Submarine cable composite detection and fault diagnosis method and system

Abstract

The invention discloses a submarine cable composite detection and fault diagnosis method and system. The diagnosis method comprises the following steps: establishing a submarine cable database; carrying out geometric modeling on the submarine cable to obtain a submarine cable model, and carrying out composite grid division containing triangular prisms and hexahedrons; setting physical property parameters and boundary conditions of the submarine cable model according to the submarine cable database, performing multi-field coupling on the submarine cable model by adopting a heat transfer equation, a mechanical equation and an electrical equation, and establishing a heat-fluid-solid multi-field coupling simulation model; and in a submarine cable operation monitoring process, comparing data in the submarine cable database with subsequent submarine cable detection values, and diagnosing a submarine cable fault state. According to the method, a simulation result is more practical, the simulation result is applied to the monitoring process of the submarine cable, parameter analysis under a specific environment and an operation condition is realized, and high-precision fault diagnosis is realized by combining with a detection system.

Description

technical field [0001] The invention relates to the field of submarine cables, in particular to a method and system for composite detection and fault diagnosis of submarine cables based on multi-field coupling simulation. Background technique [0002] With the optimization of the national energy structure and the further improvement of the demand for large-scale energy dispatch and distribution, the development of technologies related to high-voltage submarine cables across the sea area has become a top priority. Because the submarine cable is always in the environment of ocean immersion or seabed friction, and factors such as the temperature and current changes of the submarine cable itself, further aggravate the unfavorable factors such as corrosion, deformation, and aging of the outer covering or other layers of plastics. Therefore, it is difficult but very important to predict and detect some of the internal physical parameters of the submarine cable under a certain oper...

AI Technical Summary

Problems solved by technology

However, the specific environment and operating conditions will change in real time or even change suddenly, so a single detection system monitoring method may not be enough to accurately analyze the deviation of the value

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