Push-Pull Microinverter based on a Sub-modular Structure

Muñoz, Javier; Díaz, Manuel; Rivera, Marco; Dekka, Apparao

doi:10.1109/speedam53979.2022.9842079

Cited by 1 publication

(3 citation statements)

References 14 publications

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“…Different topologies of push-pull microinverters have been proposed [26][27][28][29]. These topologies vary in the conformation of the push-pull converter or the forms that the DC-link is implemented.…”

Section: Introductionmentioning

confidence: 99%

“…In [28], a single-stage microinverter topology based on a push-pull converter integrated with a quasi-Z source network and coupled with a voltage unfolder is presented, which does not use a DC-link in its structure. In [29], a push-pull microinverter based on a submodular structure is presented, which connects three push-pull converters to an H-bridge inverter to generate alternating current at the microinverter AC side. In [30], a current-fed push-pull quasi-resonant converter is proposed.…”

Section: Introductionmentioning

confidence: 99%

“…In [26], a P&O algorithm is used with a PI and a PR control to control the current injected into the grid. In [29], PI control for each push-pull converter that makes up the topology structure and predictive control for the H-bridge inverter are presented, but there are no results of the grid connection.…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Control Strategy for a Push–Pull Microinverter Connected to the Grid

et al. 2023

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The effects of partial shading or dust accumulation on the panels of photovoltaic systems connected to the grid can generate a considerable reduction in energy performance, being necessary to provide the appropriate voltage to the grid regardless of the irradiance level. This paper addresses this problem and presents a comprehensive control strategy and its implementation for a grid-connected microinverter composed of a push–pull converter followed by an H-bridge inverter. In the push–pull converter, a hybrid MPPT algorithm and a PI control enable work in the MPP of the PV panel. In the H-bridge inverter, a cascade control consisting of a PI control and a predictive control allows the connection to the grid. A proof-of-concept prototype is implemented in order to validate the proposal. Experimental tests were performed by connecting the microinverter to a PV panel and a programmable photovoltaic panel emulator to check the MPPT performance. Furthermore, partial shading conditions were simulated on the dc source to check if the global maximum power point is reached. Experimental results demonstrate the feasibility of the topology and the control approach, obtaining MPPT performance in the topology above 99% at different power and voltage levels on the MPPT, even in the presence of partial shading conditions.

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Section: Introductionmentioning

confidence: 99%