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Application of Temporal Fusion Transformer for Day-Ahead PV Power Forecasting

Miguel López Santos (Instituto Tecnológico de Galicia), Xela García‐Santiago (Instituto Tecnológico de Galicia), Fernando Echevarría Camarero (Instituto Tecnológico de Galicia), Gonzalo Blázquez Gil (Instituto Tecnológico de Galicia), Pablo Carrasco Ortega (Instituto Tecnológico de Galicia)

Energies
DOI: 10.3390/en15145232 (Computer Science)
License: CC BY

Abstract: The energy generated by a solar photovoltaic (PV) system depends on uncontrollable factors, including weather conditions and solar irradiation, which leads to uncertainty in the power output. Forecast PV power generation is vital to improve grid stability and balance the energy supply and demand. This study aims to predict hourly day-ahead PV power generation by applying Temporal Fusion Transformer (TFT), a new attention-based architecture that incorporates an interpretable explanation of temporal dynamics and high-performance forecasting over multiple horizons. The proposed forecasting model has been trained and tested using data from six different facilities located in Germany and Australia. The results have been compared with other algorithms like Auto Regressive Integrated Moving Average (ARIMA), Long Short-Term Memory (LSTM), Multi-Layer Perceptron (MLP), and Extreme Gradient Boosting (XGBoost), using statistical error indicators. The use of TFT has been shown to be more accurate than the rest of the algorithms to forecast PV generation in the aforementioned facilities.

Published on 19 Jul. 2022