摘要
随着风力机组装机容量的增加,电网出现故障导致电压跌落后,机组如果解列将会导致系统暂态不稳定、低电压穿越(LVRT)的问题逐渐引起人们的广泛关注。文章分析了云南雷应山风电场部分风机脱网事件产生原因,在此基础上提出了建立电网电压跌落时双馈异步机组(DFIG)的数学模型以及静止同步补偿器(STATCOM)应用于风电场的控制模型,并在Matlab/Simulink中对基于DFIG的风电场和STATCOM进行建模。研究结果表明,STATCOM在电网发生单相接地故障时能够帮助风电场快速的重建电压,确保风电机组连续运行。
With rapid increase of the installed capacity of wind turbines, wind generators tripping from the grid will lead to transient instabilities when the grids faults result in voltage decline. So the request of the low voltage ride through（LVRT） ability is focused on. In this paper the reasons of abnormal disconnection of wind turbines from Yunnan Lei yingshan wind farm are introduced; a mathematical model of Doubly Fed Induction Generator（DFIG） and the mechanism of static synchronous compensator（STATCOM） applied to wind farm are analyzed. A simulation model is built with Simulink in Matlab software for a large-scale wind farm based on doubly-fed induction generator and STATCOM. Research results show that STATCOM can support wind farm to rebuilt voltage rapidly under single phase ground fault case and ensure the continuous operation of wind generation sets.
出处
《可再生能源》
CAS
北大核心
2015年第4期551-557,共7页
Renewable Energy Resources
