JP2009142012A - Direct-current power distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a direct-current power distribution system for suppressing current consumption from exceeding an upper limit value at each branch circuit. <P>SOLUTION: The direct-current power distribution system includes: a direct-current breaker 114 connected to direct-current power feeding lines Wdc; direct-current outlets 1 respectively connected to the direct-current power feeding lines Wdc on the secondary side of the direct-current breaker 114; a current sensor 40 for measuring the amount of current flowing to the secondary side of the direct-current breaker 114; and a transmission processing unit 30 that superimposes the amount of current measured by the current sensor 40 on direct-current voltage and transmits it to the direct-current outlets 1. Each of the direct-current outlets 1 includes: a communication circuit 4 that receives the measurement value of the amount of current transmitted from the transmission processing unit 30; multiple light-emitting diodes 6a to 6d; and a display control circuit 5 that causes a corresponding light-emitting diode 6a to 6d to emit light based on the measured amount of current received by the communication circuit 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a DC power distribution system.

  2. Description of the Related Art Conventionally, an AC outlet is provided in which a plug of a load device is detachably connected, and operating power is supplied to the load device via the plug (see, for example, Patent Document 1).

Recently, the introduction of fuel cells and solar power generation equipment to homes is progressing, and in such homes, direct current power generated by fuel cells and solar power generation equipment is transferred to each room via branch breakers. The introduction of a DC power distribution system in which a DC device that supplies DC power to an installed DC outlet and operates by receiving DC power is connected is being studied.
JP-A-5-207626

  In the DC distribution system described above, the amount of current used in the branch circuit by changing or increasing the number of DC devices connected to a plurality of DC outlets provided in each branch circuit, or by increasing the current consumption in each DC device. May exceed the upper limit (the rated current of the branch breaker), but the user must know all the DC devices connected to each DC outlet and whether the DC devices are operating or stopped. Since it is difficult to take measures such as stopping the use of DC devices, the amount of current used sometimes exceeds the upper limit.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a DC power distribution system in which the amount of current used is suppressed from exceeding the upper limit value in each branch circuit.

  In order to achieve the above object, the invention of claim 1 includes a circuit breaker connected to a DC power supply line from a DC power supply, and a DC outlet connected to a DC power supply line on the secondary side of the circuit breaker, respectively. A DC power distribution system comprising: a current amount measuring unit that measures the amount of current flowing through the secondary side of the circuit breaker; and a DC outlet that superimposes the measured current amount measured by the current amount measuring unit on a DC voltage. A transmission processing unit for transmitting to the DC power outlet, receiving means for receiving the current amount measurement value transmitted from the transmission processing unit at the DC outlet, and current amount display means for displaying the current amount measurement value received by the receiving means, Is provided.

  The invention of claim 2 is a circuit breaker connected to a DC power supply line from a DC power supply, a plurality of DC outlets respectively connected to a DC power supply line on the secondary side of the circuit breaker, and two circuit breakers. When the amount of current measured by the current amount measurement unit that measures the amount of current flowing to the next side, the priority order setting unit that sets the priority order of each DC outlet, and the current amount measurement value by the current amount measurement unit exceeds a predetermined upper limit value, A power supply cutoff unit that cuts off power supply to the DC device is provided in order from a DC outlet having a low priority.

  According to a third aspect of the present invention, in the second aspect of the present invention, the power supply interrupting unit is configured to transfer the DC power from each DC outlet to the DC device according to the priority order until the current amount measured by the current amount measuring unit is equal to or lower than a predetermined upper limit value. It is characterized by continuing to cut off the power supply.

  According to a fourth aspect of the present invention, in the second or third aspect of the present invention, when the current amount measured by the current amount measuring unit exceeds a predetermined upper limit value, the power cut-off signal is sent in order from a DC outlet having a lower priority. A power supply cutoff unit is configured by a transmission processing unit that transmits a DC voltage superimposed thereon and a cutoff unit that is provided in each DC outlet and that cuts off the power supply to the DC device when a power supply cutoff signal is received. .

  According to the invention of claim 1, when the current amount measurement value measured by the current amount measurement unit is transmitted from the transmission processing unit to each DC outlet, the receiving means of each DC outlet receives the current amount measurement value, Since the current amount is displayed on the current amount display means, the current measured current amount can be grasped based on the display on the current amount display means. Therefore, it is possible to take measures such as refraining from using the DC device on the user side so that the current amount does not exceed the upper limit value, and there is an effect that it is possible to suppress the use current amount from exceeding the upper limit value. In addition, since the transmission processing unit transmits the current amount measurement value superimposed on the DC voltage and can transmit the current amount measurement value using the DC power supply line, the transmission processor separately transmits the current amount measurement value. There is also an advantage that it is not necessary to prepare a signal line.

