A Robust Passive Power-based Control Strategy for Three-phase Voltage-source Rectifiers

In this paper, robustness of the damping injection schemes for passivity based control (PBC) of the three-phase AC/DC voltage-source (Boost type) rectifier is studied. The idea is to extend the tuning strategy for PBC that is presented in (Jeltsema and Scherpen, 2004) for DC/DC converters to three-phase AC/DC rectifiers. In the DC/DC converter case this tuning strategy leads to a PBC scheme with parallel damping injection that is robust against load perturbations. Straightforward application of this scheme to the three-phase AC/DC Boost rectifier, however, does not immediately lead to such robust closed loop system. A closer analysis reveals that first a pre-compensation should be done so that the AC input stage connected to the DC output stage is converted into two DC input stages connected to the DC output stage. Then, the PBC parallel damping injection scheme can be applied resulting in a closed-loop system that is robust against load variations. Copyright © 2005 IFAC