CN110176699B - Submarine branching device of single-core cable constant-current power supply system and use method - Google Patents
Submarine branching device of single-core cable constant-current power supply system and use method Download PDFInfo
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- CN110176699B CN110176699B CN201910547080.5A CN201910547080A CN110176699B CN 110176699 B CN110176699 B CN 110176699B CN 201910547080 A CN201910547080 A CN 201910547080A CN 110176699 B CN110176699 B CN 110176699B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000013307 optical fiber Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6691—Structural association with built-in electrical component with built-in electronic circuit with built-in signalling means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/12—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers
- H02G15/14—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers specially adapted for submarine cables
Abstract
The invention relates to a submarine branch device of a single-core cable constant-current power supply system and a use method thereof. The underwater equipment is provided with an input socket matched with the power supply plug and corresponding to the contact, the contact position of the on-off identification contact is lower, and the tail end of the input socket is communicated. The use method is that when the power supply plug is connected, the power supply plug is communicated with the power line contact of the input socket, then the on-off identification contact is connected, the on-off identification contact of the power supply plug is short-circuited, so that the controller can know the access of the underwater equipment, namely the program control switch is disconnected, the resistance of the digital potentiometer is increased, and the slow start of the underwater equipment is completed. When the underwater equipment is disconnected, the on-off identification contact is firstly separated, so that the controller knows the disconnection of the underwater equipment, the resistance value of the digital potentiometer is gradually reduced, and the program-controlled switch is turned on, so that the slow closing of the underwater equipment is completed.
Description
Technical Field
The invention relates to a load hot plug technology of a relay submarine optical cable power supply system, in particular to a submarine branching device of a single-core cable constant-current power supply system and a use method thereof.
Background
In a power supply system with a relay submarine optical cable, one common way of supplying power to submarine electrical equipment is high-voltage constant-current power supply. The submarine main cable comprises a multi-core optical fiber and a single-core cable for supplying power to underwater equipment.
The high-voltage constant-current power supply mode uses a shore-based high-voltage constant-current power supply as the anode and the cathode of two landing points of the submarine main cable, and a current loop is formed by a single-core cable of the submarine main cable and grounding. In the high-voltage constant-current power supply system, underwater electric equipment is connected to a single-core cable of a submarine main cable in a serial connection mode, electric power is obtained through potential drop, and direct-current voltage conversion equipment of each underwater equipment converts high voltage into low voltage suitable for supplying power to the underwater electric equipment.
The common underwater equipment in the power supply system with the relay submarine optical cable is generally used in the fields of optical fiber relay communication, submarine observation equipment access and the like; the underwater equipment is generally connected with the submarine main cable through the submarine branching device and the submarine branching cable, and when the underwater equipment needs to be dismantled or the submarine optical cable transmission system needs to be expanded to be increased in function and connected with the underwater equipment, the plugging operation of the underwater equipment is needed to be carried out in the submarine optical cable transmission system which is already opened to operate. In operation, if the plugging of the underwater equipment is completed after the power-off, this means that the existing subsea communication network service of the system needs to be stopped, and the cost of such power-off is not acceptable. And each underwater device is a load connected in series on the current loop of the submarine optical cable, and the underwater device is directly plugged and unplugged, so that the current loop of the submarine optical cable is instantaneously broken.
For this purpose, a subsea diverter is designed to enable hot plug of subsea equipment.
The existing submarine branching device is provided with a built-in switch facility which is in a closed state when no underwater equipment is connected, so that a submarine main cable current loop is in a connected state, and after the underwater equipment is connected, the switch is disconnected again, so that current flows through the loaded underwater equipment. When the load underwater equipment needs to be disconnected, the switch is firstly closed, so that the two ends of the branch cable are short-circuited, and then the underwater equipment is disconnected, so that the hot plug of the underwater equipment is realized. However, when the underwater equipment with power of several kilowatts is started and closed instantaneously in the plugging process, the shore-based constant-current power supply can increase or decrease the power of several kilowatts instantaneously, so that the current loop of the submarine main cable is caused to vibrate greatly, and current impact can be caused to all underwater equipment on the submarine main cable connected in series to damage the underwater equipment; meanwhile, the on-off action of a switch facility in the submarine branching device generates on-off of kilovolt voltage, and high-voltage spark is easily formed to damage underwater equipment.
