JP2011223720A - Current distribution apparatus and voltage fluctuation suppression method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress voltage fluctuation, even when short circuit occurs in any device connected to a distribution apparatus, in other sound device.SOLUTION: In a distribution apparatus 10, a post panel 11 comprises a fuse 13 at pre-stage of which a branch point is placed, where a distribution line the number of which corresponds to the number of the fuse 13 in the post panel 11 is branched from the branch point and connected to the fuse 13 individually.

Description

  The present invention relates to a current distribution device that distributes a current output from a power supply device to a plurality of devices, and a voltage fluctuation suppression method thereof.

  As shown in FIG. 8, in the DC power supply system, the current distribution device 10 distributes the DC current output from the DC power supply device 20 to a plurality of devices 30. The device 30 is a general device connected to a direct current power supply system, and examples thereof include a communication device such as an exchange or a router. In FIG. 8, only one pole of the electric circuit is shown (the same applies to the following drawings).

  The current distribution device 10 shown in FIG. 8 is provided with a plurality of fuses 13 corresponding to the plurality of devices 30, and the plurality of fuses 13 are connected to the corresponding device 30 and the DC power supply device 20, respectively. The plurality of fuses 13 are separated for each fuse group including a predetermined number of fuses 13 (an integer greater than or equal to 2; three in FIG. 8), and each fuse group is mounted on a post panel (current distribution device panel) 11. Has been.

  In addition, the current distribution device 10 is provided with a predetermined number of capacitors (an integer greater than or equal to 1; three in FIG. 8), and these capacitors 14 are connected to the DC power supply device 20. These capacitors 14 are mounted on the capacitor box 12.

  In the DC power supply system shown in FIG. 8, when a short circuit occurs between the fuse 13 and the device 30 or inside the device 30, the short-circuit current instantaneously flows from the capacitor 14 toward the device 30 where the short circuit has occurred. Flows. By this short circuit current, the fuse 13 connected to the device 30 is blown, and the other healthy device 30 connected to the current distribution device 10 is protected.

  However, the DC power supply system shown in FIG. 8 is actually provided between the current distribution device 10 and the device 30, the current distribution device 10 and the DC power supply device 20, as shown in FIG. A resistance component and an inductance component exist in the wiring between the post panel 11 and the capacitor box 12 in the current distribution device 10.

  In the DC power supply system shown in FIGS. 8 and 9, the capacitor box 12 is located away from the post panel 11, so that the resistance component and the inductance component in the wiring between the post panel 11 and the capacitor box 12 are large. .

  Therefore, when a short circuit occurs in the device 30, the short circuit current necessary for fusing the fuse 13 becomes difficult to be supplied from the capacitor 14, so that the short circuit current is also sucked out from the other sound device 30. Voltage fluctuation occurs in the new device 30.

  Therefore, in Patent Document 1, in order to suppress the voltage fluctuation as described above, as shown in FIG. 10, as shown in FIG. 10, a current distribution device 10 having a configuration in which a capacitor 14 is disposed in the immediate vicinity of each post panel 11. Has been proposed. Specifically, the capacitor 14 is connected to the wiring between the corresponding post panel 11 and the DC power supply device 20.

  According to the current distribution device 10 described in Patent Document 1, by disposing the capacitor 14 in the immediate vicinity of the post panel 11, the resistance component and the inductance component in the wiring between the capacitor 14 and the fuse 13 can be reduced. It becomes possible to suppress the voltage fluctuation in the other sound device 30.

JP 2008-99522 A

  However, the DC power supply system shown in FIG. 10 actually has resistance to the wiring between the fuses 13 in the post panel 11 as well as between the capacitor 14 and the post panel 11 as shown in FIG. There are components and inductance components.

  At this time, the resistance component and the inductance component in the wiring between the fuse 13 and the capacitor 14 become larger as the fuse 13 is located away from the capacitor 14.

