CN110555251A - submarine cable electrical simulation device of submarine observation network - Google Patents
submarine cable electrical simulation device of submarine observation network Download PDFInfo
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- CN110555251A CN110555251A CN201910778935.5A CN201910778935A CN110555251A CN 110555251 A CN110555251 A CN 110555251A CN 201910778935 A CN201910778935 A CN 201910778935A CN 110555251 A CN110555251 A CN 110555251A
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Abstract
the invention relates to the technical field of submarine observation networks, in particular to a submarine cable electrical simulation device of a submarine observation network, which is used for simulating the structure and the function of the submarine cable of the submarine observation network and comprises a high-voltage input interface, a plurality of distributed submarine cable simulation units, a plurality of branch units and a plurality of ground fault simulation units which are sequentially connected in series; the high-voltage input interface is used for receiving a high-voltage power supply provided by a shore base station; the distributed submarine cable simulation unit is used for simulating submarine cable electrical distribution parameters in unit length; the branch unit is connected with the main base station and used for providing electric energy for the main base station and isolating faults of the main base station; and the ground fault simulation unit is used for simulating the ground short circuit fault of the submarine cable at any position.
Description
Technical Field
The invention belongs to the technical field of submarine observation networks, and particularly relates to a submarine cable electrical simulation device of a submarine observation network.
background
the submarine observation network consists of a shore base station, a main submarine cable, a main base station and a scientific observation instrument. A high-voltage power supply on the shore base station supplies power to a main base station located underwater through a main submarine cable, and the main base station converts the high-voltage power and then provides the converted high-voltage power to a scientific observation instrument located on an underwater platform to enable the main base station to work normally.
the laying depth of the submarine cable can reach thousands of meters, and the laying length can reach thousands of kilometers, so that the construction difficulty is huge and the maintenance cost is extremely high, therefore, the reliability of the underwater equipment is required to be fully verified before the underwater equipment is put into use, and the system is jointly debugged on land. However, due to the limitation of land sites, it is difficult to perform electrical joint debugging of a long-distance submarine cable, a shore base station and a main base station, so that an effective land system verification means is lacked in a submarine observation network system. Therefore, a land submarine cable electrical performance simulation device of an actual submarine cable needs to be developed, and the requirements of the land submarine cable electrical performance simulation device are that the stable state operation condition, the dynamic response condition and the fault operation condition of the actual submarine cable can be simulated, so that land integrated joint debugging is realized by replacing the actual submarine cable, reference is provided for actual construction of engineering and formal operation of a system, and the reliability and the stability of the system are enhanced.
at present, the existing onshore test method and device for submarine cables cannot meet the requirement of the electrical performance of a submarine cable electrical simulation device, and the method and device have the following problems and disadvantages:
1. The existing method and device do not fully consider the distribution characteristics of the electrical parameters of the long-distance submarine cable, mostly adopt lumped model design of submarine cable parameters, and do not fully consider the distribution parameters, so that the actual working state of the real submarine cable long-distance remote power supply cannot be simulated.
2. The existing method and device do not consider the fault simulation function of the submarine cable electric simulation device, and cannot adjust the dynamic parameters when the submarine cable electric simulation device is in short circuit with seawater. The ground fault simulation is used as an important method for verifying the stability and reliability design of the submarine observation network system, and if the function is lacked, the actual condition of operation can not be tested and optimized, or can not be completely simulated.
Disclosure of Invention
the invention aims to solve the technical defects of the existing onshore joint debugging method and device for submarine cables of a submarine observation network.
In order to achieve the purpose, the invention provides an electrical simulation device for submarine cables of a submarine observation network, which is used for simulating the structure and the function of the submarine cables of the submarine observation network, and comprises a high-voltage input interface, a plurality of distributed submarine cable simulation units, a plurality of branch units and a plurality of ground fault simulation units which are sequentially connected in series;
The high-voltage input interface is used for receiving a high-voltage power supply provided by a shore base station;
The distributed submarine cable simulation unit is used for simulating submarine cable electrical distribution parameters in unit length;
The branch unit is connected with the main base station and used for providing electric energy for the main base station and isolating faults of the main base station;
and the ground fault simulation unit is used for simulating the ground short circuit fault of the submarine cable at any position.
