Modeling and control of a high step-up active-clamp dc-dc converter applied to a hybrid architecture of PV converters

摘要

Hybrid architectures inverters for photovoltaic (PV) systems are an alternative to increase energy production in PV systems under partial shading conditions. For such systems, non-shaded modules are arranged in series, whereas shaded modules are set in parallel. To match the voltage of both arrays, a high step-up active-clamp dc-dc converter is used to increase the voltage of the parallel array allowing its connection in parallel with the series array. This paper presents a dynamic modeling of this dc-dc converter considering the generalized modeling approach. A control system is also designed. Simulation results have been carried out to validate the modeling technique and the designed control system.