Integrated Cuk Inverter for Single-Phase Grid-Tied Photovoltaic System

In this paper, a novel integrated converter designed to step-up the photovoltaic (PV) array voltage, and also to inject the extracted PV array energy into the single-phase AC mains is presented. The DC-AC topology is deployed using two modified Cuk converters, named as Integrated Cuk Inverter (ICI). The ICI output current is controlled employing the hysteresis current control. The maximum power point of the PV array is tracked down by using the perturb and observe technique. Therefore, the presented ICI topology is proposed to be used in the replacement of the traditional double stage PV system. Moreover, the injected current into the grid presents low total harmonic distortion. From simulation results, the feasibility of the proposed system, as well as the control technique are validated.