基于CWT-CBAM-CNN的配网接地故障选线方法

Distribution Network Grounding Fault Line Selection Method Based on CWT-CBAM-CNN

摘要: 针对配网单相接地故障特征提取困难，且现有选线方法选线精度不高的问题，提出了一种连续小波变换(continuous wavelet transform, CWT)和CBAM-CNN的故障选线方法。首先，对零序暂态电流进行连续小波变换获取对应的时频灰度图像；然后，构建了融合CBAM的CNN故障检测模型，使模型更加关注有效信息。仿真结果表明，所提方法的选线精度为99.45%，与CNN相比，具有较强的鲁棒性。

Abstract: Aiming at the problem that the fault feature extraction of single-phase grounding fault in distribution network is difficult and the accuracy of fault line selection is not high, a fault line selection method based on continuous wavelet transform (CWT) and CBAM-CNN is proposed. Firstly, the corresponding time-frequency gray image is obtained by continuous wavelet transform of zero-sequence transient current. Then, a CNN fault phase detection model with CBAM is constructed, which makes the model pay more attention to effective information. The simulation results show that the line selection accuracy of the proposed method is 99.45%. Compared with CNN, it has strong robustness.