Push-Pull Microinverter based on a Sub-modular Structure

In photovoltaic (PV) systems, the effects of partial shading or dust accumulation on the panels can generate a large reduction in energy performance, because the panels have different maximum power points (MPP) under these conditions. These challenges have promoted the development of several PV microinverter topologies, among which is the sub-modular structure, which considers the PV panel without bypass diodes and perform a MPPT on each sub-module composing the structure, in this way, it is possible to reach the MPP individually, thus mitigating the reduction in energy performance. In this work, the sub-modular structure consisting of Push-Pull microinverters with DC-link is presented. The viability of the topology and control proposal is checked by computer simulations, presenting the main results.