CN219039256U - Submarine cable fault positioning system based on underwater beacon - Google Patents
Submarine cable fault positioning system based on underwater beacon Download PDFInfo
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- CN219039256U CN219039256U CN202320088472.1U CN202320088472U CN219039256U CN 219039256 U CN219039256 U CN 219039256U CN 202320088472 U CN202320088472 U CN 202320088472U CN 219039256 U CN219039256 U CN 219039256U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model relates to a submarine cable fault positioning system based on an underwater beacon, which comprises a head end grounding box, a current transformer, an underwater beacon, an anti-pressing box, a tail end grounding box, a current collector and a pulse signal receiver, wherein the head end grounding box is connected with the current transformer; the head end grounding box and the tail end grounding box are respectively connected with the head end and the tail end of the submarine cable, the head end grounding box is connected with a ground substation or ground communication equipment, and the tail end grounding box is connected with a ground cable of an offshore platform; a current transformer is respectively arranged on the three-phase power lines close to the head end of the submarine cable, and the current transformer is connected with a current collector; a plurality of pressure-proof boxes are arranged on the submarine cable at intervals, an underwater beacon is inserted into each pressure-proof box, the underwater beacon is electrified to send pulse signals to a pulse signal receiver, and the pulse signal receiver transmits the pulse signals to an upper computer; the pressure-proof box is internally provided with an induction energy-taking module and a chemical battery, the induction energy-taking module supplies power for the underwater beacon when the cable is normal, and the chemical battery supplies power for the underwater beacon when the cable fails. The fault position is accurately positioned by a mode that the current transformer and the underwater positioning beacon work cooperatively.
Description
Technical Field
The utility model belongs to the technical field of submarine cable fault detection, and particularly relates to a submarine cable fault positioning system based on an underwater beacon.
Background
With the rapid development of submarine cable technology, submarine cables are increasingly widely applied and mainly used for transmitting electric energy and optical fiber communication. However, the working environment of the submarine cable is complex, on one hand, as the water displacement of the ship is larger and larger, the large ship anchor can often reach the depth of the submarine cable when being lowered and moored, and the submarine cable is easily broken when being anchored by a winch; on the other hand, with the increasing depth of submarine cable laying, submarine cables are subjected to larger pressure and faster seawater corrosion, and the submarine cables are also subject to sediment abrasion and damage due to free hanging fatigue. Once the cable fails, the loss caused is huge, so that the quick operation and maintenance of the submarine cable can be realized by timely positioning the failure position.
In marine environment, there is the degree of difficulty in the fault location of submarine cable, and some of prior art are to utilize the acoustic wave appearance to survey the cable, look for the fault location through the acoustic wave feedback, but the acoustic wave appearance needs to carry on inspection robot, and the positioning accuracy depends on the accuracy of inspection robot inspection route, still increases positioner's complexity simultaneously. Still other fault localization by fault detectors, but fault detectors can only determine the approximate extent of a fault, a specific location requiring localization by an underwater vehicle.
In conclusion, the problems of inaccurate fault positioning, complex positioning device and the like exist in the prior art, so the submarine cable fault positioning system based on the underwater beacon is simple in structure, and rapid detection is realized while accurate positioning is performed.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a submarine cable fault positioning system based on an underwater beacon.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a submarine cable fault positioning system based on an underwater beacon comprises a head end grounding box, a current transformer, an underwater beacon, an anti-voltage box, a tail end grounding box, a current collector and a pulse signal receiver;
the head end grounding box and the tail end grounding box are respectively connected with the head end and the tail end of the submarine cable, the head end grounding box is connected with a ground substation or ground communication equipment, and the tail end grounding box is connected with a ground cable of an offshore platform; a current transformer is respectively arranged on the three-phase power lines close to the head end of the submarine cable, a current collector is positioned in the head end grounding box, and the current collector is connected with the current transformer and simultaneously performs data transmission with an upper computer;
a plurality of pressure-proof boxes are arranged on the submarine cable at intervals, an underwater beacon is inserted into each pressure-proof box, the underwater beacon is electrified to send pulse signals to a pulse signal receiver arranged on an offshore platform, and the pulse signal receiver transmits the pulse signals to an upper computer; the pressure-proof box is internally provided with an induction energy-taking module and a chemical battery, the induction energy-taking module supplies power for the underwater beacon when the submarine cable fails, and the chemical battery supplies power for the underwater beacon when the submarine cable fails.
