The hydroelectricity consumption of China is increasing, and hydropower exerts a crucial influence on sustained economic growth. A new method for estimating the hydroelectricity consumption of China is developed through the grey modeling technique. Taking into account the inherent error occurring in the leap from differential to difference in most existing grey serial models, this study constructs an unbiased NGBM(1,1) model based on the nonlinear grey Bernoulli model (NGBM(1,1)), which outperforms other grey benchmark models by adjusting the nonlinear parameter. The structural parameters of t...