A Methodology for Evaluation of Operational Zones for Distributed Generation Based on DFIG

This study developed a methodology to determine zones of acceptable voltage profiles for wind power generation connected to distribution systems. Three load profiles (residential, commercial and industrial) connected to the distribution network were analyzed considering the impact on voltage levels and steady-state stability for different wind speeds and wind generator control strategies. The wind generator model is based on doubly fed induction generator (DFIG) and were developed using Matlab/Simulink. The presented methodology can be used to map the impact on operation of different types of control, the time of day and the available wind speed and it is not limited only for DFIG. The results have shown that the methodology helps to find zones were the combination of wind speed, load demand and control strategy can lead the system to voltage levels outside the standard limits. The determination of these zones of inoperability helps the utilities to avoid and prevent the system from fail.