Generic Simulation Model for DFIG and Full Size Converter based Wind Turbines

There is an increased international interest in electrical simulation models of wind turbines for stability analysis and interconnection studies. So-called "generic" models, with a model structure that is publicly available, have been required in the USA by many utilities. A working group of the Western Electricity Coordinating Council (WECC) and IEEE has developed models for different types of generators, among others for wind turbines using doubly fed induction generators (DFIG) and full size converters (FSC). Those models were so far mainly used in the USA, and the models were able to represent wind turbines with respect to common US grid code requirements. Due to an increased international interest in generic models, there is a need for updating existing models in order to (1) improve the representation of specific grid code requirements like reactive power contribution during grid faults, (2) to take into account ongoing technological developments (especially of DFIG) and (3) to improve the accuracy of the model since validation requirements in many countries now require a comparison with measurements. The generic generator model presented in this paper allows an improvement of existing WECC/IEEE type 3 (DFIG) and type 4 (FSC) models especially during grid faults and during voltage recovery. The model is designed to represent both modern DFIG and different types of full size converter wind turbines. The results of simulations using the proposed generator model are compared to measurements of voltage dips. The new generic generator model will be proposed as extension for the WECC/IEEE generator models as well as basis for the draft of the IEC TC88 working group 27 (61400-27) on modeling and model validation.