Design and Performance of a Bidirectional Isolated Dc-Dc Converter for Renewable Power System

Abstract

This paper contributes to the steady-state analysis of the isolated bidirectional dc-dc converter. The circuit configuration of the proposed converter is very simple. The proposed converter employs a coupled inductor with same winding turns in the primary and secondary sides..Thus, the proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional DC-DC boost/buck converter. Bidirectional dc-dc converters (BDC) Have recently received a lot of attention due to the increasing need to systems with the capabilityBidirectional energy transfer betweentwo dc buses. Apart from traditional application in dc motor drives, new applications of BDC include energy storage in renewable energy systems, fuel cell energy systems, hybrid electric vehicles (HEV). The bidirectional converter, has less switching losses with zero voltage switching, and has high gain buck-boost operations.. The complete PV system with a boost dc to dc converter controller to regulate the dc link voltage, bidirectional converter based battery charge controller, and an inverter with its associated vector mode controller is implemented in the Simulink/Simpower environment.