Analysis of the AC-DC Harmonic Interaction Between the Power Network and Uncontrolled 6 Pulse Rectifiers Working in the Discontinuous Conduction Mode Using Newton’s Method

This paper summarises a study completely developed in for the analysis of AC-DC harmonic interaction between the power network and non-controlled three-phase rectifiers operating in discontinuous mode. The presented method is an adaptation for the case of uncontrolled three-phase rectifiers of the procedure designed by Smith and Arrillaga for the analysis of three-phase controlled rectifiers. The new algorithm has been developed in the frequency domain, and therefore introduces some important advantages for overall power system analysis. The influence of factors such as unbalance or harmonic distortion in the power supply voltage, harmonic distortion in the DC side voltage and unbalance in the AC side filtering reactances can easily be analysed. Moreover, a very flexible modelling of the circuits in both the DC and AC side can be achieved with a minimum effort