Keywords:
Distribution networks, Power flow, Power sum method
Abstract
the power sum method (PSM) is very accurate for solving the power flow and has a fast convergence in radial networks. Its formulation represents the power balance in terms of the power flows in the lines. This facilitates its application in the optimal power flow model by composing part of the set of equality constraints. As the conventional PSM uses a positive sequence representation and the distribution networks are three-phase and unbalanced, then, in this work, an expansion of its fundamental equation of the PSM is proposed to calculate the three-phase nodal voltages. The process of evaluating the accuracy of the proposed formulation is comparatively carried out through the solution of the power flow under an unbalanced three-phase distribution network of 135 buses.
