A Novel Hybrid Model for Short-Term Forecasting in PV Power Generation

Table 2

Comparative analysis on correlation coefficients between PV generation and external variables.

Data sources	External variables			Independent variable
	Solar irradiance	Module temperature	Atmospheric temperature	𝑃(𝑡−1)	𝑃(𝑡−2)	𝑃(𝑡−3)
PTM Green Energy Office (GEO) Building; Pusat Tenaga Malaysia	0.817	0.75	0.13	0.714	0.399	0.044
Taichung Thermal Power Plant	0.978	0.68	0.05	0.786	0.538	0.213
An academic building at the National Penghu University (NPU)	0.840	0.85	0.18	0.864	0.598	0.279

Note: 𝑃(𝑡−1) means one-hour-ahead PV power output.