JP2011114913A - Dc receptacle device and dc power distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply proper DC power to a load apparatus. <P>SOLUTION: A control unit 14 determines whether power can be fed to the load apparatus 3 on the basis of information on the load apparatus which is acquired by a load apparatus information acquisition unit 12, closes a switch 11 when it is determined that the power can be fed, and maintains the switch 11 in an open state when it is determined that the power cannot be fed. By this arrangement, the load apparatus 3 is not always fed with the power merely by connecting a plug 30 of the load apparatus 3 into an insertion connection 10, and the control unit 14 closes the switch to feed power 11 only when it is determined that the power can be fed to the load apparatus 3 on the basis of the load apparatus information acquired by the load apparatus information acquisition unit 12, thus enabling proper DC power supply to the load apparatus 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a DC outlet device and a DC distribution system for distributing DC power in a building.

  Conventionally, as a distribution system that distributes power in buildings, an AC distribution system that distributes AC power supplied from the power system to an outlet through a power line has been mainstream, but in recent years it has been generated by solar cells, fuel cells, etc. A direct current distribution system that distributes direct current power to an outlet (direct current outlet) through a power line is becoming widespread (for example, see Patent Document 1).

  On the other hand, load devices (DC devices) to which DC power is supplied have different rated voltages such as 48 volts, 24 volts, and 12 volts for each type, and for example, 48 volts DC voltage is distributed. In order to prevent a load device having a rated voltage of 24 volts from being connected to a DC outlet, the plug on the load device side and the outlet of the DC outlet are formed in different shapes for each voltage level. .

JP 2002-101552 A

  However, even if the plugs on the load device side and the outlets of the DC outlets have different shapes for each voltage level as described above, for example, due to a construction error, a DC power outlet of 24 volts is accidentally changed to a 48-volt DC outlet. It is not possible to prevent incorrect connection when power is distributed. Also, if the rated current consumption of the load device is greater than the current value that can be supplied through the DC outlet, even if the DC outlet and the load device are connected in the correct combination, the current value that can be supplied from the DC outlet There is a possibility that a current exceeding the current flows.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a DC outlet device and a DC distribution system capable of supplying appropriate DC power to a load device.

  In order to achieve the above object, the invention according to claim 1 is an insertion connection portion into which a plug of a load device is inserted and connected so as to be freely inserted and removed, and an opening and closing portion that opens and closes the connection between the power distribution path and the insertion connection portion. A load device information acquisition unit that acquires information about the load device from a load device in which a plug is plugged and connected to the plug connection unit, and the load device based on the load device information acquired by the load device information acquisition unit Control that determines whether or not power can be supplied to the power supply, closes the opening / closing part when it is determined that power supply is possible, connects the distribution path and the plug-in connection part, and maintains the open / close part in the open state when it is determined that power supply is not possible And a section.

  According to the first aspect of the present invention, the load device is not supplied with power only when the plug of the load device is connected to the plug-in connection unit, and is connected to the load device based on the load device information acquired by the load device information acquisition unit. Only when it is determined that power can be supplied, the opening / closing part is closed and power is supplied, so that a DC outlet device capable of supplying appropriate DC power to the load device can be provided.

  The invention of claim 2 is the invention of claim 1, further comprising a DC power information acquisition unit that acquires information about DC power supplied through the distribution path, and the control unit acquires the load device information acquired by the load device information acquisition unit. And determining whether or not power supply to the load device is possible based on both the DC power information acquired by the DC power information acquisition unit.

  According to the second aspect of the present invention, it is possible to supply more appropriate DC power to the load device by determining whether or not to supply power to the load device based on both the load device information and the DC power information. it can.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the load device information acquisition unit acquires information on a rated voltage of the load device as the load device information.

  According to the invention of claim 3, it is possible to prevent the DC power having a voltage different from the rated voltage from being supplied to the load device by mistake.

  The invention of claim 4 is the invention of claim 3, further comprising a DC power information acquisition unit that acquires information on an allowable voltage range of DC power supplied through the distribution path, and the control unit is acquired by the load device information acquisition unit When the rated voltage of the load device is within the allowable voltage range acquired by the DC power information acquisition unit, it is determined that power supply to the load device is possible.

  According to the invention of claim 4, it is possible to prevent the DC power having a voltage different from the rated voltage from being supplied to the load device by mistake.

