JP6062700B2 - Building power supply system - Google Patents

Description

  The present invention relates to a power supply system for a building.

  In recent years, automobiles equipped with relatively large capacity batteries such as electric cars and hybrid cars have been put into practical use. Electric power is supplied from the automobile side to the building side using the large capacity in-vehicle battery. A technique for driving an electrical device in a building has been proposed (see, for example, Patent Document 1).

  More specifically, for example, a connection part (power supply inlet) that is electrically connected to an electrical device in the building is provided on the outer wall of the building, and one end of the power supply cable is connected to the connection part. Connect the other end to the car side. Then, power supply from the vehicle side to the building side is performed after enabling the power supply via the power supply cable on the vehicle side.

JP 2011-130647 A

  However, in the power feeding cable, it is conceivable that the insulation coating is damaged due to deterioration or damage, and an unintended grounding (ground fault) occurs through the damaged portion. In this case, if a ground fault occurs, it is possible that electric power cannot be properly supplied from the automobile to the building, which may hinder the operation of electrical equipment in the building.

  Further, if the ground fault is left as it is, the inconvenience that power is wasted from the in-vehicle battery is generated. For this reason, when a ground fault abnormality occurs in the power supply cable, it is desirable that the user confirm it promptly.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a building power supply system that allows a user to quickly confirm an abnormality when a power supply cable abnormality occurs.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary. In the following, for easy understanding, the corresponding configuration in the embodiment of the invention is appropriately shown in parentheses, but is not limited to the specific configuration shown in parentheses.

The first invention is
A building power supply system that enables power supply from an automobile (41) to an electrical device (22, etc.) provided in the building (10),
A power supply cable (52) extending from the building and connected to a discharge terminal portion (43) of the automobile is provided, and at least a part of an electric path connecting the electric device and the automobile is formed by the power supply cable. And
The automobile is provided with an operation part (44) operated by a user to allow power output from the discharge terminal part,
Abnormality detection means (65-67) for detecting that an abnormality that causes power supply failure has occurred in the power supply cable;
Display units (71, 85) for displaying a warning in accordance with the result of abnormality detection by the abnormality detection means;
With
When the electrical connection between the building side and the automobile side by the power supply cable and the operation of the operation unit by the user are performed and the electric path is in an energized state, the user can visually recognize at that time. The display unit is provided at a position.

  In a power supply system that enables power supply from an automobile to a building, if an abnormality occurs in the power supply cable that connects the two, power supply from the automobile to the building will be hindered, and the electrical equipment in the building will operate as desired. Can not be made. In this regard, since it is configured to detect that an abnormality that causes power feeding failure has occurred in the power feeding cable and to perform a warning display by the display unit according to the detection result, the user is informed of the occurrence of the abnormality, Action can be encouraged.

  In addition, an automobile is provided with an operation unit that is operated by a user to allow power output from the discharge terminal part. When power is supplied (started) from the automobile side to the building side, power is supplied. In addition to the electrical connection between the building side and the automobile side using a cable, the user operates the operation unit. Then, the power supply from the automobile side is started when the electrical path (the electrical path connecting the electrical device and the automobile) is energized by these cable connections and user operations. In this case, since the display unit is provided at a position that can be seen by the user when the electrical path is energized (that is, when the cable connection and the user operation is completed), the abnormality is detected when an abnormality occurs in the power supply cable. The user can confirm immediately. Therefore, it is possible to suppress the inconvenience that the situation where power supply from the automobile side to the building side is unexpectedly continued or the battery power on the automobile side is consumed wastefully is suppressed.

  According to a second aspect of the present invention, the automobile has the discharge terminal portion and the operation unit in a vehicle interior, and the display unit operates the operation unit in the vehicle interior by a user and the power supply cable. It is provided at a position that can be seen from the window (46) of the automobile when the connection with the discharge terminal portion is completed.

  According to the said structure, when a user gets in a motor vehicle and completes operation of an operation part and the connection with the discharge terminal part of an electric power feeding cable, a display part can be visually recognized through a window. Therefore, even if the door of the automobile is closed (even if the door of the automobile is not opened to view the display section), the warning display on the display section can be confirmed. In addition, the display part is good to be provided in the same height position as the window of a motor vehicle, or its vicinity.

  According to a third aspect of the present invention, the parking space (P) for parking the automobile is provided with position defining means (75) for regulating the parking position of the automobile at a predetermined position. It is provided at a position visible from the window on the assumption that the vehicle is parked at a position defined by the position defining means.

  When the parking position of the automobile is defined by the position defining means, the range that is visible to the user in the automobile is automatically determined. Therefore, by providing the display unit in consideration of this, it is possible to realize a preferable configuration for improving the visibility of the display unit.

