JP4826380B2 - DC power distribution system - Google Patents

Description

  The present invention relates to a power conversion unit that converts commercial AC power into DC power for a DC system unit arranged as an internal unit in a distribution board, and a DC power distribution system that supplies DC power from a battery unit.

  In order to branch and wire the power lines drawn from the outdoors, a main breaker and a distribution board equipped with a branch breaker are installed in houses and the like.

  The distribution boards installed in these houses are generally used for power distribution for commercial AC power supplies. However, distribution boards with equipment that obtains DC power and supplies power to DC loads as internal units are also available. Provided (for example, Patent Document 1).

The DC power supply device provided in the distribution board of Patent Document 1 incorporates a circuit unit such as an AC / DC converter and a power storage unit such as a storage battery in a casing having the same form as a branch breaker. A power supply connection section for connecting to a commercial AC power supply through a conductive bar for power lines in the same manner as a breaker, and a power output terminal section for supplying AC / DC converted DC power and DC power of a power storage section to an external DC load It is the composition provided with.
Japanese Patent Laying-Open No. 2005-224066 (FIG. 6, paragraph 0028)

  By the way, in recent years, the use of devices that require DC power, such as communication devices and LED lighting devices, has increased. In addition, a device using an external power supply unit such as an AC adapter connected to a power outlet is increasing without incorporating a power supply unit for obtaining a direct current like a conventional large electric device. For this reason, there are cases where the power outlet and the surroundings become complicated due to the direct connection of the AC adapter or the connection line for connecting to the device from the AC adapter. Therefore, there is a demand for a system for direct current distribution using a distribution board or the like that can be organized in the same manner as the wiring of an indoor power line.

  Therefore, it is conceivable to use a configuration in which a power supply device as disclosed in Patent Document 1 is arranged as an internal unit on a distribution board. However, the power supply device described in Patent Document 1 has a single DC load ( Since the AC / DC converter is built in the form corresponding to the DC system unit), there is a problem that the power conversion efficiency is poor.

  Further, since the power storage unit is provided corresponding to each DC system unit, there is a problem that the cost is increased. Furthermore, since the power storage device is built in the power supply device together with the AC / DC converter, there is a problem that the size of the power supply device is increased when a large capacity power supply device is to be manufactured.

  Furthermore, when a plurality of DC system units are made to correspond to one power supply device, for example, when used in a home wiring system in which system expansion and change are frequently performed, it is necessary to make the power supply capacity variable. However, it cannot be handled by a storage battery built-in device such as the power supply device disclosed in Patent Document 1. In addition, since the capacity of the storage battery is limited, it is difficult to continuously provide a stable power supply during a power failure or the like.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to make it possible to easily increase or decrease the power capacity and to contribute to indoor aesthetics without exposing the DC system unit to the room. To provide a power distribution system.

In order to achieve the above object, in the invention of claim 1, commercial AC power supplied by a branched power line from a distribution board equipped with a power system device such as a branch breaker for indoor wiring or a main breaker is obtained. and a single power converter for converting the DC power, a plurality of direct current system equipment units, each via a DC feed line from the power conversion unit receives the power supply DC power, said plurality of direct current system by the power converter unit A battery unit that backs up the supply of DC power to the device unit is provided separately from the distribution board and provided in a single DC distribution board.

According to the first aspect of the present invention, a DC power device unit and a power system device unit are provided by providing a commercial power conversion unit and a DC system device unit in a separate DC power distribution board with respect to a distribution board in which the power system equipment is built. Since it can be installed and installed separately, it can be installed in a location suitable for the location of the DC system unit, and since the DC system unit is provided in the DC switchboard, the DC system unit Is not exposed to the room, and power is supplied from the power conversion unit to the internal DC system unit, so there is no need to incorporate a power supply unit in each DC system unit, or no DC adapter is required. The cost of system equipment units can be reduced, and connection to a power outlet is not required, and the complexity around the power outlet is eliminated, contributing to the improvement of the indoor aesthetics. According to the first aspect of the present invention, the operation of the DC system unit can be maintained even if the DC power supply from the power converter is hindered, and the capacity of the battery unit can be increased. Therefore, stable backup power supply can be performed even during a power failure, and backup power supply can be performed directly via a DC power supply path without using an inverter device or the like.

