Method for judging operation fault of high-voltage current transformer

The invention relates to a high-voltage current transformer operation fault discrimination method. The method comprises the following steps of collecting fault types and secondary current data of all current transformers at a plurality of measurement points; decomposing the secondary current data to obtain a first residual quantity; calculating a second residual quantity according to the secondary current data; performing residual decomposition, correlation analysis and clustering analysis on the first residual quantity and the second residual quantity to obtain a fault component corresponding to each fault type; splicing the fault components, and extracting features by a model to obtain features corresponding to each fault type; obtaining the feature vector of the fault current transformer through the secondary current data A and the features corresponding to the fault types; constructing a current transformer fault classification model through the graph convolutional neural network; and performing fault jud