张隆,杨俊华,王秋晶,陈思哲,吴捷.基于Crowbar的双馈风电系统低电压故障下无功控制[J].电测与仪表,2015,52(14):. ZHANG long,YANG Jun-hua,WANG Qiu-jing,CHEN Si-zhe,WU Jie.Reactive Power Control of Crowbar-based Doubly-fed Induction Generator During the Grid Voltage Sag[J].Electrical Measurement & Instrumentation,2015,52(14):.
基于Crowbar的双馈风电系统低电压故障下无功控制
Reactive Power Control of Crowbar-based Doubly-fed Induction Generator During the Grid Voltage Sag
The vast grid reactive power would be absorbed by the crowbar-based doubly-fed induction generator (DFIG) wind turbine when grid voltage dip fault.The model of pitch control and STATCOM were built by analyzing the characteristics of DFIG system at grid fault.During the crowbar circuit active, the slip of DFIG could be restrained with pitch controller to reduce the amount of reactive power consumption.The grid side converter was switched to STATCOM operation mode to compensate reactive power of DFIG system.With PSCAD/EMTDC simulation platform, the dynamic process of DFIG system was simulated during the voltage sag.The simulation results show that the amount of reactive power absorbed by DFIG system from grid can be avoided with the proposed control strategy during voltage sag,which contributes to the recovery of the grid voltage.The effectiveness and correctness of the proposed control strategy are verified.
