A microgrid concept for the thermal and electrical energy supply of a Sport-Recreation Center Ajdinovići (S.R.C.A.) has been proposed in this paper. A self-contained and intelligent power distribution grid has been developed for this case, taking into account the location, locally available renewable energy sources and the very purpose of this center. Comparative analyses between independent power supply through the proposed hybrid power system and the supply over the transmission and distribution network were performed. Technical and economical optimization of an energy system with distributed power generation was done by applying HOMER and DIgSILENT PowerFactory professional software tools. As a result, hybrid power system is more cost-effective than the conventional supply by the power distribution network, microgrid meets the technical criteria based on the analysis of power flows and the stability of the network has been achieved. Establishment of energy independence for the existing S.R.C.A. besides economic factor will show several benefits regarding better use of locally available resources, reduction of CO2 emissions and energy efficiency increment as well as an employment opportunity to the local people, thus contributing to the sustainability of the region.

Many recent studies have dealt with the future of the power distribution system, and there are different technologies which will facilitate the development towards the smart power distribution grid vision. Plug-in electric vehicles (PEV) and distributed generation (DG) technologies will become integral part of this vision. PEVs are specific because they can act both as a load and as a source of energy in a concept known as Vehicle-toGrid (V2G). This paper analyses the impact of these technologies on an example of a real medium-voltage distribution network operating in Bosnia and Herzegovina. The impact of each technology and in combination with another technology is analyzed. It is shown that the impact of PEVs may be negative in terms of the increase in the peak load and power losses as well as transformer overloading for scenarios of a high-penetration level and uncontrolled charging. However, controlled charging and regulated implementation of V2G can be beneficial in certain terms. The Photovoltaic (PV) technology can reduce the power losses, but will violate voltage-limitations in periods of high solar insolation, especially for a high-penetration level. By controlling the new emerging technologies, many of the negative impacts can be reduced and even turned into positive effects.