ToolFusion
πŸ“‹ Case Study

Formosa 2 Array Cable Lifetime Modeling Under Typhoon Loading

Predicting XLPE insulation degradation under combined thermal cycling (daily), electrical stress (harmonics), and mechanical fatigue (typhoon-induced seabed motion)

πŸ—οΈ Project Overview

604 MW Taiwan Strait offshore wind farm (Ørsted, JERA, Macquarie)

🎯 Challenge

Predicting XLPE insulation degradation under combined thermal cycling (daily), electrical stress (harmonics), and mechanical fatigue (typhoon-induced seabed motion)

πŸ”§ Design Approach

Physics-based lifetime model integrating Arrhenius thermal aging, space charge accumulation simulations, and Miner’s rule for cyclic strain

πŸ“ Design Diagram

Formosa 2 Array Cable Lifetime Modeling Under Typhoon Loading Challenges: β€’ Thermal cycling β€’ Electrical harmonics β€’ Seabed motion fatigue Physics-Based Lifetime Model Arrhenius Thermal Aging Space Charge Simulation Miner’s Rule Cyclic Strain CDI = 0.68 (Critical Threshold: 1.0) Challenge Core Model Sub-model

AI-generated project design illustration

πŸ“ Key Calculations

Cumulative Damage Index

CDI = Ξ£(n_i/N_i)
Result: 0.68
Indicates 68% of design life consumed after 15 years

πŸ“Š Results

Extended warranty period from 20 to 25 years; validated through accelerated aging tests matching field-measured partial discharge trends

πŸ’‘ Lessons Learned

  • β€’Harmonic content from VSC converters accelerates space charge accumulation
  • β€’Typhoon recurrence interval must be modeled stochastically, not deterministically

βœ… Key Takeaways

  • 1Harmonic content from VSC converters accelerates space charge accumulation
  • 2Typhoon recurrence interval must be modeled stochastically, not deterministically