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Component affected | Effect | Causes | Risk | Solutions |
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Turbine | Blade fracture | Excessive loading from wind gusts or icing | Blade pieces and dislodged ice flying off risking damage to other turbines and personnel | Emergency shutdown in high gust or ice situations Deicing systems incorporated in rotor blades |
Lightning strike | Strikes by lightning | Fire | Lightning earthing system incorporated in rotor blade |
Hydraulic failure | Control system malfunction, environmental degradation | Loss of timely control Fire from leaking oil | Timely preventive maintenance |
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Gearbox | Gearbox failure | Insufficient lubrication | Worn or fractured gears, fire | Use of sufficient and correct high quality lubricants Sufficient lubricant cooling system |
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Generator | Windings open circuit, winding insulation failure | High operating temperatures, transient voltages and currents | Reduced or stoppage of power production | Regulation of voltages and currents to ensure stable operating temperatures |
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PEC | Semiconductor device failure Failure of bond wire connection | Thermal cycling | Output power fluctuations | Control that reduces thermal variations |
DC-link capacitor failures | Voltage fluctuations, harmonic currents | Reduced output power, increased fluctuations in output currents | Control that reduces voltage variations across the capacitor |
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