Decentralized Wind Power Plant Contribution to Primary Frequency Control

Over recent decades, renewables have been integrating into power systems without non-stop, mainly wind energy based on variable speed wind turbines. However, their integration possess stress on the power system due to intermittency and difficult controllability. One of such problems is highly related to grid frequency control, usually performed by adjusting the production of conventional generation units in response to changes in the demand. As a consequence, new frequency control techniques for variable speed wind turbines connected to the grid have been recently under study. Under this framework, this paper proposes a new controller providing a variable additional active power supplied by wind turbines depending on two main factors: the value of the grid frequency excursion and the time interval taken by such frequency deviations. In this way, wind turbines can make an important contribution to primary frequency response in future power systems with massive renewable integration.