ZENG Xiangjun,FENG Chen,YANG Ming,et al.Data Anomaly Detection Method for Wind Turbines Considering Operation State Similarity[J].Automation of Electric Power Systems,2022,46(11):170-180.
ZENG Xiangjun,FENG Chen,YANG Ming,et al.Data Anomaly Detection Method for Wind Turbines Considering Operation State Similarity[J].Automation of Electric Power Systems,2022,46(11):170-180. DOI: 10.7500/AEPS20210821002.
Data Anomaly Detection Method for Wind Turbines Considering Operation State Similarity
A method for improving the accuracy of anomaly detection results is proposed by using the supervisory control and data acquisition (SCADA) data of wind turbines with similar operation state in wind farms. Firstly
a similarity comparison principle of operation state for wind turbines is proposed based on the analysis results of actual data
and a similarity evaluation method of operation state is proposed based on the mutual information feature selection algorithm and the iterative self-organizing data analysis clustering algorithm. Secondly
considering the temporal dependence of state variables
a deterministic estimation model based on the support vector machine is constructed by the historical SCADA data of the wind turbines to be tested. A combined probability estimation model based on kernel density estimation is also built by the historical SCADA data of the wind turbines with similar operation state. Furthermore
the deterministic estimation model and the combined probability estimation model are used for self-inspection and external-inspection of the abnormal states of the target variables
respectively. The accuracy and reliability of anomaly detection results can be improved by verifying the two detection results. Finally
the feasibility and accuracy of the proposed method are verified based on the SCADA data of all wind turbines in a wind farm and comparative experiments.
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