High gain fourth-order boost converter for DC-grid applications

Abstract

A fourth-order boost point of load converter capable of giving a higher voltage gain similar to fourth-order converters is proposed in this paper. In view of the higher boosting feature, the converter is more suitable to interface the given low voltage source to the high-voltage dc-bus. Component design expressions are formulated through a steady-state analysis. The boosting factor of the proposed converter is higher than the traditional boost and other reported fourth-order boost converters. These boosting features are demonstrated through a steady-state analysis, and also in simulations. Discrete-time analysis is established to formulate transfer functions required to design the controller in the z-domain. The proposed fourth-order converter features are demonstrated through simulations and then compared with sample experimental observations.