摘要：随着电网对风力发电机组并网要求的不断提高，以及风电机组后期运维不足等原因，这些都对风电变流器的控制性能提出了较高的要求。为了能够满足非理想电网下双馈风力发电机（DFIG）的正常运行，同时有效保护变流器安全，利用电网电压有效值和两相瞬时旋转分量作为电压工况判断条件，并结合变流器的过流和过压情况，提出了多模分段控制策略。通过电流内环PR和PI调节器的分段设计，可以有效降低过转子电流的幅值。在15MW满载、基于PR调节器在单相电压跌落10%、单相电压跌落到20%的低电压穿越等工况下，分别验证了该控制策略，最后实验验证了该策略的正确性和有效性。
关键词：风力发电；非理想电网；DFIG；多模分段控制；实验验证
Abstract: With the continuous improvement of grid conditions demands wind power generator set，and there is a general lack of after services，those all propose the high demands for wind power generator set. For satisfied the normal operation under nonideal grid conditions and protected convertor safety，the RMS and twophase instantaneous  rotational component  of voltage were used, besides, consider overcurrent and overvoltage of convertor ，multipattern sectional control strategy were proposed. The current amplitude was reduced  through the PR and PI regulator are designed for current inner loop. The strategy is validated in 15 MW full load,single phase voltage sag in 10% based on PR regulator,single phase voltage sag to 20% of low voltage ride through，the result of  experimental verification showed the correctness and effectiveness of the control strategy.
Key words: wind power; nonideal grid conditions; DFIG; multipattern sectional control; experimental verification