  In a fourth aspect of the invention, the automobile has a power operation section (44) operated by a user to start energization of an electric system in the automobile, which corresponds to the operation section, and the power supply The power output from the discharge terminal unit is permitted in accordance with the power-on operation of the operation unit.

  An automobile generally has a power operation unit (also referred to as a power switch, an IG switch, or the like) for starting energization of an electric system. In the present invention, from the automobile side on condition of operation of the power operation unit. Is allowed to discharge. In this case, power supply from the automobile side to the building side may be started at the timing when the operation of the power supply operation unit is performed as the power supply start operation. If an abnormality occurs at the start of the power supply, a warning regarding the abnormality The display is made on the display unit. Therefore, it is possible to quickly check whether there is an abnormality by the user.

Here, the “energized state” may be the following state.
-The energized state is an electric path that connects the electric device and the automobile by the user operating the operation unit in a state where the building side and the automobile side are electrically connected by the power feeding cable. Is in a state of being energized (fifth invention).
The energized state is a state in which an electric path connecting the electric device and the automobile is energized when the power supply cable is connected to the discharge terminal unit in a state where the operation unit is operated by a user. (Sixth invention).

  In the fifth aspect of the invention, when the user operates the operation unit when power is supplied (started) from the automobile side to the building side, the display unit is provided at a position visible to the user. Yes.

  In the sixth aspect of the invention, the display unit is provided at a position that is visible to the user when the power supply cable is connected to the discharge terminal unit when power is supplied (started) from the automobile side to the building side. It has become.

  In addition, the “energized state” may be the following state. That is, the energization state is determined by connecting the power supply cable and the building side in a state where the power supply cable is connected to the discharge terminal portion and the operation unit is operated by a user. And an electric path connecting the automobile and the vehicle. In this case, when the power supply from the automobile side to the building side is performed (started), the display unit is provided at a position that can be seen by the user when the power supply cable is connected to the building side. It has become.

  According to a seventh aspect of the present invention, the building is provided with a connection portion (51) that enables connection and separation of the power supply cable, and an insulating transformer (63) is provided in an electrical path that connects the connection portion and the electric device. A grounding element (65) is provided in a ground path on the transformer primary side as the abnormality detection means on the primary side (connection side) of the insulating transformer, and the ground fault of the power feeding cable is provided. Current detection means (66) for detecting a ground fault current flowing through the grounding element when it is generated is provided.

  In the above configuration, since the abnormality detection means is provided on the building side separately from the power supply cable, the abnormality detection means can be applied regardless of which power supply cable is used (even if the power supply cable is replaced). That is, the abnormality detection function can be applied as it is even after the power supply cable is replaced due to deterioration.

  According to an eighth aspect of the invention, the display unit is configured to be able to variably adjust the height position.

  Since the height position of the display unit can be adjusted, the position of the display unit can be adjusted to a position that is easy to see for a user who gets into the automobile.

  The ninth invention is characterized in that the display section (85) is integrated with the power supply cable and is provided at a position where it can be visually recognized by the user when the power supply state is established.

  By providing the display unit integrally with the power feeding cable, when an abnormality occurs, it is easy to associate that the abnormality has occurred in the power feeding cable. For example, a display unit may be provided in the connector unit of the power supply cable.

  In a tenth aspect of the invention, the building is configured to be supplied with commercial power from a system power source, and an electric path depending on which of the commercial power and the power supplied from the automobile is supplied to the electric device. Switching means (31) for switching the power supply, the power supply path to the electrical equipment is a path on the automobile side by switching the switching means, and the power supply cable is connected to the discharge terminal portion, Power is supplied from the automobile side to the building side.

  In buildings with switching means for power switching, various electric devices are normally operated with commercial power from the system power supply, and in emergency situations such as power outages, the electric devices are operated with power supplied from automobiles. Can do. In this case, as described above, an abnormality in the power feeding cable can be detected and a warning display can be suitably displayed, so that power can be appropriately supplied from the automobile in an emergency or the like.

Schematic which shows the electric constitution of the electric power feeding system in a building. The block diagram which shows the specific structure of a relay apparatus. The figure which shows the state which looked at the building from the parking space side. The figure which shows the structure which provided the ground fault alarm integrally in the electric power feeding inlet. The figure which shows another structure regarding the installation place of a ground fault alarm device. The figure which shows the structure which provided the display part integrally in the electric power feeding cable.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings. The present embodiment embodies a power feeding system in a building composed of a detached house. In particular, in that building, an in-vehicle battery mounted on an automobile can be used as an emergency power source (auxiliary power source). FIG. 1 is a schematic diagram showing an electrical configuration of a power feeding system in a building 10.

