CONFERENCEWe will present the effects of a high penetration of variable and distributed RES on the demand for cross-border electricity transmission in Europe. We will highlight the impacts of different electricity generation and transmission portfolios.More importantly, we will refer to wind and solar energy curtailment variations on load duration under high penetration conditions of variable RES. The highly variable nature of RES affected by both seasonal and hourly weather variability, with the support of new systems and tools can be effectively integrated into the power system. The Internet and ICT enable innovations for the smarter use of energy known as Smart Grids, handling data through remote sensing, control, and monitoring processes.