A power decoupling method based on four-switch three-port DC/DC/AC converter in DC microgrid

This paper presents a power decoupling method based on a novel four-switch three-port DC/DC/AC converter in DC microgrid, which can restrain the low-frequency ripple power caused by the single-phase inverter. The proposed topology is compact and cost effective in consideration of that no extra switches or devices are required compared with. With the model of the proposed DC/DC/AC converter, the power decoupling control method is analyzed and the parameters are designed as well. Experimental results on the laboratory prototype verified the feasibility of the proposed power decoupling method and the availability of parameters design.