  The invention of claim 5 is characterized in that, in the invention of claim 1 or 2, the load device information acquisition unit acquires information of a rated current consumption of the load device as the load device information.

  According to the invention of claim 5, it is possible to prevent the current exceeding the supply capability from being supplied to the load device.

  A sixth aspect of the present invention is the invention according to the fifth aspect, further comprising a DC power information acquisition unit that acquires information on a maximum current value that can be supplied through the distribution path, and the control unit is a load device that is acquired by the load device information acquisition unit When the rated current consumption of the battery does not exceed the maximum current value acquired by the DC power information acquisition unit, it is determined that power can be supplied to the load device.

  According to invention of Claim 6, it can prevent supplying the electric current exceeding the maximum electric current value which can be supplied with respect to a load apparatus.

  The invention of claim 7 is the invention of claim 6, further comprising a display unit capable of displaying numbers, wherein the control unit displays the difference between the maximum current value and the rated current consumption value on the display unit. And

  According to the invention of claim 7, it is possible to grasp the power supply status from the numerical values displayed on the display unit.

  According to an eighth aspect of the present invention, in the seventh aspect of the invention, the control unit determines that power can be supplied to the load device if the maximum current value acquired by the DC power information acquisition unit increases and exceeds the rated current consumption. Features.

  According to the invention of claim 8, even when the power supply to the load device is not performed because the maximum current value is lower than the rated current consumption, for example, the maximum current value is increased by enhancing the power supply capability. If the rated current consumption increases and exceeds the rated current consumption, power can be supplied to the load equipment.

  The invention of claim 9 is the invention according to any one of claims 1 to 8, further comprising a threshold value setting unit for setting a threshold value, wherein the control unit is a voltage value of DC power supplied through the distribution line. The opening / closing part is opened when the value falls below the threshold value.

  According to the ninth aspect of the present invention, if the voltage value of the DC power supplied through the distribution path decreases for some reason and falls below the threshold value, the opening / closing part is opened and the power supply to the load device is stopped. Power consumption can be suppressed.

  In order to achieve the above object, a power supply device that supplies DC power, and one or more DC outlet devices that are installed in a building and that distribute DC power from the power supply device through a distribution path, are provided. In the DC power distribution system having the above, the DC outlet device includes a plug connection portion in which a plug included in a load device is plugged in and connected freely, and an opening / closing portion that opens and closes a connection between the distribution path and the plug connection portion. A load device information acquisition unit that acquires information on the rated voltage of the load device from a load device in which a plug is plugged into the plug connection unit, and a transmission unit that transmits the rated voltage information to the power feeding device through a distribution path, The DC power information acquisition unit that acquires information on the voltage value of the DC power supplied by the power supply device and the rated voltage of the load device that is acquired by the load device information acquisition unit match the voltage value that is acquired by the DC power information acquisition unit. A control unit that closes the opening and closing part to connect the distribution path and the plug-in connection part and maintains the opening and closing part in an opened state when the rated voltage and the voltage value do not match. Is characterized in that, based on the rated voltage information transmitted from the DC outlet device through the distribution path, the voltage value of the DC power supplied through the distribution path is matched with the rated voltage.

  According to the invention of claim 10, it is possible to provide a DC power distribution system capable of supplying appropriate DC power to the load device.

  In order to achieve the above object, the invention of claim 11 includes a power supply device that supplies DC power and a plurality of DC outlet devices that are installed in the building and from which the DC power is distributed through the distribution path. In a DC power distribution system, a DC outlet device includes a plug connection portion in which a plug of a load device is plugged in and connected freely, an open / close portion that opens and closes a connection between the distribution path and the plug connection portion, and a plug connection. A load device information acquisition unit that acquires information on the load device from a load device in which a plug is plugged into the unit, and whether or not to supply power to the load device based on the load device information acquired by the load device information acquisition unit A control unit that closes the opening and closing unit when connecting the power distribution path and the plug-in connection unit when determining that the power supply is possible, and maintaining the opening and closing unit in an open state when determining that the power supply is impossible But A power supply device that sends a control signal that instructs the DC outlet device having a low priority to stop power supply to the load device when the demand power exceeds the supply power. The control unit of the DC outlet device transmits the opening / closing unit when the priority set in the priority setting unit is equal to or lower than the priority instructed to stop power supply by the control signal. .

