Analysis and Control of Current-Fed Integrated Dual-DC Boost Converter Topology

Abstract

This article introduces a dual-input single-output dc–dc power electronic converter topology to interface two independent sources into a common output. The proposed converter is denoted as integrated dual-dc boost converter (IDDBC), and this topology provides step-up conversions for both inputs using three controllable switches. Due to its architecture, IDDBC can be adapted to provide uninterrupted power (realizing a dispatchable system) even if any one of the two input sources are unavailable or has significant output power variation. The steady-state analysis, modeling, and design of the converter are presented, and a pulsewidth-modulation control scheme is proposed. The closed-loop control system for the converter consists of voltage-mode control for output and current-mode control for one-source input current. The behavior of converter operation is validated through experimentation on a digital-signal-processor-based laboratory prototype.