Design and analysis of two-input DC-DC converter used in low voltage DC-grid applications

The paper brings into depiction a novel two input DC-DC converters topology, for DC micro-grid applications. The paper proposes a topology which is capable of providing excessive bucking with one source and also boosting operation. On account of excessive stepping down of the input dc voltage the converter uses additional energy storage components and hence it belongs to seventh order family. The proposed converter regulates the power flow between input de sources and dc micro-grid either individually or collectively at a reduced source ripple. The digital voltage regulation while the current controller is used, for second input DC source, to ensure load division. A 72/ 36 V to 24 V, with power capacity of, 150 ~ 300W dc low voltage micro-grid is designed to validate the proposed concept. The theoretical analysis is validated through simulations.