The invention relates to a method for transmitting data sets of a plurality of wind turbines (100) and of a plurality of wind farms (112) to a control center (14). For this purpose, the method comprises the following steps: sending a notification of an updated data set from one of the wind turbines or one of the wind farms to the control center (14). Furthermore, it is then decided in the control center (14) whether the updated data set should be requested. Only in the case that the updated data set should be requested, a request for the updated data set is sent from the control center (14) to the wind turbine (100) or to the wind farm (112). In the wind farm or in the wind turbine, said request is received and a response having the updated data set is sent to the control center (14). The invention further relates to a wind turbine, to a control center, and to a system consisting thereof for performing the method according to the invention.