Modeling and control of charge-pumped reboost converter for pv applications

Two-stage, grid-tied Photovoltaic (PV) systems commonly use boost-type converters at the front end. The charge-pumped reboost converter is a high-step-up dc-dc converter with continuous input-current which is suitable for this purpose. Using a tapped-inductor boost topology for the small-signal model, a high-bandwidth input-voltage loop can be designed which rapidly tracks reference changes, source transients, and can reject disturbances from the load. The practicality of this model is verified experimentally with frequency response analysis, transient response, and system-level testing.