JP5284885B2 - Power supply device - Google Patents

Description

  The present invention relates to a power feeding device that feeds power to a repeater of a submarine transmission system.

  Conventionally, a power supply device that supplies power to a repeater of a submarine transmission system cannot be allowed to stop power supply under any conditions. Therefore, for example, Non-Patent Document 1 provides a current value output from the standby power supply in advance when the active power supply is stopped by maintenance inspection or the like by providing two power supplies of the active power supply and the standby power supply. A technique is disclosed in which the voltage value is matched with that of the active power supply, and then the active power supply is switched to the standby power supply and the standby power supply is switched to the active power supply.

"Power supply equipment for submarine optical transmission systems", FUJITSU DENSO REVIEW, Vol.9, No.1, 1999 (http://jp.fujitsu.com/group/ftn/downloads/review/no14/r05.pdf)

  However, in the conventional technique such as Non-Patent Document 1, in order to match the voltage value and current value output from the standby power supply with those of the active power supply, using a sliding resistor connected to the standby power supply, The user performs adjustment work while changing the resistance value. That is, since the voltage value and current value are adjusted by the user's hand, there is a problem that it takes time to switch from the working power supply to the standby power supply.

  In view of the above-described problems of the conventional technology, an object of the present invention is to provide a technology capable of matching the voltage value and current value of the standby power supply with those of the working power supply at high speed and with high accuracy.

One aspect of a power supply apparatus illustrating the present invention includes a working power source that feeds power to a repeater of a submarine transmission system and a standby power source for a working power source, the working power source as a spare power source, and the spare power source as a working power source. A power supply apparatus including a switching unit for switching to a standby power source, and when switching by the switching unit, the voltage and current values output by the standby power source coincide with the voltage and current values output by the current power source. An adjustment unit that adjusts in this manner, and a control unit that instructs adjustment by the adjustment unit and switching by the switching unit after adjustment. Further, the adjustment unit is a constant resistance electronic load, and the electronic load is output from the division unit that outputs a voltage corresponding to the ratio of the voltage at the collector electrode and the voltage at the emitter electrode of the transistor, and the division unit. And an OP amplifier that adjusts the voltage of the base electrode of the transistor and controls the resistance value between the collector electrode and the emitter electrode of the transistor by a differential operation in accordance with the applied voltage and the reference voltage .

Another aspect of the power supply apparatus exemplifying the present invention includes a working power source that feeds power to a repeater of a submarine transmission system and a spare power source for the working power source. The working power source is a spare power source, and the spare power source is a working power source. A power supply device including a switching unit for switching to a power supply, which is connected to a standby power source, and when switching by the switching unit, the voltage and current values output by the standby power source coincide with the voltage and current values output by the working power source And an adjustment unit that adjusts to adjust, and a control unit that instructs adjustment by the adjustment unit and switching by the switching unit after adjustment. Further, adjustment unit, Electronically it loads der of constant resistance, electronic load, a field effect transistor, and a division unit that outputs a voltage corresponding to the ratio of the voltage of the voltage and the source electrode of the drain electrode of the field effect transistor The voltage of the gate electrode of the field effect transistor is adjusted by the differential operation according to the voltage output from the dividing unit and the reference voltage, and the resistance value between the drain electrode and the source electrode of the field effect transistor is controlled. And an OP amplifier .

  The adjustment unit may be configured by connecting a plurality of electronic loads in series.

  In addition, a resistance element that is connected in series to the adjustment unit and reduces the voltage applied to the adjustment unit by taking part of the voltage supplied from the standby power supply may be further provided.

  According to the present invention, the voltage value and current value of the standby power supply can be matched with those of the active power supply at high speed and with high accuracy.

The figure which shows the structure of the electric power feeder 10 which concerns on one Embodiment of this invention. The figure which shows an example of the circuit structure of the electronic load 5 The figure which shows the structure of the control part 6. The flowchart which shows the control procedure of the electric power feeder 10 which concerns on one Embodiment. The figure which shows the other example of the circuit structure of the electronic load 5

  FIG. 1 shows a configuration of a power feeding apparatus 10 according to an embodiment of the present invention that feeds power to a repeater 20 of a submarine transmission system 100.