  In FIG. 1, a pole transformer 11 is installed on a utility pole or the like provided outside the building 10, and commercial power of AC 100 V / 200 V supplied from the system power supply is supplied to the building 10 via the pole transformer 11. To be supplied. The pole transformer 11 is a transformer for converting high voltage power (AC6600V) flowing through the distribution line 12 into low voltage power (AC100V / 200V). The low voltage power converted by the pole transformer 11 is supplied to the building 10 through a single-phase three-wire transmission line 13.

  The neutral wire on the secondary side (AC100V / 200V side) of the pole transformer 11 is grounded, whereby a grounding electric circuit is formed on the secondary side of the pole transformer 11, that is, on the building 10 side.

  The building 10 is provided with a watt hour meter 15 (meter) connected to the power transmission line 13 and a distribution board 16 connected to the watt hour meter 15. The distribution board 16 includes an overcurrent breaker 17 (ampere breaker) that automatically cuts off the power path when a current exceeding the contract amount flows, and a leakage breaker that automatically cuts off the current path when a leakage occurs. 18 and a circuit breaker 19 (circuit breaker) for wiring that opens and closes a current path for each of a plurality of circuits provided in the building 10.

  The building 10 is provided with a living circuit 21 which is an electric circuit for living as one of a plurality of circuits. The living circuit 21 includes, for example, an electric device such as a lighting fixture 22, a lighting switch 23, and an outlet 24, and a unit cable 25 connected to these devices.

  The distribution board 16 and the living circuit 21 are connected via a circuit changeover switch 31. The circuit selector switch 31 is a switching means for switching the power supply source to the living circuit 21, and includes a switching piece 32 that is operated by a manual operation by the user and two switching contacts (first contact 33a and second contact 33b). And have. In the state shown in the figure, the switching piece 32 is on the first contact 33 a side, and commercial power of AC 100 V is supplied from the distribution board 16 to the living circuit 21.

  Moreover, in this electric power feeding system, the vehicle-mounted battery of a motor vehicle is used as a power supply, and the electric power supply from the vehicle-mounted battery to the building 10 side is possible. The power supplied from the in-vehicle battery can be used, for example, in the event of a power failure when the power supply of the system power supply is stopped. In this sense, the in-vehicle battery serves as an emergency power source. Furthermore, the power supplied from the in-vehicle battery can be used at times other than during a power failure. In this sense, the in-vehicle battery serves as an auxiliary power source. Below, the structure concerning the electric power supply from the motor vehicle side to the building side is demonstrated.

  As shown in FIG. 1, a parking space P is provided on the side of the building 10, and an automobile 41 is parked in the parking space P. The automobile 41 is, for example, a hybrid automobile having an engine and a motor as a driving power source, and a battery 42 having a relatively large capacity is mounted on the vehicle 41 because it requires power supply to the driving motor. The automobile 41 can also be assumed to be an electric car having a relatively large capacity battery.

  In addition, the automobile 41 is provided with a discharge terminal portion 43 that is electrically connected to the battery 42 and enables the electric power to be taken out from the battery 42. The discharge terminal portion 43 is provided, for example, at a center console in the passenger compartment of the automobile 41, and the AC 100 V power can be discharged from the discharge terminal portion 43.

  In addition, the automobile 41 is provided with an operation unit that is operated by a user to allow discharge (power output) from the discharge terminal unit 43. In the automobile 41 of the present embodiment, a power operation section 44 that is rotated by inserting a power key of the automobile 41 is provided as the operation section. More specifically, the driver's seat of the automobile 41 is provided with a power operation portion 44 having a key insertion hole into which a power key is inserted. In the power operation portion 44, the power supply inserted into the key insertion hole is provided. When the user turns the key to a predetermined position, the automobile 41 can be shifted to the discharge permission state. By the way, operations for the power supply operation unit 44 in normal use of the automobile 41 include an accessory on operation (ACC operation), a power on operation (ON operation), and a starter start operation (STA operation). The operation corresponds to an operation for permitting discharge. The power-on operation is an operation for making a transition to a state where all electric systems are energized in the automobile 41.

  The power operation unit 44 may be provided separately from the power key insertion unit. For example, in a configuration in which authentication by wireless communication is performed on the automobile 41 side and the power key side, if the power key exists near the vehicle-side receiving unit, the power operation unit 44 can be operated effectively. In this case, for example, a configuration in which discharge (power output) from the discharge terminal portion 43 is permitted by pressing a power operation switch provided in the driver's seat may be employed.

  In the building 10, a power supply inlet 51 serving as a power intake port from outside the building to the building is provided on the outer wall portion 10 a adjacent to the parking space P. The power supply inlet 51 can connect and disconnect the power supply cable 52. In this case, the power supply cable 52 has connectors 53 and 54 at both ends, respectively. One connector 53 can be connected to the power supply inlet 51 on the building 10 side, and the other connector 54 is on the vehicle 41 side. It can be connected to the discharge terminal portion 43.

