Poprawa jakości prognoz probabilistycznych cen energii elektrycznej na rynku dnia następnego przy użyciu metody głównych składowych [Enhancing probabilistic forecasts of day-ahead electricity prices with principal component analysis (PCA)] Tomasz Serafin (Doctoral School - Management, PWr, Wrocław) Recent changes in electricity markets amplified the importance of accurate probabilistic forecasts. In this study, we apply principal component analysis (PCA) in the process of obtaining probabilistic forecasts of day-ahead electricity prices. We additionally focus on the impact of different data normalization schemes on the accuracy of forecasts. The performance is evaluated across two datasets from major power markets – Scandinavian Nord Pool and American PJM. The proposed approach is able to outperform well-performing literature benchmarks in terms of the empirical coverage of prediction intervals.