectors 26 of the three power feeders 14 are connected to connectors (not shown) of any of the vehicles 22. FIG. 1 illustrates a case in which the connectors 26 of the three power feeders 14 are male connectors and the connectors of the three vehicles 22 are female connectors. The male connector is called a plug. The female connector is called a receptacle. As described above, since the power output system 12 is used outdoors, it is desirable that the cable 24 be a waterproof and durable cable. An example of the cable 24 is a vinyl cab-tyre cable (VCT).

[0016] The current collecting box 10 is connected to three power feeders 14 and can be connected to an external load 28. That is, the current collecting box 10 has four cables 30 extending therefrom. As described above, since the power output system 12 is used outdoors, it is desirable that the four cables 30 are waterproof and durable cables. An example of the cable 30 is a VCT. Note that an example of the load 28 is a distribution board for a house, and various electrical facilities such as electrical equipment electrically connected to the distribution board. Alternatively, an example of the load 28 is various electrical loads such as power consuming equipment.

[0017] Of the four cables 30, three cables 30 are input cables 32. Connectors 34 (input terminals) are provided at the ends of the three input cables 32. The three connectors 34 are connected to three power feeders 14. FIG. 1 illustrates a case where the three connectors 34 of the current collection box 10 are male connectors.

[0018] In the following description, the connector 34 connected to the first power supply device 16 may be referred to as a first connector 36 (first input terminal). The connector 34 connected to the second power supply device 18 may be referred to as a second connector 38 (second input terminal). The connector 34 connected to the third power supply device 20 may be referred to as a third connector 40 (third input terminal).

[0019] Of the four cables 30, the remaining cable 30 is an output cable 42. The output cable 42 is a cable for connecting the current collecting box 10 and the load 28.

[0020] 2 shows a circuit diagram of the three power supplies 14. The three power supplies 14 have the same configuration. Each of the three power supplies 14 further includes two converters 50, two inverters 52, a breaker 54, and a connector 56.

[0021] The two converters 50 are DC / DC converters. The input sides (primary sides) of the two converters 50 are electrically connected to the connector 26. The two converters 50 are electrically connected in parallel to the connector 26. The output sides (secondary sides) of the two converters 50 are electrically connected to the inverters 52. The two inverters 52 are electrically connected to the connector 56 via the breakers 54. The connector 56 is connected to the connector 34 of the current collecting box 10. The connector 56 is a female connector. The connector 56 has four terminals (first terminal 62 to fourth terminal 68). The connector 26 of the current collecting box 10 (see FIG. 1) has four terminals (first terminal 72 to fourth terminal 78) connected to the four terminals.

[0022] The positive electrode on the output side of one inverter 52 is electrically connected to a first terminal 62 of a connector 56 via a breaker 54. The negative electrode on the output side of one inverter 52 and the negative electrode on the output side of the other inverter 52 are electrically connected to a second terminal 64 of the connector 56 via the breaker 54. The positive electrode on the output side of the other inverter 52 is electrically connected to a third terminal 66 of the connector 56 via the breaker 54. In addition, a fourth terminal 68 of the connector 56 is grounded.

[0023] Each of the three power feeders 14 can convert DC power supplied from the battery of the vehicle 22 into single-phase AC power (single-phase AC power) and output the converted power when the connector 26 is connected to a connector (not shown) of the vehicle 22 (see FIG. 1). That is, the two converters 50 convert the DC voltage supplied from the battery of the vehicle 22 via the connector 26 into a desired DC voltage. The two inverters 52 convert the converted DC voltage into an AC voltage (single-phase AC voltage). In other words, the two inverters 52 convert the DC power into single-phase AC power (single-phase AC power). The two inverters 52 output the single-phase AC power to the connector 56 via the breaker 54.

[0024] As described above, each of the three power feeders 14 has two inverters 52. Therefore, each of the three power feeders 14 outputs two-phase single-phase AC power to the power collection box 10 (see FIG. 1). As will be described later, the power collection box 10 combines the single-phase AC power (single-phase AC power of U-phase, V-phase, and W-phase) supplied from the three power feeders 14 to generate three-phase AC power (three-phase AC power).

[0025] Here, the function of each of the inverters 52 in the first power feeder 16 to the third power feeder 20 will be specifically described.

[0026] The first power supply device 16 outputs single-phase AC power of U phase (first phase) and V phase (fourth phase) of the three-phase AC power. In this case, one inverter 52 (U-phase inverter 82) generates single-phase AC power of U phase. The generated single-phase AC power of U phase is output to the first terminal 62 of the connector 56. The other inverter 52 (V-phase inverter 84) generates single-phase AC power of V phase. The generated single-phase AC power of V phase is output to the third terminal 66 of the connector 56. Therefore, the first power supply device 16 can output each of the single-phase AC power of U phase and V phase to the power collection box 10 when the connector 56 and the first connector 36 of the power collection box 10 are connected.

[0027] The second power supply device 18 outputs V-phase (second phase) and W-phase (fifth phase) single-phase AC power of the three-phase AC power. In this case, one inverter 52 (V-phase inverter 86) generates V-phase single-phase AC power. The generated V-phase single-phase AC power is output to the first terminal 62 of the connector 56. The other inverter 52 (W-phase inverter 88) generates W-phase single-phase AC power. The generated W-phase single-phase AC power is output to the third terminal 66 of the connector 56. Therefore, the second power supply device 18 can output each of the V-phase and W-phase single-phase AC power to the power collection box 10 when the connector 56 and the second connector 38 of the power collection box 10 are connected.

[0028] The third power supply device 20 outputs W-phase (third phase) and U-phase (sixth phase) single-phase AC power of the three-phase AC power. In this case, one inverter 52 (W-phase inverter 90) generates W-phase single-phase AC power. The generated W-phase single-phase AC power is output to the first terminal 62 of the connector 56. The other inverter 52 (U-phase inverter 92) generates U-phase single-phase AC power. The generated U-phase single-phase AC power is output to the third terminal 66 of the connector 56. Therefore, the third power supply device 20 can output each of the W-phase and U-phase single-phase AC power to the power collection box 10 when the connector 56 and the third connector 40 of the power collection box 10 are connected.

[0029] 3 is a circuit diagram of the current collecting box 10. The current collecting box 10 further includes a terminal block 100 (connection portion), a breaker 102 (interruption portion), a relay 104, a tripping portion 106 (another interruption portion), and an output terminal 108.

[0030] The output terminal 108 is provided at the tip of the output cable 42. The output terminal 108 has four terminals (a U-phase terminal 110, a V-phase terminal 112, a W-phase terminal 114, and a ground terminal 116). The four terminals are connected to the load 28 (see FIG. 1).

[0031] The space between the first connector 36 (see FIGS. 1 and 2) and the output terminal 108 is configured as a first electrical transmission path 120. The space between the second connector 38 and the output terminal 108 is configured as a second electrical transmission path 122. The space between the third connector 40 and the output terminal 108 is configured as a third electrical transmission path 124. The electrical transmission path from the first electrical transmission path 120 to the breaker 102 via the relay 104 and the tripping unit 106 is configured as a fourth electrical transmission path 126. Each of the first to fourth electrical transmission paths 120 to 126 is configured from a plurality of power lines 128.

[0032] The terminal block 100 and the breaker 102 are arranged in the first electrical transmission path 120 to the third electrical transmission path 124. In this case, the terminal block 100 and the breaker 102 are arranged in order from the first connector 36 to the third connector 40 toward the output terminal 108.

