Design and Analysis of an Interleaved Bi-Directional AC-DC Converter with Reduced Switch Count for Efficient Energy Harvesting

This study proposes a novel interleaved AC-DC converter as a potential solution to address the requirements of high-capacity energy storage systems. The number of semiconductor components in the converter was intentionally reduced during its design process. There is a growing demand for energy storage systems with higher power capacities, primarily driven by the rising adoption of alternative power plants and battery-powered vehicles. In order for the energy system to advance in the future, it is imperative to establish a robust interface which is an essential link between the power plant or utility grid and the battery. The efficacy of these systems is significantly contingent upon the functionality of this interface. It is frequently advised to employ a bi-directional system, as opposed to two separate unidirectional systems, in order to mitigate the expenses and dimensions of energy storage applications. The implementation of an interleaved design offers the potential to decrease the level of AC side current ripple, while simultaneously enhancing the overall current rating. The proposed arrangement also results in a reduction in the frequency of switching. Theoretically, the established switching pattern has the capacity to handle an infinite number of interleaved legs. The proposed extension has the potential to reduce overall system losses. The suggested architecture was subjected to simulations and analysis using MATLAB/Simulink. The working model of the system with a power output of 3.5 kilowatts (kW) has been constructed and subjected to testing within a laboratory setting. The findings obtained from the study provide evidence to support the assertion that the projected topology is effective. The operation of power factor correction exhibits a consistent continuity without any noticeable interruptions, while the output current ripple is significantly diminished.