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Partial discharge fault diagnosis based on optimized BI-LSTM

Long-term partial discharge (PD) can lead to equipment insulation failure, resulting in huge economic losses, and PD signals are difficult to capture. In order to improve the reliability of partial discharge, this paper proposes a PD classification algorithm based on bidirectional long short-term memory network and attention mechanism (BI-LSTM-Attention). This method takes the PD signal as input, uses the BI-LSTM network to extract the features of the sequence before and after. Combined with the attention mechanism to adjust the feature weight, and finally through the sigmoid activation function to classify the results into two categories, get the PD recognition results. Tested on the ENET public dataset, the experimental results show that compared with the traditional long short-term memory network (LSTM), the loss rate and accuracy rate of the classification results are better, indicating that the proposed model based on BI-LSTM-Attention is more effective for classification tasks, which reflects the superiority of the algorithm.