IGCT器件工作过程损耗分析

Analysis on the Loss of IGCT

使用IGCT器件的大功率三电平交-直-交变流器得到广泛的应用,IGCT及其辅助电路的损耗将影响变流器系统效率。首先对IGCT器件工作过程损耗进行分析,并通过试验对IGCT开关过程,尤其是关断过程的损耗进行近似计算,然后通过系统仿真考察IGCT工作过程中其自身及辅助电路的损耗,并估算损耗的组成。研究结果表明IGCT器件工作过程中消耗的能量,主要为IGCT器件的关断损耗及各部分的导通损耗。这为IGCT变流器系统的损耗研究奠定了基础,并将为变流器冷却系统的设计提供指导。

Large power three-level AC-DC-AC converters with IGCTs is widely used in many fields now,and the loss of IGCT and its support circuit will influence the converter's efficiency.The loss of the IGCT's working process is analyzed.And with experimental results,the switching loss,especially the turn-off loss of the IGCT is calculated approximatively.Then with system simulation,the loss of the IGCT's working process and its support circuit is analyzed,and the component of the whole loss is evaluated.The results show that the main loss of the IGCT's working process is the turn-off loss of IGCT and the on-state loss of the related devices.This establishes the base of the research on the converter's loss,and it will also offer a guide for the cooling system design of the converter.