Experiment and analysis for single IGCT equipped in MV three-level inverter

In order to ensure the reliability and dynamic characters of IGCTs equipped in MV (medium voltage) three-level inverter, the switching experiments for single IGCT in the inverter are proposed in this paper. The experiment scheme is described in detail, including the topology, key parameters and the control method. Based on the experiment results, the switching behavior for every IGCT in the inverter is compared, and the influence factors to the behavior are analyzed, such as the inverter´s structure, topology position of IGCTs, the stray inductance in commutating loop, etc Finally, the advantages of the experiment are summarized in the conclusions.