Equivalent Modeling of DFIG-Based Wind Power Plant Considering Crowbar Protection

Table 5

Equivalent accuracy of crowbar conduction and model error indices.

Operating conditions	Clustering index	Equivalent accuracy/%	Dynamic absolute error			Dynamic relative error
			/pu	/MW	/Mvar	/%	/%	/%
Figure 6(a)	Crowbar conduction	100.0	0.0004	0.08	0.12	0.07	0.65	1.44
	Incoming wind	77.3	0.0016	0.53	0.61	0.39	5.36	3.98
	Speed vector of generator	57.6	0.0061	0.67	2.32	1.42	6.32	25.87
Figure 6(b)	Crowbar conduction	100.0	0.0007	0.10	0.23	0.15	0.77	16.03
	Incoming wind	54.5	0.0046	0.73	1.78	1.13	6.39	27.44
	Speed vector of generator	47.0	0.0072	0.56	2.62	1.66	4.74	236.25
Figure 6(c)	Crowbar conduction	98.5	0.0012	0.35	0.50	0.22	2.46	3.78
	Incoming wind	72.7	0.0035	0.35	1.25	0.79	2.22	13.74
	Speed vector of generator	72.7	0.0045	0.57	1.78	0.95	3.59	16.72
Figure 7(a)	Crowbar conduction	98.5	0.0005	0.10	0.21	0.13	6.74	1.88
	Incoming wind	54.5	0.0044	0.81	1.55	1.21	74.75	21.31
	Speed vector of generator	53.0	0.0042	0.85	1.46	1.16	73.81	19.85
Figure 7(b)	Crowbar conduction	95.5	0.0006	0.22	0.22	0.14	7.23	3.97
	Incoming wind	50.0	0.0066	1.19	2.35	1.80	45.76	53.90
	Speed vector of generator	51.5	0.0064	1.22	2.26	1.74	45.51	50.70
Figure 7(c)	Crowbar conduction	100.0	0.0004	0.13	0.19	0.07	2.17	0.86
	Incoming wind	80.3	0.0006	0.18	0.20	0.08	3.50	0.97
	Speed vector of generator	78.8	0.0005	0.24	0.26	0.10	3.20	1.13