Abstract
In this paper, a low kilo-volt-ampere rating zigzag connected
autotransformer based 36-pulse rectifier system supplying vector
controlled induction motor drives (VCIMD) is designed, modeled and
simulated. Detailed design procedure and magnetic rating calculation of
the proposed autotransformer and interphase reactor is studied. Moreover,
the design process of the autotransformer is modified to make it suitable
for retrofit applications. Simulation results confirm that the proposed
36-pulse rectifier system is able to suppress less than 35th harmonics in
the utility line current. The influence of load variation and load
character is also studied to demonstrate the performance and effectiveness
of the proposed 36-pulse rectifiers. A set of power quality indices at AC
mains and DC link are presented to compare the performance of 6-, 24- and
36-pulse AC-DC converters.
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