Transformer-less five-level high-voltage full-scale converter with a self-balance auxiliary circuit for 10MW wind turbines
Transformer-less five-level high-voltage full-scale converter with a self-balance auxiliary circuit for 10MW wind turbines
复制标题
10MW风电机组无变压器自平衡辅助电路五电平高压满量程变流器
DOI：
10.1049/iet-pel.2017.0007
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发表时间：
2017
影响因子：
2
通讯作者：
Yang Xu
中科院分区：
文献类型：
--
作者：
Zeng Xiang-jun;Wang Hang;Zhang Xiao;Gong De-ling;Yang Xu
提出了一种用于 10 MW 风力涡轮机的新型无变压器五电平 (5L) 高压满量程转换器。在该方案中，单向正弦5L维也纳整流器用作发电机侧的变速控制器，传统的5L中性点钳位（NPC）逆变器用作并网转换器。固有的直流环节 NP 不平衡问题只能通过提出的直流环节自平衡辅助电路来解决。本研究重点研究整流器的调制技术和辅助电路的工作原理。此外，它还提出了所提出的转换器的控制策略。最后通过小规模实验验证了分析结果。
A novel transformer‐less five‐level (5L) high‐voltage full‐scale converter is proposed for 10 MW wind turbines. In this scheme, a unidirectional sinusoidal 5L‐Vienna rectifier is used as a variable‐speed controller at the generator side, and a conventional 5L neutral‐point‐clamped (NPC) inverter is used as the grid‐integrated converter. The intrinsic dc‐link NP imbalance issue is solved only by a proposed dc‐link self‐balance auxiliary circuit. This study focuses on the modulation technology of the rectifier and the operational principle of the auxiliary circuit. Furthermore, it presents a control strategy for the proposed converter. Finally, the small‐scale experiments are carried out to verify the analysis.