A Review of Advancements in DC Grid Technology

Abstract

The intensifying requirement for energy and high depletion rate of fossil fuels has led to the extensive use of renewable sources. DC grid system provides the best platform for utilization of the available renewable sources in both commercial and domestic applications. In comparison with AC grid, the number of interfacing converters required in case of DC grid is less. This paper presents us an analysis of upgradation in the field of DC grid till date. Various dominant factors that have to be acknowledged in architecture of a DC grid have been put forward. For example, grid voltage level, grid protection and battery integration. As we know in AC grid there is not any one fixed specific voltage level that can be followed to form a DC grid. Therefore, different proposed voltage levels have been analyzed by explaining their advantages and disadvantages. Most importantly, here, we have discussed about battery integration, since in DC grid, it assures system reliability. Discussions have also been made on the areas related to DC grid protection.