The ABB 5SHX2645L0002 is an IGCT module, which combines a Gate – Commutated Thyristor (GCT) with an integrated gate – drive circuit5. It has the high – blocking capability and low – on – state voltage drop of a GTO, as well as the switching performance similar to that of an IGBT5. It is an ideal medium – voltage switching device for megawatt – level applications and is widely used in high – power medium – voltage converters5. It features high – precision control, strong anti – interference ability, and easy integration6. It can effectively improve the response speed and stability of power systems, and is suitable for various industrial control scenarios such as factory automation, power supply, transportation, and infrastructure construction6.