Wind turbine modeling, LVRT field test and certification

The need to validate wind turbine models for the use in grid integration studies is addressed in an increasing number of grid codes. In several countries (Spain, Australia, UK, Germany) requirements for simulation models are now required for the grid access of wind turbines. In Germany, triggered by the new renewable energy law (EEG), a guideline for validating electrical simulation models of wind turbines has been designed. The model validation approach chosen will be described. The aim of this validation approach is to quantify the error between measurement and simulation. This is necessary in order to give a reliable figure for the model uncertainty for the use of the model in studies. Results of FRT-measurements with balanced and unbalanced faults will be compared to the results of an RMS DFIG model. It can be shown that the validation approach can be applied with success both to balanced and unbalanced faults.