Power Supply System

Abstract

To provide a power supply system that can supply power from a generator to an electrical load using in-house wiring in the event of a power outage with a simple operation.SOLUTION: A power supply system 10 supplies power from a power generation device 12 to an electric load 13 when a commercial power supply 11 fails. Further, in the power supply system 10, when a power failure does not occur, the commercial power supply 11 is supplied to the electric load 13 through an output unit 16 via in-house wiring 15 laid in an interior 14. Further, the output unit 16 includes a first output unit 16 and a second output unit 16. Further, in the power supply system 10, when a power failure occurs, the power generation device 12 is connected to the first output unit 16, and power is supplied to the electric load 13 via the in-house wiring 15 and the second output unit 16.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a power supply system, and more particularly to a power supply system capable of supplying power from a generator to an electrical load by utilizing in-house wiring during a power outage. [Background technology]

[0002] If the supply of electricity from commercial power sources to indoor locations is cut off due to a disaster or other reason, electrical loads installed indoors, such as air conditioners and lighting, will stop working.

[0003] In view of such circumstances, a power supply device has been developed that supplies power indoors when the commercial power source is interrupted. This power supply device is, for example, a generator, a battery, or a vehicle equipped with a power generating function that is placed outdoors, and when the commercial power source is interrupted, it supplies power to the wiring inside the house instead of the commercial power source. Such a power supply device is described, for example, in Patent Document 1 below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-123749 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the above-mentioned power supply device has room for improvement in terms of user convenience and the like.

[0006] Specifically, the power supply device according to the background art is often installed outdoors. In such a case, when a power outage occurs in the commercial power supply, the user must go outdoors once, start up the power supply device, and switch the power system from the commercial power supply to the power supply device. In addition, when the commercial power supply is restored, the user must perform the reverse operation. Such operations are troublesome for the user.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a power supply system that can supply power from a generator to an electrical load by using in-house wiring with simple operations during a power outage. [Means for solving the problem]

[0008] The power supply system of the present invention is a power supply system that supplies power to a power generator when a commercial power supply fails. (Excluding those connected via a transformer) The power supply system supplies power from one of the power generation devices to an electrical load via an output unit, and includes an arithmetic control unit, a first switching unit, a second switching unit, and a third switching unit. When no power outage occurs, the arithmetic control unit supplies power from the output unit to the electrical load via the first switching unit and the second switching unit, and when a power outage occurs, the arithmetic control unit supplies power supplied from the power generation device via one of the output units to the electrical load via the second switching unit, the third switching unit, and the other output unit. Effect of the Invention

[0009] According to the present invention, power can be supplied from a generator to an electrical load by utilizing in-house wiring during a power outage with simple operations. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a power supply system according to an embodiment of the present invention; [Diagram 2] This is a diagram showing a power supply system according to an embodiment of the present invention, showing the circuit configuration of a power outage distribution board, etc., and is a circuit diagram showing the operation of the power outage distribution board when there is a power outage and the power generation equipment is stopped. [Diagram 3] FIG. 1 is a diagram showing a power supply system according to an embodiment of the present invention, and is a circuit diagram showing the operation of a power failure distribution board when a power failure occurs and a power generation device is generating power. [Figure 4]FIG. 1 is a diagram showing a power supply system according to an embodiment of the present invention, and is a circuit diagram showing the operation of a power failure distribution board when power is restored and the power generation device is generating power. [Diagram 5] FIG. 2 is a diagram showing a power supply system according to an embodiment of the present invention, and is a circuit diagram showing the operation of a power failure distribution board when power is restored and the power generation device is stopped. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same components are basically designated by the same reference numerals, and repeated description will be omitted.

[0012] FIG. 1 is a schematic diagram showing a power supply system 10. As shown in FIG.

[0013] The power supply system 10 supplies power from a power generation device 12 to an electrical load 13 when a commercial power source 11 experiences a power outage. Here, the power supply system 10 is shown applied to an interior 14 of a house 30. The electrical load 13 is a load connected to an indoor outlet or a load connected to a waterproof outlet placed outdoors. The electrical load 13 may be placed indoors or outdoors.

[0014] In the power supply system 10, when no power outage occurs, the commercial power source 11 is supplied to the electrical load 13 via the power line 29, the distribution board 31, the indoor wiring 15, the power outage distribution board 19, and the output unit 16 which is an outlet.

