Design Paradigm for Power Electronics-Based DC Distribution Systems

The design of a dc distribution system is posed as an optimization problem, which simultaneously utilizes time-domain analysis, distortion analysis, and stability analysis. The complete power distribution system is taken into consideration in the design process, capturing the interaction between various system components. Multiobjective optimization of mass and power loss metrics subject to transient performance constraints, distortion constraints (voltage and current ripple constraints), and stability constraints is carried out in the proposed design paradigm. This provides an organized framework for the design of dc power distribution systems. The approach is demonstrated through the design of a representative system that consists of a generation system, two isolating peak current controlled dc-dc converter modules, and two constant power loads. A sample design is chosen and verified using a detailed waveform level simulation.