Research on a novel 12-phase rectifier power generation system and its rectifier-side short circuit fault

Abstract

A 12-phase rectifier power generation system with a new type of topology and its rectifier-side short circuit fault are studied. The new type of system has four sets of rectifier devices with two series and two parallel and the traditional system has four sets of rectifier device with four parallels. The difference of DC voltage and DC current in normal operation and rectifier-side fault between them is analyzed. For the rectifier-side short circuit fault under no-load condition, the short circuit current expressions in AC side and DC side are derived, the novel rectifier power system simulation model is established in Matlab/Simulink software environment and rectifier-side short circuit fault simulation is performed. The simulation results accord with the derived expression of the short circuit current.