Estimação de Estados de Redes de Distribuição Desequilibradas Através do Algoritmo E-OPF

Ana F.P. da Costa; Edimar J. de Oliveira; Jhonatan S. Ferreira; Leonardo W. de Oliveira; Julio C. Stacchini de Souza; Gabriel Schreider da Silva

doi:10.20906/sbse.v2i1.2994

Ana F.P. da Costa Faculdade de Engenharia Elétrica, Universidade Federal de Juiz de Fora, MG
Edimar J. de Oliveira Faculdade de Engenharia Elétrica, Universidade Federal de Juiz de Fora, MG
Jhonatan S. Ferreira Faculdade de Engenharia Elétrica, Universidade Federal de Juiz de Fora, MG
Leonardo W. de Oliveira Faculdade de Engenharia Elétrica, Universidade Federal de Juiz de Fora, MG
Julio C. Stacchini de Souza Departamento de Engenharia Elétrica, Universidade Federal Fluminense, RJ
Gabriel Schreider da Silva Faculdade de Engenharia Elétrica, Universidade Federal de Juiz de Fora, MG

DOI: https://doi.org/10.20906/sbse.v2i1.2994

Keywords: Three-phase state estimation, Electrical distribution systems, Phasor measurement units, Smart meters, Optimal power flow

Abstract

This work presents a computational tool for State Estimation of single-phase, two- phase or three-phase electricity distribution networks. The proposed methodology considers the unbalanced network and applies the optimization algorithm for state estimation (E-OPF) from literature. Active and reactive power loads are treated as extended variables in the optimization model and are constrained by limits obtained from the system data. The objective function combines the state estimation error of the well-known Weighted Least Squares (WLS) approach with additional indexes related to state variables, which improve the state estimation process. To verify the effectiveness of the proposed technique, the simulations are performed using a 33-bus system modified to include imbalances usually found in the electrical distribution networks.