Three-phase multipulse ac-dc converters are extensively used for improving power quality to reduce harmonics in ac mains and ripples in dc output. This paper deals with different topologies of Low Voltage High Current (LVHC) multipulse ac-dc converter for low voltage high current applications. The performance of these converters is investigated and compared in view of power quality aspects, and suitability to Low Voltage High Current (LVHC) applications. Simulation results of twelve pulse converters of various topologies are analysized. 24-pulse converter with primary series connected zigzag and secondary star satisfy the requirements of IEEE-519-1992 standard for maintaining good quality of power at utility as well as consumer end.