High‐gain dual‐input multiple‐output ( DIMO ) boost converter for low‐power grid‐connected microinverter applications

Abstract

Summary In this paper, a novel solar‐powered dual‐input multiple‐output (DIMO) DC–DC converter is proposed to feed the power demanded by the grid‐connected three‐phase three‐level (TPTL) T‐type inverter. The concept is to utilize the two coupled inductors, four capacitors, and one three‐winding high‐frequency transformer. The converter is designed to accept two different inputs and to provide three outputs. Two of its output ports are utilized to charge the two battery banks and another one is used to provide the power for the TPTL T‐type inverter at the required level. The coupled inductors and capacitors are made to discharge their stored energy in series with the primary of the three‐winding high‐frequency transformer to achieve high step‐up voltage gain. Besides, fuzzy logic controller (FLC)‐based DC‐link voltage controller and Synchronous Reference Frame (SRF) theory controllers are incorporated to reduce the ripple content in the DC and AC voltages. The different operating modes and steady‐state analyses are presented. Finally, the results of simulated and experimental prototype models are presented to verify the boosting ability and efficiency of the proposed converter.

Stacked Input-Output High Step-Up Buck-Boost DC-DC Converter with Coupled Inductor and Voltage Multiplier

“…is set of factors makes the conduction losses in the converter components high. Consequently, the boost converter does not perform well for high voltage gain applications [13][14][15][16][17][18][19].…”