Disclosure of Invention
The invention aims to provide a submarine branch device of a single-core cable constant-current power supply system, which is connected in series with a submarine main cable and comprises a controller, a digital potentiometer, a program control switch and a branch cable with a power supply plug, wherein each controller is connected in series with a control signal optical fiber of the main cable, and the controller is respectively connected with the digital potentiometer and the program control switch for controlling the submarine branch device. The digital potentiometer and the program control switch are connected in parallel and are connected in series with a single-core cable of the constant-current power supply system; the positive end and the negative end of the single-core cable are respectively connected with branch cables of which the tail ends are power supply plugs. The 1 pair of data signal lines of the power supply plug are connected with the controller. The power supply plug of the branch cable is provided with a positive power line contact, a negative power line contact and an on-off identification contact. The constant current-constant voltage power supply conversion device is provided with an input socket which is used for being connected with a submarine branching device, is matched with a power supply plug of a branching cable, and is provided with a power line contact and an on-off identification contact. The contact position of the on-off identification contact is lower than that of the power line contact, and 2 tail ends of the same pair of on-off identification contacts are communicated. When the submarine branching device is connected with underwater equipment, the program-controlled switch is in an off state, and the resistance of the digital potentiometer is the maximum value. When the submarine branch device is empty, the program-controlled switch is in a communication state, and the resistance value of the digital potentiometer is the minimum value.
The invention further aims to provide a use method of the submarine branch of the single-core cable constant-current power supply system, which is divided into a slow start condition that underwater equipment is connected on the submarine branch which is empty and a slow shut-down condition that the underwater equipment connected on the submarine branch is disconnected, when the submarine branch is connected, a power line contact of a power supply plug is firstly communicated with a power line contact of an input socket, then on-off identification contacts and contacts of the submarine branch are connected, the on-off identification contacts of the power supply plug are short-circuited, and a controller knows that the underwater equipment is connected, namely a program-controlled switch is disconnected, the resistance of a digital potentiometer is increased, and when the resistance reaches the maximum, current mainly flows through the underwater equipment to finish the slow start of the underwater equipment. When the power supply plug is disconnected, the on-off identification contact and the contact of the power supply plug and the input socket are firstly separated, the controller knows that the underwater equipment is disconnected, namely the resistance value of the digital potentiometer is gradually reduced, the current is transferred to the digital potentiometer to circulate, when the resistance value reaches the minimum, the contact of the power line contact of the power supply plug and the digital potentiometer is disconnected, the controller is connected with the program-controlled switch, and the current mainly circulates through the digital potentiometer and the program-controlled switch to finish slow closing of the underwater equipment.
The invention relates to a submarine branch of a single-core cable constant-current power supply system, which is a power cable for supplying power to underwater equipment in a submarine main cable of a submarine optical cable transmission system. And each underwater device is used as a load to be connected with the submarine branch, each underwater device is respectively provided with a constant current-constant voltage power supply conversion device, and each constant current-constant voltage power supply conversion device is connected to a single-core cable through the submarine branch to obtain electric power, thus obtaining power supply. The invention relates to a submarine branching device, which comprises a controller, a digital potentiometer, a program control switch and a branching cable with a power supply plug, wherein a pair of signal optical fibers in a submarine main cable are used as control signal optical fibers of the submarine branching device to be connected with an upper computer for controlling underwater equipment, the controllers of a plurality of submarine branching devices are connected in series with the control signal optical fibers, the controllers of all the submarine branching devices receive an upper computer instruction through the control signal optical fibers and transmit signals of the working state of the submarine branching device to the upper computer, and the signal output end of the controllers of all the submarine branching devices are connected with the digital potentiometer and the program control switch for controlling the submarine branching device through data signal wires.
The digital potentiometer and the program control switch of the submarine branching device are connected in parallel and are connected in series with a single-core cable of the constant-current power supply system; the positive end and the negative end of the single-core cable are respectively connected with a branch cable, and the tail ends of the branch cables are power supply plugs. The 1 pair of data signal lines of the power supply plug are connected with the controller. The power supply plug of the branch cable is provided with at least 1 positive and negative power line contacts respectively, and at least 1 pair of on-off identification contacts connected with the data signal line.
The constant current-constant voltage power supply conversion device of the underwater equipment is provided with an input socket which is used for being connected with the submarine branch.