  Here, since the power supply inlet 51 is provided on the building outer wall 10a, when the user goes outside, the work of connecting one end (connector 53) of the power supply cable 52 to the power supply inlet 51 is easily performed outdoors. it can. On the other hand, since the discharge terminal portion 43 of the automobile 41 is provided in the passenger compartment, the user connects the other end (connector 54) of the power supply cable 52 to the discharge terminal portion 43 of the automobile 41. (Or letting a part of the body enter the passenger compartment), and then the operation of connecting the power supply cable 52 to the discharge terminal portion 43 is performed.

  In the building 10, a relay device 61 is provided on an electrical path that connects the circuit changeover switch 31 and the power supply inlet 51. The relay device 61 has a function of monitoring electric leakage and ground fault when power is supplied from the automobile 41 to the building 10. When the switching piece 32 is switched to the second contact 33b side in the circuit changeover switch 31, the automobile 41 and the living circuit 21 can be electrically connected, and in this state, the automobile 41 side to the living circuit 21 is connected via the relay device 61. The power supply is performed.

  Next, a specific configuration of the relay device 61 will be described. FIG. 2 is a block diagram illustrating an electrical configuration of the relay device 61.

  In the relay device 61, an insulating transformer 63 is provided in the electric path 62 that connects the circuit changeover switch 31 and the power supply inlet 51. The insulating transformer 63 has a primary side connected to the power supply inlet 51 and a secondary side connected to the circuit changeover switch 31 (specifically, connected to the circuit changeover switch 31 via the protection circuit 64). The insulating transformer 63 is provided to form a grounding circuit in the living circuit 21 when the living circuit 21 is connected to the automobile 41 side instead of the distribution board 16 by the circuit changeover switch 31. The side is grounded.

  In this case, by making the secondary side of the insulation transformer 63 a grounding circuit, a protection circuit of the same system as the system power supply side (distribution panel 16) can be provided on the secondary side with respect to leakage and ground fault. A protection circuit 64 having an overcurrent circuit breaker and an earth leakage circuit breaker is provided on the secondary side of the insulating transformer 63. As a result, in the state where the automobile 41 is electrically connected to the building 10 by the power supply cable 52 and power is supplied from the automobile 41 side to the building 10 side, electric leakage or ground fault occurs on the secondary side of the insulating transformer 63. If it occurs, the protection circuit 64 detects the leakage or ground fault. Then, a switch (not shown) provided in the protection circuit 64 is turned off, and leakage or earth fault is interrupted.

  In addition, a ground path is provided on the primary side of the insulating transformer 63. A grounding capacitor 65 is provided as a grounding element in the ground path, and a current is passed through an electrical path that connects the grounding capacitor 65 and the ground point. A current sensor 66 is provided as detection means. Further, a comparison circuit 67 is connected to the current sensor 66, and when the current value detected by the current sensor 66 exceeds a predetermined value, the output of the comparison circuit 67 is switched from low to high. Yes. Instead of the grounding capacitor 65, a high-resistance resistance element can be used.

  A ground fault alarm 71 as a display unit is provided on the output terminal side of the comparison circuit 67, and the ground fault alarm 71 is turned on when the output of the comparison circuit 67 is switched to high. The ground fault alarm 71 has a warning lamp 72, and the user can be informed of the occurrence of a ground fault in the power supply cable 52 by lighting the warning lamp 72. The ground fault alarm device 71 may include a battery or the like as an operating power source.

  Here, assuming that a ground fault abnormality has occurred in the power supply cable 52, for example, at the point X in the figure in a state where the automobile 41 is electrically connected to the building 10 by the power supply cable 52, the path indicated by Y in the figure. A ground fault current flows. In this case, when a ground current flows through the grounding capacitor 65, the current is detected by the current sensor 66, and the output of the comparison circuit 67 becomes high. Thereby, the warning by the ground fault alarm 71 is implemented.

  In the present embodiment, when a ground fault alarm is notified by the ground fault alarm device 71, an aspect related to the installation of the ground fault alarm device 71 is provided so that the user can quickly and surely recognize the notification state. This point is described below.

  As described above, in the automobile 41, the discharge terminal portion 43 and the power supply operation portion 44 are provided in the vehicle interior. Therefore, when power is supplied from the automobile 41 side to the building 10 side, the user gets into the automobile 41 and connects the power supply cable 52 to the discharge terminal portion 43 or operates the power supply operation portion 44. There is a need to. In the present embodiment, the user's work is taken into consideration, and then the ground fault abnormality can be quickly grasped.

  FIG. 3 is a diagram illustrating a state in which the building 10 is viewed from the parking space P side, and an automobile 41 parked in the parking space P is indicated by a virtual line (broken line).

