Smart grid engineering is the key for an optimized use of extensive energy resources which allows the hybrid renewable energy sources microgrid to be integrated and therefore dispatch their power generation to the grid over long distance DC transmission lines using the HDVC transmission technologies. However, the required number of generating units of wind-turbine generators and photovoltaic arrays, and the associated storage capacity for standalone and/or grid connected hybrid microgrid is determined using a sizing algorithm based on the observation that the state of charge of battery should ...