The input socket is matched with a power supply plug of the branch cable, and at least 1 pair of power line contacts and 1 pair of on-off identification contacts are arranged. The contact position of the on-off identification contact is lower than that of the power line contact, and 2 tail ends of the same pair of on-off identification contacts are communicated. When the submarine branching device is empty, the power supply plug of the branching cable is not communicated with the input socket of the constant-current-constant-voltage power supply conversion device of the underwater equipment. When the unloaded subsea branch is connected to the subsea equipment, the plug of its branch cable is connected to the input socket of the subsea equipment.
The power line contact of the power supply plug of the branch cable is communicated with the power line contact of the input socket, and the on-off identification contact of the power supply plug of the second step of branch cable is communicated with the on-off identification contact of the input socket. As the tail ends of the on-off identification contacts of the input socket are communicated, once the on-off identification contacts of the power supply plug are communicated with the on-off identification contacts of the input socket, 1 pair of data signal wires connected with the on-off identification contacts of the power supply plug are connected in a short circuit mode, and the controller immediately identifies that the power supply plug is communicated with the input socket of the underwater equipment.
When the plug of the branch cable is disconnected with the input socket of the underwater equipment, the on-off identification contact of the power supply plug of the branch cable is separated from the on-off identification contact of the input socket, 1 pair of data signal wires connected with the on-off identification contact of the power supply plug are disconnected, and the controller identifies that the power supply plug disconnects the input socket; the power line contacts of the power plug of the drop cable are then disconnected from the power line contacts of the input jack.
And rated working current of the program-controlled switch is larger than or equal to working current of the constant-current power supply system.
The maximum working current of the digital potentiometer is equal to the rated working current of the constant-current power supply system, and the maximum resistance is far greater than the impedance of the underwater equipment and is generally 10 times greater than the impedance of the underwater equipment; the resistance is at least zero.
When the submarine branching device is connected with underwater equipment, the program-controlled switch is in an off state, and the resistance of the digital potentiometer is the maximum value. When the submarine branch device is empty, the program-controlled switch is in a communication state, and the resistance value of the digital potentiometer is the minimum value.
The invention relates to a use method of a submarine branch of a single-core cable constant-current power supply system, which is divided into a slow start condition that underwater equipment is connected on an empty submarine branch and a slow close condition that the underwater equipment connected on the submarine branch is disconnected, and the use method comprises the following specific steps:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch device in an operation state is unloaded, a programmable switch of the submarine branch device is in a communication state by a controller of the submarine branch device, a digital potentiometer is in a minimum resistance state, at the moment, the current of a single-core cable flows through the programmable switch of the submarine branch device and the digital potentiometer, and a power supply socket of the branch cable is not connected with an input socket of underwater equipment;
i-2, the process of connecting the power supply plug of the empty submarine branch cable with the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the submarine branch cable is firstly connected with the power line contact of the input socket, and then connected with the on-off identification contact of the input socket; after the on-off identification contact of the power supply plug is communicated with the on-off identification contact of the input socket, the tail end of the on-off identification contact of the input socket is in short circuit connection, so that 1 pair of data signal wires connected with the on-off identification contact of the power supply plug are in short circuit connection, a controller of the submarine branch device immediately identifies that the power supply plug is successfully communicated with the input socket of the underwater equipment, and the submarine branch device is completely connected with the underwater equipment; the controller uploads an access signal of the underwater equipment to the upper computer;
i-3, the upper computer gives an instruction to a controller of the submarine branching device, the controller firstly turns off a program-controlled switch, and the current of the single-core cable only flows through a digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is connected with the branching cable to obtain power supply; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed.
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact of the power supply plug of the submarine branching device is separated from the on-off identification contact of the input socket of the underwater equipment, and the power line contact of the power supply plug of the branching cable is still connected with the power line contact of the input socket, so that the underwater equipment is not powered off yet, at the moment, the 1 pair of data signal lines connected with the on-off identification contact of the power supply plug are disconnected, the controller immediately identifies that the power supply plug of the branching cable is separated from the input socket of the underwater equipment, namely the underwater equipment is disconnected, and the controller uploads a signal that the underwater equipment is disconnected to an upper computer;
the II-2 upper computer sends a command to a controller of the submarine branching device, and the controller firstly gradually reduces the resistance value of the digital potentiometer to gradually transfer the current flowing through the underwater equipment to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power supply plug of the branch cable is further separated from the power line contact of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch is completely disconnected from the underwater equipment, and the underwater equipment is disconnected from the single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
The slow starting and slow closing of the underwater equipment are used for avoiding current impact on the single-core cable constant-current power supply system, the duration time of the slow starting and slow closing is determined by the power of the underwater equipment, and the power change rate of the single-core cable constant-current power supply system is smaller than or equal to 100W/min when the single-core cable constant-current power supply system is connected or disconnected from the power supply system, so that the adjustment time of the digital potentiometer from 0 to the maximum resistance value is calculated.
