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Integration of renewable energy in Europe : final report. European Commission. DG Energy ; London : Imperial College ; NERA Economic Consulting, 12 June 2014, 236 p.ec.europa.eu/energy/renewables/doc/201406_report_renewables_integration_europe.pdfExecutive summary :Integration of renewable generation represents a key pillar of the Commission's broader energy and climate objectives in reducing greenhouse gas emissions, improving the security of energy supply, diversifying energy supplies and improving Europe's industrial competitiveness. In recent years, the Commission and EU electricity industry, including ACER/ERGEG and national regulators, have analysed the feasibility of and potential challenges around power sector decarbonisation and an increasing penetration of the supply of electricity from renewable energy sources (RES-E). Most of this work has been focused on the development to 2020 and the implications of RES-E at transmission level. However, it is widely expected that much of the growth of renewables beyond 2020 may be based on decentralised generation (DG). This may result in additional challenges for distribution networks that are not yet fully understood. Moreover, it is often argued that an increased penetration of decentralised generation will require an active use of demand response (DR) as well as investments into new storage technologies at both transmission and distribution levels...