电网电压不平衡时基于谐振闭环调节的双馈异步发电机转矩波动抑制策略.pdfVIP

第35 卷 第7 期 中 国 电 机 工 程 学 报 Vol.35 No.7 Apr.5, 2015 1756 2015 年4 月5 日 Proceedings of the CSEE ©2015 Chin.Soc.for Elec.Eng. DOI ：10.13334/j.0258-8013.pcsee.2015.07.025 文章编号：0258-8013 (2015) 07-1756-12 中图分类号：TM 315 电网电压不平衡时基于谐振闭环调节的 双馈异步发电机转矩波动抑制策略 程鹏，年珩 (浙江大学电气工程学院，浙江省 杭州市 310027) Torque Ripple Restraint Strategy of DFIG Under Unbalanced Grid Voltage Conditions Based on Resonant Control Loop CHENG Peng, NIAN Heng (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China) ABSTRACT: Unbalanced grid voltages can cause torque 关键词：不平衡电网电压；双馈异步发电机(DFIG) ；谐振调 ripples at the twice fundamental frequency in the doubly fed 节器；转矩波动抑制 induction generator (DFIG), which might impair the drive train 0 引言 of wind power generation systems and reduce the operation reliability and life time. This paper proposed a torque ripple 目前，采用双馈异步发电机(doubly fed induction restraint strategy on the DFIG based on the resonant control generator，DFIG) 的风电机组(wind energy conversion loop, in which a torque resonant control loop was added to the conventional rotor current loop so as to implement the torque system，WECS) 由于具有有功无功独立调节、变流 ripple restraint. The design of the resonant regulator in the 器容量小、成本较低等优势，在风电场中得到了广 proposed technique was investigated and the impacts on the 泛的应用[1-3] 。但由于DFIG 定子直接与电网相连， operation performance using second-order resonant controllers