Comparative Analysis and Optimization Parallel Operation Strategies in DC-DC Converters for Smart DC Grid Integration

This paper presents a study of parallel operation of DC-DC converters in application for Smart DC Grids. The analysis starts with the utilization of non-isolated and isolated bidirectional Buck-Boost converters (operating as boost converter), which are essential parts of DC grids that are usually made for 400V operations. Through the simulation of these converters' transient procedures and energy transfer processes, information about their transient voltage drops and overvoltage is obtained. Moreover, power storage technologies are used in those configurations by implementing through these interface circuits to exchange the energy from DC Grid. Boost converter has been analyzed and its operation is verified through the simulations by systematizing and optimization of their performance for this converter is to prioritize effective energy transmission and ripple reduction. The aim of study is to include transient analysis as well as for steady state processes, particularly when it comes to regulate voltage agitation and reducing interruptions during the transfer of energy from a point of DC Grid to another one. A comparative analysis is transmitted here for these parallel DC-DC converters to isolated converters, focusing on how well they function in under voltage and overvoltage cases. Furthermore, this paper covers the modeling of DC grids as parallel networks of AC grids to a consumer, emphasizing the incorporation of converters for bidirectional energy transfer and the application of DC generators. Simulations of the results are done with the PLECS software.