[0033] Each of the first to third electrical transmission paths 120 to 124 has a power line 128 connecting the first to third connectors 36 to 40 and the terminal block 100, a power line 128 connecting the terminal block 100 and the breaker 102, and a power line 128 connecting the breaker 102 and the output terminal 108. In other words, the terminal block 100 electrically connects the multiple power lines 128 between the first to third connectors 36 to 40 and the terminal block 100, and the multiple power lines 128 between the terminal block 100 and the breaker 102. The breaker 102 electrically connects the multiple power lines 128 between the terminal block 100 and the breaker 102, and the multiple power lines 128 between the breaker 102 and the output terminal 108.

[0034] The terminal block 100 is composed of a plurality of connection parts. That is, the terminal block 100 has a U-phase connection part 130 (first connection part), a V-phase connection part 132 (second connection part), a W-phase connection part 134 (third connection part), and an N-phase connection part 136. Each connection part has two input terminals 138 and two output terminals 140. In each connection part, the input terminal 138 and the output terminal 140 facing each other are electrically connected. In each connection part, the two output terminals 140 are electrically connected by a short bar 142.

[0035] The U-phase connection unit 130 is electrically connected to the power line 128 that transmits the single-phase AC power of the U-phase (first phase, fourth phase) among the first connector 36 to the third connector 40. Specifically, one input terminal 138 of the U-phase connection unit 130 is electrically connected to the first terminal 62 (U-phase inverter 82) of the connector 56 of the first power feeder 16 via the first connector 36 (see FIG. 2). The other input terminal 138 of the U-phase connection unit 130 is electrically connected to the third terminal 66 (U-phase inverter 92) of the connector 56 of the third power feeder 20 via the third connector 40. One output terminal 140 of the U-phase connection unit 130 is electrically connected to the relay 104. The other output terminal 140 of the U-phase connection unit 130 is electrically connected to the U-phase terminal 110 of the output terminal 108 via the breaker 102.

[0036] The V-phase connection portion 132 is electrically connected to the power line 128 that transmits the single-phase AC power of the V-phase (second phase, fifth phase) among the first connector 36 to the third connector 40. Specifically, one input terminal 138 of the V-phase connection portion 132 is electrically connected to the first terminal 62 (V-phase inverter 86) of the connector 56 of the second power feeder 18 via the second connector 38 (see FIG. 2). The other input terminal 138 of the V-phase connection portion 132 is electrically connected to the third terminal 66 (V-phase inverter 84) of the connector 56 of the first power feeder 16 via the first connector 36. One output terminal 140 of the V-phase connection portion 132 is electrically connected to the relay 104. The other output terminal 140 of the V-phase connection portion 132 is electrically connected to the V-phase terminal 112 of the output terminal 108 via the breaker 102.

[0037] The W-phase connection unit 134 is electrically connected to the power line 128 that transmits the W-phase (third phase, sixth phase) single-phase AC power among the first connector 36 to the third connector 40. Specifically, one input terminal 138 of the W-phase connection unit 134 is electrically connected to the first terminal 62 (W-phase inverter 90) of the connector 56 of the third power feeder 20 via the third connector 40 (see FIG. 2). The other input terminal 138 of the W-phase connection unit 134 is electrically connected to the third terminal 66 (W-phase inverter 88) of the connector 56 of the second power feeder 18 via the second connector 38. One output terminal 140 of the W-phase connection unit 134 is electrically connected to the relay 104. The other output terminal 140 of the W-phase connection unit 134 is electrically connected to the W-phase terminal 114 of the output terminal 108 via the breaker 102.

[0038] The N-phase connection unit 136 is electrically connected to the power line 128 at the neutral point (N-phase) among the first connector 36 to the third connector 40. Specifically, one input terminal 138 of the N-phase connection unit 136 is electrically connected to the second terminal 64 of the connector 56 of the second power feeder 18 via the second connector 38. The other input terminal 138 of the N-phase connection unit 136 is electrically connected to the second terminal 64 of the connector 56 of the third power feeder 20 via the third connector 40. One output terminal 140 of the N-phase connection unit 136 is electrically connected to the second terminal 64 of the connector 56 of the first power feeder 16 via the first connector 36. The other output terminal 140 of the N-phase connection unit 136 is electrically connected to the tripping unit 106.

[0039] As described above, the relay 104 is electrically connected to the U-phase connection portion 130, the V-phase connection portion 132, and the W-phase connection portion 134. Therefore, the relay 104 is supplied with single-phase AC power of U-phase to W-phase. The relay 104 is driven by receiving the supply of single-phase AC power of U-phase. The relay 104 has a microcomputer 150 (computer), a detection portion 154, and a switching portion 158. The microcomputer 150 realizes the function of the control portion 156 by executing a program stored in the memory 152 (storage medium). The microcomputer 150 is connected to the detection portion 154 and the switching portion 158 so as to be able to communicate with each other.

[0040] The detection unit 154 sequentially detects (monitors) the single-phase AC power of phases U to W. More specifically, the detection unit 154 sequentially detects the single-phase AC voltage of phases U to V. The detection unit 154 sequentially outputs the detection results to the control unit 156 of the microcomputer 150.

[0041] Based on the U-phase to W-phase single-phase AC power (single-phase AC voltage) detected by the detection unit 154, the control unit 156 determines whether or not an abnormality has occurred in the quality of the U-phase to W-phase single-phase AC power.

[0042] Specifically, when the current collecting box 10 generates three-phase AC power by combining single-phase AC power of U phase to W phase, the control unit 156 determines whether or not a reverse phase occurs in the single-phase AC power of at least one phase. The control unit 156 also determines whether or not a loss of phase occurs in the single-phase AC power of at least one phase. Furthermore, the control unit 156 determines whether or not a voltage imbalance occurs in the single-phase AC power of at least one phase. If at least one abnormality among the reverse phase, loss of phase, and voltage imbalance occurs, the control unit 156 determines that an abnormality has occurred in the quality of the single-phase AC power of U phase to W phase.

[0043] The control unit 156 may determine the presence or absence of at least one of the abnormalities of reverse phase, missing phase, and voltage imbalance. The term "abnormality" is a concept that includes a state or aspect that is different from normal. The term "fault" described later is a concept that includes a state or aspect that is worse than an abnormality.

[0044] The control unit 156 controls the switching unit 158 ​​based on the above-mentioned determination result.

[0045] The switching unit 158 ​​is responsible for the on / off function of the relay 104. Based on a switching instruction signal from the control unit 156, the switching unit 158 ​​switches between supplying and not supplying U-phase single-phase AC power to the tripping unit 106.

[0046] Specifically, when it is determined that no abnormality has occurred in the quality of the U-phase to W-phase single-phase AC power, the control unit 156 supplies a switching instruction signal to the switching unit 158 ​​to turn on the relay 104. Based on the switching instruction signal from the control unit 156, the switching unit 158 ​​turns on the relay 104 and starts supplying the U-phase single-phase AC power to the tripping unit 106.

[0047] Furthermore, when it is determined that an abnormality has occurred in the quality of the U-phase to W-phase single-phase AC power, the control unit 156 supplies a switching instruction signal to the switching unit 158 ​​to turn off the relay 104. Based on the switching instruction signal from the control unit 156, the switching unit 158 ​​turns off the relay 104 and stops (cuts off) the supply of the U-phase single-phase AC power to the tripping unit 106.

