Modelling and analysis of bidirectional dc-dc converter

Bidirectional dc-dc converters are used a lot of industrial areas such as electric vehicles, uninterruptable power supplies, fuel cells, solar panel cells as energy sources are searched in order to improve the quality of power at the transmission and distribution lines and other areas. All of these industrial applications give importance on system loss, efficiency drop, shortening the life of circuit elements. Thus, it should be improved control systems in order to prevent power losses as far as possible and efficiency of bidirectional power flow is very important for high quality electrical energy. Owing to different types of control methods provide bidirectional power flow and each of these has different algorithm. Nowadays, these control methods are improved by increasing complexity of mathematical equations or exchanging better equipments. In the light of these works, comparing of common used control methods provides contribution to efficiency studies at bidirectional dc-dc converter literature. The main aim of this thesis work, applying different phase shift control methods on single phase isolated bidirectional full bridge dc-dc converter and comparing these control methods on efficiency way by reducing cost with or without using snubber capacitors. In this thesis, Isolated Bidirectional DC-DC Converter topology is modelled and all controllers are written by FORTRAN programming language. According to the results, it is observed that efficiency results of DPS and EPS are almost equal and higher than SPS without using snubber capacitors. This statement shows the discovered and innovative way of this thesis work. Key words: Bidirectional DC-DC Converter, Phase Shift Control Methods, Efficiency, Comparison.