Design and Analysis of a 24 Vdc to 48 Vdc Bidirectional DC-DC Converter Specifically for a Distributed Energy Application

Ambrosio B. Cultura II, Ziyad M. Salameh

Mindanao University of Science and Technology, Cagayan de Oro City, Philippines.
University of Massachusetts Lowell, Lowell, USA.

DOI: 10.4236/epe.2012.45041                

Abstract

The design of a bidirectional dc-dc power converter specifically for a distributed energy application is presented. The existing two different DC voltage battery bank of the distributed generation needs to interlink each other using a bi-directional dc-dc converter in order to minimize the unbalance of the output load currents of the three inverters connected to electric grid system. Through this connection, a current can flow from one system to another or vice versa depending on which systems need the current most. Thus, unbalanced currents of the grid line have been minimized and the reliability and performance of the DER grid connected system has been increased. A detailed mathematical analysis of the converter under steady state and transient condition are presented. Mathematical models for boost and buck modes are being derived and the simulink model is constructed in order to simulate the system. Moreover, the model has been validated on the actual operation of the converter, showing that the simulated results in Matlab Simulink are consistent with the experimental ones.

Keywords

Distributed Energy Resources; Bidirectional dc-dc Converter; ELECTRIC Grid

Conflicts of Interest

The authors declare no conflicts of interest.

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