The invention discloses a cable damp fault diagnosis method and
system based on
machine learning, and relates to the technical field of intelligent monitoring of
power equipment. According to the method, key dimension information such as
partial discharge, temperature distribution and leakage current is integrated through multi-
source data feature-level deep fusion, the complementary value of each
data source is accurately captured in combination with an attention mechanism, and then through the collaborative architecture of the multi-scale
convolutional neural network and the bidirectional LSTM, the multi-scale
convolutional neural network and the bidirectional LSTM are integrated. Meanwhile, local detail features and long-time-history space-
time correlation features of the signals are mined, fine recognition of the damp state is achieved, data deep correlation is effectively mined, the early damp recognition accuracy can reach 95% or above, the SHAP
interpretability analysis technology is innovatively integrated, the contribution degree of each feature to the diagnosis result is quantified, and the diagnosis accuracy is improved. And a visual feature importance thermodynamic diagram and a decision
path diagram are generated, physical significance interpretation of a diagnosis basis is provided in combination with the insulation characteristics of the
power equipment, and targeted operation and maintenance suggestions are directly output.