The control concept of multisource off-grid system

The off-grid system is a network without connection to the external grid capable of autonomous mode operation. These off-grid systems use mostly renewable sources complemented by the emergency source for case of bad weather conditions. The most common alternative sources include for example photovoltaic systems, wind power plants, cogeneration units, hydrogen technology and power generators. This combination of individual sources can be labelled as a multisource system with a combination of storage devices and a smart control system. The main goal of this paper is to present the developed off-grid system, whereas the analysis of its operation for variety of modes is introduced namely.