Larger interconnected areas will allow larger balancing areas with smoother variable renewable output. In general, increased levels of interconnections and cross-region co-operation in the form of market coupling and congestion management will facilitate the accommodation of variable renewable energies. As part of its Trans European Energy Networks (TEEN) initiative, the European Commission is thus driving the evolution of the current transmission grid towards a “super grid" to ensure reliable electricity supply, in particular to provide balancing services across Europe.