Evran, Fatih2020-04-302020-04-3020171755-45351755-4543https://doi.org/10.1049/iet-pel.2015.0950https://hdl.handle.net/20.500.12684/4127WOS: 000393785200006This study presents two-stage inverter topology for single-phase grid-connected photovoltaic (PV) applications and its control implementations. The two-stage systems are reliable and work well. Typically, the second stage inverts solar power into AC power, whereas the first stage which is used to increase low PV panel voltage can achieve maximum power point tracking. In this configuration, a boost or a flyback type DC/DC converter topology is usually employed. However, such converters have major drawbacks such as low efficiency and limited voltage gain due to power losses. In the proposed topology, a low-voltage PV panel can be connected to power grid through solar inverter by using high-gain DC/DC converter which has unique features such as galvanic isolation and continuous current for AC module applications. Conventional controller results in poor control performance due to the finite gain at desired frequencies. Hence, a plug-in repetitive controller is proposed to obtain low total harmonic distortions (THDs). The performance of the proposed system is provided for the system which injects the PV panel current in the maximum power point voltage to a grid of 220 V-(rms) at a power range of 150-300 W with a unity power factor and a low input current THD.en10.1049/iet-pel.2015.0950info:eu-repo/semantics/closedAccessharmonic distortionsolar cell arraysinvertorspower gridsmaximum power point trackerspower conversion harmonicselectric current controlAC module applicationssingle-phase grid-connected invertertwo-stage inverter topologysingle-phase grid-connected photovoltaic applicationssingle-phase grid-connected PV applicationscontrol implementationssolar into AC power inversionlow PV panel voltage enhancementmaximum power point trackingflyback type DC-DC converter topologysolar inverterpower gridhigh-gain DC-DC converterAC module applicationslow total harmonic distortionslow input current THDplug-in repetitive current controllervoltage 220 Vpower 150 W to 300 WArticle1014758WOS:000393785200006Q1Q2