Renewable energies in the decentralized energy supply

An energy supply system is proposed based on a combination of renewable energy plants using solar, wind and biomass, supplemented by a traditional diesel generator and supervised by a management unit. This decentralized energy supply system, with high local production contents, is well adapted for regions where it is costly and/or practically difficult to supply by the conventional centralized way by means of a nation-wide grid. In a developing country, the decentralized supply can be a rural village size system that can assure high availability and supply security for the local population. The aim is to decrease as much as possible the operating time of the diesel aggregate in order- to reduce the diesel fuel costs and wear and tear due to a high number of (continuous) operating hours. A typical village electrical power requirements as well as its renewable energies potential are described. The improved design of the advanced supply system with circuit schematics and power dimensioning are presented in this paper.