  According to a second aspect of the present invention, in the first aspect of the present invention, a conductive bar connected to a DC output end of the power converter is disposed in the DC switchboard, and the DC system unit is connected to the conductive bar. A plug-in connection portion is provided that is electrically connected to and away from the plug.

  According to the invention of claim 2, the connection between the DC system unit and the power conversion unit can be easily connected and detached in the same manner as the branch breaker in the distribution board, and the construction in the panel can be easily performed.

In the invention of claim 3, in the invention of claim 1 or 2, wherein the battery unit is characterized by comprising the battery module connected before Symbol DC feed line.

According to the invention of claim 3 , even if there is an increase / decrease in the DC system unit to be used, the capacity of the battery unit can be accommodated by increasing / decreasing the storage module, and the battery unit is built in the DC switchboard. Therefore, the battery unit is not exposed indoors, and the appearance around the DC switchboard is good.
According to a fourth aspect of the invention, in the third aspect of the invention, the power conversion unit includes a control unit that sends a control signal to the storage battery module when the voltage of a commercial AC power supply drops to a predetermined voltage. A secondary battery group, a switch circuit interposed between the secondary battery group and the DC power supply path, and when the control signal is acquired from the power converter, the switch circuit is turned on to And a battery control unit that feeds DC power of the secondary battery group to the plurality of DC system device units.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the battery unit includes one or more power storage modules constituting the battery unit connected to the conductive bar by a plug-in connection portion. And

  According to the fifth aspect of the present invention, since the battery module and the conductive bar of the battery unit are connected by the plug-in connection portion, the number of power storage modules can be increased and reduced easily.

According to a sixth aspect of the present invention, in the first or second aspect of the invention, the battery unit is built in the DC power distribution board, and a connection circuit between the AC / DC conversion means and the DC / DC conversion means in the power conversion unit. It is characterized by being connected to.

  According to the invention of claim 6, the battery unit can be charged with the DC output of the AC / DC conversion means of the power conversion unit, and the DC power of the battery unit is supplied to the DC system unit by the DC / DC voltage. Since the voltage can be converted to a predetermined voltage by the DC conversion means, the output voltage of the storage battery module to be used may not be the voltage when power is supplied to the DC system unit, and the battery unit is built in the DC switchboard, and the battery unit Is not exposed indoors, and the appearance around the DC switchboard is good.

  The present invention provides a commercial power conversion unit and a DC system device unit in a separate DC switchboard with respect to a distribution board that houses the power system equipment, so that the DC system unit and the power system unit are separated and installed. Because it can be installed, it can be installed in a location suitable for the location of the DC system unit, and since the DC system unit is provided in the DC switchboard, the DC system unit is exposed to the room. In addition, since power is supplied from the power conversion unit to the built-in DC system unit, it is not necessary to incorporate a power supply unit in each DC system unit, or an AC adapter is not required, and the cost of the DC system unit is reduced. In addition, it is not necessary to connect to a power outlet and the like, and the complexity around the power outlet is eliminated, thereby contributing to the improvement of the indoor aesthetics.

  Embodiments of the present invention will be described below.

(Embodiment 1)
FIG. 1 shows a schematic system diagram of the first embodiment. As shown, this embodiment arranges a commercial AC power system internal unit such as a limiter 2, a main breaker 3, and a branch breaker 4 in the main body 1a. A distribution board 1 provided, a power conversion unit 5, various DC system units 6 (6a, 6b,...), Which will be described later, and a DC distribution board 1 ′ having a battery unit B disposed in the main body 1b are provided as basic components. ing.