  According to the eleventh aspect of the present invention, when the demand power exceeds the supply power of the power supply device, the power supply to the load device is stopped by opening the opening / closing portion of the plurality of DC outlet devices having a low priority. A DC power distribution system capable of supplying appropriate DC power to the load device can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the DC outlet apparatus and DC distribution system which can supply suitable DC power with respect to load apparatus can be provided.

1 shows Embodiment 1, (a) is a system configuration diagram, (b) is a block diagram of a DC outlet device. FIG. 4 is a block diagram of a DC outlet device according to a second embodiment. FIG. 6 is a block diagram of a DC outlet device according to a third embodiment. FIG. 10 is a system configuration diagram of a DC power distribution system according to a fourth embodiment. FIG. 10 is a system configuration diagram of a DC power distribution system according to a fifth embodiment.

(Embodiment 1)
FIG. 1 (b) shows a block diagram of a first embodiment of a DC outlet device according to the present invention, and FIG. 1 (a) shows a system configuration diagram of a DC power distribution system including the DC outlet device 1 of the present embodiment.

  The DC power distribution system according to the present embodiment includes a power supply device 2 that supplies DC power as shown in FIG. 1A, and DC power is distributed from the power supply device 2 that is installed in the building through a power distribution path (power supply line) Lp. 1 to a plurality of (three in the illustrated example) DC outlet devices 1.

  For example, each of the power feeding devices 2 is configured such that DC power obtained by converting AC power supplied from an electric power system by an AC / DC converter, or DC power generated by a private power generation facility such as a solar cell or a fuel cell, is supplied through a power supply line Lp. Power is supplied to the DC outlet device 1.

  As shown in FIG. 1 (b), the DC outlet device 1 includes a plug connection portion 10 into which a plug 30 of the load device 3 is inserted and connected in a freely insertable manner, and a normally open type latching relay. An open / close unit 11 that opens and closes the connection between the plug connection unit 10 and the load device information acquisition unit that acquires information about the load device 3 from the load device 3 in which the plug 3 is plugged into the plug connection unit 10 12, DC power information acquisition unit 13 that acquires information about DC power supplied through the feeder Lp, load device information acquired by the load device information acquisition unit 12 and DC power information acquired by the DC power information acquisition unit 13 The power supply to the load device 3 is determined based on the power supply, and when it is determined that power supply is possible, the opening / closing part 11 is closed to connect the power supply line Lp and the plug-in connection part 10, and when power supply is determined to be impossible Open and close And a control unit 14 to maintain the 11 open state.

  The load device information acquisition unit 12 acquires rated voltage value information as load device information from the load device 3 when the plug 30 is plugged into the plug connection unit 10. Here, in the load device 3, a resistor (not shown) having a resistance value corresponding to its own rated voltage among several types of rated voltages (48 volts, 24 volts, 12 volts, etc.) is connected to the plug 30. The load device information acquisition unit 12 acquires the rated voltage value (load device information) of the load device 3 based on the voltage drop when a minute current is passed through the plug 30 via the plug-in connection unit 10. . However, the method by which the load device information acquisition unit 12 acquires the load device information from the load device 3 is not limited to this. For example, when the plug 30 is plugged into the plug-in connection unit 10, a minimum power supply is performed to activate only the communication function of the load device 3, and the communication function of the load device information acquisition unit 12 and the load device 3 are activated. The load device information may be acquired using the communication function.

  On the other hand, the DC power information acquisition unit 13 acquires DC power information (DC voltage) by measuring the DC voltage applied to the power supply line Lp. However, the method by which the DC power information acquisition unit 13 acquires DC power information (DC voltage applied to the power supply line Lp) is not limited to this. For example, the power supply line Lp with the power supply device 2 is not limited thereto. The DC power information may be acquired from the power feeding device 2 by performing data communication via the.

  The control unit 14 includes a microcomputer as a main component, and executes a process for determining whether power can be supplied to the load device 3 and an opening / closing control process for the opening / closing unit 11.

  When the plug of the load device 3 is plugged and connected to the plug connection portion 10 of the DC outlet device 1 configured as described above, the DC outlet device 1 operates as follows. First, the load device information (rated voltage value) of the load device 3 in which the plug 30 is connected to the plug-in connection unit 10 is acquired by the load device information acquisition unit 12, and the acquired load device information is passed to the control unit 14. The control unit 14 determines whether the load device information (rated voltage value) acquired by the load device information acquisition unit 12 is within an allowable voltage range determined from the DC power information (DC voltage) acquired by the DC power information acquisition unit 13. The determination process is executed. Here, the allowable voltage range is, for example, a range of ± several% with respect to the DC voltage acquired by the DC power information acquisition unit 13.