  According to the invention of claim 2, when the current amount measurement value measured by the current amount measurement unit exceeds the upper limit value, the power supply interruption unit has a low priority according to the priority set by the priority setting means. Since the power supply to the DC equipment is shut off in order from the DC outlet, the amount of current used can be prevented from exceeding the upper limit value, and the DC outlet with a high priority should be connected to the DC equipment. Power supply can be continued.

  According to the invention of claim 3, since the power cut-off unit continues to cut off the power supply from the DC outlets to the DC devices in accordance with the priority order until the current amount becomes equal to or lower than the upper limit value. It is possible to reliably prevent the upper limit from being exceeded.

  According to the invention of claim 4, when the receiving means of each DC outlet receives the power cut-off signal transmitted from the transmission processing unit, the cut-off means cuts off the power supply to the DC device based on the power cut-off signal. Therefore, similarly to the invention of claim 2 or 3, it is possible to prevent the amount of current used from exceeding the upper limit value.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
Embodiment 1 of this invention is demonstrated based on FIGS. 1-7 and FIG. Before describing the characteristic part of this embodiment, first, the overall configuration of the DC power distribution system according to the present invention will be described with reference to FIG. In addition, although the house of a detached house is assumed in FIG. 11 as a building to which this invention is applied, it does not prevent applying the technical idea of this invention to an apartment house. As shown in FIG. 11, the house H is provided with a DC power supply unit 101 that outputs DC power and a DC device 102 as a load driven by the DC power, and an output end of the DC power supply unit 101. DC power is supplied to the DC device 102 through the DC power supply line Wdc connected to the. A current flowing through the DC power supply line Wdc is monitored between the DC power supply unit 101 and the DC device 102, and when an abnormality is detected, power is supplied from the DC power supply unit 101 to the DC device 102 on the DC power supply line Wdc. A DC breaker 114 is provided for limiting or blocking the current.

  The DC power supply line Wdc is used as a DC power supply path and also as a communication path, and is connected to the DC power supply line Wdc by superimposing a communication signal for transmitting data on a DC voltage using a high-frequency carrier wave. Enables communication between devices. 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 DC power supply line Wdc is connected to the home server 116 via the DC power supply unit 101. The in-home server 116 is a main device for constructing a home communication network (hereinafter referred to as “home network”), and communicates with a subsystem constructed by the DC device 102 in the home network.

  In the example shown in the drawing, as an subsystem, an illumination system comprising an information equipment system K101 comprising an information-system DC device 102 such as a personal computer, a wireless access point, a router, and an IP telephone, and an illumination system DC equipment 102 such as a lighting fixture. K102, K105, a door number system K103 including a DC device 102 for handling visitors and monitoring intruders, and a residential alarm system K104 including a DC device 102 of an alarm system such as a fire detector. Each subsystem constitutes a self-supporting distributed system, and can operate even with the subsystem alone.

  The DC breaker 114 described above is provided in association with a subsystem. In the illustrated example, four DC circuit breakers 114 are associated with the information equipment system K101, the lighting system K102 and the door number system K103, the house alarm system K104, and the lighting system K105. A DC breaker 114 is provided. When a plurality of subsystems are associated with one DC breaker 114, a connection box 121 that divides the system of the DC power supply line Wdc is provided for each subsystem. In the illustrated example, a connection box 121 is provided between the illumination system K102 and the door number system K103.

  As the information equipment system K101, there is provided an information equipment system K101 composed of the DC equipment 102 connected to the DC outlet 1 arranged in advance in the house H (constructed during construction of the house H) in the form of a wall outlet or a floor outlet.

  The lighting systems K102 and K105 include a lighting system K102 composed of a lighting device (DC device 102) arranged in advance in the house H and a lighting device (DC device 102) connected to a hook ceiling 132 arranged in advance on the ceiling. An illumination system K105 is provided. At the time of interior construction of the house H, the contractor attaches the lighting fixture to the hook ceiling 132, or the householder himself attaches the lighting fixture.

  In addition to using an infrared remote control device, a control instruction for the lighting apparatus that is the DC device 102 constituting the lighting system K102 can be given using a communication signal from the switch 141 connected to the DC power supply line Wdc. That is, the switch 141 has a communication function together with the DC device 102. In addition, a control instruction may be given by a communication signal from another DC device 102 in the home network or the home server 116 regardless of the operation of the switch 141. The instructions to the lighting fixture include lighting, extinguishing, dimming, and blinking lighting.

