Research Article
Fault Detection of Wind Turbine Pitch System Based on Multiclass Optimal Margin Distribution Machine
Table 3
Some correlation calculation results 1.
| | Status parameter | Pearson correlation coefficient | | Rotor speed (r/m) | 0.97753 | | Generator speed (r/m) | −0.99738 | | Temperature of bearing A (°C) | 0.33852 | | Temperature of bearing B (°C) | −0.26418 | | Current of pitch motor 1 (A) | 0.79989 | | 1 min average wind speed (m/s) | −0.20292 | | U1 phase winding current (A) | 0.99992 | | U2 phase winding current (A) | 0.99988 | | Pitch angle 2 (°) | −0.94072 | | Pitch angle 3 (°) | −0.95908 | | Yaw speed (°/s) | 0.03103 | | Voltage of pitch capacitor (V) | 0.56784 | | Pressure of main hydraulic system (N) | 0.02426 | | U3 phase winding current (A) | 0.99985 | | Current of pitch motor 2 (A) | 0.80794 | | Lubricant filter inlet pressure (N) | −0.02909 | | Lubricant filter outlet pressure (N) | −0.81853 | | Current of pitch motor 3 (A) | 0.80471 | | Wind angle (°) | 0.21073 | | Grid voltage (kV) | −0.88644 | | Pitch angle 1 (°) | −0.94581 | | Nacelle vibration (mm) | 0.58414 | | Brake pressure (N) | 0.12353 | | Gearbox inlet oil temperature (°C) | −0.25683 | | Generator torque deviation (N·m) | −0.85781 | | Pitch controller location (°) | −0.85769 |
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