A unified proposal for characteristic testing methods and figure of merit of 8-kV/3.5-kVA class light-triggered thyristors

摘要

Power devices with high capability have been developed. 8-kV/3.5-kA-class light-triggered thyristors have the highest capability among power devices. These devices are used in the Ku Channel HVDC transmission system in Japan. In this paper, we report the extracted problems of conventional testing methods of 8-kV/3.5-kA-class light-triggered thyristors among manufacturers, and the proposed unified testing methods on the basis of element characteristics and operating conditions in the Ku Channel HVDC system. Furthermore, we propose a figure of merit for power devices for the practical use, and try to extract elements used at the Ku Channel HVDC system with small margins and low withstand capabilities.