Yaw Sensor Misalignment Behind Long-Term Power Loss
"Kavaken uncovered a static yaw misalignment that had been quietly reducing power output for months. The calibration issue in the wind direction sensors was identified and corrected, restoring expected performance levels."
The Impact
The Issue
The turbine exhibited a steady decline in power curve performance over an extended period, diverging from both its historical trend and neighboring units. Despite stable wind and operational conditions, energy output remained below expectations, indicating a hidden alignment problem.
The Action
Kavaken’s analysis revealed that the wind direction and nacelle orientation sensors were misaligned, causing a static yaw error. The maintenance team recalibrated the sensors, aligning both the primary and backup systems. After correction, the turbine’s power curve returned to expected levels, confirming the resolution of the issue.