Wind Power Installed Capacity Forecast Based on a Two-Parameter Variable-Weight Buffer Operator and Subsidy Strategy Research

Table 3

The fitted and predicted values of each model in case study.

Year	Raw data	GM(1,1)		AWBO-GM(1,1)			2-VWBO-GM(1,1)
		Fitted/predicted values	Errors (%)	Buffered data	Fitted/predicted values	Errors (%)	Buffered data	Fitted/predicted values	Errors (%)
Training set
2010	3.01	9.14	92.87	29.37	—	—	18.35	—	—
2011	4.74	13.32	47.39	33.13	37.74	0.35	23.06	30.44	32.04
2012	9.04	19.42	21.07	37.87	43.55	0.19	32.81	35.67	8.71
2013	16.04	28.31	3.10	43.63	50.25	0.55	43.83	41.79	4.65
2014	29.22	41.26	4.65	50.53	57.99	0.63	57.34	48.96	14.61
2015	39.43	60.15	8.53	57.63	66.92	0.27	60.55	57.37	5.25
2016	55.42	87.68	12.33	66.74	77.23	1.07	66.46	67.21	1.13
2017	78.06	9.14	92.87	78.06	32.70	1.29	78.06	78.75	0.88
Test set
2018	94.31	127.81	35.52	—	89.12	5.50	—	92.27	2.17
2019	107.97	186.31	72.55	—	102.84	4.75	—	108.10	0.12
2020	133.97	271.58	102.72	—	118.67	11.42	—	126.66	5.46