Study on thyristor valve series mechanism based on device physical characteristic

The systematic theory has always been absent for the high voltage thyristor valve series, and the device characteristic is often neglected. To meet the requirement of the new power industry developing strategy and advance the research on high power electronics equipment reliability, the series mechanism of high voltage thyristor valve for FACTS and HVDC is studied. The physical process of the including processes is expounded, the corresponding mathematic model, especially the reverse recovery model, is built with thyristor characteristic integrated, and the boundary conditions are inferred. So it is systemized and determinate on theoretic level for the series mechanism. Based on this, the traditional serial connection technology is improved.