  In FIG. 3, a car stop 75 is provided on the ground surface of the parking space P, and the actual parking position of the automobile 41 in the parking space P is determined to some extent by the car stop 75. A ground fault alarm 71 is attached at a position next to the window 46 of the automobile 41 when the automobile 41 is parked in accordance with the car stop 75. The ground fault alarm 71 may be provided at the same height as the window 46. In FIG. 3, in addition to the warning lamp 72, the ground fault alarm 71 is provided with a discharge lamp 73 indicating that the vehicle 41 is being discharged (during discharging).

  Next, a series of flows will be described in the case where power is supplied from the automobile 41 side to the building 10 side.

  For example, when the power supply from the system power supply is stopped (when a power failure occurs), the voltage of the power transmission line 13 becomes 0 V, and the use of electric equipment using commercial power in the building 10 becomes impossible. In such a case, the user first operates the circuit selector switch 31 on the building 10 side to switch the switching contact that is in the conductive state (ON state) from the first contact 33a to the second contact 33b. In addition, when the user intends to use the power supplied from the automobile 41 instead of the commercial power from the system power supply other than at the time of a power failure, the switching contact of the circuit changeover switch 31 is changed from the first contact 33a to the second as described above. It is switched to the contact 33b.

  Next, one end of the power supply cable 52 is connected to the power supply inlet 51 and the other end is connected to the discharge terminal portion 43 of the automobile 41 outdoors. At this time, since the discharge terminal portion 43 is in the vehicle interior, the user opens the door of the automobile 41 and gets into the vehicle interior, and then connects the power supply cable 52 to the discharge terminal portion 43.

  Thereafter, the user performs a discharge permission operation for allowing the automobile 41 to discharge from the discharge terminal portion 43. Specifically, when the user performs a predetermined operation (power-on operation) on the power operation unit 44, the automobile 41 is set in a discharge permission state. Thus, when the automobile 41 is in a discharge-permitted state, the electrical path that connects the living circuit 21 of the building 10 and the automobile 41 is energized. That is, power is supplied from the battery 42 of the automobile 41 to the building 10 side, and each device of the living circuit 21 is activated by the supplied power.

  If the power supply cable 52 is damaged (for example, the insulation coating has been peeled off) and a ground fault has occurred at the damaged part, the relay device 61 detects a ground fault current that flows due to the ground fault. The Then, an alarm (warning) is performed by the ground fault alarm device 71 in accordance with the detection of the ground fault current. At this time, since the ground fault alarm device 71 is provided at a position where the user can easily see even when the user gets into the automobile 41, the ground fault abnormality can be quickly grasped. In addition, it is possible to quickly cope with an abnormality such as replacing the power supply cable 52.

  Supplementally, in the configuration in which discharge from the vehicle 41 side is permitted (started) by the operation (power-on operation) of the power supply operation unit 44 of the vehicle 41 as described above, the user is prepared in advance such as connection of the power supply cable 52. After all the operations are completed, it is considered that the operation (power-on operation) of the power operation unit 44 is finally performed. In this case, if a ground fault abnormality has occurred, a warning display by the ground fault alarm device 71 is performed immediately after the operation of the power supply operation unit 44. The ground fault abnormality can be grasped quickly without leaving the automobile 41.

  In the above description, for example, when a power failure occurs, “switch operation of the circuit selector switch 31”, “inlet connection of the power supply cable 52”, “connection of the power supply cable 52 to the vehicle”, and “power-on operation” are performed in this order. Although implemented, it is conceivable that a series of treatments are performed outside this order.

  For example, the order may be “switching operation of the circuit switch 31” → “inlet connection of the power supply cable 52” → “power-on operation” → “connection of the power supply cable 52 to the vehicle”. In this case, it is assumed that a predetermined electrical path (an electrical path connecting the living circuit 21 of the building 10 and the automobile 41) is energized by performing the “connection of the feeding cable 52 on the automobile side”. A ground fault alarm 71 is provided at a position visible to the user at the time.

  Further, it may be in the order of “switching operation of the circuit changeover switch 31” → “power-on operation” → “connection of the power supply cable 52 to the vehicle” → “inlet connection of the power supply cable 52”. In this case, it is assumed that a predetermined electrical path (an electrical path connecting the living circuit 21 of the building 10 and the automobile 41) is energized by performing the “inlet connection of the power feeding cable 52”. A ground fault alarm 71 is provided at a position visible to the user. Note that the order of “power-on operation” and “connection of the power supply cable 52 to the vehicle” may be reversed.

  In each of the above examples, the “switching operation of the circuit selector switch 31” is the first, but the order may be a different order as long as it is not the last of the series of treatments.

