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Classification of Electric Vehicle Charging Time Series with Selective Clustering

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We develop a novel iterative clustering method for classifying time series of EV charging rates based on their "tail features". Our method first extracts tails from a diversity of charging time series that have different lengths, contain missing data, and are distorted by scheduling algorithms and measurement noise. The charging tails are then clustered into a small number of types whose representatives are then used to improve tail extraction. This process iterates until it converges. We apply our method to ACN-Data, a fine-grained EV charging dataset recently made publicly available, to illustrate its effectiveness and potential applications.

Author(s):

Chenxi Sun    
The University of Hong Kong
Hong Kong

Tongxin Li    
Caltech
United States

Steven Low    
Caltech
United States

Victor O.K. Li    
The University of Hong Kong
Hong Kong

 

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