Details

Autor(en) / Beteiligte

• Zang, Haixiang
• Cheng, Lilin
• Ding, Tao
• Cheung, Kwok W
• Liang, Zhi
• Wei, Zhinong
• Sun, Guoqiang

Titel

Hybrid method for short-term photovoltaic power forecasting based on deep convolutional neural network

Ist Teil von

• IET generation, transmission & distribution, 2018-11, Vol.12 (20), p.4557-4567

Ort / Verlag

The Institution of Engineering and Technology

Erscheinungsjahr

2018

Quelle

EZB*

Beschreibungen/Notizen

• Photovoltaic (PV) electric power has been widely employed to satisfy rising energy demands because inexhaustible renewable energy is environmentally friendly. In order to mitigate the impact caused by the uncertainty of solar radiation in grid-connected PV systems, a hybrid method based on a deep convolutional neural network (CNN) is introduced for short-term PV power forecasting. In the proposed method, different frequency components are first decomposed from the historical time series of PV power through variational mode decomposition (VMD). Then, they are constructed into a two-dimensional data form with correlations in both daily and hourly timescales that can be extracted by convolution kernels. Moreover, the time series of residue from VMD is refined into advanced features by a CNN, which could reduce the data size and be easier for further model training along with meteorological elements. The hybrid model has been verified by forecasting the output power of PV arrays with diverse capacities in various hourly timescales, which demonstrates its superiority over commonly used methods.