[0048] The tripping unit 106 is driven by the supply of U-phase single-phase AC power from the switching unit 158. If the value of the U-phase single-phase AC power supplied from the switching unit 158 ​​is equal to or greater than a predetermined value, the tripping unit 106 supplies the single-phase AC power to the breaker 102. If the value of the U-phase single-phase AC power supplied from the switching unit 158 ​​is less than a predetermined value, the tripping unit 106 stops (cuts off) the supply of the single-phase AC power to the breaker 102. In other words, the tripping unit 106 controls the conduction or cut-off of the fourth electrical transmission path 126. Note that, for example, the value of the U-phase single-phase AC power may be the value of the U-phase active power. The switching unit 158 ​​may supply or not supply the U-phase single-phase AC power to the breaker 102 based on a comparison between an effective value or a maximum value of the U-phase single-phase AC voltage and a predetermined value.

[0049] The breaker 102 has a lever 160 and a breaker unit 162. The lever 160 is an operating element operated by a user. When the user operates the lever 160, the input side and the output side of the breaker 102 are switched from a cut-off state to a connection state. When U-phase single-phase AC power is supplied from the tripping unit 106, the breaker unit 162 allows the input side and the output side of the breaker 102 to be in a connection state. When U-phase single-phase AC power is not supplied from the tripping unit 106, the breaker unit 162 cuts off the input side and the output side of the breaker 102. Therefore, when U-phase single-phase AC power is not supplied from the tripping unit 106, even if the user operates the lever 160, the breaker unit 162 maintains the input side and the output side of the breaker 102 in a cut-off state.

[0050] As described above, the U-phase connection part 130, the V-phase connection part 132, and the W-phase connection part 134 are electrically connected to the input side of the breaker 102. Therefore, when the input side and the output side of the breaker 102 are in a connected state, if single-phase AC power of U phase to W phase is supplied to the breaker 102 from the U-phase connection part 130, the V-phase connection part 132, and the W-phase connection part 134, the breaker 102 outputs each of the supplied single-phase AC powers as it is to the output terminal 108. In other words, the breaker 102 outputs each of the single-phase AC powers to the output terminal 108 as three-phase AC power. That is, the breaker 102 generates three-phase AC power by combining the single-phase AC powers of U phase, V phase, and W phase.

[0051] Next, the specific structure of the current collecting box 10 will be described with reference to FIGS.

[0052] The current collecting box 10 has a housing 170. The housing 170 has a housing body 172 (first member) and a cover 174 (second member). The housing body 172 is a resin box with one surface (top surface) open. The cover 174 is a lid for closing the opening of the housing body 172. That is, the cover 174 covers the opening of the housing body 172. The cover 174 has a transparent transmission part 176 that transmits light inside and outside the housing 170. The transmission part 176 is provided so as to face the opening of the housing body 172. The entire cover 174 may be the transmission part 176. Alternatively, a part of the cover 174 may be configured as the transmission part 176. For example, a part of the cover 174 that covers the opening of the housing body 172 (a part inside the outer edge of the cover 174) is configured as the transmission part 176. The cover 174 can be opened and closed with respect to the housing body 172. Housing 170 further has a lock section 177. Lock section 177 locks housing body 172 and cover 174 together so that they cannot be opened or closed when the opening of housing body 172 is closed by cover 174. In other words, lock section 177 locks housing body 172 and cover 174 so that they cannot be opened.

[0053] The outer edge of the upper end of the housing body 172 and the outer edge of the cover 174 are provided with a sealing portion 175, which is an annular waterproof structure. That is, a flange 178 is formed on the outer edge of the upper end of the housing body 172. A protruding portion 180 that protrudes upward is formed on the edge of the flange 178. An annular protrusion 182 is provided on the upper surface of the flange 178. A flange 183 is formed on the outer edge of the cover 174. An annular recess 184 is formed on the bottom of the flange 183. When the cover 174 is closed on the housing body 172, the flange 183 of the cover 174 abuts against the flange 178 of the housing body 172 inside the protruding portion 180 of the housing body 172. The protrusion 182 is located inside the recess 184 of the flange 183. An annular rubber seal 186 (sealing member) is arranged in the internal space formed by the protrusion 182 and the recess 184. This makes it possible to prevent water or the like from entering the inside of housing 170 from the outside through the gap between housing body 172 and cover 174.

[0054] A plurality of anti-slip portions 190 are provided on the bottom surface (surface facing vertically downward) of the housing main body 172. The anti-slip portions 190 are, for example, rubber feet.

[0055] The three input cables 32 are drawn out from one side wall of the housing body 172 to the outside. The output cable 42 is drawn out from the other side wall of the housing body 172 to the outside. Each of the three input cables 32 and the output cable 42 is fixed to the side wall of the housing body 172 by a cable lock unit 200. Each of the four cable lock units 200 fixes the cable 30 (input cable 32, output cable 42) and has a waterproof structure to prevent water and the like from entering the inside of the housing 170 from the outside.

[0056] That is, the cable lock unit 200 has a lock body 202, a cap 204, a lock nut 206, a rubber sleeve 208, and a rubber seal 210. The lock body 202 is a tube through which the input cable 32 or the output cable 42 is inserted. The lock body 202 is fixed to the housing body 172 by the lock nut 206. The rubber seal 186 is interposed between the flange of the lock body 202 and the side wall of the housing body 172. The input cable 32 or the output cable 42 is inserted into the cap 204. A screw is provided on the inside of the cap 204. With the input cable 32 or the output cable 42 inserted into the cap 204, the screw formed on the outer circumferential surface of the lock body 202 and the screw of the cap 204 are screwed together, so that the input cable 32 or the output cable 42 is fixed to the side wall of the housing body 172. The rubber sleeve 208 is disposed on the inside of the cap 204 and the lock body 202. The rubber sleeve 208 is a ring-shaped sealing member that covers a portion of the input cable 32 or the output cable 42 .

[0057] A metal substrate 220 is disposed on the bottom of the housing body 172. The substrate 220 is fixed to the bottom of the housing body 172 via a spacer 222. The substrate 220 is located below the cable lock portion 200 in the housing body 172.

[0058] The terminal block 100, the relay 104, the tripping unit 106, and the breaker 102 are disposed on the upper surface of the board 220. A plurality of power lines 128 are disposed above the board 220.

[0059] The terminal block 100 is disposed on a substrate 220 adjacent to three cable lock portions 200 that secure the three input cables 32. In the terminal block 100, the U-phase connection portion 130, the V-phase connection portion 132, the W-phase connection portion 134, and the N-phase connection portion 136 are integrally disposed in a line.

[0060] The breaker 102 is disposed on the board 220 adjacent to one cable lock unit 200 that secures the output cable 42. The relay 104 is disposed on the board 220 adjacent to the terminal block 100 and the breaker 102. The trip unit 106 is disposed on the board 220 adjacent to the breaker 102.

[0061] The U-phase connection portion 130, the V-phase connection portion 132, the W-phase connection portion 134, the N-phase connection portion 136, and the breaker 102 are fixed to the ends of the multiple power lines 128 using screws 224. The metal substrate 220 is an earth. Therefore, the ends of the power lines 128 for earthing are fixed to the substrate 220 using screws 226.

[0062] The multiple power lines 128 constituting the first to fourth electrical transmission paths 120 to 126 are desirably covered with an insulating coating of a specific color. Specifically, for the first electrical transmission path 120, the power line 128 transmitting U-phase single-phase AC power is covered with a red (first color) insulating coating. For the second electrical transmission path 122, the power line 128 transmitting V-phase single-phase AC power is covered with a white (second color) insulating coating. For the third electrical transmission path 124, the power line 128 transmitting W-phase single-phase AC power is covered with a black (third color) insulating coating.

[0063] In the current collecting box 10, the color of the insulating coating of the power lines 128 is set for each phase. Specifically, the power lines 128 transmitting U-phase single-phase AC power are covered with a red insulating coating. The power lines 128 transmitting V-phase single-phase AC power are covered with a white insulating coating. The power lines 128 transmitting W-phase single-phase AC power are covered with a black insulating coating. The earth power lines 128 are covered with a green insulating coating. This makes it possible to visually confirm which phase the multiple power lines 128 belong to.

