@inproceedings{RuedaEscobedoMorenoSchiffer, author = {Rueda-Escobedo, Juan G. and Moreno, Jaime A. and Schiffer, Johannes}, title = {Finite-time estimation of time-varying frequency signals in low-inertia power systems}, doi = {10.26127/BTUOpen-5988}, pages = {2108 -- 2114}, abstract = {The ongoing and unprecedented transformation of power systems leads to a reduction in the number of conventional power plants, which are the classical actuators of the grid. In addition, this development results in a decreasing system inertia, which is expected to yield faster frequency dynamics. Therefore power-electronics-interfaced units have to take over system control tasks and, in particular, frequency control. For this purpose, accurate and fast estimation algorithms for time-varying frequency signals are needed. Motivated by this fact, we propose a time-varying parameter estimator and a tuning criterion, which for sufficiently small initial estimation errors allows to reconstruct the time-varying frequency signal of a symmetric three-phase waveform in finite time. The proposed estimator is derived by using a time-varying version of the super twisting algorithm and its performance is illustrated via numerical examples.}, subject = {Distributed power generation; Frequency control; Parameter estimation; Power plants; Power system control; Frequenzsignale; Massentr{\"a}gheit; Systemsteuerung; Transformation; Frequenzdynamik; Energieversorgung; Frequenzstabilit{\"a}t}, language = {en} }