The invention relates to a use method of a submarine branch device of a single-core cable constant-current power supply system, which is independent of an upper computer, wherein a controller of the submarine branch device independently completes slow start of an empty submarine branch device connected with underwater equipment and slow close of disconnection of the underwater equipment connected with the submarine branch device, and comprises the following specific steps:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch in a single-core cable constant-current power supply system in an operation state is unloaded, a programmable switch of the submarine branch is in a communication state by a controller of the submarine branch, a digital potentiometer is in a minimum resistance state, at the moment, the current of the single-core cable flows through the programmable switch of the submarine branch and the digital potentiometer, and a power supply plug of the branch cable is not connected with an input socket of underwater equipment;
i-2, the connection process of the branch cable power supply plug of the empty submarine branch device and the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the branch cable of the submarine branching device is firstly connected with the power line contact of the input socket of the submarine equipment, then is connected with the on-off identification contact of the input socket, and after the on-off identification contact of the branch cable power supply plug is connected with the on-off identification contact of the input socket, 1 pair of data signal lines connected with the on-off identification contact of the power supply plug are connected in a short circuit way, the controller immediately identifies that the branch cable power supply plug is successfully connected with the input socket of the submarine equipment, and the submarine branching device is completely connected with the submarine equipment;
i-3, the controller firstly turns off the program-controlled switch, and the current of the single-core cable only flows through the digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is communicated with the branching cable to be supplied with power; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed.
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact of the power supply plug of the branch cable is separated from the on-off identification contact of the input socket of the underwater equipment, and the power line contact of the power supply plug of the branch cable is still connected with the power line contact of the input socket of the underwater equipment, so that the underwater equipment is not powered off yet, at the moment, the 1 pair of data signal lines connected with the on-off identification contact of the power supply plug are disconnected, and the controller immediately identifies that the power supply plug of the branch cable is separated from the input socket of the underwater equipment, namely the underwater equipment is disconnected;
firstly, gradually reducing the resistance value of the digital potentiometer by the II-2 controller, so that the current flowing through the underwater equipment is gradually transferred to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power line contact of the power supply plug of the branch cable is further separated from the power line contact of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch device is completely disconnected from the input socket of the underwater equipment, and the underwater equipment is disconnected from a single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
Compared with the prior art, the submarine branch device of the single-core cable constant-current power supply system and the use method thereof have the beneficial effects that: 1. the slow start of the constant current power supply system in an operating state when the constant current power supply system is connected to the underwater equipment and the slow shut-off of the constant current power supply system when the constant current power supply system is disconnected from the underwater equipment are realized, so that the problems of broken current loop, electric spark generated by a program-controlled switch or larger current fluctuation generated by the current loop of the power supply system are avoided, the current impact on other underwater equipment connected in series with the constant current power supply system is prevented, and the working reliability of the constant current power supply system is improved; 2. the structure is simple, and the installation and the use of the existing single-core cable constant current power supply system are easy.
Drawings
FIG. 1 is a block diagram of an embodiment of a subsea branch of the single-core cable constant current power supply system;
fig. 2 is a schematic structural diagram of a power supply plug and an underwater equipment input socket of the branch cable of the submarine branch in fig. 1.
The reference numerals in the figures are:
1. the on-off identification contact comprises an on-off identification contact, a power line contact and an on-off identification contact.
