A contribution for modeling controlled and uncontrolled AC/DC converters in harmonic power flows

The main object of this paper is to present a sequential method of adjusting the operating point of power converters within the framework of harmonic power flows. To do this, a unified formulation of previous work in the frequency domain has been developed, resulting in a set of compact and powerful analytical expressions for AC and DC magnitudes. Special attention has been paid to uncontrolled rectifiers. The proposed sequential method offers a more flexible and modular framework where AC and/or DC magnitudes can be used for defining the operating point. Moreover, it provides better convergence properties for iterative harmonic analysis (IHA). Newton´s method or Gauss´s method can be applied for IHA without special considerations. Finally, the solution obtained has been verified by means of time domain simulation and measurements