Further, the underwater beacon comprises a pressure-proof shell, a sealing shell and a pulse signal transmitting chip; one end of the pressure-proof shell is connected with one end of the sealing shell, the other end of the sealing shell is inserted into the pressure-proof box, and the pulse signal transmitting chip is embedded into the pressure-proof shell and the sealing shell.
Further, the induction energy taking module comprises an electromagnetic iron core, an induction coil, a rectifying circuit, a filter circuit, a voltage stabilizing circuit and a control chip; the induction coil is embedded in the pressure-proof box, and the electromagnetic iron core is positioned at the center of the induction coil; the rectification circuit, the filter circuit, the voltage stabilizing circuit and the control chip are integrated on a circuit board, and the circuit board is arranged in the voltage-proof box; the induction voltage generated by the induction coil is rectified, filtered and stabilized to supply power for the underwater beacon; the control chip is used for controlling the induction energy taking module or the chemical battery to supply power for the underwater beacon.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the utility model, the fault position is accurately positioned in a mode of cooperative work of the three-phase current transformer and the underwater positioning beacon; the three-phase current collected by the three-phase current transformer is used for judging whether the submarine cable fails or not, and the position of the underwater beacon is determined according to the change of the frequency of the pulse signal sent by the underwater beacon, so that the failure position is determined, and information is provided for operation and maintenance. In addition, the position of the submarine cable can be positioned according to the transmitting position of the pulse signal.
(2) When the submarine cable breaks down, the upper computer can send out early warning, so that the ground transformer station or ground communication equipment can reduce the energy output power, and the damage degree of the three-phase wire core of the submarine cable can be reduced.
Drawings
FIG. 1 is an overall block diagram of the present utility model;
FIG. 2 is an internal block diagram of an underwater beacon;
FIG. 3 is a schematic view of the interior of the front end of the anti-crush slot;
in the figure, a 1-head end grounding box; 2-a current transformer; 3-underwater beacons; 4-a pressure-proof box; 5-terminal earth box; 6-wire hoops;
301-a pressure-proof shell; 302-a sealed housing; 303-a pulse signal transmitting chip; 401-electromagnetic iron core; 402-electromagnetic coil.
Detailed Description
The following describes the technical scheme of the present utility model in detail with reference to the drawings and the specific embodiments, but does not limit the protection scope of the present application.