  The power supply apparatus 10 according to the present embodiment includes power sources 1a and 1b, voltmeters 2a and 2b, ammeters 3a and 3b, a switching unit 4, an electronic load 5, and a control unit 6.

  The power supplies 1a and 1b are direct current power supplies. When power is supplied to the repeater 20 of the submarine transmission system, the output voltages and supply currents of the power supplies 1a and 1b are generally ± 7000 to ± 8000V and ± 1A.

  The voltmeters 2a and 2b and the ammeters 3a and 3b measure the voltage value and current value of the power supplies 1a and 1b, respectively, and transmit the measured values to the control unit 6 described later. As the voltmeters 2a and 2b and the ammeters 3a and 3b, a general DC voltmeter and ammeter can be appropriately selected and used.

  In the switching unit 4, four switches SW1 to SW4 are connected in a bridge shape, and one of the power sources 1a and 1b is switched to an active power source that supplies power to the repeater 20, and the other is switched as a standby power source. Note that the switching operation by the switching unit 4 is performed according to an instruction from the control unit 6. As the four switches SW1 to SW4, it is preferable to appropriately select and use a vacuum relay switch or the like that is unlikely to generate a surge or the like during an ON / OFF operation.

  The electronic load 5 is connected to the standby power supply, and when the active power supply and the standby power supply are switched to each other by the switching unit 4, the voltage value and the current value output from the standby power supply match those of the active power supply. Furthermore, based on the control part 6 mentioned later, it operates like a sliding resistor and changes resistance value. Specifically, as shown in FIG. 2, the electronic load 5 is a constant resistance electronic load in this embodiment. The electronic load 5 includes a divider 30, a reference voltage source 31, an OP amplifier 32, an active element 33, and a resistance element R1. The divider 30 is a logic circuit that divides the input voltage and the output voltage from the standby power supply via the active element 33 and outputs a voltage corresponding to the division result. The reference voltage source 31 outputs a voltage that is set based on an instruction from the control unit 6 and serves as a reference voltage. The OP amplifier 32 performs a differential operation according to the output voltage of the divider 30 and the reference voltage of the reference voltage source 31, thereby generating a collector current with a base current in the case of an active element 33, for example, a transistor, and a field effect transistor (FET). ), The drain current is controlled by the gate voltage. Thereby, the resistance value in the active element 33 can be changed, and the electronic load 5 can be operated like a sliding resistor.

  The control unit 6 is a computer shown in FIG. The control unit 6 includes a CPU 61, a storage unit 62, an input / output interface (input / output I / F) 63 and a bus 64. The CPU 61, the storage unit 62 and the input / output I / F 63 can transmit information via the bus 64. Connected to. The control unit 6 is connected to an output device 65 for displaying an operation state of the power feeding device 10 and the like and an input device 66 for receiving an input from the user via the input / output I / F 63. As the output device 65, a general liquid crystal monitor, a printer, or the like can be used. As the input device 66, a keyboard, a mouse, or the like can be appropriately selected and used.

  The CPU 61 reads the control program of the power feeding device 10 stored in the storage unit 62 based on the instruction from the user received by the input device 66, and the voltmeters 2a and 2b and the ammeter 3a based on the control program. And 3b are obtained through the input / output I / F 63. Then, the CPU 61 outputs a control signal for switching the switches SW1 to SW4 of the switching unit 4 and setting the resistance value of the electronic load 5 via the input / output I / F 63 based on the measured value. A general central processing unit can be used for the CPU 61 and a storage device such as a general hard disk device or a magneto-optical disk device can be selected and used for the storage unit 62.

