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In this paper, a cascading failure interaction learning method is proposed for real utility outage data. For better revealing the structure, we reorganize the failure interaction matrix based on Louvain community detection. A deep convolutional generative adversarial network (DCGAN) based method is then proposed to learn the implicit features for failure propagation in the interaction matrix. A systematic method is further developed to evaluate the performance of the learning method on missing interaction recovery and new interaction discovery. The effectiveness of the proposed method is validated on the 14-year real utility outage data from Bonneville Power Administration.more » « less
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Estimated component failure interactions from utility outage data can capture the general failure propagation patterns and help identify key components of a power system. Conventionally, utility outages are grouped into cascades and generations according to inter-outage time based on arbitrarily chosen thresholds. In this paper, we propose an optimal decomposition approach for utility outage data. By approximating the temporal pattern of the outage sequence by a Poisson process, an adaptive generation duration threshold is calculated to group the generations for each cascade. Compared to the conventional method, the proposed method can reveal more failure interactions and mitigate heterogeneity. The results based on real utility outage data demonstrate the effectiveness of the proposed optimal decomposition approach.more » « less
