IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 7, JULY 2010 1877
An Integrated Four-Port DC/DC Converterfor Renewable Energy Applications
Zhijun Qian
, Student Member, IEEE
, Osama Abdel-Rahman
, Member, IEEE
, and Issa Batarseh
, Fellow, IEEE
Abstract
—This paper proposes a novel converter topology that interfaces four power ports: two sources, one bidirectional stor-age port, and one isolated load port. The proposed four-port dc/dc converter is derived by simply adding two switches and two diodes to the traditional half-bridge topology. Zero-voltage switching is realized for all four main switches. Three of the four ports can be tightly regulated by adjusting their independent duty-cycle values,while the fourth port is left unregulated to maintain the power bal-ance for the system. Circuit analysis and design considerations a represented; the dynamic modeling and close-loop design guidance are given as well. Experimental results verify the proposed topol-ogy and confirm its ability to achieve tight independent control over three power-processing paths. This topology promises signif-icant savings in component count and losses for renewable energy power-harvesting systems.
Index Terms
—DC–DC converter, half-bridge, multiple-inputsingle-output (MISO), multiport, zero-voltage switching (ZVS
