RIBEIRO, D. L.; http://lattes.cnpq.br/8710263091638187; RIBEIRO, Dagoberto Lourenço.
Résumé:
A load flow solution method based on the first iteration of Newton's method
and mesh analysis is proposed. Initially, a model for solving radial systems is
developed. For meshed systems, the links are neglected at first and the system
equations are solved avoiding matrix assembling and inversion. Afterwards,
the links are included as radial branches in which the power must be
computed in order to impose equivalence with the original system. A set of
linear equations for updating the variables is obtained by performing variable
transformations. Voltage controlled buses (PV buses) are modeled as voltage
drops between the PV bus and the slack bus. Aggregating this adjust to the
model, the robustness was increased with respect to the unadjusted case. I f
one includes only the reactive power of PV buses on the updating process the
prior gain in linearity is held. Voltage control by transformer tap changing is
also modeled. In this case, equations are solved apart the updating process,
avoiding additional burden. The proposed method was implemented and some
tests were performed with several realistic distribution systems and IEEE-14,
30 and 57 busbars test systems. The results were compared with those
obtained using the FDLF method. The proposed method showed an excellent
performance for distribution systems and a reasonable one for IEEE testsystems.