  A power line of, for example, a single-phase three-wire commercial AC power source drawn into the main body 1 a of the distribution board 1 is connected to the main breaker 3 via the limiter 2, and L1, L2, N on the load side of the main breaker 3 One end of a conductive bar 7 is connected to each terminal corresponding to each of the poles, and the plug-in type power supply side terminal portion of each branch breaker 4 is connected to the N-pole conductive bar 7 and the L1 or L2 conductive bar 7. (Not shown) is connected, and the indoor power line is branched by each branch breaker 4.

  As the configuration of the plug-in type power supply connection portion of the branch breaker 4, a well-known configuration such as the power supply connection portion of the branch breaker described in Patent Document 1 described above may be used, and illustration and description of this configuration are omitted. . Further, since the conductive bars 7 are arranged so as to overlap each other when viewed from the front direction of the main body 1a, they are visible in FIG.

  Then, the branch power line L connected to any one of the branch breakers 4 in the distribution board 1 and led out of the distribution board 1 is introduced into the main body 1b of the separate DC distribution board 1 ′ provided side by side, It is connected to the power input end of the power conversion unit 5 in the DC switchboard 1 ′ so that commercial AC power is supplied to the power conversion unit 5.

  In the figure, the power converter 5 in the DC switchboard 1 'is connected to one end of a conductive bar 8 for a DC power supply path on a DC power output terminal (not shown) corresponding to each of positive and negative poles provided on the right side. Is connected. Here, the positive and negative poles of the DC power supply path conductive bar 8 are arranged so as to overlap each other when viewed from the front, and thus are visible in FIG.

  Now, various DC system units 6 (6a, 6b...) Are arranged on the upper and lower sides of the conductive bar 8, and storage battery modules 9 of the battery unit B are arranged. Various DC system units 6 are arranged. (6a, 6b...) Inserts the conductive bar 8 into the plug-in connection portion 10 (see FIG. 2) for power input provided at the end on the conductive bar 9 side, and the contact piece 10a in the plug-in connection portion 10 is inserted. The conductive bar 8 is connected to the conductive bar 8 so as to be freely separated from the conductive bar 8.

  On the other hand, each storage battery module 9 of the battery unit B has a plug-in terminal portion (not shown) similar to the plug-in connection portion 10 corresponding to the positive and negative electrodes, and is connected by this plug-in terminal portion. Thus, the direct current power of the storage battery module 9 can be supplied to the conductive bar 8. The battery unit B can increase or decrease the overall capacity by increasing or decreasing the number of storage battery modules 9 used.

  Here, the DC system unit 6 (6a, 6b...) And the both ends of each storage battery module 9 in the direction orthogonal to the conductive bar 8 are made constant so that the DC system unit 6 (6a, 6b. When the storage battery modules 9 are arranged side by side, the positions in both ends (upper and lower ends in the figure) are aligned. Note that the width of the storage battery module 9 varies depending on the capacity.

   FIG. 3 is a circuit diagram showing the connection relationship between the power conversion unit 5 of this embodiment and the power storage module 9 of the battery unit B. As shown in the figure, the power conversion unit 5 is a single-phase three-wire of L1, N, and L2. A rectifier circuit 5A that is an AC / DC converter by inputting a commercial AC power source, and a DC / DC converter that is a DC / DC converter that further lowers a predetermined DC voltage obtained by the rectifier circuit 5A to a predetermined voltage 5B, a voltage detection circuit 5C that detects the voltage of the commercial AC power supply from the voltage across the resistor R1 connected from the rectifier circuit 5A to the output terminal, and the commercial AC power supply voltage detected by the voltage detection circuit 5C is a predetermined voltage (for example, power failure) And a control unit 5E for sending a control signal to each storage battery module 9 via the communication unit 5D when the voltage drops to 0V).

