Presentations

Abstract

This case study presents insights from almost 10 years of practical experience conducting wind turbine life extension assessments across multiple onshore wind projects in Portugal. The study wind turbines operating near or beyond their original design life, aiming to identify the most critical drivers for extending operational viability while ensuring structural, functional and economic feasibility. We have systematically evaluated structural integrity, component-level degradation, and operational histories using SCADA data, on-site inspections, and fatigue load aeroelastic calculations of many diferent projects and can share valuable insights about most frequent pathologies encountered, how these pathologies evolve over time and how predictive indicators can inform targeted intervention strategies. In parallel, we explore the impact of environmental conditions specific to Portugal on turbine and component aging, along with owner/operator decision-making under changing market conditions and regulatory frameworks. The case also compares the effectiveness of different life extension strategies—including retrofit technologies, condition-based maintenance, and partial repowering—and assesses the role of digital tools like SCADA analytics. Finally, we reflect on the future of life extension in Portugal and beyond, discussing how focussed approaches and technology support could could push even further the next generation of asset management for these aging wind fleets.