融合Transformer与生成对抗网络,提升风机时序数据异常检测精度。
Trans GAN-WT: A Feature Extraction and Interactive Learning-Based Anomaly Detection Model for Wind Turbine Time Series Data
- 用自回归特征提取增强模型稳定性和泛化能力。
- 通过放大重建误差,降低微小偏差异常的漏检率。
- 支持多时序尺度交互学习,有效减少时间冗余,适合风电运维场景。
随着风电场规模扩大,风机运维成本持续上升。为降低运维成本、提升系统可靠性,在故障发生前实现早期状态监测与异常检测至关重要。现有方法难以在含大量冗余信息的数据中有效建模关联性,且无法合理利用有价值异常数据。为此,本文提出一种融合Transformer与生成对抗网络的异常检测模型(TransGAN-WT)。首先通过放大重建误差降低微小偏差异常的漏检率;其次采用自回归推理提取多模态特征,提升训练稳定性与泛化能力;最后构建时序特征提取模块,促进不同时间尺度特征的交互学习,有效减少时间冗余。在多个真实风机数据集上的实验表明,TransGAN-WT平均F1得分为96.10%,比多种先进基线方法分别高出5.84%和2.89%;同时实现0.06%的误报率,经威尔科克森符号秩检验验证性能显著优于现有方法,有效保障风机稳定运行。
原文摘要 · Abstract (English)
With the increasing scale and number of wind farms, wind turbines' daily operation and maintenance costs are increasing. To reduce operation and maintenance costs and enhance the reliability of wind turbine and system operation data before reaching catastrophic failures, monitoring the operating status of the equipment and detecting failures at an early stage is crucial. It is of great practical significance to utilize the working condition data for abnormal assessment of the operating status of wind turbines to realize abnormal monitoring of the operating status of wind turbines. However, the existing anomaly detection methods can neither perform effective relational modeling in data filled with a large amount of redundant information nor reasonably utilize the valuable anomaly data. For this reason, this paper proposes an anomaly detection model that fuses a Transformer and a generative adversarial network. Firstly, it reduces the leakage detection rate of minor deviation anomalies by amplifying the reconstruction error. Secondly, it uses autoregressive inference to extract multimodal features to enhance the stability and generalization ability of training. Finally, the temporal feature extraction module is constructed to promote the interactive learning between features of different time scales and effectively reduce the time redundancy. The results of multiple sets of experiments conducted on real WTG datasets show that TransGAN-WT achieves an average F1 score of 96.10% across multiple wind turbine datasets, which is 5.84% and 2.89% higher than several other state-of-the-art baseline methods. It also realizes a false positive rate (FPR) of 0.06%, and is verified by the Wilcoxon signed-rank test to have achieved a statistically significant performance enhancement compared to the state-of-the-art baseline methods, effectively ensuring the stable operation of wind turbines.
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