# Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation (Text with EEA relevance), Article 72: Operational security analysis in operational planning

Extent: E+W+S+N.I.

1. Each TSO shall perform ... operational security analyses for at least the following time-frames:
(a) year-ahead;
(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(c) day-ahead; and
(d) intraday.
2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. To perform operational security analyses, each TSO shall, in the N-Situation, simulate each contingency from its contingency list established in accordance with Article 33 and verify that, in the (N-1)-situation, the operational security limits defined in accordance with Article 25 are not exceeded in its control area.
4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Source: https://www.legislation.gov.uk/eur/2017/1485/article/72 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1485/article-72
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.