[0064] FIG. 7 is a flowchart showing the operation (power output method) of the current collection box 10 (see FIG. 1) and the power output system 12 according to this embodiment.

[0065] First, in step S1, the user connects the connectors 26 of the three power feeders 14 to the connectors of the three vehicles 22. The user also connects the three connectors 34 of the current collecting box 10 to the three power feeders 14. Furthermore, the user connects the output terminal 108 (see FIGS. 3 and 4) of the current collecting box 10 to the load 28. After that, the user starts up the three power feeders 14. As a result, the power feeders 14 convert the DC power supplied from the battery of the vehicle 22 into AC power, thereby generating two-phase single-phase AC power. The generated two-phase single-phase AC power is output to the current collecting box 10.

[0066] Fig. 8 is a timing chart of two-phase single-phase AC voltages output from the first power feeder 16 to the third power feeder 20 (see Figs. 1 and 2). In Fig. 8, Vm is the amplitude of each single-phase AC voltage. T is the period of each single-phase AC voltage. In Fig. 8, for the two-phase single-phase AC voltages output from the first power feeder 16 to the third power feeder 20 (see Figs. 1 and 2), the waveform of one AC voltage is shown by a solid line, and the waveform of the other AC voltage is shown by a dashed line.

[0067] 8, the first power feeder 16 (see FIGS. 1 and 2) starts outputting a U-phase single-phase AC voltage at time t0. The first power feeder 16 also starts outputting a V-phase single-phase AC voltage with a phase difference of 120° with respect to the U-phase single-phase AC voltage.

[0068] In Fig. 8, the waveform of the V-phase single-phase AC voltage output by the first power feeder 16 (see Figs. 1 and 2) and the waveform of the V-phase single-phase AC voltage output by the second power feeder 18 are synchronized at time t1. That is, the waveforms of the two V-phase single-phase AC voltages are in phase. In this case, it is preferable that the second power feeder 18 outputs a V-phase single-phase AC voltage in synchronization with the V-phase single-phase AC voltage output from the first power feeder 16. In addition, the second power feeder 18 starts outputting a W-phase single-phase AC voltage with a phase difference of 120° with respect to the V-phase single-phase AC voltage.

[0069] In Fig. 8, the waveform of the W-phase single-phase AC voltage output by the second power feeder 18 (see Figs. 1 and 2) and the waveform of the W-phase single-phase AC voltage output by the third power feeder 20 are synchronized at time t2. That is, the waveforms of the two W-phase single-phase AC voltages are in phase. In this case, it is preferable that the third power feeder 20 outputs the W-phase single-phase AC voltage in synchronization with the W-phase single-phase AC voltage output from the second power feeder 18. In addition, the third power feeder 20 starts outputting the U-phase single-phase AC voltage with a phase difference of 120° with respect to the W-phase single-phase AC voltage.

[0070] In this manner, single-phase AC power (single-phase AC voltage) of U-phase to W-phase having a phase difference of 120° from each other is output from first to third power feeders 16 to 20 to power collection box 10.

[0071] In the current collecting box 10, the relay 104 (see FIGS. 3 and 5) is supplied with each of the single-phase AC powers of U-phase to W-phase via the terminal block 100. At the time of step S1, the breaker 102 is in an interrupted state. The relay 104 is started up by receiving the supply of the single-phase AC power of U-phase.

[0072] In step S2 of Fig. 7, the detection unit 154 of the relay 104 (see Figs. 3 and 5) starts detecting each single-phase AC power. The control unit 156 judges whether the quality of each single-phase AC power is normal based on the detection result of the detection unit 154. As shown in Fig. 8, when each single-phase AC voltage has a normal waveform, the control unit 156 (see Fig. 3) judges that the quality of each single-phase AC power is normal (step S2 of Fig. 7: YES). In other words, the control unit 156 judges that no abnormality has occurred in each single-phase AC power. Based on the positive judgment result in step S2, the relay 104 proceeds to step S3.

[0073] In step S3, the control unit 156 outputs a switching instruction signal to the switching unit 158 ​​to turn on the relay 104. The switching unit 158 ​​switches the relay 104 on based on the switching instruction signal from the control unit 156.

[0074] As a result, supply of U-phase single-phase AC power from the relay 104 to the tripping unit 106 starts in step S4.

[0075] In step S5, because the U-phase single-phase AC power supplied from relay 104 is equal to or greater than a predetermined value, tripping unit 106 supplies the U-phase single-phase AC power to breaker 102. Upon receiving the supply of U-phase single-phase AC power, interrupter 162 of breaker 102 allows the input side and output side of breaker 102 to be connected.

[0076] In step S6, the user operates the lever 160 (see FIGS. 3 and 5) of the breaker 102, and the input and output sides of the breaker 102 are switched from a disconnected state to a connected state (step S6: YES).

[0077] As a result, in step S7, breaker 102 supplies the U-phase to W-phase single-phase AC powers supplied to the input side as three-phase AC power to load 28 (see FIG. 1) via output terminal 108. That is, breaker 102 generates and outputs three-phase AC power including the U-phase to W-phase single-phase AC powers supplied thereto.

[0078] The detection unit 154 of the relay 104 sequentially detects each of the single-phase AC powers of the U phase to the W phase. Even when the breaker 102 supplies three-phase AC power to the load 28, the control unit 156 sequentially determines whether or not an abnormality has occurred in the quality of each of the single-phase AC powers of the U phase to the W phase based on the detection result of the detection unit 154 (step S8).

[0079] In step S8, if reverse phase, phase loss, or voltage imbalance occurs in each single-phase AC power, the control unit 156 determines that an abnormality (fault) has occurred in the quality of each single-phase AC power (step S8: YES).

[0080] Fig. 9 illustrates a case where a reverse phase occurs. In Fig. 9, at time t11, the single-phase AC voltage of the U phase is in phase with the single-phase AC voltage of the V phase. That is, a reverse phase occurs in the single-phase AC power of the U phase.

[0081] Fig. 10 illustrates a case where a phase loss occurs. In Fig. 10, after time point t12, the voltage value of the U-phase single-phase AC voltage becomes 0. That is, the U-phase single-phase AC power has a phase loss.

[0082] Fig. 11 illustrates a case where a voltage imbalance occurs. In Fig. 11, after time t13, the amplitude of the U-phase single-phase AC voltage falls below Vm. That is, the U-phase single-phase AC power is in a voltage imbalance.

[0083] When such an abnormality occurs in the quality of the single-phase AC power, the quality of the three-phase AC power decreases. Therefore, if the determination result in step S8 of Fig. 7 is positive (step S8: YES), in step S9, the control unit 156 (see Fig. 3) outputs a switching instruction signal to the switching unit 158 ​​to turn off the relay 104. The switching unit 158 ​​turns off the relay 104 based on the switching instruction signal from the control unit 156.

[0084] As a result, in step S10, the supply of U-phase single-phase AC power from the relay 104 to the tripping unit 106 is stopped. The tripping unit 106 stops the supply of U-phase single-phase AC power to the breaker 102 because the U-phase single-phase AC power supplied from the relay 104 has fallen below a predetermined level.

[0085] In step S11, since the supply of U-phase single-phase AC power from the tripping unit 106 has stopped, the breaker unit 162 switches the input side and output side of the breaker 102 from a connected state to a disconnected state. This stops (prohibits) the output of three-phase AC power from the breaker 102 to the load 28. This makes it possible to prevent the supply of degraded quality three-phase AC power to the load 28.

