The Renewable Electrical Energy Systems Workshop is a three days event where leading edge topics related to the high scale integration of renewable energy sources (RES) are discussed. The trends in the design of the future renewable energy power plants, the implementation of advanced control systems at different hierarchical levels, the latest advances in the field of power electronics applied to RES as well as the integration of energy storage systems are the main areas where this workshop will be focused, counting in all of them with the participation of experts in all the sessions that will be held between the 14th and the 16th of December.