Submarine branch device and control method for submarine branch device

Abstract

To provide a submarine branch device that restarts and resets a power supply changeover control circuit without stopping the system.SOLUTION: There is provided a submarine branch device that comprises: a power supply changeover control circuit which converts an optical command signal for relay changeover into an electric signal; a relay drive circuit which is connected to the power supply changeover control circuit and receives the electric signal to change a power supply line; and an automatic reset circuit which is connected to the power supply changeover control circuit and receives the electric signal to reset the power supply changeover control circuit. Here, the automatic reset circuit is connected to the power supply changeover control circuit through a first time constant circuit which delays the electric signal.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a submarine branching unit and a method for controlling a submarine branching unit. [Background technology]

[0002] A power feed switching method, a power feed line branching device, and a power feed switching system that can perform power feed line switching in a stable power feed line system and eliminate restrictions on the point where the power feed line is switched are disclosed in Patent Document 1. The connection configuration of the power feed line at the branching point of a submarine cable transmission line that communicates using optical fiber is controlled based on a control signal superimposed on an optical signal transmitted by the optical fiber, and the power feed line is switched. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-57607 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the power feed line branching device described in Patent Document 1 is a circuit that is activated when a fault occurs in the power feed line, and does not prevent the fault from occurring. Therefore, the object of the present disclosure is to provide a submarine branching device that restarts and resets the power feed switching control circuit without stopping the system. [Means for solving the problem]

[0005] The submarine branching unit of the present disclosure comprises: a power supply switching control circuit that converts an optical command signal for switching the relay into an electrical signal; a relay drive circuit connected to the power supply switching control circuit and configured to receive the electrical signal and change the power supply path; an automatic reset circuit connected to the power supply switching control circuit and configured to receive the electrical signal and reset the power supply switching control circuit.

[0006] The method for controlling a submarine branching unit according to the present disclosure includes: The power supply switching control circuit converts the optical command signal for switching the relay into an electrical signal, receiving the electrical signal and changing the power supply path; The submarine branching unit control method includes receiving the electrical signal and resetting the power supply switching control circuit. Effect of the Invention

[0007] The present disclosure provides a submarine branching unit that restarts and resets a power supply switching control circuit without stopping the system. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a circuit diagram of a related submarine branching unit. [Diagram 2] FIG. 2 is a circuit diagram of a submarine branching unit of the present disclosure. [Diagram 3] 1 is a first circuit diagram showing a control method for a submarine branching unit according to the present disclosure. FIG. [Figure 4] FIG. 11 is a second circuit diagram showing a control method for a submarine branching unit according to the present disclosure. [Diagram 5] FIG. 11 is a third circuit diagram showing a control method for a submarine branching unit according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the invention according to the claims is not limited to the following embodiment. Furthermore, not all of the configurations described in the embodiment are necessarily essential as means for solving the problem. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and repeated explanations are omitted as necessary.

[0010] (Description of the Submarine Branching Device According to the Embodiment) Fig. 1 is a circuit diagram of a related submarine branching device. Fig. 2 is a circuit diagram of a submarine branching device of the present disclosure. The description will be given with reference to Fig. 1 and Fig. 2. The submarine branching device is a device arranged on the seabed to communicate between base stations using optical fibers, and includes a device for switching power supply paths.

[0011] The submarine branching unit is equipped with a control circuit for controlling a relay which is a switch of a power supply path. As shown in Fig. 1, the submarine branching unit 100 includes a power supply switching control circuit 101, a first power line 102, a second power line 103, and a relay driving circuit 106 including a relay 107.

[0012] When the power supply switching control circuit 101 receives an optical command signal 104 from the outside, it outputs an electric signal 105. By inputting this electric signal 105 to a relay driving circuit 106, a relay 107 is driven to switch the power supply path.

[0013] If the power supply switching control circuit 101 were to freeze or perform other abnormal operations on the seabed for some reason, power supply switching would be impossible because the electric signal 105 for driving the relay would not be issued even if an optical command signal 104 was sent to the power supply switching control circuit 101. If this state continues for a long time, there is a risk that the submarine branching unit 100 will be damaged.

[0014] In order to escape from a state where power supply switching is not possible, in the current design, it is necessary to restart the power supply switching control circuit 101 by shutting down the power supply to the submarine branching unit 100 and then restarting it. This means that the power supply and operation of the entire system must be temporarily stopped. For this reason, it has been desired to equip the system with a function that can restart only the power supply switching control circuit 101 without stopping the operation of the system, in preparation for the unlikely event of abnormal operation.

