Multiport Converter Topology for Hybrid System Using PI Controllers

Abstract: Renewable energy sources such as Fuel-Cells, Photo-Voltaic (PV) arrays are increasingly using in automobiles, residential and commercial buildings. For stand-alone systems energy storage devices are required for backup power and fast dynamic response. A power electronic converter interfaces the sources with the load along with energy storage. Existing converters for such applications use a common dc-link, which employ multiple converters. Proposed system in this paper is a systematic method for deriving three-port converters (TPCs) from the full-bridge converter (FBC). The three port converter features single stage conversion between any two of the three ports, higher system efficiency, fewer components, faster response and compact packaging. The proposed FB-TPC consists of two bidirectional ports and an isolated output port. The primary circuit of the converter functions as a buck-boost converter and provides a power flow path between the ports on the primary side. The FB-TPC can adapt to a wide source voltage range. Here MATLAB using Simulink and SimPower System set toolboxes is used for software implementation.

Keywords: Photo-Voltaic (PV), Boost-buck, dc-dc converter, full-bridge converter (FBC), renewable power system, three- port converter (TPC)