研究目的
To perform a comprehensive comparative analysis of ten recent neural networks and intelligent algorithms in short-term PV forecasting and propose a new hybrid prediction strategy.
研究成果
The proposed Hybrid method performs most favorably among all methods, correcting erroneous fluctuations and negative forecasting. A simple combination of several good models can generate a more reliable prediction than any single method on its own, especially when there is no complete data for model training.
研究不足
The training process of neural networks exhibits great randomness, and intelligent algorithms are generally more robust. The forecasting performance is significantly affected by the season, with winter being the most challenging due to insufficient irradiation data.
1:Experimental Design and Method Selection:
The study evaluates ten machine learning algorithms for PV power forecasting, including six ANN and four IA methods, and proposes a hybrid strategy.
2:Sample Selection and Data Sources:
Uses a one-year dataset of a 406 MWp PV plant in the UK, divided into four seasons for training and validation.
3:List of Experimental Equipment and Materials:
MATLAB R2018a for simulations.
4:Experimental Procedures and Operational Workflow:
All methods are implemented in MATLAB, with parameters fine-tuned for each season. The hybrid method combines the best three methodologies based on skill score.
5:Data Analysis Methods:
Performance is evaluated using normalized root mean square error (nRMSE) and skill score.
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