Novel Approach to Develop Behavioral Model Of 12-Pulse Converter

A novel approach to develop behavioral model of 12-pulse converter, which reduces the overall system simulation time, is presented. A detailed model of a 12-pulse converter with its control using circuit simulation tools such as PSPICE, MATLAB or SABER takes significant computer time for simulation. This is even more critical when the power converter is only a small part of a large system under study. A model based on mathematical equations derived under ideal conditions could be used, but the need to consider secondary effects such as continuous and discontinuous current or current commutation make this method much complicated due to the multiple modes of power converter operation. A regression based behavioral model was developed using a "design of experiment" (DOE) approach with very good statistical fit. This reduces simulation time drastically capturing also those aspects of the 12-pulse converter that are not normally included in models using other simplifications. This method could also be extended to the modeling of other complex power converter topologies and subsystems allowing a much faster simulation of full installations.