Long-Term Optimal Operation of the Cascade Hydro-Wind-Photovoltaic Hybrid System considering Transmission Section Constraints

Table 2

Correlation coefficient and Euclidean distance for copula function.

Copula
Empirical	−0.4179	−0.5719	0
Normal	−0.4043	−0.6552	0.0779
t	−0.4882	−0.6767	0.0820
Gumbel	1.3575 × 10^−6	2.0510 × 10^−6	0.2751
Clayton	7.2543 × 10^−7	1.0922 × 10^−6	0.2751
Frank	−0.4278	−0.6079	0.0654