  Arbitrary DC devices 102 can be connected to the DC outlet 1 and the hooking ceiling 132 described above, and DC power is output to the connected DC devices 102. Therefore, the DC outlet 1 and the hooking ceiling 132 are distinguished below. When it is not necessary, it is called “DC outlet”.

  In these DC outlets, a plug-in connection port into which a contact directly provided in the DC device 102 is inserted opens in the body, and a contact receiver that directly contacts the contact inserted in the connection port is provided in the body. It has a retained structure. In other words, the DC outlet supplies power in a contact manner. When the DC device 102 connected to the DC outlet has a communication function, a communication signal can be transmitted through the DC power supply line Wdc. A communication function is provided not only in the DC device 102 but also in the DC outlet.

  The home server 116 not only is connected to the home network, but also has a connection port connected to the wide area network NT that constructs the Internet. When the in-home server 116 is connected to the wide area network NT, it is possible to receive services from the center server 200 that is a computer server connected to the wide area network NT.

  The service provided by the center server 200 includes a service that enables monitoring and control of equipment (including mainly the DC equipment 102 but also other equipment having a communication function) connected to the home network through the wide area network NT. is there. This service makes it possible to monitor and control devices connected to the home network using a communication terminal (not shown) having a browser function such as a personal computer, Internet TV, or mobile phone.

  The in-home server 116 has both functions of communication with the center server 200 connected to the wide area network NT and communication with equipment connected to the home network, and identification information about equipment in the home network ( Here, it is assumed that an IP address is used).

  The home server 116 enables monitoring and control of home devices through the center server 200 from a communication terminal connected to the wide area network NT by using a communication function with the center server 200. The center server 200 mediates between home devices and communication terminals on the wide area network NT.

  When monitoring and controlling home devices from a communication terminal, monitoring and control requests are stored in the center server 200, and the home device periodically performs one-way polling communication to monitor from the communication terminal. And receive control requests. With this operation, it is possible to monitor and control devices in the house from the communication terminal.

  Further, when an event that should be notified to the communication terminal, such as a fire detection, occurs in the home device, the home device notifies the center server 200, and the center server 200 notifies the communication terminal by e-mail.

  An important function among the communication functions with the home network in the home server 116 is the detection and management of devices constituting the home network. The home server 116 automatically detects devices connected to the home network by applying UPnP (Universal Plug and Play). The home server 116 includes a display device 117 having a browser function, and displays a list of detected devices on the display device 117. The display device 117 has a configuration with a touch panel type or an operation unit, and can perform an operation of selecting desired contents from options displayed on the screen of the display device 117. Therefore, the user (contractor or householder) of the home server 116 can monitor or control the device on the screen of the display device 117. The display device 117 may be provided separately from the home server 116.

  The in-home server 116 manages information related to device connection, and grasps the type, function, and address of the device connected to the home network. Accordingly, the devices in the home network can be operated in conjunction with each other. Information on the connection of the device is automatically detected as described above. In order to operate the device in an interlocking manner, the device itself is automatically associated with the attribute held by the device itself, and the home server 116 is configured as a personal computer. It is also possible to connect various information terminals and use the browser function of the information terminals to associate devices.

  Each device holds the relationship of the interlocking operation of the devices. Therefore, the device can operate in an interlocked manner without passing through the home server 116. By associating the linked operations for each device, for example, by operating a switch that is a device, it is possible to turn on or off the lighting fixture that is the device. In many cases, the association of the interlocking operations is performed within the subsystem, but the association beyond the subsystem is also possible.

  By the way, the DC power supply unit 101 basically generates DC power by power conversion of an AC power supply AC supplied from outside the house like a commercial power supply. In the configuration shown in the figure, the AC power source AC is input to an AC / DC converter 112 including a switching power source through a main circuit breaker 111 attached to the distribution board 110 as an internal unit. The DC power output from the AC / DC converter 112 is connected to each DC breaker 114 through the cooperative control unit 113.

  The DC power supply unit 101 is provided with a secondary battery 162 in preparation for a period in which power is not supplied from the AC power supply AC (for example, a power failure period of the commercial power supply AC). It is also possible to use a solar cell 161 or a fuel cell 163 that generates DC power. The solar battery 161, the secondary battery 162, and the fuel battery 163 are distributed power supplies with respect to the main power supply including the AC / DC converter 112 that generates DC power from the AC power supply AC. In the illustrated example, the solar cell 161, the secondary battery 162, and the fuel cell 163 include a circuit unit that controls the output voltage, and the secondary battery 162 includes a circuit unit that controls charging as well as discharging.

