Inspecting turbine runners in pumped hydro storage systems is crucial for ensuring efficient operation and preventing damage. Key factors determining the inspection frequency include:
Key Factors
- Age and Condition of the Turbine: Older turbines may require more frequent inspections due to increased susceptibility to fatigue and cracks, especially if they have undergone extensive repairs.
- Operating Conditions and History: Turbines operated in “rough zones” or under frequent starts and stops may need more frequent checks due to increased wear.
- Maintenance History: The amount and type of corrective maintenance performed on the turbine can indicate its condition and influence the inspection schedule.
- Cavitation Damage: Frequent inspections are critical for detecting cavitation pitting, especially during initial operations or when modifications are made to the runner profile.
- Frequency of Operations: Pump-turbines, which experience severe cavitation during pumping mode, require inspections every 12,000 operating hours or every two years.
- Specific Operational Issues: Blade cracking, seal wear, or other specific problems can necessitate more frequent inspections.
- Scheduling with Maintenance Outages: Inspections are typically performed during scheduled major maintenance to minimize downtime.
These factors guide the development of an effective inspection schedule that ensures the longevity and efficiency of the turbine runner while minimizing operational risks.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-key-factors-that-determine-the-inspection-frequency-of-a-turbine-runner-in-a-pumped-hydro-storage-system/
