A New Design Method for Multistage DC Power Distribution Systems

In this paper, we propose a new design method for multistage dc power distribution systems, which employ several pulsewidth modulated (PWM) converter stages and intermediate line filters in a cascaded manner. In the proposed method, individual PWM converter stages are initially built as a standalone converter, powered from an ideal voltage source and loaded with a current sink. Once the individual PWM converters are properly engineered based on the standard procedures, the intermediate filters are then designed and fabricated to provide the desired converter performance, dc link dynamics, system stability, and system dynamics. Thus, the task of designing a dc power distribution systems is reduced to the design problem of intermediate line filters. The validity of the proposed method is confirmed with an experimental dc power distribution system.