On the other hand, each storage battery module 9 constituting the battery unit B includes a secondary battery group 9A, a switch circuit 9B interposed between the positive and negative electrodes of the secondary battery group 9A and the above-described plug-in terminal portion, and communication. A communication unit 9C that receives a control signal transmitted from the unit 5D, and a battery control unit 9D that turns on the switch circuit 9B when the control signal is received by the communication unit 9C. The positive electrode is connected to the positive electrode output terminal of the power converter 5 via a diode D for backflow prevention with a cable or the like. Incidentally switching circuit 9B is positive electrode side only on / off, and a through negative electrodes side for charging. In addition, the operation power source of the circuit in the storage battery module 9 is obtained from the secondary battery group 9A.

  Thus, the power converter 5 normally rectifies and steps down the commercial AC power source with the rectifier circuit 5A, further reduces the DC voltage as the rectified output to a predetermined DC voltage with the DC / DC converter 5B, and reduces the DC voltage thus reduced. Is applied to the conductive bar 8 to supply DC power to the DC system unit 6 (6a, 6b...) And to charge the secondary battery group 9A of each storage battery module 9 of the battery unit B.

  In addition, when the voltage detection circuit 5C detects that the commercial AC power supply voltage has dropped to a predetermined voltage or less due to a power failure or the like, the power conversion unit 5 sends control signals to the control signals through the communication unit 5D under the control of the control unit 5E. While sending to the storage battery module 9, the operation | movement of DC / DC converter 5B is stopped.

  On the other hand, in each storage battery module 9, when the control signal from the power conversion unit 5 is received by the communication unit 9C, the battery control unit 9B turns on the switch circuit 9B based on the control signal, so that the secondary battery group 9A is connected to the conductive bar 8. , 8 and backup power is supplied to the DC system unit 6 (6a, 6b...) With the DC power of the secondary battery group 9A.

  As shown in FIG. 4, a power sensor includes a current sensor 5F that detects an input current and a current monitoring unit 5G that detects whether or not the input current detected by the current sensor 5F is greater than or equal to a preset threshold value. When the current monitoring unit 5G detects that the input current is equal to or greater than the threshold value, the control signal is sent from the communication unit 5D to the storage battery module 9 under the control of the control unit 5E. Similarly, DC power supply by the storage battery module 9 may be performed. In this case, the operation of the DC / DC converter 5B is continued, and the storage battery module 9 supplements the DC power supply by the power converter 5. The operation at the time of a power failure is the same as that of the circuit of FIG.

  Here, the DC system unit 6 used in the present embodiment will be described. The DC system device unit 6 is divided into an information system device unit, which will be described later, responsible for information communication, and a DC wiring connection terminal unit 6e for sending and supplying DC power supplied through the conductive bar 8 to an external DC using device. In FIG. 1, as an information system unit, WAN communication device unit 6a such as a gateway connected to the Internet or the like network, LAN communication device unit 6b, and LED lighting terminal 11 installed outside, together with lighting power, There is a controller unit 6c for sending a control signal for dimming control, a security unit installed outside, a sensor unit 6d for sending operation power to the sensor 12 such as a disaster prevention sensor and receiving a detection signal from the sensor 12.

  For example, the communication device units 6a and 6b, the controller unit 6c, and the sensor unit 6d have a built-in communication function for exchanging information with each other by superimposing a signal on the DC voltage of the conductive bar 8, and on the LAN. A dimming operation signal is sent to the controller unit 6c from the operation display unit 13 provided in the LAN through the LAN communication device unit 6b, and the LED lighting terminal 11 is dimmed, or from the controller unit 6c through the LAN communication device unit 6b. Information on the dimming state is sent to the operation display unit 13 to display the dimming state, and detection information of the sensor unit 6d is further sent to the operation display unit 13 via the communication device unit 6b. Can be displayed.

  In addition, as the DC power supply wiring terminal unit 6e, a feeding line 15 is connected to an external terminal device 14 from a terminal portion 16 composed of a quick connection terminal provided with DC power input from the plug-in connection portion 10 through the conductive bar 8 on the front surface. Power is supplied through the cable.

