Lightning protection of wind turbine regarding with risk management

This paper proposes a concept of lightning protection of wind turbine from the viewpoint of risk management. Lightning protection of wind turbine including design by manufactures and maintenance by operators should be done from the viewpoint of risk management. It is important to understand damage aspects, possible causes and corresponding countermeasures to satisfy both of safety and economic operation. The concept from risk management will help to establish reasonable countermeasures depends on damage levels with appropriate cost-benefit balance, which finally realises reduction of lightning incidents and improvement of turbine availability.