姜惠兰;贾燕琪;周陶;周照清;张驰;

• 1:智能电网教育部重点实验室(天津大学)

摘要(Abstract)：

双馈异步风力发电机对电网电压扰动比较敏感,其低电压穿越技术仍是目前研究的热点问题。针对定子串联电抗穿越方式电抗取值小难以有效抑制故障过电流,取值大又限制转子侧变流器功率控制能力的矛盾,提出一种基于定子串联动态电抗的综合低电压穿越策略,在理论分析定子串联电抗值及切换时刻合理整定方法的基础上,制定了大、小电抗双模式切换的低电压穿越方案。为进一步提高穿越性能,大电抗模式下RSC采用暂态磁链主动衰减控制策略以尽快进入小电抗阶段,小电抗模式下RSC采用无功支撑为主、有功为辅的功率协调控制策略。仿真结果表明,所给出的穿越策略有效抑制了故障期间转子过电流,提高了DFIG的无功输出能力,同时降低了电压恢复期间的电抗切除冲击。

关键词(KeyWords)： 双馈风力发电机;低电压穿越;定子串联动态电抗;磁链主动衰减控制;功率协调控制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51477115)~~

作者(Author): 姜惠兰;贾燕琪;周陶;周照清;张驰;

Email:

DOI: 10.13335/j.1000-3673.pst.2018.0649

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