TORQUE ESTIMATION OF DOUBLE FED INDUCTION GENERATOR USING A DYNAMIC MODEL AND MEASURED DATA

A big challenge in the Wind Power industry is the breakdown of gearboxes. To increase the knowledge about Wind Power and gearbox breakdowns Vattenfall has done measurements on both the mechanical and electrical system of a wind power turbine e.g. during full load and partial load. In this Master Thesis focus is on voltage and current measurements on the generator conductors and the measurements of the rotor speed. Different run scenarios for a wind power turbine have been studied and analysed briefly. Secondly a mathematical model in MATLAB/Simulink has been built, which calculates a corresponding mechanical torque based on the electrical measurements. To further improve the results from the model, more accurate speed measurements have to be done. For future work it would be interesting to compare the results from an improved model with mechanical measurements.