This report is part of the EcoGrid.dk project phase 1 initiated by Energinet.dk and the result of work package 5 dealing with proposals for future steps toward a Danish power system with 50% wind power. The EcoGrid.dk project has the objective to develop new long term technologies and market solutions for power grid and systems, with reference to the Danish power system. The project is divided into phases, from phase 0 to phase 3. The focus of the phases is: - Phase 0: Preparation of project description etc. - Phase 1: General description and analyses of demand and development of the Danish power system with increased volumes of RE. - Phase 2: Specific projects, analyses and recommendations to Energinet.dk with main focus on research activities - Phase 3: Technologies are implemented in real environment and demonstrated with subsequent adoption and implementation in Energinet.dk. The objective of EcoGrid work package 5 is to suggest future research and development activities in EcoGrid.dk. The future activities will consist of related activities of which some should be directed within an EU framework (EcoGridEU). The delivery of phase 1 work package 5 is a packet of proposals to be used as input to Energinet.dk when formulating EcoGrid.dk phase 2.