Research Article

Model-Based Fault Detection and Isolation of a Liquid-Cooled Frequency Converter on a Wind Turbine

Table 7

Classes of faults in the cooling system.

Fault Category

 Startup faults

Air in cooling system Process fault
Phase module coolingProcess fault
Channel Clogging

 Runtime faults

Pump delivery pressure decreasing Actuator fault
Pipe clogging Process fault
Air-cooled heat exchanger Actuator fault
Cooling effect decreasing
Temperature sensor defect Sensor fault