电气传动2017，Vol.47Issue(11)：50-54,5.DOI:10.19457/j.1001-2095.20171110
双馈风电系统低电压穿越的联合控制策略
Joint Control Strategy for Low Voltage Ride Through in Doubly Fed Wind Power System
王归新 1司新放1
作者信息
- 1. 三峡大学电气与新能源学院,湖北 宜昌 443002
- 折叠
摘要
Abstract
Because the stator windings of doubly-fed induction generator is connected with the power grid directly,it is easy to be affected by the voltage fault of the grid. The main low-voltage ride-through technology of DFIG has de-excitation control and crowbar control etc. By controlling the rotor side converter(RSC),the de-excitation control obtains an appropriate rotor magnetic field to offset the transient component in the stator flux. Because of the rotor side converter capacity limit,de-excitation control can only pass through slight voltage sags. A more common approach for severe grid voltage sag failures is that a crowbar circuit is used to bypass the rotor side converter. But the use of crowbar circuit can only ensure the safety of double-fed wind power system ,can not help grid voltage recovery. A de-excitation control and crowbar circuit combination LVRT scheme was proposed ,and a simulation experiment was carried out using Matlab/Simulink software. The simulation results show that the proposed scheme can improve the LVRT capability of DFIG wind power system.关键词
双馈风力发电机/低电压穿越/灭磁控制/撬棒电路Key words
double-fed induction generator(DFIG)/low-voltage ride-through(LVRT)/de-excitation control/crowbar circuit分类
信息技术与安全科学引用本文复制引用
王归新,司新放..双馈风电系统低电压穿越的联合控制策略[J].电气传动,2017,47(11):50-54,5.
