The increase in the volume of energy programmed in real time during recent years, mainly driven by a strong penetration of non-manageable renewable energies in this service (control zones) explains the increased number of claims reported during 2008, 2009, and during the first quarter of 2010 (in this quarter, with an exceptional production of renewables, 51 claims were registered in association to this type of incident).The introduction of a real time automated mechanism for secondary regulation released on 5 October 2010 has reduced the number of claims associated to this type of incident and only three claims were registered after that date until the end of 2010.