  According to the embodiment described in detail above, the following excellent effects can be obtained.

  When the connection of the power supply cable 52 and the operation of the power operation unit 44 by the user are performed and a predetermined electrical path (electrical path connecting the living circuit 21 of the building 10 and the automobile 41) is energized, the user at that time The ground fault alarm device 71 (display unit) is provided at a position where it can be visually recognized. In the present embodiment, the installation location of the ground fault alarm device 71 is the outer wall portion 10a of the building 10 adjacent to the parking space P. In this case, since the ground fault alarm 71 is provided at a position that can be seen by the user when the predetermined electrical path is energized (for example, when the user operates the power operation unit 44), the power supply cable 52 is abnormal. The user can quickly confirm the abnormality when it occurs. Therefore, it is possible to suppress the inconvenience that the power supply from the automobile 41 side to the building 10 side is unexpectedly continued or the battery power of the automobile 41 side is consumed unnecessarily.

  In particular, the ground fault alarm 71 is provided at a position that can be seen from the window 46 of the automobile 41 when the user operates the power operation unit 44 in the passenger compartment. According to this configuration, even if the door of the automobile is closed (in other words, without opening the automobile door to see the ground fault alarm 71), the user can The warning display can be confirmed.

  The parking position of the automobile 41 is defined by providing a car stop 75 in the parking space P, and a ground fault alarm 71 is provided at a position where the parking position can be seen from the window 46 of the automobile. Thereby, a configuration suitable for improving the visibility of the ground fault alarm device 71 can be realized.

  A discharge permission operation is performed using a power supply operation unit 44 provided in the automobile 41. In this case, it is considered that the power supply operation unit 44 of the automobile 41 is maintained in the off state when the automobile 41 is not used, and is operated in the on state only during use. Therefore, when power is supplied from the automobile 41, it is considered that the discharge permission operation by the power supply operation unit 44 is finally performed in a state where all preparations such as connection of the power supply cable 52 have been completed. Considering this point, the visibility of the ground fault alarm device 71 is devised, so that a practically excellent configuration can be realized.

  In the relay device 61, a grounding capacitor 65, a current sensor 66, and a comparison circuit 67 are provided on the primary side of the insulating transformer 63 as abnormality detection means. In this configuration, since the abnormality detection means is provided on the building 10 side separately from the power supply cable 52, the abnormality detection means can be applied regardless of which power supply cable is used (even if the power supply cable is replaced). That is, the abnormality detection function can be applied as it is even after the power supply cable is replaced due to deterioration.

  In the building 10, the power supply from the system power supply and the power supply from the automobile 41 can be switched. For example, the power supply from the in-vehicle battery 42 is performed as an emergency power supply during a power failure. In this case, as described above, an abnormality in the power feeding cable 52 can be detected and a warning can be suitably displayed, so that power supply from the automobile 41 in an emergency or the like can be appropriately performed.

[Other Embodiments]
The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  -It is good also as a structure which provides the ground fault alarm device 71 integrally in the electric power feeding inlet 51. FIG. Specifically, as shown in FIG. 4, a ground fault alarm 71 (for example, an alarm lamp) may be provided in the vicinity of the cable insertion portion of the power supply inlet 51. In FIG. 4, a rail 81 extending in the vertical direction is provided on the outer wall portion 10 a in order to make the height position (H in the figure) of the ground fault alarm 71 variable, and a power feeding inlet is provided along the rail 81. 51 can move. In this case, the height position of the ground fault alarm 71 is changed with the movement of the power supply inlet 51. Since the height position of the ground fault alarm device 71 can be adjusted, the position of the ground fault alarm device 71 can be adjusted to a position that is easy for the user who has entered the automobile 41 to see.

  It is also possible to adopt a configuration in which the ground fault alarm 71 can be moved in the lateral direction (horizontal direction) in addition to the height direction.

  -You may change the place and structure which install the ground fault alarm device 71. For example, as shown to Fig.5 (a), it is set as the structure which installs the ground fault alarm device 71 in the pole 85 (or standing wall) erected in the parking space P. As shown in FIG. In this case, the height position at which the ground fault alarm device 71 is provided is a position at which the user can visually recognize even when the user is inside the automobile 41. In the pole 85, the ground fault alarm 71 may be movable in the longitudinal direction (that is, the vertical direction). For example, the pole 85 is provided with a rail portion extending in the longitudinal direction (that is, the vertical direction), and the ground fault alarm 71 can be moved along the rail portion.

  In addition, as shown in FIG. 5B, in a configuration in which a movable gate 86 (gate) is provided at the entrance / exit part where the automobile 41 enters and exits in the parking space, a ground fault alarm 71 is installed at the gate 86. And In this case, the gate 86 is a position that can be visually recognized from the parking space side (the former side of the parking space side and the anti-parking space side of the gate 86) and can be visually recognized even when the user is in the automobile 41. A ground fault alarm 71 is provided at the height position.