As one improvement of the technical scheme, the distributed submarine cable simulation units are cascaded through a high-voltage-resistant connector;
According to the formula (1), obtaining the number N of the distributed submarine cable simulation units:
the unit length p of the distributed submarine cable simulation unit is fixed; p is selected to be 1-50 km; h is the total length of the submarine cable simulated by the submarine cable electric simulation device.
as an improvement of the above technical solution, the distributed submarine cable simulation unit includes: a non-inductive resistor R, a non-polar capacitor C and an inductor L;
each unit length of distributed submarine cable simulation unit is arranged in an insulation box body, and the insulation box bodies are connected through a high-voltage-resistant connector;
Obtaining a non-inductive resistor R according to a formula (2);
Wherein R st is the resistance of the steel conductor part, R cu is the resistance of the copper conductor part;
Wherein the content of the first and second substances,
Wherein a is the inner diameter of the optical fiber layer in the submarine cable, b is the inner diameter of the conductor in the submarine cable, rho st is the resistivity of steel, rho cu is the resistivity of copper;
obtaining an inductance L according to a formula (5);
wherein, lambda cable is submarine cable magnetic flux, i cable is submarine cable current;
λcable＝λst+λcu (6)
ic。ble＝icu+ist (7)
wherein lambda st is the magnetic flux of a steel conductor, lambda cu is the magnetic flux of a copper conductor, i cu is the partial current of the copper conductor, and i st is the partial current of the steel conductor;
wherein B 1 is magnetic induction intensity, mu is magnetic conductivity of the conductor, i is current flowing on the conductor, and r is any radius in the conductor in the submarine cable;
Acquiring a non-polar capacitor C according to a formula (10);
Wherein epsilon is the dielectric constant of the insulating layer, d 1 is the outer radius of the insulating layer in the submarine cable, and c 1 is the inner radius of the insulating layer in the submarine cable.
As an improvement of the above technical solution, a connection mode among the non-inductive resistor R, the non-polar capacitor C, and the inductor L in the distributed submarine cable analog unit is as follows:
the input of the distributed submarine cable simulation unit is connected with the end A of a non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of a non-polar capacitor C, and the end B of the non-polar capacitor C is connected with seawater or the ground; the B end of the non-inductive resistor R is also connected with the A end of the inductor L, and the B end of the inductor L is connected with the next distributed submarine cable simulation unit.
as an improvement of the above technical solution, a connection mode among the non-inductive resistor R, the non-polar capacitor C, and the inductor L in the distributed submarine cable analog unit is as follows:
the input of the distributed submarine cable simulation unit is connected with the end A of the non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of the inductor L, the end B of the inductor L is connected with the end A of the non-polar capacitor C, the end B of the inductor L is also connected with the next distributed submarine cable simulation unit, and the end B of the non-polar capacitor C is connected with seawater or the ground.
As an improvement of the above technical solution, a connection mode among the non-inductive resistor R, the non-polar capacitor C, and the inductor L in the distributed submarine cable analog unit is as follows:
The input of the distributed submarine cable simulation unit is connected with the end A of a first non-inductive resistor R1, the end B of the first non-inductive resistor R1 is connected with the end A of a first inductor L1, the end B of the first inductor L1 is respectively connected with the end A of a first nonpolar capacitor C1 and the end A of a second non-inductive resistor R2, the end B of the second non-inductive resistor R2 is connected with the end A of a second inductor L2, and the end B of the second inductor L2 is connected with the next distributed submarine cable simulation unit; the end B of the non-polar capacitor C is connected with seawater or the ground; wherein R1+ R2 ═ R, L1+ L2 ═ L.
as an improvement of the above technical solution, the high-voltage input interface includes: the safety switch, the current-limiting resistor and the grounding terminal; the safety switch, the current-limiting resistor and the grounding terminal are connected in series;
The safety switch is used for grounding protection when the submarine cable electric simulation device is overhauled or maintained and discharging residual charge when the submarine cable electric simulation device is shut down;
The current limiting resistor is used for limiting the current amplitude during discharging;
the safety switch is a normally open relay.
the branch units are connected with the main base stations in parallel, and the number of the branch units is equal to that of the main base stations needing to be arranged, and the branch units comprise a first switch K1, a second switch K2, a third switch K3, a first capacitor C K1, a first resistor R K1 and a second resistor R K2;
The first switch K1, the second switch K2 and the third switch K3 are all normally closed relays, and the first resistor R K1 is used as a slow-closing resistor and used for inhibiting overshoot current;
The first switch K1, the second switch K2 and the third switch K3 are connected in series, the second switch K2 is connected with the first resistor R K1 in parallel, and the first capacitor C K1 is connected with the second resistor R K2 in series and then connected with the third switch K3 in parallel.