  Next, the control procedure of the power supply apparatus 10 according to the present embodiment will be described with reference to the flowchart of FIG. This control procedure is for switching the active power supply to the standby power supply and the standby power supply to the active power supply in order to perform maintenance and inspection of the active power supply of the power supply apparatus 10 that supplies power to the repeater 20. Suppose there is. Therefore, it is assumed that the power supply apparatus 10 is preset to the following state and supplies power to the repeater 20.

  1) Assume that the power supplies 1a and 1b are constant current power supplies (for example, ± 1A), the power supply 1a is a working power supply for supplying power to the repeater 20, and the power supply 1b is a standby power supply. Therefore, as shown in FIG. 1, it is assumed that the switches SW1 to SW4 of the switching unit 4 are set to the ON state and the switches SW2 and SW4 are set to the OFF state, respectively.

  2) The control unit 6 inputs a control program command by the user via the input device 66 or receives a start command by double-clicking the icon of the program, starts the control program, and outputs the output device 65. It is assumed that the current state of the power supply device 10 is displayed.

  In the above situation, in order to perform maintenance and inspection of the power supply 1a that is the working power supply, a command for switching the power supply 1a to the standby power supply and the power supply 1b that is the standby power supply to the working power supply by the user. Is transmitted to the CPU 61 of the control unit 6 via the input device 66. The CPU 61 receives the switching command and starts the processing from step S10 in FIG.

  Step S10: The CPU 61 of the control unit 6 acquires voltage values and current values of the power supplies 1a and 1b from the voltmeters 2a and 2b and the ammeters 3a and 3b via the input / output I / F 63.

  Step S11: The CPU 61 determines whether or not the acquired voltage value and current value of the power supplies 1a and 1b match each other. The reason for this determination is that the output voltage of each power supply is so high that when the active power supply and the standby power supply are switched to each other, power is supplied if there is any difference between the voltage value and the current value. This is because the repeater 20 malfunctions or breaks down. When the voltage value and current value of the power supplies 1a and 1b are within a predetermined error range (for example, ± 10V or less for voltage and ± 0.2% or less for current), the CPU 61 does not match each other. The process proceeds to step S12 (NO side). On the other hand, if they match, the CPU 61 proceeds to step S13 (YES side).

  Step S12: The CPU 61 calculates a resistance value that the electronic load 5 should have based on the voltage value and current value of the power source 1a acquired in step S10. The CPU 61 obtains a reference voltage value to be set in the reference voltage source 31 of the electronic load 5 in order to set the calculated resistance value in the electronic load 5. The CPU 61 sets the obtained reference voltage in the reference voltage source 31 of the electronic load 5 via the input / output I / F 63. And CPU61 transfers to step S10 and performs the process of step S10 and step S11 until the voltage value and electric current value of the power supplies 1a and 1b correspond mutually.

Step S13: Since the voltage value and current value of the power sources 1a and 1b match each other, the CPU 61 turns off the switching unit 4 to switch the power source 1a to the standby power source and the power source 1b to the working power source. A command to turn ON the switches SW2 and SW4 that are in a state is transmitted. The switching unit 4 turns on the switches SW2 and SW4 based on the received command. Step S14: The CPU 61 transmits a command to turn off the switches SW1 and SW3 to the switching unit 4. The switching unit 4 switches the power source 1a to the standby power source and the power source 1b to the working power source by turning off the switches SW1 and SW3. The CPU 61 ends the switching control of the power supply apparatus 10. As a result, a maintenance check or the like is performed on the power supply 1a that has become the standby power supply, and the power supply 1b operates as an active power supply until the next maintenance check or the like is performed.

  Thus, in this embodiment, since the resistance value of the electronic load 5 is adjusted based on the voltage value and current value of the working power supply, the voltage value between the working power supply and the standby power supply is high-speed and accurate. And the current values can be matched.

