Route map for renewable energy sources implementation for household in Bulgaria

Abstract

Abstract This paper is concerned with the design of a hybrid household system, located in the city of Sofia with the possibility of grid connection. It is comprised of photovoltaic (PV) arrays, wind generator and battery energy storage devices. A multi-objective, non-derivative optimisation is considered in this residential application; the primary objective is the system cost minimisation. The commercial software, HOMER Pro, is utilised to identify the least-cost design among hundreds of options. This paper discusses suitability of renewable energy (RE) applied in one-family household according socio-economic situation in Bulgaria. Finally, a route map of RES implementation options is presented, and economic indicators such as Total net presents cost (NPC), Cost of Energy (COE) and RES fraction are assessed.