DOI:10.35833/MPCE.2022.000342 Parallel Perturbed Gauss-Newton State Estimator Based on Fortescue Transformation for Unbalanced Power Systems Page view: 0        Net amount: 163 Author: Izudin Džafić Author Affiliation: Faculty of Electrical Engineering, University of Sarajevo, Sarajevo 71000, Bosnia and Herzegovina Foundation: The work of I. D?afi? was supported by MONKS, Sarajevo, FBiH, Bosnia and Herzegovina (No. 27-02-11-41250-34/21). Abstract: This letter extends the complex-variable perturbed Gauss-Newton method to estimate the state of unbalanced power systems by exploiting the Fortescue transformation. It proposes a novel and efficient graph-based way to deal with singularities due to zero-sequence network parts bounded with delta transformer windings and isolated from the ground. The estimator can handle both phasor and complex power measurements. Compared with the standard complex-variable unbalanced state estimator, it achieves better numerical stability and a speed-up of around three times using a sequential implementation and five times using parallel execution. Keywords: Delta-windings ; Fortescue transformation ; iterative algorithms ; least-squares approximation ; parallel algorithm ; perturbation methods ; ill-conditioning ; state estimation ; symmetrical components Received:June 09, 2022               Online Time:2022/11/21 View Full Text       Download reader