[0015] On the other hand, when a power outage occurs, based on instructions from the calculation control unit 32 described later, the power supply system 10 supplies the electricity generated by the power generation device 12 to the electrical load 13 via the output unit 16, the indoor wiring 15, the power outage distribution board 19, the indoor wiring 15 and the output unit 16.

[0016] The electrical load 13 may be an electrical appliance used inside the house 30, such as lighting, an air conditioner, a cooking appliance, or the like.

[0017] The configuration and operation of the power supply system 10 will be specifically described with reference to FIGS.

[0018] The power supply system 10 and the power failure distribution board 19 can take the following four states: a first state in which the commercial power source 11 is out of power and the power generation device 12 is stopped, a second state in which the commercial power source 11 is out of power and power is supplied from the power generation device 12 to the output unit 16, a third state in which the commercial power source 11 is restored and the power generation device 12 is generating power, and a fourth state in which the commercial power source 11 is restored and the power generation device 12 is stopped.

[0019] The first state is shown in Figure 2, the second state is shown in Figure 3, the third state is shown in Figure 4, and the fourth state is shown in Figure 5. In Figures 2 to 5, the current flow is indicated by dashed lines.

[0020] Fig. 2 shows a circuit configuration of the power failure distribution board 19 and the like. Furthermore, a first state in which a power failure occurs and the power generation device 12 is stopped will be described with reference to Fig. 2. In the following description, in the flow of current from the commercial power source 11 to the electrical load 131 and the like, the side closer to the commercial power source 11 may be referred to as the upstream side, and the side away from the commercial power source 11 may be referred to as the downstream side.

[0021] First, there will be described a circuit configuration of the power supply system 10. The power supply system 10 includes a distribution board 31, a power failure distribution board 19, a power generation device 12, and wiring and the like that connects these devices.

[0022] The commercial power source 11 is AC power supplied from outdoors, and its voltage V1 is, for example, 100V.

[0023] The distribution board 31 is a device for distributing the power supplied from the commercial power source 11, and includes a main breaker 33, a breaker 341, a breaker 342, and a breaker 343. The distribution board 31 is generally installed indoors.

[0024] The main breaker 33 is disposed upstream of the connection line inside the distribution board 31. When the main breaker 33 is in a connected state, the commercial power source 11 can be supplied to the entire power supply system 10, and when the main breaker 33 is in an interrupted state, the supply of the commercial power source 11 to the entire power supply system 10 is stopped.

[0025] The connection line downstream of main breaker 33 branches into three, and breaker 341, breaker 342, and breaker 343 are installed in each connection line. When breaker 341, breaker 342, and breaker 343 are in a connected state, current flows in the downstream side of the connection line in which they are installed. When breaker 341, breaker 342, and breaker 343 are in a cut-off state, current does not flow in the downstream side of the connection line in which they are installed. Here, three breakers 341, breaker 342, and breaker 343 are illustrated, but in reality, many more are provided.

[0026] The power failure distribution board 19 has a first switching unit 20, a second switching unit 21, a third switching unit 22, and an arithmetic control unit 32. As described later, by providing the power failure distribution board 19 in the power supply system 10, during a power failure, it becomes possible to supply power from the output unit 163 to the output unit 161 and the output unit 162. Here, as the first switching unit 201 etc. described later, a relay that performs switching mechanically, or a semiconductor element such as a transistor that performs switching electrically can be adopted.

[0027] The first switching unit 20 has a first switching section 201, a first switching section 202, and a first switching section 203. As described later, the first switching unit 20 is turned off during a power outage to prevent the current generated by the power generation device 12 from flowing into the distribution board 31.

[0028] The first switching unit 201 has a first terminal 231 and a second terminal 241. The first terminal 231 is connected to a breaker 341. The second terminal 241 is connected via a connection line 38 to a third terminal 251 of the second switching unit 211, which will be described later.

[0029] The first switching unit 202 has a first terminal 232 and a second terminal 242. The second terminal 242 is connected to a breaker 342. The second terminal 242 is connected via a connection line 39 to a third terminal 252 of the second switching unit 212, which will be described later.