as an improvement of the above technical solution, the ground fault simulation unit includes: the fault protection circuit comprises a T-shaped lead shunt, a first fault simulation inductor L1, a second fault simulation inductor L2, a high-voltage switch, an adjustable inductor L3, a far-end control switch and a ground terminal;
the A end of the T-shaped lead shunt is connected with a first fault simulation inductor L1, the B end of the T-shaped lead shunt is connected with a second fault simulation inductor L2, and the C end of the T-shaped lead shunt is sequentially connected with a high-voltage switch Ks, an adjustable inductor L3 and a ground terminal GND in series; the remote control switch is connected with the high-voltage switch Ks;
the adjustable inductor L3 is used for adjusting the magnitude of the fault current; the high-voltage switch Ks is a normally-open high-voltage gas relay;
And the remote control switch is used for controlling the pulse width of the on-state signal of the high-voltage switch Ks.
As an improvement of the above technical solution, the fault type simulated by the fault simulation unit includes: faults between the submarine cable and the submarine cable connection, faults between the submarine cable and the underwater power supply, and faults between the onshore power supply and the submarine cable.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides three topological structures of a distributed submarine cable simulation unit, and provides a distributed submarine cable simulation unit, wherein after the structure and line parameters of a photoelectric composite cable are comprehensively considered, a circuit model of the distributed submarine cable simulation unit and a calculation method of distributed resistance, distributed inductance and distributed capacitance are established, and the electric distribution electrical parameters of the submarine cable in unit length are accurately simulated.
the branch unit in the device of the invention provides electric energy for the main base station, and simultaneously carries out isolation when the main base station fails, and ensures that the rest parts which do not fail still operate normally. The branch unit provided by the invention can effectively eliminate electric arc and overshoot during live switching, ensure the safety and reliability of the on-off of the switch under the high voltage or large current state,
The submarine cable electrical simulation device is additionally provided with the fault simulation unit, so that the influence of the ground short-circuit fault of the submarine cable on the submarine observation network system can be simulated on land, the diagnosis and the processing of the fault on land are realized, the possible problems of the submarine observation network power supply system can be conveniently optimized in advance, the reliability and the stability of the submarine observation network power supply system are improved, and the probability of offshore construction and maintenance is reduced.
drawings
FIG. 1 is a schematic structural diagram of an electrical simulation device for a submarine observation network submarine cable according to the present invention;
Fig. 2 is a schematic structural diagram of a first connection mode of a distributed submarine cable simulation unit of a submarine observation network submarine cable electrical simulation device according to the present invention;
FIG. 3 is a schematic structural diagram of a second connection mode of a distributed submarine cable simulation unit of the submarine observation network submarine cable electric simulation device according to the invention;
fig. 4 is a schematic structural diagram of a third connection mode of a distributed submarine cable simulation unit of the submarine observation network submarine cable electrical simulation device according to the present invention;
FIG. 5 is a cross-sectional view of an actual sea cable of the submarine observation network sea cable electrical simulation apparatus of the present invention;
FIG. 6 is a schematic diagram of a branch unit structure of the submarine cable electric simulation device of the submarine observation network according to the present invention;
FIG. 7 is a flow chart of load shedding of a branch unit of the submarine cable electric simulation device of the submarine observation network according to the present invention;
FIG. 8 is a flow chart of the load input of the branch unit of the submarine cable electric simulation device of the submarine observation network according to the present invention;
FIG. 9 is a schematic structural diagram of a fault simulation unit of the submarine observation network submarine cable electric simulation device according to the present invention;
fig. 10 is a position distribution diagram of a fault simulation unit of the submarine observation network submarine cable electric simulation device according to the invention.
Detailed Description
the invention will now be further described with reference to the accompanying drawings.
