Research and development of wind turbine generator systems.

This paper summarizes current progress on wind turbine generator systems (WTGS) R&D in Japan, especially those of the SUNSHINE project conducted by MITI. Recently, as the global environmental problem has arisen all over the world, the benefits of wind energy, as a clean, renewable energy resource, are more widely understood than before and not only the government but also utilities have started to accelerate R&D of WTGSs or windfarms.