[0030] The first switching unit 203 has a first terminal 233 and a second terminal 243. The second terminal 243 is connected to a breaker 343. The second terminal 243 is connected via a connection line 40 to a third terminal 253 of the second switching unit 213, which will be described later.

[0031] The second switching unit 21 has a second switching section 211, a second switching section 212, and a second switching section 213. As described later, the second switching unit 21 is in a cut-off state when there is a power outage and the power generation device 12 is not generating power.

[0032] The second switching unit 211 has a third terminal 251 and a fourth terminal 261. The third terminal 251 is connected to the second terminal 241 of the first switching unit 201 via a connection line 38. The fourth terminal 261 is connected to the output unit 161.

[0033] The second switching unit 212 has a third terminal 252 and a fourth terminal 262. The third terminal 252 is connected to the second terminal 242 of the first switching unit 202 via a connection line 39. The fourth terminal 262 is connected to the output unit 162.

[0034] The second switching unit 213 has a third terminal 253 and a fourth terminal 263. The third terminal 253 is connected to the second terminal 243 of the first switching unit 203 via the connection line 40. The fourth terminal 263 is connected to the output unit 163. Here, for example, the output unit 161 and the output unit 162 are the first output unit, and the output unit 163 is the second output unit.

[0035] The third switching unit 22 has a third switching section 221, a third switching section 222, and a third switching section 223. The third switching unit 22 is in a connected state when power is supplied from the power generation device 12 to the electric load 131 and the electric load 132. The third switching unit 22 is in a cut-off state when power is supplied from the commercial power source 11. Here, for example, the electric load 131 is a first load, and the electric load 132 is a second load.

[0036] The third switching unit 221 has a fifth terminal 271 and a sixth terminal 281. The fifth terminal 271 is connected to the connection line 38 via the connection line 41. The sixth terminal 281 is connected to a sixth terminal 282 of the third switching unit 222 and a sixth terminal 283 of the third switching unit 223 via the connection line 37.

[0037] The third switching unit 222 has a fifth terminal 272 and a sixth terminal 282. The fifth terminal 272 is connected to the connection line 39 via the connection line 42. The sixth terminal 282 is connected to the sixth terminal 281 of the third switching unit 221 and the sixth terminal 283 of the third switching unit 223 via the connection line 37.

[0038] The third switching unit 223 has a fifth terminal 273 and a sixth terminal 283. The fifth terminal 273 is connected to the connection line 40 via the connection line 43. The sixth terminal 283 is connected to the sixth terminal 281 of the third switching unit 221 and the sixth terminal 282 of the third switching unit 222 via the connection line 37.

[0039] The output unit 161 is connected to a fourth terminal 261 of the third switching unit 221. The output unit 162 is connected to a fourth terminal 262 of the second switching unit 212. The output unit 163 is connected to a fourth terminal 263 of the second switching unit 213. In the following description, the output unit 161, the output unit 162, and the output unit 163 may be collectively referred to as the output unit 16.

[0040] Here, the electrical load 131 is connected to an output section 161. The electrical load 132 is connected to an output section 162, and the power generation device 12 is connected to an output section 163. In the following description, the electrical load 131 and the electrical load 132 may be collectively referred to as the electrical load 13.

[0041] The arithmetic control unit 32 is a calculation element consisting of, for example, a CPU, and controls the operation of each part constituting the power failure distribution board 19. The arithmetic control unit 32 also constantly monitors the voltage V1 of the commercial power source 11 and the voltage V2 of the connection lines 41, 42, and 43. The arithmetic control unit 32 controls the disconnection or connection state of the first switching unit 20, the second switching unit 21, and the connection state of the second switching unit 22, and controls the operation of the power generation device 12, based on the monitored voltages V1 and V2.

[0042] The above is an explanation of the circuit configuration of the power outage distribution board 19.

[0043] In the first state, the commercial power source 11 is experiencing a power outage and the power generation device 12 is stopped, so that no power is supplied from the commercial power source 11 to the electric loads 131 and 132. In addition, since the power generation device 12 is in a stopped state, no power is supplied from the power generation device 12 to the electric loads 131 and 132.

[0044] Therefore, based on the instruction from the arithmetic and control unit 32, the first switching unit 20, the second switching unit 21 and the third switching unit 22 are all in the cut-off state.