The invention provides a submarine observation network submarine cable electrical simulation device which can simulate the structure and function of a real submarine cable, can replace the actual submarine cable to carry out experimental research on land, provides integrated joint debugging experimental conditions close to the real environment for a submarine observation network power supply system, enables the submarine observation network power supply system to realize land integrated joint debugging test, and provides reference for offshore construction, performance optimization, fault diagnosis and operation maintenance of an electrical system.
as shown in fig. 1, the invention provides an electrical simulation device for submarine cables of a submarine observation network, which is used for simulating the structure and functions of submarine cables of the submarine observation network, and comprises a high-voltage input interface, a plurality of distributed submarine cable simulation units, a plurality of branch units and a plurality of ground fault simulation units which are sequentially connected in series;
The high-voltage input interface is used for receiving a high-voltage power supply provided by a shore base station;
the distributed submarine cable simulation unit is used for simulating submarine cable electrical distribution parameters in unit length; the submarine cable electrical distribution parameters comprise distributed resistance, distributed capacitance and distributed inductance;
the branch unit is connected with the main base station in parallel and used for providing electric energy for the main base station and isolating faults of the main base station;
And the ground fault simulation unit is used for simulating the ground short circuit fault of the submarine cable at any position.
and the distributed submarine cable simulation units are cascaded through high-voltage-resistant connectors. According to formula (1), the number N of distributed submarine cable simulation units is determined by the submarine cable length h and the unit length p simulated by the submarine cable electric simulation device, and the number N of distributed submarine cable simulation units is obtained:
the unit length p of the distributed submarine cable simulation unit is fixed; p is selected to be 1-50 km; h is the total length of the submarine cable simulated by the submarine cable electric simulation device.
The distributed submarine cable simulation unit comprises: a non-inductive resistor R, a non-polar capacitor C and an inductor L;
each unit length of distributed submarine cable simulation unit is arranged in an insulation box body to ensure high-voltage transmission safety, and the insulation box bodies are connected through a high-voltage resistant connector;
obtaining a non-inductive resistor R according to a formula (2);
wherein R st is the resistance of the steel conductor part, R cu is the resistance of the copper conductor part;
wherein the content of the first and second substances,
Wherein, as shown in FIG. 5, a is the inner diameter of the optical fiber layer in the submarine cable, b is the inner diameter of the conductor in the submarine cable, c represents the outer diameter of the copper pipe in the submarine cable, ρ st is the resistivity of steel, ρ cu is the resistivity of copper;
Obtaining an inductance L according to a formula (5);
Wherein, lambda cable is submarine cable magnetic flux, i cable is submarine cable current;
λcable＝λst+λcu (6)
icable＝icu+ist (7)
wherein lambda st is the magnetic flux of a steel conductor, lambda cu is the magnetic flux of a copper conductor, i cu is the partial current of the copper conductor, and i st is the partial current of the steel conductor;
wherein B 1 is magnetic induction intensity, mu is magnetic conductivity of the conductor, i is current flowing on the conductor, and r is any radius in the conductor in the submarine cable;
acquiring a non-polar capacitor C according to a formula (10);
Wherein epsilon is the dielectric constant of the insulating layer, d 1 is the outer radius of the insulating layer in the submarine cable, and c 1 is the inner radius of the insulating layer in the submarine cable.
the connection modes among the non-inductive resistor R, the non-polar capacitor C and the inductor L in the distributed submarine cable simulation unit mainly comprise the following three connection modes:
as shown in fig. 2, the first way: the input of the distributed submarine cable simulation unit is connected with the end A of a non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of a non-polar capacitor C, and the end B of the non-polar capacitor C is connected with seawater or the ground; the B end of the non-inductive resistor R is also connected with the A end of the inductor L, and the B end of the inductor L is connected with the next distributed submarine cable simulation unit.
as shown in fig. 3, the second way: the input of the distributed submarine cable simulation unit is connected with the end A of the non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of the inductor L, the end B of the inductor L is connected with the end A of the non-polar capacitor C, the end B of the inductor L is also connected with the next distributed submarine cable simulation unit, and the end B of the non-polar capacitor C is connected with seawater or the ground.
as shown in fig. 4, the third method: the input of the distributed submarine cable simulation unit is connected with the end A of a first non-inductive resistor R1, the end B of the first non-inductive resistor R1 is connected with the end A of a first inductor L1, the end B of the first inductor L1 is respectively connected with the end A of a first nonpolar capacitor C1 and the end A of a second non-inductive resistor R2, the end B of the second non-inductive resistor R2 is connected with the end A of a second inductor L2, and the end B of the second inductor L2 is connected with the next distributed submarine cable simulation unit; the end B of the non-polar capacitor C is connected with the seawater or the ground. Wherein R1+ R2 ═ R, L1+ L2 ═ L
the high-voltage input interface comprises: the safety switch, the current-limiting resistor and the grounding terminal; the safety switch, the current-limiting resistor and the grounding terminal are connected in series;
The safety switch is used for grounding protection when the submarine cable electric simulation device is overhauled or maintained and discharging residual charge when the submarine cable electric simulation device is shut down;
The current limiting resistor is used for limiting the current amplitude during discharging;
The safety switch is a normally open relay.
