以某企业建立的采用液冷冷却系统的 IGBT 模块实验平台为基础，对一 3 MW 紧凑型风电机组的 IGBT 模块的热特性进行了分析．根据在动态实验中采集到的数据，得出了逆变器输出功率与时间的关系，并结合实验数据对模块温度以及发热量的变化特性进行了分析，得到了兆瓦级风电变流器中 IGBT 模块温度与发热量随时间的变化关系．实测结果表明，该风电机组逆变器的效率为 98．62%，IGBT 模块的最终工作温度保持在 50 ～56℃，说明采用的液冷冷却系统对大功率 IGBT 模块具有良好的冷却效果．

In this paper,thermal properties of the IGBT modules of a 3 MW compact wind turbine generator areanalyzed based on the liquid- cooling system platform of IGBT modules established by a company.Then,according tothe data collected in dynamic experiments,the relationships between the output power of the inverter and time are ex-plored.Moreover,by analyzing the variation characters of the temperature of IGBT modules and the power dissipationwith a combination of experimental data,the temperature of IGBT modules and the heat value varying with time arediscussed for a MW- level wind power converter.Experimental results show that the inverter efficiency of the windturbine generator reaches 98.62%,and that the operation temperature of the IGBT modules ranges from 50 to 56℃.It is thus concluded that the adopted liquid- cooling system has good cooling effect on high- power IGBT modules.