Reduction of Main-Grid Dependence in Future DC Micro-Grids Using Electric Springs

The work presented in this article tries to reduce the main grid dependability of the micro-grids using DC Electric springs and developing DC micro-grid systems which are less dependent on main-grids during generation un-certainties. To make the micro-grid structures less dependent on main-grids techniques like introducing storage, demand-side management, etc. have been used in the literature. This question of meeting the demand-supply and reduced main-grid dependability is more predominant in the micro-grids if most of the power supplied by renewable energy sources. The DC Electric springs in order to reduce the power drawn from the main-grid during generation deficits make the non-critical loads consumed less power during generation intermittence. A DC micro-grid system consisting of a renewable generator that is capable to supply local loads considered for the study. The micro-grid system considered here depends on main-grid during insufficiency in the power generated by the renewable generator and the specific aim of this work is to reduce the power drawn from the main grid. The system models designed in the MATLAB and the energy consumption from the main grid in the presence and absence of DC Electric springs are studied.