Distribution Network Topology Identification by PMU-based State Estimation

This paper introduces an extension of an algorithm for fault detection and localization in active radial distribution networks based on state estimation and phasor measurement devices. This work takes into account the possibility of changing the network topology through switching devices, usually as a consequence of the protection system triggering after a fault occurrence. Therefore, an automatic topology estimation method is developed to be run together with the fault detection and localization algorithm. Hence, this work calls back the same assumptions in terms of optimal measurement device placement and observability to have the algorithm work properly with a reduced number of metering devices respect to the number of nodes of the network. The approach is validated through simulations carried out on a benchmark radial distribution network.