  In short, the ground fault alarm device 71 may be provided at a predetermined height in the parking space P or a structure standing in the vicinity thereof.

  -It is good also as a structure which provides a display part integrally in a feeding cable. That is, in FIG. 6A, the alarm lamp 91 as a display unit is attached to the connector 54 on the automobile side in the power supply cable 52. In FIG. 6B, an alarm lamp 91 is attached to the electric wire portion of the power feeding cable 52. In FIG. 6C, an alarm lamp 91 is attached to the building-side connector 53 in the power feeding cable 52.

  6 (a) to 6 (c), when the power supply cable 52 is connected and the power is turned on and a predetermined electrical path is energized (for example, when the operation of the power operation unit 44 is completed). ), A warning lamp 91 may be provided at a position that can be visually recognized by the user. 6 (a) and 6 (b), a warning lamp 91 is provided in a portion of the power supply cable 52 that is considered to be brought into the vehicle interior (a portion near the connector 54 in the case of an electric wire portion). In FIG. 6C, the height position (H in the figure) of the power supply inlet 51 is equivalent to the window height of the automobile 41, and a warning lamp 91 is provided on the connector 53 inserted into the power supply inlet 51. ing.

  ・ It can also be applied to buildings with an internal garage. In this case, a ground fault alarm 71 may be provided on the wall surrounding the inner garage parking space. Alternatively, a ground fault alarm 71 may be provided on an opening / closing body such as a shutter provided at the entrance / exit of the parking space. In the inner garage, since the actual parking position of the automobile is determined to some extent, it is convenient to determine the position of the ground fault alarm 71 in consideration of visibility.

  In the above embodiment, the relay device 61 is provided on the electrical path connecting the circuit changeover switch 31 and the power supply inlet 51. However, the relay device 61 may not be provided. In this case, since the insulating transformer 63 in the relay device 61 is not used, a non-grounded electric circuit is formed in the living circuit 21 when the living circuit 21 is separated from the distribution board 16 and connected to the automobile 41 side. It will be. However, even in such a case, it is only necessary to detect an abnormality in the power feeding cable 52 and display the detection result on the ground fault alarm 71 or the like.

  In the above embodiment, the power supply inlet 51 capable of connecting and separating the power supply inlet 51 is provided on the outer wall portion 10 a of the building 10, and one end of the power supply cable 52 is connected to the power supply inlet 51. It is good also as a structure which provides the electric power feeding cable 52 so that it may extend from the outer wall part 10a of the building 10 without providing. That is, it is preferable that the power supply cable is a wall-fixed type and can be accommodated by winding or the like.

  In the above embodiment, the discharge terminal portion 43 is provided in the center console in the passenger compartment of the automobile 41. However, the present invention is not limited to this, and the discharge terminal portion 43 may be provided in the trunk room of the automobile 41. . Or you may provide the discharge terminal part 43 in the site | part which can connect operation of a cable from the vehicle body (vehicle body) instead of the vehicle interior of the motor vehicle 41 from the vehicle exterior. For example, the discharge terminal portion 43 may be provided on the side of the vehicle body, or may be provided on the front surface or the rear surface of the vehicle body.

  The “operation unit” operated by the user to allow power output from the discharge terminal unit may also be provided outside the vehicle body instead of the vehicle interior. For example, the “operation unit” may be provided on the side of the vehicle body, or may be provided on the front surface or the rear surface of the vehicle body. In this case, it is preferable that the discharge terminal portion and the operation portion are provided at positions close to each other so that the connection of the power supply cable to the discharge terminal portion and the subsequent operation of the operation portion can be continuously performed. Even when the operation unit is provided outside the vehicle body, when the power supply cable 52 is connected and the power is turned on, a predetermined electrical path is energized (for example, when the operation of the operation unit is completed by the user). It is preferable that a display unit (ground fault alarm 71) is provided at a position that can be visually recognized by the user. For example, in a configuration in which the operation unit is provided on the front surface of the vehicle body, the display unit may be provided on a facing portion (a building outer wall, a pole, or the like) facing the front surface of the vehicle body.

  In the above-described embodiment, the ground fault abnormality is detected as the abnormality detection of the power feeding cable 52. However, the present invention is not limited to this, and a configuration of detecting a leakage abnormality may be employed. When electric leakage occurs, it is good to display with a display part (warning lamp).

  -It is good also as a structure which outputs direct-current power instead of outputting alternating current power (AC100V) from the discharge terminal part 43 in the motor vehicle 41. FIG.

  -The structure which connects the electric power feeding cable 52 to the living circuit 21 directly may be sufficient.

