The aim of this project is to develop well and suitable models of the electric drive system for integration with the mechanical system in a wind turbine. There are several different drive system used today, the project will develop and adopt models of the most common ones. In the later stage of the project is the goal to optimize and integrate the electrical and mechanical system for the future wind turbine. Validation against measurements of the used models is an important part of the project. Measurements in a 4 MW wind turbine are a part of the project. The work involves model development for generators, power electronic converters and analysis due to dynamic/transient behavior in the grid. The drive train will be modelled using two different methods were one is state space, which will be more general and will take less time to solve but won’t consider every aspect of the electrical drive train. An advantage of the state space model is that it can be shared and used in others projects, and in a similar manner can state space models from other projects be used in this project to get more accurate behaviour.
The second method will consider more electrical phenomena’s as the generator will be models using finite element method which will be linked to a circuit simulator software where the power electronic converter will be more highly detailed.
Also diagnostics methods will be developed; by using the models developed in the first part of the project, to investigate the possibilities to find failures in the wind turbine, both mechanical as well as electrical ones. The idea is that the models will be used both for detecting faults, or rather that where a fault will occur, and for testing different strategies on what should be done when a fault occurs.