implement of a high current three phase double star rectifier

in this paper a double star rectifier with interphase connection that know as ansi 45 has been studied. to achieve high direct current, rectifiers will be paralleled, which it know as multi-phase rectifiers. harmonics transferred to the grid are reduced by multi-phase rectifiers. double star rectifiers are used for low voltage and high direct current in the industry applications. also, to overcome the saturation state of the transformer, a reactor is used at the common point of the star. in this rectifier, the output injected current will be controlled. matlab/simulink software is used to simulate this rectifier. then a 6 ka, 180 kw double star rectifier is designed and made.