[0015] 2, the submarine branching unit 200 of the present disclosure includes a power supply switching control circuit 201, a first power line 202, a second power line 203, a relay driving circuit 206 including a relay 207, and an automatic reset circuit 210. The submarine branching unit 200 further includes a first time constant circuit 208 and a second time constant circuit 209.

[0016] The power supply switching control circuit 201 converts an optical command signal 204 for switching the relay into an electrical signal 205. The power supply switching control circuit 201 is connected to a first power supply line 202 and a second power supply line 203, and a power supply current flows through the power supply switching control circuit 201.

[0017] The relay drive circuit 206 is connected to the power supply switching control circuit 201. The relay drive circuit 206 includes a relay 207 that receives an electric signal 205 from the power supply switching control circuit 201 and changes the power supply path.

[0018] The automatic reset circuit 210 is connected to the power supply switching control circuit 201. The automatic reset circuit 210 receives an electrical signal 205 from the power supply switching control circuit 201 to reset the power supply switching control circuit 201. The automatic reset circuit 210 is composed of a switch between the first power supply line 202 and the second power supply line 203. The automatic reset circuit 210 resets the power supply switching control circuit 201 by shorting the first power supply line 202 and the second power supply line 203.

[0019] The automatic reset circuit 210 is connected to the power supply switching control circuit 201 via a first time constant circuit 208, which delays the electrical signal 205. The automatic reset circuit 210 is connected to the power supply switching control circuit 201 via a second time constant circuit 209, which maintains the reset state.

[0020] After being reset, the power supply switching control circuit 201 returns to normal operation by energizing the first power supply line 202 and the second power supply line 203.

[0021] In this way, an automatic reset circuit 210 is provided that has a function of forcibly turning on / off only the power supply switching control circuit 201 while keeping power supplied to the submarine branching unit 200. This makes it possible to restart and reset the power supply switching control circuit 201 without stopping the system, thereby eliminating abnormal operation.

[0022] The automatic reset circuit 210 has the following requirements 1 to 3. 1. The automatic reset circuit is operated in conjunction with the relay switching. Abnormal operations such as freezing are unlikely to occur suddenly in normal steady state, and if they do occur, they are likely to occur in a transient state such as when switching the power supply. 2. After the relay switching is completely completed, the power supply switching control circuit 201 is turned off. If the power supply is turned off first, the relay cannot be switched. 3. After the transient state during power supply switching has settled into a steady state, the power supply switching control circuit 201 is turned on. If the power supply is turned on during the transient state, the power supply switching control circuit 201 may operate abnormally due to the transient phenomenon, making the resetting operation meaningless.

[0023] For this reason, the automatic reset circuit 210 is connected in parallel with the power supply switching control circuit 201. First, to realize requirement 1, the signal for driving the relay 207 is branched and input to the automatic reset circuit 210 as well. This makes it possible to drive the automatic reset circuit 210 using the relay switching as a trigger. Next, to realize requirements 2 and 3, two time constant circuits are connected in association with the automatic reset circuit 210 to adjust the power on / off timing of the control circuit.

[0024] (Description of a method for controlling a submarine branching unit according to an embodiment) Fig. 3 is a first circuit diagram showing a method for controlling a submarine branching unit according to the present disclosure. Fig. 4 is a second circuit diagram showing a method for controlling a submarine branching unit according to the present disclosure. Fig. 5 is a third circuit diagram showing a method for controlling a submarine branching unit according to the present disclosure. Description will be made with reference to Figs. 3 to 5.

[0025] 3, relay 207 is switched by electrical signal 205 from power supply switching control circuit 201. At this time, a first time constant circuit 208 delays the input of electrical signal 205 to automatic reset circuit 210 to allow time to pass so that automatic reset circuit 210 is not activated before relay 207 is switched.

[0026] As shown in Fig. 4, after the relay switching is completed, the electric signal 205 delayed by the first time constant circuit 208 is input to the automatic reset circuit 210. The automatic reset circuit 210 uses the electric signal 205 as a trigger to short-circuit the first power line 202, which is the positive pole of the power supply switching control circuit 201, and the second power line 203, which is the negative pole. The power supply switching control circuit 201 is turned off by drawing the current that is normally supplied to the power supply switching control circuit 201 into the automatic reset circuit 210. The short-circuiting of the first power line 202 and the second power line 203 generates a reset state in the power supply switching control circuit 201. The short-circuit state is maintained for a certain period of time by the second time constant circuit 209 during the transient state immediately after the power supply switching.

[0027] As shown in FIG. 5, after the transient state settles into a steady state, the short circuit is removed and the power supply switching control circuit 201 is restored to its normal state.

[0028] The automatic reset circuit 210 has the function of momentarily shutting down and restarting only the power supply switching control circuit 201. This makes it possible to restart the power supply switching control circuit without causing a system failure such as a communication interruption, and prevents events such as the inability to switch power supplies due to abnormal operation of the power supply switching control circuit.

