Fault Detection of Wind Turbine Pitch System Based on Multiclass Optimal Margin Distribution Machine

Table 2

Some data of faulty fan on July 23, 2016.

Status parameter	Time
	0:38:02	0:40:14	0:46:18	0:55:46	1:01:42	1:05:16	1:16:22	1:21:08	1:32:34	1:40:22
Rotor speed (r/m)	17.38	16.97	9.36	1.23	0	0	0	0	0.21	0.14
Generator speed (r/m)	1763.6	1702.8	1214.6	27.3	8.9	7.3	9.0	6.1	953.4	1651.6
Temperature of bearing A (°C)	43.8	42.6	44.0	47.7	48.5	48.4	47.1	46.7	454	45.2
Temperature of bearing B (°C)	45.1	45.8	46.2	44.5	48.8	47.3	46.4	45.5	46.8	47.1
Current of pitch motor 1 (A)	120	80	0	0	0	0	0	0	0	40
Current of pitch motor 2 (A)	70	50	20	0	0	0	0	0	30	20
Current of pitch motor 3 (A)	50	40	40	0	0	0	0	0	10	50
Brake pressure (N)	0	27.53	110.14	124.47	160.29	143.21	120.45	150.41	140.12	134.47
1 min average wind speed (m/s)	8.32	9.95	10.39	8.87	9.81	10.32	11.14	9.48	8.22	9.13
U1 phase winding current (A)	890	832	32	6	6	6	6	6	4	4
U2 phase winding current (A)	883	838	37	6	6	6	6	6	4	4
U3 phase winding current (A)	880	828	35	6	6	6	6	6	4	4
Lubricant filter inlet pressure (N)	−3.96	−3.78	−3.67	−3.54	−3.66	−3.92	−3.96	−3.88	−3.68	−3.86
Lubricant filter outlet pressure (N)	5.77	6.04	3.03	2.78	4.66	3.45	6.20	2.97	3.42	2.64
Pressure of main hydraulic system (N)	143.12	151.24	160.14	152.13	130.24	163.48	153.46	143.34	132.04	130.19
Wind angle (°)	4.21	3.24	5.25	3.54	2.14	1.67	3.45	2.87	2.21	4.15
Grid voltage (kV)	407.2	406.4	405.7	407.2	403.1	401.8	406.7	405.3	404.1	405.9
Pitch angle 1 (°)	0.25	0.33	89.04	89.04	89.04	89.04	89.04	89.04	89.04	89.04
Pitch angle 2 (°)	0.27	0.34	89.02	89.02	89.02	89.02	89.02	89.02	89.02	89.02
Pitch angle 3 (°)	0.27	0.33	89.04	89.04	89.04	89.04	89.04	89.04	89.04	89.04
Pitch controller location (°)	56.21	52.47	0	0	0	0	0	0	0	0
Voltage of pitch capacitor (V)	59.23	59.17	59.10	59.11	59.14	59.18	59.17	59.21	59.33	59.12
Yaw speed (°/s)	0	0.12	0	0	0	0	0	0	0	0
Nacelle vibration (mm)	0.06	0.04	0.01	0.01	0.01	0.02	0.02	0.01	0.02	0.03
Gearbox inlet oil temperature (°C)	46.5	44.1	45.6	43.9	43.2	44.5	44.7	43.5	42.3	44.9
Generator torque deviation (N·m)	56.63	44.12	23.14	17.19	0.12	0.11	0	0	0	0