Effects of the wind turbines on the power quality-a modeling approach

The importance of renewable energy sources has increased gradually on the present energy production while the supply of fossil fuels began to run out of late years. Among these renewable energy sources, wind energy comes into prominence owing to it is a clean, sustainable and cost-effective energy. However, the connection of large wind farms to the grid may cause problems in terms of power quality due to the variability of the energy extracted from the wind. The problems related with the power quality are striven to solve after the grid integration of wind farms. However, the precautions that can be taken by means of the assessments before the installation of the turbines represent an easier and economic way.In the thesis, the possible effects of the grid connected wind turbines on the power quality characteristics have been defined and the MATLAB based models have been constructed so as to calculate these effects. Particularly, fast voltage variations that are difficult to model due to its relation with the human factor have been analyzed in detail. It has been aimed that the models are able to use in practice while utilizing various standards such as IEC 61400-21 and IEC 61000-4-15 in order to set up the models. In the last section of the thesis, the analyses of the implementations that represent constraints for exploiting the wind resources in Turkey have been realized in terms of production and consumption with a case study.