The utility model relates to a submarine cable fault positioning system based on an underwater beacon, which comprises a head end grounding box 1, a current transformer 2, an underwater beacon 3, a pressure-proof box 4, a tail end grounding box 5, a current collector (not shown in the figure) and a pulse signal receiver (not shown in the figure);
the head-end grounding box 1 and the tail-end grounding box 5 are respectively connected with the head end and the tail end of the submarine cable, the head-end grounding box 1 is positioned on the coast, and meanwhile, the head-end grounding box 1 is connected with a ground transformer substation or ground communication equipment and is used for realizing the connection of the ground transformer substation or the ground communication equipment and the submarine cable; the terminal grounding box 5 is positioned on the offshore platform, and meanwhile, the terminal grounding box 5 is connected with a ground cable of the offshore platform and is used for realizing the connection between the ground cable of the offshore platform and a submarine cable; a current transformer 2 is respectively arranged on the three-phase power lines close to the head end of the submarine cable, the current collectors are positioned in the head end grounding box 1, the current collectors are connected with the current transformer 2, the current transformer 2 collects three-phase currents of the submarine cable and transmits the three-phase currents to the current collectors, the current collectors convert analog signals of the three-phase currents into digital signals and then transmit the digital signals to an upper computer in a wireless mode, and when three-phase unbalanced currents occur, namely the three-phase currents exceed a threshold value, the submarine cable is indicated to be faulty;
a plurality of anti-compression boxes 4 are arranged on the submarine cable at intervals through wire hoops 6, and an underwater beacon 3 is inserted into each anti-compression box 4; the pressure-proof box 4 is internally provided with an induction energy-taking module and a chemical battery which are used for supplying power to the underwater beacon 3, and the induction energy-taking module obtains induction voltage according to electromagnetic induction when the submarine cable fails to supply power to the underwater beacon 3; when the submarine cable fails, a chemical battery supplies power for the underwater beacon 3; the underwater beacon 3 can send pulse signals to a pulse signal receiver arranged on an offshore platform after being electrified, and the pulse signal receiver modulates the pulse signals and then wirelessly transmits the modulated pulse signals to an upper computer; because the frequency of the pulse signals sent by the underwater beacon 3 in the two power supply modes is different, the upper computer can lock the position of the underwater beacon 3 according to the different frequencies of the pulse signals, and then fault positioning is realized.
The underwater beacon 3 comprises a pressure-proof shell 301, a sealing shell 302 and a pulse signal transmitting chip 303; one end of the pressure-proof shell 301 is connected with one end of the sealing shell 302, the pulse signal transmitting chip 303 is embedded in the pressure-proof shell 301 and the sealing shell 302, and the other end of the sealing shell 302 is inserted in the pressure-proof box 4, so that most of the underwater beacon 3 is positioned outside the pressure-proof box 4, and the attenuation rate of the transmitted pulse signal can be effectively reduced; the pressure-proof shell 301 is used for blocking impact force of seawater on the underwater beacon 3 and guaranteeing sensitivity of the pulse signal transmitting chip 303; the sealed housing 302 serves to prevent seawater from entering the interior of the underwater beacon 3 and corrosion, providing a dry sealed packaging environment for the pulse signal transmitting chip 303.
The induction energy taking module comprises an electromagnetic iron core 401, an induction coil 402, a rectifying circuit, a filter circuit, a voltage stabilizing circuit and a control chip; the induction coil 402 is embedded in the anti-compression box 4, the electromagnetic iron core 401 is positioned at the center of the induction coil 402, and the electromagnetic iron core 401 plays a role in magnetic focusing; the rectification circuit, the filter circuit, the voltage stabilizing circuit and the control chip are integrated on a PCB (printed circuit board), and the PCB is arranged in the voltage-proof box 4; the rectifying circuit, the filtering circuit and the voltage stabilizing circuit are all conventional circuits in the field, and are not described herein. Because alternating magnetic fields exist around the submarine cable, induced voltage is generated in the induction coil 402 according to the electromagnetic induction principle, and the induced voltage is rectified, filtered and stabilized to supply power to the underwater beacon 3, the underwater beacon 3 is provided with two power supply branches, one power supply branch is connected with a chemical battery, the other power supply branch is connected with an induction energy taking module, the two power supply branches are provided with switches, the on-off of the switches is controlled through a control chip, and the corresponding power supply branches are further controlled to be connected. When the submarine cable does not fail, the induction voltage generated by the induction coil 402 is the standard voltage (the power supply voltage of the underwater beacon) and is used for supplying power to the underwater beacon 3, and the pulse signal transmitting chip 303 transmits a pulse signal with a specific frequency to the pulse signal receiver; when the submarine cable fails, the surrounding alternating magnetic field is unstable, the induced voltage formed on the induction coil 402 is difficult to reach the standard voltage, and the underwater beacon 3 is difficult to supply power, so that the pulse signal transmitting chip 303 transmits a pulse signal with another frequency to the pulse signal receiver through the power supply of a chemical battery; the pulse signal transmitting chip 303 transmits different pulse signals in two power supply modes, so that the position of the underwater beacon 3 transmitting the pulse signals with different frequencies can be rapidly locked according to the different pulse signals, and the fault position can be further determined.