[0086] This embodiment has the following advantages.

[0087] 1 and 3, the current collecting box 10 generates three-phase AC power by combining U-phase to W-phase single-phase AC power input to the first connector 36 to the third connector 40, and outputs the generated three-phase AC power to the outside (load 28) from the output terminal 108. This makes it possible to output three-phase AC power to the outside with a simple configuration.

[0088] 3, when the quality of the U-phase to W-phase single-phase AC power is degraded, it is possible to prevent the degraded quality three-phase AC power from being output to the outside by blocking the first electricity transmission path 120 to the third electricity transmission path 124. As a result, it is possible to output only the three-phase AC power of normal quality to the outside.

[0089] In a case where the interrupter 162 allows the input side and output side of the breaker 102 to be connected, when the user operates the lever 160 to connect the input side and output side of the breaker 102, it becomes possible to output three-phase AC power to the outside from the output terminal 108. Furthermore, by interrupting the input side and output side of the breaker 102 to the interrupted state by the interrupter 162, the input side and output side of the breaker 102 are maintained in the interrupted state even if the user mistakenly operates the lever 160. As a result, it is possible to effectively prevent three-phase AC power of degraded quality from being output to the outside.

[0090] Providing the detection unit 154 in the current collecting box 10 makes it possible to easily detect whether the quality of the single-phase AC power of the U-phase to W-phase has decreased.

[0091] When the quality of the U-phase to W-phase single-phase AC power is normal, the input side and output side of the breaker 102 are maintained in a connected state by supplying power from the switching unit 158 ​​to the interrupting unit 162. This makes it possible to effectively output three-phase AC power of normal quality to the outside. Furthermore, when the quality of the U-phase to W-phase single-phase AC power is degraded, the supply of power from the switching unit 158 ​​to the interrupting unit 162 is stopped, thereby bringing the input side and output side of the breaker 102 into a cut-off state. This makes it possible to effectively prevent three-phase AC power of degraded quality from being output to the outside.

[0092] Since U-phase single-phase AC power is supplied to the breaker 162, the input side and output side of the breaker 102 can be easily brought into a connected state. Furthermore, when the first power feeder 16 to the third power feeder 20 (see FIG. 2) are operated so as to be started up in order starting from the first power feeder 16, power is immediately supplied to the breaker 162 when the first power feeder 16 is started up, so that the input side and output side of the breaker 102 can be quickly brought into a connected state.

[0093] When the power (U-phase single-phase AC power) flowing through the fourth electrical transmission path 126 is equal to or greater than a predetermined level, power is supplied to the interrupter 162 via the tripping unit 106, so that the input side and the output side of the breaker 102 can be connected. This allows three-phase AC power of normal quality to be output to the outside. Also, when the U-phase single-phase AC power flowing through the first electrical transmission path 120 drops and the power flowing through the fourth electrical transmission path 126 falls below a predetermined level, the tripping unit 106 switches the fourth electrical transmission path 126 to a cut-off state, and power supply to the cut-off unit 162 is cut off. As a result, the input side and the output side of the breaker 102 are cut off, so that it is possible to prevent three-phase AC power of reduced quality from being output to the outside.

[0094] As shown in FIGS. 1 and 3, a plurality of power lines 128 and a U-phase connection 130 can be used to effectively transmit U-phase single-phase AC power from the first connector 36 to the output terminal 108.

[0095] Using the multiple power lines 128 and the U-phase connecting portion 130 to the W-phase connecting portion 134, U-phase to W-phase single-phase AC power can be effectively transmitted from the first connector 36 to the third connector 40 to the output terminal 108. Also, the U-phase connecting portion 130 to the W-phase connecting portion 134 can be provided compactly.

[0096] It can be visually confirmed that the multiple red power lines 128 are the power lines of the first electrical transmission path 120.

[0097] It can be visually confirmed that the multiple red power lines 128 are power lines of the first electrical transmission path 120, the multiple white power lines 128 are power lines of the second electrical transmission path 122, and the multiple black power lines 128 are power lines of the third electrical transmission path 124.

[0098] As shown in FIG. 5, at least a portion of each of the first to third electrical transmission paths 120 to 124 can be protected by a housing 170. As shown in FIG.

[0099] By opening the housing body 172 and the cover 174, at least a portion of each of the first to third electrical transmission paths 120 to 124 can be inspected or repaired.

[0100] As shown in FIG. 6, the state (connection state) of each power line 128 can be visually confirmed through the transmission portion 176 without opening the cover 174 on the housing main body 172.

[0101] The locking section 177 can prevent people other than the user and manager (locker) of the current collecting box 10 from opening and closing the housing body 172 and the cover 174. As a result, the safety of the current collecting box 10 can be ensured even when the user and manager are away from the current collecting box 10. In addition, electric shock can be prevented.

[0102] By providing the sealing portion 175, it is possible to prevent rainwater and the like from entering the inside of the housing 170 from the outside of the housing 170 when the current collecting box 10 is used outdoors.

[0103] The sealing portion 175 has the rubber seal 186, so that when the current collecting box 10 is used outdoors, it is possible to effectively prevent rainwater and the like from entering the inside of the housing 170 from the outside of the housing 170.

[0104] By providing anti-slip portion 190 on the bottom surface of housing 170, housing 170 placed on an inclined surface or the like can be prevented from moving (slipping down).

[0105] Without opening the cover 174 on the housing main body 172, the states (connection states) of the first electrical transmission path 120 to the third electrical transmission path 124 and the on / off state between the input side and output side of the breaker 102 can be visually confirmed through the transparent portion 176.

[0106] As shown in FIG. 8, when the quality of the single-phase AC power of the first phase (U phase) to the third phase (W phase) deteriorates, it is possible to generate three-phase AC power using the single-phase AC power of the fourth phase (U phase) to the sixth phase (W phase).

[0107] Since the first to third phase single-phase AC powers have a phase difference of 120° with each other, and the fourth to sixth phase single-phase AC powers have a phase difference of 120° with each other, it is possible to effectively generate three-phase AC power using the first to third phase single-phase AC powers or the fourth to sixth phase single-phase AC powers.

[0108] When the first to third power feeders 16 to 20 (see FIG. 1) are operated so as to be started in order starting from the first power feeder 16, after the first power feeder 16 is started, the second power feeder 18 can output second-phase single-phase AC power so as to match the phase with the fourth-phase single-phase AC power output from the first power feeder 16. After the second power feeder 18 is started, the third power feeder 20 can output third-phase single-phase AC power so as to match the phase with the fifth-phase single-phase AC power output from the second power feeder 18. As a result, three-phase AC power of normal quality can be generated based on the single-phase AC powers having a phase difference of 120° from each other.

[0109] 3, the control unit 156 is communicatively connected to the detection unit 154, and sends a switching instruction signal based on the detection result of the detection unit 154 to the switching unit 158. This makes it possible to control the switching unit 158 ​​using the detection result of the detection unit 154.

[0110] As shown in Fig. 8, the U-phase to W-phase single-phase AC powers have a phase difference of 120° with each other. As shown in Fig. 3, the control unit 156 determines whether or not an abnormality has occurred in the quality of the U-phase to W-phase single-phase AC power, based on the U-phase to W-phase single-phase AC power detected by the detection unit 154. This makes it possible to effectively determine whether or not an abnormality has occurred in the quality of the U-phase to W-phase single-phase AC power.

