Submarine cable state evaluation method based on subjective and objective combination weighting

Abstract

The invention discloses a submarine cable state evaluation method based on subjective and objective combination weighting, and the method comprises the following steps: firstly obtaining panoramic data of submarine cable operation, and selecting indexes affecting the health state of a submarine cable to establish an evaluation index system; secondly, determining the subjective weight of each state quantity by adopting an improved analytic hierarchy process, and determining the objective weight of each state quantity by adopting an entropy weight method; combining the subjective weight and the objective weight, and calculating a comprehensive weight; then, determining the evaluated state levels, obtaining the relative deterioration degree based on the standards of the state quantities, obtaining the fuzzy membership degree function of the state levels of the state quantities, and constructing a fuzzy evaluation matrix; and finally, based on the comprehensive weight and the fuzzy evaluation matrix, obtaining the membership degree of each state grade of the submarine cable, and evaluating the state of the submarine cable by adopting a weighted average method. According to the method, the health state of the submarine cable can be accurately evaluated, hidden dangers can be checked in time, and safe and reliable operation of the submarine cable is ensured.

Description

technical field [0001] The invention relates to the technical field of power equipment safety, in particular to a submarine cable state assessment method based on subjective and objective combined weighting, and belongs to the technical field of submarine cable state assessment. Background technique [0002] With the development and utilization of marine resources, as well as the development of offshore platforms and offshore wind farms, submarine cables have been increasingly used in recent years as a connection channel for power and communication between offshore platform equipment and underwater production systems. The stable operation of submarine cables is not only related to the production of offshore platforms, but also to the reliable operation of the power grid of the entire platform group. [0003] Due to the special operating environment of submarine cables, routine inspections cannot be carried out, and effective safety management measures are lacking. Once an ac...

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Problems solved by technology

[0004] At present, there are few methods for evaluating the state of submarine cables. CN111060472A discloses a method for characterizing and analyzing the aging state of cross-linked polyethylene submarine cable insulation materials. Fourier transform infrared spectrometers are used to quickly detect samples in different aging states. Spectral characteristic fingerprint absorption peak area characterizes the aging state of the XLPE submarine cable insulation medium, but only analyzes the aging state of the submarine cable, and does not analyze the overall health status of the submarine cable

And if only part of the state quantity is considered to evaluate the state of the submarine cable, the evaluation results will have problems of dispersion and large errors

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