The submarine cable is used for transmitting electric energy and communication, and comprises a wire core, a metal sheath, an inner sheath and an outer sheath from inside to outside in sequence, when the submarine cable has faults including single-phase short circuit, two-phase grounding short circuit and three-phase short circuit, the current collected by the current transformer of the corresponding phase can far exceed a threshold value, and the upper computer can prompt the fault; in the process of transmitting electric energy and communication by the submarine cable, leakage current can occur in the inner sheath of the submarine cable, and when no fault occurs, the leakage current of the inner sheath is smaller, and as the submarine cable is mostly transmitted in a long distance, the capacitive current is far greater than the inductive current, so the capacitive current of the inner sheath is used as an index of normal transmission of a circuit, and the capacitive current is used as a reference of normal transmission of the circuit
w is angular frequency, C is core capacitance, U i Is a phase voltage; when a fault occurs, leakage current increases sharply, and the leakage current exceeds a normal threshold.
The service life of the system is not only related to the service life of the device, but also related to the marine environment coefficient xi e Related to marine environment coefficient xi e Is positively correlated with marine pollutant concentration, marine sediment quality index and marine habitat biological index, in particular
Wherein a is i Represents the concentration of the ith marine pollutant, A i Represents the standard concentration of the I-th marine pollutant, I represents the type of the marine pollutant, and oc represents the correlation, S QI Represents the quality index of the seabed sediment, S BI Representing marine habitat biological index. The marine pollutants can directly influence the protective layer on the surface of the submarine cable, so that the service life of the system is further influenced, the submarine sediment can be accumulated on the surface of the submarine cable, and the load of the submarine cable is increased; the secretion of marine habitat is corrosive, so that cables can be corroded, and the service life of the system is further influenced; therefore, when the system is deployed, the marine environment is fully considered, a high pollution area is avoided, the cable length with enough margin is reserved, and too much seabed sediment is prevented from being attached to the surface of the cable to reduce the mechanical strength of the cable core; the depth of sinking of the cable needs to be controlled when the cable is routed, so that the influence of marine habitat organisms is reduced, and the deeper the sinking is, the less the marine habitat organisms are.
Because the submarine cable is provided with a plurality of underwater beacons 3 at intervals, the routing position of the whole submarine cable length can be obtained according to the position where the pulse signal is sent, and the routing refers to the route through which the submarine cable passes; when the passing ship is encountered, the intensity of the pulse signal is attenuated, and the intensity of the pulse signal received by the upper computer is lower than a normal value, so that the upper computer can send a warning signal to the passing ship to remind the passing ship to prohibit anchoring; in addition, the ocean current change can cause the submarine cable position to change, so that the position of the submarine beacon 3 for sending out the pulse signal can change, the position of the submarine cable can be known, and the submarine cable is positioned.
The working principle and the working flow of the utility model are as follows:
the whole system realizes the accurate positioning of faults through the cooperative work of the three-phase current transformer and the underwater beacon; on one hand, leakage current can occur in the inner protective layer of the submarine cable due to high voltage, the leakage current is in a normal threshold range when no fault occurs, the outer protective layer of the submarine cable is broken when the fault occurs, the leakage current is increased sharply and exceeds a normal threshold value, and then three-phase unbalanced current is caused, therefore, the three-phase current is collected through a current transformer 2 arranged on a three-phase power line of the outlet end of the head grounding box 1, the collected three-phase current is transmitted to a current collector, the current collector converts an analog signal of the three-phase current into a digital signal and transmits the digital signal to an upper computer, and when the three-phase unbalanced current occurs, the submarine cable is indicated to have the fault; on the other hand, when a fault occurs, the alternating magnetic field around the submarine cable is unstable, the induced voltage formed on the induction coil 402 is difficult to reach the standard voltage, and the underwater beacon 3 is difficult to supply power, so that the pulse signal transmitting chip 303 transmits a pulse signal with another frequency to the pulse signal receiver through the power supply of the chemical battery; the pulse signal transmitted by the pulse signal transmitting chip 303 is different in frequency under the two power supply modes, and the upper computer can quickly lock the position of the underwater beacon 3 according to the different frequencies of the pulse signals, so that the fault position is determined, and information is provided for the operation and maintenance of the submarine cable; meanwhile, the upper computer can send out early warning, so that the ground transformer substation or ground communication equipment can reduce the energy output power, and the damage degree of the three-phase wire core of the submarine cable is reduced.
