Harmonic and interharmonic distortion modeling in multiconverter systems

The problem of modeling multi-power converter systems in presence of harmonic and interharmonic distortion is considered. Specifically, current source rectifiers are considered as distortion sources, some supplying DC motors and the remaining supplying inverters feeding AC machines. The classical analogue, frequency domain and time domain models proposed in the literature to study harmonic distortion in a multi-power converter system are considered and, for each model, suitable extensions to include the interharmonic distortion are presented and critically analysed. The results of several experiments are reported to show the usefulness and to compare the accuracy of the different extensions considered