Universität zu Köln

Gorjao, Leonardo Rydin, Vanfretti, Luigi ORCID: 0000-0002-4125-1055, Witthaut, Dirk ORCID: 0000-0002-3623-5341, Beck, Christian ORCID: 0000-0002-4818-6997 and Schaefer, Benjamin (2022). Phase and Amplitude Synchronization in Power-Grid Frequency Fluctuations in the Nordic Grid. IEEE Access, 10. S. 18065 - 18074. PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. ISSN 2169-3536

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Abstract

Monitoring and modelling the power grid frequency is key to ensuring stability in the electrical power system. Many tools exist to investigate the detailed deterministic dynamics and especially the bulk behaviour of the frequency. However, far less attention has been paid to its stochastic properties, and there is a need for a cohesive framework that couples both short-time scale fluctuations and bulk behaviour. Moreover, commonly assumed uncorrelated stochastic noise is predominantly employed in modelling in energy systems. In this publication, we examine the stochastic properties of the Nordic Grid, focusing on the increments of the frequency recordings. We show that these increments follow non-Gaussian statistics and display spatial and temporal correlations. Furthermore, we report two different physical synchronisation phenomena: a very short timescale phase synchronisation (< 2 s) followed by a slightly larger timescale amplitude synchronisation (2 s-5 s). Overall, these results show that modelling of fluctuations in power systems should not be restricted to Gaussian white noise.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gorjao, Leonardo Rydin UNSPECIFIED UNSPECIFIED UNSPECIFIED Vanfretti, Luigi UNSPECIFIED orcid.org/0000-0002-4125-1055 UNSPECIFIED Witthaut, Dirk UNSPECIFIED orcid.org/0000-0002-3623-5341 UNSPECIFIED Beck, Christian UNSPECIFIED orcid.org/0000-0002-4818-6997 UNSPECIFIED Schaefer, Benjamin UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-688655
DOI:	10.1109/ACCESS.2022.3150338
Journal or Publication Title:	IEEE Access
Volume:	10
Page Range:	S. 18065 - 18074
Date:	2022
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Place of Publication:	PISCATAWAY
ISSN:	2169-3536
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSIENT STABILITY; NETWORKS; IDENTIFICATION; OSCILLATIONS Multiple languages Computer Science, Information Systems; Engineering, Electrical & Electronic; Telecommunications Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68865