The branch unit is connected with the main base station in parallel and used for supplying power and bypassing the load of the main base station, and meanwhile, when a fault occurs, a fault point can be isolated and the normal work of other parts of the submarine observation network can be ensured; as shown in fig. 6. The number of the branch units is determined according to the number of the main base stations, the number of the branch units corresponds to the number of the main base stations one to one, namely the number of the branch units is equal to the number of the main base stations needing to be arranged.
The overshoot current suppression circuit comprises a first switch K1, a second switch K2, a third switch K3, a first capacitor C K1, a first resistor R K1 and a second resistor R K2, wherein the first switch K1, the second switch K2 and the third switch K3 are all normally closed relays;
the first switch K1, the second switch K2 and the third switch K3 are connected in series, the second switch K2 is connected with the first resistor R K1 in parallel, and the first capacitor C K1 is connected with the second resistor R K2 in series and then connected with the third switch K3 in parallel.
Under the high voltage or heavy current state, the branch unit can prevent the electric arc and the overshoot phenomenon that the switch break-make produced, guarantee the safe reliability of break-make. The number of the branch units is equal to the number of the main base stations needing to be arranged.
When the load is cut off, the working flow of the branching unit is shown in fig. 7, and the working principle of the branching unit is as follows.
in the initial state, the first switch K1, the second switch K2 and the third switch K3 are all disconnected, and the branch unit supplies power to the main base station connected in parallel with the branch unit.
then, the first switch K1 and the third switch K3 are closed, and the current flows through the first switch K1, the first resistor R K1 and the third switch K3, wherein R K1 is used as a slow closing resistor for restraining the overshoot current.
Then, the second switch K2 is turned off, and current flows through the first switch K1, the second switch K2, the third switch K3, and the branch unit no longer supplies power to the main base station, thereby achieving disconnection of the main base station.
When the load is switched in, the working flow of the branch unit is as shown in fig. 8, and the working principle is as follows:
the third switch K3 is turned on, current passes through the first switch K1, the second switch K2, the first capacitor C K1 and the second resistor R K2 and is used for charging the first capacitor C K1, the current is gradually reduced, and after the capacitors are fully charged, the current is reduced to zero;
After the current is reduced to zero, the first switch K1 and the second switch K2 are opened;
at this time, the third switch K3 is closed again, and the energy stored in the first capacitor C K1 is released to be ready for the next switching.
And the ground fault simulation unit is used for simulating the influence of the submarine cable electric simulation device on the submarine observation network system when the ground short-circuit fault occurs.
As shown in fig. 9, the ground fault simulation unit includes: the fault protection circuit comprises a T-shaped lead shunt, a first fault simulation inductor L1, a second fault simulation inductor L2, a high-voltage switch, an adjustable inductor L3, a far-end control switch and a ground terminal;
the A end of the T-shaped lead shunt is connected with a first fault simulation inductor L1, the B end of the T-shaped lead shunt is connected with a second fault simulation inductor L2, and the C end of the T-shaped lead shunt is sequentially connected with a high-voltage switch Ks, an adjustable inductor L3 and a ground terminal GND in series; the remote control switch is connected with the high-voltage switch Ks;
the adjustable inductor L3 is used for adjusting the magnitude of the fault current;
The Ks is a normally open high-voltage gas relay;
and the remote control switch is used for controlling the pulse width of the on-state signal of the high-voltage switch Ks.
the ground fault simulation unit is used for being connected to any position of the submarine cable electric simulation device and simulating dynamic response when different positions of the submarine cable have faults.
The fault type simulated by the fault simulation unit comprises the following steps: faults between the submarine cable and the submarine cable connection, faults between the submarine cable and the underwater power supply, and faults between the onshore power supply and the submarine cable.
Because the damage degree of the submarine cable at different positions to the system is different, the fault simulation unit can be connected to any position of the submarine cable electric simulation device through the high-voltage connector, and the dynamic response of the submarine cable at different positions during fault can be simulated.
as shown in fig. 10, the working principle of the fault simulation unit is as follows:
The S1 position simulates the fault of the power output end of the shore base station, the S2 position simulates the fault between the distributed submarine cable simulation units, and the S3 position simulates the fault beside the main base station;
When the high-voltage switch Ks works normally, the high-voltage switch Ks is in an open state;
when a fault is simulated, firstly, the value of the adjustable inductor L3 is adjusted according to the fault simulation parameters;
through the remote control switch, the pulse width time of the opening signal of the high-voltage switch Ks is controlled, and submarine cable faults of different degrees and types can be simulated.
