摘要
随着以变速恒频双馈感应发电机(DFIG)为主体的大型风力发电机组单机容量的不断增大,电力系统对并网风力发电机在外部电网故障,特别是电网电压骤降故障下的不间断运行能力提出了更高要求。此处在深入分析DFIG弱阻尼特性的基础上,采用了一种新型的控制策略,在电流环中加入了有源阻尼后,对外部扰动有了明显的抑制作用。通过Matlab/Simulink仿真分析了加入有源阻尼后双馈发电机的特性,最后对此控制策略进行了实验验证,结果验证了控制策略的有效性。
With the increasing of unit capacity of variable speed constant frequency doubly-fed induction generator（DFIG） as the main large-scale wind turbine,the power systems proposes a higher requirements to wind turbines in the external power network failure,especially for the uninterrupted operation capacity under grid voltage sag fault.Based on the analysis of weak damping of DFIG,a new control in the current loop after adding an active damping is uti-lized and the external disturbance is inhibited.The characteristic of active damping is simulated by Matlab/Simulink and the experiment is carried out for this control strategy.The results validate this control method is effective.
出处
《电力电子技术》
CSCD
北大核心
2011年第8期42-44,共3页
Power Electronics
基金
国家自然科学基金项目(51077034)
安徽省自然科学基金(090412049)~~
关键词
风力发电
双馈发电机
低电压穿越
有源阻尼
wind power generation
doubly-fed induction generator
low voltage ride-through
active damping
