Open AccessThe neutral‐earth‐voltage ( NEV ) system state estimation model
Author(s) -
De OliveiraDe Jesus Paulo M.,
Celeita David F.,
Ramos Gustavo A.
Publication year - 2020
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/2050-7038.12505
Subject(s) - voltage , ground , electrical impedance , computer science , earthing system , engineering , electrical engineering
Summary Next‐generation distribution systems will be characterized by higher unbalanced currents due to increased asymmetrical currents produced by fast charging of electric vehicles and high short‐circuit currents under meshed operation. The unbalanced currents flowing through earthing impedances produce neutral‐earth voltages (NEVs) that may compromise the security (IEEE 62.92) and the safety (IEEE 80) of the system. Existing PMU‐based distribution system state estimation (PMU‐DSSE) methods described in literature are unable to estimate neutral‐earth voltages. To fulfill the research gap, this paper presents a new PMU‐DSSE formulation capable to estimate NEVs taking advantage of the OpenDSS's multiphase network model. The proposed procedure was successfully applied in two well‐known NEV test cases modeled in the OpenDSS platform.