The Impact of SCIG Wind Farm Connecting into a Distribution System

Increasing capacity of connected wind power generation to utilities brings new opportunities and also problems to the utilities and customers. Evolution and analyzing of the connection conditions and effects of wind farms especially on remote areas are the main aspects of developing wind power on the utilities, because the impact will be more serious. The problem is that these wind turbine that mostly uses induction generators, tend to drain large amounts of VArs from the grid, potentially causing low voltage and maybe voltage stability problems for the utility owner, especially in the case of large load variation on distribution feeder. Focus on researching and discussing the impact ahead of time, and find the way out to supply higher power quality, this paper chooses Matlab/Simulink as analyzing tool, and uses SCIG model of asynchronous generator and a 33-bus distribution system of Tai-Power Company for simulation. Case study includes choosing different connected location and installed capacity of wind generators (WGs) and adopting fixed capacitors, SVC and STATCOM, respectively, for compensation to observe the influence on the moment of the wind generator connected and the period of the wind speed variation. Finally, from the simulation results, some discussions and suggestions are proposed for utilities in this paper.