The utility model is applicable to the prior art where it is not described.
Claims (3)
1. The submarine cable fault positioning system based on the underwater beacon is characterized by comprising a head end grounding box, a current transformer, the underwater beacon, a pressure-proof box, a tail end grounding box, a current collector and a pulse signal receiver;
the head end grounding box and the tail end grounding box are respectively connected with the head end and the tail end of the submarine cable, the head end grounding box is connected with a ground substation or ground communication equipment, and the tail end grounding box is connected with a ground cable of an offshore platform; a current transformer is respectively arranged on the three-phase power lines close to the head end of the submarine cable, a current collector is positioned in the head end grounding box, and the current collector is connected with the current transformer and simultaneously performs data transmission with an upper computer;
a plurality of pressure-proof boxes are arranged on the submarine cable at intervals, an underwater beacon is inserted into each pressure-proof box, the underwater beacon is electrified to send pulse signals to a pulse signal receiver arranged on an offshore platform, and the pulse signal receiver transmits the pulse signals to an upper computer; the pressure-proof box is internally provided with an induction energy-taking module and a chemical battery, the induction energy-taking module supplies power for the underwater beacon when the submarine cable fails, and the chemical battery supplies power for the underwater beacon when the submarine cable fails.
2. The subsea cable fault location system based on an underwater beacon of claim 1, wherein the underwater beacon comprises a pressure-proof housing, a seal housing, and a pulse signal transmitting chip; one end of the pressure-proof shell is connected with one end of the sealing shell, the other end of the sealing shell is inserted into the pressure-proof box, and the pulse signal transmitting chip is embedded into the pressure-proof shell and the sealing shell.
3. The submarine cable fault location system based on the submarine beacon according to claim 1 or 2, wherein the induction energy taking module comprises an electromagnetic iron core, an induction coil, a rectifying circuit, a filtering circuit, a voltage stabilizing circuit and a control chip; the induction coil is embedded in the pressure-proof box, and the electromagnetic iron core is positioned at the center of the induction coil; the rectification circuit, the filter circuit, the voltage stabilizing circuit and the control chip are integrated on a circuit board, and the circuit board is arranged in the voltage-proof box; the induction voltage generated by the induction coil is rectified, filtered and stabilized to supply power for the underwater beacon; the control chip is used for controlling the induction energy taking module or the chemical battery to supply power for the underwater beacon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320088472.1U CN219039256U (en) | 2023-01-31 | 2023-01-31 | Submarine cable fault positioning system based on underwater beacon |
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| CN202320088472.1U CN219039256U (en) | 2023-01-31 | 2023-01-31 | Submarine cable fault positioning system based on underwater beacon |
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| CN219039256U true CN219039256U (en) | 2023-05-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118508357A (en) * | 2024-07-18 | 2024-08-16 | 江苏泷洋科技有限公司 | Submarine cable connecting bracket convenient for prompting fault section |
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- 2023-01-31 CN CN202320088472.1U patent/CN219039256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118508357A (en) * | 2024-07-18 | 2024-08-16 | 江苏泷洋科技有限公司 | Submarine cable connecting bracket convenient for prompting fault section |
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