A Novel Approach for Day-Ahead Hourly Building-Integrated Photovoltaic Power Prediction by Using Feature Engineering and Simple Weather Forecasting Service

• Published in: Energies (Basel) Vol. 16; no. 22; p. 7477
• Main Authors: Jeong, Jinhwa, Lee, Dongkyu, Chae, Young Tae
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.11.2023
• Subjects: Accuracy; Algorithms; Alternative energy sources; artificial neural network (ANN); building-integrated photovoltaic (BIIPV); Emission standards; Energy management systems; Energy resources; feature engineering; Machine learning; Neural networks; Radiation; Regression analysis; Renewable resources; sensitivity analysis; short-term prediction; Solar energy industry; Weather forecasting; weather forecasting service; South Korea
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en16227477

Although the accuracy of short-term prediction of building-integrated photovoltaics is essential to making an optimal decision on the management of the generated electricity, the weather forecasting service in many countries provides insufficient features for improving the prediction accuracy of the photovoltaics power output. This study suggests a machine learning model incorporated with feature engineering to improve the prediction performance of day-ahead hourly power outputs using a simple weather forecast service. A new synthetic feature, the modified sky condition, is derived to infer onsite sky condition and solar irradiation, which is not supported by the typical weather forecasting services. It evaluated the prediction performance with different training and hyper-parameter conditions for 60 days. By using the derived modified sky condition, the model outperformed other predictor configurations in most daily sky conditions; particularly, the accuracy improved by more than 50% on overcast days compared to when it used the original weather forecasting service data. The result demonstrates the feasibility and ability of the model to enable more efficient energy management of building-integrated photovoltaic power output in buildings without an onsite weather station, thus contributing toward the optimized dispatch of the integrated electricity energy storage system and other distributed energy resources.