Abstract
AC/DC converters generate harmonic currents in power systems. A detailed analysis of harmonic currents produced by AC/DC power converters under nonideal operating conditions can be quite time consuming. In this paper, a simple analytical method is proposed for calculating harmonic currents produced by a twelve-pulse AC/DC thyristor converter under unbalanced supply voltage. Simplified models of magnitudes and phase angles of harmonic currents are derived as function of complex voltage unbalanced factor assuming equidistant phase angle control. Simulation results are presented to confirm the validity of the analytical method.
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