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首页> 外文期刊>Electric Power Applications, IET >Modelling and control of a multi-phase permanent magnet synchronous generator and efficient hybrid 3L-converters for large direct-drive wind turbines
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Modelling and control of a multi-phase permanent magnet synchronous generator and efficient hybrid 3L-converters for large direct-drive wind turbines

机译：大型直驱风力涡轮机的多相永磁同步发电机和高效混合式3L转换器的建模和控制

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摘要

A novel full-size wind power conversion system based on a multiphase permanent magnet synchronous generator (MPPMSG) and hybrid multi-converter system using 3-level neutral-point-clamp converters (3L-NPC) for high-power direct-drive wind turbines is proposed in this study. Higher efficiency, lower harmonics is achieved by replacing the traditional 2-level converter cells with 3-level cells. Circulating current is eliminated by using hybrid connection for multiphase generator design to replace the commonly used parallel converter structure for 3-phase generator design, the issues for neutral-point voltage imbalance is also eliminated. The mathematical model of MPPMSG and variable-speed control strategy are built and verified in PSCAD/EMTDC. A 3.5 kVA MPPMSG prototype machine and a set of hybrid 3L multi-converter systems are built. The experimental results validate the model and the effectiveness of the control strategies.
机译：基于多相永磁同步发电机（MPPMSG）和使用三级中性点钳位转换器（3L-NPC）的混合多转换器系统的新型全尺寸风能转换系统，用于大功率直驱式风力发电机在这项研究中提出。通过将传统的2级转换器单元替换为3级单元，可以实现更高的效率，更低的谐波。通过将混合连接用于多相发电机设计来消除循环电流，以取代三相发电机设计中常用的并联转换器结构，还消除了中性点电压不平衡的问题。在PSCAD / EMTDC中建立并验证了MPPMSG的数学模型和变速控制策略。构建了一个3.5 kVA MPPMSG原型机和一组混合3L多转换器系统。实验结果验证了该模型和控制策略的有效性。

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