[0045] 3 is a circuit diagram showing the operation of power failure distribution board 19 in a second state in which commercial power source 11 is experiencing a power failure and power generation device 12 is generating electricity. When power supply from commercial power source 11 to power supply system 10 is interrupted due to the influence of a disaster or the like, calculation control unit 32 sets power supply system 10 to the second state. The calculation control unit 32 sets power failure distribution board 19 to the second state based on the fact that voltage V1 has become zero or extremely low.

[0046] In the second state, the calculation control unit 32 sets the first switching unit 20 to a cut-off state, the second switching unit 21 to a conductive state, and the third switching unit 22 to a conductive state. Furthermore, the calculation control unit 32 starts up the power generation device 12 to start power generation based on the fact that the voltage V1 has become zero or extremely low.

[0047] Here, the power generation device 12 may be constantly connected to the output unit 163, or when the commercial power source 11 experiences a power outage, the user may connect the power generation device 12 to the output unit 163. Furthermore, the power generation device 12 may be started by the user.

[0048] In the second state, the power generation device 12 generates AC power of, for example, 100 V. The generated power passes through the output unit 163, the second switching unit 213, the connection line 40, and the connection line 43, and reaches the third switching unit 223.

[0049] The current supplied to the third switching section 223 flows through the connection line 37 into the third switching section 221 and the third switching unit 22 .

[0050] The current that has flowed into the third switching unit 221 is supplied to the electrical load 131 via the connection line 41 , the connection line 38 , the second switching unit 211 and the output unit 161 .

[0051] The current that has flowed into the third switching unit 222 is supplied to the electrical load 132 via the connection line 42 , the connection line 39 , the second switching unit 212 and the output unit 162 .

[0052] Here, since the first switching unit 20 is in a cutoff state, the power generated by the power generation device 12 is not supplied to the distribution board 31 side.

[0053] In this way, when the commercial power source 11 is interrupted, power can be supplied from the power generation device 12 to the electric load 131 and the electric load 132. Therefore, the user can use the electric load 131 and the electric load 132 even during a power outage.

[0054] Moreover, the power generation device 12 can be connected to the power supply system 10 by a simple operation of inserting the plug of the power generation device 12 into the output unit 163 which is an outlet. Therefore, a dedicated connection tool for connecting the power generation device 12 to the power supply system 10 is not required. Moreover, the output unit 163 is an outlet disposed indoors, and therefore the user does not need to go outside to connect the power generation device 12 to the power supply system 10.

[0055] Here, priorities are set for the electrical loads 13, and when a power outage occurs, based on the instructions of the calculation control unit 32, power is supplied from the power generation device 12 to the electrical loads 13 with high priority, and power is not supplied to the electrical loads 13 with low priority.

[0056] For example, it is assumed that the electrical load 131 is a lighting fixture, the electrical load 132 is a dryer, and the priority of the electrical load 131 is higher than that of the electrical load 132. In such a case, the calculation control unit 32, for example, sets the third switching unit 221 to a conductive state while setting the third switching unit 222 to a cut-off state, supplies power to the electrical load 131, but does not supply power to the electrical load 132. In this way, by supplying power to the electrical load 131, which is a lighting fixture, the user can safely be active indoors during a power outage. Also, by not supplying power to the electrical load 132, which is a dryer, the limited output of the power generation device 12 can be effectively utilized.

[0057] 4 is a circuit diagram showing the operation of the power failure distribution board 19 in a third state when power is restored and the power generation device 12 is generating power. This state is the state within a predetermined time immediately after power is restored.

[0058] The conduction / interruption states of the first switching unit 20, the second switching unit 21, and the third switching unit 22 in the third state are the same as those in the second state described above. That is, based on an instruction from the calculation control unit 32, the first switching unit 20 is in an interruption state, the second switching unit 21 is in a conduction state, and the third switching unit 22 is in a conduction state. Therefore, similarly to the second state, the power generated by the power generation device 12 can be supplied to the electric load 131 and the electric load 132 via the third switching unit 22 and the second switching unit 21.