  Therefore, in the DC power supply system shown in FIGS. 10 and 11, for example, when a short circuit occurs in the device 30 connected to the rightmost fuse 13 in the post panel 11, a short circuit current is generated from the capacitor 14 to the rightmost fuse 13. Since it is difficult to supply, short-circuit current is also sucked out from other healthy devices 30 connected to the left end in the post panel 11 and the fuse 13 at the center, and voltage fluctuations in other healthy devices 30 may not be suppressed. .

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a current distribution device and a voltage variation suppression method thereof that can suppress voltage fluctuations in other sound devices when a short circuit occurs in any device.

The current distribution device of the present invention includes:
A current distribution device that distributes the current output from the power supply device to a plurality of devices,
A plurality of circuit breakers provided corresponding to the plurality of devices and connected to the corresponding devices;
A capacitor connected to the wiring between the plurality of circuit breakers and the power supply device,
The plurality of circuit breakers are separated for each circuit breaker group composed of a predetermined number (an integer of 2 or more) circuit breakers,
The predetermined number of wires are branched from a branch point arranged in the preceding stage of the circuit breaker group, and the branched wires are individually connected to the predetermined number of circuit breakers constituting the circuit breaker group. It is characterized by.

  The inductance component in the wiring between the capacitor and the branch point is smaller than the inductance component in the wiring between each of the circuit breakers constituting the circuit breaker group and the branch point.

In addition, it further includes a current distribution device panel that is provided corresponding to each circuit breaker group, and on which the circuit breakers constituting the corresponding circuit breaker group are mounted,
The branch point is provided inside the current distribution device panel.

The voltage fluctuation suppressing method of the current distribution device of the present invention is:
A current distribution device that distributes current output from a power supply device to a plurality of devices, the plurality of circuit breakers provided corresponding to each of the plurality of devices and connected to the corresponding devices, and the plurality of circuit breakers And a capacitor connected to the wiring between the power supply device and the power supply device, wherein the plurality of circuit breakers are separated for each circuit breaker group composed of a predetermined number (two or more integers) of circuit breakers A method for suppressing voltage fluctuation of a current distribution device,
The predetermined number of wires are branched from a branch point arranged in the previous stage of the circuit breaker group, and the branched wires are individually connected to the predetermined number of circuit breakers constituting the circuit breaker group. It is characterized by that.

  In the current distribution device of the present invention, a predetermined number of wires are branched from a branch point arranged in front of a circuit breaker group composed of a predetermined number of circuit breakers, and each branched wire constitutes a circuit breaker group. Individually connected to a predetermined number of circuit breakers.

  Therefore, the resistance component and the inductance component in the wiring between the circuit breakers constituting the circuit breaker group do not exist, so that the resistance component and the inductance component in the wiring between each circuit breaker are uniformly reduced.

  Therefore, even if a short circuit occurs in any device connected to the current distribution device, it is possible to obtain an effect that voltage fluctuations in other healthy devices can be suppressed.

It is a figure which shows an example of a structure of the DC power supply system containing the current distribution apparatus of the 1st Embodiment of this invention. It is a figure explaining the effect of the current distribution apparatus of the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the DC electric power feeding system containing the current distribution apparatus of the 2nd Embodiment of this invention. It is the schematic which shows an example of the connection structure of the capacitor | condenser in the current distribution apparatus of the 1st Embodiment of this invention. It is the schematic which shows the other example of the connection structure of the capacitor | condenser in the current distribution apparatus of the 1st Embodiment of this invention. It is the schematic which shows another example of the connection structure of the capacitor | condenser in the electric current distribution apparatus of the 1st Embodiment of this invention. It is the schematic which shows another example of the connection structure of the capacitor | condenser in the current distribution apparatus of the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the conventional DC power supply system. FIG. 9 is an equivalent circuit diagram of the DC power supply system shown in FIG. 8. It is a figure which shows the other example of a structure of the conventional DC power supply system. FIG. 11 is an equivalent circuit diagram of the DC power supply system shown in FIG. 10.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated with reference to drawings.
(First embodiment)
FIG. 1 shows an example of the configuration of a DC power supply system including a current distribution device 10 of the present embodiment.

