Comprehensive Analysis Dedicated to Three-phase Power Transformer With Three-phase Bridge in AC/DC Traction Substations

This study encompasses a comprehensive analysis of the three-phase transformer - three-phase rectifier assembly, and the establishment of the equivalent circuit of the AC / DC conversion group at the average DC components level. Since the efficiency standards can be expressed in terms of electrical efficiency, in an attempt to improve the transformer efficiency, in this study an enhancement of three-phase power transformer modelling with space phasors is presented. There are established the equations with space phasors of the three-phase transformer with symmetrical compact core. This equations system can be used to analyse the dynamic regimes of threephase transformers. In this study the authors comprehensively analysed aspects of three-phase power transformer with Graetz three-phase bridge assembly operating in AC/DC traction substations.