Bayesian Hierarchical Probabilistic Forecasting of Intraday Electricity Prices

• URL: http://arxiv.org/abs/2403.05441v2
• Date: Tue, 30 Jul 2024 14:46:12 GMT
• Title: Bayesian Hierarchical Probabilistic Forecasting of Intraday Electricity Prices
• Authors: Daniel Nickelsen, Gernot Müller,
• Abstract summary: We present a first study of Bayesian forecasting of electricity prices traded on the German continuous intraday market. For validation we use the exceedingly volatile electricity prices of 2022, which have hardly been the subject of forecasting studies before. We challenge the declared gold standard of using LASSO for feature selection in electricity price forecasting by presenting strong statistical evidence that OMP leads to better forecasting performance.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We present a first study of Bayesian forecasting of electricity prices traded on the German continuous intraday market which fully incorporates parameter uncertainty. A particularly large set of endogenous and exogenous covariables is used, handled through feature selection with Orthogonal Matching Pursuit (OMP) and regularising priors. Our target variable is the IDFull price index, forecasts are given in terms of posterior predictive distributions. For validation we use the exceedingly volatile electricity prices of 2022, which have hardly been the subject of forecasting studies before. As a benchmark model, we use all available intraday transactions at the time of forecast creation to compute a current value for the IDFull. According to the weak-form efficiency hypothesis, it would not be possible to significantly improve this benchmark built from last price information. We do, however, observe statistically significant improvement in terms of both point measures and probability scores. Finally, we challenge the declared gold standard of using LASSO for feature selection in electricity price forecasting by presenting strong statistical evidence that OMP leads to better forecasting performance.

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