[0111] Furthermore, the control unit 156 determines, as an abnormality in the quality of the U-phase to W-phase single-phase AC power, at least one of the following: a reverse phase has occurred in the U-phase to W-phase single-phase AC power (see FIG. 9), a phase loss has occurred in the U-phase to W-phase single-phase AC power (see FIG. 10), or a voltage imbalance has occurred in the U-phase to W-phase single-phase AC power (see FIG. 11). This makes it possible to effectively determine the presence or absence of a reverse phase, a phase loss, or a voltage imbalance in the U-phase to W-phase single-phase AC power.

[0112] The control unit 156 is connected to the switching unit 158 ​​so as to be able to communicate with it. When the control unit 156 changes from a state in which the U-phase to W-phase single-phase AC power is not input from the first power feeder 16 to the third power feeder 20 to a state in which the U-phase to W-phase single-phase AC power is input, to the switching unit 158, when the control unit 156 changes from a state in which the occurrence of an abnormality is determined to a state in which the occurrence of an abnormality is not determined to be occurring, or when the control unit 156 changes to a state in which the occurrence of an abnormality is determined to be not occurring, the control unit 156 communicates with the switching unit 158 ​​so as to supply power to the interrupter 162. As a result, when the quality of the U-phase to W-phase single-phase AC power becomes normal, it becomes possible to supply power from the switching unit 158 ​​to the interrupter 162, and quickly switch the input side and output side of the breaker 102 to a connected state.

[0113] As shown in Fig. 8, the U-phase single-phase AC power input from first power feeder 16 (see Fig. 1) to output terminal 108 (see Fig. 3) is input earlier than the V-phase single-phase AC power input from second power feeder 18 to output terminal 108. This allows first power feeder 16 to third power feeder 20 to be started in the order of first power feeder 16 and second power feeder 18, and to output U-phase and V-phase single-phase AC power in that order.

[0114] The V-phase single-phase AC power input from the second power feeder 18 to the output terminal 108 is input earlier than the W-phase single-phase AC power input from the third power feeder 20 to the output terminal 108. This allows the first power feeder 16, the second power feeder 18, and the third power feeder 20 to start up in this order, and the U-phase, V-phase, and W-phase single-phase AC powers to be output in this order.

[0115] The effects of this embodiment will be further described.

[0116] In the current collecting box 10, the cable 30, the terminal block 100, the breaker 102, etc. are packaged. This simplifies the electrical connection with the three power feeders 14. Also, the terminal block 100, the breaker 102, etc. are housed in a housing 170, and a VCT is used as the cable 30. This ensures the electrical safety of the current collecting box 10, and the waterproofness and durability of the current collecting box 10 when used outdoors.

[0117] The cable lock section 200 is waterproof and is located above and away from the installation surface (the bottom surface of the non-slip section 190) of the current collecting box 10. This makes it possible to effectively prevent water and the like from entering the inside of the housing 170 when the current collecting box 10 is used outdoors.

[0118] Since the cable 30 is a VCT, it is possible to ensure the abrasion resistance, durability, and water resistance of the cable 30. In addition, by setting the overall length of the cable 30 to be long, it is possible to connect the connector 34 to the power feeder 14 and the connector 26 to the vehicle 22 while ensuring the stopping interval of the vehicle 22.

[0119] Next, a modification of this embodiment will be described.

[0120] In this embodiment, the power supply device 14 may be any device that can supply power to the outside. Therefore, this embodiment can be applied to various power devices such as a portable inverter, a portable power supply device, a battery power source, an electric vehicle, and a charger as the power supply device 14.

[0121] In the present embodiment, the power supply device 14 may be built into the vehicle 22. In this case, the power supply device 14 may be detachably mounted on the vehicle 22. In this case, the power supply device 14 may be detachably mounted on the vehicle 22 without using tools or the like.

[0122] In this embodiment, the color of the insulating coating of the first electrical transmission path 120 or the U-phase power line 128 is uniformly red. The color of the insulating coating of the second electrical transmission path 122 or the V-phase power line 128 is uniformly white. The color of the insulating coating of the third electrical transmission path 124 or the W-phase power line 128 is uniformly black. In this embodiment, the color of the insulating coating may be uniformly another color.

[0123] In this embodiment, the U-phase connecting portion 130, the V-phase connecting portion 132, the W-phase connecting portion 134, and the N-phase connecting portion 136 are arranged in a row and integrally configured. In this embodiment, the U-phase connecting portion 130, the V-phase connecting portion 132, the W-phase connecting portion 134, and the N-phase connecting portion 136 may be disposed inside the housing 170 with intervals between them.

[0124] In this embodiment, the current collecting box 10 may output three-phase AC power to various power devices instead of the load 28.

[0125] In addition to the above disclosure, the following notes are also disclosed.

[0126] (Appendix 1) The power line connection device includes a first input terminal (36) to which a first power feeder (16) that outputs single-phase AC power of a first phase is electrically connected, a second input terminal (38) to which a second power feeder (18) that outputs single-phase AC power of a second phase is electrically connected, a third input terminal (40) to which a third power feeder (20) that outputs single-phase AC power of a third phase is electrically connected, and an output terminal (108) that outputs three-phase AC power including the single-phase AC power of the first phase to the third phase input from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively, and to which an external load (28) or a power device is electrically connected.

[0127] As a result, three-phase AC power is generated by combining three single-phase AC powers input to the first input terminal to the third input terminal, and the generated three-phase AC power is output from the output terminal to the outside (load or power device). This makes it possible to output three-phase AC power to the outside with a simple configuration.

[0128] (Appendix 2) In the power line connection device described in Supplementary Note 1, the power line connection device may further include a first electrical transmission path (120) electrically connecting the first input terminal and the output terminal, a second electrical transmission path (122) electrically connecting the second input terminal and the output terminal, a third electrical transmission path (124) electrically connecting the third input terminal and the output terminal, and an interrupting unit (102) disposed on the first electrical transmission path to the third electrical transmission path and interrupting the first electrical transmission path to the third electrical transmission path.

[0129] In this way, when the quality of the single-phase AC power is degraded, the electrical transmission path is cut off, thereby preventing the degraded quality three-phase AC power from being output to the outside, and as a result, only the normal quality three-phase AC power can be output to the outside.

[0130] (Appendix 3) In the power line connection device described in Appendix 2, the disconnecting unit may have an operator (160) that is operated by a user to change the disconnecting unit from a disconnected state to a connected state, and a disconnecting unit (162) that allows the connected state when power is being supplied and sets the disconnected state when power is not being supplied.

[0131] As a result, when the interrupting unit allows the connection state, when the user operates the control to bring the interrupting unit into the connection state, it becomes possible to output three-phase AC power from the output terminal to the outside. Also, by the interrupting unit bringing the interrupting unit into the interrupted state, even if the user mistakenly operates the control, the interrupting unit is maintained in the interrupted state. As a result, it is possible to effectively prevent three-phase AC power of reduced quality from being output to the outside.

[0132] (Appendix 4) In the power line connection device described in Supplementary Note 3, the power line connection device may further include a detection unit (154) that detects the single-phase AC power of the first phase to the third phase input from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively.

[0133] This makes it possible to easily detect whether the quality of the three single-phase AC power sources has deteriorated.

[0134] (Appendix 5) In the power line connection device described in Supplementary Note 4, the power line connection device may further include a switching unit (158) that switches between supplying the power to the cutoff unit and not supplying the power, based on the single-phase AC power of the first phase to the third phase detected by the detection unit.

[0135] As a result, when the quality of the single-phase AC power is normal, the switching unit supplies power to the breaker unit to maintain the interrupter unit in a connected state. As a result, three-phase AC power of normal quality can be effectively output to the outside. Also, when the quality of the single-phase AC power has deteriorated, the switching unit stops supplying power to the breaker unit to bring the interrupter unit into a cut-off state. As a result, it is possible to effectively prevent three-phase AC power of deteriorated quality from being output to the outside.

