The Research on Control Strategy of High Voltage Ride Through for PMSG Based on Dual-modes Control

To improve the ability of the high voltage ride through for wind turbines with the direct-driven permanent magnet synchronous generator, a kind of control strategy of high voltage ride through based on dual-modes control is proposed according to research on the operational characteristics of the wind generators. According to the surge swelling of the grid voltage and the increasing of DC bus voltage, the control mode of converter on the grid side is converted via the mode selector, which makes direct-driven wind generators have such ability as the high voltage ride through. The simulation results by using PSCAD simulation platform and the application results show that this control strategy can not only ensure the wind turbines with direct-driven permanent magnet synchronous generator working continuously during grid voltage swells, but also can effectively improve the reactive power compensation capabilities of wind generators, which benefit for the operation security and stability of the grid.