  If the control unit 14 determines that the rated voltage value falls within the allowable voltage range, the control unit 14 closes the opening / closing unit 11 to connect the power supply path Lp and the plug-in connection unit 10 to supply DC power to the load device 3. (Power is supplied). However, if it is determined that the rated voltage value does not fall within the allowable voltage range, the control unit 14 maintains the open / close unit 11 in a closed state and does not supply DC power to the load device 3 (does not supply power). Therefore, even when a load device 3 having a rated voltage higher or lower than the voltage value of the DC power supplied from the power supply device 2 is erroneously connected to the DC outlet device 1, the erroneously connected load device 3 is connected to the load device 3. On the other hand, a DC voltage higher or lower than the rated voltage is not applied, and appropriate DC power can be supplied to the load device.

  In the control unit 14 of the DC outlet device 1 of the present embodiment, the load device information (rated voltage value) acquired by the load device information acquisition unit 12 and the DC power information (DC voltage) acquired by the DC power information acquisition unit 13. For example, if the voltage of the DC power supplied from the power supply device 2 through the power supply line Lp is known in advance, the load device information acquisition unit 12 determines whether or not power supply to the load device 3 is possible. Whether to supply power to the load device 3 may be determined based only on the load device information (rated voltage value) to be acquired.

  Further, the load device information is not limited to the rated voltage value of the load device 3. For example, the load device information acquisition unit 12 may acquire the rated current consumption value of the load device 3 as the load device information. Similarly, the DC power information is not limited to the DC voltage, and the DC power information acquisition unit 13 may acquire the maximum current value that can be supplied from the power supply apparatus 2 as the DC power information. Then, the control unit 14 of the DC outlet device 1 determines that the power can be supplied if the rated current consumption of the load device 3 does not exceed the maximum current value, and closes the opening / closing unit 11, so that the rated current consumption value of the load device 3 is If it exceeds the maximum current value, it is determined that power supply is not possible, and the opening / closing part 11 is maintained in a closed state, thereby preventing a current exceeding the maximum current value that can be supplied to the load device 3 from being supplied. Is. Even in this case, if the maximum current value of the DC power supplied from the power supply device 2 through the power supply line Lp is known in advance, only the load device information (rated current consumption value) acquired by the load device information acquisition unit 12 is obtained. Whether or not power supply to the load device 3 can be determined may be determined based on the above.

(Embodiment 2)
A block diagram of the DC outlet device 1 of the present embodiment is shown in FIG. However, since the DC outlet device 1 of the present embodiment has a common configuration except that the display unit 15 is added to the DC outlet device 1 of the first embodiment, the same components are the same. The reference numerals are attached and the description is omitted.

  The display unit 15 includes a display element (for example, a 7-segment LCD) that can display numerical values (Arabic numerals). Note that the load device information acquisition unit 12 of the DC outlet device 1 of the present embodiment acquires the rated current consumption value of the load device 3 as load device information, and the DC power information acquisition unit 13 is the maximum current that can be supplied from the power supply device 2. The value is acquired as DC power information.

  When the plug of the load device 3 is plugged into the plug-in connection unit 10, the load device information acquisition unit 12 acquires the load device information (rated current consumption value) of the load device 3 and controls the acquired load device information. Pass to part 14. The control unit 14 determines whether or not the load device information (rated current consumption value) acquired by the load device information acquisition unit 12 exceeds the DC power information (maximum current value) acquired by the DC power information acquisition unit 13. Execute the process. If the rated current consumption value does not exceed the maximum current value, the control unit 14 closes the opening / closing unit 11 and connects the power supply path Lp and the plug-in connection unit 10 to supply DC power to the load device 3 (power supply). To do). On the other hand, if the rated current consumption value exceeds the maximum current value, the control unit 14 maintains the opening / closing unit 11 in a closed state and does not supply DC power to the load device 3 (does not supply power). Further, the control unit 14 calculates a value (current margin value) obtained by subtracting the rated current consumption value from the maximum current value, and causes the display unit 15 to display the calculated current margin value. For example, if the maximum current value is 1 ampere and the rated current consumption value is 400 milliamperes, the display unit 15 displays a numerical value of 600 milliamperes as the current margin value. Therefore, it is possible to inform the user that the DC outlet device 1 can supply power simultaneously to the load device 3 having a rated current consumption value of less than 600 milliamperes.

