Abstract

Three-port converters (TPCs) are the cost-effective way to connect the renewable source, energy-stored component and the load, and thus, can be widely used in the stand-alone renewable power system. This paper propose a new and simple non-isolated TPC family, which is obtained by embedding a general cell into the classic buck, boost and buck-boost converters. The proposed TPC family includes several advantages, such as the easy-to-derivation feature, compact size and the maximal usage of control degree of freedom. The derivation method and control strategy are presented in this paper, and a prototype is also built as an interface for a 18V photovoltaic panel, a 24V battery and a 12V/2A load. The experimental results show the validity of the analysis.

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