AXIS Explores Failures, Defects and Damage: Onshore Wind

AXIS EXPLORES: FAILURES, DEFECTS AND DAMAGE - ONSHORE WINDDan Stevens Head of Engineering, Renewable Energy AXIS InsuranceThis report focuses on common causes of downtime on Wind Turbine Generators (WTG’s).Contents

INTRODUCTION

This report focuses on common causes of downtime on Wind Turbine Generators (WTG), including damage from wear and tear and typical causes of failures, focusing on defects.

Natural catastrophe (NATCAT) perils are not covered here.

This report covers:

Blades

Overview
Types of damage
- Leading edge erosion
- Lightning damage
- Delamination

Gearboxes

Overview
Types of damage
- Bearings
- Gearbox teeth

Generators

Overview
- Doubly Fed Induction Generators (DFIG)
- Permanent Magnet Generators (PMG)
Types of damage

Onshore foundations

Overview
Types of failure