Modified Cuk Converter-Based Two-Stage Microinverter Topology Design

The application of renewable energy in the form of photovoltaics is a challenge to provide electrical energy for people lives in remote areas which in turn will improve their life quality. The proposed modified Cuk converter-based two-stage microinverter topology design that able to directly convert low voltage DC voltage output of single PV panel, DC-DC converter is put as the first stage, while modified Cuk converter works to convert into 220 Vac 50 Hz in the second stage. To anticipate the disturbance due to change of solar irradiance, this paper also proposes closed-loop system to keep the constant 220 Vac 50 Hz output. It can be shown that the proposed topology and control method is successfully generate constant output voltage from single PV panel input under irradiance disturbance conditions.