Aiming at the risk of over-speed and off-grid in the high voltage ride through of doubly fed wind turbines based on the traditional control strategy,a high voltage ride through control strategy considering the pitch angle control was proposed.During the high voltage ride through period,on the one hand,it provided reactive power support for the grid by controlling the wind turbine;on the other hand,when the rotor speed reached the reference value,the pitch angle control was started to inhibit the rotor speed rise.The simulation results show that compared with the traditional control strategy,the proposed control strategy can enable the doubly fed wind turbines to achieve high voltage ride through under the two objectives of providing reactive power support to the grid and avoiding rotor speed overrun.
关键词
双馈感应发电机/高电压穿越/控制策略/桨距角控制/超速脱网
Key words
doubly-fed induction generator/high voltage ride through/control strategy/pitch angle control/over-speed tripped off from grid
维普
万方数据