Power maximization and voltage sag/swell ride-through capability of PMSG based variable speed wind energy conversion system

The increasing penetration level of wind farms in power system network requires better understanding of short-term voltage stability and ride through capability before their interconnection to grid. The future wind turbines must stay connected irrespective of any type of disturbance in grid. To achieve reliable operation and control, the wind turbines must be actively controlled in order to meet the stringent grid interconnection requirements. This paper presents the modeling and performance analysis of wind energy conversion system (WECS) under different kind of grid disturbances. A model of directly driven, variable speed wind turbine based on multi-pole permanent magnet synchronous generator (PMSG) is developed and simulated in MATLAB/SPS environment. The simulation analysis demonstrates the maximum power extraction and enhanced ride through capability of WECS under three phase voltage sag/swell conditions.