  On the other hand, for example, when the maximum current value is 1 ampere and the rated current consumption value is 1.2 amperes, the opening / closing unit 11 is maintained in the open state and is not supplied with power to the load device 3, and the display unit 15 has a current shortage value of 200. The number of milliamps is displayed. At this time, the maximum current value that can be supplied through the feeder line Lp by replacing the power supply device 2 with a maximum current value of 1.2 amperes or more, or by adding another power supply device with a maximum current value of 200 milliamperes or more. Since the maximum current value acquired by the DC power information acquisition unit 13 also increases, the control unit 14 determines that the increased maximum current value exceeds the rated current consumption value, and closes the opening / closing unit 11. Thus, power supply to the load device 3 can be started.

(Embodiment 3)
A block diagram of the DC outlet device 1 of the present embodiment is shown in FIG. However, since the DC outlet device 1 of the present embodiment has a common configuration except that the threshold value setting unit 16 is added to the DC outlet device 1 of the first embodiment, Are denoted by the same reference numerals and description thereof is omitted.

  The threshold value setting unit 16 selects and sets one of a plurality of threshold values using a dip switch, for example. Here, the threshold value set by the threshold value setting unit 16 is compared with the voltage value of the DC power supplied to the DC outlet device 1 through the feeder line Lp, and the voltage value is the threshold value. The control unit 14 opens the opening / closing unit 11 and stops the power supply to the load device 3 when the value falls below.

  That is, as the distance (wiring length) from the power supply device 2 increases, the voltage value of the DC power supplied to the DC outlet device 1 decreases, and if the voltage value falls below the rated voltage value of the load device 3, Since sufficient DC power cannot be supplied, the control unit 14 opens the opening / closing unit 11 when the voltage value of the DC power falls below a threshold value set to about the lowest voltage at which the load device 3 can operate. By stopping the power supply to the load device 3, unnecessary power consumption in the load device 3 can be suppressed.

(Embodiment 4)
An embodiment of a DC power distribution system according to the present invention will be described in detail with reference to the system configuration diagram of FIG. However, since the configuration of the DC outlet device 1 in the present embodiment is almost the same as that of the DC outlet device 1 of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  The power supply device 2 in this embodiment includes a power supply unit 20 that supplies DC power through a power supply line Lp, a transmission unit 21 that performs data transmission with the DC outlet device 1 using the power supply line Lp as a transmission path, and a power supply unit. 20 and a control unit 22 for controlling the transmission unit 21. The power feeding unit 20 is configured by an AC / DC converter or the like whose output voltage is variable, and feeds DC power having a voltage value instructed by the control unit 22 through the power feeding line Lp. The transmission unit 21 superimposes a transmission signal for transmitting data using a high-frequency carrier wave on a DC voltage applied to the feeder line Lp. This technique is similar to a power line carrier technique in which a communication signal is superimposed on an AC voltage in a power line that supplies AC power. The control unit 22 includes a microcomputer as a main component, controls the transmission unit 21 to transmit data to and from the DC outlet device 1, and supplies power based on data transmitted from the DC outlet device 1 as will be described later. The unit 20 is controlled.

  On the other hand, the DC outlet device 1 according to the present embodiment includes a transmission unit 21 of the power feeding device 2 in addition to the plug connection unit 10, the opening / closing unit 11, the load device information acquisition unit 12, the DC power information acquisition unit 13, and the control unit 14. The transmission part 17 which performs data transmission between these is provided. Similar to the transmission unit 21 of the power supply device 2, the transmission unit 17 superimposes a transmission signal for transmitting data using a high-frequency carrier wave on a DC voltage applied to the power supply line Lp. Note that a unique address is assigned to each of the DC outlet device 1 and the power feeding device 2, and by specifying the addresses, the DC outlet device 1 and the power feeding device 2 identify each other and transmit data one to one. be able to.

  Next, the operation of this embodiment will be described. First, when the plug 30 of the load device 3 is connected to the plug-in connection unit 10 of the DC outlet device 1, the load device information acquisition unit 12 acquires and acquires the load device information (rated voltage value) of the load device 3. The load device information is passed to the control unit 14. The control unit 14 of the DC outlet device 1 transmits (transmits) a transmission signal for notifying the load device information (rated voltage value) acquired by the load device information acquisition unit 12 from the transmission unit 17 to the power supply device 2. .

