Integration of renewable energy resources in off GRID system using three port zeta converter

Abstract

In recent years, the demand for electrical energy has increased drastically which is not met by the conventional energy resources. Hence renewable energy has now come into existence because of pollution free, economical features etc. In order to make use of the power from these renewable sources efficiently, designing of single stage power converter is inevitable. Therefore this paper proposes a novel three port, bidirectional, non-isolated dc-dc converter based on ZETA topology. Featuring the advantages of zeta such as increased or decreased output voltage, very low output voltage ripple, the zeta-zeta topology has been implemented in this paper. The proposed converter has two inputs and a single output which makes it suitable in hybridizing the various energy resources. The operating modes and steady state analysis of the converter are discussed in detail. The small signal analysis of the proposed converter is investigated to design the converter. The topology thus generated is simulated in MATLAB platform to verify the analytical results. A laboratory prototype model is developed which verifies the feasibility of the designed converter.