Year-ahead scenarios
Article 65
1. All TSOs shall jointly develop a common list of year-ahead scenarios against which they assess the operation of the interconnected transmission system for the following year. Those scenarios shall allow the identification and the assessment of the influence of the interconnected transmission system on operational security. The scenarios shall include the following variables: (a) electricity demand; (b) the conditions related to the contribution of renewable energy sources; (c) determined import/export positions, including agreed reference values allowing the merging task; (d) the generation pattern, with a fully available production park; (e) the year-ahead grid development. 2. When developing the common list of scenarios, TSOs shall take into account the following elements: (a) the typical cross-border exchange patterns for different levels of consumption and of renewable energy sources and conventional generation; (b) the probability of occurrence of the scenarios; (c) the potential deviations from operational security limits for each scenario; (d) the amount of power generated and consumed by the power generating facilities and demand facilities connected to distribution systems. 3. Where TSOs do not succeed in establishing the common list of scenarios referred to in paragraph 1, they shall use the following default scenarios: (a) Winter Peak, 3rd Wednesday of January current year, 10:30 CET; (b) Winter Valley, 2nd Sunday of January current year, 03:30 CET; (c) Spring Peak, 3rd Wednesday of April current year, 10:30 CET; (d) Spring Valley, 2nd Sunday of April current year, 03:30 CET; (e) Summer Peak, 3rd Wednesday of July previous year, 10:30 CET; (f) Summer Valley, 2nd Sunday of July previous year, 03:30 CET; (g) Autumn Peak, 3rd Wednesday of October previous year, 10:30 CET; (h) Autumn Valley, 2nd Sunday of October previous year, 03:30 CET. 4. ENTSO for Electricity shall publish every year, by 15 July, the common list of scenarios established for the following year, including the description of those scenarios and the period during which these scenarios are to be used.