  In the power supply device 2, when the transmission unit 21 receives a transmission signal transmitted (transmitted) from the DC outlet device 1 via the power supply line Lp, the control unit 22 acquires the load device information (rated voltage value) of the load device 3. To do. For example, if the rated voltage value is 24 volts, the control unit 22 of the power supply device 2 matches the rated voltage value notified from the DC outlet device 1 with the voltage value of the DC power supplied by the power supply unit 20. The power feeding unit 20 is controlled so that the output voltage is 24 volts.

  Information on the voltage value of the DC power supplied from the power supply device 2 is acquired by the DC power information acquisition unit 13 of the DC outlet device 1 and passed to the control unit 14. When the control unit 14 of the DC outlet device 1 confirms that the voltage value of the DC power matches the rated voltage value, the control unit 14 closes the opening / closing unit 11 and connects the feeding path Lp and the plug-in connection unit 10. Then, DC power is supplied to the load device 3.

  Thus, in the DC power distribution system of the present embodiment, since the power supply device 2 adjusts the output voltage so as to match the rated voltage value of the load device 3, appropriate DC power is supplied to the load device 3. It is possible.

(Embodiment 5)
Another embodiment of the DC power distribution system according to the present invention will be described in detail with reference to the system configuration diagram of FIG. However, since the configurations of the DC outlet device 1 and the power feeding device 2 in this embodiment are almost the same as those of the DC outlet device 1 and the power feeding device 2 in the fourth embodiment, the same components are denoted by the same reference numerals. A description thereof will be omitted.

  In addition to the plug-in connection unit 10, the switching unit 11, the load device information acquisition unit 12, the DC power information acquisition unit 13, the control unit 14, and the transmission unit 17, the DC outlet device 1 in this embodiment includes a priority order setting unit 18. It has. The priority order setting unit 18 selects and sets one of a plurality of priority orders using, for example, a dip switch. Here, the priority order set by the priority order setting unit 18 indicates the order in which power supply to the load device 3 is stopped by an instruction from the power supply device 2, and the DC outlet device in which a low priority is set. The power supply to the load device 3 is stopped first.

  In the power supply device 2 in the present embodiment, DC power generated by a solar cell (not shown) is converted to a desired voltage level by the power supply unit 20 and stabilized, and then supplied through the power supply line Lp.

  Next, the operation of this embodiment will be described. When power is supplied to the load device 3 from each of the plurality of DC outlet devices 1, the amount of power generated by the solar cell is reduced due to bad weather, and the power supplied to the power supply device 2 is the total value of the demand power of all the load devices 3. If it falls below, the control unit 22 of the power supply apparatus 2 first designates the lowest priority (for example, the third priority when the priority is first, second, and third) and stops power supply. A transmission signal including a control command instructing to be transmitted is transmitted from the transmission unit 21 to each DC outlet device 1.

  In the plurality of DC outlet devices 1 connected to the power supply line Lp, a transmission signal transmitted from the power supply device 2 via the power supply line Lp is received by the transmission unit 17, and a control command included in the transmission signal is transmitted to the control unit. 14 receives. In the control unit 14, if the priority specified in the control command is higher than its own priority set in the priority setting unit 18, the control command is discarded and nothing is performed. If the priority order is lower than the self priority order, the switching unit 11 is opened to stop the power supply to the load device 3. For example, when the priority specified in the control command is “2nd”, the DC outlet device 1 whose own priority is 2nd or lower, that is, the 2nd or 3rd priority is set. The unit 11 is opened and the power supply to the load device 3 is stopped.

  As described above, according to the DC power distribution system of the present embodiment, when the demand power exceeds the supply power of the power feeding device 2, the load 11 is opened by opening the opening / closing unit 11 of the plurality of DC outlet devices 1 having a lower priority. Since power supply to the device 3 is stopped, appropriate DC power can be supplied to the load device 3. However, in the present embodiment, the priority order is set in the DC outlet device 1, but the priority order of the plurality of DC outlet devices 1 may be set in the power feeding device 2.