  In the present embodiment configured as described above, the power system equipment and the DC system equipment unit 6 are provided in the main body 1a of one distribution board 1 so that the installation of the DC system equipment unit 6 can be divided. It can be done at the same time as the installation of the panel 1, simplifies the installation of the DC system unit 6, and the DC system unit 6 is not exposed to the room, which is advantageous for indoor aesthetics, and the power provided in the distribution panel 1 Since the conversion unit 5 can supply power to the DC system unit 6 in a lump, it is not necessary to use an AC adapter or a built-in power supply for each DC system unit, and the cost of the DC system unit 6 can be reduced. In addition, the complexity around the power outlet can be eliminated, and the capacity of the backup battery unit B can be changed simply by changing the number of storage battery modules 9 used. It is possible.

(Embodiment 2)
In the above-described first embodiment, the storage battery module 9 constituting the battery unit B is directly connected to the conductive bar 8 in the same manner as the DC system unit 6 to supply power. However, in the present embodiment, the DC switchboard 1 ′ is used. However, the battery unit B is connected to the power conversion unit 5 and the DC power of the battery unit B is transmitted through the power conversion unit 5 as shown in FIG. This is different from the first embodiment in that backup power can be supplied to the 8 side. In FIG. 5, the same components as those of the first embodiment other than the above-described configuration are denoted by the same reference numerals, and the description thereof is omitted.

  The battery unit B has basically the same configuration as the storage battery module 9 of the first embodiment as shown in FIG. 6, for example, but the capacity can be increased or decreased by increasing or decreasing the number of secondary battery groups 9A. It has become. Then, the positive and negative electrodes of the storage battery module 90 composed of the secondary battery group 9A group are connected in parallel to the electric circuit between the rectifier circuit 5A and the DC / DC converter 5B in the power converter 5 via the switch circuit 9B. In addition, the configuration is such that the positive electrode of the rectifier circuit 5A and the positive electrode of the storage battery module 90 are connected via a diode D.

  On the other hand, the configuration of the power converter 5 is the same as the configuration of FIG. 4 except that the current sensor 5F is inserted at a position closer to the rectifier circuit 5A than the connection position of the battery unit B described above.

  Therefore, in the battery unit B in the present embodiment, the switch circuit 9B is normally off and the DC power from the storage battery module 90 is not input to the DC / DC converter 5B, but from the rectifier circuit 5A via the diode D. Then, the storage battery module 90 is charged by supplying power to the storage battery module 90. When the commercial power supply voltage drops due to a power failure or the like, the switch circuit 9B is turned on under the control of the battery control unit 9D based on the control signal from the power conversion unit 5 as in the first embodiment, and the rectifier circuit 5A and the DC / DC The voltage of the storage battery module 90 is applied to the electric circuit of the DC converter 5B. As a result, the detection voltage of the voltage detection circuit 5C increases.

  On the other hand, in the current sensor 5F provided on the output side of the rectifier circuit 5A, the current from the rectifier circuit 5A does not flow, so the current monitoring unit 5G does not output the detection output to the control unit 5E because the input current does not exceed the threshold value. . Therefore, the control unit 5E maintains transmission of the control signal to the battery unit B. Therefore, the ON state of the switch circuit 9B is maintained even if the detection voltage increases as described above. On the other hand, the control unit 5E controls the voltage detection circuit 5C to maintain the operation of the DC / DC converter 5B in order to detect the voltage. As a result, the storage battery module 90 of the battery unit B supplies DC power to the conductive bar 8 at a voltage stepped down to a predetermined voltage by the DC / DC converter 5B.

  When the input current increases during normal operation, the circuit operates in the same manner as the circuit of FIG. When the commercial AC power supply is restored from a power failure, when the current flows from the rectifier circuit 5A and the detection signal is input from the current sensor 5F to the control unit 5E via the current monitoring unit 5G, the control unit 5E is connected to the battery unit B. The transmission of the control signal is stopped, the switch circuit 9B of the battery unit B is turned off, the power supply from the storage battery module 90 is stopped, and charging by the output of the rectifier circuit 5A is started.

