Abstract
This article presents an impedance network based dual DC-link converter based on a consolidated control strategy to boost an input voltage and manage an energy storage simultaneously. The converter structure and control can be directly applicable for energy systems such as wind, solar, and fuel cell generation systems which include an energy storage device to insure an uninterrupted power supply. The proposed structure has several noticeable advantages such as not needing a modification of pulse width modulation in an inverter side and not producing unwanted operational modes which can occur in the conventional impedance network structure. Based on the new circuit configuration, a new consolidated control structure, which combines a dual-loop capacitor voltage control and a dual loop voltage control of the energy storage device, is designed and analyzed. The feasibility and performance of the proposed dual DC-link converter and the control method are verified by both simulations and experiments.
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