A Power Flow Method for Unbalanced Three-Phase Distribution Networks with Nonlinear Loads

This paper presents the results of power flow calculations in unbalanced three-phase radial distribution networks with nonlinear loads obtained using the decoupled harmonic power flow (DHPF) method. The method is based on three-phase models of distribution network components and the current injection technique. Performances of the method are evaluated on the standard IEEE 13-bus test network. The DHPF method is verified by comparing its results with those generated by the software tool for the analysis of transmission, distribution, and industrial electrical power systems (i.e., DIgSILENT PowerFactory). It is shown that the DHPF method for solving the harmonic power flow (HPF) problem in unbalanced three-phase distribution networks provides effective and high-quality solutions.