The working principle of the submarine cable electric simulation device is as follows:
when the submarine cable electric simulation device simulates a normal working state, a shore base station power supply passes through the high-voltage input interface, the distributed submarine cable simulation units and the branch units supply power to each main base station, the high-voltage switches Ks of all the ground fault simulation units are disconnected, the ground fault simulation units do not work, and the submarine cable electric simulation device can perform stable state and dynamic tests of the main base stations during normal working and can also perform long-term shutdown tests. If a main base station fails in the test, the corresponding branch unit bypasses the main base station.
when the submarine cable electric simulation device simulates a ground fault state, firstly, the position of the simulated fault is determined, a ground fault simulation unit is connected into a designated position, the numerical value of the adjustable inductor L3 is adjusted according to the type and parameters of the fault simulation, the high-voltage switch Ks is disconnected, the high-voltage input interface is opened, the shore base station power supply supplies power to each main base station through the distributed submarine cable simulation unit, the high-voltage switch Ks is connected through the remote control switch after the shore base station power supply works stably, the short-circuit fault occurs at the designated position, and the dynamic response and protection functions of the main base station are tested when the submarine cable has the short-circuit fault.
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. a submarine observation network submarine cable electrical simulation device is used for simulating the structure and the function of a submarine observation network submarine cable and is characterized by comprising a high-voltage input interface, a plurality of distributed submarine cable simulation units, a plurality of branch units and a plurality of ground fault simulation units which are sequentially connected in series;
the high-voltage input interface is used for receiving a high-voltage power supply provided by a shore base station;
the distributed submarine cable simulation unit is used for simulating submarine cable electrical distribution parameters in unit length;
the branch unit is connected with the main base station and used for providing electric energy for the main base station and isolating faults of the main base station;
And the ground fault simulation unit is used for simulating the ground short circuit fault of the submarine cable at any position.
2. the submarine observation network submarine cable electrical simulation device according to claim 1, wherein the distributed submarine cable simulation units are cascaded through high-voltage-resistant connectors;
According to the formula (1), obtaining the number N of the distributed submarine cable simulation units:
The unit length p of the distributed submarine cable simulation unit is fixed; p is selected to be 1-50 km; h is the total length of the submarine cable simulated by the submarine cable electric simulation device.
3. the seafloor observatory network submarine cable electrical simulation device of claim 1 or 2, wherein the distributed submarine cable simulation unit comprises: a non-inductive resistor R, a non-polar capacitor C and an inductor L;
Each unit length of distributed submarine cable simulation unit is arranged in an insulation box body, and the insulation box bodies are connected through a high-voltage-resistant connector;
Obtaining a non-inductive resistor R according to a formula (2);
Wherein R st is the resistance of the steel conductor part, R cu is the resistance of the copper conductor part;
Wherein the content of the first and second substances,
Wherein a is the inner diameter of an optical fiber layer in the submarine cable, b is the inner diameter of a conductor in the submarine cable, c represents the outer diameter of a copper pipe in the submarine cable, rho st is the resistivity of steel, rho cu is the resistivity of copper;
obtaining an inductance L according to a formula (5);
Wherein, lambda cable is submarine cable magnetic flux, i cable is submarine cable current;
λcable＝λst+λcu (6)
icable＝icu+ist (7)
wherein lambda st is the magnetic flux of a steel conductor, lambda cu is the magnetic flux of a copper conductor, i cu is the partial current of the copper conductor, and i st is the partial current of the steel conductor;
Wherein B 1 is magnetic induction intensity, mu is magnetic conductivity of the conductor, i is current flowing on the conductor, and r is any radius in the conductor in the submarine cable;
Acquiring a non-polar capacitor C according to a formula (10);
Wherein epsilon is the dielectric constant of the insulating layer, d 1 is the outer radius of the insulating layer in the submarine cable, and c 1 is the inner radius of the insulating layer in the submarine cable.
