| Abstract | The trend toward generating electricity from renewable energy sources has
encouraged researchers to work on finding more reliable and efficient ways of combining
various sources, storage systems, and loads with different voltage ratings. Using the
conventional structure of integrating multiple sources is proven to be less efficient and
more expensive. This has led to the development of the multiport DC-DC converter, which
provides a localized energy processing model with a centralized controller. This research
studies the operation and characteristics of the multiport DC-DC converter, specifically for
medium-voltage and high-power applications. The steady state and the dynamical
modeling of the multiport DC-DC converter are presented in this work. A mathematical
representation of the average current model is derived, and it is used to obtain the linearized
model of the multiport DC-DC converter. Non-Overshooting state feedback controller is
designed and implemented for a five-port converter, and its performance is compared with
the conventional optimal control scheme. In addition, fault analysis is carried out by
studying the system response under different fault scenarios and evaluating the controller’s
ability to adjust the power flow between the ports. |