  Of the distributed power sources, the solar cell 161 and the fuel cell 163 are not necessarily provided, but the secondary battery 162 is preferably provided. The secondary battery 162 is charged in a timely manner by a main power source or other distributed power source, and the secondary battery 162 is discharged not only in a period in which power is not supplied from the AC power source AC but also in a timely manner as necessary. The cooperation control unit 113 performs charge / discharge of the secondary battery 162 and cooperation between the main power source and the distributed power source. That is, the cooperative control unit 113 functions as a DC power control unit that controls the distribution of power from the main power supply and the distributed power supply constituting the DC power supply unit 101 to the DC devices 102. Note that a configuration may be adopted in which the outputs of the solar cell 161, the secondary battery 162, and the fuel cell 163 are converted into AC power and used as input power of the AC / DC converter 112.

  Since the driving voltage of the DC device 102 is selected from a plurality of types of voltages depending on the device, the cooperative control unit 113 is provided with a DC / DC converter to convert the DC voltage obtained from the main power source and the distributed power source into the necessary voltage. Is desirable. Normally, one type of voltage is supplied to one subsystem (or DC device 102 connected to one DC breaker 114), but three or more wires are used for one subsystem. A plurality of types of voltages may be supplied. Alternatively, it is also possible to adopt a configuration in which the DC power supply line Wdc is a two-wire type and the voltage applied between the lines is changed with time. The DC / DC converter may be provided in a plurality of dispersed manners like the DC breaker.

  In the above configuration example, only one AC / DC converter 112 is illustrated, but a plurality of AC / DC converters 112 can be arranged in parallel, and when a plurality of AC / DC converters 112 are provided. It is desirable to increase or decrease the number of AC / DC converters 112 that are operated according to the magnitude of the load.

  The AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, the solar cell 161, the secondary battery 162, and the fuel cell 163 described above are provided with a communication function, and include a main power source, a distributed power source, and a DC device 102. It is possible to perform cooperative operations that deal with the load status. The communication signal used for this communication is transmitted in the form of being superimposed on the DC voltage in the same manner as the communication signal used for the DC device 102.

  In the above example, the AC / DC converter 112 is arranged in the distribution board 110 in order to convert the AC power output from the main breaker 111 into DC power by the AC / DC converter 112. On the output side, a branch breaker (not shown) provided in the distribution board 110 branches the AC supply line into a plurality of systems, and an AC / DC converter is provided on the AC supply line of each system to convert it into DC power for each system. You may employ | adopt the structure to do.

  In this case, since the DC supply unit can be provided for each floor or room of the house H, the DC supply unit can be managed for each system, and the direct current to the DC device 102 using DC power can be managed. Since the distance of the feed line Wdc is reduced, power loss due to a voltage drop in the DC feed line Wdc can be reduced. Also, the main breaker 111 and the branch breaker are housed in the distribution board 110, and the AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, and the home server 116 are housed in a separate board from the distribution board 110. Also good.

  Next, features of the present invention will be described with reference to FIGS. The DC power distribution system of the present invention includes a DC breaker 114 (circuit breaker) connected to a DC power supply line Wdc from a DC power supply unit 101 (DC power supply), and a DC power supply line Wdc on the secondary side of the DC breaker 114. A DC outlet 1 connected to each of them, and a current sensor 40 (current amount measuring unit) for measuring the amount of current flowing on the secondary side of the DC breaker 114, and a current amount measurement value measured by the current sensor 40 as a direct current A transmission processing unit 30 that superimposes the voltage on the voltage and transmits the voltage to a plurality of DC outlets 1 connected to the same DC breaker 114;

  The DC outlet 1 is connected to a plug 102 a of a DC device 102 that operates by receiving supply of DC power, and supplies DC power to the connected DC device 102. The input terminal portion 2 to which the DC power supply line Wdc is connected and the plug 102a of the DC device 102 are detachably connected, and the DC power input to the input terminal portion 2 is supplied to the DC device 102 through the plug 102a. A communication circuit 4 that performs communication between the plug connection unit 3 and a transmission processing unit 30 by superimposing a transmission signal on a DC voltage, a plurality of light emitting diodes 6a to 6e, and light emission of each of the light emitting diodes 6a to 6e. And a display control circuit 5 for controlling the display. The light emitting diodes 6a to 6d are for displaying the amount of current used in the branch circuit. If the amount of current used is less than 50% of the rated current (upper limit value) of the DC breaker 114, the display control circuit 5 emits light. If all the diodes 6a to 6d are turned off and the amount of current used is 50% or more and less than 70%, the display control circuit 5 turns on the light emitting diode 6d. If the amount of current used is 70% or more and less than 90% of the rated current, the display control circuit 5 turns on the light emitting diode 6c. If the amount of current used is 90% or more and less than 100% of the rated current, the display control circuit 5 turns on the light emitting diode 6b, and if the amount of current used becomes 100% or more of the rated current, the display control circuit 5 emits light. The diode 6a is turned on. Further, the light emitting diode 6e is for energization display, and the display control circuit 5 always lights the light emitting diode 6e during energization.

