| Abstract |
The low switching frequency of medium voltage drives requires an accurate current control model to design the controller, as delays and discretization process are no longer negligible. In addition, the gridimpedance and the feed-forward voltage also affect the response of the system. This paper presents aprocedure that exactly models the current control loop of a medium voltage wind farm. The modelingprocedure is experimentally validated.An exact current control model allows the designer to tune the controller and analyze the stability of awind farm under different circumstances, such as different grid short circuit ratios (SCR) with a highreliability. The differences with the experimental results will only be limited to deviations between theimpedances of the model and real plant. |
