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European electricity markets saw increased price correlations and community convergence in Continental Europe during the 2019-2023 energy crisis, while Nordic and Iberian regions fragmented.

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Area of Science:

  • Energy economics
  • Power systems analysis
  • Econometrics

Background:

  • Electricity markets coordinate power generation and demand across European bidding zones, each with unique prices.
  • Spatiotemporal analysis of European electricity prices remains underexplored despite extensive individual price time series studies.
  • The 2019-2023 period, marked by Europe's energy crisis, presents a unique context for studying price dynamics.

Purpose of the Study:

  • To conduct a data-centric analysis of European day-ahead electricity price patterns and correlations from 2019-2023.
  • To identify dominant communities of bidding zones and assess the dimensionality of spatial price differences.
  • To investigate the impact of the energy crisis on the spatiotemporal correlations and community structures of European electricity markets.

Main Methods:

  • Utilized a comprehensive dataset of European day-ahead electricity prices spanning 2019-2023.
  • Applied community detection algorithms to identify groupings of bidding zones with similar price behaviors.
  • Employed principal component analysis (PCA) to reduce the dimensionality of spatial price variations.

Main Results:

  • Identified distinct communities of bidding zones across the European power system.
  • Demonstrated that spatial price differences can be effectively described by a small number of principal components.
  • Observed increased price correlations and community convergence in Continental Europe during the energy crisis.
  • Documented decreased correlations and community fragmentation in the Nordic and Iberian regions.

Conclusions:

  • The European energy crisis significantly altered spatiotemporal price dynamics within electricity markets.
  • Continental European bidding zones exhibited greater integration, while Nordic and Iberian markets showed signs of fragmentation.
  • The study highlights the utility of data-centric, spatiotemporal analyses for understanding electricity market behavior under crisis conditions.