[0136] (Appendix 6) In the power line connection device described in Supplementary Note 5, the interrupter may be electrically connected to the first electrical transmission path, and the power may be supplied from the first electrical transmission path.

[0137] As a result, power based on the first-phase single-phase AC power is supplied to the breaker, so that the interrupter can be easily switched to a connected state. Also, when the first to third power feeders are operated so as to be started up in order starting from the first power feeder, power is immediately supplied to the breaker when the first power feeder is started up, so that the interrupter can be quickly switched to a connected state.

[0138] (Appendix 7) In the power line connection device described in Appendix 6, the power line connection device may further include a fourth electrical transmission path (126) that electrically connects the first electrical transmission path and the interrupting unit, and another interrupting unit (106) that is arranged on the fourth electrical transmission path and that brings the fourth electrical transmission path into an interrupted state when the power flowing through the fourth electrical transmission path is less than a predetermined value.

[0139] As a result, when the power flowing through the fourth electrical transmission path is equal to or greater than a predetermined level, power is supplied to the interrupting unit, and the interrupting unit can be brought into a connected state. As a result, three-phase AC power of normal quality can be output to the outside. Furthermore, when the first-phase single-phase AC power flowing through the first electrical transmission path decreases and the power flowing through the fourth electrical transmission path becomes less than a predetermined level, the fourth electrical transmission path is switched to an interrupted state, and power supply to the interrupting unit is cut off. As a result, the interrupting unit is brought into an interrupted state, and it is possible to prevent three-phase AC power of reduced quality from being output to the outside.

[0140] (Appendix 8) In the power line connection device described in Supplementary Note 7, the power line connection device may further include a control unit (156) communicatively connected to the detection unit and configured to send a switching instruction signal based on a detection result of the detection unit to the switching unit.

[0141] This makes it possible to control the switching unit using the detection result of the detection unit.

[0142] (Appendix 9) In the power line connection device described in Supplementary Note 8, the single-phase AC powers of the first phase to the third phase may be set to have a phase difference of 120° with each other, and the control unit may determine, based on the single-phase AC powers of the first phase to the third phase detected by the detection unit, whether or not an abnormality has occurred in quality of the single-phase AC powers of the first phase to the third phase.

[0143] This makes it possible to effectively determine whether or not there is an abnormality in the quality of each of the first to third phases of single-phase AC power.

[0144] (Appendix 10) In the power line connection device described in Supplementary Note 9, the control unit may determine, as the abnormality in quality of the single-phase AC power of the first phase to the third phase, at least any one of an occurrence of reverse phase in the single-phase AC power of the first phase to the third phase, an occurrence of a missing phase in the single-phase AC power of the first phase to the third phase, or an occurrence of a voltage imbalance in the single-phase AC power of the first phase to the third phase.

[0145] This makes it possible to effectively determine whether or not there is a reverse phase, a missing phase, or a voltage imbalance for each of the first to third phases of single-phase AC power.

[0146] (Appendix 11) In the power line connection device described in Supplementary Note 9 or 10, the control unit may be communicatively connected to the switching unit, and when transitioning from a state in which the single-phase AC power of the first phase to the third phase is not being input from the first power feeder to the third power feeder to a state in which the single-phase AC power is being input, when the state in which it has been determined that an abnormality has occurred changes to a state in which it has not been determined that an abnormality has occurred, or when the state in which it has been determined that no abnormality has occurred changes, the control unit may communicate with the switching unit so that the power to the cut-off unit is brought into the supply state.

[0147] As a result, when the quality of each of the first to third phase single-phase AC powers becomes normal, power can be supplied from the switching unit to the cut-off unit, making it possible to quickly switch the on / off unit to the connected state.

[0148] (Appendix 12) In the power line connection device described in any one of Supplementary Notes 1 to 11, the first power supply device may output single-phase AC power of a fourth phase, and the single-phase AC power of the fourth phase may be further input to the first input terminal, the second power supply device may output single-phase AC power of a fifth phase, and the single-phase AC power of the fifth phase may be further input to the second input terminal, and the third power supply device may output single-phase AC power of a sixth phase, and the single-phase AC power of the sixth phase may be further input to the third input terminal.

[0149] As a result, when the quality of the first to third phase single-phase AC power deteriorates, it becomes possible to generate three-phase AC power using the fourth to sixth phase single-phase AC power.

[0150] (Appendix 13) In the power line connection device described in Supplementary Note 12, the first power feeder may output the single-phase AC power of the first phase and the single-phase AC power of the fourth phase with a phase difference of 120°.

[0151] This effectively allows three-phase AC power to be generated using a fourth single-phase AC power.

[0152] (Appendix 14) In the power line connection device described in Supplementary Note 13, the second power feeder may output the single-phase AC power of the second phase having the same phase as the single-phase AC power of the fourth phase output by the first power feeder.

[0153] As a result, when the first to third power feeders are operated so that they start up in the order of the first power feeder and then the second power feeder, after the first power feeder is started up, the second power feeder can output second-phase single-phase AC power so as to match the phase with the fourth-phase single-phase AC power output from the first power feeder.

[0154] (Appendix 15) In the power line connection device described in Supplementary Note 14, the second power feeder may output the single-phase AC power of the second phase and the single-phase AC power of the fifth phase with a phase difference of 120°, and the third power feeder may output the single-phase AC power of the third phase with the same phase as the single-phase AC power of the fifth phase output by the second power feeder.

[0155] As a result, when the first to third power feeders are operated so that they start up in the order of the first power feeder, the second power feeder, and the third power feeder, after the second power feeder is started, the third power feeder can output third-phase single-phase AC power so as to match the phase with the fifth-phase single-phase AC power output from the second power feeder.

[0156] (Appendix 16) In the power line connection device according to any one of Supplementary Notes 13 to 15, the third power feeder may output the single-phase AC power of the third phase and the single-phase AC power of the sixth phase with a phase difference of 120°.

[0157] This makes it possible to effectively generate three-phase AC power using first to third phase single-phase AC power or fourth to sixth phase single-phase AC power.

[0158] (Appendix 17) In the power line connection device described in any one of Supplementary Notes 1 to 16, the single-phase AC power of the first phase input from the first power feeder to the first input terminal may be configured to be input earlier than the single-phase AC power of the second phase input from the second power feeder to the second input terminal.

[0159] This enables the first to third power feeders to be started up in the order of the first power feeder and the second power feeder, and to output first-phase and second-phase single-phase AC power in that order.

[0160] (Appendix 18) In the power line connection device described in Supplementary Note 17, the single-phase AC power of the second phase input from the second power feeder to the second input terminal may be configured to be input earlier than the single-phase AC power of the third phase input from the third power feeder to the third input terminal.

[0161] This enables the first to third power feeders to be started in the order of the first power feeder, the second power feeder, and the third power feeder, and to output first-phase, second-phase, and third-phase single-phase AC power in that order.

[0162] (Appendix 19) The power output system (12) includes a first power feeder that outputs single-phase AC power of a first phase, a second power feeder that outputs single-phase AC power of a second phase, a third power feeder that outputs single-phase AC power of a third phase, and a power line connection device having a first input terminal to which the first power feeder is electrically connected, a second input terminal to which the second power feeder is electrically connected, a third input terminal to which the third power feeder is electrically connected, and an output terminal to which an external load or power device is electrically connected.

[0163] Thereby, three-phase AC power is generated by combining three single-phase AC powers input to the first input terminal to the third input terminal, and the generated three-phase AC power is output to the outside (load) from the output terminal. As a result, it is possible to output three-phase AC power to the outside with a simple configuration.