  Further, as shown in FIGS. 3 and 4, the container 10 of the DC outlet 1 is formed in a rectangular parallelepiped shape whose front surface is opened using a thermosetting synthetic resin (for example, urea resin) having excellent tracking resistance. By combining the body 11 and the cover 12 formed in a rectangular parallelepiped shape whose rear surface is opened using a synthetic resin having elasticity and excellent tracking resistance (for example, polybutylene terephthalate = PBT). It is formed. The container 10 has a prescribed unit dimension to be described later. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 3A, and the front in FIG. Therefore, the lower side in FIG. 3B is the rear side.

  A pair of assembly claws 13 project from the left and right end faces of the body 11. On the other hand, shoulders 14 project from the left and right ends of the cover 12, and assembly pieces 15 project from the rear edge of each shoulder 14 toward the body 11. Each assembly piece 15 is formed with a pair of engagement holes 16 for engaging with the assembly claws 13 provided in the body 11 in an uneven manner. At the front end of the assembly claw 13, a guide surface 13a that is inclined so as to reduce the amount of protrusion from the body 11 toward the front is formed. Therefore, when the cover 12 is assembled to the body 11, the assembly piece 15 is bent along the guide surface 13 a, and finally the engagement hole 16 provided in the assembly piece 15 is fitted to the assembly claw 13, thereby The cover 12 is joined. Thus, since the assembly piece 15 needs to be bent, the cover 12 is formed of a synthetic resin having elasticity.

  Inside the body 11, a blade receiving member 20a for a positive electrode and a blade receiving member 20b for a negative electrode are accommodated. Each blade receiving member 20a, 20b is formed in the same shape, and includes a pair of spring pieces 21 facing each other and a connecting piece 22 that continuously joins the base portions of both spring pieces 21 together. A terminal piece 23 is formed integrally with the spring piece 21 so as to protrude from both side edges of the one spring piece 21 in a direction away from each other. A printed wiring board (not shown) on which each circuit element described in FIG. 1 is formed is housed on the bottom side of the body 11 and electrically connected to the blade receiving members 20a and 20b. Yes.

  Furthermore, a lock spring 24 is disposed inside the body 11 so as to face the terminal pieces 23 of the blade receiving members 20a and 20b. The locking spring 24 is formed by bending one end portion of the belt plate into a J shape to form a contact piece 25 and bending the other end portion into an S shape to form a locking piece 26. The contact piece 25 and the locking piece 26 are accommodated in the body 11 so as to face the terminal piece 23. A release button 27 for releasing the connection state of the electric wires is housed so as to face the lock pieces 26 of the two lock springs 24.

  An electric wire insertion opening (not shown) is opened on the bottom surface of the body 11 so that an electric wire can be introduced between the terminal piece 23 and the lock spring 24. When the core wire from which the wire of the DC power supply line Wdc is peeled is introduced into the body 11 through this wire insertion port, the wire core wire is inserted between the lock spring 24 and the terminal piece 23, and contact is made. The electric wire is clamped between the terminal piece 23 by the spring force of the piece 25 and the locking piece 26, and the locking piece 26 bites into the electric wire, so that the electric wire cannot be pulled out. On the other hand, when releasing the connection state of the electric wire, the release button is inserted by inserting the tip of a tool such as a flat-blade screwdriver from an operation hole (not shown) opened in the bottom surface of the body 11 at a portion corresponding to the release button 27. When 27 is pushed, the lock button 26 is bent in the direction away from the electric wire by the release button 27, so that the locked state of the electric wire is released and the electric wire can be easily pulled out. Here, the above-mentioned input terminal part 2 is comprised by the terminal piece 23 of each blade receiving member 20a, 20b.

  On the other hand, the front wall of the cover 12 is formed with one insertion portion 18 into which a pair of plug blades 102b provided on the plug 102a of the DC device 102 are inserted and removed. The blade receiving members 20a and 20b have a pair of insertion openings 18a and 18b that open at portions corresponding to the spring pieces 21 and 21, respectively. Here, the plug connecting portion 3 described above is configured by the insertion portion 18 and the blade receiving members 20a and 20b. The insertion openings 18a and 18b have different lengths on the positive electrode side and the negative electrode side to prevent erroneous connection. Further, on the left side of the front wall of the cover 12, light-transmitting portions 7a to 7 for emitting light emitted from the light-emitting diodes 6a to 6e to the outside at positions corresponding to the light-emitting portions of the light-emitting diodes 6a to 6e described above. 7e is provided.