4. the submarine observation network submarine cable electric simulation device according to claim 3, wherein the noninductive resistor R, the nonpolar capacitor C and the inductor L in the distributed submarine cable simulation unit are connected in the following manner:
the input of the distributed submarine cable simulation unit is connected with the end A of a non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of a non-polar capacitor C, and the end B of the non-polar capacitor C is connected with seawater or the ground; the B end of the non-inductive resistor R is also connected with the A end of the inductor L, and the B end of the inductor L is connected with the next distributed submarine cable simulation unit.
5. the submarine observation network submarine cable electric simulation device according to claim 3, wherein the noninductive resistor R, the nonpolar capacitor C and the inductor L in the distributed submarine cable simulation unit are connected in the following manner:
the input of the distributed submarine cable simulation unit is connected with the end A of the non-inductive resistor R, the end B of the non-inductive resistor R is connected with the end A of the inductor L, the end B of the inductor L is connected with the end A of the non-polar capacitor C, the end B of the inductor L is also connected with the next distributed submarine cable simulation unit, and the end B of the non-polar capacitor C is connected with seawater or the ground.
6. the submarine observation network submarine cable electric simulation device according to claim 3, wherein the noninductive resistor R, the nonpolar capacitor C and the inductor L in the distributed submarine cable simulation unit are connected in the following manner:
the input of the distributed submarine cable simulation unit is connected with the end A of a first non-inductive resistor R1, the end B of the first non-inductive resistor R1 is connected with the end A of a first inductor L1, the end B of the first inductor L1 is respectively connected with the end A of a first nonpolar capacitor C1 and the end A of a second non-inductive resistor R2, the end B of the second non-inductive resistor R2 is connected with the end A of a second inductor L2, and the end B of the second inductor L2 is connected with the next distributed submarine cable simulation unit; the end B of the non-polar capacitor C is connected with seawater or the ground; wherein R1+ R2 ═ R, L1+ L2 ═ L.
7. The subsea observation network sea cable electrical simulation apparatus of claim 1, wherein the high voltage input interface comprises: the safety switch, the current-limiting resistor and the grounding terminal; the safety switch, the current-limiting resistor and the grounding terminal are connected in series;
the safety switch is used for grounding protection when the submarine cable electric simulation device is overhauled or maintained and discharging residual charge when the submarine cable electric simulation device is shut down;
the current limiting resistor is used for limiting the current amplitude during discharging;
the safety switch is a normally open relay.
8. The submarine observation network submarine cable electric simulation device according to claim 1, wherein the branch units are connected in parallel with main base stations, and the number of the branch units is equal to the number of the main base stations to be arranged, and the submarine observation network submarine cable electric simulation device comprises a first switch K1, a second switch K2, a third switch K3, a first capacitor C K1, a first resistor R K1 and a second resistor R K2;
the first switch K1, the second switch K2 and the third switch K3 are all normally closed relays, and the first resistor R K1 is used as a slow-closing resistor and used for inhibiting overshoot current;
the first switch K1, the second switch K2 and the third switch K3 are connected in series, the second switch K2 is connected with the first resistor R K1 in parallel, and the first capacitor C K1 is connected with the second resistor R K2 in series and then connected with the third switch K3 in parallel.
9. the seafloor observatory network submarine cable electrical simulation device of claim 1, wherein the ground fault simulation unit comprises: the fault protection circuit comprises a T-shaped lead shunt, a first fault simulation inductor L1, a second fault simulation inductor L2, a high-voltage switch, an adjustable inductor L3, a far-end control switch and a ground terminal;
the A end of the T-shaped lead shunt is connected with a first fault simulation inductor L1, the B end of the T-shaped lead shunt is connected with a second fault simulation inductor L2, and the C end of the T-shaped lead shunt is sequentially connected with a high-voltage switch Ks, an adjustable inductor L3 and a ground terminal GND in series; the remote control switch is connected with the high-voltage switch Ks;
The adjustable inductor L3 is used for adjusting the magnitude of the fault current; the high-voltage switch Ks is a normally-open high-voltage gas relay;
And the remote control switch is used for controlling the pulse width of the on-state signal of the high-voltage switch Ks.