DESCRIPTION OF SYMBOLS 1 DC outlet device 10 Plug-in connection part 11 Opening / closing part 12 Load information acquisition part 14 Control part Lp Feeding line (distribution line)

Claims (11)

  A plug of the load device is inserted and connected so that the plug can be inserted and removed freely, an opening and closing part for opening and closing the connection between the power distribution path and the plug connection, and the plug is connected to the plug connection. A load device information acquisition unit that acquires information about the load device from the load device, and whether or not power supply to the load device is determined based on the load device information acquired by the load device information acquisition unit. A DC outlet device comprising: a controller that closes the opening / closing part to connect the distribution path and the plug-in connection part, and that maintains the opening / closing part in an open state when it is determined that power feeding is impossible.   A DC power information acquisition unit that acquires information on DC power supplied through the distribution path is provided, and the control unit is configured to obtain both load device information acquired by the load device information acquisition unit and DC power information acquired by the DC power information acquisition unit. 2. The DC outlet device according to claim 1, wherein whether or not power can be supplied to the load device is determined based on the above.   The DC outlet device according to claim 1 or 2, wherein the load device information acquisition unit acquires information on a rated voltage of the load device as the load device information.   A DC power information acquisition unit that acquires information on the allowable voltage range of DC power supplied through the distribution path is provided, and the control unit acquires the rated voltage of the load device acquired by the load device information acquisition unit by the DC power information acquisition unit. 4. The DC outlet device according to claim 3, wherein it is determined that power supply to the load device is possible when it is within an allowable voltage range.   The DC outlet device according to claim 1 or 2, wherein the load device information acquisition unit acquires information on a rated current consumption of the load device as the load device information.   It has a DC power information acquisition unit that acquires information on the maximum current value that can be supplied through the distribution path, and the control unit obtains the maximum rated current consumption of the load device acquired by the load device information acquisition unit by the DC power information acquisition unit. 6. The DC outlet device according to claim 5, wherein when the current value is not exceeded, it is determined that the power can be supplied to the load device.   7. The DC outlet device according to claim 6, further comprising a display unit capable of displaying numbers, wherein the control unit displays a difference between the maximum current value and the rated current consumption value on the display unit.   8. The DC outlet device according to claim 7, wherein the control unit determines that power can be supplied to the load device when the maximum current value acquired by the DC power information acquisition unit increases and exceeds the rated current consumption.   A threshold value setting unit for setting a threshold value is provided, and the control unit opens the opening / closing unit when the voltage value of the DC power supplied through the distribution path falls below the threshold value. Item 9. The DC outlet device according to any one of Items 1 to 8. In a DC power distribution system having a power supply device that supplies DC power and one or more DC outlet devices that are installed in a building and distribute DC power from the power supply device through a distribution path,
A DC outlet device has a plug connection part in which a plug of a load device is plugged in and connected freely, an open / close part that opens and closes the connection between the power distribution path and the plug connection part, and a plug inserted into the plug connection part. A load device information acquisition unit that acquires information on the rated voltage of the load device from a load device that is connected, a transmission unit that transmits the rated voltage information to the power supply device through a distribution path, and a DC power supplied by the power supply device The DC power information acquisition unit that acquires the voltage value information of the load device and the opening / closing unit are closed when the rated voltage of the load device acquired by the load device information acquisition unit matches the voltage value acquired by the DC power information acquisition unit. And connecting the power distribution path and the plug-in connection part, and having a control part for maintaining the open / close part in an open state when the rated voltage and the voltage value do not match,
The power feeding device matches a voltage value of DC power supplied through the distribution path with the rated voltage based on rated voltage information transmitted from the DC outlet device through the distribution path. In a DC power distribution system having a power supply device that supplies DC power and a plurality of DC outlet devices that are installed in a building and distribute DC power from the power supply device through a distribution path,
A DC outlet device has a plug connection part in which a plug of a load device is plugged in and connected freely, an open / close part that opens and closes the connection between the power distribution path and the plug connection part, and a plug inserted into the plug connection part. The load device information acquisition unit that acquires information about the load device from the connected load device and the load device information acquired by the load device information acquisition unit determines whether or not power can be supplied to the load device. The control unit that closes the opening and closing unit to connect the distribution path and the plug-in connection unit when it is determined to be, and maintains the opening and closing unit in the open state when it is determined that power supply is not possible, and the priority that is set in the priority order A ranking setting unit,
When the power demand exceeds the power supply, the power supply device transmits a control signal instructing to stop power supply to the load device to the DC outlet device having a low priority through the distribution line.
The control unit of the DC outlet device opens the opening / closing unit when the priority set in the priority setting unit is equal to or lower than the priority given by the control signal to stop power supply. .

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