Abstract：The doubly fed induction generator (DFIG) system is sensitive to the grid disturbance and even breakdown, when the stator is directly connected to the grid during the grid faults. The parameters of DFIG incurs an under damping response and a long time of the transient flux oscillation. It is unfavorable for the fast reactive power compensation during the low voltage ride-through(LVRT). A fourth-order dynamic d-q model of DFIG is used in the paper. And based on the eigenvalues of the system matrix, the different damping rates of the transient stator-flux and its influence factors are investigated. An improved control strategy with the flux active damping(FAD) control by the rotor side converter(RSC)is presented. The damping rate of the transient flux is accelerated and flux oscillation is eliminated by means of the proper control to the rotor currents. The simulation and experimental results validate the theoretical analysis and the feasibility of the proposed control strategy. The damping rate of the transient flux is accelerated; meanwhile the flux oscillation, overvoltage and overcurrent of the rotor are decreased.
张禄, 金新民, 战亮宇, 刘京斗. 电网电压对称跌落下的双馈感应风力发电机磁链有源衰减控制[J]. 电工技术学报, 2012, 27(9): 191-197.
Zhang Lu, Jin Xinmin, Zhan Liangyu, Liu Jingdou. Flux Active Damping Control of the Doubly Fed Induction Generator under Grid Voltage Symmetrical Dip. Transactions of China Electrotechnical Society, 2012, 27(9): 191-197.
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