风力发电系统变流器的效率分析

发布时间：2018-01-31 09:59

本文关键词： 风力发电系统变流器三电平碳化硅损耗　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：风力发电作为发展最快的新能源产业之一,受到人们越来越多的关注。作为风力发电机与电网的有效接口,电力电子变流器对提高风力发电系统的性能十分关键。本文在分析双馈和直驱风力发电系统的特性的基础上,探讨风力发电系统变流器的损耗和效率优化问题。分别设计了两电平和三电平变流器主电路,进而建立了风电变流器的损耗模型。并比较了额定风速工作点两电平和三电平变流器,比较了双馈与直驱风力发电系统的性能。由于碳化硅(SiC)器件具有阻断电压高、开关速度快、耐高温的特点,具有良好的应用前景。论文分析了基于SiC器件的2MW双馈、直驱风力发电系统,与Si IGBT两电平、三电平(NPC)变流器的效率进行比较。
[Abstract]:As one of the fastest growing new energy industries, wind power generation has attracted more and more attention. Power electronic converter is very important to improve the performance of wind power system. On the basis of analyzing the characteristics of doubly-fed and direct-drive wind power generation systems, this paper discusses the loss and efficiency optimization of wind power system converters, and designs the main circuits of two-level and three-level converters, respectively. Furthermore, the loss model of wind power converter is established, and the two-level and three-level converters at rated wind speed are compared, and the performance of doubly-fed and direct-drive wind power generation systems is compared. Because of its high blocking voltage, fast switching speed and high temperature resistance, sic device has a good application prospect. The 2MW doubly-fed device based on SiC device is analyzed in this paper. The efficiency of direct-drive wind power system is compared with that of Si IGBT two-level and three-level converter.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46;TM614

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