Simulation experiment device, simulation experiment system and method of submarine cable flashover discharge

Abstract

The invention discloses a simulated experimental device for submarine cable flashover discharge of a submarine observation network, comprising: a constant voltage power supply; a submarine cable equivalent experimental model, which is used to simulate the transmission characteristics of a real submarine cable, and which includes several cable simulation circuits , each cable simulation circuit includes a resistance-capacitance sensor model composed of resistance, capacitance, and inductance; a junction box node power converter, which is used to convert the high voltage on the equivalent experimental model of the submarine cable into a low voltage and output it; Short-circuit device, which includes a section of damaged real submarine cable, sea water, tank, electrode, grounding switch tube, the damaged real submarine cable is connected between two sections of submarine cable equivalent experimental models, and placed in a tank filled with sea water, The submarine cable flashover discharge phenomenon in actual working conditions is simulated by controlling the on-off of the grounding switch tube. Also disclosed is a simulation experiment system and method for reducing the damage degree of the submarine cable flashover discharge of the submarine observation network, which can reduce the damage of the flashover discharge.

Description

technical field [0001] The invention belongs to the field of marine detection, and in particular relates to a simulation experiment device, simulation experiment system and method of submarine cable flashover discharge. Background technique [0002] The rapid development of the ocean industry has led to the upsurge of research on seabed observation networks. Since the 1970s, countries around the world have gradually started research on seabed observation networks. Beginning in the 1990s, various countries began to establish submarine observation network systems one after another. The more representative ones are: ACO, H2O, NEPTUNE, MARS, ESONET and DONET. Among them, the NETPUNE submarine observation network has two shore-based power sources and six nodes, and forms a ring network with a total length of 800 kilometers of transmission cables. [0003] Domestic research on seabed observation networks started relatively late. In 2009, Tongji University established a seabed obs...

AI Technical Summary

Problems solved by technology

During the manufacturing process, there will be some manufacturing defects in the cable, such as doping with metal impurities or voids in the outer insulator. It is very likely to be broken down, resulting in a flashover discharge phenomenon in the transmission line, and thus causing damage to the back-end nodes

In addition, on the seabed, there may be continuous friction between the cable and the rock due to the action of the ship's anchor, fishing gear or ocean currents, which will also cause damage to the cable insulation layer, resulting in a flashover of the cable core in direct contact with seawater discharge phenomenon

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