Abstract
The fault ride through capability of wind turbine is becoming more important with the rapid growth of wind power installed capacity. Among several grid faults the voltage swell is a critical event. Thus, to enhance the high voltage ride through capability of popular PMSG-based wind turbine, the behavior of the PMSG wind turbine when subjected to a voltage swell was analyzed and a strategy was proposed. The overvoltage results in an increasing converter DC bus voltage. By analyzing the vector diagram of line-side converter, the paper recommends increasing inductive current assisted with chopper resistors to ride through the overvoltage safely, and the reactive current reference calculation method is given. The analysis of the performance and the strategy is presented and verified by simulations with a 1.5MW PMSG wind turbine simulation model.
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