1. A method comprising: clustering multiple voltage time series measurements into multiple groups based on one or more distance metrics comprising at least (i) a distance metric that associates each of multiple voltage time series measurements with one of multiple sub-circuits, and (ii) a distance metric pertaining to distance between each of the voltage time series measurements that are associated with the same one of the multiple sub-circuits, wherein said multiple voltage time series measurements are derived from one or more sensors; determining a connectivity model of the multiple groups, wherein said determining comprises inferring multiple connectivity relationships based on said clustering; comparing the determined connectivity model to an existing connectivity model to detect one or more inconsistencies between the determined connectivity model and the existing connectivity model; and updating the existing connectivity model based on said one or more detected inconsistencies; wherein at least one of the steps is carried out by a computing device.