Fault detection method and system of photovoltaic module, electronic equipment and storage medium

Abstract

The invention discloses a fault detection method and system for a photovoltaic module, electronic equipment and a storage medium, and relates to the field of photovoltaic fault detection. The method comprises the steps that physical characteristic signals and performance characteristic signals of a target photovoltaic module are acquired, the physical characteristic signals comprise acoustic characteristics and optical characteristics, and the performance characteristic signals comprise electrical characteristics and thermal characteristics; performing time-frequency analysis on the physical characteristic signal to obtain a frequency domain characteristic and a spatial domain characteristic, and identifying an abnormal region based on the frequency domain characteristic and the spatial domain characteristic; determining electrothermal coupling characteristics based on the electrical characteristics and the thermal characteristics of the abnormal region; constructing a feature space by combining the frequency domain feature, the spatial domain feature and the electrothermal coupling feature, and determining a fault feature point in the feature space; and determining a fault type and a fault degree according to the distribution features of the fault feature points in the feature space, and generating a fault detection result. By implementing the technical scheme provided by the invention, the fault detection accuracy of the photovoltaic module can be improved.

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