Systematic Topology Synthesis and Power Density Visualization of Partial Power Processing Architecture

DC–DC converters based on partial power processing (PPP) offer the advantage of high power density and high efficiency and are considered an attractive solution in various systems like photovoltaic systems, energy storage systems. This article investigates the systematic topology synthesis and power density visualization of PPP architecture. PPP topologies overlap significantly with existing nonisolated topologies. To enhance the current topology synthesis approach, a synthesis method for PPP topologies is proposed. A general expression set for voltage gain is proposed for the convenience of studying the synthesized topologies. A visualization scheme for the power density of the topology is proposed for the first time. The topology synthesis method offers a fresh perspective for systematically explaining existing topologies. Through the visualization of topology power density, the power density of nonisolated topologies can be quantitatively evaluated. Nonisolated topologies can be systematically synthesized and classified from the perspective of PPP. Using the proposed power density visualization scheme, topologies with higher power density, known as PPP topologies, can be selected. The feasibility of the synthesized topologies and the power density visualization scheme are respectively validated through design and experiment.