High power conversion technologies & trend

For high power application, high voltage converter technologies are very important. In this paper, various high power converter technologies are introduced and compared. The paper proposes a simple, reliable and cost effective IGBT series technology with effective over voltage and short circuit protection. Together with 3-level inverter technology, IGBT series technology is able to provide transformer-less solution for MVD, HVDC and other high voltage application. Compared with other transform-less solution such as MMC, it is more reliable and cost effective.