[0059] In this way, within a predetermined time immediately after power recovery, for example until the power generation device 12 stops, power is not supplied from the commercial power source 11 to the power supply system 10, and the power generated by the power generation device 12 is supplied to the electrical load 13, thereby preventing excessive power from being supplied to the electrical load 13 from both the commercial power source 11 and the power generation device 12. Here, the calculation control unit 32 can also be set to stop the power generation device 12 when the voltage V1 is, for example, about 100V and the voltage V2 (the voltage of the connection line 41, the connection line 42, or the connection line 43) is, for example, about 100V.

[0060] FIG. 5 is a circuit diagram showing the operation of power failure distribution board 19 in a fourth state when power is restored and power generation device 12 is stopped.

[0061] In the fourth state, the calculation control unit 32 sets the first switching unit 20 in a conductive state, the second switching unit 21 in a conductive state, and the third switching unit 22 in a cut-off state. Furthermore, the calculation control unit 32 stops the power generation device 12. After a predetermined time has elapsed since the voltage V1 became approximately 100V, the calculation control unit 32 changes the state of the power failure distribution board 19 from the third state to the fourth state.

[0062] Specifically, in the fourth state, a portion of the power supplied from commercial power source 11 is supplied to electrical load 131 via main breaker 33, breaker 341, first switching unit 201, connection line 38, second switching unit 211, and output unit 161. Another portion of the power supplied from commercial power source 11 is supplied to electrical load 132 via main breaker 33, breaker 342, first switching unit 202, connection line 39, second switching unit 212, and output unit 162.

[0063] Furthermore, it is also possible to remove the plug of the power generation device 12 from the output unit 163 and insert another electrical load 13 into the output unit 163. In this case, power is supplied to the electrical load 13 (not shown) via the main breaker 33, the breaker 343, the first switching unit 203, the connection line 40, the second switching unit 213, and the output unit 163.

[0064] The above is a description of the circuit configuration and operation of the power supply system 10 and the power failure distribution board 19.

[0065] The above-described embodiment can provide the following main effects.

[0066] According to the power supply system 10 of this embodiment, when a power outage occurs, the power generator 12 is connected to any one of the output units 16, and power is supplied to the electrical load 13 via this output unit 16 and the other output unit 16 via the in-house wiring 15, so that there is no need to install a generator outdoors in the event of a disaster, etc. Furthermore, in the event of an emergency, emergency power is supplied from any one of the output units 16 to the other output unit 16 via the existing in-house wiring 15, so there is no need to lay emergency wiring inside the building 14.

[0067] Furthermore, in the event of a power outage in which the power supply from the commercial power source 11 is cut off, emergency power is supplied from one of the output units 16 to the other output unit 16 via the third switching unit 22. Therefore, since emergency power is supplied by the switching operation of each switching unit, there is no need to install an emergency power supply outdoors, and furthermore, there is no need to lay emergency wiring indoors 14, and emergency power can be secured with a simple configuration.

[0068] Furthermore, by setting the first switching unit 20, the second switching unit 21 and the third switching unit 22 to a connected or disconnected state depending on each of the first and second states, it is possible to effectively supply power to the electrical load 13 via the output unit 16 and the indoor wiring 15 during a power outage.

[0069] Furthermore, by supplying power from the power generation device 12 to electrical loads 13 with high priority and not supplying power to electrical loads 13 with low priority, it is possible to make effective use of limited power during a power outage.

[0070] Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and modifications can be made without departing from the scope of the present invention. In addition, the above-described embodiments can be combined with each other.

[0071] The invention that can be understood from the above-described embodiment will be described below together with its effects.

[0072] The power failure distribution board of the present invention is a power failure distribution board interposed between a commercial power source and an output unit, and includes a plurality of first switching units, a plurality of second switching units, and a plurality of third switching units, wherein the plurality of first switching units each have a first terminal and a second terminal, the plurality of second switching units each have a third terminal and a fourth terminal, and the plurality of third switching units each have a fifth terminal and a sixth terminal, and the first terminal of the first switching units is connected to the commercial power source side, and the second terminal of the first switching units is connected to the third terminal of the second switching units, and the fourth terminal of the second switching units each have a fifth terminal and a sixth terminal. The terminal is connected to the output unit, the fifth terminal of the third switching unit is connected to a connection line connecting the second terminal of the first switching unit and the third terminal of the second switching unit, and the sixth terminals of the third switching units are connected to each other, and when power is supplied from the commercial power source to the output unit, the first switching unit is in a connected state, the second switching unit is in a connected state, and the third switching unit is in a cut-off state, and when the commercial power source is powered off, the first switching unit is in a cut-off state, the second switching unit is in a connected state, and the third switching unit is in a connected state. According to the power outage distribution board of the present invention, the power outage distribution board has a first switching unit, a second switching unit, and a third switching unit, and in a power outage state in which the power supply from the commercial power source is cut off, emergency power is supplied from one of the output units to the other output unit via the third switching unit. Therefore, there is no need to install emergency power outdoors, and further, there is no need to lay emergency wiring indoors, and emergency power can be secured with a simple configuration.