In addition, the switching operation in the situation where the power supply to the repeater 20 of the submarine transmission system is not permitted to be stopped is performed based on the control instruction by the control unit 6, so that accidents due to human error can be reduced. It is possible to improve the reliability of the transmission system.
≪Supplementary items for the embodiment≫
In the present embodiment, an electronic load having a constant resistance shown in FIG. 2 is used as the electronic load 5, but the present invention is not limited to this. For example, a constant voltage electronic load as shown in FIG. Note that the electronic load 5 in FIG. 5A divides the input voltage from the standby power supply by resistance elements R2 and R3 (resistance division). Then, the resistance value of the active element 33 is adjusted by the differential operation of the OP amplifier 32 according to the voltage at the voltage dividing point and the reference voltage of the reference voltage source 31.

  Further, as shown in FIG. 5B, the electronic load 5 may be one in which a resistance element R4 is connected to the constant resistance electronic load of FIG. 2 or the constant voltage electronic load of FIG. As a result, the voltage applied to the electronic load 5 can be reduced, and it is not necessary to use an electronic component constituting the electronic load 5 that has high voltage resistance, and the cost of the electronic load 5 can be reduced. .

  Further, as shown in FIG. 5 (c), as the electronic load 5, a plurality of constant resistance electronic loads in FIG. 2 or a constant voltage electronic load in FIG. 5 (a) may be connected in series. Thereby, the voltage concerning each electronic load 5 can be made small, and high voltage resistance can be given as a whole. Furthermore, it is not necessary to use an electronic component that constitutes the electronic load 5 having high voltage resistance, and the cost of the electronic load 5 can be reduced.

  In the present embodiment, the power supplies 1a and 1b are constant current power supplies. However, the present invention is not limited to this, and may be constant voltage power supplies.

  It should be noted that the present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be construed in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

1a, 1b power supply, 2a, 2b voltmeter, 3a, 3b ammeter, 4 switching unit, 5 electronic load, 6 control unit, 10 power supply device, 20 repeater, 100 submarine transmission system, SW1 to SW4 switch

Claims (4)

A power supply comprising an active power source for supplying power to a repeater of a submarine transmission system and a standby power source for the active power source, and a switching unit for switching the active power source to the standby power source and the standby power source to the active power source A device,
An adjustment unit that is connected to the standby power source and adjusts the voltage and current values output by the standby power source to match the voltage and current values output by the active power source when switching by the switching unit;
A control unit that instructs adjustment by the adjustment unit and switching by the switching unit after the adjustment ,
The adjustment unit is a constant resistance electronic load,
The electronic load is
A transistor,
A divider that outputs a voltage according to a ratio of a voltage at the collector electrode of the transistor to a voltage at the emitter electrode;
The differential operation according to the voltage output from the divider and the reference voltage adjusts the voltage of the base electrode of the transistor and controls the resistance value between the collector electrode and the emitter electrode of the transistor. And an OP amplifier
Feed device comprising a call. A power supply comprising an active power source for supplying power to a repeater of a submarine transmission system and a standby power source for the active power source, and a switching unit for switching the active power source to the standby power source and the standby power source to the active power source A device,
An adjustment unit that is connected to the standby power supply and adjusts the voltage and current values output by the standby power supply to match the voltage and current values output by the active power source when switching by the switching unit;
A control unit that instructs adjustment by the adjustment unit and switching by the switching unit after the adjustment,
The adjustment unit, Electronically load der of constant resistance,
The electronic load is
A field effect transistor;
A divider that outputs a voltage according to a ratio of a voltage at a drain electrode and a voltage at a source electrode of the field effect transistor;
The voltage between the drain electrode and the source electrode of the field effect transistor is adjusted by adjusting the voltage of the gate electrode of the field effect transistor by a differential operation according to the voltage output from the divider and a reference voltage. And an OP amplifier for controlling the value.
Feed device comprising a call. In the electric power feeder of Claim 1 or Claim 2,
The adjustment unit is configured by connecting a plurality of electronic loads in series. In the electric power feeder of any one of Claim 1 thru | or 3,
The series-connected to the adjustment unit, the power feeding device characterized by further Ru comprising a resistive element to reduce the voltage applied to the adjusting unit by carrying a portion of the voltage supplied from the standby power supply.

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