Reconstruction of Low-Voltage Networks with Limited Observability

This work addresses the problem of reconstructing topology and cable parameters of three-phase low-voltage networks when no a priori information about them is provided and not all the nodes in the grid are equipped with smart meters. This paper presents a methodology to obtain an estimation of the electrical model of each phase of the network, analysing voltage and current time-series measurements provided by the available meters. The proposed methodology involves an iterative algorithm developed to tackle the network reconstruction problem when unmetered nodes are located reasonably far from each other. The algorithm is tested on a 30-node network with different sets of metered nodes, providing relevant solutions in most scenarios having more than 80% of metered nodes.