Modelling and control of interleaved parallel converters with nonidentical parameters

This paper addresses the dynamic modelling and control design of interleaved parallel DC-DC buck (or buck derived) converters with circuit parameter imbalance. It is shown that the imbalance in the filter inductance of the individual converter stages has a great impact on the differential mode stability of the overall system. Control strategies to ensure system stability and current sharing performance both under steady-state and transient conditions are presented with results of simulation and experiments performed on a high-power telecom power converter.