中文摘要：

提出一种新型机电混合无级变速（mechanical andelectrical variable transmission,M-EVT）风力发电系统,采用一级机械增速装置进行升速,电气无级变速器进行调速,既提高了系统的可靠性,减小了系统的体积,又省去了复杂的大功率电力电子装置,能够实现真正的变速恒频,最大限度的利用风能。分析了机电混合无级变速风力发电系统的工作原理、各工作流程中功率流的变化和电气变速器的运行模式,并对各运行模式下的控制策略进行了仿真分析,制作了电气无级变速器样机并搭建了机电混合无级变速风力发电实验平台,进行了相关的实验。仿真和实验结果验证了理论分析的正确性,为机电混合无级变速风力发电系统的设计和应用研究打下了基础。

英文摘要：

A novel wind power generation system based on mechanical and electrical variable transmission（M-EVT） is proposed,which utilizes one-stage mechanical gearbox to boost the speed and EVT to regulate the speed.The system could not only realize variable speed constant frequency（VSCF） operation and wind power maximum power point tracking（MPPT） control,but also increases the system reliability,reduces the system volume and capacity of complex power electronic apparatus.In this paper,the principles of the wind power generation system based on M-EVT were presented.The operation processes of the system and the operational modes of EVT in the system were analyzed.Computer simulation of a generation cycle was used to validate the operational modes and control strategies of the M-EVT system.An EVT prototype machine was fabricated and the test bench of the M-EVT system was implemented.Experimental results were given to verify the theoretical analysis,which make the foundation for further research and application of M-EVT wind power generation system.