电力系统保护与控制2011，Vol.39Issue(16)：101-106,6.
电网不对称故障下双馈风力发电机组穿越控制的研究
Research on asymmetrical faults ride-through control of Doubly Fed Induction Generator (DFIG)
苏平 1付纪华 1赵新志 1翟来 1刘军 1党琦1
作者信息
- 1. 陕西省电力公司西安输变电运行公司,陕西西安710075
- 折叠
摘要
Abstract
Based on the effect of the asymmetric grid voltage on DFIG and the positive and negative sequence mathematical model of DFIG, this paper analyses the composition of output active and reactive power of the DFIG stator and the generator electromagnetic torque under asymmetrical grid-voltage condition. Considering the effect on stator side active and reactive power, electromagnetic torque, and DC side voltage caused by the negative sequence current, a current positive sequence component tracking control strategy is proposed, and the positive and negative sequence components of grid voltage are processed separately both in the rotor side converter control and the grid side converter control. Hysteretic positive sequence current tracking control technology is applied to the rotor side converter, which achieves a current non-poor tracking. Current feedforward control technology is introduced into the inner ring of grid side inverter control, which ensures that negative sequence current is zero, while the outer ring adopts voltage ring to stabilize DC link voltage. Finally, the control strategy is simulated, and the simulation results demonstrate that the control strategy can eliminate the effect of the negative sequence current and realizes the asymmetrical faults ride-through.关键词
双馈感应电机/不对称故障/风力发电/对称分量法/故障穿越Key words
doubly fed induction generator (DFIG)/ asymmetrical faults/ wind power/ symmetrical components/ fault ride through分类
信息技术与安全科学引用本文复制引用
苏平,付纪华,赵新志,翟来,刘军,党琦..电网不对称故障下双馈风力发电机组穿越控制的研究[J].电力系统保护与控制,2011,39(16):101-106,6.