Detailed Description
Submarine branch embodiment of single-core cable constant-current power supply system
The single-core cable in the embodiment is a power cable for supplying power to underwater equipment in a submarine main cable of a submarine optical cable transmission system, a plurality of submarine splitters are connected in series on the submarine main cable, and the submarine splitters are connected in series with the single-core cable through double-core branch cables, namely the double cores of the branch cables are respectively connected with the positive end and the negative end of the single-core cable. And each underwater device is used as a load to be connected with the submarine branch, each underwater device is respectively provided with a constant current-constant voltage power supply conversion device, and each constant current-constant voltage power supply conversion device is connected to a single-core cable through the submarine branch to obtain electric power, thus obtaining power supply. The structure of the submarine branching device in this embodiment is shown in fig. 1, and the submarine branching device comprises a controller, a digital potentiometer, a programmable switch and a branching cable with a power supply plug (shown by a thin solid line in fig. 1), wherein a pair of signal optical fibers (shown by a dotted line in fig. 1) in the submarine main cable are used as control signal optical fibers of the submarine branching device to be connected with an upper computer for controlling underwater equipment, the controllers of the plurality of submarine branching devices are connected in series with the control signal optical fibers, the controller of each submarine branching device receives an instruction of the upper computer through the control signal optical fibers and transmits a signal of the working state of the submarine branching device to the upper computer, and the signal output end of the controller of each submarine branching device is connected with the digital potentiometer and the programmable switch for controlling the submarine branching device through a data signal wire (shown by the thin dotted line in fig. 1).
The digital potentiometer and the program-controlled switch of each submarine branch device are connected in parallel and are connected in series with a single-core cable (shown by a thick solid line in fig. 1) of a constant-current power supply system; the positive end and the negative end of the single-core cable are respectively connected with a branch cable, and the tail ends of the branch cables are power supply plugs. The 1 pair of data signal lines of the power supply plug are connected with the controller. The power supply plug of the branch cable shown in fig. 2 is provided with 1 positive and negative power line contacts 2 respectively, and at least 1 pair of on-off identification contacts 1 connected with the data signal line.
The constant current-constant voltage power supply conversion device of the underwater equipment is provided with an input socket which is used for being connected with the submarine branch.
As shown in fig. 2, the input socket of this example is matched with a power supply plug of a branch cable, and has 1 pair of power line contacts 3 and 1 pair of on-off identification contacts 4. The contact position of the on-off identification contact 4 is lower than that of the power line contact 3, and the 2 tail ends of the same pair of on-off identification contacts 4 are communicated. When the submarine branching device is empty, the power supply plug of the branching cable is not communicated with the input socket of the constant-current-constant-voltage power supply conversion device of the underwater equipment. When the unloaded submarine branch device is connected with the underwater equipment, the power supply plug of the branch cable is connected with the input socket of the underwater equipment.
The rated working current of the routine control switch is equal to the working current of the constant current power supply system.
The maximum working current of the digital potentiometer is equal to the rated working current of the constant current power supply system, and the maximum resistance is 12 times of the impedance of the underwater equipment; the resistance is at least zero.
When the submarine branching device is connected with underwater equipment, the program-controlled switch is in an off state, and the resistance of the digital potentiometer is the maximum value. When the branching device is empty, the program-controlled switch is in a connected state, and the resistance value of the digital potentiometer is the minimum value.
Use method of submarine branch of single-core cable constant-current power supply system embodiment 1
The use method of the submarine branch device of the single-core cable constant-current power supply system in embodiment 1 is divided into a slow start condition that the submarine branch device is connected with underwater equipment in an idle state and a slow close condition that the underwater equipment connected with the submarine branch device is disconnected, and the specific steps are as follows:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch device in an operation state is unloaded, a programmable switch of the submarine branch device is in a communication state by a controller of the submarine branch device, a digital potentiometer is in a minimum resistance state, at the moment, the current of a single-core cable flows through the programmable switch of the submarine branch device and the digital potentiometer, and a power supply socket of the branch cable is not connected with an input socket of underwater equipment;
i-2, the process of connecting the power supply plug of the empty submarine branch cable with the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the submarine branch cable is firstly connected with the power line contact 3 of the input socket, and then connected with the on-off identification contact 4 of the input socket; after the on-off identification contact 1 of the power supply plug is communicated with the on-off identification contact 4 of the input socket, the tail end of the on-off identification contact 4 of the input socket is in short circuit connection, so that the data signal wires connected with the on-off identification contact 1 of the power supply plug are in short circuit connection, the controller of the submarine branch device immediately identifies that the power supply plug is successfully communicated with the input socket of the underwater equipment, and the submarine branch device is completely connected with the underwater equipment; the controller uploads an access signal of the underwater equipment to the upper computer;
i-3, the upper computer gives an instruction to a controller of the submarine branching device, the controller firstly turns off a program-controlled switch, and the current of the single-core cable only flows through a digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is connected with the branching cable to obtain power supply; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed.
