Renewable energies as: solar, wind, constitute excellent solutions to both the increase of energy consumption and environment problems. They are clean and constitute an alternative to meet the needs of today's society. These energies neglected in the past, find their proper place, obtained through research and studies that are increasingly diverse and multidisciplinary. Several sources of renewable energy are subject of advanced research; the aim is to developtechniques for extracting power with high reliability, lower cost and increased energy efficiency The goal of this session is to present last works on design, control and applications in renewable energy systems (wind and solar), to maximize the energy production in such systems and to increase their economic attractiveness.