1. New Energy and Industrial Technology Development Organization. Lightning and protection in wind generator system, NEDO report No. NP-9814, NEDO, 1999 (in Japanese).
2. New Energy and Industrial Technology Development Organization. Wind Turbine Failures and Troubles Investigating Committee Annual Report, No. 10008694, 2006 (in Japanese).
3. New Energy and Industrial Technology Development Organization. Wind Turbine Failures and Troubles Investigating Committee Annual Report, No. 100010292, 2007 (in Japanese).
4. Sekioka S, Yamamoto K, Minowa M, Yokoyama S. Damages in Japanese wind turbine generator systems due to winter lightning. Proceedings of International Symposium on Lightning Protection, Foz do Iguacu, Brazil, 2007; 186â191.
5. New Energy and Industrial Technology Development Organization. Survey on domestic and international standardization and certification of wind turbine generator systems, No. 10007776, 2007 (in Japanese).