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact 1 of the power supply plug of the submarine branching device branches is firstly separated from the on-off identification contact 4 of the input socket of the underwater equipment, and the power line contact 2 of the power supply plug of the branching cable is still connected with the power line contact 3 of the input socket, so that the underwater equipment is not powered off yet, at the moment, the data signal line 1 connected with the on-off identification contact 1 of the power supply plug is disconnected, the controller immediately identifies that the power supply plug of the branching cable is separated from the input socket of the underwater equipment, namely, the underwater equipment is disconnected, and the controller uploads a signal that the underwater equipment is disconnected to an upper computer;
the II-2 upper computer sends a command to a controller of the submarine branching device, and the controller firstly gradually reduces the resistance value of the digital potentiometer to gradually transfer the current flowing through the underwater equipment to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power supply plug of the branch cable is further separated from the power line contact 3 of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch is completely disconnected from the underwater equipment, and the underwater equipment is disconnected from the single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
The power change rate of the single-core cable constant-current power supply system or the power change rate of the power supply system disconnected is less than or equal to 100 watts/min, and therefore the adjustment time from 0 to the maximum resistance value of the digital potentiometer is calculated.
Use method of submarine branch of single-core cable constant-current power supply system example 2
The application method of the submarine branch of the single-core cable constant-current power supply system is independent of an upper computer, and a controller of the submarine branch independently completes slow start of the submarine branch connected with underwater equipment and slow close of disconnection of the underwater equipment connected with the submarine branch, and specifically comprises the following steps:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch in a single-core cable constant-current power supply system in an operation state is unloaded, a programmable switch of the submarine branch is in a communication state by a controller of the submarine branch, a digital potentiometer is in a minimum resistance state, at the moment, the current of the single-core cable flows through the programmable switch of the submarine branch and the digital potentiometer, and a power supply plug of the branch cable is not connected with an input socket of underwater equipment;
i-2, the connection process of the branch cable power supply plug of the empty submarine branch device and the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the branch cable of the submarine branching device is firstly connected with the power line contact of the input socket of the submarine equipment, then is connected with the on-off identification contact of the input socket, and after the on-off identification contact of the branch cable power supply plug is connected with the on-off identification contact of the input socket, 1 pair of data signal lines connected with the on-off identification contact of the power supply plug are connected in a short circuit way, the controller immediately identifies that the branch cable power supply plug is successfully connected with the input socket of the submarine equipment, and the submarine branching device is completely connected with the submarine equipment;
i-3, the controller firstly turns off the program-controlled switch, and the current of the single-core cable only flows through the digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is communicated with the branching cable to be supplied with power; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed.
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact of the power supply plug of the branch cable is separated from the on-off identification contact of the input socket of the underwater equipment, and the power line contact of the power supply plug of the branch cable is still connected with the power line contact of the input socket of the underwater equipment, so that the underwater equipment is not powered off yet, at the moment, the 1 pair of data signal lines connected with the on-off identification contact of the power supply plug are disconnected, and the controller immediately identifies that the power supply plug of the branch cable is separated from the input socket of the underwater equipment, namely the underwater equipment is disconnected;
firstly, gradually reducing the resistance value of the digital potentiometer by the II-2 controller, so that the current flowing through the underwater equipment is gradually transferred to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power line contact 2 of the power supply plug of the branch cable is further separated from the power line contact 3 of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch is completely disconnected from the input socket of the underwater equipment, and the underwater equipment is disconnected from a single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
The above embodiments are merely specific examples for further detailed description of the object, technical solution and advantageous effects of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the scope of the present disclosure are included in the scope of the present invention.