  The warning mode of the ground fault alarm 71 may be a mode other than lamp display. For example, a ground fault alarm 71 may be provided with a liquid crystal display unit, and the abnormal content may be displayed as an image on the liquid crystal display unit. For example, “The power cable is damaged. It is recommended to display a warning message such as “”. In addition to the lamp display and the image display, an audio warning may be performed.

  -As a position control means provided in the parking space P, you may use structures other than the car stop 75. FIG. For example, a configuration in which a position regulation line such as a white line is drawn in the parking space P may be used.

  -As a motor vehicle provided with the vehicle-mounted battery as an emergency power supply (auxiliary power supply), what is called a plug-in hybrid vehicle (PHV) in which the vehicle-mounted battery can be charged from the building side may be used.

  DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Transformer on pole, 21 ... Living circuit, 22 ... Lighting equipment (electrical equipment), 31 ... Circuit switch (switching means), 41 ... Automobile, 42 ... Battery, 43 ... Discharge terminal part, 44 ... Power supply operation unit (operation unit) 51... Power supply inlet (connection unit) 52... Power supply cable 63 63 insulation transformer 65 grounding capacitor (abnormality detection means, grounding element) 66 current sensor (abnormality detection means) , Current detection means), 67 ... comparison circuit (abnormality detection means), 71 ... ground fault alarm (display section), 75 ... car stop (position defining means), 91 ... warning lamp (display section), P ... parking space.

Claims (9)

A building power supply system that enables power supply from an automobile to electrical equipment provided in a building,
A power supply cable extending from the building and connected to a discharge terminal portion of the automobile is provided, and at least a part of an electric path connecting the electric device and the automobile is formed by the power supply cable,
The automobile is provided with an operation unit operated by a user to allow power output from the discharge terminal unit,
An abnormality detecting means for detecting that an abnormality that causes power feeding failure has occurred in the power feeding cable;
A display unit that displays a warning according to the result of abnormality detection by the abnormality detection unit;
With
When the electrical connection between the building side and the automobile side by the power supply cable and the operation of the operation unit by the user are performed and the electric path is in an energized state, the user can visually recognize at that time. The display unit is provided at a position ,
The automobile has the discharge terminal part and the operation part in a passenger compartment,
The display unit is provided at a position that is visible from the window of the automobile when the operation of the operation unit in the vehicle interior by the user and the connection with the discharge terminal unit of the power supply cable are completed.
The building power supply system according to claim 1, wherein the operation of the operation unit in the passenger compartment by the user is an operation for shifting the electric system of the automobile to an energized state in a driver's seat . The parking space for parking the automobile is provided with position defining means for defining the parking position of the automobile at a predetermined position,
2. The power feeding of a building according to claim 1 , wherein the display unit is provided at a position that can be seen from the window on the assumption that the automobile is parked at a position defined by the position defining means. system. The automobile has a power operation unit that is operated by a user to start energization of an electric system in the automobile, and this corresponds to the operation unit,
The power supply system for a building according to claim 1 or 2 , wherein power output from the discharge terminal unit is permitted in accordance with a power-on operation of the power operation unit. In the energized state, when the operation unit is operated by a user in a state where the building side and the automobile side are electrically connected by the power feeding cable, an electric path connecting the electric device and the automobile is provided. The building power supply system according to any one of claims 1 to 3 , wherein the building is energized. The energized state is a state in which an electric path connecting the electric device and the automobile is energized by connecting the power feeding cable to the discharge terminal unit in a state where the operation unit is operated by a user. The building power supply system according to any one of claims 1 to 3 , wherein The building is provided with a connecting portion that enables connection and separation of the power feeding cable, and an insulating transformer is provided in an electrical path that connects the connecting portion and the electric device,
On the primary side of the isolation transformer, as the abnormality detection means, a grounding element is provided in the ground path on the primary side of the transformer, and a ground fault current flowing through the grounding element is detected when a ground fault occurs in the power feeding cable. 6. The building power supply system according to any one of claims 1 to 5, further comprising a current detection unit. The power supply system for a building according to any one of claims 1 to 6 , wherein the display unit has a configuration in which a height position can be variably adjusted. The display unit may be integral to the power supply cable, and any one of claims 1 to 7, characterized in that provided in the viewable a position by the user when it becomes to the energized The building power supply system described in 1. The building has a configuration in which commercial power is supplied from a system power supply, and includes a switching unit that switches an electric path depending on which of the commercial power and the power supplied from the automobile is supplied to the electric device. And
The power supply path to the electrical equipment is changed to the path on the automobile side by switching the switching means, and the power supply cable is connected to the discharge terminal portion, and power is supplied from the automobile side to the building side. power supply system of a building according to any one of claims 1 to 8, characterized in that to perform.

Images