Daily operating margins at the consumption peaks

Margin available after drawing up the operating schedule	Margin required for System Safety
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Definition:

The Margins represent a volume of capacity available for RTE over and above the operating schedule capable of being used to cope with generation or consumption contingencies. They are consequently one of the essential components of system control under safe operating conditions.

For further information, consult the annexe 1 of the Power system safety Memento.

The shape of the consumption curve evolves during the year ; in summer there is no consumption peak in the evening : the related margin is therefore no longer calculated.