(1.Huawei Shengteng Laboratory， Anhui Nari Ji Yuan Power Grid Technology Co.， Ltd.， Hefei 230000， China； 2.School of Electronics and Information Engineering， Nanjing University of Information Science and Technology， Nanjing 210044， China； 3.College of Electronic Information Engineering， Wuxi University， Wuxi 214105， China)
Abstract： Abstract： In view of the complex structure and high maintenance cost of transformers, this paper proposes a transformer fault signal recognition algorithm based on deep learning. Firstly, the voiceprint signal under the working condition of the transformer is analyzed and the two-dimensional image signal is converted. Based on the advantages of VGG16 neural network in the image, a MCA attention mechanism is proposed, which can retain both background information and detail information. Secondly it optimizes the maximum pooled down sampling in VGG16, and adopts a soft pooled sampling method to reduce the feature loss caused by the maximum pooled down sampling in the image. Finally, in order to avoid the occurrence of over fitting, the activation function in the top structure of VGG16 is optimized, and the SELU activation function that can be self normalized is quoted. The experiment proves that the generalized S-transform is the best choice for converting one-dimensional time-domain signal to two-dimensional image signal, and the average recognition rate of the proposed algorithm for six types of fault signals reaches 99.15%.
Key words : VGG16 network；generalized S-transform；transformer fault signal
