Renewable energy sources appeared as a viable alternative for environmentally hazardous sources. However, sources of renewable energy have considerably unpredictable and environmental conditions dependent power output and as such can’t be directly incorporated into existing electrical grid. These sources are usually integrated to the electrical grid as part of microgrid or hybrid energy source that consists of two or more energy sources, converters and/or storage devices. In hybrid energy sources, generation and storage elements complement each other to provide high quality and more reliable power delivery. The main work in this project is oriented towards defining a generalization of control problem for power electronics interfaces in hybrid energy source, the development of control for grid connected hree phase switching converters and the development of a maximum power point tracking algorithm that can be easily incorporated into hybrid source control.