Superstatistical methods for complex systems: Application to frequency  fluctuations in power g...
Channel: Instituto de Física Interdisciplinar y Sistemas Complejos (IFISC)
Date: 2018-05-23

- By: Christian Beck
- Affiliation: School of Mathematical Sciences, Queen Mary U. of London
- Date: 2018-05-23T15:00:00+00:00

  The superstatistics concept  is a useful method borrowed from nonequilibrium statistical mechanics to understand

spatio-temporal inhomogeneous complex systems with separation of time scales.

After a brief introduction to the basic theoretical ideas  I will discuss a couple of recent applications.

As a main example to be considered in somewhat more detail, I will discuss the statistics of frequency fluctuations around

the mean frequency of 50 Hz in power grids, which can be well understood using superstatistical  concepts. In fact, 

multiple types of fluctuations impact the collective dynamics of power grids and thus challenge their robust operation.
Fluctuations result from processes as different as dynamically changing demands, energy trading and an increasing share of
renewable power feed-in. Analysing frequency time series for a range of power grids, including grids in North America, Japan,
the UK and the rest of Europe, one finds a significant deviation from Gaussianity that is very well described by superstatistical models.