Single-switch galvanically isolated step-up DC-DC converter for residential photovoltaic applications

This paper evaluates a modified single-switch galvanically isolated quasi-Z-source DC-DC converter intended as a topology for photovoltaic module-level power electronics applications. The operation principle of the converter is explained by the help of the steady-state analysis. To verify theoretical assumptions and evaluate the performance of the proposed concept, a 200 W experimental prototype of a photovoltaic microconverter was assembled and tested.