A Novel Ride-through Control Strategy of DFIG Wind Generator under Grid Voltage Dip

摘要

With the increasing of wind penetration in power systems, new grid codes require distributed energy resources to ride through temporary low voltage event and at the same time injecting reactive current into the grid. The purpose of this paper is to optimize control strategy and enhance the performances of the doubly fed induction generator wind power system by using the combination of double-vector-PWM control and the active crowbar in series with the stator windings. The analysis and simulation results with the software MATLAB are included. This control strategy can notably reduce the stator and rotor over-current and keep the dc bus voltage stable, which prevent the damages that voltage clips cause on the converter and power system.