[0164] (Appendix 20) The power output method includes the steps of: outputting a first-phase single-phase AC power from a first power feeder (S1); outputting a second-phase single-phase AC power from a second power feeder (S1); outputting a third-phase single-phase AC power from a third power feeder (S1); and inputting the first-phase to third-phase single-phase AC powers output from the first power feeder to the third power feeder, respectively, into an output device and outputting three-phase AC power including the first-phase to third-phase single-phase AC powers from the output device (S7).

[0165] Thereby, three-phase AC power is generated by combining three single-phase AC powers input to the first input terminal to the third input terminal, and the generated three-phase AC power is output to the outside (load) from the output terminal. As a result, it is possible to output three-phase AC power to the outside with a simple configuration.

[0166] (Appendix 21) A program for causing a computer (150) to execute the power output method described in Supplementary Note 20.

[0167] (Appendix 22) A storage medium (152) that stores the program described in Appendix 21.

[0168] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0169] 10...Current collection box (power line connection device) 12...Power output system 16...1st power feeder 18…Second power feeder 20…Third power feeder 36…First connector (first input terminal) 38...Second connector (second input terminal) 40...Third connector (third input terminal) 108...Output terminal 150...Microcomputer (computer) 152...Memory (storage medium)

Claims

1. a first input terminal to which a first power supply device that outputs a first phase single-phase AC power is electrically connected; a second input terminal to which a second power supply device that outputs a second phase of single-phase AC power is electrically connected; a third input terminal to which a third power supply device that outputs a third phase of single-phase AC power is electrically connected; an output terminal that outputs three-phase AC power including the single-phase AC power of the first phase to the third phase input from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively, and to which an external load or power device is electrically connected; A power line connection device comprising:

2. 2. The power line connection device according to claim 1, a first electrical transmission path electrically connecting the first input terminal and the output terminal; a second electrical transmission path electrically connecting the second input terminal and the output terminal; a third electrical transmission path electrically connecting the third input terminal and the output terminal; an interrupting portion disposed on the first electrical transmission path to the third electrical transmission path and interrupting the first electrical transmission path to the third electrical transmission path; The power line connection device further comprises:

3. 3. The power line connection device according to claim 2, The interrupted portion is an operator that is operated by a user to change the connecting / disconnecting unit from a disconnected state to a connected state; a cutoff unit that allows the connection state to be established when power is being supplied and sets the cutoff state to be established when power is not being supplied; A power line connection device comprising:

4. 4. The power line connection device according to claim 3, The power line connection device further includes a detection unit that detects the single-phase AC power of the first phase to the third phase input from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively.

5. 5. The power line connection device according to claim 4, the power line connection device further comprising a switching unit that switches between supplying the power to the cutoff unit and not supplying the power, based on the single-phase AC power of the first phase to the third phase detected by the detection unit.

6. In the power line connection device according to any one of claims 3 to 5, The interrupter is electrically connected to the first electrical transmission path, and receives the power from the first electrical transmission path.

7. 7. The power line connection device according to claim 6, a fourth electrical transmission path electrically connecting the first electrical transmission path and the interrupter; another interrupter that is disposed on the fourth electrical transmission path and that interrupts the fourth electrical transmission path when the power flowing through the fourth electrical transmission path is less than a predetermined value; The power line connection device further comprises:

8. 8. The power line connection device according to claim 7, The power line connection device further includes a control unit communicatively connected to the detection unit and configured to send a switching instruction signal to the switching unit based on a detection result of the detection unit.

9. 9. The power line connection device according to claim 8, The single-phase AC powers of the first phase to the third phase are provided to have a phase difference of 120° with each other, The control unit determines whether or not an abnormality has occurred in quality of the single-phase AC power of the first phase to the third phase based on the single-phase AC power of the first phase to the third phase detected by the detection unit.

10. 10. The power line connection device according to claim 9, The control unit determines, as an abnormality in the quality of the single-phase AC power of the first phase to the third phase, at least any one of the following abnormalities: a reverse phase has occurred in the single-phase AC power of the first phase to the third phase, a phase loss has occurred in the single-phase AC power of the first phase to the third phase, or a voltage imbalance has occurred in the single-phase AC power of the first phase to the third phase.

11. 11. The power line connection device according to claim 9, The control unit is A switch unit is communicatively connected to the switch unit, When the single-phase AC power of the first phase to the third phase is being input from the first power supply device to the third power supply device, the single-phase AC power of the first phase to the third phase is being input from the first power supply device to the third power supply device. when the state in which it has been determined that the abnormality has occurred changes to a state in which it has not been determined that the abnormality has occurred, or when the state in which it has been determined that the abnormality has not occurred changes, the power line connection device communicates with the switching unit so that the power to the cut-off unit is returned to the supply state.

12. The power line connection device according to any one of claims 1 to 11, The first power supply outputs a fourth phase of single-phase AC power, The single-phase AC power of the fourth phase is further input to the first input terminal, The second power supply outputs a five-phase single-phase AC power, The second input terminal is further supplied with the single-phase AC power of the fifth phase, The third power supply outputs a sixth phase of single-phase AC power, the sixth phase of the single-phase AC power is further input to the third input terminal.

13. 13. The power line connection device according to claim 12, The first power supply device outputs the single-phase AC power of the first phase and the single-phase AC power of the fourth phase with a phase difference of 120°.

14. 14. The power line connection device according to claim 13, The second power supply device outputs the single-phase AC power of the second phase having the same phase as the single-phase AC power of the fourth phase output by the first power supply device.

15. 15. The power line connection device according to claim 14, The second power supply outputs the single-phase AC power of the second phase and the single-phase AC power of the fifth phase with a phase difference of 120°; The third power supply device outputs the single-phase AC power of the third phase having the same phase as the single-phase AC power of the fifth phase output by the second power supply device.

16. In the power line connection device according to any one of claims 13 to 15, The third power supply device outputs the single-phase AC power of the third phase and the single-phase AC power of the sixth phase with a phase difference of 120°.

17. The power line connection device according to any one of claims 1 to 16, a power line connection device configured so that the single-phase AC power of the first phase input from the first power supply to the first input terminal is input earlier than the single-phase AC power of the second phase input from the second power supply to the second input terminal.

18. 18. The power line connection device according to claim 17, a power line connection device configured so that the single-phase AC power of the second phase input from the second power supply to the second input terminal is input earlier than the single-phase AC power of the third phase input from the third power supply to the third input terminal.

19. A first power supply device that outputs a first phase of single-phase AC power; A second power supply device that outputs a second phase of single-phase AC power; a third power supply device that outputs a third phase of single-phase AC power; a power line connection device having a first input terminal to which the first power feeder is electrically connected, a second input terminal to which the second power feeder is electrically connected, a third input terminal to which the third power feeder is electrically connected, and an output terminal to which an external load or power device is electrically connected, the power line connection device outputting three-phase AC power including the single-phase AC power of the first phase to the third phase inputted from the first power feeder to the third power feeder connected to the first input terminal to the third input terminal, respectively; A power output system comprising:

20. outputting a first phase of single-phase AC power from a first power supply; outputting single-phase AC power of a second phase from a second power supply; outputting a third phase of single-phase AC power from a third power supply; inputting the single-phase AC power of the first phase to the third phase output from the first power feeder to the third power feeder, respectively, into an output device, and outputting three-phase AC power including the single-phase AC power of the first phase to the third phase from the output device; The power output method comprises:

21. A program for causing a computer to execute the power output method according to claim 20.

22. A storage medium for storing the program according to claim 21.

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