Abstract
The 500 kW wind generator was developed as one of NEDO's projects, and several tests on its performance have been made so far. Based on the measurement data, we performed the modeling of the NEDO 500 kW wind generator and have investigated a method to reduce power variations under fluctuating wind conditions in complex terrain. In a control system design of a wind generator, It is important to obtain effective wind speed to drive a wind turbine. This paper presents an estimating method of wind speed acting on a wind turbine using a wind generator itself. The result showed that estimating wind speed almost agrees measured wind speed.