Switching Schemes of the Bidirectional Buck-Boost Converter for Energy Storage System

This work explores the use of dual-carrier switching modulation schemes for bidirectional buck-boost converters. The buck-boost scheme is utilized as the power converter topology to interface a storage system to a DC-link in electrical vehicles (EVs) and hybrid electric vehicles (HEVs). This topology has the ability to protect the energy storage devices in case of the short-circuit fault at the DC-link. The proposed control strategy decreases the switching losses of the converter under the standard modulation scheme, and also improves the dynamic response of the system by adjusting the static characteristics. The target control is validated through simulations.