Claims (6)
1. A submarine branch device of a single-core cable constant-current power supply system, which is a power cable for supplying power to underwater equipment in a submarine main cable of a submarine optical cable transmission system, the plurality of submarine branches are connected in series on the submarine main cable, and the submarine branches are connected in series with the single-core cable through double-core branch cables, namely the double cores of the branch cables are respectively connected with the positive end and the negative end of the single-core cable; each underwater device is used as a load to be connected with a submarine branch, each underwater device is respectively provided with a constant current-constant voltage power supply conversion device, and each constant current-constant voltage power supply conversion device is connected to a single-core cable through the submarine branch to obtain electric power, so that power supply is obtained; the method is characterized in that:
the submarine branching device comprises a controller, a digital potentiometer, a program control switch and a branch cable with a power supply plug, wherein a pair of signal optical fibers in a submarine main cable are used as control signal optical fibers of the submarine branching device to be connected with an upper computer for controlling underwater equipment, the controllers of the submarine branching devices are connected in series with the control signal optical fibers, the controllers of the submarine branching devices receive an upper computer instruction through the control signal optical fibers and transmit signals of the working state of the submarine branching device to the upper computer, and the signal output end of the controller of each submarine branching device is connected with the digital potentiometer and the program control switch for controlling the submarine branching device through data signal wires;
the digital potentiometer and the program control switch of the submarine branching device are connected in parallel and are connected in series with a single-core cable of the constant-current power supply system; the positive end and the negative end of the single-core cable are respectively connected with a branch cable, and the tail ends of the branch cables are power supply plugs; the data signal lines 1 of the power supply plug are connected with the controller; the power supply plug of the branch cable is provided with at least 1 positive and negative power line contacts (2) respectively, and at least 1 pair of on-off identification contacts (1) connected with the data signal line;
an input socket used for being connected with a submarine branch is arranged on a constant-current-constant-voltage power supply conversion device configured by the underwater equipment;
the input socket is matched with a power supply plug of the branch cable, and at least 1 pair of power line contacts (3) and 1 pair of on-off identification contacts (4) are arranged; the contact position of the on-off identification contact (4) is lower than that of the power line contact (3), and 2 tail ends of the same pair of on-off identification contacts (4) are communicated; when the submarine branching device is empty, the power supply plug of the branching cable is not communicated with the input socket of the constant-current-constant-voltage power supply conversion device of the underwater equipment; when the unloaded submarine branch device is connected with the underwater equipment, a power supply plug of a branch cable of the unloaded submarine branch device is connected with an input socket of the underwater equipment;
when the submarine branching device is connected with underwater equipment, the program-controlled switch is in an off state, and the resistance value of the digital potentiometer is the maximum value; when the branching device is empty, the program-controlled switch is in a connected state, and the resistance value of the digital potentiometer is the minimum value.
2. The subsea branch of a single-core cable constant current power supply system according to claim 1, characterized in that:
the maximum working current of the digital potentiometer is equal to the rated working current of the constant-current power supply system, and the maximum resistance is 10 times greater than the impedance of the underwater equipment; the resistance is at least zero.
3. The subsea branch of a single-core cable constant current power supply system according to claim 1, characterized in that:
and rated working current of the program-controlled switch is larger than or equal to working current of the constant-current power supply system.
4. A method of using a subsea branch of a single-cable constant current power supply system according to any one of claims 1 to 3, characterized by:
the method is divided into a slow start condition of an access load on an unloaded branch device and a slow shut condition of a disconnection of the access load on the branch device, and comprises the following specific steps:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch device in an operation state is unloaded, a programmable switch of the submarine branch device is in a communication state by a controller of the submarine branch device, a digital potentiometer is in a minimum resistance state, at the moment, the current of a single-core cable flows through the programmable switch of the submarine branch device and the digital potentiometer, and a power supply socket of the branch cable is not connected with an input socket of underwater equipment;
i-2, the process of connecting the power supply plug of the empty submarine branch cable with the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the submarine branch cable is firstly connected with the power line contact (3) of the input socket, and then connected with the on-off identification contact (4) of the input socket; after the on-off identification contact (1) of the power supply plug is communicated with the on-off identification contact (4) of the input socket, 1 pair of data signal wires connected with the on-off identification contact (1) of the power supply plug are connected in a short circuit manner, a controller of the submarine branch device immediately identifies that the power supply plug is successfully communicated with the input socket of the underwater equipment, and the submarine branch device is completely connected with the underwater equipment; the controller uploads an access signal of the underwater equipment to the upper computer;
i-3, the upper computer gives an instruction to a controller of the submarine branching device, the controller firstly turns off a program-controlled switch, and the current of the single-core cable only flows through a digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is connected with the branching cable to obtain power supply; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed;
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact (1) of the power supply plug of the submarine branching device is separated from the on-off identification contact (4) of the input socket of the underwater equipment, the power line contact (2) of the power supply plug of the branching cable is still connected with the power line contact (3) of the input socket, at the moment, the data signal line (1) connected with the on-off identification contact (1) of the power supply plug is disconnected, the controller immediately identifies that the power supply plug of the branching cable is separated from the input socket of the underwater equipment, namely the underwater equipment is disconnected, and the controller uploads the signal of the disconnection of the underwater equipment to the upper computer;
the II-2 upper computer sends a command to a controller of the submarine branching device, and the controller firstly gradually reduces the resistance value of the digital potentiometer to gradually transfer the current flowing through the underwater equipment to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power supply plug of the branch cable is further separated from the power line contact (3) of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch is completely disconnected from the underwater equipment, and the underwater equipment is disconnected from the single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
5. The method for using the submarine branch device of the single-core cable constant-current power supply system according to claim 4, wherein the method comprises the following steps:
the power change rate of the single-core cable constant-current power supply system is smaller than or equal to 100W/min, and the adjustment time from 0 to the maximum resistance value of the digital potentiometer is calculated.
