Abstract
A high number of research work is being carried out in the field of DC-DC converters to improve the performance of microgrid operation. The DC microgrid has a high level of acceptance because of the integration of renewable energy sources. In DC Microgrid, there is a need for improved DC-DC converter topologies which offer high gain, small size, enhanced efficiency, reduced voltage stress and reduced component count etc. A new Triple-Mode Active-Passive Parallel Intermediate Links (TM-A2P-IL) converter is proposed in the paper. The A2P-IL is designed by a combination of an inductor, capacitor, diode, and control switch. The proposed converter is derived by inserting A2P-IL in conventional boost converter. The proposed TM-A2P-IL converter operates in three modes and provides a high voltage gain without using a transformer, voltage multiplier stages, coupled inductor, switched inductor/capacitor circuitry. The other benefits of the proposed TM-A2P-IL converters are flexibility in the selection of duty cycles, reduced voltage stress of devices, small reactive components, single-stage power conversion. The proposed converter circuit, operating principle, steady-state analysis is studied for both CCM and DCM, discussed. The comparison between available similar type converters and the proposed converter is provided. The operation and performance of the proposed A2P-IL converter are validated through simulation and experimental work.
Highlights
Renewable Energy Sources (RES) are increasingly replacing conventional and fossil fuels because of their depleting nature and contribution to global warming
With the PV power generating DC output and loads operating on DC power, DC microgrid has caught the attention of various governments, academicians and researchers [3], [4]
A new high gain converter called ‘‘Triple mode Active Passive Parallel Intermediate Links’’ (TM-A2P-IL) converter is proposed for DC microgrid applications
Summary
Renewable Energy Sources (RES) are increasingly replacing conventional and fossil fuels because of their depleting nature and contribution to global warming. The inductor cells are replaced by switched inductor cells to increase the voltage gain [38] This converter is operated with a single duty cycle, and the efficiency is severely affected because of repeated loops of energy transfer within the converter circuit. The proposed converter does not use any voltage multiplier circuit, switched capacitor units, switched inductor units, and transformers. The conventional boost converter consists of a switch (S), inductor (L), the diode (D) and capacitor (C). During this mode, all the switches in the circuit have their gate pulses OFF, and all the diodes are reverse biased. The following conditions must be satisfied in order to operate the A2P-IL converter in CCM
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