These are frequency deviatons caused only because electricity is traded in blocks of 15, 30 or 60 minutes. At every full hour, large deviations occur due to switching.
This increases costs of first-level reserves, paid by the taxpayers.
This problem is due to market deregulation, pure demand-following did not have this problem.

02 Mar 2012 - 2:35
# lastedited 17 Mar 2013
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