基于MobileNet的变压器特高频局部放电类型识别方法

UHF PARTIAL DISCHARGE TYPE RECOGNITION METHOD OF TRANSFORMER BASED ON MOBILENET

  • 摘要: 针对基于边缘计算的变压器局部放电在线监测系统需求,提出了一种基于MobileNet的局部放电类型识别方法。对变压器特高频局部放电传感器采集到的各类局部放电PRPD图谱进行预处理与数据增强,形成训练数据集;将预先训练好的MobileNet模型权值迁移到局部放电识别任务中,进行网络结构和权值的微调;训练迁移后的新模型,将识别率最高的模型作为测试模型,并对测试数据集进行测试。将本方法应用于变压器特高频局部放电智能传感器上,能够实现局部放电缺陷类型识别的边缘计算,识别准确率达到95%以上,且不受图谱工频相位平移的影响。

     

    Abstract: Aiming to realize edge computing on transformer UHF partial discharge monitoring, a method based on MobileNet is proposed. The various PRPD patterns collected by transformer UHF partial discharge monitoring systems are pre-processed and data-enhanced to form PRPD pattern datasets. The weights in the pre-trained MobileNetV1 model are transferred to the new task of partial discharge, and the network structure and weights of the model are fine-tuned. The new model after migration is trained, the model with the highest recognition rate is used as the test model, and the PRPD patterns in the test set are tested. The experiment shows that the recognition accuracy of the algorithm is more than 95%, and is not influenced by the phase shifting of PRPD.

     

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