Simulation and Realization of DC Nano Grid

ABSTRACT More than a billion people worldwide still do not have access to basic modern energy services such as electric lighting in their homes. Most of these people live in remote rural areas, which makes extension of national electric grids to meet their needs prohibitively expensive. Several solutions involving solar photovoltaic electricity generation, such as solar lanterns, solar home systems (SHS), and solar (AC) mini-grids are being actively pursued to address the energy requirements of these people. These current solutions each have certain limitations, such as high cost for the cases of mini grids and solar home systems, or limited functionality and expandability in the case of solar lanterns. This work describes an approach to rural electrification – solar DC Nano-grids – which attempts to address these limitations by providing basic energy services at lowest possible cost, while using a system architecture which is expandable and future-proof. In this work, model of a solar panel and obtaining a constant output voltage using MPPT (Maximum Power Point Tracking) is realized. MPPT will be useful to extract the maximum power from the solar panels and also to maintain a constant output voltage. Also in this paper we will use a battery storage that will be useful in supplying continuous power to the DC loads.