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When operating in island mode, DC-based microgrid mainly starts up through batteries and bidirectional DC-DC converters. In conventional way, an extra start-up circuit is required to limit the surge current, which not only decreases the efficiency but also increases the cost. In this paper, the generation mechanism of the surge current is analyzed, through which the duty cycle control scheme is proposed...
A novel interleaved high step-up converter is proposed in this paper to satisfy the high power and high step-up conversion requirements. The interleaved structure is applied to reduce the input and output current ripples, which is helpful to reduce the impact to the filter capacitors. A voltage gain extension cell based on the coupled inductors is introduced in the conventional interleaved boost converter...
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