Drive-train characteristics of constant speed HAWT's : part I - representation by simple dynamic models

The overall dynamic behaviour and hence performance of a grid-connected constant speed honzontal-axis wind turbine is due to a combination of the structural dynamics, the drive-train and generator dynamics and. when appropriate, the control system dynamics . A dynamically well-behaved machine requires that the drive-train dynamics complement in some sense the other wind turbine dynamics. In this , the first part of a two part paper, the dynamics of the drive-train are investigated. Although a composite of many dynamic modes of the tower, blades, hub, low-speed shaft, gearbox, gear-train, high-speed shaft and generator rotor. the drive-train dynamics can be represented by a simple model. The simple model approximates very closely to the drive-train dynamics for almost all constant speed wind turbines