The performance of fault diagnosis systems is highly affected by data quality in cyber-physical power systems. These systems generate massive amounts of data that overburden the system with excessive computational costs. Another issue is the presence of noise in recorded measurements, which prevents building a precise decision model. Furthermore, the diagnostic model is often provided with a mixture of redundant measurements that may deviate it from learning normal and fault distributions. This paper presents the effect of feature engineering on mitigating the aforementioned challenges in cyber-physical systems. Feature selection and dimensionality reduction methods are combined with decision models to simulate data-driven fault diagnosis in a 118-bus power system. A comparative study is enabled accordingly to compare several advanced techniques in both domains. Dimensionality reduction and feature selection methods are compared both jointly and separately. Finally, experiments are concluded, and a setting is suggested that enhances data quality for fault diagnosis.

探讨了特征工程对于解决物理系统数据诊断过程中存在的数据质量，噪声干扰，决策模型不精确等挑战的影响作用；论文使用特征筛选、降维和决策模型等方法，在118个节点的电力系统上进行了数据驱动的故障诊断，同时比较了多种高级技术在该领域的应用。实验结果表明，特征筛选和降维方法的联合应用可以有效提高数据质量，提高物理系统的诊断准确性。

利用高维度的物理-数字数据流来诊断智能电网故障