[0029] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-mentioned embodiments. Various modifications that can be understood by a person skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be appropriately combined with other embodiments.

[0030] A part or all of the above-described embodiments can be described as follows, but is not limited to the following. (Appendix 1) a power supply switching control circuit that converts an optical command signal for switching the relay into an electrical signal; a relay drive circuit connected to the power supply switching control circuit and configured to receive the electrical signal and change the power supply path; an automatic reset circuit connected to the power supply switching control circuit and configured to receive the electrical signal and reset the power supply switching control circuit. (Appendix 2) The submarine branching device described in Appendix 1, wherein the automatic reset circuit is connected to the power supply switching control circuit via a first time constant circuit that delays the electrical signal. (Appendix 3) The submarine branching device described in Appendix 1, wherein the automatic reset circuit is connected to the power supply switching control circuit via a second time constant circuit that maintains the reset state. (Appendix 4) the power supply switching circuit is connected to a first power supply line and a second power supply line; the automatic reset circuit is connected to the first power supply line and the second power supply line; 2. The submarine branching device according to claim 1, wherein the automatic reset circuit resets the power supply switching circuit by shorting the first power line and the second power line. (Appendix 5) 5. The submarine branching device according to claim 4, wherein after the power supply switching circuit is reset, power is applied between the first power line and the second power line. (Appendix 6) The power supply switching control circuit converts the optical command signal for switching the relay into an electrical signal, receiving the electrical signal and changing the power supply path; A submarine branching unit control method comprising receiving the electrical signal and resetting the power supply switching control circuit. (Appendix 7) 7. The method for controlling a submarine branching unit according to claim 6, wherein a time elapses from when the power supply path is changed until when the power supply switching control circuit is reset. (Appendix 8) 7. The method for controlling a submarine branching unit according to claim 6, wherein the reset state is maintained for a certain period of time. (Appendix 9) 7. The method for controlling a submarine branching unit according to claim 6, wherein the reset state occurs when a first power line and a second power line connected to the power supply switching circuit are shorted. (Appendix 10) 10. The method for controlling a submarine branching unit according to claim 9, wherein after the power supply switching circuit is reset, power is applied between the first power line and the second power line. [Explanation of symbols]

[0031] 100 Submarine branching unit, 101 Power supply switching control circuit, 102 First power line, 103 Second power line, 104 Optical command signal, 105 Electric signal, 106 Relay driving circuit, 107 Relay, 200 Submarine branching unit, 201 Power supply switching control circuit, 202 First power line, 203 Second power line, 204 Optical command signal, 205 Electric signal, 206 Relay driving circuit, 207 Relay, 208 First time constant circuit, 209 Second time constant circuit, 210 Automatic reset circuit

Claims

1. a power supply switching control circuit that converts an optical command signal for switching the relay into an electrical signal; a relay drive circuit connected to the power supply switching control circuit and configured to receive the electrical signal and change the power supply path; an automatic reset circuit connected to the power supply switching control circuit and configured to receive the electrical signal and reset the power supply switching control circuit.

2. 2. The submarine branching unit according to claim 1, wherein the automatic reset circuit is connected to the power supply switching control circuit via a first time constant circuit that delays the electrical signal.

3. 2. The submarine branching unit according to claim 1, wherein the automatic reset circuit is connected to the power supply switching control circuit via a second time constant circuit that maintains the reset state.

4. the power supply switching circuit is connected to a first power supply line and a second power supply line; the automatic reset circuit is connected to the first power supply line and the second power supply line; 2. The submarine branching unit according to claim 1, wherein said automatic reset circuit resets said power supply switching circuit by shorting said first power line and said second power line.

5. 5. The submarine branching unit according to claim 4, wherein, after the power supply switching circuit is reset, power is applied between the first power line and the second power line.

6. The power supply switching control circuit converts the optical command signal for switching the relay into an electrical signal, receiving the electrical signal and changing the power supply path; A submarine branching unit control method comprising receiving the electrical signal and resetting the power supply switching control circuit.

7. 7. The method for controlling a submarine branching unit according to claim 6, wherein a time elapses from when the power feed path is changed until when the power feed switching control circuit is reset.

8. 7. The method for controlling a submarine branching unit according to claim 6, wherein said reset state is maintained for a fixed period of time.

9. 7. The method for controlling a submarine branching unit according to claim 6, wherein the reset state occurs when a first power line and a second power line connected to the power supply switching circuit are shorted.

10. 10. The method for controlling a submarine branching unit according to claim 9, wherein, after the power supply switching circuit is reset, power is applied between the first power line and the second power line.

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