Load frequency controllers considering renewable energy integration in power system

Load frequency control or automatic generation control is one of the main operations that take place daily when considering a modern power system or not. The objectives of load frequency control are to maintain power balance between interconnected areas and to control the power flow in the tie-lines. Electric power cannot be stocked in large quantity that why its production must be equal to the consumption in each time. This equation constituted the key for a good management of any power system and introduces the need of more controllers when taking into account the integration of renewable energy sources into the traditional power system. More controllers are presented in the literature and the presents work proposes a review of those called traditional and those who combined the traditional controller and artificial intelligence algorithms.