Planning of Cascade Hydropower Stations with the Consideration of Long-Term Operations under Uncertainties

Table 8

Estimation gaps of the DE model.

Discount factor δ	Planning stages
	T = 4	T = 8	T = 12
0.99	25.53%	22.51%	19.94%
0.95	17.89%	6.71%	−2.99%
0.90	8.72%	−9.76%	−24.32%
0.85	−0.51%	−23.20%	−39.73%
0.80	−9.16%	−34.34%	−50.97%
0.75	−17.29%	−43.92%	−59.59%
0.70	−24.72%	−51.99%	−66.37%
0.65	−31.44%	−58.62%	−71.61%
0.60	−37.53%	−64.02%	−75.64%