  In addition, in this embodiment, although the insertion part 18 of the plug connection part 3 is comprised by the insertion ports 18a and 18b in which a pair of parallel plug blades are inserted, the structure of the plug connection part 3 is limited to said structure. The plug connection portion 3 may have insertion ports 18a and 18b into which round pin-shaped contact pins are inserted as shown in FIG. 5A, not as intended, or as shown in FIG. 5B. Alternatively, the plug connection unit 3 having the plug 18 having a shape conforming to IEC 60906-3 may be used, and the present invention can be applied to the DC outlet 1 having the plug connection unit 3 of various forms.

  The above-mentioned container 10 is attached to a conventionally known plate used when, for example, an embedded wiring device is attached to a construction surface, and the shoulder portion 14 provided on both sides of the cover 12 is provided with a plate. A pair of mounting claws 19 are provided so as to project from each other. An inclined surface 19 a is formed at the front end portion of the mounting claw 19 so as to decrease the amount of protrusion from the shoulder portion 14 toward the front. The container body 10 of the present embodiment is formed in such a size that it can be attached to the above-mentioned standardized plate in a short width direction and can be attached up to three pieces. One piece is called module size. It should be noted that the size of the container 10 is not intended to be limited to one module size, but the size of the container 10 is two module dimensions (unit dimensions of the container as shown in FIGS. 6A and 6B). May be formed to be approximately the same size as two arranged in the short-width direction), or as shown in FIG. It may be formed in the same size as three arranged in the direction).

  In the DC outlet 1, the display control circuit 5 controls the lighting state of each of the light emitting diodes 6a to 6e. When the DC voltage is supplied through the DC power supply line Wdc, the light emitting diode 6e for energization display is displayed. Is always lit. Further, the transmission processing unit 30 (transmission processing unit) captures the measured value of the current sensor 40 (current amount measuring unit) at a predetermined sampling cycle, and superimposes the measured current amount of the current sensor 40 on the DC voltage. And transmitted to all DC outlets 1 of the same system connected to the DC breaker 114. At this time, in each DC outlet 1, the communication circuit 4 serving as a receiving unit receives the current amount measurement value transmitted by being superimposed on the DC voltage, and outputs the received data to the display control circuit 5. However, the light emitting diodes 6a to 6d corresponding to the used current amount are turned on based on the current measured current amount. Here, the display control circuit 5, the light emitting diodes 6a to 6d, and the like constitute current amount display means for displaying a current amount measurement value.

  As described above, in the present embodiment, the current use current amount is divided into a plurality of levels and displayed by the light emitting diodes 6a to 6d provided in each DC outlet 1, so that the user can present the current Current amount measured value can be confirmed. Therefore, when the amount of current used increases to near the upper limit value, the user can take measures such as refraining from using the DC device 102 so that the current amount does not exceed the upper limit value. Exceeding the upper limit can be suppressed. Further, the transmission processing unit 30 transmits the current amount measurement value superimposed on the DC voltage, and transmits the current amount measurement value using the DC power supply line Wdc, and therefore transmits the current amount measurement value. Therefore, there is an advantage that it is not necessary to prepare a separate signal line.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to the drawings. Since the overall configuration of the DC power distribution system is the same as that of the system of FIG. 11 described in the first embodiment, the description thereof will be omitted, and the characteristic part of the present embodiment will be described with reference to FIGS.

  The DC power distribution system of the present invention includes a DC breaker 114 (circuit breaker) connected to a DC power supply line Wdc from a DC power supply unit 101 (DC power supply), and a DC power supply line Wdc on the secondary side of the DC breaker 114. A DC outlet 1 connected to each of them, and a current sensor 40 (current amount measuring unit) for measuring the amount of current flowing on the secondary side of the DC breaker 114, and a current amount measurement value measured by the current sensor 40 as a direct current Transmission setting unit 30 that transmits the signal to a plurality of DC outlets 1 connected to the same DC breaker 114 in a superimposed manner with the voltage, and an address setting that transmits an address setting signal by a wireless signal including an optical signal such as an infrared signal And a container 50. Note that individual addresses are assigned to the transmission processing unit 30 and the DC outlet 1, and one-to-one communication is performed between the DC outlet 1 and the transmission processing unit 30 using the address assigned to each DC outlet 1. Can be done.

