Estimação de Estados de Redes de Distribuição Desequilibradas Através do Algoritmo E-OPF
Keywords: Three-phase state estimation, Electrical distribution systems, Phasor measurement units, Smart meters, Optimal power flow
AbstractThis 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.