Research Article
Model-Based Fault Detection and Isolation of a Liquid-Cooled Frequency Converter on a Wind Turbine
Table 8
List of fault detection time for different faults in the cooling system.
| Fault | Detection time [s] |
| Startup faults |
| Air in cooling system | 30.1 | Phase module cooling channel clogging | 31.8 |
| Runtime faults |
| Pump delivery pressure decreasing | 47.7 | pipe clogging | 47.7 | Air-cooled heat exchanger Cooling effect decreasing | 32.5 | Temperature sensor — bias output | 0.8 |
|
|