High-dimensional index-based substation switch cabinet partial discharge state evaluation method

Abstract

The invention discloses a transformer substation switch cabinet partial discharge state evaluation method based on a high-dimensional index. The method comprises the following steps: collecting phase decomposition partial discharge PRPD atlas data of a transformer substation switch cabinet; spectrogram construction and statistical characteristic calculation are carried out on the obtained partial discharge PRPD spectrogram data; performing preprocessing on statistical characteristics obtained by calculation of the atlas data, and constructing a spatio-temporal data set matrix; and based on a random matrix theory, sequentially selecting matrixes on the spatio-temporal data set matrix by adopting a moving sliding window method, constructing a statistical magnitude by utilizing a Chebyshev polynomial T3 to judge whether an abnormal value occurs, calculating the statistical magnitude of the matrix selected by a sliding window, and evaluating the state of the substation switch cabinet. The operation state of the transformer substation switch cabinet can be monitored, and the monitoring efficiency and accuracy of the transformer substation switch cabinet are improved.

Description

technical field [0001] The invention relates to the technical field of substation equipment, in particular to a high-dimensional index partial discharge state evaluation method of a substation switch cabinet, an electronic device and a readable storage medium. Background technique [0002] Partial Discharge (PD) is a long-term and slow damage process of insulating materials. Switchgear is a circuit used to control and protect electrical appliances in substation equipment. During operation, it is easy to cause insulation deterioration due to chemical, thermal and other abnormal factors, and even explosion and insulation breakdown. Further, It leads to the failure of the power system, which is not conducive to the stable operation of the power system. [0003] Therefore, those skilled in the art are devoted to developing a high-dimensional index method for evaluating the partial discharge state of a switchgear in a substation, so as to improve the efficiency and accuracy of t...

AI Technical Summary

Problems solved by technology

The switchgear is a circuit used to control and protect electrical appliances in substation equipment. During operation, it is prone to insulation degradation due to chemical, thermal and other abnormal factors, and even explosion and insulation breakdown. Further, Cause the power system to fail, which is not conducive to the stable operation of the power system

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