A New Ultra-Gain Step-Up Converter with Continuous Input Current for Micro-Grid Applications

Abstract

For green energy micro-grid applications, it is crucial to have a step-up converter that can produce a wide range of voltages. This converter is necessary to match the low voltage output of the micro-grid with the DC-bus voltage and must have continuous input current. A new ultra-gain step-up converter with continuous input current, is proposed to achieve this objective. The proposed converter is a non-coupled inductor-based, non-isolated boost converter with continuous input current which is suitable to operate at a high voltage suitable for green energy based micro-grid applications. The proposed DC-DC configuration yields in increased efficiency, ultra-voltage gain with less duty ratios, minimal voltage stresses on the switches, and a high boost capacity. This converter has been designed and provided the detailed theoretical analysis and comprehensive method to obtain high gain. The simulation results show that the efficiency is 97.9% with ripple factor of 0.5. Additionally, this converter is tested under different duty ratios and the results are presented. The proposed system is unique because of its design and increased efficiency, which enable larger output voltages and a more significant gain for sustainable energy systems. Finally, the comparative study is also presented to show the competitiveness with other recent topologies.