MONITORING METHOD AND SYSTEM FOR WIND TURBINE GENERATOR

摘要

In a method for monitoring a wind turbine generator 1 configured to generate power by transmitting energy of wind from a rotor 4 including a blade 5 and a hub 6 to a generator 18 via an energy transmission pathway arranged from the rotor 4 to the generator 18: energy transmission efficiency in a monitoring object part located on the energy transmission pathway, such as a hydraulic transmission 10, is calculated from input energy inputted to the monitoring object part and output energy outputted from the monitoring object part; temporal change of the energy transmission efficiency is obtained from the calculated energy transmission efficiency in the past; energy transmission efficiency in the future is estimated based on the temporal change; and maintenance timing is determined based on the estimated energy transmission efficiency.