Pump issues
Pump Failure
Pump failure can stop pitch movement from behaving as intended. It often escalates from smaller performance deviations into a sudden loss of pressure delivery. The operational consequence is typically unplanned downtime and periods of lost wind energy.
Understanding the Problem
Why does pump failure have a high operational impact?
The pump supports pressure supply across the pitch hydraulic system. When pump performance drops, the system may compensate more frequently and become less stable under load. If the pump can no longer deliver the required pressure or flow, pitch response may be limited or unavailable, and turbine operation can be affected immediately.
Typical symptoms
Pressure instability
Pressure becomes less steady during pitch activity or holding phases.
Slower or less consistent pitch response
Pitch movements may feel less sharp or require more time to reach position.
Increased pump activity
The pump runs more frequently to maintain expected system behaviour.
Temperature behaviour changes
Oil or system temperature trends may rise during periods of higher duty cycle.
Reduced hydraulic efficiency
More activity is required to achieve the same outcome as before.
Intermittent limitations during demanding conditions
Issues may appear first during high wind, frequent pitching, or rapid regulation.
Unplanned stop or derating events
Operational restrictions may occur when the system cannot maintain stable hydraulic performance.
Solution
Pump upgrade
A pump upgrade strengthens pressure delivery when the current pump no longer behaves consistently under operational load. The upgraded version is selected to address known performance patterns and support steadier hydraulic behaviour during pitching. This helps reduce repeated minor interventions and supports more stable turbine response in changing wind conditions.
