M. Picallo, A. Anta, B. De Schutter, and A. Panosyan, "A two-step distribution system state estimator with grid constraints and mixed measurements," Proceedings of the 20th Power Systems Computation Conference, Dublin, Ireland, June 2018.
In this paper we consider the problem of State Estimation (SE) in large-scale, 3-phase coupled, unbalanced distribution systems. More specifically, we address the problem of including mixed real-time measurements, synchronized and unsynchronized, from phasor measurement units and smart meters, into existing SE solutions. We propose a computationally efficient two-step method to update a prior solution using the measurements, while taking into account physical constraints caused by zero-injection buses. We test the method on a benchmark test feeder and show the effectiveness of the approach.