  In the conventional current distribution device 10 shown in FIGS. 10 and 11, the current is branched in cascade with respect to each fuse 13 in the post panel 11.

  For this reason, resistance components and inductance components also exist in the wiring between the fuses 13 in the post panel 11, and as a result, a short circuit occurs particularly in the device 30 connected to the fuse 13 at a position away from the capacitor 14. In such a case, the short circuit current may be sucked out in the other sound device 30 and the voltage fluctuation may not be suppressed.

  On the other hand, in the current distribution device 10 of the present embodiment, as shown in FIG. 1, the number of fuses 13 in the post panel 11 from the branch point arranged in front of each fuse 13 in the post panel 11. The wiring corresponding to is branched, and each branched wiring is individually connected to each fuse 13 in the post panel 11. That is, each fuse 13 in the post panel 11 is star-connected to the above branch point.

  This eliminates the resistance component and the inductance component in the wiring between the fuses 13 in the post panel 11, so that even if a short circuit occurs in the device 30 connected to the fuse 13 at a position away from the capacitor 14, The effect that the voltage fluctuation in the healthy device 30 can be suppressed is obtained.

  Here, the effect of this embodiment will be described more specifically with reference to FIG. 2A shows a state when a short circuit occurs in the conventional current distribution device 10 shown in FIGS. 10 and 11, and FIG. 2B shows the current distribution of the present embodiment shown in FIG. The state at the time of the occurrence of a short circuit in the device 10 is shown.

  As shown in FIG. 2A, in the conventional current distribution device 10 shown in FIGS. 10 and 11, there is a space between the fuses 13-1 to 13-3 and the capacitor 14 in the post panel 11. A resistance component and an inductance component exist in the wiring between the fuses 13-1 to 13-3.

  Therefore, the resistance component and the inductance component in the wiring between the fuse 13-1 and the capacitor 14 that are farthest from the capacitor 14 are the largest.

  Therefore, when a short circuit occurs in the device 30-1 connected to the fuse 13-1, it is difficult to supply a short circuit current from the capacitor 14 to the fuse 13-1, so that other sound devices 30-2 and 30-3 are provided. The ratio of the short-circuit current that is sucked out from the device increases, and the voltage fluctuations in the devices 30-2 and 30-3 become large.

  On the other hand, as shown in FIG. 2 (b), in the current distribution device 10 of the present embodiment shown in FIG. 1, there is a post between each fuse 13-1 to 13-3 and the capacitor 14. There is no resistance component or inductance component in the wiring between the fuses 13-1 to 13-3 in the panel 11.

  Therefore, the resistance component and the inductance component in the wiring between each of the fuses 13-1 to 13-3 and the capacitor 14 are uniformly smaller than those of the conventional current distribution device 10 shown in FIGS. .

  Therefore, even if a short circuit occurs in any of the devices 30-1 to 30-3, a large short circuit current is supplied from the capacitor 14 to the fuse 13 connected to the device 30 in which the short circuit has occurred.

  Therefore, for example, as shown in FIG. 2B, when a short circuit occurs in the device 30-3, a large short-circuit current is supplied from the capacitor 14 to the fuse 13-3. , 30-2, the ratio of the short-circuit current sucked out can be reduced, and voltage fluctuations in the devices 30-1 and 30-2 can be suppressed.

  In order to supply a large short-circuit current from the capacitor 14 to the fuse 13 and reduce the ratio of the short-circuit current drawn from the other sound device 30, the resistance component in the wiring between the capacitor 14 and the branch point Of the inductance components, in particular, the inductance component is more preferably smaller than the inductance component in the wiring between each fuse 13 and the branch point.

As a means for that, for example, the wiring length between the capacitor 14 and the branch point may be shorter than the wiring length between each fuse 13 and the branch point, but there is no particular limitation.
(Second Embodiment)
As described above, in the current distribution device 10 of the first embodiment shown in FIG. 1, it is possible to suppress voltage fluctuations in other healthy devices 30 regardless of which device 30 is short-circuited. Become.

