1. Method of detecting electromechanical oscillations in power systems, wherein a) a system quantity of the power system is repeatedly measured and a series of measured values of the system quantity is generated, b) parameters of a parametric model are estimated from said series, c) information about an electromechanical oscillation mode of the power system are deduced from the parameters, wherein d) said parameters are updated every time a new value of the system quantity is measured.