10. the subsea observation network submarine cable electrical simulation apparatus of claim 9, wherein the types of faults simulated by the fault simulation unit comprise: faults between the submarine cable and the submarine cable connection, faults between the submarine cable and the underwater power supply, and faults between the onshore power supply and the submarine cable.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484644A (en) * | 2021-07-13 | 2021-10-08 | 中国海洋石油集团有限公司 | Submarine cable simulation device and method suitable for testing long-distance variable-frequency power supply system |
| CN116488126A (en) * | 2023-06-21 | 2023-07-25 | 华海通信技术有限公司 | Pressure relief device, submarine cable system and submarine cable voltage relief method |
| CN117440274A (en) * | 2023-12-20 | 2024-01-23 | 华海通信技术有限公司 | Detachable submarine observation network underwater main base station |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571435A (en) * | 2012-01-12 | 2012-07-11 | 山东省科学院海洋仪器仪表研究所 | Fault diagnosis system for submarine observation network nodes |
| CN103941689A (en) * | 2014-04-17 | 2014-07-23 | 浙江大学 | Seabed observation network electrode switching and maintaining system |
| CN204992552U (en) * | 2015-10-15 | 2016-01-20 | 中国科学院沈阳自动化研究所 | A cladon device for seabed observational network system |
| CN107093894A (en) * | 2016-02-17 | 2017-08-25 | 中国科学院声学研究所 | A kind of constant current constant voltage conversion equipment under water suitable for seabed constant-current supply system |
| CN108512717A (en) * | 2018-02-09 | 2018-09-07 | 中国科学院声学研究所 | A kind of submarine observation network master base station underwater in-situ test system and method |
| CN108732464A (en) * | 2018-05-23 | 2018-11-02 | 同济大学 | Submarine observation network extra large cable on-line fault diagnosis and localization method |
| CN108983038A (en) * | 2018-05-17 | 2018-12-11 | 同济大学 | Cable system submarine observation network electric system experiment porch |
| CN109713658A (en) * | 2019-01-16 | 2019-05-03 | 中国科学院声学研究所 | A kind of submarine observation network master base station based on constant current-supplying |
-
2019
- 2019-08-22 CN CN201910778935.5A patent/CN110555251B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571435A (en) * | 2012-01-12 | 2012-07-11 | 山东省科学院海洋仪器仪表研究所 | Fault diagnosis system for submarine observation network nodes |
| CN103941689A (en) * | 2014-04-17 | 2014-07-23 | 浙江大学 | Seabed observation network electrode switching and maintaining system |
| CN204992552U (en) * | 2015-10-15 | 2016-01-20 | 中国科学院沈阳自动化研究所 | A cladon device for seabed observational network system |
| CN107093894A (en) * | 2016-02-17 | 2017-08-25 | 中国科学院声学研究所 | A kind of constant current constant voltage conversion equipment under water suitable for seabed constant-current supply system |
| CN108512717A (en) * | 2018-02-09 | 2018-09-07 | 中国科学院声学研究所 | A kind of submarine observation network master base station underwater in-situ test system and method |
| CN108983038A (en) * | 2018-05-17 | 2018-12-11 | 同济大学 | Cable system submarine observation network electric system experiment porch |
| CN108732464A (en) * | 2018-05-23 | 2018-11-02 | 同济大学 | Submarine observation network extra large cable on-line fault diagnosis and localization method |
| CN109713658A (en) * | 2019-01-16 | 2019-05-03 | 中国科学院声学研究所 | A kind of submarine observation network master base station based on constant current-supplying |
Non-Patent Citations (4)
| Title |
|---|
| LI FENG-HUA等: "A Method of Measuring the In Situ Seafloor Sound Speed using Two Receivers with Warping Transformation", 《CHIN. PHYS. LETT》 * |
| YAMEI JIANG等: "Large-Signal Stability Analysis of the Undersea Direct Current Power System for Scientific Cabled Seafloor Observatories", 《SCIENCE》 * |
| 吕枫等: "缆系海底观测网原型系统设计", 《仪器仪表学报》 * |
| 徐菲菲: "海底观测网络可控型主缆分支器的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484644A (en) * | 2021-07-13 | 2021-10-08 | 中国海洋石油集团有限公司 | Submarine cable simulation device and method suitable for testing long-distance variable-frequency power supply system |
| CN116488126A (en) * | 2023-06-21 | 2023-07-25 | 华海通信技术有限公司 | Pressure relief device, submarine cable system and submarine cable voltage relief method |
| CN116488126B (en) * | 2023-06-21 | 2023-09-05 | 华海通信技术有限公司 | Pressure relief device, submarine cable system and submarine cable voltage relief method |
| CN117440274A (en) * | 2023-12-20 | 2024-01-23 | 华海通信技术有限公司 | Detachable submarine observation network underwater main base station |
| CN117440274B (en) * | 2023-12-20 | 2024-04-12 | 华海通信技术有限公司 | Detachable submarine observation network underwater main base station |
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