双馈感应异步风力发电机组的低电压穿越求及技术分析

摘要

随着风电机组装机容量的持续高速增加,大规模风电场的建设,各个国家(地区)的电网对风电场的要求日趋严格.本文依据国内外的风电场接入电网规则,对风电场接入电网的低电压穿越(Low Voltage Ride Though,LVRT)要求做了详细介绍,并对目前风机主流机型双馈感应异步风力发电机组(Doubly-Fed Induction Generator,DGIG)的LVRT主要技术进行了综合分析与对比,最后对各技术进行改进并对该问题提出今后的研究方向.%With continuously rapid increase of the installed capacity of wind farms and building of large-scale wind farms, power grids in all the countries have imposed more strict requirements for wind farms. Based on the rules for the wind farm's accessing to the power grid both at home and abroad, this paper presents a detailed introduction to the requirements of the LVRT, and a comprehensive study on the main LVRT technology of the DFIG, which is universally used. Finally, suggestions are made on improvement of the technologies, and the direction for future research is pointed out.