Detection and Quantization of Bearing Fault in Direct Drive Wind Turbine via Comparative Analysis

Table 1

9 operation conditions and the fault feature frequencies.

	(Hz)	(kW)	RPFI (Hz)	RPFO (Hz)	RSF (Hz)	FTF (Hz)
C1	0.133	0	3.432	3.101	1.315	0.070
C2	0.15	40	3.861	3.489	1.479	0.079
C3	0.17	60	4.376	3.954	1.676	0.089
C4	0.25	205	6.435	5.815	2.466	0.131
C5	0.262	125	6.735	6.087	2.581	0.137
C6	0.267	300	6.864	6.203	2.630	0.140
C7	0.273	200	7.035	6.358	2.696	0.143
C8	0.283	345	7.293	6.590	2.794	0.149
C9	0.283	485	7.293	6.590	2.794	0.149