IGBT串联的三电平风电变流器拓扑研究  

Research on Three-level Wind Power Converter Topology with Series-connected IGBTs

作　　者：王小涛 廖丽贞 赵宇 

机构地区：[1]许昌许继风电科技有限公司,河南许昌461000 [2]许继电气股份有限公司,河南许昌461000 [3]许继柔性输电系统公司,河南许昌461000

出　　处：《四川电力技术》2017年第3期86-90,共5页Sichuan Electric Power Technology

摘　　要：三电平拓扑结构简单可靠,但由于开关器件的耐压水平限制,低压单管IGBT拓扑的交流侧输出电压、功率水平均较低。提出一种新型IGBT串联的三电平风电变流器。首先,采用了T型三电平结构,并在正负母线回路中使用两管1.7kV的IGBT串联,即可输出3kV的交流侧电压;其次,给出了IGBT串联提高开关频率的原理、IGBT串联的保护与均压方案。最后,建立了3kV电压等级的实验平台,验证了IGBT串联型三电平拓扑的有效性。The structure of three - level topology is simple and reliable, but due to the limit of withstand voltage level of switch devices, the AC output voltage and power of low - voltage single - tube IGBT topology are low. A new kind of three - level wind power converter with series - connected IGBTs is proposed. Firstly, two tubes are used in the positive and negative bus circuit of T type three - level structure and 1.7 kV IGBT is series connected to increase the output voltage to 3 kV. Secondly, this principle of series - connected IGBTs to improve switch frequency, and the schemes for IGBT series protection and series voltage balance are presented. Finally, 3 kV experiment platform is set up to verify the validity of three - level topology with series - connected IGBTs.

关 键 词：三电平拓扑 风电变流器 开关频率 串联均压 

分 类 号：TM614[电气工程—电力系统及自动化]