Spatio-temporal correlations in power-grid frequency recordings
by Leonardo Rydin
at 15.00 - 15.30
In this talk I will present a recent work focused on spatio-temporal correlations in power-grid frequency recordings (see Rydin Gorjão et al. [1]). In it, we have analysed an open database of measurements of electric power-grid frequencies across 17 locations in 12 synchronous areas on three continents (see Jumar et al. [2]). We show that the scaling law of fluctuations in power grids proposed in Schäfer et al. [3] is verified, with a small caveat particular to each power-grid control system and constraints. We study the dephasing of incremental correlations of power-grid frequency recordings, the puzzling decay of leptokurtic distribution of increments of power-grid frequency, and have a first look at long-distance synchronisation across the Continental European grid. In this talk I will bring forth the proposal to examine power-grid frequency recordings in the ambit of stochastic process, to make use of the more common stochastic analysis and estimators available, the parallel to other dynamical systems, and open question in this ambit.
Further Notes:
- [1] Leonardo Rydin Gorjão, Richard Jumar, Heiko Maass, Veit Hagenmeyer, G. Cigdem Yalcin, Johannes Kruse, Marc Timme, Christian Beck, Dirk Witthaut, Benjamin Schäfer, Open data base analysis of scaling and spatio-temporal properties of power grid frequencies, accepted in Nature Communication, doi:10.21203/rs.3.rs-37766/v1
- [2] Richard Jumar, Heiko Maaß, Benjamin Schäfer, Leonardo Rydin Gorjão, Veit Hagenmeyer, Power grid frequency data base, preprint on ArXiv, arXiv:2006.01771
- [3] Benjamin Schäfer, Christian Beck, Kazuyuki Aihara, Dirk Witthaut, Marc Timme, Non-Gaussian power grid frequency fluctuations characterized by Lévy-stable laws and superstatistics, Nature Energy volume 3, 119–126 (2018), doi:10.1038/s41560-017-0058-z