[0073] In addition, the power failure distribution board of the present invention can take a first state in which the commercial power supply is out of service and the power generation device is stopped, a second state in which the commercial power supply is out of service and the power generation device is generating electricity, a third state in which the commercial power supply is restored and the power generation device is generating electricity, and a fourth state in which the commercial power supply is restored and the power generation device is stopped. In the first state, the first switching unit is in a cut-off state, the second switching unit is in a cut-off state, and the third switching unit is in a cut-off state. In the second state, the first switching unit is in a cut-off state, the second switching unit is in a connected state, and the third switching unit is in a connected state. In the third state, the first switching unit is in a cut-off state, the second switching unit is in a connected state, and the third switching unit is in a connected state. In the fourth state, the first switching unit is in a connected state, the second switching unit is in a connected state, and the third switching unit is in a cut-off state. According to the power outage distribution board of the present invention, the first switching unit, the second switching unit and the third switching unit are set to a connected state or a disconnected state depending on each of the first and second states, so that power can be effectively supplied to electrical loads via the output unit and the in-house wiring during a power outage.

[0074] In addition, the power failure distribution board of the present invention is characterized in that a priority order is set for the electrical loads, and when the power failure occurs, power is supplied from the power generation device to the electrical loads with a high priority and power is not supplied to the electrical loads with a low priority. According to the power failure distribution board of the present invention, power is supplied from the power generation device to the electrical loads with a high priority and power is not supplied to the electrical loads with a low priority, so that limited power during a power failure can be effectively utilized. [Explanation of symbols]

[0075] 10. Power Supply System 11 Commercial power supply 12 Power generation equipment 13 Electrical Load 131 Electrical Load 132 Electrical Load 14 Indoor 15 Residential wiring 16 Output section 161 Output section 162 Output section 163 Output section 19 Power Outage Distribution Board 20 First switching unit 201 First Switching Section 202 First Switching Section 203 First Switching Section 21 Second switching unit 211 Second Switching Section 212 Second Switching Section 213 Second Switching Section 22 Third switching unit 221 Third Switching Section 222 Third Switching Section 223 Third Switching Section 231 1st terminal 232 1st terminal 233 1st terminal 241 2nd terminal 242 2nd terminal 243 2nd terminal 251 3rd terminal 252 3rd terminal 253 3rd terminal 261 4th terminal 262 4th terminal 263 4th terminal 271 5th terminal 272 5th terminal 273 5th terminal 281 6th terminal 282 6th terminal 283 6th terminal 29 Electric wire 30 Housing 31 Distribution Board 32 Calculation control unit 33 Main breaker 341 Breaker 342 Breaker 343 Breaker 37 Connecting wire 38 Connecting wire 39 Connecting wire 40 Connection Line 41 Connection Line 42 Connection Line 43 Connecting wire V1 Voltage V2 Voltage

Claims

1. A power supply system that supplies power from a power generating device (excluding those connected via a transformer) to an electrical load via an output section when the commercial power supply is interrupted. The device includes a calculation control unit, a first switching unit, a second switching unit, and a third switching unit, The arithmetic and control unit is When the power outage is not occurring, power is supplied from the output unit to the electrical load via the first switching unit and the second switching unit; A power supply system characterized in that, when a power outage occurs, power supplied from the power generation device via one of the output units is supplied to the electrical load via the second switching unit, the third switching unit, and the other output unit.

2. The arithmetic and control unit is The power supply system according to claim 1, characterized in that a connection status of a switching unit included in the first switching unit, the second switching unit or the third switching unit is changed based on a voltage of a connection line connecting the first switching unit and the second switching unit.

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