Power Curve Restored After Blade Load Sensor Replacement
"A sudden drop in turbine performance was detected as it switched to a different power curve mode. Further analysis traced the cause to a faulty blade load sensor, which was replaced to restore full power output."
The Impact
The Issue
A drop in power curve performance was detected, showing that the turbine was operating in a reduced power mode. The most likely cause was a malfunction or parameter change in the blade load sensor, which triggered safe mode operation and limited power output.
The Action
Continuous monitoring revealed that the turbine was running in safe mode with its output capped at 2.5 MW. The service team replaced and recalibrated the blade load sensor on blade C, followed by an encoder replacement after the turbine failed to restart. Post-maintenance monitoring showed a gradual return to the expected power curve, confirming that the turbine’s normal operation was restored.