Multifractal Characterization of Distribution Synchrophasors for Cybersecurity Defense of Smart Grids

Yi Cui, Feifei Bai, Ruifeng Yan, Tapan Saha, Mehdi Mosadeghy, Hongzhi Yin, Ryan K L Ko, Yilu Liu
2021 IEEE Transactions on Smart Grid  
Source ID Mix" spoofing emerged as a new type of cyber-attack on Distribution Synchrophasors (DS) where adversaries have the capability to swap the source information of DS without changing the measurement values. Accurate detection of such a highly-deceptive attack is a challenging task especially when the spoofing attack happens on short fragments of DS recorded within a relatively small geographical scale. This letter proposes an effective approach to detect this cyber-attack by realizing
more » ... multifractal characteristics of DS measurements. First, the multifractal cross-correlation of DS measured at multiple intra-state locations is revealed. Then the derived correlation is integrated with weighted two-dimensional multifractal surface interpolation to reconstruct quasi highresolution signals. Finally, informative location-specific signatures are extracted from the high-resolution DS and they are integrated with advanced machine learning techniques for source authentication. Experiments using the real-life DS are performed to verify the proposed method.
doi:10.1109/tsg.2021.3132536 fatcat:tjriioht7jfpdag7hs2ki3llky