  Thus, in this embodiment, although the connection configuration of the battery unit B is different from that of the first embodiment, the point that it is built in the main body 1b of the DC switchboard 1 ′ is the same as that of the first embodiment. There are similar advantages.

(Embodiment 3)
In both of the first and second embodiments, the battery unit B is built in the main body 1b of the DC switchboard 1 ′. However, in the present embodiment, the battery unit panel 100 having the same panel configuration as the distribution board 1 is shown in FIG. The battery unit B configured by detachably mounting one or a plurality of storage battery modules 101 in the main body 100a of the battery unit panel 100 is configured separately from the distribution panel 1 and the DC distribution panel 1 ′. The battery unit B provided separately is connected to the power conversion unit 5 using the connection cable 102. In this connection cable 102, positive and negative battery electrode terminals in which storage battery modules 101 are connected in parallel are connected between the rectifier circuit 5A of the power converter 5 and the DC / DC converter 5B in the same manner as in the second embodiment. It consists of a connection line to be connected, a communication line for connecting the communication units 9C and 5D, and a charging line for connecting the positive side output of the rectifier circuit 5A to the positive electrode via the diode D. The terminals of the positive and negative battery electrodes may be connected to the conductive bars 8 and 8. In FIG. 7, the same components as those of the first embodiment other than the configuration described above are denoted by the same reference numerals, and description thereof is omitted.

Here, as shown in FIG. 8A, the battery storage panel 100 has a space for storing a plurality of storage battery modules 101 in the main body 100a, and the storage battery module is mounted on the lid body 100b attached to the front opening of the main body 100a. An opening window 100c is provided to allow the front protrusion 101a (see FIG. 8D) of 101 to face. Further, as shown in FIG. 8B, the positive and negative conductive bars 103a and 103b are arranged in parallel at a predetermined interval on the inner back of the main body 100a so as to overlap when viewed from the front. is there. The conductive bars 103a, 103b are both ends are fixed to the back of the main body 100a through the insulator 104 as shown in FIG. 8 (c), Ru and Tei held a distance therebetween to be constant. As shown in FIG. 8D, plug-in connection portions 105a and 105b having positive and negative contact pieces 106a and 106b are provided at the ends of the storage battery modules 101 so as to correspond to the conductive bars 103a and 103b. The storage battery module 101 is connected to the conductive bars 103a and 103b by inserting the conductive bars 103a and 103b into the plug-in connection portions 105a and 105b and sandwiching the conductive bars 103a and 103b with the internal connection pieces 106a and 106b, respectively. It is designed to be electrically connected to the door. Accordingly, one or a plurality of storage battery modules 101 can be connected in parallel via the conductive bars 103a and 103b, and the capacity of the battery unit B having a variable capacity can be configured by adjusting the number of storage battery modules 101 to be connected. Can be done.

  As shown in FIG. 9A, the conductive bars 103a and 103b are arranged in parallel vertically on the inner back of the main body 100a, and the connecting pieces 107a and 107b, which are paired with each other, are connected as shown in FIG. A pair of terminal holes 108a and 108b for inserting connection pieces 107a and 107b are formed on the back surface of the storage battery module 101 as shown in FIG. 9C, and connected to the terminal holes 108a and 108b. By inserting the pieces 107a and 107b and sandwiching the connecting pieces 107a and 107b with the contact pieces 109 in the terminal holes 108a and 108b as shown in FIG. 9D, the storage battery module 101 can be contacted and separated from the conductive bars 103a and 103b. You may make it connect electrically. Here, the terminal holes 108a and 108b and the contact piece 109 constitute a plug-in connection portion.

  Thus, in this embodiment, in addition to the same advantages as those of the first and second embodiments, a battery unit B having a panel shape is juxtaposed with the distribution board 1 to convert power in the battery unit B and the distribution board 1. By connecting the circuit of the unit 5 with the connection cable 102, a DC power distribution system capable of large capacity backup can be constructed. For example, by using the battery unit B in which the number of the storage battery modules 101 is adjusted corresponding to the increase / decrease of the DC system unit 6, a backup power source with an appropriate capacity for the load can be secured.