  The DC outlet 1 is connected to a plug of a DC device 102 that operates by receiving supply of DC power, and supplies DC power to the connected DC device 102. The input terminal 2 to which the DC power supply line Wdc is connected and the plug 102a of the DC device 102 are detachably connected, and the DC power input to the input terminal 2 is supplied to the DC device 102 through the plug 102a. The communication circuit 4 that performs communication between the connection unit 3 and the transmission processing unit 30 by superimposing the transmission signal on the DC voltage, the light-emitting diode 6e for energization display, and the power supply cutoff state to the DC device 102 are displayed. Light-emitting diode 6f, relay 8 provided in the electric circuit between the input terminal portion 2 and the plug connection portion 3, and lighting control of the light-emitting diodes 6e and 6f The control circuit 5 that performs control such as opening / closing control of the relay 8 and a light receiving element (not shown) that receives a wireless signal transmitted from the address setting unit 50 have a light receiving element from the address setting unit 50 using the light receiving element. And an address signal receiving circuit 9 for receiving the setting signal.

  The container 10 of the DC outlet 1 is formed in, for example, two module dimensions as shown in FIG. 10, and an insertion part having a shape conforming to IEC60906-3 is formed on the lower side of the front wall of the container 10. A plug connection 3 having 18 is provided. Further, on the upper part of the front wall of the vessel body 10, there are light-transmitting portions 7e and 7f for emitting light emitted from the light-emitting diodes 6e and 6f to the outside at positions corresponding to the light-emitting portions of the light-emitting diodes 6e and 6f. A light transmitting portion 7g for transmitting a wireless signal is provided at a position corresponding to the light receiving element of the address signal receiving circuit 9 while being provided.

  The transmission processing unit 30 includes, for example, a control circuit 31 that is configured by a microcomputer and performs overall control of each circuit element, and each DC outlet 1 by superimposing a transmission signal on a DC voltage supplied to the DC power supply line Wdc. A communication circuit 32 that performs communication between them, a receiving unit 33 that receives a setting signal transmitted as a wireless signal from the address setting unit 50, and a storage unit that stores setting information such as the address and priority of each DC outlet 1 34.

  Here, in the DC power distribution system of the present embodiment, first, the address setting unit 50 is used to set an address for each DC outlet 1, and the address and priority of each DC outlet 1 are set to the transmission processing unit 30. To do.

  That is, the contractor moves to the installation position of each DC outlet 1 with the address setting device 50 and operates the operation button (not shown) of the address setting device 50 to input the address of the DC outlet 1 to be set. After performing the operation, when the wireless signal transmission unit is brought close to the translucent unit 7g of the body 10 and the setting signal transmission operation is performed, the address setting signal is transferred from the address setting unit 50 to the DC outlet 1 by the wireless signal. Sent. When the address signal receiving circuit 9 receives the setting signal transmitted from the address setting unit 50 in the DC outlet 1 to be set, the control circuit 5 sets the address sent by the setting signal to a storage unit (not shown) as its own address. Remember as.

  In addition, the contractor moves to the installation position of the transmission processing unit 30 with the address setting device 50 and operates an operation button (not shown) of the address setting device 50 to set the address and priority of each DC outlet 1. When a setting signal transmission operation is performed after an input operation is performed, the address and priority setting signal of the DC outlet 1 is transmitted by a wireless signal from the address setting unit 50 serving as a priority setting unit to the transmission processing unit 30. Is done. Then, when the receiving unit 33 of the transmission processing unit 30 receives the setting signal transmitted from the address setting unit 50, the control circuit 31 stores the address of each DC outlet 1 and its priority order sent by the setting signal in the storage unit 34. Remember me.

  When the setting work is completed for all the DC outlets 1 and the transmission processing units 30, addresses are set for all the DC outlets 1 connected to the DC breakers 114, and each DC outlet is connected to the transmission processing unit 30. 1 and its priority are set, and the DC outlet 1 and the transmission processing unit 30 start operating. In the transmission processing unit 30, for example, a current amount corresponding to about 90% of the rated current of the DC breaker 114 is set in advance as an upper limit value of the amount of current used.

  When a DC voltage is supplied to each DC outlet 1 via the DC power supply line Wdc, the control circuit 5 of each DC outlet 1 turns on the light emitting diode 6e for energization display. In addition, the control circuit 5 closes the relay 8 and supplies DC power to the DC device 102 connected to the plug connection unit 3 and emits light in a state where the power cut-off signal is not input from the transmission processing unit 30. The diode 6f is turned off.

  On the other hand, in the transmission processing unit 30, the control circuit 31 takes in the measured value of the current sensor 40 (current amount measuring unit) at a predetermined sampling cycle, and the current amount measured value by the current sensor 40 and the predetermined upper limit value are obtained. Compare high and low. When the measured current value exceeds the upper limit value, the control circuit 31 of the transmission processing unit 30 starts from the DC outlet 1 having a lower priority order based on the priority order of each DC outlet 1 set in the storage unit 34. In order, the communication circuit 32 transmits a transmission signal including the address of the DC outlet 1 and the power supply cutoff signal.

