Non-Overshooting Controller for High-Power Multi-Port DC-DC Converters

Abstract

The trend toward generating electricity from Renewable Energy Sources (RESs) has encouraged the researchers to investigate more reliable and efficient ways of combining various sources, storage systems, and loads with different voltage ratings. This has led to the development of the multiport DC-DC converter, which provides a localized energy processing model with a centralized controller. This paper studies the operation and characteristics of the multiport converter, specifically for medium-voltage and high-power RES applications. The steady-state and 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 employed to obtain the linearized model of the multiport DC-DC converter. Non-overshooting state feedback is designed and implemented for a five-port converter, and its performance is compared with the conventional optimal control scheme.