Design and Control of Photovoltaic and Wind Source Based Low-Voltage DC Micro-Grids

Abstract

Renewable energy driven energy systems for the deployment of large scale and small-scale energy are gaining popularity among the researches and end-users to opt the many advantages. Further, small-scale energy systems, like micro grids have more advantages than the large-scale systems. To meet the demand of the DC loads, an establishment of dc-micro grids are needed for the community loads with less power converters. The establishment of DC-micro grids by using the renewable energy sources is one of the emerging research topics as the solar energy is one of the promising technologies for the generation of DC power. This paper presents a solar photovoltaic (PV) and wind energy source-based DC micro-grid. The proposed system mainly consists of DC-to-DC converts, battery energy storage system, bidirectional converters and maximum power point tracking unit to establish the PV and wind-based DC micro grid. In this work, an adaptive technique is designed and simulated to study the load responses under a various fault condition without compromising the capability of maximum power from the sources even though under the hard conditions as well. The simulation result shows the effectiveness and usefulness of the proposed study for the design and control of low-voltage DC- micro grid system for the community loads, like commercial buildings.