  However, in the current distribution device 10 of the first embodiment, the connection between the main body portion of the current distribution device 10 and the post panel 11 is compared with the conventional current distribution device 10 shown in FIGS. 10 and 11. The score increases, which causes another problem.

  That is, a connector or the like is used for a connection portion between the main body portion of the current distribution device 10 and the post panel 11, but as the number of fuses 13 mounted on the post panel 11 increases, the connector pin is accordingly increased. Since the number and the number of cables to be connected to the connector increase, another problem arises that the cost increases and the size of the current distribution device 10 increases.

  Therefore, in the current distribution device 10 of the present embodiment, as shown in FIG. 3, by providing a branch point in the post panel 11 for branching the wiring to each fuse 13 in the post panel 11, the current distribution device 10. The number of connection points between the main body portion and the input portion of the post panel 11 is reduced.

  With such a configuration, it is possible to reduce the number of connector pins used in the connection portion between the main body portion of the current distribution device 10 and the input portion of the post panel 11 and the number of cables wired to the connector. The effect that the increase in the size of the distribution apparatus 10 can be suppressed is obtained.

  Further, even in the current distribution device 10 of the present embodiment, since there are no resistance component and inductance component in the wiring between the fuses 13 in the post panel 11, voltage fluctuations in the device 30 are suppressed as in the first embodiment. The effect is obtained.

  In the first and second embodiments described above, one capacitor 14 is provided for each post panel 11. FIG. 4 shows a schematic diagram of capacitor connection according to the first embodiment. However, the number of capacitors 14 and the connection configuration are not limited to this.

  For example, as shown in FIGS. 5 and 6, a plurality of capacitors 14 (two in FIGS. 5 and 6) may be provided corresponding to each post panel 11.

  Alternatively, as shown in FIG. 7, the capacitor 14 may be additionally provided at any position on the wiring between the post panel 11 and the DC power supply device 20 in addition to being provided corresponding to each post panel 11. .

  In the first and second embodiments described above, the fuse 13 is provided as a circuit breaker for protecting the device 30. However, the circuit breaker is not limited to a fuse, such as a semiconductor circuit breaker. Other circuit breakers may be used.

10 Current Distribution Device 11 Post Panel 13 Fuse 14 Capacitor 20 DC Power Supply Device 30 Device

Claims (4)

A current distribution device that distributes the current output from the power supply device to a plurality of devices,
A plurality of circuit breakers provided corresponding to the plurality of devices and connected to the corresponding devices;
A capacitor connected to the wiring between the plurality of circuit breakers and the power supply device,
The plurality of circuit breakers are separated for each circuit breaker group composed of a predetermined number (an integer of 2 or more) circuit breakers,
The predetermined number of wires are branched from a branch point arranged in the preceding stage of the circuit breaker group, and the branched wires are individually connected to the predetermined number of circuit breakers constituting the circuit breaker group. Current distribution device.   2. The current according to claim 1, wherein an inductance component in a wiring between the capacitor and the branch point is smaller than an inductance component in a wiring between each of the circuit breakers constituting the circuit breaker group and the branch point. Dispensing device. A current distribution device panel that is provided corresponding to each circuit breaker group and on which a circuit breaker constituting the corresponding circuit breaker group is mounted;
The current distribution device according to claim 1, wherein the branch point is provided inside the current distribution device panel. A current distribution device that distributes current output from a power supply device to a plurality of devices, the plurality of circuit breakers provided corresponding to each of the plurality of devices and connected to the corresponding devices, and the plurality of circuit breakers And a capacitor connected to the wiring between the power supply device and the power supply device, wherein the plurality of circuit breakers are separated for each circuit breaker group composed of a predetermined number (two or more integers) of circuit breakers A method for suppressing voltage fluctuation of a current distribution device,
The predetermined number of wires are branched from a branch point arranged in the previous stage of the circuit breaker group, and the branched wires are individually connected to the predetermined number of circuit breakers constituting the circuit breaker group. , Voltage fluctuation suppression method.

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