基于电磁线圈仿真电流特征迁移学习的操作机构状态识别

State Recognition of Operating Mechanism Based on Transfer Learning of Simulated Electromagnetic Coil Current Features

  • 摘要: 配电开关柜操动机构的状态识别对电网的安全至关重要,电磁线圈电流包含了大量操作机构的状态信息,能够反映操作机构的运行状态,针对10 kV配电开关柜操作机构中电磁线圈与锁扣机构的典型故障,提出一种基于电磁线圈仿真与电流特征迁移学习的操作机构状态识别方法。通过ANSYS Maxwell建立三维瞬态多物理场耦合仿真模型,模拟线圈接触电阻增大和锁扣卡涩故障工况,分析电流波形特征并构建联合特征集。为了解决仿真数据与实际数据分布差异问题,使用混合核迁移成分分析方法,结合动态正则化处理与伪标签迭代优化策略,实现仿真特征向实际场景的跨域迁移。试验结果表明,所建仿真模型平均误差低于10%,验证了模型的准确性;基于迁移成分分析的K近邻(K-nearest neighbors,KNN)算法在实际数据中状态识别准确率达94.67%,为操作机构状态识别提供了高准确率、低数据依赖的解决方案,具有良好的工程应用潜力。

     

    Abstract: The state recognition of distribution switchgear operating mechanisms is crucial for power grid safety. The current of the electromagnetic coil contained a wealth of status information about the operating mechanism, which can reflect its operational condition. Aiming at the typical faults in electromagnetic coils and latching mechanisms of 10 kV distribution switchgear operating mechanisms, a state recognition method is proposed, utilizing electromagnetic coil simulation and current characteristic transfer learning to analyze the operating mechanism status. A three-dimensional transient multi-physics coupling simulation model is established using ANSYS Maxwell. Two kinds of faults are considered including the increase of coil contact resistance and latch jamming. Current waveform characteristics are analyzed under these state scenarios, and a joint feature set is constructed based on the extracted parameters. To solve the distribution discrepancy between simulation data and real data, a hybrid kernel transfer component analysis(TCA) method is proposed. The method integrates dynamic regularization processing and a pseudo-label iterative optimization strategy. These techniques enable effective cross-domain transfer of simulation features to real-world scenarios. The experimental results show that the simulation model has an average error below 10%, which verifies the model's accuracy. The TCA-based K-nearest neighbors(KNN) algorithm achieved a state identification accuracy of 94.67% in real data. This provides a high-accuracy and low-data-dependent solution for operating mechanism state recognition and has great potential for engineering application.

     

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