6. A method of using a subsea branch of a single-cable constant current power supply system according to any one of claims 1 to 3, characterized by:
the controller of the submarine branch device independently completes the slow start of the unloaded submarine branch device to the underwater equipment and the slow close of the disconnection of the underwater equipment connected to the submarine branch device, and the specific steps are as follows:
i, accessing no-load submarine branch device into underwater equipment
I-1, a certain submarine branch in a single-core cable constant-current power supply system in an operation state is unloaded, a programmable switch of the submarine branch is in a communication state by a controller of the submarine branch, a digital potentiometer is in a minimum resistance state, at the moment, the current of the single-core cable flows through the programmable switch of the submarine branch and the digital potentiometer, and a power supply plug of the branch cable is not connected with an input socket of underwater equipment;
i-2, the connection process of the branch cable power supply plug of the empty submarine branch device and the input socket of the constant current-constant voltage power supply conversion device of the underwater equipment is as follows: the power supply plug of the branch cable of the submarine branching device is firstly connected with the power line contact (3) of the input socket of the submarine equipment, then is connected with the on-off identification contact (4) of the input socket, after the on-off identification contact (1) of the branch cable power supply plug is communicated with the on-off identification contact (4) of the input socket, 1 pair of data signal lines connected with the on-off identification contact (1) of the power supply plug are connected in a short circuit manner, the controller immediately identifies that the branch cable power supply plug is successfully communicated with the input socket of the submarine equipment, and the submarine branching device is completely connected with the submarine equipment;
i-3, the controller firstly turns off the program-controlled switch, and the current of the single-core cable only flows through the digital potentiometer; the controller gradually increases the resistance of the digital potentiometer, along with the increase of the resistance of the digital potentiometer, the current flowing through the digital potentiometer is gradually transferred to the parallel underwater equipment, and the underwater equipment connected with the submarine branching device is communicated with the branching cable to be supplied with power; when the resistance of the digital potentiometer reaches the maximum, the current mainly flows through the underwater equipment, so that the slow start of the underwater equipment is completed;
II disconnection of underwater equipment connected to a subsea branch
II-1, the underwater equipment on a certain submarine branch in the single-core cable constant-current power supply system in an operating state is ready to be disconnected, and the disconnection process is as follows: the on-off identification contact (1) of the power supply plug of the branch cable is separated from the on-off identification contact (4) of the input socket of the underwater equipment, the power line contact (2) of the power supply plug of the branch cable is still connected with the power line contact (3) of the input socket of the underwater equipment, at the moment, the data signal line (1) connected with the on-off identification contact (1) of the power supply plug is disconnected, and the controller immediately identifies that the power supply plug of the branch cable is separated from the input socket of the underwater equipment, namely the underwater equipment is disconnected;
firstly, gradually reducing the resistance value of the digital potentiometer by the II-2 controller, so that the current flowing through the underwater equipment is gradually transferred to the digital potentiometer connected in parallel;
II-3, when the resistance value of the digital potentiometer is minimum, the current of the branch cable mainly flows through the digital potentiometer, and meanwhile, the power line contact of the power supply plug of the branch cable is further separated from the power line contact (3) of the input socket of the underwater equipment, namely, the power supply plug of the branch cable of the submarine branch is completely disconnected from the input socket of the underwater equipment, and the underwater equipment is disconnected from the single-core cable of the constant-current power supply system; at the moment, the controller closes the program-controlled switch, and the current of the single-core cable flows through the program-controlled switch of the submarine branch device and the digital potentiometer to finish slow closing of the underwater equipment.
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