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Online diagnosing and positioning method for submarine cable fault of submarine observation network

A positioning method and observation network technology, which are applied in the fault location, detection of faults by conductor type, etc., to achieve the effect of real-time online diagnosis and positioning

Active Publication Date: 2018-11-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Repeaters and splitters are installed in the backbone submarine cables of large-scale submarine observation networks. These two devices will reflect traveling waves, so it is difficult to locate faults with the traveling wave method

Method used

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  • Online diagnosing and positioning method for submarine cable fault of submarine observation network
  • Online diagnosing and positioning method for submarine cable fault of submarine observation network
  • Online diagnosing and positioning method for submarine cable fault of submarine observation network

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: the submarine observation network power system structure involved in the present invention is as follows figure 1 Shown:

[0052] The submarine observation network power system is composed of coastal base station, branch unit, submarine main base station, load, main cable and branch cable. The coastal base station provides thousands of volts of high-voltage direct current for the entire power system, and the branch cable is connected to the main cable through the branch unit. Both the coastal base station and the main submarine base station are equipped with voltage and current measuring devices, and the voltage and current information is transmitted to the data acquisition module through the communication system. There is no communication system inside the branch unit, and the data acquisition system cannot obtain the voltage and current information at the branch unit.

[0053] The equivalent circuit schematic diagram when the seabed observation network ...

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Abstract

The invention provides an online diagnosing and positioning method for submarine cable fault of submarine observation network, comprising the steps that (1) a topological structure of a power system of the submarine observation network is obtained; (2) voltage and current value at a coast base station and a submarine main base station can be obtained by utilizing a sensor; (3) real-time monitoringis carried out on the voltage and the current value obtained by the sensor, and whether a fault occurs or not is determined; (4) state estimation and solving are conducted on the voltage and the current value at the branch unit; (5) the topological structure after the power system breaks down is analyzed; (6) fault positioning is realized. According to the invention, diagnosis and real-time online positioning of different types of faults of the submarine cables of the submarine observation network can be realized.

Description

technical field [0001] The invention belongs to the technical field of marine observation, and relates to a method for on-line diagnosis and location of submarine cable faults in a submarine observation network. Background technique [0002] The submarine observation network adopts the direct current (DC, Direct Current) system. The coastal base station supplies power for the entire system, providing thousands of volts of high-voltage direct current, which is transmitted to the subsea main base station through the photoelectric composite communication cable. The high-voltage DC converter in the subsea main base station converts the high-voltage direct current into hundreds of volts of medium-voltage direct current. The main submarine base station is connected to the instrument platform, and the instrument platform is designed with an adapter for observation instruments, which converts medium-voltage direct current into low-voltage direct current of different specifications w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/083
Inventor 吕枫杨帆周怀阳姜雅梅朱嘉宇
Owner TONGJI UNIV
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