摘要
近年来风力发电占电力系统比重增长迅速。在电网出现故障导致电压跌落后,风力机组如果纷纷解列会带来系统暂态不稳定,并可能造成局部甚至是系统全面瘫痪,故人们开始关注风机并网并相应提出了低电压穿越(LVRT)要求。文中以北方某风电场中安装的双馈异步风力发电机(DFIG)和直驱永磁风力发电机(PMSG)两种机型为实例,在分析了二者实现低电压穿越功能原理的同时,利用电力系统仿真分析软件PSASP对两种机型的低电压穿越能力进行仿真,并根据仿真结果给出两种机型实际工作中的低电压穿越能力的最低电压限值。最后通过对比,分析两种机型各自低电压穿越能力的优越性。
With the increasing of the wind power installed capacity in the proportion of grid, the impact be- comes bigger and bigger, so the grid brings forward some corresponding requirements for the wind power sys- tem, emphasizing the low voltage ride through（LVRT） function is one of the requirements. This paper takes two kinds of wind turbine（ DFIG and PMSG）which are installed in the north wind farm for example ,analyzing the principle of LVRT of the two wind turbines at the same time, the author makes a simulation by the PSASP soft- ware, and based on the simulation result, the minimal voltage limit of LVRT of wind turbines is given. Finally, by the comparing, the advantage of LVRT of DFIG and PMSG is analyzed.
出处
《东北电力大学学报》
2012年第6期18-21,共4页
Journal of Northeast Electric Power University