  At this time, in each DC outlet 1, the communication circuit 4 receives the transmission signal transmitted from the transmission processing unit 30, and the control circuit 5 compares the address included in the transmission signal with its own address. If the address included in the transmission signal does not match its own address, the control circuit 5 of the DC outlet 1 keeps the relay 8 closed and supplies power to the DC device 102 connected to the plug connection unit 3. Continue. On the other hand, when the address included in the transmission signal coincides with its own address, the control circuit 5 of the DC outlet 1 opens the relay 8 to cut off the power supply to the DC device 102 connected to the plug connection unit 3. The light emitting diode 6f is turned on to display the power supply cutoff state.

  Here, in the control circuit 31 of the transmission processing unit 30, the DC outlet 1 having a low priority order is set according to the priority order set in the storage unit 34 until the current amount measurement value by the current sensor 40 becomes equal to or less than a predetermined upper limit value. Since the power supply from the DC outlet 1 to the DC device 102 continues to be cut off in order from the above, it is possible to reliably prevent the amount of current used from exceeding the upper limit value. In addition, since the power supply is cut off in order from the DC outlet 1 with the lower priority, the DC outlet 1 with the higher priority can be continuously supplied with power to the DC device 102.

  In this embodiment, the communication circuit 4, the control circuit 5, and the relay 8 constitute a cutoff unit that cuts off the power supply to the DC device 102 based on the power supply cutoff signal. A power supply cutoff unit is configured.

It is a schematic block diagram of the DC outlet used for the DC power distribution system of Embodiment 1. It is a schematic system block diagram same as the above. The DC outlet used for the above is shown, (a) is a front view, (b) is a bottom view, and (c) is a left side view. It is a disassembled perspective view of the DC outlet used for the same as the above. (A) (b) is a front view which shows the other structure of the DC outlet used for the same as the above. The two-module type DC outlet used for the above is shown, (a) is a front view and (b) is a side view. It is a front view of a three module type DC outlet used for the above. FIG. 3 is a schematic system configuration diagram of a DC power distribution system according to a second embodiment. It is a schematic block diagram of the DC outlet used for the same as the above. It is a front view of the DC outlet used for the same as above. 1 is a system configuration diagram of a DC power distribution system using a DC outlet according to each embodiment.

Explanation of symbols

1 DC outlet 4 Communication circuit (reception means)
5 Display control circuit (current amount display means)
6a to 6d Light emitting diode (current amount display means)
30 Transmission processing unit 40 Current sensor (current amount measuring unit)
114 DC breaker (circuit breaker)
Wdc DC feed line

Claims (4)

  In a DC power distribution system comprising a circuit breaker connected to a DC power supply line from a DC power source and a DC outlet connected to each of the DC power supply lines on the secondary side of the circuit breaker, the secondary side of the circuit breaker A current amount measuring unit that measures the amount of current flowing through the power source, and a transmission processing unit that superimposes the current amount measurement value measured by the current amount measuring unit on a direct current voltage and transmits the direct current to a direct current outlet. A DC power distribution system comprising: a receiving unit that receives a current amount measurement value transmitted from a transmission processing unit; and a current amount display unit that displays a current amount measurement value received by the receiving unit.   The circuit breaker connected to the DC power supply line from the DC power supply, the multiple DC outlets connected to the DC power supply line on the secondary side of the circuit breaker, and the amount of current flowing to the secondary side of the circuit breaker A current amount measuring unit to measure, a priority order setting unit for setting a priority order of each DC outlet, and a direct current with a low priority when a current amount measured by the current amount measuring unit exceeds a predetermined upper limit value. A DC power distribution system comprising: a power supply cutoff unit that cuts off power supply to a DC device in order from an outlet.   The power supply cut-off unit continues to cut off power supply from each DC outlet to a DC device according to the priority order until a current amount measurement value by the current amount measurement unit is equal to or lower than a predetermined upper limit value. The DC power distribution system according to claim 2.   When the current amount measured by the current amount measurement unit exceeds a predetermined upper limit value, in order from the DC outlet with the lower priority order, a transmission processing unit that superimposes a power cut-off signal on a DC voltage and transmits each, 4. The DC power distribution system according to claim 2, wherein the power supply cutoff unit is configured by a cutoff unit that is provided in a DC outlet and cuts off the power supply to the DC device when receiving a power supply cutoff signal.

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