Identification system applied to the characterization of the input impedance of cascaded dc-dc converters

Distributed power systems have several interesting advantages compared to centralized power systems. However, they present a complex dynamic behavior due to the interaction of the multiple converters, and the stability becomes a main issue during the design stage. The stability criteria usually depend on the small-signal output and input impedance models of the converters. Knowing these impedances require analysis or measurement. However, thanks to the digital implementation of the control stage, new features have been included in the converters, like identification techniques to auto-tune the compensator or system monitoring. In this work, we explore the use of a front-end converter with an implemented identification system to estimate the input impedance of its load. One of the main advantages of this approach is the measurement of the impedance in the real implementation of the system.