23-10-2010, 10:26 AM
The parallel operation of two three-pulse controlled converters with interphase transformer (IPT) is modeled and analyzed in this report. The voltage difference between DC voltages of the two converters is absorbed by the interphase transformer, thereby ensuring that independent operation is carried out without any circulating current. six-pulse output voltage also results from it so that less harmonic distortions results from it. The complete circuit is solved by using modified nodal analysis (MNA). While this process, the magnetic nonlinearity in the IPT core is also considered to reduce the error. The dynamic inductance model is utilized to represent the magnetic non-linearity of the transformer. Here, small and large resistances during ON and OFF states is used as the model to represent the Power electronic switches. The code used for modeling and simulating the circuit in the case of balanced and short circuit conditions has also been written.
Get the report here:
http://dspace.library.iitb.ac.in/jspui/b...685366.pdf