  In addition, as shown in FIG. 10, the integrated unit 110 which collects the charging / discharging information of the storage battery module 101 and the storage battery module 101 is incorporated in the main body 100a, and the display unit 110a for information display provided on the front surface of the integrated unit 110 is a lid 100b. You may make it display so that the charging / discharging information of the storage battery module 101 can be visually recognized from the outside by exposing from the opening window 100b.

1 is a schematic system configuration diagram of Embodiment 1. FIG. It is a side view of the principal part which abbreviate | omitted one part fracture | rupture which shows the connection structure of the direct-current system unit of Embodiment 1, and an electroconductive bar. FIG. 3 is a circuit diagram illustrating a connection relationship between the power conversion unit and the power storage module according to the first embodiment. 6 is a circuit diagram illustrating a connection relationship between a power conversion unit and a power storage module according to another example of Embodiment 1. FIG. 6 is a schematic system configuration diagram of Embodiment 2. FIG. It is a circuit diagram which shows the connection relation of the power converter of Embodiment 2, and a battery unit. FIG. 6 is a schematic system configuration diagram of Embodiment 3. (A) is a perspective view of a battery unit used in the third embodiment, (b) is an explanatory view of an attached state of a power storage module constituting the battery unit, and (c) is a part of a main portion of a conductive bar connecting the power storage module. FIG. 4D is an enlarged perspective view of the power storage module. (A) Arrangement block diagram of the conductive bar in another example of the battery unit used in Embodiment 3, (b) is an enlarged perspective view in which a part of the conductive bar is omitted, (c) is an enlarged perspective view of the power storage module, d) is a partially omitted enlarged cross-sectional view showing the connection state of the power storage module and the conductive bar, It is a perspective view of the other example of the battery unit used for Embodiment 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Distribution board 1a Main body 1b DC distribution board 2 Limiter 3 Master breaker 4 Branch breaker 5 Power conversion part 6a, 6b Communication equipment unit 6c Controller unit 6d Sensor unit 6e DC wiring connection terminal unit 7, 8 Conductive bar 9 Power storage module 11 LED illumination Terminal 12 Sensor 13 Operation display unit 14 Terminal device 15 Feed line 16 Terminal section
B Battery unit L Branch power line

Claims (6)

And a single power converter for converting commercial AC power into DC power supplied by the branched power lines from the interior of the power system equipment, such as a branch breakers and the main breaker for interior wiring distribution board, each said A plurality of DC system units that receive DC power from the power conversion unit via a DC power supply path; and a battery unit that backs up DC power supply to the plurality of DC system units by the power conversion unit. A DC power distribution system that is provided separately from the distribution board and is provided in a single DC power distribution board. A plug-in connection in which a conductive bar connected to a DC output end of the power conversion unit is disposed in the DC switchboard, and the DC system unit is electrically connected to and away from the conductive bar. The DC power distribution system according to claim 1, further comprising a unit. 3. The DC power distribution system according to claim 1 , wherein the battery unit includes the storage battery module connected to the DC power supply path . The power conversion unit includes a control unit that sends a control signal to the storage battery module when the voltage of a commercial AC power supply drops to a predetermined voltage, and the storage battery module includes a secondary battery group, the secondary battery group, and A switch circuit interposed between the DC power supply path, and the switch circuit is turned on when the control signal is acquired from the power conversion unit, and the DC power of the secondary battery group is supplied to the plurality of DC system unit units. The DC power distribution system according to claim 3, further comprising a battery control unit that supplies power to the battery . To the DC distribution panel in, arranged a connected conductive bar to the DC output ends of the power conversion unit, the battery unit is connected to more the conductive bar 1 or a plurality of said power storage battery module to the connection plug contact The direct current distribution system according to claim 3 or 4, wherein the direct current distribution system is provided. The battery unit, the DC distribution system according to claim 1 or 2, characterized in that connected to the connection path between the AC / DC converting means and the DC / DC converting means before Symbol in the power converter.

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